[experiment] add alternative wasm sqlite3 implementation available via build-tag (#2863)

This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).

go.mod

@@ -44,6 +44,7 @@ require (
 	github.com/miekg/dns v1.1.59
 	github.com/minio/minio-go/v7 v7.0.70
 	github.com/mitchellh/mapstructure v1.5.0
+	github.com/ncruces/go-sqlite3 v0.16.0
 	github.com/oklog/ulid v1.3.1
 	github.com/prometheus/client_golang v1.19.1
 	github.com/spf13/cobra v1.8.0
@@ -78,7 +79,7 @@ require (
 	golang.org/x/text v0.15.0
 	gopkg.in/mcuadros/go-syslog.v2 v2.3.0
 	gopkg.in/yaml.v3 v3.0.1
-	modernc.org/sqlite v1.29.8
+	modernc.org/sqlite v0.0.0-00010101000000-000000000000
 	mvdan.cc/xurls/v2 v2.5.0
 )
 
@@ -173,6 +174,7 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/ncruces/go-strftime v0.1.9 // indirect
+	github.com/ncruces/julianday v1.0.0 // indirect
 	github.com/opencontainers/runtime-spec v1.0.2 // indirect
 	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
@@ -197,6 +199,7 @@ require (
 	github.com/superseriousbusiness/go-jpeg-image-structure/v2 v2.0.0-20220321154430-d89a106fdabe // indirect
 	github.com/superseriousbusiness/go-png-image-structure/v2 v2.0.1-SSB // indirect
 	github.com/tdewolff/parse/v2 v2.7.14 // indirect
+	github.com/tetratelabs/wazero v1.7.2 // indirect
 	github.com/tmthrgd/go-hex v0.0.0-20190904060850-447a3041c3bc // indirect
 	github.com/toqueteos/webbrowser v1.2.0 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect

go.sum

@@ -445,8 +445,12 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/moul/http2curl v1.0.0 h1:dRMWoAtb+ePxMlLkrCbAqh4TlPHXvoGUSQ323/9Zahs=
 github.com/moul/http2curl v1.0.0/go.mod h1:8UbvGypXm98wA/IqH45anm5Y2Z6ep6O31QGOAZ3H0fQ=
+github.com/ncruces/go-sqlite3 v0.16.0 h1:O7eULuEjvSBnS1QCN+dDL/ixLQZoUGWr466A02Gx1xc=
+github.com/ncruces/go-sqlite3 v0.16.0/go.mod h1:2TmAeD93ImsKXJRsUIKohfMvt17dZSbS6pzJ3k6YYFg=
 github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdhx/f4=
 github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
+github.com/ncruces/julianday v1.0.0 h1:fH0OKwa7NWvniGQtxdJRxAgkBMolni2BjDHaWTxqt7M=
+github.com/ncruces/julianday v1.0.0/go.mod h1:Dusn2KvZrrovOMJuOt0TNXL6tB7U2E8kvza5fFc9G7g=
 github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
 github.com/oklog/ulid v1.3.1 h1:EGfNDEx6MqHz8B3uNV6QAib1UR2Lm97sHi3ocA6ESJ4=
 github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
@@ -558,6 +562,8 @@ github.com/tdewolff/test v1.0.11-0.20240106005702-7de5f7df4739 h1:IkjBCtQOOjIn03
 github.com/tdewolff/test v1.0.11-0.20240106005702-7de5f7df4739/go.mod h1:XPuWBzvdUzhCuxWO1ojpXsyzsA5bFoS3tO/Q3kFuTG8=
 github.com/technologize/otel-go-contrib v1.1.1 h1:wZH9aSPNWZWIkEh3vfaKfMb15AJ80jJ1aVj/4GZdqIw=
 github.com/technologize/otel-go-contrib v1.1.1/go.mod h1:dCN/wj2WyUO8aFZFdIN+6tfJHImjTML/8r2YVYAy3So=
+github.com/tetratelabs/wazero v1.7.2 h1:1+z5nXJNwMLPAWaTePFi49SSTL0IMx/i3Fg8Yc25GDc=
+github.com/tetratelabs/wazero v1.7.2/go.mod h1:ytl6Zuh20R/eROuyDaGPkp82O9C/DJfXAwJfQ3X6/7Y=
 github.com/tidwall/btree v0.0.0-20191029221954-400434d76274 h1:G6Z6HvJuPjG6XfNGi/feOATzeJrfgTNJY+rGrHbA04E=
 github.com/tidwall/btree v0.0.0-20191029221954-400434d76274/go.mod h1:huei1BkDWJ3/sLXmO+bsCNELL+Bp2Kks9OLyQFkzvA8=
 github.com/tidwall/buntdb v1.1.2 h1:noCrqQXL9EKMtcdwJcmuVKSEjqu1ua99RHHgbLTEHRo=

internal/api/client/media/mediacreate_test.go

@@ -38,7 +38,6 @@
 	"github.com/superseriousbusiness/gotosocial/internal/federation"
 	"github.com/superseriousbusiness/gotosocial/internal/filter/visibility"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
-	"github.com/superseriousbusiness/gotosocial/internal/log"
 	"github.com/superseriousbusiness/gotosocial/internal/media"
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
 	"github.com/superseriousbusiness/gotosocial/internal/processing"
@@ -77,19 +76,22 @@ type MediaCreateTestSuite struct {
 	TEST INFRASTRUCTURE
 */
 
-func (suite *MediaCreateTestSuite) SetupSuite() {
+func (suite *MediaCreateTestSuite) SetupTest() {
-	suite.state.Caches.Init()
 	testrig.StartNoopWorkers(&suite.state)
 
 	// setup standard items
 	testrig.InitTestConfig()
 	testrig.InitTestLog()
 
-	suite.db = testrig.NewTestDB(&suite.state)
+	suite.state.Caches.Init()
-	suite.state.DB = suite.db
+
 	suite.storage = testrig.NewInMemoryStorage()
 	suite.state.Storage = suite.storage
 
+	suite.db = testrig.NewTestDB(&suite.state)
+	testrig.StandardDBSetup(suite.db, nil)
+	testrig.StandardStorageSetup(suite.storage, "../../../../testrig/media")
+
 	suite.tc = typeutils.NewConverter(&suite.state)
 
 	testrig.StartTimelines(
@@ -106,21 +108,8 @@ func (suite *MediaCreateTestSuite) SetupSuite() {
 
 	// setup module being tested
 	suite.mediaModule = mediamodule.New(suite.processor)
-}
-
-func (suite *MediaCreateTestSuite) TearDownSuite() {
-	if err := suite.db.Close(); err != nil {
-		log.Panicf(nil, "error closing db connection: %s", err)
-	}
-	testrig.StopWorkers(&suite.state)
-}
-
-func (suite *MediaCreateTestSuite) SetupTest() {
-	suite.state.Caches.Init()
-
-	testrig.StandardDBSetup(suite.db, nil)
-	testrig.StandardStorageSetup(suite.storage, "../../../../testrig/media")
 
+	// setup test data
 	suite.testTokens = testrig.NewTestTokens()
 	suite.testClients = testrig.NewTestClients()
 	suite.testApplications = testrig.NewTestApplications()
@@ -132,6 +121,7 @@ func (suite *MediaCreateTestSuite) SetupTest() {
 func (suite *MediaCreateTestSuite) TearDownTest() {
 	testrig.StandardDBTeardown(suite.db)
 	testrig.StandardStorageTeardown(suite.storage)
+	testrig.StopWorkers(&suite.state)
 }
 
 /*

internal/api/client/media/mediaupdate_test.go

@@ -36,7 +36,6 @@
 	"github.com/superseriousbusiness/gotosocial/internal/federation"
 	"github.com/superseriousbusiness/gotosocial/internal/filter/visibility"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
-	"github.com/superseriousbusiness/gotosocial/internal/log"
 	"github.com/superseriousbusiness/gotosocial/internal/media"
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
 	"github.com/superseriousbusiness/gotosocial/internal/processing"
@@ -75,18 +74,22 @@ type MediaUpdateTestSuite struct {
 	TEST INFRASTRUCTURE
 */
 
-func (suite *MediaUpdateTestSuite) SetupSuite() {
+func (suite *MediaUpdateTestSuite) SetupTest() {
 	testrig.StartNoopWorkers(&suite.state)
 
 	// setup standard items
 	testrig.InitTestConfig()
 	testrig.InitTestLog()
 
-	suite.db = testrig.NewTestDB(&suite.state)
+	suite.state.Caches.Init()
-	suite.state.DB = suite.db
+
 	suite.storage = testrig.NewInMemoryStorage()
 	suite.state.Storage = suite.storage
 
+	suite.db = testrig.NewTestDB(&suite.state)
+	testrig.StandardDBSetup(suite.db, nil)
+	testrig.StandardStorageSetup(suite.storage, "../../../../testrig/media")
+
 	suite.tc = typeutils.NewConverter(&suite.state)
 
 	testrig.StartTimelines(
@@ -103,21 +106,8 @@ func (suite *MediaUpdateTestSuite) SetupSuite() {
 
 	// setup module being tested
 	suite.mediaModule = mediamodule.New(suite.processor)
-}
-
-func (suite *MediaUpdateTestSuite) TearDownSuite() {
-	if err := suite.db.Close(); err != nil {
-		log.Panicf(nil, "error closing db connection: %s", err)
-	}
-	testrig.StopWorkers(&suite.state)
-}
-
-func (suite *MediaUpdateTestSuite) SetupTest() {
-	suite.state.Caches.Init()
-
-	testrig.StandardDBSetup(suite.db, nil)
-	testrig.StandardStorageSetup(suite.storage, "../../../../testrig/media")
 
+	// setup test data
 	suite.testTokens = testrig.NewTestTokens()
 	suite.testClients = testrig.NewTestClients()
 	suite.testApplications = testrig.NewTestApplications()
@@ -129,6 +119,7 @@ func (suite *MediaUpdateTestSuite) SetupTest() {
 func (suite *MediaUpdateTestSuite) TearDownTest() {
 	testrig.StandardDBTeardown(suite.db)
 	testrig.StandardStorageTeardown(suite.storage)
+	testrig.StopWorkers(&suite.state)
 }
 
 /*

internal/api/fileserver/fileserver_test.go

@@ -70,8 +70,6 @@ func (suite *FileserverTestSuite) SetupSuite() {
 	testrig.InitTestConfig()
 	testrig.InitTestLog()
 
-	suite.db = testrig.NewTestDB(&suite.state)
-	suite.state.DB = suite.db
 	suite.storage = testrig.NewInMemoryStorage()
 	suite.state.Storage = suite.storage
 
@@ -98,8 +96,12 @@ func (suite *FileserverTestSuite) SetupTest() {
 	suite.state.Caches.Init()
 	testrig.StartNoopWorkers(&suite.state)
 
+	suite.db = testrig.NewTestDB(&suite.state)
+	suite.state.DB = suite.db
+
 	testrig.StandardDBSetup(suite.db, nil)
 	testrig.StandardStorageSetup(suite.storage, "../../../testrig/media")
+
 	suite.testTokens = testrig.NewTestTokens()
 	suite.testClients = testrig.NewTestClients()
 	suite.testApplications = testrig.NewTestApplications()

internal/config/global.go

@@ -52,3 +52,9 @@ func LoadEarlyFlags(cmd *cobra.Command) error {
 func BindFlags(cmd *cobra.Command) error {
 	return global.BindFlags(cmd)
 }
+
+// Reset will totally clear global
+// ConfigState{}, loading defaults.
+func Reset() {
+	global.Reset()
+}

internal/config/state.go

@@ -37,25 +37,9 @@ type ConfigState struct {
 
 // NewState returns a new initialized ConfigState instance.
 func NewState() *ConfigState {
-	viper := viper.New()
+	st := new(ConfigState)
-
+	st.Reset()
-	// Flag 'some-flag-name' becomes env var 'GTS_SOME_FLAG_NAME'
+	return st
-	viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
-	viper.SetEnvPrefix("gts")
-
-	// Load appropriate named vals from env
-	viper.AutomaticEnv()
-
-	// Create new ConfigState with defaults
-	state := &ConfigState{
-		viper:  viper,
-		config: Defaults,
-	}
-
-	// Perform initial load into viper
-	state.reloadToViper()
-
-	return state
 }
 
 // Config provides safe access to the ConfigState's contained Configuration,
@@ -116,6 +100,32 @@ func (st *ConfigState) Reload() (err error) {
 	return
 }
 
+// Reset will totally clear
+// ConfigState{}, loading defaults.
+func (st *ConfigState) Reset() {
+	// Do within lock.
+	st.mutex.Lock()
+	defer st.mutex.Unlock()
+
+	// Create new viper.
+	viper := viper.New()
+
+	// Flag 'some-flag-name' becomes env var 'GTS_SOME_FLAG_NAME'
+	viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
+	viper.SetEnvPrefix("gts")
+
+	// Load appropriate
+	// named vals from env.
+	viper.AutomaticEnv()
+
+	// Reset variables.
+	st.viper = viper
+	st.config = Defaults
+
+	// Load into viper.
+	st.reloadToViper()
+}
+
 // reloadToViper will reload Configuration{} values into viper.
 func (st *ConfigState) reloadToViper() {
 	raw, err := st.config.MarshalMap()

internal/db/bundb/admin_test.go

@@ -74,6 +74,7 @@ func (suite *AdminTestSuite) TestCreateInstanceAccount() {
 	// we need to take an empty db for this...
 	testrig.StandardDBTeardown(suite.db)
 	// ...with tables created but no data
+	suite.db = testrig.NewTestDB(&suite.state)
 	testrig.CreateTestTables(suite.db)
 
 	// make sure there's no instance account in the db yet

internal/db/bundb/bundb.go

@@ -48,8 +48,6 @@
 	"github.com/uptrace/bun/dialect/pgdialect"
 	"github.com/uptrace/bun/dialect/sqlitedialect"
 	"github.com/uptrace/bun/migrate"
-
-	"modernc.org/sqlite"
 )
 
 // DBService satisfies the DB interface
@@ -133,12 +131,12 @@ func NewBunDBService(ctx context.Context, state *state.State) (db.DB, error) {
 
 	switch t {
 	case "postgres":
-		db, err = pgConn(ctx, state)
+		db, err = pgConn(ctx)
 		if err != nil {
 			return nil, err
 		}
 	case "sqlite":
-		db, err = sqliteConn(ctx, state)
+		db, err = sqliteConn(ctx)
 		if err != nil {
 			return nil, err
 		}
@@ -295,7 +293,7 @@ func NewBunDBService(ctx context.Context, state *state.State) (db.DB, error) {
 	return ps, nil
 }
 
-func pgConn(ctx context.Context, state *state.State) (*bun.DB, error) {
+func pgConn(ctx context.Context) (*bun.DB, error) {
 	opts, err := deriveBunDBPGOptions() //nolint:contextcheck
 	if err != nil {
 		return nil, fmt.Errorf("could not create bundb postgres options: %w", err)
@@ -326,7 +324,7 @@ func pgConn(ctx context.Context, state *state.State) (*bun.DB, error) {
 	return db, nil
 }
 
-func sqliteConn(ctx context.Context, state *state.State) (*bun.DB, error) {
+func sqliteConn(ctx context.Context) (*bun.DB, error) {
 	// validate db address has actually been set
 	address := config.GetDbAddress()
 	if address == "" {
@@ -339,9 +337,6 @@ func sqliteConn(ctx context.Context, state *state.State) (*bun.DB, error) {
 	// Open new DB instance
 	sqldb, err := sql.Open("sqlite-gts", address)
 	if err != nil {
-		if errWithCode, ok := err.(*sqlite.Error); ok {
-			err = errors.New(sqlite.ErrorCodeString[errWithCode.Code()])
-		}
 		return nil, fmt.Errorf("could not open sqlite db with address %s: %w", address, err)
 	}
 
@@ -356,11 +351,9 @@ func sqliteConn(ctx context.Context, state *state.State) (*bun.DB, error) {
 
 	// ping to check the db is there and listening
 	if err := db.PingContext(ctx); err != nil {
-		if errWithCode, ok := err.(*sqlite.Error); ok {
-			err = errors.New(sqlite.ErrorCodeString[errWithCode.Code()])
-		}
 		return nil, fmt.Errorf("sqlite ping: %w", err)
 	}
+
 	log.Infof(ctx, "connected to SQLITE database with address %s", address)
 
 	return db, nil
@@ -528,12 +521,8 @@ func buildSQLiteAddress(addr string) string {
 
 		// Use random name for in-memory instead of ':memory:', so
 		// multiple in-mem databases can be created without conflict.
-		addr = uuid.NewString()
+		addr = "/" + uuid.NewString()
-
+		prefs.Add("vfs", "memdb")
-		// in-mem-specific preferences
-		// (shared cache so that tests don't fail)
-		prefs.Add("mode", "memory")
-		prefs.Add("cache", "shared")
 	}
 
 	if dur := config.GetDbSqliteBusyTimeout(); dur > 0 {

internal/db/bundb/drivers.go

@@ -18,350 +18,14 @@
 package bundb
 
 import (
-	"context"
 	"database/sql"
-	"database/sql/driver"
-	"time"
-	_ "unsafe" // linkname shenanigans
 
-	pgx "github.com/jackc/pgx/v5/stdlib"
+	"github.com/superseriousbusiness/gotosocial/internal/db/postgres"
-	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/db/sqlite"
-	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
-	"modernc.org/sqlite"
 )
 
-var (
-	// global SQL driver instances.
-	postgresDriver = pgx.GetDefaultDriver()
-	sqliteDriver   = getSQLiteDriver()
-
-	// check the postgres connection
-	// conforms to our conn{} interface.
-	// (note SQLite doesn't export their
-	// conn type, and gets checked in
-	// tests very regularly anywho).
-	_ conn = (*pgx.Conn)(nil)
-)
-
-//go:linkname getSQLiteDriver modernc.org/sqlite.newDriver
-func getSQLiteDriver() *sqlite.Driver
-
 func init() {
-	sql.Register("pgx-gts", &PostgreSQLDriver{})
+	// register our SQL driver implementations.
-	sql.Register("sqlite-gts", &SQLiteDriver{})
+	sql.Register("pgx-gts", &postgres.Driver{})
-}
+	sql.Register("sqlite-gts", &sqlite.Driver{})
-
-// PostgreSQLDriver is our own wrapper around the
-// pgx/stdlib.Driver{} type in order to wrap further
-// SQL driver types with our own err processing.
-type PostgreSQLDriver struct{}
-
-func (d *PostgreSQLDriver) Open(name string) (driver.Conn, error) {
-	c, err := postgresDriver.Open(name)
-	if err != nil {
-		return nil, err
-	}
-	return &PostgreSQLConn{conn: c.(conn)}, nil
-}
-
-type PostgreSQLConn struct{ conn }
-
-func (c *PostgreSQLConn) Begin() (driver.Tx, error) {
-	return c.BeginTx(context.Background(), driver.TxOptions{})
-}
-
-func (c *PostgreSQLConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
-	tx, err := c.conn.BeginTx(ctx, opts)
-	err = processPostgresError(err)
-	if err != nil {
-		return nil, err
-	}
-	return &PostgreSQLTx{tx}, nil
-}
-
-func (c *PostgreSQLConn) Prepare(query string) (driver.Stmt, error) {
-	return c.PrepareContext(context.Background(), query)
-}
-
-func (c *PostgreSQLConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
-	st, err := c.conn.PrepareContext(ctx, query)
-	err = processPostgresError(err)
-	if err != nil {
-		return nil, err
-	}
-	return &PostgreSQLStmt{stmt: st.(stmt)}, nil
-}
-
-func (c *PostgreSQLConn) Exec(query string, args []driver.Value) (driver.Result, error) {
-	return c.ExecContext(context.Background(), query, toNamedValues(args))
-}
-
-func (c *PostgreSQLConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
-	result, err := c.conn.ExecContext(ctx, query, args)
-	err = processPostgresError(err)
-	return result, err
-}
-
-func (c *PostgreSQLConn) Query(query string, args []driver.Value) (driver.Rows, error) {
-	return c.QueryContext(context.Background(), query, toNamedValues(args))
-}
-
-func (c *PostgreSQLConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
-	rows, err := c.conn.QueryContext(ctx, query, args)
-	err = processPostgresError(err)
-	return rows, err
-}
-
-func (c *PostgreSQLConn) Close() error {
-	return c.conn.Close()
-}
-
-type PostgreSQLTx struct{ driver.Tx }
-
-func (tx *PostgreSQLTx) Commit() error {
-	err := tx.Tx.Commit()
-	return processPostgresError(err)
-}
-
-func (tx *PostgreSQLTx) Rollback() error {
-	err := tx.Tx.Rollback()
-	return processPostgresError(err)
-}
-
-type PostgreSQLStmt struct{ stmt }
-
-func (stmt *PostgreSQLStmt) Exec(args []driver.Value) (driver.Result, error) {
-	return stmt.ExecContext(context.Background(), toNamedValues(args))
-}
-
-func (stmt *PostgreSQLStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
-	res, err := stmt.stmt.ExecContext(ctx, args)
-	err = processPostgresError(err)
-	return res, err
-}
-
-func (stmt *PostgreSQLStmt) Query(args []driver.Value) (driver.Rows, error) {
-	return stmt.QueryContext(context.Background(), toNamedValues(args))
-}
-
-func (stmt *PostgreSQLStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
-	rows, err := stmt.stmt.QueryContext(ctx, args)
-	err = processPostgresError(err)
-	return rows, err
-}
-
-// SQLiteDriver is our own wrapper around the
-// sqlite.Driver{} type in order to wrap further
-// SQL driver types with our own functionality,
-// e.g. hooks, retries and err processing.
-type SQLiteDriver struct{}
-
-func (d *SQLiteDriver) Open(name string) (driver.Conn, error) {
-	c, err := sqliteDriver.Open(name)
-	if err != nil {
-		return nil, err
-	}
-	return &SQLiteConn{conn: c.(conn)}, nil
-}
-
-type SQLiteConn struct{ conn }
-
-func (c *SQLiteConn) Begin() (driver.Tx, error) {
-	return c.BeginTx(context.Background(), driver.TxOptions{})
-}
-
-func (c *SQLiteConn) BeginTx(ctx context.Context, opts driver.TxOptions) (tx driver.Tx, err error) {
-	err = retryOnBusy(ctx, func() error {
-		tx, err = c.conn.BeginTx(ctx, opts)
-		err = processSQLiteError(err)
-		return err
-	})
-	if err != nil {
-		return nil, err
-	}
-	return &SQLiteTx{Context: ctx, Tx: tx}, nil
-}
-
-func (c *SQLiteConn) Prepare(query string) (driver.Stmt, error) {
-	return c.PrepareContext(context.Background(), query)
-}
-
-func (c *SQLiteConn) PrepareContext(ctx context.Context, query string) (st driver.Stmt, err error) {
-	err = retryOnBusy(ctx, func() error {
-		st, err = c.conn.PrepareContext(ctx, query)
-		err = processSQLiteError(err)
-		return err
-	})
-	if err != nil {
-		return nil, err
-	}
-	return &SQLiteStmt{st.(stmt)}, nil
-}
-
-func (c *SQLiteConn) Exec(query string, args []driver.Value) (driver.Result, error) {
-	return c.ExecContext(context.Background(), query, toNamedValues(args))
-}
-
-func (c *SQLiteConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (result driver.Result, err error) {
-	err = retryOnBusy(ctx, func() error {
-		result, err = c.conn.ExecContext(ctx, query, args)
-		err = processSQLiteError(err)
-		return err
-	})
-	return
-}
-
-func (c *SQLiteConn) Query(query string, args []driver.Value) (driver.Rows, error) {
-	return c.QueryContext(context.Background(), query, toNamedValues(args))
-}
-
-func (c *SQLiteConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (rows driver.Rows, err error) {
-	err = retryOnBusy(ctx, func() error {
-		rows, err = c.conn.QueryContext(ctx, query, args)
-		err = processSQLiteError(err)
-		return err
-	})
-	return
-}
-
-func (c *SQLiteConn) Close() error {
-	// see: https://www.sqlite.org/pragma.html#pragma_optimize
-	const onClose = "PRAGMA analysis_limit=1000; PRAGMA optimize;"
-	_, _ = c.conn.ExecContext(context.Background(), onClose, nil)
-	return c.conn.Close()
-}
-
-type SQLiteTx struct {
-	context.Context
-	driver.Tx
-}
-
-func (tx *SQLiteTx) Commit() (err error) {
-	err = retryOnBusy(tx.Context, func() error {
-		err = tx.Tx.Commit()
-		err = processSQLiteError(err)
-		return err
-	})
-	return
-}
-
-func (tx *SQLiteTx) Rollback() (err error) {
-	err = retryOnBusy(tx.Context, func() error {
-		err = tx.Tx.Rollback()
-		err = processSQLiteError(err)
-		return err
-	})
-	return
-}
-
-type SQLiteStmt struct{ stmt }
-
-func (stmt *SQLiteStmt) Exec(args []driver.Value) (driver.Result, error) {
-	return stmt.ExecContext(context.Background(), toNamedValues(args))
-}
-
-func (stmt *SQLiteStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (res driver.Result, err error) {
-	err = retryOnBusy(ctx, func() error {
-		res, err = stmt.stmt.ExecContext(ctx, args)
-		err = processSQLiteError(err)
-		return err
-	})
-	return
-}
-
-func (stmt *SQLiteStmt) Query(args []driver.Value) (driver.Rows, error) {
-	return stmt.QueryContext(context.Background(), toNamedValues(args))
-}
-
-func (stmt *SQLiteStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (rows driver.Rows, err error) {
-	err = retryOnBusy(ctx, func() error {
-		rows, err = stmt.stmt.QueryContext(ctx, args)
-		err = processSQLiteError(err)
-		return err
-	})
-	return
-}
-
-type conn interface {
-	driver.Conn
-	driver.ConnPrepareContext
-	driver.ExecerContext
-	driver.QueryerContext
-	driver.ConnBeginTx
-}
-
-type stmt interface {
-	driver.Stmt
-	driver.StmtExecContext
-	driver.StmtQueryContext
-}
-
-// retryOnBusy will retry given function on returned 'errBusy'.
-func retryOnBusy(ctx context.Context, fn func() error) error {
-	if err := fn(); err != errBusy {
-		return err
-	}
-	return retryOnBusySlow(ctx, fn)
-}
-
-// retryOnBusySlow is the outlined form of retryOnBusy, to allow the fast path (i.e. only
-// 1 attempt) to be inlined, leaving the slow retry loop to be a separate function call.
-func retryOnBusySlow(ctx context.Context, fn func() error) error {
-	var backoff time.Duration
-
-	for i := 0; ; i++ {
-		// backoff according to a multiplier of 2ms * 2^2n,
-		// up to a maximum possible backoff time of 5 minutes.
-		//
-		// this works out as the following:
-		// 4ms
-		// 16ms
-		// 64ms
-		// 256ms
-		// 1.024s
-		// 4.096s
-		// 16.384s
-		// 1m5.536s
-		// 4m22.144s
-		backoff = 2 * time.Millisecond * (1 << (2*i + 1))
-		if backoff >= 5*time.Minute {
-			break
-		}
-
-		select {
-		// Context cancelled.
-		case <-ctx.Done():
-			return ctx.Err()
-
-		// Backoff for some time.
-		case <-time.After(backoff):
-		}
-
-		// Perform func.
-		err := fn()
-
-		if err != errBusy {
-			// May be nil, or may be
-			// some other error, either
-			// way return here.
-			return err
-		}
-	}
-
-	return gtserror.Newf("%w (waited > %s)", db.ErrBusyTimeout, backoff)
-}
-
-// toNamedValues converts older driver.Value types to driver.NamedValue types.
-func toNamedValues(args []driver.Value) []driver.NamedValue {
-	if args == nil {
-		return nil
-	}
-	args2 := make([]driver.NamedValue, len(args))
-	for i := range args {
-		args2[i] = driver.NamedValue{
-			Ordinal: i + 1,
-			Value:   args[i],
-		}
-	}
-	return args2
 }

internal/db/bundb/errors.go

@@ -1,105 +0,0 @@
-// GoToSocial
-// Copyright (C) GoToSocial Authors admin@gotosocial.org
-// SPDX-License-Identifier: AGPL-3.0-or-later
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
-//
-// You should have received a copy of the GNU Affero General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-package bundb
-
-import (
-	"database/sql/driver"
-	"errors"
-
-	"github.com/jackc/pgx/v5/pgconn"
-	"github.com/superseriousbusiness/gotosocial/internal/db"
-	"modernc.org/sqlite"
-	sqlite3 "modernc.org/sqlite/lib"
-)
-
-// errBusy is a sentinel error indicating
-// busy database (e.g. retry needed).
-var errBusy = errors.New("busy")
-
-// processPostgresError processes an error, replacing any postgres specific errors with our own error type
-func processPostgresError(err error) error {
-	// Catch nil errs.
-	if err == nil {
-		return nil
-	}
-
-	// Attempt to cast as postgres
-	pgErr, ok := err.(*pgconn.PgError)
-	if !ok {
-		return err
-	}
-
-	// Handle supplied error code:
-	// (https://www.postgresql.org/docs/10/errcodes-appendix.html)
-	switch pgErr.Code { //nolint
-	case "23505" /* unique_violation */ :
-		return db.ErrAlreadyExists
-	}
-
-	return err
-}
-
-// processSQLiteError processes an error, replacing any sqlite specific errors with our own error type
-func processSQLiteError(err error) error {
-	// Catch nil errs.
-	if err == nil {
-		return nil
-	}
-
-	// Attempt to cast as sqlite
-	sqliteErr, ok := err.(*sqlite.Error)
-	if !ok {
-		return err
-	}
-
-	// Handle supplied error code:
-	switch sqliteErr.Code() {
-	case sqlite3.SQLITE_CONSTRAINT_UNIQUE,
-		sqlite3.SQLITE_CONSTRAINT_PRIMARYKEY:
-		return db.ErrAlreadyExists
-	case sqlite3.SQLITE_BUSY,
-		sqlite3.SQLITE_BUSY_SNAPSHOT,
-		sqlite3.SQLITE_BUSY_RECOVERY:
-		return errBusy
-	case sqlite3.SQLITE_BUSY_TIMEOUT:
-		return db.ErrBusyTimeout
-
-	// WORKAROUND:
-	// text copied from matrix dev chat:
-	//
-	// okay i've found a workaround for now. so between
-	// v1.29.0 and v1.29.2 (modernc.org/sqlite) is that
-	// slightly tweaked interruptOnDone() behaviour, which
-	// causes interrupt to (imo, correctly) get called when
-	// a context is cancelled to cancel the running query. the
-	// issue is that every single query after that point seems
-	// to still then return interrupted. so as you thought,
-	// maybe that query count isn't being decremented. i don't
-	// think it's our code, but i haven't ruled it out yet.
-	//
-	// the workaround for now is adding to our sqlite error
-	// processor to replace an SQLITE_INTERRUPTED code with
-	// driver.ErrBadConn, which hints to the golang sql package
-	// that the conn needs to be closed and a new one opened
-	//
-	case sqlite3.SQLITE_INTERRUPT:
-		return driver.ErrBadConn
-	}
-
-	return err
-}

internal/db/bundb/tag_test.go

@@ -19,6 +19,7 @@
 
 import (
 	"context"
+	"errors"
 	"testing"
 
 	"github.com/stretchr/testify/suite"
@@ -82,10 +83,20 @@ func (suite *TagTestSuite) TestPutTag() {
 
 		// Subsequent inserts should fail
 		// since all these tags are equivalent.
-		suite.ErrorIs(err, db.ErrAlreadyExists)
+		if !suite.ErrorIs(err, db.ErrAlreadyExists) {
+			suite.T().Logf("%T(%v) %v", err, err, unwrap(err))
+		}
 	}
 }
 
 func TestTagTestSuite(t *testing.T) {
 	suite.Run(t, new(TagTestSuite))
 }
+
+func unwrap(err error) (errs []error) {
+	for err != nil {
+		errs = append(errs, err)
+		err = errors.Unwrap(err)
+	}
+	return
+}

internal/db/error.go

@@ -29,8 +29,4 @@
 
 	// ErrAlreadyExists is returned when a conflict was encountered in the db when doing an insert.
 	ErrAlreadyExists = errors.New("already exists")
-
-	// ErrBusyTimeout is returned if the database connection indicates the connection is too busy
-	// to complete the supplied query. This is generally intended to be handled internally by the DB.
-	ErrBusyTimeout = errors.New("busy timeout")
 )

internal/db/postgres/driver.go

@@ -0,0 +1,209 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package postgres
+
+import (
+	"context"
+	"database/sql/driver"
+
+	pgx "github.com/jackc/pgx/v5/stdlib"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+)
+
+var (
+	// global PostgreSQL driver instances.
+	postgresDriver = pgx.GetDefaultDriver().(*pgx.Driver)
+
+	// check the postgres driver types
+	// conforms to our interface types.
+	// (note SQLite doesn't export their
+	// driver types, and gets checked in
+	// tests very regularly anywho).
+	_ connIface = (*pgx.Conn)(nil)
+	_ stmtIface = (*pgx.Stmt)(nil)
+	_ rowsIface = (*pgx.Rows)(nil)
+)
+
+// Driver is our own wrapper around the
+// pgx/stdlib.Driver{} type in order to wrap further
+// SQL driver types with our own err processing.
+type Driver struct{}
+
+func (d *Driver) Open(name string) (driver.Conn, error) {
+	conn, err := postgresDriver.Open(name)
+	if err != nil {
+		err = processPostgresError(err)
+		return nil, err
+	}
+	return &postgresConn{conn.(connIface)}, nil
+}
+
+func (d *Driver) OpenConnector(name string) (driver.Connector, error) {
+	cc, err := postgresDriver.OpenConnector(name)
+	if err != nil {
+		err = processPostgresError(err)
+		return nil, err
+	}
+	return &postgresConnector{driver: d, Connector: cc}, nil
+}
+
+type postgresConnector struct {
+	driver *Driver
+	driver.Connector
+}
+
+func (c *postgresConnector) Driver() driver.Driver { return c.driver }
+
+func (c *postgresConnector) Connect(ctx context.Context) (driver.Conn, error) {
+	conn, err := c.Connector.Connect(ctx)
+	if err != nil {
+		err = processPostgresError(err)
+		return nil, err
+	}
+	return &postgresConn{conn.(connIface)}, nil
+}
+
+type postgresConn struct{ connIface }
+
+func (c *postgresConn) Begin() (driver.Tx, error) {
+	return c.BeginTx(context.Background(), driver.TxOptions{})
+}
+
+func (c *postgresConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
+	tx, err := c.connIface.BeginTx(ctx, opts)
+	err = processPostgresError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &postgresTx{tx}, nil
+}
+
+func (c *postgresConn) Prepare(query string) (driver.Stmt, error) {
+	return c.PrepareContext(context.Background(), query)
+}
+
+func (c *postgresConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
+	st, err := c.connIface.PrepareContext(ctx, query)
+	err = processPostgresError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &postgresStmt{st.(stmtIface)}, nil
+}
+
+func (c *postgresConn) Exec(query string, args []driver.Value) (driver.Result, error) {
+	return c.ExecContext(context.Background(), query, db.ToNamedValues(args))
+}
+
+func (c *postgresConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
+	result, err := c.connIface.ExecContext(ctx, query, args)
+	err = processPostgresError(err)
+	return result, err
+}
+
+func (c *postgresConn) Query(query string, args []driver.Value) (driver.Rows, error) {
+	return c.QueryContext(context.Background(), query, db.ToNamedValues(args))
+}
+
+func (c *postgresConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
+	rows, err := c.connIface.QueryContext(ctx, query, args)
+	err = processPostgresError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &postgresRows{rows.(rowsIface)}, nil
+}
+
+func (c *postgresConn) Close() error {
+	err := c.connIface.Close()
+	return processPostgresError(err)
+}
+
+type postgresTx struct{ driver.Tx }
+
+func (tx *postgresTx) Commit() error {
+	err := tx.Tx.Commit()
+	return processPostgresError(err)
+}
+
+func (tx *postgresTx) Rollback() error {
+	err := tx.Tx.Rollback()
+	return processPostgresError(err)
+}
+
+type postgresStmt struct{ stmtIface }
+
+func (stmt *postgresStmt) Exec(args []driver.Value) (driver.Result, error) {
+	return stmt.ExecContext(context.Background(), db.ToNamedValues(args))
+}
+
+func (stmt *postgresStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
+	res, err := stmt.stmtIface.ExecContext(ctx, args)
+	err = processPostgresError(err)
+	return res, err
+}
+
+func (stmt *postgresStmt) Query(args []driver.Value) (driver.Rows, error) {
+	return stmt.QueryContext(context.Background(), db.ToNamedValues(args))
+}
+
+func (stmt *postgresStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
+	rows, err := stmt.stmtIface.QueryContext(ctx, args)
+	err = processPostgresError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &postgresRows{rows.(rowsIface)}, nil
+}
+
+type postgresRows struct{ rowsIface }
+
+func (r *postgresRows) Next(dest []driver.Value) error {
+	err := r.rowsIface.Next(dest)
+	err = processPostgresError(err)
+	return err
+}
+
+func (r *postgresRows) Close() error {
+	err := r.rowsIface.Close()
+	err = processPostgresError(err)
+	return err
+}
+
+type connIface interface {
+	driver.Conn
+	driver.ConnPrepareContext
+	driver.ExecerContext
+	driver.QueryerContext
+	driver.ConnBeginTx
+}
+
+type stmtIface interface {
+	driver.Stmt
+	driver.StmtExecContext
+	driver.StmtQueryContext
+}
+
+type rowsIface interface {
+	driver.Rows
+	driver.RowsColumnTypeDatabaseTypeName
+	driver.RowsColumnTypeLength
+	driver.RowsColumnTypePrecisionScale
+	driver.RowsColumnTypeScanType
+	driver.RowsColumnTypeScanType
+}

internal/db/postgres/errors.go

@@ -0,0 +1,46 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package postgres
+
+import (
+	"fmt"
+
+	"github.com/jackc/pgx/v5/pgconn"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+)
+
+// processPostgresError processes an error, replacing any
+// postgres specific errors with our own error type
+func processPostgresError(err error) error {
+	// Attempt to cast as postgres
+	pgErr, ok := err.(*pgconn.PgError)
+	if !ok {
+		return err
+	}
+
+	// Handle supplied error code:
+	// (https://www.postgresql.org/docs/10/errcodes-appendix.html)
+	switch pgErr.Code { //nolint
+	case "23505" /* unique_violation */ :
+		return db.ErrAlreadyExists
+	}
+
+	// Wrap the returned error with the code and
+	// extended code for easier debugging later.
+	return fmt.Errorf("%w (code=%s)", err, pgErr.Code)
+}

internal/db/sqlite/driver.go

@@ -0,0 +1,197 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+//go:build !wasmsqlite3
+
+package sqlite
+
+import (
+	"context"
+	"database/sql/driver"
+
+	"modernc.org/sqlite"
+
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+)
+
+// Driver is our own wrapper around the
+// sqlite.Driver{} type in order to wrap
+// further SQL types with our own
+// functionality, e.g. err processing.
+type Driver struct{ sqlite.Driver }
+
+func (d *Driver) Open(name string) (driver.Conn, error) {
+	conn, err := d.Driver.Open(name)
+	if err != nil {
+		err = processSQLiteError(err)
+		return nil, err
+	}
+	return &sqliteConn{conn.(connIface)}, nil
+}
+
+type sqliteConn struct{ connIface }
+
+func (c *sqliteConn) Begin() (driver.Tx, error) {
+	return c.BeginTx(context.Background(), driver.TxOptions{})
+}
+
+func (c *sqliteConn) BeginTx(ctx context.Context, opts driver.TxOptions) (tx driver.Tx, err error) {
+	tx, err = c.connIface.BeginTx(ctx, opts)
+	err = processSQLiteError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &sqliteTx{tx}, nil
+}
+
+func (c *sqliteConn) Prepare(query string) (driver.Stmt, error) {
+	return c.PrepareContext(context.Background(), query)
+}
+
+func (c *sqliteConn) PrepareContext(ctx context.Context, query string) (stmt driver.Stmt, err error) {
+	stmt, err = c.connIface.PrepareContext(ctx, query)
+	err = processSQLiteError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &sqliteStmt{stmtIface: stmt.(stmtIface)}, nil
+}
+
+func (c *sqliteConn) Exec(query string, args []driver.Value) (driver.Result, error) {
+	return c.ExecContext(context.Background(), query, db.ToNamedValues(args))
+}
+
+func (c *sqliteConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (res driver.Result, err error) {
+	res, err = c.connIface.ExecContext(ctx, query, args)
+	err = processSQLiteError(err)
+	return
+}
+
+func (c *sqliteConn) Query(query string, args []driver.Value) (driver.Rows, error) {
+	return c.QueryContext(context.Background(), query, db.ToNamedValues(args))
+}
+
+func (c *sqliteConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (rows driver.Rows, err error) {
+	rows, err = c.connIface.QueryContext(ctx, query, args)
+	err = processSQLiteError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &sqliteRows{rows.(rowsIface)}, nil
+}
+
+func (c *sqliteConn) Close() (err error) {
+	// see: https://www.sqlite.org/pragma.html#pragma_optimize
+	const onClose = "PRAGMA analysis_limit=1000; PRAGMA optimize;"
+	_, _ = c.connIface.ExecContext(context.Background(), onClose, nil)
+
+	// Finally, close the conn.
+	err = c.connIface.Close()
+	return
+}
+
+type sqliteTx struct{ driver.Tx }
+
+func (tx *sqliteTx) Commit() (err error) {
+	err = tx.Tx.Commit()
+	err = processSQLiteError(err)
+	return
+}
+
+func (tx *sqliteTx) Rollback() (err error) {
+	err = tx.Tx.Rollback()
+	err = processSQLiteError(err)
+	return
+}
+
+type sqliteStmt struct{ stmtIface }
+
+func (stmt *sqliteStmt) Exec(args []driver.Value) (driver.Result, error) {
+	return stmt.ExecContext(context.Background(), db.ToNamedValues(args))
+}
+
+func (stmt *sqliteStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (res driver.Result, err error) {
+	res, err = stmt.stmtIface.ExecContext(ctx, args)
+	err = processSQLiteError(err)
+	return
+}
+
+func (stmt *sqliteStmt) Query(args []driver.Value) (driver.Rows, error) {
+	return stmt.QueryContext(context.Background(), db.ToNamedValues(args))
+}
+
+func (stmt *sqliteStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (rows driver.Rows, err error) {
+	rows, err = stmt.stmtIface.QueryContext(ctx, args)
+	err = processSQLiteError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &sqliteRows{rows.(rowsIface)}, nil
+}
+
+func (stmt *sqliteStmt) Close() (err error) {
+	err = stmt.stmtIface.Close()
+	err = processSQLiteError(err)
+	return
+}
+
+type sqliteRows struct{ rowsIface }
+
+func (r *sqliteRows) Next(dest []driver.Value) (err error) {
+	err = r.rowsIface.Next(dest)
+	err = processSQLiteError(err)
+	return
+}
+
+func (r *sqliteRows) Close() (err error) {
+	err = r.rowsIface.Close()
+	err = processSQLiteError(err)
+	return
+}
+
+// connIface is the driver.Conn interface
+// types (and the like) that modernc.org/sqlite.conn
+// conforms to. Useful so you don't need
+// to repeatedly perform checks yourself.
+type connIface interface {
+	driver.Conn
+	driver.ConnBeginTx
+	driver.ConnPrepareContext
+	driver.ExecerContext
+	driver.QueryerContext
+}
+
+// StmtIface is the driver.Stmt interface
+// types (and the like) that modernc.org/sqlite.stmt
+// conforms to. Useful so you don't need
+// to repeatedly perform checks yourself.
+type stmtIface interface {
+	driver.Stmt
+	driver.StmtExecContext
+	driver.StmtQueryContext
+}
+
+// RowsIface is the driver.Rows interface
+// types (and the like) that modernc.org/sqlite.rows
+// conforms to. Useful so you don't need
+// to repeatedly perform checks yourself.
+type rowsIface interface {
+	driver.Rows
+	driver.RowsColumnTypeDatabaseTypeName
+	driver.RowsColumnTypeLength
+	driver.RowsColumnTypeScanType
+}

internal/db/sqlite/driver_wasmsqlite3.go

@@ -0,0 +1,211 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+//go:build wasmsqlite3
+
+package sqlite
+
+import (
+	"context"
+	"database/sql/driver"
+
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+
+	"github.com/ncruces/go-sqlite3"
+	sqlite3driver "github.com/ncruces/go-sqlite3/driver"
+	_ "github.com/ncruces/go-sqlite3/embed"     // embed wasm binary
+	_ "github.com/ncruces/go-sqlite3/vfs/memdb" // include memdb vfs
+)
+
+// Driver is our own wrapper around the
+// driver.SQLite{} type in order to wrap
+// further SQL types with our own
+// functionality, e.g. err processing.
+type Driver struct{ sqlite3driver.SQLite }
+
+func (d *Driver) Open(name string) (driver.Conn, error) {
+	conn, err := d.SQLite.Open(name)
+	if err != nil {
+		err = processSQLiteError(err)
+		return nil, err
+	}
+	return &sqliteConn{conn.(connIface)}, nil
+}
+
+func (d *Driver) OpenConnector(name string) (driver.Connector, error) {
+	cc, err := d.SQLite.OpenConnector(name)
+	if err != nil {
+		return nil, err
+	}
+	return &sqliteConnector{driver: d, Connector: cc}, nil
+}
+
+type sqliteConnector struct {
+	driver *Driver
+	driver.Connector
+}
+
+func (c *sqliteConnector) Driver() driver.Driver { return c.driver }
+
+func (c *sqliteConnector) Connect(ctx context.Context) (driver.Conn, error) {
+	conn, err := c.Connector.Connect(ctx)
+	err = processSQLiteError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &sqliteConn{conn.(connIface)}, nil
+}
+
+type sqliteConn struct{ connIface }
+
+func (c *sqliteConn) Begin() (driver.Tx, error) {
+	return c.BeginTx(context.Background(), driver.TxOptions{})
+}
+
+func (c *sqliteConn) BeginTx(ctx context.Context, opts driver.TxOptions) (tx driver.Tx, err error) {
+	tx, err = c.connIface.BeginTx(ctx, opts)
+	err = processSQLiteError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &sqliteTx{tx}, nil
+}
+
+func (c *sqliteConn) Prepare(query string) (driver.Stmt, error) {
+	return c.PrepareContext(context.Background(), query)
+}
+
+func (c *sqliteConn) PrepareContext(ctx context.Context, query string) (stmt driver.Stmt, err error) {
+	stmt, err = c.connIface.PrepareContext(ctx, query)
+	err = processSQLiteError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &sqliteStmt{stmtIface: stmt.(stmtIface)}, nil
+}
+
+func (c *sqliteConn) Exec(query string, args []driver.Value) (driver.Result, error) {
+	return c.ExecContext(context.Background(), query, db.ToNamedValues(args))
+}
+
+func (c *sqliteConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (res driver.Result, err error) {
+	res, err = c.connIface.ExecContext(ctx, query, args)
+	err = processSQLiteError(err)
+	return
+}
+
+func (c *sqliteConn) Close() (err error) {
+	// Get acces the underlying raw sqlite3 conn.
+	raw := c.connIface.(sqlite3.DriverConn).Raw()
+
+	// see: https://www.sqlite.org/pragma.html#pragma_optimize
+	const onClose = "PRAGMA analysis_limit=1000; PRAGMA optimize;"
+	_ = raw.Exec(onClose)
+
+	// Finally, close.
+	err = raw.Close()
+	return
+}
+
+type sqliteTx struct{ driver.Tx }
+
+func (tx *sqliteTx) Commit() (err error) {
+	err = tx.Tx.Commit()
+	err = processSQLiteError(err)
+	return
+}
+
+func (tx *sqliteTx) Rollback() (err error) {
+	err = tx.Tx.Rollback()
+	err = processSQLiteError(err)
+	return
+}
+
+type sqliteStmt struct{ stmtIface }
+
+func (stmt *sqliteStmt) Exec(args []driver.Value) (driver.Result, error) {
+	return stmt.ExecContext(context.Background(), db.ToNamedValues(args))
+}
+
+func (stmt *sqliteStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (res driver.Result, err error) {
+	res, err = stmt.stmtIface.ExecContext(ctx, args)
+	err = processSQLiteError(err)
+	return
+}
+
+func (stmt *sqliteStmt) Query(args []driver.Value) (driver.Rows, error) {
+	return stmt.QueryContext(context.Background(), db.ToNamedValues(args))
+}
+
+func (stmt *sqliteStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (rows driver.Rows, err error) {
+	rows, err = stmt.stmtIface.QueryContext(ctx, args)
+	err = processSQLiteError(err)
+	if err != nil {
+		return nil, err
+	}
+	return &sqliteRows{rows.(rowsIface)}, nil
+}
+
+func (stmt *sqliteStmt) Close() (err error) {
+	err = stmt.stmtIface.Close()
+	err = processSQLiteError(err)
+	return
+}
+
+type sqliteRows struct{ rowsIface }
+
+func (r *sqliteRows) Next(dest []driver.Value) (err error) {
+	err = r.rowsIface.Next(dest)
+	err = processSQLiteError(err)
+	return
+}
+
+func (r *sqliteRows) Close() (err error) {
+	err = r.rowsIface.Close()
+	err = processSQLiteError(err)
+	return
+}
+
+// connIface is the driver.Conn interface
+// types (and the like) that go-sqlite3/driver.conn
+// conforms to. Useful so you don't need
+// to repeatedly perform checks yourself.
+type connIface interface {
+	driver.Conn
+	driver.ConnBeginTx
+	driver.ConnPrepareContext
+	driver.ExecerContext
+}
+
+// StmtIface is the driver.Stmt interface
+// types (and the like) that go-sqlite3/driver.stmt
+// conforms to. Useful so you don't need
+// to repeatedly perform checks yourself.
+type stmtIface interface {
+	driver.Stmt
+	driver.StmtExecContext
+	driver.StmtQueryContext
+}
+
+// RowsIface is the driver.Rows interface
+// types (and the like) that go-sqlite3/driver.rows
+// conforms to. Useful so you don't need
+// to repeatedly perform checks yourself.
+type rowsIface interface {
+	driver.Rows
+	driver.RowsColumnTypeDatabaseTypeName
+}

internal/db/sqlite/errors.go

@@ -0,0 +1,62 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+//go:build !wasmsqlite3
+
+package sqlite
+
+import (
+	"database/sql/driver"
+	"fmt"
+
+	"modernc.org/sqlite"
+	sqlite3 "modernc.org/sqlite/lib"
+
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+)
+
+// processSQLiteError processes an sqlite3.Error to
+// handle conversion to any of our common db types.
+func processSQLiteError(err error) error {
+	// Attempt to cast as sqlite error.
+	sqliteErr, ok := err.(*sqlite.Error)
+	if !ok {
+		return err
+	}
+
+	// Handle supplied error code:
+	switch sqliteErr.Code() {
+	case sqlite3.SQLITE_CONSTRAINT_UNIQUE,
+		sqlite3.SQLITE_CONSTRAINT_PRIMARYKEY:
+		return db.ErrAlreadyExists
+
+	// Busy should be very rare, but
+	// on busy tell the database to close
+	// the connection, re-open and re-attempt
+	// which should give a necessary timeout.
+	case sqlite3.SQLITE_BUSY,
+		sqlite3.SQLITE_BUSY_RECOVERY,
+		sqlite3.SQLITE_BUSY_SNAPSHOT:
+		return driver.ErrBadConn
+	}
+
+	// Wrap the returned error with the code and
+	// extended code for easier debugging later.
+	return fmt.Errorf("%w (code=%d)", err,
+		sqliteErr.Code(),
+	)
+}

internal/db/sqlite/errors_wasmsqlite3.go

@@ -0,0 +1,60 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+//go:build wasmsqlite3
+
+package sqlite
+
+import (
+	"database/sql/driver"
+	"fmt"
+
+	"github.com/ncruces/go-sqlite3"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+)
+
+// processSQLiteError processes an sqlite3.Error to
+// handle conversion to any of our common db types.
+func processSQLiteError(err error) error {
+	// Attempt to cast as sqlite error.
+	sqliteErr, ok := err.(*sqlite3.Error)
+	if !ok {
+		return err
+	}
+
+	// Handle supplied error code:
+	switch sqliteErr.ExtendedCode() {
+	case sqlite3.CONSTRAINT_UNIQUE,
+		sqlite3.CONSTRAINT_PRIMARYKEY:
+		return db.ErrAlreadyExists
+
+	// Busy should be very rare, but on
+	// busy tell the database to close the
+	// connection, re-open and re-attempt
+	// which should give necessary timeout.
+	case sqlite3.BUSY_RECOVERY,
+		sqlite3.BUSY_SNAPSHOT:
+		return driver.ErrBadConn
+	}
+
+	// Wrap the returned error with the code and
+	// extended code for easier debugging later.
+	return fmt.Errorf("%w (code=%d extended=%d)", err,
+		sqliteErr.Code(),
+		sqliteErr.ExtendedCode(),
+	)
+}

internal/db/util.go

@@ -0,0 +1,35 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package db
+
+import "database/sql/driver"
+
+// ToNamedValues converts older driver.Value types to driver.NamedValue types.
+func ToNamedValues(args []driver.Value) []driver.NamedValue {
+	if args == nil {
+		return nil
+	}
+	args2 := make([]driver.NamedValue, len(args))
+	for i := range args {
+		args2[i] = driver.NamedValue{
+			Ordinal: i + 1,
+			Value:   args[i],
+		}
+	}
+	return args2
+}

internal/gtserror/multi_test.go

@@ -43,10 +43,6 @@ func TestMultiError(t *testing.T) {
 		t.Error("should be db.ErrAlreadyExists")
 	}
 
-	if errors.Is(err, db.ErrBusyTimeout) {
-		t.Error("should not be db.ErrBusyTimeout")
-	}
-
 	errString := err.Error()
 	expected := `sql: no rows in result set
 oopsie woopsie we did a fucky wucky etc

internal/util/paging_test.go

@@ -30,6 +30,7 @@ type PagingSuite struct {
 }
 
 func (suite *PagingSuite) TestPagingStandard() {
+	config.SetProtocol("https")
 	config.SetHost("example.org")
 
 	params := util.PageableResponseParams{
@@ -52,6 +53,7 @@ func (suite *PagingSuite) TestPagingStandard() {
 }
 
 func (suite *PagingSuite) TestPagingNoLimit() {
+	config.SetProtocol("https")
 	config.SetHost("example.org")
 
 	params := util.PageableResponseParams{
@@ -73,6 +75,7 @@ func (suite *PagingSuite) TestPagingNoLimit() {
 }
 
 func (suite *PagingSuite) TestPagingNoNextID() {
+	config.SetProtocol("https")
 	config.SetHost("example.org")
 
 	params := util.PageableResponseParams{
@@ -94,6 +97,7 @@ func (suite *PagingSuite) TestPagingNoNextID() {
 }
 
 func (suite *PagingSuite) TestPagingNoPrevID() {
+	config.SetProtocol("https")
 	config.SetHost("example.org")
 
 	params := util.PageableResponseParams{
@@ -115,6 +119,7 @@ func (suite *PagingSuite) TestPagingNoPrevID() {
 }
 
 func (suite *PagingSuite) TestPagingNoItems() {
+	config.SetProtocol("https")
 	config.SetHost("example.org")
 
 	params := util.PageableResponseParams{

test/run-postgres.sh

@@ -2,6 +2,11 @@
 
 set -e
 
+# Determine available docker binary
+_docker=$(command -v 'podman') || \
+_docker=$(command -v 'docker') || \
+{ echo 'docker not found'; exit 1; }
+
 # Ensure test args are set.
 ARGS=${@}; [ -z "$ARGS" ] && \
 ARGS='./...'
@@ -10,33 +15,32 @@ ARGS='./...'
 DB_NAME='postgres'
 DB_USER='postgres'
 DB_PASS='postgres'
+DB_IP='127.0.0.1'
 DB_PORT=5432
 
 # Start postgres container
-CID=$(docker run --detach \
+CID=$($_docker run --detach \
+    --publish "${DB_IP}:${DB_PORT}:${DB_PORT}" \
     --env "POSTGRES_DB=${DB_NAME}" \
     --env "POSTGRES_USER=${DB_USER}" \
     --env "POSTGRES_PASSWORD=${DB_PASS}" \
     --env "POSTGRES_HOST_AUTH_METHOD=trust" \
     --env "PGHOST=0.0.0.0" \
     --env "PGPORT=${DB_PORT}" \
-    'postgres:latest')
+    'docker.io/postgres:latest')
 
 # On exit kill the container
-trap "docker kill ${CID}" exit
+trap "$_docker kill ${CID}" exit
 
 sleep 5
 #docker exec "$CID" psql --user "$DB_USER" --password "$DB_PASS" -c "CREATE DATABASE \"${DB_NAME}\" WITH LOCALE \"C.UTF-8\" TEMPLATE \"template0\";"
-docker exec "$CID" psql --user "$DB_USER" --password "$DB_PASS" -c "GRANT ALL PRIVILEGES ON DATABASE \"${DB_NAME}\" TO \"${DB_USER}\";"
+$_docker exec "$CID" psql --user "$DB_USER" --password "$DB_PASS" -c "GRANT ALL PRIVILEGES ON DATABASE \"${DB_NAME}\" TO \"${DB_USER}\";"
-
-# Get running container IP
-IP=$(docker container inspect "${CID}" \
-    --format '{{ .NetworkSettings.IPAddress }}')
 
+env \
 GTS_DB_TYPE=postgres \
-GTS_DB_ADDRESS=${IP} \
+GTS_DB_ADDRESS=${DB_IP} \
 GTS_DB_PORT=${DB_PORT} \
 GTS_DB_USER=${DB_USER} \
 GTS_DB_PASSWORD=${DB_PASS} \
 GTS_DB_DATABASE=${DB_NAME} \
-go test ./... -p 1 ${ARGS}
+go test -p 1 ${ARGS}

testrig/config.go

@@ -18,8 +18,8 @@
 package testrig
 
 import (
-	"cmp"
 	"os"
+	"strconv"
 	"time"
 
 	"codeberg.org/gruf/go-bytesize"
@@ -28,128 +28,149 @@
 	"github.com/superseriousbusiness/gotosocial/internal/language"
 )
 
-// InitTestConfig initializes viper configuration with test defaults.
+// InitTestConfig initializes viper
+// configuration with test defaults.
 func InitTestConfig() {
-	config.Config(func(cfg *config.Configuration) {
+	config.Defaults = testDefaults()
-		*cfg = testDefaults
+	config.Reset()
+}
+
+func testDefaults() config.Configuration {
+	return config.Configuration{
+		LogLevel:                 envStr("GTS_LOG_LEVEL", "error"),
+		LogTimestampFormat:       "02/01/2006 15:04:05.000",
+		LogDbQueries:             true,
+		ApplicationName:          "gotosocial",
+		LandingPageUser:          "",
+		ConfigPath:               "",
+		Host:                     "localhost:8080",
+		AccountDomain:            "localhost:8080",
+		Protocol:                 "http",
+		BindAddress:              "127.0.0.1",
+		Port:                     8080,
+		TrustedProxies:           []string{"127.0.0.1/32", "::1"},
+		DbType:                   envStr("GTS_DB_TYPE", "sqlite"),
+		DbAddress:                envStr("GTS_DB_ADDRESS", ":memory:"),
+		DbPort:                   envInt("GTS_DB_PORT", 0),
+		DbUser:                   envStr("GTS_DB_USER", ""),
+		DbPassword:               envStr("GTS_DB_PASSWORD", ""),
+		DbDatabase:               envStr("GTS_DB_DATABASE", ""),
+		DbTLSMode:                envStr("GTS_DB_TLS_MODE", ""),
+		DbTLSCACert:              envStr("GTS_DB_TLS_CA_CERT", ""),
+		DbMaxOpenConnsMultiplier: 8,
+		DbSqliteJournalMode:      "WAL",
+		DbSqliteSynchronous:      "NORMAL",
+		DbSqliteCacheSize:        8 * bytesize.MiB,
+		DbSqliteBusyTimeout:      time.Minute * 5,
+
+		WebTemplateBaseDir: "./web/template/",
+		WebAssetBaseDir:    "./web/assets/",
+
+		InstanceFederationMode:         config.InstanceFederationModeDefault,
+		InstanceFederationSpamFilter:   true,
+		InstanceExposePeers:            true,
+		InstanceExposeSuspended:        true,
+		InstanceExposeSuspendedWeb:     true,
+		InstanceDeliverToSharedInboxes: true,
+		InstanceLanguages: language.Languages{
+			{
+				TagStr: "nl",
+			},
+			{
+				TagStr: "en-gb",
+			},
+		},
+
+		AccountsRegistrationOpen: true,
+		AccountsReasonRequired:   true,
+		AccountsAllowCustomCSS:   true,
+		AccountsCustomCSSLength:  10000,
+
+		MediaImageMaxSize:        10485760, // 10MiB
+		MediaVideoMaxSize:        41943040, // 40MiB
+		MediaDescriptionMinChars: 0,
+		MediaDescriptionMaxChars: 500,
+		MediaRemoteCacheDays:     7,
+		MediaEmojiLocalMaxSize:   51200,          // 50KiB
+		MediaEmojiRemoteMaxSize:  102400,         // 100KiB
+		MediaCleanupFrom:         "00:00",        // midnight.
+		MediaCleanupEvery:        24 * time.Hour, // 1/day.
+
+		// the testrig only uses in-memory storage, so we can
+		// safely set this value to 'test' to avoid running storage
+		// migrations, and other silly things like that
+		StorageBackend:       "test",
+		StorageLocalBasePath: "",
+
+		StatusesMaxChars:           5000,
+		StatusesPollMaxOptions:     6,
+		StatusesPollOptionMaxChars: 50,
+		StatusesMediaMaxFiles:      6,
+
+		LetsEncryptEnabled:      false,
+		LetsEncryptPort:         0,
+		LetsEncryptCertDir:      "",
+		LetsEncryptEmailAddress: "",
+
+		OIDCEnabled:          false,
+		OIDCIdpName:          "",
+		OIDCSkipVerification: false,
+		OIDCIssuer:           "",
+		OIDCClientID:         "",
+		OIDCClientSecret:     "",
+		OIDCScopes:           []string{oidc.ScopeOpenID, "profile", "email", "groups"},
+		OIDCLinkExisting:     false,
+		OIDCAdminGroups:      []string{"adminRole"},
+		OIDCAllowedGroups:    []string{"allowedRole"},
+
+		SMTPHost:               "",
+		SMTPPort:               0,
+		SMTPUsername:           "",
+		SMTPPassword:           "",
+		SMTPFrom:               "GoToSocial",
+		SMTPDiscloseRecipients: false,
+
+		TracingEnabled:           false,
+		TracingEndpoint:          "localhost:4317",
+		TracingTransport:         "grpc",
+		TracingInsecureTransport: true,
+
+		MetricsEnabled:     false,
+		MetricsAuthEnabled: false,
+
+		SyslogEnabled:  false,
+		SyslogProtocol: "udp",
+		SyslogAddress:  "localhost:514",
+
+		AdvancedCookiesSamesite:      "lax",
+		AdvancedRateLimitRequests:    0, // disabled
+		AdvancedThrottlingMultiplier: 0, // disabled
+		AdvancedSenderMultiplier:     0, // 1 sender only, regardless of CPU
+
+		SoftwareVersion: "0.0.0-testrig",
+
+		// simply use cache defaults.
+		Cache: config.Defaults.Cache,
+	}
+}
+
+func envInt(key string, _default int) int {
+	return env(key, _default, func(value string) int {
+		i, _ := strconv.Atoi(value)
+		return i
 	})
 }
 
-var testDefaults = config.Configuration{
+func envStr(key string, _default string) string {
-	LogLevel:           cmp.Or(os.Getenv("GTS_LOG_LEVEL"), "error"),
+	return env(key, _default, func(value string) string {
-	LogTimestampFormat: "02/01/2006 15:04:05.000",
+		return value
-	LogDbQueries:       true,
+	})
-	ApplicationName:    "gotosocial",
+}
-	LandingPageUser:    "",
+
-	ConfigPath:         "",
+func env[T any](key string, _default T, parse func(string) T) T {
-	Host:               "localhost:8080",
+	value, ok := os.LookupEnv(key)
-	AccountDomain:      "localhost:8080",
+	if ok {
-	Protocol:           "http",
+		return parse(value)
-	BindAddress:        "127.0.0.1",
+	}
-	Port:               8080,
+	return _default
-	TrustedProxies:     []string{"127.0.0.1/32", "::1"},
-
-	DbType:                   "sqlite",
-	DbAddress:                ":memory:",
-	DbPort:                   5432,
-	DbUser:                   "postgres",
-	DbPassword:               "postgres",
-	DbDatabase:               "postgres",
-	DbTLSMode:                "disable",
-	DbTLSCACert:              "",
-	DbMaxOpenConnsMultiplier: 8,
-	DbSqliteJournalMode:      "WAL",
-	DbSqliteSynchronous:      "NORMAL",
-	DbSqliteCacheSize:        8 * bytesize.MiB,
-	DbSqliteBusyTimeout:      time.Minute * 5,
-
-	WebTemplateBaseDir: "./web/template/",
-	WebAssetBaseDir:    "./web/assets/",
-
-	InstanceFederationMode:         config.InstanceFederationModeDefault,
-	InstanceFederationSpamFilter:   true,
-	InstanceExposePeers:            true,
-	InstanceExposeSuspended:        true,
-	InstanceExposeSuspendedWeb:     true,
-	InstanceDeliverToSharedInboxes: true,
-	InstanceLanguages: language.Languages{
-		{
-			TagStr: "nl",
-		},
-		{
-			TagStr: "en-gb",
-		},
-	},
-
-	AccountsRegistrationOpen: true,
-	AccountsReasonRequired:   true,
-	AccountsAllowCustomCSS:   true,
-	AccountsCustomCSSLength:  10000,
-
-	MediaImageMaxSize:        10485760, // 10MiB
-	MediaVideoMaxSize:        41943040, // 40MiB
-	MediaDescriptionMinChars: 0,
-	MediaDescriptionMaxChars: 500,
-	MediaRemoteCacheDays:     7,
-	MediaEmojiLocalMaxSize:   51200,          // 50KiB
-	MediaEmojiRemoteMaxSize:  102400,         // 100KiB
-	MediaCleanupFrom:         "00:00",        // midnight.
-	MediaCleanupEvery:        24 * time.Hour, // 1/day.
-
-	// the testrig only uses in-memory storage, so we can
-	// safely set this value to 'test' to avoid running storage
-	// migrations, and other silly things like that
-	StorageBackend:       "test",
-	StorageLocalBasePath: "",
-
-	StatusesMaxChars:           5000,
-	StatusesPollMaxOptions:     6,
-	StatusesPollOptionMaxChars: 50,
-	StatusesMediaMaxFiles:      6,
-
-	LetsEncryptEnabled:      false,
-	LetsEncryptPort:         0,
-	LetsEncryptCertDir:      "",
-	LetsEncryptEmailAddress: "",
-
-	OIDCEnabled:          false,
-	OIDCIdpName:          "",
-	OIDCSkipVerification: false,
-	OIDCIssuer:           "",
-	OIDCClientID:         "",
-	OIDCClientSecret:     "",
-	OIDCScopes:           []string{oidc.ScopeOpenID, "profile", "email", "groups"},
-	OIDCLinkExisting:     false,
-	OIDCAdminGroups:      []string{"adminRole"},
-	OIDCAllowedGroups:    []string{"allowedRole"},
-
-	SMTPHost:               "",
-	SMTPPort:               0,
-	SMTPUsername:           "",
-	SMTPPassword:           "",
-	SMTPFrom:               "GoToSocial",
-	SMTPDiscloseRecipients: false,
-
-	TracingEnabled:           false,
-	TracingEndpoint:          "localhost:4317",
-	TracingTransport:         "grpc",
-	TracingInsecureTransport: true,
-
-	MetricsEnabled:     false,
-	MetricsAuthEnabled: false,
-
-	SyslogEnabled:  false,
-	SyslogProtocol: "udp",
-	SyslogAddress:  "localhost:514",
-
-	AdvancedCookiesSamesite:      "lax",
-	AdvancedRateLimitRequests:    0, // disabled
-	AdvancedThrottlingMultiplier: 0, // disabled
-	AdvancedSenderMultiplier:     0, // 1 sender only, regardless of CPU
-	AdvancedHeaderFilterMode:     config.RequestHeaderFilterModeBlock,
-
-	SoftwareVersion: "0.0.0-testrig",
-
-	// simply use cache defaults.
-	Cache: config.Defaults.Cache,
 }

testrig/db.go

@@ -19,10 +19,7 @@
 
 import (
 	"context"
-	"os"
-	"strconv"
 
-	"github.com/superseriousbusiness/gotosocial/internal/config"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/db/bundb"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
@@ -84,22 +81,6 @@
 // If the environment variable GTS_DB_PORT is set, it will take that
 // value as the port instead.
 func NewTestDB(state *state.State) db.DB {
-	if alternateAddress := os.Getenv("GTS_DB_ADDRESS"); alternateAddress != "" {
-		config.SetDbAddress(alternateAddress)
-	}
-
-	if alternateDBType := os.Getenv("GTS_DB_TYPE"); alternateDBType != "" {
-		config.SetDbType(alternateDBType)
-	}
-
-	if alternateDBPort := os.Getenv("GTS_DB_PORT"); alternateDBPort != "" {
-		port, err := strconv.ParseUint(alternateDBPort, 10, 16)
-		if err != nil {
-			panic(err)
-		}
-		config.SetDbPort(int(port))
-	}
-
 	state.Caches.Init()
 
 	testDB, err := bundb.NewBunDBService(context.Background(), state)
@@ -374,9 +355,10 @@ func StandardDBTeardown(db db.DB) {
 	if db == nil {
 		return
 	}
+	defer db.Close()
 	for _, m := range testModels {
 		if err := db.DropTable(ctx, m); err != nil {
-			log.Panic(nil, err)
+			log.Error(ctx, err)
 		}
 	}
 }

vendor/github.com/ncruces/go-sqlite3/.gitignore

@@ -0,0 +1,16 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+tools

vendor/github.com/ncruces/go-sqlite3/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Nuno Cruces
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/ncruces/go-sqlite3/README.md

@@ -0,0 +1,113 @@
+# Go bindings to SQLite using Wazero
+
+[![Go Reference](https://pkg.go.dev/badge/image)](https://pkg.go.dev/github.com/ncruces/go-sqlite3)
+[![Go Report](https://goreportcard.com/badge/github.com/ncruces/go-sqlite3)](https://goreportcard.com/report/github.com/ncruces/go-sqlite3)
+[![Go Coverage](https://github.com/ncruces/go-sqlite3/wiki/coverage.svg)](https://github.com/ncruces/go-sqlite3/wiki/Test-coverage-report)
+
+Go module `github.com/ncruces/go-sqlite3` is a `cgo`-free [SQLite](https://sqlite.org/) wrapper.\
+It provides a [`database/sql`](https://pkg.go.dev/database/sql) compatible driver,
+as well as direct access to most of the [C SQLite API](https://sqlite.org/cintro.html).
+
+It wraps a [Wasm](https://webassembly.org/) [build](embed/) of SQLite,
+and uses [wazero](https://wazero.io/) as the runtime.\
+Go, wazero and [`x/sys`](https://pkg.go.dev/golang.org/x/sys) are the _only_ runtime dependencies [^1].
+
+### Packages
+
+- [`github.com/ncruces/go-sqlite3`](https://pkg.go.dev/github.com/ncruces/go-sqlite3)
+  wraps the [C SQLite API](https://sqlite.org/cintro.html)
+  ([example usage](https://pkg.go.dev/github.com/ncruces/go-sqlite3#example-package)).
+- [`github.com/ncruces/go-sqlite3/driver`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/driver)
+  provides a [`database/sql`](https://pkg.go.dev/database/sql) driver
+  ([example usage](https://pkg.go.dev/github.com/ncruces/go-sqlite3/driver#example-package)).
+- [`github.com/ncruces/go-sqlite3/embed`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/embed)
+  embeds a build of SQLite into your application.
+- [`github.com/ncruces/go-sqlite3/vfs`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs)
+  wraps the [C SQLite VFS API](https://sqlite.org/vfs.html) and provides a pure Go implementation.
+- [`github.com/ncruces/go-sqlite3/gormlite`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/gormlite)
+  provides a [GORM](https://gorm.io) driver.
+
+### Extensions
+
+- [`github.com/ncruces/go-sqlite3/ext/array`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/array)
+  provides the [`array`](https://sqlite.org/carray.html) table-valued function.
+- [`github.com/ncruces/go-sqlite3/ext/blobio`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/blobio)
+  simplifies [incremental BLOB I/O](https://sqlite.org/c3ref/blob_open.html).
+- [`github.com/ncruces/go-sqlite3/ext/csv`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/csv)
+  reads [comma-separated values](https://sqlite.org/csv.html).
+- [`github.com/ncruces/go-sqlite3/ext/fileio`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/fileio)
+  reads, writes and lists files.
+- [`github.com/ncruces/go-sqlite3/ext/hash`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/hash)
+  provides cryptographic hash functions.
+- [`github.com/ncruces/go-sqlite3/ext/lines`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/lines)
+  reads data [line-by-line](https://github.com/asg017/sqlite-lines).
+- [`github.com/ncruces/go-sqlite3/ext/pivot`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/pivot)
+  creates [pivot tables](https://github.com/jakethaw/pivot_vtab).
+- [`github.com/ncruces/go-sqlite3/ext/statement`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/statement)
+  creates [parameterized views](https://github.com/0x09/sqlite-statement-vtab).
+- [`github.com/ncruces/go-sqlite3/ext/stats`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/stats)
+  provides [statistics](https://www.oreilly.com/library/view/sql-in-a/9780596155322/ch04s02.html) functions.
+- [`github.com/ncruces/go-sqlite3/ext/unicode`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/unicode)
+  provides [Unicode aware](https://sqlite.org/src/dir/ext/icu) functions.
+- [`github.com/ncruces/go-sqlite3/ext/zorder`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/ext/zorder)
+  maps multidimensional data to one dimension.
+- [`github.com/ncruces/go-sqlite3/vfs/memdb`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs/memdb)
+  implements an in-memory VFS.
+- [`github.com/ncruces/go-sqlite3/vfs/readervfs`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs/readervfs)
+  implements a VFS for immutable databases.
+- [`github.com/ncruces/go-sqlite3/vfs/adiantum`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs/adiantum)
+  wraps a VFS to offer encryption at rest.
+
+### Advanced features
+
+- [incremental BLOB I/O](https://sqlite.org/c3ref/blob_open.html)
+- [nested transactions](https://sqlite.org/lang_savepoint.html)
+- [custom functions](https://sqlite.org/c3ref/create_function.html)
+- [virtual tables](https://sqlite.org/vtab.html)
+- [custom VFSes](https://sqlite.org/vfs.html)
+- [online backup](https://sqlite.org/backup.html)
+- [JSON support](https://sqlite.org/json1.html)
+- [math functions](https://sqlite.org/lang_mathfunc.html)
+- [full-text search](https://sqlite.org/fts5.html)
+- [geospatial search](https://sqlite.org/geopoly.html)
+- [encryption at rest](vfs/adiantum/README.md)
+- [and more…](embed/README.md)
+
+### Caveats
+
+This module replaces the SQLite [OS Interface](https://sqlite.org/vfs.html)
+(aka VFS) with a [pure Go](vfs/) implementation,
+which has advantages and disadvantages.
+
+Read more about the Go VFS design [here](vfs/README.md).
+
+### Testing
+
+This project aims for [high test coverage](https://github.com/ncruces/go-sqlite3/wiki/Test-coverage-report).
+It also benefits greatly from [SQLite's](https://sqlite.org/testing.html) and
+[wazero's](https://tetrate.io/blog/introducing-wazero-from-tetrate/#:~:text=Rock%2Dsolid%20test%20approach) thorough testing.
+
+Every commit is [tested](.github/workflows/test.yml) on
+Linux (amd64/arm64/386/riscv64/s390x), macOS (amd64/arm64),
+Windows (amd64), FreeBSD (amd64), illumos (amd64), and Solaris (amd64).
+
+The Go VFS is tested by running SQLite's
+[mptest](https://github.com/sqlite/sqlite/blob/master/mptest/mptest.c).
+
+### Performance
+
+Perfomance of the [`database/sql`](https://pkg.go.dev/database/sql) driver is
+[competitive](https://github.com/cvilsmeier/go-sqlite-bench) with alternatives.
+
+The Wasm and VFS layers are also tested by running SQLite's
+[speedtest1](https://github.com/sqlite/sqlite/blob/master/test/speedtest1.c).
+
+### Alternatives
+
+- [`modernc.org/sqlite`](https://pkg.go.dev/modernc.org/sqlite)
+- [`crawshaw.io/sqlite`](https://pkg.go.dev/crawshaw.io/sqlite)
+- [`github.com/mattn/go-sqlite3`](https://pkg.go.dev/github.com/mattn/go-sqlite3)
+- [`github.com/zombiezen/go-sqlite`](https://pkg.go.dev/github.com/zombiezen/go-sqlite)
+
+[^1]: anything else you find in `go.mod` is either a test dependency,
+      or needed by one of the extensions.

vendor/github.com/ncruces/go-sqlite3/backup.go

@@ -0,0 +1,134 @@
+package sqlite3
+
+// Backup is an handle to an ongoing online backup operation.
+//
+// https://sqlite.org/c3ref/backup.html
+type Backup struct {
+	c      *Conn
+	handle uint32
+	otherc uint32
+}
+
+// Backup backs up srcDB on the src connection to the "main" database in dstURI.
+//
+// Backup opens the SQLite database file dstURI,
+// and blocks until the entire backup is complete.
+// Use [Conn.BackupInit] for incremental backup.
+//
+// https://sqlite.org/backup.html
+func (src *Conn) Backup(srcDB, dstURI string) error {
+	b, err := src.BackupInit(srcDB, dstURI)
+	if err != nil {
+		return err
+	}
+	defer b.Close()
+	_, err = b.Step(-1)
+	return err
+}
+
+// Restore restores dstDB on the dst connection from the "main" database in srcURI.
+//
+// Restore opens the SQLite database file srcURI,
+// and blocks until the entire restore is complete.
+//
+// https://sqlite.org/backup.html
+func (dst *Conn) Restore(dstDB, srcURI string) error {
+	src, err := dst.openDB(srcURI, OPEN_READONLY|OPEN_URI)
+	if err != nil {
+		return err
+	}
+	b, err := dst.backupInit(dst.handle, dstDB, src, "main")
+	if err != nil {
+		return err
+	}
+	defer b.Close()
+	_, err = b.Step(-1)
+	return err
+}
+
+// BackupInit initializes a backup operation to copy the content of one database into another.
+//
+// BackupInit opens the SQLite database file dstURI,
+// then initializes a backup that copies the contents of srcDB on the src connection
+// to the "main" database in dstURI.
+//
+// https://sqlite.org/c3ref/backup_finish.html#sqlite3backupinit
+func (src *Conn) BackupInit(srcDB, dstURI string) (*Backup, error) {
+	dst, err := src.openDB(dstURI, OPEN_READWRITE|OPEN_CREATE|OPEN_URI)
+	if err != nil {
+		return nil, err
+	}
+	return src.backupInit(dst, "main", src.handle, srcDB)
+}
+
+func (c *Conn) backupInit(dst uint32, dstName string, src uint32, srcName string) (*Backup, error) {
+	defer c.arena.mark()()
+	dstPtr := c.arena.string(dstName)
+	srcPtr := c.arena.string(srcName)
+
+	other := dst
+	if c.handle == dst {
+		other = src
+	}
+
+	r := c.call("sqlite3_backup_init",
+		uint64(dst), uint64(dstPtr),
+		uint64(src), uint64(srcPtr))
+	if r == 0 {
+		defer c.closeDB(other)
+		r = c.call("sqlite3_errcode", uint64(dst))
+		return nil, c.sqlite.error(r, dst)
+	}
+
+	return &Backup{
+		c:      c,
+		otherc: other,
+		handle: uint32(r),
+	}, nil
+}
+
+// Close finishes a backup operation.
+//
+// It is safe to close a nil, zero or closed Backup.
+//
+// https://sqlite.org/c3ref/backup_finish.html#sqlite3backupfinish
+func (b *Backup) Close() error {
+	if b == nil || b.handle == 0 {
+		return nil
+	}
+
+	r := b.c.call("sqlite3_backup_finish", uint64(b.handle))
+	b.c.closeDB(b.otherc)
+	b.handle = 0
+	return b.c.error(r)
+}
+
+// Step copies up to nPage pages between the source and destination databases.
+// If nPage is negative, all remaining source pages are copied.
+//
+// https://sqlite.org/c3ref/backup_finish.html#sqlite3backupstep
+func (b *Backup) Step(nPage int) (done bool, err error) {
+	r := b.c.call("sqlite3_backup_step", uint64(b.handle), uint64(nPage))
+	if r == _DONE {
+		return true, nil
+	}
+	return false, b.c.error(r)
+}
+
+// Remaining returns the number of pages still to be backed up
+// at the conclusion of the most recent [Backup.Step].
+//
+// https://sqlite.org/c3ref/backup_finish.html#sqlite3backupremaining
+func (b *Backup) Remaining() int {
+	r := b.c.call("sqlite3_backup_remaining", uint64(b.handle))
+	return int(int32(r))
+}
+
+// PageCount returns the total number of pages in the source database
+// at the conclusion of the most recent [Backup.Step].
+//
+// https://sqlite.org/c3ref/backup_finish.html#sqlite3backuppagecount
+func (b *Backup) PageCount() int {
+	r := b.c.call("sqlite3_backup_pagecount", uint64(b.handle))
+	return int(int32(r))
+}

vendor/github.com/ncruces/go-sqlite3/blob.go

@@ -0,0 +1,250 @@
+package sqlite3
+
+import (
+	"io"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
+
+// ZeroBlob represents a zero-filled, length n BLOB
+// that can be used as an argument to
+// [database/sql.DB.Exec] and similar methods.
+type ZeroBlob int64
+
+// Blob is an handle to an open BLOB.
+//
+// It implements [io.ReadWriteSeeker] for incremental BLOB I/O.
+//
+// https://sqlite.org/c3ref/blob.html
+type Blob struct {
+	c      *Conn
+	bytes  int64
+	offset int64
+	handle uint32
+}
+
+var _ io.ReadWriteSeeker = &Blob{}
+
+// OpenBlob opens a BLOB for incremental I/O.
+//
+// https://sqlite.org/c3ref/blob_open.html
+func (c *Conn) OpenBlob(db, table, column string, row int64, write bool) (*Blob, error) {
+	c.checkInterrupt()
+	defer c.arena.mark()()
+	blobPtr := c.arena.new(ptrlen)
+	dbPtr := c.arena.string(db)
+	tablePtr := c.arena.string(table)
+	columnPtr := c.arena.string(column)
+
+	var flags uint64
+	if write {
+		flags = 1
+	}
+
+	r := c.call("sqlite3_blob_open", uint64(c.handle),
+		uint64(dbPtr), uint64(tablePtr), uint64(columnPtr),
+		uint64(row), flags, uint64(blobPtr))
+
+	if err := c.error(r); err != nil {
+		return nil, err
+	}
+
+	blob := Blob{c: c}
+	blob.handle = util.ReadUint32(c.mod, blobPtr)
+	blob.bytes = int64(c.call("sqlite3_blob_bytes", uint64(blob.handle)))
+	return &blob, nil
+}
+
+// Close closes a BLOB handle.
+//
+// It is safe to close a nil, zero or closed Blob.
+//
+// https://sqlite.org/c3ref/blob_close.html
+func (b *Blob) Close() error {
+	if b == nil || b.handle == 0 {
+		return nil
+	}
+
+	r := b.c.call("sqlite3_blob_close", uint64(b.handle))
+
+	b.handle = 0
+	return b.c.error(r)
+}
+
+// Size returns the size of the BLOB in bytes.
+//
+// https://sqlite.org/c3ref/blob_bytes.html
+func (b *Blob) Size() int64 {
+	return b.bytes
+}
+
+// Read implements the [io.Reader] interface.
+//
+// https://sqlite.org/c3ref/blob_read.html
+func (b *Blob) Read(p []byte) (n int, err error) {
+	if b.offset >= b.bytes {
+		return 0, io.EOF
+	}
+
+	avail := b.bytes - b.offset
+	want := int64(len(p))
+	if want > avail {
+		want = avail
+	}
+
+	defer b.c.arena.mark()()
+	ptr := b.c.arena.new(uint64(want))
+
+	r := b.c.call("sqlite3_blob_read", uint64(b.handle),
+		uint64(ptr), uint64(want), uint64(b.offset))
+	err = b.c.error(r)
+	if err != nil {
+		return 0, err
+	}
+	b.offset += want
+	if b.offset >= b.bytes {
+		err = io.EOF
+	}
+
+	copy(p, util.View(b.c.mod, ptr, uint64(want)))
+	return int(want), err
+}
+
+// WriteTo implements the [io.WriterTo] interface.
+//
+// https://sqlite.org/c3ref/blob_read.html
+func (b *Blob) WriteTo(w io.Writer) (n int64, err error) {
+	if b.offset >= b.bytes {
+		return 0, nil
+	}
+
+	want := int64(1024 * 1024)
+	avail := b.bytes - b.offset
+	if want > avail {
+		want = avail
+	}
+
+	defer b.c.arena.mark()()
+	ptr := b.c.arena.new(uint64(want))
+
+	for want > 0 {
+		r := b.c.call("sqlite3_blob_read", uint64(b.handle),
+			uint64(ptr), uint64(want), uint64(b.offset))
+		err = b.c.error(r)
+		if err != nil {
+			return n, err
+		}
+
+		mem := util.View(b.c.mod, ptr, uint64(want))
+		m, err := w.Write(mem[:want])
+		b.offset += int64(m)
+		n += int64(m)
+		if err != nil {
+			return n, err
+		}
+		if int64(m) != want {
+			return n, io.ErrShortWrite
+		}
+
+		avail = b.bytes - b.offset
+		if want > avail {
+			want = avail
+		}
+	}
+	return n, nil
+}
+
+// Write implements the [io.Writer] interface.
+//
+// https://sqlite.org/c3ref/blob_write.html
+func (b *Blob) Write(p []byte) (n int, err error) {
+	defer b.c.arena.mark()()
+	ptr := b.c.arena.bytes(p)
+
+	r := b.c.call("sqlite3_blob_write", uint64(b.handle),
+		uint64(ptr), uint64(len(p)), uint64(b.offset))
+	err = b.c.error(r)
+	if err != nil {
+		return 0, err
+	}
+	b.offset += int64(len(p))
+	return len(p), nil
+}
+
+// ReadFrom implements the [io.ReaderFrom] interface.
+//
+// https://sqlite.org/c3ref/blob_write.html
+func (b *Blob) ReadFrom(r io.Reader) (n int64, err error) {
+	want := int64(1024 * 1024)
+	avail := b.bytes - b.offset
+	if l, ok := r.(*io.LimitedReader); ok && want > l.N {
+		want = l.N
+	}
+	if want > avail {
+		want = avail
+	}
+	if want < 1 {
+		want = 1
+	}
+
+	defer b.c.arena.mark()()
+	ptr := b.c.arena.new(uint64(want))
+
+	for {
+		mem := util.View(b.c.mod, ptr, uint64(want))
+		m, err := r.Read(mem[:want])
+		if m > 0 {
+			r := b.c.call("sqlite3_blob_write", uint64(b.handle),
+				uint64(ptr), uint64(m), uint64(b.offset))
+			err := b.c.error(r)
+			if err != nil {
+				return n, err
+			}
+			b.offset += int64(m)
+			n += int64(m)
+		}
+		if err == io.EOF {
+			return n, nil
+		}
+		if err != nil {
+			return n, err
+		}
+
+		avail = b.bytes - b.offset
+		if want > avail {
+			want = avail
+		}
+		if want < 1 {
+			want = 1
+		}
+	}
+}
+
+// Seek implements the [io.Seeker] interface.
+func (b *Blob) Seek(offset int64, whence int) (int64, error) {
+	switch whence {
+	default:
+		return 0, util.WhenceErr
+	case io.SeekStart:
+		break
+	case io.SeekCurrent:
+		offset += b.offset
+	case io.SeekEnd:
+		offset += b.bytes
+	}
+	if offset < 0 {
+		return 0, util.OffsetErr
+	}
+	b.offset = offset
+	return offset, nil
+}
+
+// Reopen moves a BLOB handle to a new row of the same database table.
+//
+// https://sqlite.org/c3ref/blob_reopen.html
+func (b *Blob) Reopen(row int64) error {
+	err := b.c.error(b.c.call("sqlite3_blob_reopen", uint64(b.handle), uint64(row)))
+	b.bytes = int64(b.c.call("sqlite3_blob_bytes", uint64(b.handle)))
+	b.offset = 0
+	return err
+}

vendor/github.com/ncruces/go-sqlite3/config.go

@@ -0,0 +1,164 @@
+package sqlite3
+
+import (
+	"context"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+	"github.com/tetratelabs/wazero/api"
+)
+
+// Config makes configuration changes to a database connection.
+// Only boolean configuration options are supported.
+// Called with no arg reads the current configuration value,
+// called with one arg sets and returns the new value.
+//
+// https://sqlite.org/c3ref/db_config.html
+func (c *Conn) Config(op DBConfig, arg ...bool) (bool, error) {
+	defer c.arena.mark()()
+	argsPtr := c.arena.new(2 * ptrlen)
+
+	var flag int
+	switch {
+	case len(arg) == 0:
+		flag = -1
+	case arg[0]:
+		flag = 1
+	}
+
+	util.WriteUint32(c.mod, argsPtr+0*ptrlen, uint32(flag))
+	util.WriteUint32(c.mod, argsPtr+1*ptrlen, argsPtr)
+
+	r := c.call("sqlite3_db_config", uint64(c.handle),
+		uint64(op), uint64(argsPtr))
+	return util.ReadUint32(c.mod, argsPtr) != 0, c.error(r)
+}
+
+// ConfigLog sets up the error logging callback for the connection.
+//
+// https://sqlite.org/errlog.html
+func (c *Conn) ConfigLog(cb func(code ExtendedErrorCode, msg string)) error {
+	var enable uint64
+	if cb != nil {
+		enable = 1
+	}
+	r := c.call("sqlite3_config_log_go", enable)
+	if err := c.error(r); err != nil {
+		return err
+	}
+	c.log = cb
+	return nil
+}
+
+func logCallback(ctx context.Context, mod api.Module, _, iCode, zMsg uint32) {
+	if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.log != nil {
+		msg := util.ReadString(mod, zMsg, _MAX_LENGTH)
+		c.log(xErrorCode(iCode), msg)
+	}
+}
+
+// Limit allows the size of various constructs to be
+// limited on a connection by connection basis.
+//
+// https://sqlite.org/c3ref/limit.html
+func (c *Conn) Limit(id LimitCategory, value int) int {
+	r := c.call("sqlite3_limit", uint64(c.handle), uint64(id), uint64(value))
+	return int(int32(r))
+}
+
+// SetAuthorizer registers an authorizer callback with the database connection.
+//
+// https://sqlite.org/c3ref/set_authorizer.html
+func (c *Conn) SetAuthorizer(cb func(action AuthorizerActionCode, name3rd, name4th, schema, nameInner string) AuthorizerReturnCode) error {
+	var enable uint64
+	if cb != nil {
+		enable = 1
+	}
+	r := c.call("sqlite3_set_authorizer_go", uint64(c.handle), enable)
+	if err := c.error(r); err != nil {
+		return err
+	}
+	c.authorizer = cb
+	return nil
+
+}
+
+func authorizerCallback(ctx context.Context, mod api.Module, pDB uint32, action AuthorizerActionCode, zName3rd, zName4th, zSchema, zNameInner uint32) (rc AuthorizerReturnCode) {
+	if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.authorizer != nil {
+		var name3rd, name4th, schema, nameInner string
+		if zName3rd != 0 {
+			name3rd = util.ReadString(mod, zName3rd, _MAX_NAME)
+		}
+		if zName4th != 0 {
+			name4th = util.ReadString(mod, zName4th, _MAX_NAME)
+		}
+		if zSchema != 0 {
+			schema = util.ReadString(mod, zSchema, _MAX_NAME)
+		}
+		if zNameInner != 0 {
+			nameInner = util.ReadString(mod, zNameInner, _MAX_NAME)
+		}
+		rc = c.authorizer(action, name3rd, name4th, schema, nameInner)
+	}
+	return rc
+}
+
+// WalCheckpoint checkpoints a WAL database.
+//
+// https://sqlite.org/c3ref/wal_checkpoint_v2.html
+func (c *Conn) WalCheckpoint(schema string, mode CheckpointMode) (nLog, nCkpt int, err error) {
+	defer c.arena.mark()()
+	nLogPtr := c.arena.new(ptrlen)
+	nCkptPtr := c.arena.new(ptrlen)
+	schemaPtr := c.arena.string(schema)
+	r := c.call("sqlite3_wal_checkpoint_v2",
+		uint64(c.handle), uint64(schemaPtr), uint64(mode),
+		uint64(nLogPtr), uint64(nCkptPtr))
+	nLog = int(int32(util.ReadUint32(c.mod, nLogPtr)))
+	nCkpt = int(int32(util.ReadUint32(c.mod, nCkptPtr)))
+	return nLog, nCkpt, c.error(r)
+}
+
+// WalAutoCheckpoint configures WAL auto-checkpoints.
+//
+// https://sqlite.org/c3ref/wal_autocheckpoint.html
+func (c *Conn) WalAutoCheckpoint(pages int) error {
+	r := c.call("sqlite3_wal_autocheckpoint", uint64(c.handle), uint64(pages))
+	return c.error(r)
+}
+
+// WalHook registers a callback function to be invoked
+// each time data is committed to a database in WAL mode.
+//
+// https://sqlite.org/c3ref/wal_hook.html
+func (c *Conn) WalHook(cb func(db *Conn, schema string, pages int) error) {
+	var enable uint64
+	if cb != nil {
+		enable = 1
+	}
+	c.call("sqlite3_wal_hook_go", uint64(c.handle), enable)
+	c.wal = cb
+}
+
+func walCallback(ctx context.Context, mod api.Module, _, pDB, zSchema uint32, pages int32) (rc uint32) {
+	if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.wal != nil {
+		schema := util.ReadString(mod, zSchema, _MAX_NAME)
+		err := c.wal(c, schema, int(pages))
+		_, rc = errorCode(err, ERROR)
+	}
+	return rc
+}
+
+// AutoVacuumPages registers a autovacuum compaction amount callback.
+//
+// https://sqlite.org/c3ref/autovacuum_pages.html
+func (c *Conn) AutoVacuumPages(cb func(schema string, dbPages, freePages, bytesPerPage uint) uint) error {
+	funcPtr := util.AddHandle(c.ctx, cb)
+	r := c.call("sqlite3_autovacuum_pages_go", uint64(c.handle), uint64(funcPtr))
+	return c.error(r)
+}
+
+func autoVacuumCallback(ctx context.Context, mod api.Module, pApp, zSchema, nDbPage, nFreePage, nBytePerPage uint32) uint32 {
+	fn := util.GetHandle(ctx, pApp).(func(schema string, dbPages, freePages, bytesPerPage uint) uint)
+	schema := util.ReadString(mod, zSchema, _MAX_NAME)
+	return uint32(fn(schema, uint(nDbPage), uint(nFreePage), uint(nBytePerPage)))
+}

vendor/github.com/ncruces/go-sqlite3/conn.go

@@ -0,0 +1,426 @@
+package sqlite3
+
+import (
+	"context"
+	"fmt"
+	"math"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+	"github.com/ncruces/go-sqlite3/vfs"
+	"github.com/tetratelabs/wazero/api"
+)
+
+// Conn is a database connection handle.
+// A Conn is not safe for concurrent use by multiple goroutines.
+//
+// https://sqlite.org/c3ref/sqlite3.html
+type Conn struct {
+	*sqlite
+
+	interrupt  context.Context
+	pending    *Stmt
+	busy       func(int) bool
+	log        func(xErrorCode, string)
+	collation  func(*Conn, string)
+	authorizer func(AuthorizerActionCode, string, string, string, string) AuthorizerReturnCode
+	update     func(AuthorizerActionCode, string, string, int64)
+	commit     func() bool
+	rollback   func()
+	wal        func(*Conn, string, int) error
+	arena      arena
+
+	handle uint32
+}
+
+// Open calls [OpenFlags] with [OPEN_READWRITE], [OPEN_CREATE], [OPEN_URI] and [OPEN_NOFOLLOW].
+func Open(filename string) (*Conn, error) {
+	return newConn(filename, OPEN_READWRITE|OPEN_CREATE|OPEN_URI|OPEN_NOFOLLOW)
+}
+
+// OpenFlags opens an SQLite database file as specified by the filename argument.
+//
+// If none of the required flags is used, a combination of [OPEN_READWRITE] and [OPEN_CREATE] is used.
+// If a URI filename is used, PRAGMA statements to execute can be specified using "_pragma":
+//
+//	sqlite3.Open("file:demo.db?_pragma=busy_timeout(10000)")
+//
+// https://sqlite.org/c3ref/open.html
+func OpenFlags(filename string, flags OpenFlag) (*Conn, error) {
+	if flags&(OPEN_READONLY|OPEN_READWRITE|OPEN_CREATE) == 0 {
+		flags |= OPEN_READWRITE | OPEN_CREATE
+	}
+	return newConn(filename, flags)
+}
+
+type connKey struct{}
+
+func newConn(filename string, flags OpenFlag) (conn *Conn, err error) {
+	sqlite, err := instantiateSQLite()
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if conn == nil {
+			sqlite.close()
+		}
+	}()
+
+	c := &Conn{sqlite: sqlite}
+	c.arena = c.newArena(1024)
+	c.ctx = context.WithValue(c.ctx, connKey{}, c)
+	c.handle, err = c.openDB(filename, flags)
+	if err != nil {
+		return nil, err
+	}
+	return c, nil
+}
+
+func (c *Conn) openDB(filename string, flags OpenFlag) (uint32, error) {
+	defer c.arena.mark()()
+	connPtr := c.arena.new(ptrlen)
+	namePtr := c.arena.string(filename)
+
+	flags |= OPEN_EXRESCODE
+	r := c.call("sqlite3_open_v2", uint64(namePtr), uint64(connPtr), uint64(flags), 0)
+
+	handle := util.ReadUint32(c.mod, connPtr)
+	if err := c.sqlite.error(r, handle); err != nil {
+		c.closeDB(handle)
+		return 0, err
+	}
+
+	if flags|OPEN_URI != 0 && strings.HasPrefix(filename, "file:") {
+		var pragmas strings.Builder
+		if _, after, ok := strings.Cut(filename, "?"); ok {
+			query, _ := url.ParseQuery(after)
+			for _, p := range query["_pragma"] {
+				pragmas.WriteString(`PRAGMA `)
+				pragmas.WriteString(p)
+				pragmas.WriteString(`;`)
+			}
+		}
+		if pragmas.Len() != 0 {
+			pragmaPtr := c.arena.string(pragmas.String())
+			r := c.call("sqlite3_exec", uint64(handle), uint64(pragmaPtr), 0, 0, 0)
+			if err := c.sqlite.error(r, handle, pragmas.String()); err != nil {
+				err = fmt.Errorf("sqlite3: invalid _pragma: %w", err)
+				c.closeDB(handle)
+				return 0, err
+			}
+		}
+	}
+	c.call("sqlite3_progress_handler_go", uint64(handle), 100)
+	return handle, nil
+}
+
+func (c *Conn) closeDB(handle uint32) {
+	r := c.call("sqlite3_close_v2", uint64(handle))
+	if err := c.sqlite.error(r, handle); err != nil {
+		panic(err)
+	}
+}
+
+// Close closes the database connection.
+//
+// If the database connection is associated with unfinalized prepared statements,
+// open blob handles, and/or unfinished backup objects,
+// Close will leave the database connection open and return [BUSY].
+//
+// It is safe to close a nil, zero or closed Conn.
+//
+// https://sqlite.org/c3ref/close.html
+func (c *Conn) Close() error {
+	if c == nil || c.handle == 0 {
+		return nil
+	}
+
+	c.pending.Close()
+	c.pending = nil
+
+	r := c.call("sqlite3_close", uint64(c.handle))
+	if err := c.error(r); err != nil {
+		return err
+	}
+
+	c.handle = 0
+	return c.close()
+}
+
+// Exec is a convenience function that allows an application to run
+// multiple statements of SQL without having to use a lot of code.
+//
+// https://sqlite.org/c3ref/exec.html
+func (c *Conn) Exec(sql string) error {
+	c.checkInterrupt()
+	defer c.arena.mark()()
+	sqlPtr := c.arena.string(sql)
+
+	r := c.call("sqlite3_exec", uint64(c.handle), uint64(sqlPtr), 0, 0, 0)
+	return c.error(r, sql)
+}
+
+// Prepare calls [Conn.PrepareFlags] with no flags.
+func (c *Conn) Prepare(sql string) (stmt *Stmt, tail string, err error) {
+	return c.PrepareFlags(sql, 0)
+}
+
+// PrepareFlags compiles the first SQL statement in sql;
+// tail is left pointing to what remains uncompiled.
+// If the input text contains no SQL (if the input is an empty string or a comment),
+// both stmt and err will be nil.
+//
+// https://sqlite.org/c3ref/prepare.html
+func (c *Conn) PrepareFlags(sql string, flags PrepareFlag) (stmt *Stmt, tail string, err error) {
+	if len(sql) > _MAX_SQL_LENGTH {
+		return nil, "", TOOBIG
+	}
+
+	defer c.arena.mark()()
+	stmtPtr := c.arena.new(ptrlen)
+	tailPtr := c.arena.new(ptrlen)
+	sqlPtr := c.arena.string(sql)
+
+	r := c.call("sqlite3_prepare_v3", uint64(c.handle),
+		uint64(sqlPtr), uint64(len(sql)+1), uint64(flags),
+		uint64(stmtPtr), uint64(tailPtr))
+
+	stmt = &Stmt{c: c}
+	stmt.handle = util.ReadUint32(c.mod, stmtPtr)
+	if sql := sql[util.ReadUint32(c.mod, tailPtr)-sqlPtr:]; sql != "" {
+		tail = sql
+	}
+
+	if err := c.error(r, sql); err != nil {
+		return nil, "", err
+	}
+	if stmt.handle == 0 {
+		return nil, "", nil
+	}
+	return stmt, tail, nil
+}
+
+// DBName returns the schema name for n-th database on the database connection.
+//
+// https://sqlite.org/c3ref/db_name.html
+func (c *Conn) DBName(n int) string {
+	r := c.call("sqlite3_db_name", uint64(c.handle), uint64(n))
+
+	ptr := uint32(r)
+	if ptr == 0 {
+		return ""
+	}
+	return util.ReadString(c.mod, ptr, _MAX_NAME)
+}
+
+// Filename returns the filename for a database.
+//
+// https://sqlite.org/c3ref/db_filename.html
+func (c *Conn) Filename(schema string) *vfs.Filename {
+	var ptr uint32
+	if schema != "" {
+		defer c.arena.mark()()
+		ptr = c.arena.string(schema)
+	}
+
+	r := c.call("sqlite3_db_filename", uint64(c.handle), uint64(ptr))
+	return vfs.OpenFilename(c.ctx, c.mod, uint32(r), vfs.OPEN_MAIN_DB)
+}
+
+// ReadOnly determines if a database is read-only.
+//
+// https://sqlite.org/c3ref/db_readonly.html
+func (c *Conn) ReadOnly(schema string) (ro bool, ok bool) {
+	var ptr uint32
+	if schema != "" {
+		defer c.arena.mark()()
+		ptr = c.arena.string(schema)
+	}
+	r := c.call("sqlite3_db_readonly", uint64(c.handle), uint64(ptr))
+	return int32(r) > 0, int32(r) < 0
+}
+
+// GetAutocommit tests the connection for auto-commit mode.
+//
+// https://sqlite.org/c3ref/get_autocommit.html
+func (c *Conn) GetAutocommit() bool {
+	r := c.call("sqlite3_get_autocommit", uint64(c.handle))
+	return r != 0
+}
+
+// LastInsertRowID returns the rowid of the most recent successful INSERT
+// on the database connection.
+//
+// https://sqlite.org/c3ref/last_insert_rowid.html
+func (c *Conn) LastInsertRowID() int64 {
+	r := c.call("sqlite3_last_insert_rowid", uint64(c.handle))
+	return int64(r)
+}
+
+// SetLastInsertRowID allows the application to set the value returned by
+// [Conn.LastInsertRowID].
+//
+// https://sqlite.org/c3ref/set_last_insert_rowid.html
+func (c *Conn) SetLastInsertRowID(id int64) {
+	c.call("sqlite3_set_last_insert_rowid", uint64(c.handle), uint64(id))
+}
+
+// Changes returns the number of rows modified, inserted or deleted
+// by the most recently completed INSERT, UPDATE or DELETE statement
+// on the database connection.
+//
+// https://sqlite.org/c3ref/changes.html
+func (c *Conn) Changes() int64 {
+	r := c.call("sqlite3_changes64", uint64(c.handle))
+	return int64(r)
+}
+
+// TotalChanges returns the number of rows modified, inserted or deleted
+// by all INSERT, UPDATE or DELETE statements completed
+// since the database connection was opened.
+//
+// https://sqlite.org/c3ref/total_changes.html
+func (c *Conn) TotalChanges() int64 {
+	r := c.call("sqlite3_total_changes64", uint64(c.handle))
+	return int64(r)
+}
+
+// ReleaseMemory frees memory used by a database connection.
+//
+// https://sqlite.org/c3ref/db_release_memory.html
+func (c *Conn) ReleaseMemory() error {
+	r := c.call("sqlite3_db_release_memory", uint64(c.handle))
+	return c.error(r)
+}
+
+// GetInterrupt gets the context set with [Conn.SetInterrupt],
+// or nil if none was set.
+func (c *Conn) GetInterrupt() context.Context {
+	return c.interrupt
+}
+
+// SetInterrupt interrupts a long-running query when a context is done.
+//
+// Subsequent uses of the connection will return [INTERRUPT]
+// until the context is reset by another call to SetInterrupt.
+//
+// To associate a timeout with a connection:
+//
+//	ctx, cancel := context.WithTimeout(context.TODO(), 100*time.Millisecond)
+//	conn.SetInterrupt(ctx)
+//	defer cancel()
+//
+// SetInterrupt returns the old context assigned to the connection.
+//
+// https://sqlite.org/c3ref/interrupt.html
+func (c *Conn) SetInterrupt(ctx context.Context) (old context.Context) {
+	// Is it the same context?
+	if ctx == c.interrupt {
+		return ctx
+	}
+
+	// A busy SQL statement prevents SQLite from ignoring an interrupt
+	// that comes before any other statements are started.
+	if c.pending == nil {
+		c.pending, _, _ = c.Prepare(`WITH RECURSIVE c(x) AS (VALUES(0) UNION ALL SELECT x FROM c) SELECT x FROM c`)
+	}
+
+	old = c.interrupt
+	c.interrupt = ctx
+
+	if old != nil && old.Done() != nil && (ctx == nil || ctx.Err() == nil) {
+		c.pending.Reset()
+	}
+	if ctx != nil && ctx.Done() != nil {
+		c.pending.Step()
+	}
+	return old
+}
+
+func (c *Conn) checkInterrupt() {
+	if c.interrupt != nil && c.interrupt.Err() != nil {
+		c.call("sqlite3_interrupt", uint64(c.handle))
+	}
+}
+
+func progressCallback(ctx context.Context, mod api.Module, pDB uint32) (interrupt uint32) {
+	if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB &&
+		c.interrupt != nil && c.interrupt.Err() != nil {
+		interrupt = 1
+	}
+	return interrupt
+}
+
+// BusyTimeout sets a busy timeout.
+//
+// https://sqlite.org/c3ref/busy_timeout.html
+func (c *Conn) BusyTimeout(timeout time.Duration) error {
+	ms := min((timeout+time.Millisecond-1)/time.Millisecond, math.MaxInt32)
+	r := c.call("sqlite3_busy_timeout", uint64(c.handle), uint64(ms))
+	return c.error(r)
+}
+
+func timeoutCallback(ctx context.Context, mod api.Module, pDB uint32, count, tmout int32) (retry uint32) {
+	if c, ok := ctx.Value(connKey{}).(*Conn); ok &&
+		(c.interrupt == nil || c.interrupt.Err() == nil) {
+		const delays = "\x01\x02\x05\x0a\x0f\x14\x19\x19\x19\x32\x32\x64"
+		const totals = "\x00\x01\x03\x08\x12\x21\x35\x4e\x67\x80\xb2\xe4"
+		const ndelay = int32(len(delays) - 1)
+
+		var delay, prior int32
+		if count <= ndelay {
+			delay = int32(delays[count])
+			prior = int32(totals[count])
+		} else {
+			delay = int32(delays[ndelay])
+			prior = int32(totals[ndelay]) + delay*(count-ndelay)
+		}
+
+		if delay = min(delay, tmout-prior); delay > 0 {
+			time.Sleep(time.Duration(delay) * time.Millisecond)
+			retry = 1
+		}
+	}
+	return retry
+}
+
+// BusyHandler registers a callback to handle [BUSY] errors.
+//
+// https://sqlite.org/c3ref/busy_handler.html
+func (c *Conn) BusyHandler(cb func(count int) (retry bool)) error {
+	var enable uint64
+	if cb != nil {
+		enable = 1
+	}
+	r := c.call("sqlite3_busy_handler_go", uint64(c.handle), enable)
+	if err := c.error(r); err != nil {
+		return err
+	}
+	c.busy = cb
+	return nil
+}
+
+func busyCallback(ctx context.Context, mod api.Module, pDB uint32, count int32) (retry uint32) {
+	if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.busy != nil &&
+		(c.interrupt == nil || c.interrupt.Err() == nil) {
+		if c.busy(int(count)) {
+			retry = 1
+		}
+	}
+	return retry
+}
+
+func (c *Conn) error(rc uint64, sql ...string) error {
+	return c.sqlite.error(rc, c.handle, sql...)
+}
+
+// DriverConn is implemented by the SQLite [database/sql] driver connection.
+//
+// It can be used to access SQLite features like [online backup].
+//
+// [online backup]: https://sqlite.org/backup.html
+type DriverConn interface {
+	Raw() *Conn
+}

vendor/github.com/ncruces/go-sqlite3/const.go

@@ -0,0 +1,360 @@
+package sqlite3
+
+import "strconv"
+
+const (
+	_OK   = 0   /* Successful result */
+	_ROW  = 100 /* sqlite3_step() has another row ready */
+	_DONE = 101 /* sqlite3_step() has finished executing */
+
+	_UTF8 = 1
+
+	_MAX_NAME            = 1e6 // Self-imposed limit for most NUL terminated strings.
+	_MAX_LENGTH          = 1e9
+	_MAX_SQL_LENGTH      = 1e9
+	_MAX_ALLOCATION_SIZE = 0x7ffffeff
+	_MAX_FUNCTION_ARG    = 100
+
+	ptrlen = 4
+)
+
+// ErrorCode is a result code that [Error.Code] might return.
+//
+// https://sqlite.org/rescode.html
+type ErrorCode uint8
+
+const (
+	ERROR      ErrorCode = 1  /* Generic error */
+	INTERNAL   ErrorCode = 2  /* Internal logic error in SQLite */
+	PERM       ErrorCode = 3  /* Access permission denied */
+	ABORT      ErrorCode = 4  /* Callback routine requested an abort */
+	BUSY       ErrorCode = 5  /* The database file is locked */
+	LOCKED     ErrorCode = 6  /* A table in the database is locked */
+	NOMEM      ErrorCode = 7  /* A malloc() failed */
+	READONLY   ErrorCode = 8  /* Attempt to write a readonly database */
+	INTERRUPT  ErrorCode = 9  /* Operation terminated by sqlite3_interrupt() */
+	IOERR      ErrorCode = 10 /* Some kind of disk I/O error occurred */
+	CORRUPT    ErrorCode = 11 /* The database disk image is malformed */
+	NOTFOUND   ErrorCode = 12 /* Unknown opcode in sqlite3_file_control() */
+	FULL       ErrorCode = 13 /* Insertion failed because database is full */
+	CANTOPEN   ErrorCode = 14 /* Unable to open the database file */
+	PROTOCOL   ErrorCode = 15 /* Database lock protocol error */
+	EMPTY      ErrorCode = 16 /* Internal use only */
+	SCHEMA     ErrorCode = 17 /* The database schema changed */
+	TOOBIG     ErrorCode = 18 /* String or BLOB exceeds size limit */
+	CONSTRAINT ErrorCode = 19 /* Abort due to constraint violation */
+	MISMATCH   ErrorCode = 20 /* Data type mismatch */
+	MISUSE     ErrorCode = 21 /* Library used incorrectly */
+	NOLFS      ErrorCode = 22 /* Uses OS features not supported on host */
+	AUTH       ErrorCode = 23 /* Authorization denied */
+	FORMAT     ErrorCode = 24 /* Not used */
+	RANGE      ErrorCode = 25 /* 2nd parameter to sqlite3_bind out of range */
+	NOTADB     ErrorCode = 26 /* File opened that is not a database file */
+	NOTICE     ErrorCode = 27 /* Notifications from sqlite3_log() */
+	WARNING    ErrorCode = 28 /* Warnings from sqlite3_log() */
+)
+
+// ExtendedErrorCode is a result code that [Error.ExtendedCode] might return.
+//
+// https://sqlite.org/rescode.html
+type (
+	ExtendedErrorCode uint16
+	xErrorCode        = ExtendedErrorCode
+)
+
+const (
+	ERROR_MISSING_COLLSEQ   ExtendedErrorCode = xErrorCode(ERROR) | (1 << 8)
+	ERROR_RETRY             ExtendedErrorCode = xErrorCode(ERROR) | (2 << 8)
+	ERROR_SNAPSHOT          ExtendedErrorCode = xErrorCode(ERROR) | (3 << 8)
+	IOERR_READ              ExtendedErrorCode = xErrorCode(IOERR) | (1 << 8)
+	IOERR_SHORT_READ        ExtendedErrorCode = xErrorCode(IOERR) | (2 << 8)
+	IOERR_WRITE             ExtendedErrorCode = xErrorCode(IOERR) | (3 << 8)
+	IOERR_FSYNC             ExtendedErrorCode = xErrorCode(IOERR) | (4 << 8)
+	IOERR_DIR_FSYNC         ExtendedErrorCode = xErrorCode(IOERR) | (5 << 8)
+	IOERR_TRUNCATE          ExtendedErrorCode = xErrorCode(IOERR) | (6 << 8)
+	IOERR_FSTAT             ExtendedErrorCode = xErrorCode(IOERR) | (7 << 8)
+	IOERR_UNLOCK            ExtendedErrorCode = xErrorCode(IOERR) | (8 << 8)
+	IOERR_RDLOCK            ExtendedErrorCode = xErrorCode(IOERR) | (9 << 8)
+	IOERR_DELETE            ExtendedErrorCode = xErrorCode(IOERR) | (10 << 8)
+	IOERR_BLOCKED           ExtendedErrorCode = xErrorCode(IOERR) | (11 << 8)
+	IOERR_NOMEM             ExtendedErrorCode = xErrorCode(IOERR) | (12 << 8)
+	IOERR_ACCESS            ExtendedErrorCode = xErrorCode(IOERR) | (13 << 8)
+	IOERR_CHECKRESERVEDLOCK ExtendedErrorCode = xErrorCode(IOERR) | (14 << 8)
+	IOERR_LOCK              ExtendedErrorCode = xErrorCode(IOERR) | (15 << 8)
+	IOERR_CLOSE             ExtendedErrorCode = xErrorCode(IOERR) | (16 << 8)
+	IOERR_DIR_CLOSE         ExtendedErrorCode = xErrorCode(IOERR) | (17 << 8)
+	IOERR_SHMOPEN           ExtendedErrorCode = xErrorCode(IOERR) | (18 << 8)
+	IOERR_SHMSIZE           ExtendedErrorCode = xErrorCode(IOERR) | (19 << 8)
+	IOERR_SHMLOCK           ExtendedErrorCode = xErrorCode(IOERR) | (20 << 8)
+	IOERR_SHMMAP            ExtendedErrorCode = xErrorCode(IOERR) | (21 << 8)
+	IOERR_SEEK              ExtendedErrorCode = xErrorCode(IOERR) | (22 << 8)
+	IOERR_DELETE_NOENT      ExtendedErrorCode = xErrorCode(IOERR) | (23 << 8)
+	IOERR_MMAP              ExtendedErrorCode = xErrorCode(IOERR) | (24 << 8)
+	IOERR_GETTEMPPATH       ExtendedErrorCode = xErrorCode(IOERR) | (25 << 8)
+	IOERR_CONVPATH          ExtendedErrorCode = xErrorCode(IOERR) | (26 << 8)
+	IOERR_VNODE             ExtendedErrorCode = xErrorCode(IOERR) | (27 << 8)
+	IOERR_AUTH              ExtendedErrorCode = xErrorCode(IOERR) | (28 << 8)
+	IOERR_BEGIN_ATOMIC      ExtendedErrorCode = xErrorCode(IOERR) | (29 << 8)
+	IOERR_COMMIT_ATOMIC     ExtendedErrorCode = xErrorCode(IOERR) | (30 << 8)
+	IOERR_ROLLBACK_ATOMIC   ExtendedErrorCode = xErrorCode(IOERR) | (31 << 8)
+	IOERR_DATA              ExtendedErrorCode = xErrorCode(IOERR) | (32 << 8)
+	IOERR_CORRUPTFS         ExtendedErrorCode = xErrorCode(IOERR) | (33 << 8)
+	IOERR_IN_PAGE           ExtendedErrorCode = xErrorCode(IOERR) | (34 << 8)
+	LOCKED_SHAREDCACHE      ExtendedErrorCode = xErrorCode(LOCKED) | (1 << 8)
+	LOCKED_VTAB             ExtendedErrorCode = xErrorCode(LOCKED) | (2 << 8)
+	BUSY_RECOVERY           ExtendedErrorCode = xErrorCode(BUSY) | (1 << 8)
+	BUSY_SNAPSHOT           ExtendedErrorCode = xErrorCode(BUSY) | (2 << 8)
+	BUSY_TIMEOUT            ExtendedErrorCode = xErrorCode(BUSY) | (3 << 8)
+	CANTOPEN_NOTEMPDIR      ExtendedErrorCode = xErrorCode(CANTOPEN) | (1 << 8)
+	CANTOPEN_ISDIR          ExtendedErrorCode = xErrorCode(CANTOPEN) | (2 << 8)
+	CANTOPEN_FULLPATH       ExtendedErrorCode = xErrorCode(CANTOPEN) | (3 << 8)
+	CANTOPEN_CONVPATH       ExtendedErrorCode = xErrorCode(CANTOPEN) | (4 << 8)
+	CANTOPEN_DIRTYWAL       ExtendedErrorCode = xErrorCode(CANTOPEN) | (5 << 8) /* Not Used */
+	CANTOPEN_SYMLINK        ExtendedErrorCode = xErrorCode(CANTOPEN) | (6 << 8)
+	CORRUPT_VTAB            ExtendedErrorCode = xErrorCode(CORRUPT) | (1 << 8)
+	CORRUPT_SEQUENCE        ExtendedErrorCode = xErrorCode(CORRUPT) | (2 << 8)
+	CORRUPT_INDEX           ExtendedErrorCode = xErrorCode(CORRUPT) | (3 << 8)
+	READONLY_RECOVERY       ExtendedErrorCode = xErrorCode(READONLY) | (1 << 8)
+	READONLY_CANTLOCK       ExtendedErrorCode = xErrorCode(READONLY) | (2 << 8)
+	READONLY_ROLLBACK       ExtendedErrorCode = xErrorCode(READONLY) | (3 << 8)
+	READONLY_DBMOVED        ExtendedErrorCode = xErrorCode(READONLY) | (4 << 8)
+	READONLY_CANTINIT       ExtendedErrorCode = xErrorCode(READONLY) | (5 << 8)
+	READONLY_DIRECTORY      ExtendedErrorCode = xErrorCode(READONLY) | (6 << 8)
+	ABORT_ROLLBACK          ExtendedErrorCode = xErrorCode(ABORT) | (2 << 8)
+	CONSTRAINT_CHECK        ExtendedErrorCode = xErrorCode(CONSTRAINT) | (1 << 8)
+	CONSTRAINT_COMMITHOOK   ExtendedErrorCode = xErrorCode(CONSTRAINT) | (2 << 8)
+	CONSTRAINT_FOREIGNKEY   ExtendedErrorCode = xErrorCode(CONSTRAINT) | (3 << 8)
+	CONSTRAINT_FUNCTION     ExtendedErrorCode = xErrorCode(CONSTRAINT) | (4 << 8)
+	CONSTRAINT_NOTNULL      ExtendedErrorCode = xErrorCode(CONSTRAINT) | (5 << 8)
+	CONSTRAINT_PRIMARYKEY   ExtendedErrorCode = xErrorCode(CONSTRAINT) | (6 << 8)
+	CONSTRAINT_TRIGGER      ExtendedErrorCode = xErrorCode(CONSTRAINT) | (7 << 8)
+	CONSTRAINT_UNIQUE       ExtendedErrorCode = xErrorCode(CONSTRAINT) | (8 << 8)
+	CONSTRAINT_VTAB         ExtendedErrorCode = xErrorCode(CONSTRAINT) | (9 << 8)
+	CONSTRAINT_ROWID        ExtendedErrorCode = xErrorCode(CONSTRAINT) | (10 << 8)
+	CONSTRAINT_PINNED       ExtendedErrorCode = xErrorCode(CONSTRAINT) | (11 << 8)
+	CONSTRAINT_DATATYPE     ExtendedErrorCode = xErrorCode(CONSTRAINT) | (12 << 8)
+	NOTICE_RECOVER_WAL      ExtendedErrorCode = xErrorCode(NOTICE) | (1 << 8)
+	NOTICE_RECOVER_ROLLBACK ExtendedErrorCode = xErrorCode(NOTICE) | (2 << 8)
+	NOTICE_RBU              ExtendedErrorCode = xErrorCode(NOTICE) | (3 << 8)
+	WARNING_AUTOINDEX       ExtendedErrorCode = xErrorCode(WARNING) | (1 << 8)
+	AUTH_USER               ExtendedErrorCode = xErrorCode(AUTH) | (1 << 8)
+)
+
+// OpenFlag is a flag for the [OpenFlags] function.
+//
+// https://sqlite.org/c3ref/c_open_autoproxy.html
+type OpenFlag uint32
+
+const (
+	OPEN_READONLY     OpenFlag = 0x00000001 /* Ok for sqlite3_open_v2() */
+	OPEN_READWRITE    OpenFlag = 0x00000002 /* Ok for sqlite3_open_v2() */
+	OPEN_CREATE       OpenFlag = 0x00000004 /* Ok for sqlite3_open_v2() */
+	OPEN_URI          OpenFlag = 0x00000040 /* Ok for sqlite3_open_v2() */
+	OPEN_MEMORY       OpenFlag = 0x00000080 /* Ok for sqlite3_open_v2() */
+	OPEN_NOMUTEX      OpenFlag = 0x00008000 /* Ok for sqlite3_open_v2() */
+	OPEN_FULLMUTEX    OpenFlag = 0x00010000 /* Ok for sqlite3_open_v2() */
+	OPEN_SHAREDCACHE  OpenFlag = 0x00020000 /* Ok for sqlite3_open_v2() */
+	OPEN_PRIVATECACHE OpenFlag = 0x00040000 /* Ok for sqlite3_open_v2() */
+	OPEN_NOFOLLOW     OpenFlag = 0x01000000 /* Ok for sqlite3_open_v2() */
+	OPEN_EXRESCODE    OpenFlag = 0x02000000 /* Extended result codes */
+)
+
+// PrepareFlag is a flag that can be passed to [Conn.PrepareFlags].
+//
+// https://sqlite.org/c3ref/c_prepare_normalize.html
+type PrepareFlag uint32
+
+const (
+	PREPARE_PERSISTENT PrepareFlag = 0x01
+	PREPARE_NORMALIZE  PrepareFlag = 0x02
+	PREPARE_NO_VTAB    PrepareFlag = 0x04
+)
+
+// FunctionFlag is a flag that can be passed to
+// [Conn.CreateFunction] and [Conn.CreateWindowFunction].
+//
+// https://sqlite.org/c3ref/c_deterministic.html
+type FunctionFlag uint32
+
+const (
+	DETERMINISTIC  FunctionFlag = 0x000000800
+	DIRECTONLY     FunctionFlag = 0x000080000
+	SUBTYPE        FunctionFlag = 0x000100000
+	INNOCUOUS      FunctionFlag = 0x000200000
+	RESULT_SUBTYPE FunctionFlag = 0x001000000
+)
+
+// StmtStatus name counter values associated with the [Stmt.Status] method.
+//
+// https://sqlite.org/c3ref/c_stmtstatus_counter.html
+type StmtStatus uint32
+
+const (
+	STMTSTATUS_FULLSCAN_STEP StmtStatus = 1
+	STMTSTATUS_SORT          StmtStatus = 2
+	STMTSTATUS_AUTOINDEX     StmtStatus = 3
+	STMTSTATUS_VM_STEP       StmtStatus = 4
+	STMTSTATUS_REPREPARE     StmtStatus = 5
+	STMTSTATUS_RUN           StmtStatus = 6
+	STMTSTATUS_FILTER_MISS   StmtStatus = 7
+	STMTSTATUS_FILTER_HIT    StmtStatus = 8
+	STMTSTATUS_MEMUSED       StmtStatus = 99
+)
+
+// DBConfig are the available database connection configuration options.
+//
+// https://sqlite.org/c3ref/c_dbconfig_defensive.html
+type DBConfig uint32
+
+const (
+	// DBCONFIG_MAINDBNAME         DBConfig = 1000
+	// DBCONFIG_LOOKASIDE          DBConfig = 1001
+	DBCONFIG_ENABLE_FKEY           DBConfig = 1002
+	DBCONFIG_ENABLE_TRIGGER        DBConfig = 1003
+	DBCONFIG_ENABLE_FTS3_TOKENIZER DBConfig = 1004
+	DBCONFIG_ENABLE_LOAD_EXTENSION DBConfig = 1005
+	DBCONFIG_NO_CKPT_ON_CLOSE      DBConfig = 1006
+	DBCONFIG_ENABLE_QPSG           DBConfig = 1007
+	DBCONFIG_TRIGGER_EQP           DBConfig = 1008
+	DBCONFIG_RESET_DATABASE        DBConfig = 1009
+	DBCONFIG_DEFENSIVE             DBConfig = 1010
+	DBCONFIG_WRITABLE_SCHEMA       DBConfig = 1011
+	DBCONFIG_LEGACY_ALTER_TABLE    DBConfig = 1012
+	DBCONFIG_DQS_DML               DBConfig = 1013
+	DBCONFIG_DQS_DDL               DBConfig = 1014
+	DBCONFIG_ENABLE_VIEW           DBConfig = 1015
+	DBCONFIG_LEGACY_FILE_FORMAT    DBConfig = 1016
+	DBCONFIG_TRUSTED_SCHEMA        DBConfig = 1017
+	DBCONFIG_STMT_SCANSTATUS       DBConfig = 1018
+	DBCONFIG_REVERSE_SCANORDER     DBConfig = 1019
+)
+
+// LimitCategory are the available run-time limit categories.
+//
+// https://sqlite.org/c3ref/c_limit_attached.html
+type LimitCategory uint32
+
+const (
+	LIMIT_LENGTH              LimitCategory = 0
+	LIMIT_SQL_LENGTH          LimitCategory = 1
+	LIMIT_COLUMN              LimitCategory = 2
+	LIMIT_EXPR_DEPTH          LimitCategory = 3
+	LIMIT_COMPOUND_SELECT     LimitCategory = 4
+	LIMIT_VDBE_OP             LimitCategory = 5
+	LIMIT_FUNCTION_ARG        LimitCategory = 6
+	LIMIT_ATTACHED            LimitCategory = 7
+	LIMIT_LIKE_PATTERN_LENGTH LimitCategory = 8
+	LIMIT_VARIABLE_NUMBER     LimitCategory = 9
+	LIMIT_TRIGGER_DEPTH       LimitCategory = 10
+	LIMIT_WORKER_THREADS      LimitCategory = 11
+)
+
+// AuthorizerActionCode are the integer action codes
+// that the authorizer callback may be passed.
+//
+// https://sqlite.org/c3ref/c_alter_table.html
+type AuthorizerActionCode uint32
+
+const (
+	/***************************************************** 3rd ************ 4th ***********/
+	AUTH_CREATE_INDEX        AuthorizerActionCode = 1  /* Index Name      Table Name      */
+	AUTH_CREATE_TABLE        AuthorizerActionCode = 2  /* Table Name      NULL            */
+	AUTH_CREATE_TEMP_INDEX   AuthorizerActionCode = 3  /* Index Name      Table Name      */
+	AUTH_CREATE_TEMP_TABLE   AuthorizerActionCode = 4  /* Table Name      NULL            */
+	AUTH_CREATE_TEMP_TRIGGER AuthorizerActionCode = 5  /* Trigger Name    Table Name      */
+	AUTH_CREATE_TEMP_VIEW    AuthorizerActionCode = 6  /* View Name       NULL            */
+	AUTH_CREATE_TRIGGER      AuthorizerActionCode = 7  /* Trigger Name    Table Name      */
+	AUTH_CREATE_VIEW         AuthorizerActionCode = 8  /* View Name       NULL            */
+	AUTH_DELETE              AuthorizerActionCode = 9  /* Table Name      NULL            */
+	AUTH_DROP_INDEX          AuthorizerActionCode = 10 /* Index Name      Table Name      */
+	AUTH_DROP_TABLE          AuthorizerActionCode = 11 /* Table Name      NULL            */
+	AUTH_DROP_TEMP_INDEX     AuthorizerActionCode = 12 /* Index Name      Table Name      */
+	AUTH_DROP_TEMP_TABLE     AuthorizerActionCode = 13 /* Table Name      NULL            */
+	AUTH_DROP_TEMP_TRIGGER   AuthorizerActionCode = 14 /* Trigger Name    Table Name      */
+	AUTH_DROP_TEMP_VIEW      AuthorizerActionCode = 15 /* View Name       NULL            */
+	AUTH_DROP_TRIGGER        AuthorizerActionCode = 16 /* Trigger Name    Table Name      */
+	AUTH_DROP_VIEW           AuthorizerActionCode = 17 /* View Name       NULL            */
+	AUTH_INSERT              AuthorizerActionCode = 18 /* Table Name      NULL            */
+	AUTH_PRAGMA              AuthorizerActionCode = 19 /* Pragma Name     1st arg or NULL */
+	AUTH_READ                AuthorizerActionCode = 20 /* Table Name      Column Name     */
+	AUTH_SELECT              AuthorizerActionCode = 21 /* NULL            NULL            */
+	AUTH_TRANSACTION         AuthorizerActionCode = 22 /* Operation       NULL            */
+	AUTH_UPDATE              AuthorizerActionCode = 23 /* Table Name      Column Name     */
+	AUTH_ATTACH              AuthorizerActionCode = 24 /* Filename        NULL            */
+	AUTH_DETACH              AuthorizerActionCode = 25 /* Database Name   NULL            */
+	AUTH_ALTER_TABLE         AuthorizerActionCode = 26 /* Database Name   Table Name      */
+	AUTH_REINDEX             AuthorizerActionCode = 27 /* Index Name      NULL            */
+	AUTH_ANALYZE             AuthorizerActionCode = 28 /* Table Name      NULL            */
+	AUTH_CREATE_VTABLE       AuthorizerActionCode = 29 /* Table Name      Module Name     */
+	AUTH_DROP_VTABLE         AuthorizerActionCode = 30 /* Table Name      Module Name     */
+	AUTH_FUNCTION            AuthorizerActionCode = 31 /* NULL            Function Name   */
+	AUTH_SAVEPOINT           AuthorizerActionCode = 32 /* Operation       Savepoint Name  */
+	AUTH_COPY                AuthorizerActionCode = 0  /* No longer used */
+	AUTH_RECURSIVE           AuthorizerActionCode = 33 /* NULL            NULL            */
+)
+
+// AuthorizerReturnCode are the integer codes
+// that the authorizer callback may return.
+//
+// https://sqlite.org/c3ref/c_deny.html
+type AuthorizerReturnCode uint32
+
+const (
+	AUTH_OK     AuthorizerReturnCode = 0
+	AUTH_DENY   AuthorizerReturnCode = 1 /* Abort the SQL statement with an error */
+	AUTH_IGNORE AuthorizerReturnCode = 2 /* Don't allow access, but don't generate an error */
+)
+
+// CheckpointMode are all the checkpoint mode values.
+//
+// https://sqlite.org/c3ref/c_checkpoint_full.html
+type CheckpointMode uint32
+
+const (
+	CHECKPOINT_PASSIVE  CheckpointMode = 0 /* Do as much as possible w/o blocking */
+	CHECKPOINT_FULL     CheckpointMode = 1 /* Wait for writers, then checkpoint */
+	CHECKPOINT_RESTART  CheckpointMode = 2 /* Like FULL but wait for readers */
+	CHECKPOINT_TRUNCATE CheckpointMode = 3 /* Like RESTART but also truncate WAL */
+)
+
+// TxnState are the allowed return values from [Conn.TxnState].
+//
+// https://sqlite.org/c3ref/c_txn_none.html
+type TxnState uint32
+
+const (
+	TXN_NONE  TxnState = 0
+	TXN_READ  TxnState = 1
+	TXN_WRITE TxnState = 2
+)
+
+// Datatype is a fundamental datatype of SQLite.
+//
+// https://sqlite.org/c3ref/c_blob.html
+type Datatype uint32
+
+const (
+	INTEGER Datatype = 1
+	FLOAT   Datatype = 2
+	TEXT    Datatype = 3
+	BLOB    Datatype = 4
+	NULL    Datatype = 5
+)
+
+// String implements the [fmt.Stringer] interface.
+func (t Datatype) String() string {
+	const name = "INTEGERFLOATEXTBLOBNULL"
+	switch t {
+	case INTEGER:
+		return name[0:7]
+	case FLOAT:
+		return name[7:12]
+	case TEXT:
+		return name[11:15]
+	case BLOB:
+		return name[15:19]
+	case NULL:
+		return name[19:23]
+	}
+	return strconv.FormatUint(uint64(t), 10)
+}

vendor/github.com/ncruces/go-sqlite3/context.go

@@ -0,0 +1,229 @@
+package sqlite3
+
+import (
+	"encoding/json"
+	"errors"
+	"math"
+	"time"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
+
+// Context is the context in which an SQL function executes.
+// An SQLite [Context] is in no way related to a Go [context.Context].
+//
+// https://sqlite.org/c3ref/context.html
+type Context struct {
+	c      *Conn
+	handle uint32
+}
+
+// Conn returns the database connection of the
+// [Conn.CreateFunction] or [Conn.CreateWindowFunction]
+// routines that originally registered the application defined function.
+//
+// https://sqlite.org/c3ref/context_db_handle.html
+func (ctx Context) Conn() *Conn {
+	return ctx.c
+}
+
+// SetAuxData saves metadata for argument n of the function.
+//
+// https://sqlite.org/c3ref/get_auxdata.html
+func (ctx Context) SetAuxData(n int, data any) {
+	ptr := util.AddHandle(ctx.c.ctx, data)
+	ctx.c.call("sqlite3_set_auxdata_go", uint64(ctx.handle), uint64(n), uint64(ptr))
+}
+
+// GetAuxData returns metadata for argument n of the function.
+//
+// https://sqlite.org/c3ref/get_auxdata.html
+func (ctx Context) GetAuxData(n int) any {
+	ptr := uint32(ctx.c.call("sqlite3_get_auxdata", uint64(ctx.handle), uint64(n)))
+	return util.GetHandle(ctx.c.ctx, ptr)
+}
+
+// ResultBool sets the result of the function to a bool.
+// SQLite does not have a separate boolean storage class.
+// Instead, boolean values are stored as integers 0 (false) and 1 (true).
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultBool(value bool) {
+	var i int64
+	if value {
+		i = 1
+	}
+	ctx.ResultInt64(i)
+}
+
+// ResultInt sets the result of the function to an int.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultInt(value int) {
+	ctx.ResultInt64(int64(value))
+}
+
+// ResultInt64 sets the result of the function to an int64.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultInt64(value int64) {
+	ctx.c.call("sqlite3_result_int64",
+		uint64(ctx.handle), uint64(value))
+}
+
+// ResultFloat sets the result of the function to a float64.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultFloat(value float64) {
+	ctx.c.call("sqlite3_result_double",
+		uint64(ctx.handle), math.Float64bits(value))
+}
+
+// ResultText sets the result of the function to a string.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultText(value string) {
+	ptr := ctx.c.newString(value)
+	ctx.c.call("sqlite3_result_text64",
+		uint64(ctx.handle), uint64(ptr), uint64(len(value)),
+		uint64(ctx.c.freer), _UTF8)
+}
+
+// ResultRawText sets the text result of the function to a []byte.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultRawText(value []byte) {
+	ptr := ctx.c.newBytes(value)
+	ctx.c.call("sqlite3_result_text64",
+		uint64(ctx.handle), uint64(ptr), uint64(len(value)),
+		uint64(ctx.c.freer), _UTF8)
+}
+
+// ResultBlob sets the result of the function to a []byte.
+// Returning a nil slice is the same as calling [Context.ResultNull].
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultBlob(value []byte) {
+	ptr := ctx.c.newBytes(value)
+	ctx.c.call("sqlite3_result_blob64",
+		uint64(ctx.handle), uint64(ptr), uint64(len(value)),
+		uint64(ctx.c.freer))
+}
+
+// ResultZeroBlob sets the result of the function to a zero-filled, length n BLOB.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultZeroBlob(n int64) {
+	ctx.c.call("sqlite3_result_zeroblob64",
+		uint64(ctx.handle), uint64(n))
+}
+
+// ResultNull sets the result of the function to NULL.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultNull() {
+	ctx.c.call("sqlite3_result_null",
+		uint64(ctx.handle))
+}
+
+// ResultTime sets the result of the function to a [time.Time].
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultTime(value time.Time, format TimeFormat) {
+	if format == TimeFormatDefault {
+		ctx.resultRFC3339Nano(value)
+		return
+	}
+	switch v := format.Encode(value).(type) {
+	case string:
+		ctx.ResultText(v)
+	case int64:
+		ctx.ResultInt64(v)
+	case float64:
+		ctx.ResultFloat(v)
+	default:
+		panic(util.AssertErr())
+	}
+}
+
+func (ctx Context) resultRFC3339Nano(value time.Time) {
+	const maxlen = uint64(len(time.RFC3339Nano)) + 5
+
+	ptr := ctx.c.new(maxlen)
+	buf := util.View(ctx.c.mod, ptr, maxlen)
+	buf = value.AppendFormat(buf[:0], time.RFC3339Nano)
+
+	ctx.c.call("sqlite3_result_text64",
+		uint64(ctx.handle), uint64(ptr), uint64(len(buf)),
+		uint64(ctx.c.freer), _UTF8)
+}
+
+// ResultPointer sets the result of the function to NULL, just like [Context.ResultNull],
+// except that it also associates ptr with that NULL value such that it can be retrieved
+// within an application-defined SQL function using [Value.Pointer].
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultPointer(ptr any) {
+	valPtr := util.AddHandle(ctx.c.ctx, ptr)
+	ctx.c.call("sqlite3_result_pointer_go", uint64(valPtr))
+}
+
+// ResultJSON sets the result of the function to the JSON encoding of value.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultJSON(value any) {
+	data, err := json.Marshal(value)
+	if err != nil {
+		ctx.ResultError(err)
+		return
+	}
+	ctx.ResultRawText(data)
+}
+
+// ResultValue sets the result of the function to a copy of [Value].
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultValue(value Value) {
+	if value.c != ctx.c {
+		ctx.ResultError(MISUSE)
+		return
+	}
+	ctx.c.call("sqlite3_result_value",
+		uint64(ctx.handle), uint64(value.handle))
+}
+
+// ResultError sets the result of the function an error.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultError(err error) {
+	if errors.Is(err, NOMEM) {
+		ctx.c.call("sqlite3_result_error_nomem", uint64(ctx.handle))
+		return
+	}
+
+	if errors.Is(err, TOOBIG) {
+		ctx.c.call("sqlite3_result_error_toobig", uint64(ctx.handle))
+		return
+	}
+
+	msg, code := errorCode(err, _OK)
+	if msg != "" {
+		defer ctx.c.arena.mark()()
+		ptr := ctx.c.arena.string(msg)
+		ctx.c.call("sqlite3_result_error",
+			uint64(ctx.handle), uint64(ptr), uint64(len(msg)))
+	}
+	if code != _OK {
+		ctx.c.call("sqlite3_result_error_code",
+			uint64(ctx.handle), uint64(code))
+	}
+}
+
+// VTabNoChange may return true if a column is being fetched as part
+// of an update during which the column value will not change.
+//
+// https://sqlite.org/c3ref/vtab_nochange.html
+func (ctx Context) VTabNoChange() bool {
+	r := ctx.c.call("sqlite3_vtab_nochange", uint64(ctx.handle))
+	return r != 0
+}

vendor/github.com/ncruces/go-sqlite3/driver/driver.go

@@ -0,0 +1,579 @@
+// Package driver provides a database/sql driver for SQLite.
+//
+// Importing package driver registers a [database/sql] driver named "sqlite3".
+// You may also need to import package embed.
+//
+//	import _ "github.com/ncruces/go-sqlite3/driver"
+//	import _ "github.com/ncruces/go-sqlite3/embed"
+//
+// The data source name for "sqlite3" databases can be a filename or a "file:" [URI].
+//
+// The [TRANSACTION] mode can be specified using "_txlock":
+//
+//	sql.Open("sqlite3", "file:demo.db?_txlock=immediate")
+//
+// Possible values are: "deferred", "immediate", "exclusive".
+// A [read-only] transaction is always "deferred", regardless of "_txlock".
+//
+// The time encoding/decoding format can be specified using "_timefmt":
+//
+//	sql.Open("sqlite3", "file:demo.db?_timefmt=sqlite")
+//
+// Possible values are: "auto" (the default), "sqlite", "rfc3339";
+// "auto" encodes as RFC 3339 and decodes any [format] supported by SQLite;
+// "sqlite" encodes as SQLite and decodes any [format] supported by SQLite;
+// "rfc3339" encodes and decodes RFC 3339 only.
+//
+// [PRAGMA] statements can be specified using "_pragma":
+//
+//	sql.Open("sqlite3", "file:demo.db?_pragma=busy_timeout(10000)")
+//
+// If no PRAGMAs are specified, a busy timeout of 1 minute is set.
+//
+// Order matters:
+// busy timeout and locking mode should be the first PRAGMAs set, in that order.
+//
+// [URI]: https://sqlite.org/uri.html
+// [PRAGMA]: https://sqlite.org/pragma.html
+// [format]: https://sqlite.org/lang_datefunc.html#time_values
+// [TRANSACTION]: https://sqlite.org/lang_transaction.html#deferred_immediate_and_exclusive_transactions
+// [read-only]: https://pkg.go.dev/database/sql#TxOptions
+package driver
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"errors"
+	"fmt"
+	"io"
+	"net/url"
+	"strings"
+	"time"
+	"unsafe"
+
+	"github.com/ncruces/go-sqlite3"
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
+
+// This variable can be replaced with -ldflags:
+//
+//	go build -ldflags="-X github.com/ncruces/go-sqlite3/driver.driverName=sqlite"
+var driverName = "sqlite3"
+
+func init() {
+	if driverName != "" {
+		sql.Register(driverName, &SQLite{})
+	}
+}
+
+// Open opens the SQLite database specified by dataSourceName as a [database/sql.DB].
+//
+// The init function is called by the driver on new connections.
+// The [sqlite3.Conn] can be used to execute queries, register functions, etc.
+// Any error returned closes the connection and is returned to [database/sql].
+func Open(dataSourceName string, init func(*sqlite3.Conn) error) (*sql.DB, error) {
+	c, err := (&SQLite{Init: init}).OpenConnector(dataSourceName)
+	if err != nil {
+		return nil, err
+	}
+	return sql.OpenDB(c), nil
+}
+
+// SQLite implements [database/sql/driver.Driver].
+type SQLite struct {
+	// Init function is called by the driver on new connections.
+	// The [sqlite3.Conn] can be used to execute queries, register functions, etc.
+	// Any error returned closes the connection and is returned to [database/sql].
+	Init func(*sqlite3.Conn) error
+}
+
+// Open implements [database/sql/driver.Driver].
+func (d *SQLite) Open(name string) (driver.Conn, error) {
+	c, err := d.newConnector(name)
+	if err != nil {
+		return nil, err
+	}
+	return c.Connect(context.Background())
+}
+
+// OpenConnector implements [database/sql/driver.DriverContext].
+func (d *SQLite) OpenConnector(name string) (driver.Connector, error) {
+	return d.newConnector(name)
+}
+
+func (d *SQLite) newConnector(name string) (*connector, error) {
+	c := connector{driver: d, name: name}
+
+	var txlock, timefmt string
+	if strings.HasPrefix(name, "file:") {
+		if _, after, ok := strings.Cut(name, "?"); ok {
+			query, err := url.ParseQuery(after)
+			if err != nil {
+				return nil, err
+			}
+			txlock = query.Get("_txlock")
+			timefmt = query.Get("_timefmt")
+			c.pragmas = query.Has("_pragma")
+		}
+	}
+
+	switch txlock {
+	case "":
+		c.txBegin = "BEGIN"
+	case "deferred", "immediate", "exclusive":
+		c.txBegin = "BEGIN " + txlock
+	default:
+		return nil, fmt.Errorf("sqlite3: invalid _txlock: %s", txlock)
+	}
+
+	switch timefmt {
+	case "":
+		c.tmRead = sqlite3.TimeFormatAuto
+		c.tmWrite = sqlite3.TimeFormatDefault
+	case "sqlite":
+		c.tmRead = sqlite3.TimeFormatAuto
+		c.tmWrite = sqlite3.TimeFormat3
+	case "rfc3339":
+		c.tmRead = sqlite3.TimeFormatDefault
+		c.tmWrite = sqlite3.TimeFormatDefault
+	default:
+		c.tmRead = sqlite3.TimeFormat(timefmt)
+		c.tmWrite = sqlite3.TimeFormat(timefmt)
+	}
+	return &c, nil
+}
+
+type connector struct {
+	driver  *SQLite
+	name    string
+	txBegin string
+	tmRead  sqlite3.TimeFormat
+	tmWrite sqlite3.TimeFormat
+	pragmas bool
+}
+
+func (n *connector) Driver() driver.Driver {
+	return n.driver
+}
+
+func (n *connector) Connect(ctx context.Context) (_ driver.Conn, err error) {
+	c := &conn{
+		txBegin: n.txBegin,
+		tmRead:  n.tmRead,
+		tmWrite: n.tmWrite,
+	}
+
+	c.Conn, err = sqlite3.Open(n.name)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if err != nil {
+			c.Close()
+		}
+	}()
+
+	old := c.Conn.SetInterrupt(ctx)
+	defer c.Conn.SetInterrupt(old)
+
+	if !n.pragmas {
+		err = c.Conn.BusyTimeout(60 * time.Second)
+		if err != nil {
+			return nil, err
+		}
+	}
+	if n.driver.Init != nil {
+		err = n.driver.Init(c.Conn)
+		if err != nil {
+			return nil, err
+		}
+	}
+	if n.pragmas || n.driver.Init != nil {
+		s, _, err := c.Conn.Prepare(`PRAGMA query_only`)
+		if err != nil {
+			return nil, err
+		}
+		if s.Step() && s.ColumnBool(0) {
+			c.readOnly = '1'
+		} else {
+			c.readOnly = '0'
+		}
+		err = s.Close()
+		if err != nil {
+			return nil, err
+		}
+	}
+	return c, nil
+}
+
+type conn struct {
+	*sqlite3.Conn
+	txBegin    string
+	txCommit   string
+	txRollback string
+	tmRead     sqlite3.TimeFormat
+	tmWrite    sqlite3.TimeFormat
+	readOnly   byte
+}
+
+var (
+	// Ensure these interfaces are implemented:
+	_ driver.ConnPrepareContext = &conn{}
+	_ driver.ExecerContext      = &conn{}
+	_ driver.ConnBeginTx        = &conn{}
+	_ sqlite3.DriverConn        = &conn{}
+)
+
+func (c *conn) Raw() *sqlite3.Conn {
+	return c.Conn
+}
+
+func (c *conn) Begin() (driver.Tx, error) {
+	return c.BeginTx(context.Background(), driver.TxOptions{})
+}
+
+func (c *conn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
+	txBegin := c.txBegin
+	c.txCommit = `COMMIT`
+	c.txRollback = `ROLLBACK`
+
+	if opts.ReadOnly {
+		txBegin = `
+			BEGIN deferred;
+			PRAGMA query_only=on`
+		c.txRollback = `
+			ROLLBACK;
+			PRAGMA query_only=` + string(c.readOnly)
+		c.txCommit = c.txRollback
+	}
+
+	switch opts.Isolation {
+	default:
+		return nil, util.IsolationErr
+	case
+		driver.IsolationLevel(sql.LevelDefault),
+		driver.IsolationLevel(sql.LevelSerializable):
+		break
+	}
+
+	old := c.Conn.SetInterrupt(ctx)
+	defer c.Conn.SetInterrupt(old)
+
+	err := c.Conn.Exec(txBegin)
+	if err != nil {
+		return nil, err
+	}
+	return c, nil
+}
+
+func (c *conn) Commit() error {
+	err := c.Conn.Exec(c.txCommit)
+	if err != nil && !c.Conn.GetAutocommit() {
+		c.Rollback()
+	}
+	return err
+}
+
+func (c *conn) Rollback() error {
+	err := c.Conn.Exec(c.txRollback)
+	if errors.Is(err, sqlite3.INTERRUPT) {
+		old := c.Conn.SetInterrupt(context.Background())
+		defer c.Conn.SetInterrupt(old)
+		err = c.Conn.Exec(c.txRollback)
+	}
+	return err
+}
+
+func (c *conn) Prepare(query string) (driver.Stmt, error) {
+	return c.PrepareContext(context.Background(), query)
+}
+
+func (c *conn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
+	old := c.Conn.SetInterrupt(ctx)
+	defer c.Conn.SetInterrupt(old)
+
+	s, tail, err := c.Conn.Prepare(query)
+	if err != nil {
+		return nil, err
+	}
+	if tail != "" {
+		s.Close()
+		return nil, util.TailErr
+	}
+	return &stmt{Stmt: s, tmRead: c.tmRead, tmWrite: c.tmWrite}, nil
+}
+
+func (c *conn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
+	if len(args) != 0 {
+		// Slow path.
+		return nil, driver.ErrSkip
+	}
+
+	if savept, ok := ctx.(*saveptCtx); ok {
+		// Called from driver.Savepoint.
+		savept.Savepoint = c.Conn.Savepoint()
+		return resultRowsAffected(0), nil
+	}
+
+	old := c.Conn.SetInterrupt(ctx)
+	defer c.Conn.SetInterrupt(old)
+
+	err := c.Conn.Exec(query)
+	if err != nil {
+		return nil, err
+	}
+
+	return newResult(c.Conn), nil
+}
+
+func (c *conn) CheckNamedValue(arg *driver.NamedValue) error {
+	return nil
+}
+
+type stmt struct {
+	*sqlite3.Stmt
+	tmWrite sqlite3.TimeFormat
+	tmRead  sqlite3.TimeFormat
+}
+
+var (
+	// Ensure these interfaces are implemented:
+	_ driver.StmtExecContext   = &stmt{}
+	_ driver.StmtQueryContext  = &stmt{}
+	_ driver.NamedValueChecker = &stmt{}
+)
+
+func (s *stmt) NumInput() int {
+	n := s.Stmt.BindCount()
+	for i := 1; i <= n; i++ {
+		if s.Stmt.BindName(i) != "" {
+			return -1
+		}
+	}
+	return n
+}
+
+// Deprecated: use ExecContext instead.
+func (s *stmt) Exec(args []driver.Value) (driver.Result, error) {
+	return s.ExecContext(context.Background(), namedValues(args))
+}
+
+// Deprecated: use QueryContext instead.
+func (s *stmt) Query(args []driver.Value) (driver.Rows, error) {
+	return s.QueryContext(context.Background(), namedValues(args))
+}
+
+func (s *stmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
+	err := s.setupBindings(args)
+	if err != nil {
+		return nil, err
+	}
+
+	old := s.Stmt.Conn().SetInterrupt(ctx)
+	defer s.Stmt.Conn().SetInterrupt(old)
+
+	err = s.Stmt.Exec()
+	if err != nil {
+		return nil, err
+	}
+
+	return newResult(s.Stmt.Conn()), nil
+}
+
+func (s *stmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
+	err := s.setupBindings(args)
+	if err != nil {
+		return nil, err
+	}
+	return &rows{ctx: ctx, stmt: s}, nil
+}
+
+func (s *stmt) setupBindings(args []driver.NamedValue) error {
+	err := s.Stmt.ClearBindings()
+	if err != nil {
+		return err
+	}
+
+	var ids [3]int
+	for _, arg := range args {
+		ids := ids[:0]
+		if arg.Name == "" {
+			ids = append(ids, arg.Ordinal)
+		} else {
+			for _, prefix := range []string{":", "@", "$"} {
+				if id := s.Stmt.BindIndex(prefix + arg.Name); id != 0 {
+					ids = append(ids, id)
+				}
+			}
+		}
+
+		for _, id := range ids {
+			switch a := arg.Value.(type) {
+			case bool:
+				err = s.Stmt.BindBool(id, a)
+			case int:
+				err = s.Stmt.BindInt(id, a)
+			case int64:
+				err = s.Stmt.BindInt64(id, a)
+			case float64:
+				err = s.Stmt.BindFloat(id, a)
+			case string:
+				err = s.Stmt.BindText(id, a)
+			case []byte:
+				err = s.Stmt.BindBlob(id, a)
+			case sqlite3.ZeroBlob:
+				err = s.Stmt.BindZeroBlob(id, int64(a))
+			case time.Time:
+				err = s.Stmt.BindTime(id, a, s.tmWrite)
+			case util.JSON:
+				err = s.Stmt.BindJSON(id, a.Value)
+			case util.PointerUnwrap:
+				err = s.Stmt.BindPointer(id, util.UnwrapPointer(a))
+			case nil:
+				err = s.Stmt.BindNull(id)
+			default:
+				panic(util.AssertErr())
+			}
+		}
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *stmt) CheckNamedValue(arg *driver.NamedValue) error {
+	switch arg.Value.(type) {
+	case bool, int, int64, float64, string, []byte,
+		time.Time, sqlite3.ZeroBlob,
+		util.JSON, util.PointerUnwrap,
+		nil:
+		return nil
+	default:
+		return driver.ErrSkip
+	}
+}
+
+func newResult(c *sqlite3.Conn) driver.Result {
+	rows := c.Changes()
+	if rows != 0 {
+		id := c.LastInsertRowID()
+		if id != 0 {
+			return result{id, rows}
+		}
+	}
+	return resultRowsAffected(rows)
+}
+
+type result struct{ lastInsertId, rowsAffected int64 }
+
+func (r result) LastInsertId() (int64, error) {
+	return r.lastInsertId, nil
+}
+
+func (r result) RowsAffected() (int64, error) {
+	return r.rowsAffected, nil
+}
+
+type resultRowsAffected int64
+
+func (r resultRowsAffected) LastInsertId() (int64, error) {
+	return 0, nil
+}
+
+func (r resultRowsAffected) RowsAffected() (int64, error) {
+	return int64(r), nil
+}
+
+type rows struct {
+	ctx context.Context
+	*stmt
+	names []string
+	types []string
+}
+
+func (r *rows) Close() error {
+	r.Stmt.ClearBindings()
+	return r.Stmt.Reset()
+}
+
+func (r *rows) Columns() []string {
+	if r.names == nil {
+		count := r.Stmt.ColumnCount()
+		r.names = make([]string, count)
+		for i := range r.names {
+			r.names[i] = r.Stmt.ColumnName(i)
+		}
+	}
+	return r.names
+}
+
+func (r *rows) declType(index int) string {
+	if r.types == nil {
+		count := r.Stmt.ColumnCount()
+		r.types = make([]string, count)
+		for i := range r.types {
+			r.types[i] = strings.ToUpper(r.Stmt.ColumnDeclType(i))
+		}
+	}
+	return r.types[index]
+}
+
+func (r *rows) ColumnTypeDatabaseTypeName(index int) string {
+	decltype := r.declType(index)
+	if len := len(decltype); len > 0 && decltype[len-1] == ')' {
+		if i := strings.LastIndexByte(decltype, '('); i >= 0 {
+			decltype = decltype[:i]
+		}
+	}
+	return strings.TrimSpace(decltype)
+}
+
+func (r *rows) Next(dest []driver.Value) error {
+	old := r.Stmt.Conn().SetInterrupt(r.ctx)
+	defer r.Stmt.Conn().SetInterrupt(old)
+
+	if !r.Stmt.Step() {
+		if err := r.Stmt.Err(); err != nil {
+			return err
+		}
+		return io.EOF
+	}
+
+	data := unsafe.Slice((*any)(unsafe.SliceData(dest)), len(dest))
+	err := r.Stmt.Columns(data)
+	for i := range dest {
+		if t, ok := r.decodeTime(i, dest[i]); ok {
+			dest[i] = t
+			continue
+		}
+		if s, ok := dest[i].(string); ok {
+			t, ok := maybeTime(s)
+			if ok {
+				dest[i] = t
+			}
+		}
+	}
+	return err
+}
+
+func (r *rows) decodeTime(i int, v any) (_ time.Time, _ bool) {
+	if r.tmRead == sqlite3.TimeFormatDefault {
+		return
+	}
+	switch r.declType(i) {
+	case "DATE", "TIME", "DATETIME", "TIMESTAMP":
+		// maybe
+	default:
+		return
+	}
+	switch v.(type) {
+	case int64, float64, string:
+		// maybe
+	default:
+		return
+	}
+	t, err := r.tmRead.Decode(v)
+	return t, err == nil
+}

vendor/github.com/ncruces/go-sqlite3/driver/savepoint.go

@@ -0,0 +1,27 @@
+package driver
+
+import (
+	"database/sql"
+	"time"
+
+	"github.com/ncruces/go-sqlite3"
+)
+
+// Savepoint establishes a new transaction savepoint.
+//
+// https://sqlite.org/lang_savepoint.html
+func Savepoint(tx *sql.Tx) sqlite3.Savepoint {
+	var ctx saveptCtx
+	tx.ExecContext(&ctx, "")
+	return ctx.Savepoint
+}
+
+type saveptCtx struct{ sqlite3.Savepoint }
+
+func (*saveptCtx) Deadline() (deadline time.Time, ok bool) { return }
+
+func (*saveptCtx) Done() <-chan struct{} { return nil }
+
+func (*saveptCtx) Err() error { return nil }
+
+func (*saveptCtx) Value(key any) any { return nil }

vendor/github.com/ncruces/go-sqlite3/driver/time.go

@@ -0,0 +1,31 @@
+package driver
+
+import (
+	"time"
+)
+
+// Convert a string in [time.RFC3339Nano] format into a [time.Time]
+// if it roundtrips back to the same string.
+// This way times can be persisted to, and recovered from, the database,
+// but if a string is needed, [database/sql] will recover the same string.
+func maybeTime(text string) (_ time.Time, _ bool) {
+	// Weed out (some) values that can't possibly be
+	// [time.RFC3339Nano] timestamps.
+	if len(text) < len("2006-01-02T15:04:05Z") {
+		return
+	}
+	if len(text) > len(time.RFC3339Nano) {
+		return
+	}
+	if text[4] != '-' || text[10] != 'T' || text[16] != ':' {
+		return
+	}
+
+	// Slow path.
+	var buf [len(time.RFC3339Nano)]byte
+	date, err := time.Parse(time.RFC3339Nano, text)
+	if err == nil && text == string(date.AppendFormat(buf[:0], time.RFC3339Nano)) {
+		return date, true
+	}
+	return
+}

vendor/github.com/ncruces/go-sqlite3/driver/util.go

@@ -0,0 +1,14 @@
+package driver
+
+import "database/sql/driver"
+
+func namedValues(args []driver.Value) []driver.NamedValue {
+	named := make([]driver.NamedValue, len(args))
+	for i, v := range args {
+		named[i] = driver.NamedValue{
+			Ordinal: i + 1,
+			Value:   v,
+		}
+	}
+	return named
+}

vendor/github.com/ncruces/go-sqlite3/embed/README.md

@@ -0,0 +1,27 @@
+# Embeddable Wasm build of SQLite
+
+This folder includes an embeddable Wasm build of SQLite 3.46.0 for use with
+[`github.com/ncruces/go-sqlite3`](https://pkg.go.dev/github.com/ncruces/go-sqlite3).
+
+The following optional features are compiled in:
+- [math functions](https://sqlite.org/lang_mathfunc.html)
+- [FTS5](https://sqlite.org/fts5.html)
+- [JSON](https://sqlite.org/json1.html)
+- [R*Tree](https://sqlite.org/rtree.html)
+- [GeoPoly](https://sqlite.org/geopoly.html)
+- [soundex](https://sqlite.org/lang_corefunc.html#soundex)
+- [stat4](https://sqlite.org/compile.html#enable_stat4)
+- [base64](https://github.com/sqlite/sqlite/blob/master/ext/misc/base64.c)
+- [decimal](https://github.com/sqlite/sqlite/blob/master/ext/misc/decimal.c)
+- [ieee754](https://github.com/sqlite/sqlite/blob/master/ext/misc/ieee754.c)
+- [regexp](https://github.com/sqlite/sqlite/blob/master/ext/misc/regexp.c)
+- [series](https://github.com/sqlite/sqlite/blob/master/ext/misc/series.c)
+- [uint](https://github.com/sqlite/sqlite/blob/master/ext/misc/uint.c)
+- [uuid](https://github.com/sqlite/sqlite/blob/master/ext/misc/uuid.c)
+- [time](../sqlite3/time.c)
+
+See the [configuration options](../sqlite3/sqlite_cfg.h),
+and [patches](../sqlite3) applied.
+
+Built using [`wasi-sdk`](https://github.com/WebAssembly/wasi-sdk),
+and [`binaryen`](https://github.com/WebAssembly/binaryen).

vendor/github.com/ncruces/go-sqlite3/embed/build.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cd -P -- "$(dirname -- "$0")"
+
+ROOT=../
+BINARYEN="$ROOT/tools/binaryen-version_117/bin"
+WASI_SDK="$ROOT/tools/wasi-sdk-22.0/bin"
+
+"$WASI_SDK/clang" --target=wasm32-wasi -std=c17 -flto -g0 -O2 \
+	-Wall -Wextra -Wno-unused-parameter -Wno-unused-function \
+	-o sqlite3.wasm "$ROOT/sqlite3/main.c" \
+	-I"$ROOT/sqlite3" \
+	-mexec-model=reactor \
+	-msimd128 -mmutable-globals \
+	-mbulk-memory -mreference-types \
+	-mnontrapping-fptoint -msign-ext \
+	-fno-stack-protector -fno-stack-clash-protection \
+	-Wl,--initial-memory=327680 \
+	-Wl,--stack-first \
+	-Wl,--import-undefined \
+	-D_HAVE_SQLITE_CONFIG_H \
+	-DSQLITE_CUSTOM_INCLUDE=sqlite_opt.h \
+	$(awk '{print "-Wl,--export="$0}' exports.txt)
+
+trap 'rm -f sqlite3.tmp' EXIT
+"$BINARYEN/wasm-ctor-eval" -g -c _initialize sqlite3.wasm -o sqlite3.tmp
+"$BINARYEN/wasm-opt" -g --strip --strip-producers -c -O3 \
+	sqlite3.tmp -o sqlite3.wasm \
+	--enable-simd --enable-mutable-globals --enable-multivalue \
+	--enable-bulk-memory --enable-reference-types \
+	--enable-nontrapping-float-to-int --enable-sign-ext

vendor/github.com/ncruces/go-sqlite3/embed/exports.txt

@@ -0,0 +1,130 @@
+aligned_alloc
+free
+malloc
+malloc_destructor
+sqlite3_anycollseq_init
+sqlite3_autovacuum_pages_go
+sqlite3_backup_finish
+sqlite3_backup_init
+sqlite3_backup_pagecount
+sqlite3_backup_remaining
+sqlite3_backup_step
+sqlite3_bind_blob64
+sqlite3_bind_double
+sqlite3_bind_int64
+sqlite3_bind_null
+sqlite3_bind_parameter_count
+sqlite3_bind_parameter_index
+sqlite3_bind_parameter_name
+sqlite3_bind_pointer_go
+sqlite3_bind_text64
+sqlite3_bind_value
+sqlite3_bind_zeroblob64
+sqlite3_blob_bytes
+sqlite3_blob_close
+sqlite3_blob_open
+sqlite3_blob_read
+sqlite3_blob_reopen
+sqlite3_blob_write
+sqlite3_busy_handler_go
+sqlite3_busy_timeout
+sqlite3_changes64
+sqlite3_clear_bindings
+sqlite3_close
+sqlite3_close_v2
+sqlite3_collation_needed_go
+sqlite3_column_blob
+sqlite3_column_bytes
+sqlite3_column_count
+sqlite3_column_database_name
+sqlite3_column_decltype
+sqlite3_column_double
+sqlite3_column_int64
+sqlite3_column_name
+sqlite3_column_origin_name
+sqlite3_column_table_name
+sqlite3_column_text
+sqlite3_column_type
+sqlite3_column_value
+sqlite3_columns_go
+sqlite3_commit_hook_go
+sqlite3_config_log_go
+sqlite3_create_aggregate_function_go
+sqlite3_create_collation_go
+sqlite3_create_function_go
+sqlite3_create_module_go
+sqlite3_create_window_function_go
+sqlite3_database_file_object
+sqlite3_db_config
+sqlite3_db_filename
+sqlite3_db_name
+sqlite3_db_readonly
+sqlite3_db_release_memory
+sqlite3_declare_vtab
+sqlite3_errcode
+sqlite3_errmsg
+sqlite3_error_offset
+sqlite3_errstr
+sqlite3_exec
+sqlite3_filename_database
+sqlite3_filename_journal
+sqlite3_filename_wal
+sqlite3_finalize
+sqlite3_get_autocommit
+sqlite3_get_auxdata
+sqlite3_interrupt
+sqlite3_last_insert_rowid
+sqlite3_limit
+sqlite3_open_v2
+sqlite3_overload_function
+sqlite3_prepare_v3
+sqlite3_progress_handler_go
+sqlite3_reset
+sqlite3_result_blob64
+sqlite3_result_double
+sqlite3_result_error
+sqlite3_result_error_code
+sqlite3_result_error_nomem
+sqlite3_result_error_toobig
+sqlite3_result_int64
+sqlite3_result_null
+sqlite3_result_pointer_go
+sqlite3_result_text64
+sqlite3_result_value
+sqlite3_result_zeroblob64
+sqlite3_rollback_hook_go
+sqlite3_set_authorizer_go
+sqlite3_set_auxdata_go
+sqlite3_set_last_insert_rowid
+sqlite3_step
+sqlite3_stmt_busy
+sqlite3_stmt_readonly
+sqlite3_stmt_status
+sqlite3_total_changes64
+sqlite3_txn_state
+sqlite3_update_hook_go
+sqlite3_uri_key
+sqlite3_uri_parameter
+sqlite3_value_blob
+sqlite3_value_bytes
+sqlite3_value_double
+sqlite3_value_dup
+sqlite3_value_free
+sqlite3_value_int64
+sqlite3_value_nochange
+sqlite3_value_numeric_type
+sqlite3_value_pointer_go
+sqlite3_value_text
+sqlite3_value_type
+sqlite3_vtab_collation
+sqlite3_vtab_config_go
+sqlite3_vtab_distinct
+sqlite3_vtab_in
+sqlite3_vtab_in_first
+sqlite3_vtab_in_next
+sqlite3_vtab_nochange
+sqlite3_vtab_on_conflict
+sqlite3_vtab_rhs_value
+sqlite3_wal_autocheckpoint
+sqlite3_wal_checkpoint_v2
+sqlite3_wal_hook_go

vendor/github.com/ncruces/go-sqlite3/embed/init.go

@@ -0,0 +1,20 @@
+// Package embed embeds SQLite into your application.
+//
+// Importing package embed initializes the [sqlite3.Binary] variable
+// with an appropriate build of SQLite:
+//
+//	import _ "github.com/ncruces/go-sqlite3/embed"
+package embed
+
+import (
+	_ "embed"
+
+	"github.com/ncruces/go-sqlite3"
+)
+
+//go:embed sqlite3.wasm
+var binary []byte
+
+func init() {
+	sqlite3.Binary = binary
+}

vendor/github.com/ncruces/go-sqlite3/error.go

@@ -0,0 +1,162 @@
+package sqlite3
+
+import (
+	"errors"
+	"strconv"
+	"strings"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
+
+// Error wraps an SQLite Error Code.
+//
+// https://sqlite.org/c3ref/errcode.html
+type Error struct {
+	str  string
+	msg  string
+	sql  string
+	code uint64
+}
+
+// Code returns the primary error code for this error.
+//
+// https://sqlite.org/rescode.html
+func (e *Error) Code() ErrorCode {
+	return ErrorCode(e.code)
+}
+
+// ExtendedCode returns the extended error code for this error.
+//
+// https://sqlite.org/rescode.html
+func (e *Error) ExtendedCode() ExtendedErrorCode {
+	return ExtendedErrorCode(e.code)
+}
+
+// Error implements the error interface.
+func (e *Error) Error() string {
+	var b strings.Builder
+	b.WriteString("sqlite3: ")
+
+	if e.str != "" {
+		b.WriteString(e.str)
+	} else {
+		b.WriteString(strconv.Itoa(int(e.code)))
+	}
+
+	if e.msg != "" {
+		b.WriteString(": ")
+		b.WriteString(e.msg)
+	}
+
+	return b.String()
+}
+
+// Is tests whether this error matches a given [ErrorCode] or [ExtendedErrorCode].
+//
+// It makes it possible to do:
+//
+//	if errors.Is(err, sqlite3.BUSY) {
+//		// ... handle BUSY
+//	}
+func (e *Error) Is(err error) bool {
+	switch c := err.(type) {
+	case ErrorCode:
+		return c == e.Code()
+	case ExtendedErrorCode:
+		return c == e.ExtendedCode()
+	}
+	return false
+}
+
+// As converts this error to an [ErrorCode] or [ExtendedErrorCode].
+func (e *Error) As(err any) bool {
+	switch c := err.(type) {
+	case *ErrorCode:
+		*c = e.Code()
+		return true
+	case *ExtendedErrorCode:
+		*c = e.ExtendedCode()
+		return true
+	}
+	return false
+}
+
+// Temporary returns true for [BUSY] errors.
+func (e *Error) Temporary() bool {
+	return e.Code() == BUSY
+}
+
+// Timeout returns true for [BUSY_TIMEOUT] errors.
+func (e *Error) Timeout() bool {
+	return e.ExtendedCode() == BUSY_TIMEOUT
+}
+
+// SQL returns the SQL starting at the token that triggered a syntax error.
+func (e *Error) SQL() string {
+	return e.sql
+}
+
+// Error implements the error interface.
+func (e ErrorCode) Error() string {
+	return util.ErrorCodeString(uint32(e))
+}
+
+// Temporary returns true for [BUSY] errors.
+func (e ErrorCode) Temporary() bool {
+	return e == BUSY
+}
+
+// Error implements the error interface.
+func (e ExtendedErrorCode) Error() string {
+	return util.ErrorCodeString(uint32(e))
+}
+
+// Is tests whether this error matches a given [ErrorCode].
+func (e ExtendedErrorCode) Is(err error) bool {
+	c, ok := err.(ErrorCode)
+	return ok && c == ErrorCode(e)
+}
+
+// As converts this error to an [ErrorCode].
+func (e ExtendedErrorCode) As(err any) bool {
+	c, ok := err.(*ErrorCode)
+	if ok {
+		*c = ErrorCode(e)
+	}
+	return ok
+}
+
+// Temporary returns true for [BUSY] errors.
+func (e ExtendedErrorCode) Temporary() bool {
+	return ErrorCode(e) == BUSY
+}
+
+// Timeout returns true for [BUSY_TIMEOUT] errors.
+func (e ExtendedErrorCode) Timeout() bool {
+	return e == BUSY_TIMEOUT
+}
+
+func errorCode(err error, def ErrorCode) (msg string, code uint32) {
+	switch code := err.(type) {
+	case nil:
+		return "", _OK
+	case ErrorCode:
+		return "", uint32(code)
+	case xErrorCode:
+		return "", uint32(code)
+	case *Error:
+		return code.msg, uint32(code.code)
+	}
+
+	var ecode ErrorCode
+	var xcode xErrorCode
+	switch {
+	case errors.As(err, &xcode):
+		code = uint32(xcode)
+	case errors.As(err, &ecode):
+		code = uint32(ecode)
+	default:
+		code = uint32(def)
+	}
+	return err.Error(), code
+}

vendor/github.com/ncruces/go-sqlite3/func.go

@@ -0,0 +1,214 @@
+package sqlite3
+
+import (
+	"context"
+	"sync"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+	"github.com/tetratelabs/wazero/api"
+)
+
+// CollationNeeded registers a callback to be invoked
+// whenever an unknown collation sequence is required.
+//
+// https://sqlite.org/c3ref/collation_needed.html
+func (c *Conn) CollationNeeded(cb func(db *Conn, name string)) error {
+	var enable uint64
+	if cb != nil {
+		enable = 1
+	}
+	r := c.call("sqlite3_collation_needed_go", uint64(c.handle), enable)
+	if err := c.error(r); err != nil {
+		return err
+	}
+	c.collation = cb
+	return nil
+}
+
+// AnyCollationNeeded uses [Conn.CollationNeeded] to register
+// a fake collating function for any unknown collating sequence.
+// The fake collating function works like BINARY.
+//
+// This can be used to load schemas that contain
+// one or more unknown collating sequences.
+func (c *Conn) AnyCollationNeeded() {
+	c.call("sqlite3_anycollseq_init", uint64(c.handle), 0, 0)
+}
+
+// CreateCollation defines a new collating sequence.
+//
+// https://sqlite.org/c3ref/create_collation.html
+func (c *Conn) CreateCollation(name string, fn func(a, b []byte) int) error {
+	defer c.arena.mark()()
+	namePtr := c.arena.string(name)
+	funcPtr := util.AddHandle(c.ctx, fn)
+	r := c.call("sqlite3_create_collation_go",
+		uint64(c.handle), uint64(namePtr), uint64(funcPtr))
+	return c.error(r)
+}
+
+// CreateFunction defines a new scalar SQL function.
+//
+// https://sqlite.org/c3ref/create_function.html
+func (c *Conn) CreateFunction(name string, nArg int, flag FunctionFlag, fn ScalarFunction) error {
+	defer c.arena.mark()()
+	namePtr := c.arena.string(name)
+	funcPtr := util.AddHandle(c.ctx, fn)
+	r := c.call("sqlite3_create_function_go",
+		uint64(c.handle), uint64(namePtr), uint64(nArg),
+		uint64(flag), uint64(funcPtr))
+	return c.error(r)
+}
+
+// ScalarFunction is the type of a scalar SQL function.
+// Implementations must not retain arg.
+type ScalarFunction func(ctx Context, arg ...Value)
+
+// CreateWindowFunction defines a new aggregate or aggregate window SQL function.
+// If fn returns a [WindowFunction], then an aggregate window function is created.
+// If fn returns an [io.Closer], it will be called to free resources.
+//
+// https://sqlite.org/c3ref/create_function.html
+func (c *Conn) CreateWindowFunction(name string, nArg int, flag FunctionFlag, fn func() AggregateFunction) error {
+	defer c.arena.mark()()
+	call := "sqlite3_create_aggregate_function_go"
+	namePtr := c.arena.string(name)
+	funcPtr := util.AddHandle(c.ctx, fn)
+	if _, ok := fn().(WindowFunction); ok {
+		call = "sqlite3_create_window_function_go"
+	}
+	r := c.call(call,
+		uint64(c.handle), uint64(namePtr), uint64(nArg),
+		uint64(flag), uint64(funcPtr))
+	return c.error(r)
+}
+
+// AggregateFunction is the interface an aggregate function should implement.
+//
+// https://sqlite.org/appfunc.html
+type AggregateFunction interface {
+	// Step is invoked to add a row to the current window.
+	// The function arguments, if any, corresponding to the row being added, are passed to Step.
+	// Implementations must not retain arg.
+	Step(ctx Context, arg ...Value)
+
+	// Value is invoked to return the current (or final) value of the aggregate.
+	Value(ctx Context)
+}
+
+// WindowFunction is the interface an aggregate window function should implement.
+//
+// https://sqlite.org/windowfunctions.html
+type WindowFunction interface {
+	AggregateFunction
+
+	// Inverse is invoked to remove the oldest presently aggregated result of Step from the current window.
+	// The function arguments, if any, are those passed to Step for the row being removed.
+	// Implementations must not retain arg.
+	Inverse(ctx Context, arg ...Value)
+}
+
+// OverloadFunction overloads a function for a virtual table.
+//
+// https://sqlite.org/c3ref/overload_function.html
+func (c *Conn) OverloadFunction(name string, nArg int) error {
+	defer c.arena.mark()()
+	namePtr := c.arena.string(name)
+	r := c.call("sqlite3_overload_function",
+		uint64(c.handle), uint64(namePtr), uint64(nArg))
+	return c.error(r)
+}
+
+func destroyCallback(ctx context.Context, mod api.Module, pApp uint32) {
+	util.DelHandle(ctx, pApp)
+}
+
+func collationCallback(ctx context.Context, mod api.Module, pArg, pDB, eTextRep, zName uint32) {
+	if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.collation != nil {
+		name := util.ReadString(mod, zName, _MAX_NAME)
+		c.collation(c, name)
+	}
+}
+
+func compareCallback(ctx context.Context, mod api.Module, pApp, nKey1, pKey1, nKey2, pKey2 uint32) uint32 {
+	fn := util.GetHandle(ctx, pApp).(func(a, b []byte) int)
+	return uint32(fn(util.View(mod, pKey1, uint64(nKey1)), util.View(mod, pKey2, uint64(nKey2))))
+}
+
+func funcCallback(ctx context.Context, mod api.Module, pCtx, pApp, nArg, pArg uint32) {
+	args := getFuncArgs()
+	defer putFuncArgs(args)
+	db := ctx.Value(connKey{}).(*Conn)
+	fn := util.GetHandle(db.ctx, pApp).(ScalarFunction)
+	callbackArgs(db, args[:nArg], pArg)
+	fn(Context{db, pCtx}, args[:nArg]...)
+}
+
+func stepCallback(ctx context.Context, mod api.Module, pCtx, pAgg, pApp, nArg, pArg uint32) {
+	args := getFuncArgs()
+	defer putFuncArgs(args)
+	db := ctx.Value(connKey{}).(*Conn)
+	callbackArgs(db, args[:nArg], pArg)
+	fn, _ := callbackAggregate(db, pAgg, pApp)
+	fn.Step(Context{db, pCtx}, args[:nArg]...)
+}
+
+func finalCallback(ctx context.Context, mod api.Module, pCtx, pAgg, pApp uint32) {
+	db := ctx.Value(connKey{}).(*Conn)
+	fn, handle := callbackAggregate(db, pAgg, pApp)
+	fn.Value(Context{db, pCtx})
+	util.DelHandle(ctx, handle)
+}
+
+func valueCallback(ctx context.Context, mod api.Module, pCtx, pAgg uint32) {
+	db := ctx.Value(connKey{}).(*Conn)
+	fn := util.GetHandle(db.ctx, pAgg).(AggregateFunction)
+	fn.Value(Context{db, pCtx})
+}
+
+func inverseCallback(ctx context.Context, mod api.Module, pCtx, pAgg, nArg, pArg uint32) {
+	args := getFuncArgs()
+	defer putFuncArgs(args)
+	db := ctx.Value(connKey{}).(*Conn)
+	callbackArgs(db, args[:nArg], pArg)
+	fn := util.GetHandle(db.ctx, pAgg).(WindowFunction)
+	fn.Inverse(Context{db, pCtx}, args[:nArg]...)
+}
+
+func callbackAggregate(db *Conn, pAgg, pApp uint32) (AggregateFunction, uint32) {
+	if pApp == 0 {
+		handle := util.ReadUint32(db.mod, pAgg)
+		return util.GetHandle(db.ctx, handle).(AggregateFunction), handle
+	}
+
+	// We need to create the aggregate.
+	fn := util.GetHandle(db.ctx, pApp).(func() AggregateFunction)()
+	handle := util.AddHandle(db.ctx, fn)
+	if pAgg != 0 {
+		util.WriteUint32(db.mod, pAgg, handle)
+	}
+	return fn, handle
+}
+
+func callbackArgs(db *Conn, arg []Value, pArg uint32) {
+	for i := range arg {
+		arg[i] = Value{
+			c:      db,
+			handle: util.ReadUint32(db.mod, pArg+ptrlen*uint32(i)),
+		}
+	}
+}
+
+var funcArgsPool sync.Pool
+
+func putFuncArgs(p *[_MAX_FUNCTION_ARG]Value) {
+	funcArgsPool.Put(p)
+}
+
+func getFuncArgs() *[_MAX_FUNCTION_ARG]Value {
+	if p := funcArgsPool.Get(); p == nil {
+		return new([_MAX_FUNCTION_ARG]Value)
+	} else {
+		return p.(*[_MAX_FUNCTION_ARG]Value)
+	}
+}

vendor/github.com/ncruces/go-sqlite3/go.work

@@ -0,0 +1,6 @@
+go 1.21
+
+use (
+	.
+	./gormlite
+)

vendor/github.com/ncruces/go-sqlite3/go.work.sum

@@ -0,0 +1,9 @@
+golang.org/x/mod v0.8.0 h1:LUYupSeNrTNCGzR/hVBk2NHZO4hXcVaW1k4Qx7rjPx8=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
+golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
+golang.org/x/term v0.19.0 h1:+ThwsDv+tYfnJFhF4L8jITxu1tdTWRTZpdsWgEgjL6Q=
+golang.org/x/term v0.19.0/go.mod h1:2CuTdWZ7KHSQwUzKva0cbMg6q2DMI3Mmxp+gKJbskEk=
+golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
+golang.org/x/tools v0.6.0 h1:BOw41kyTf3PuCW1pVQf8+Cyg8pMlkYB1oo9iJ6D/lKM=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=

vendor/github.com/ncruces/go-sqlite3/internal/util/alloc_other.go

@@ -0,0 +1,9 @@
+//go:build !(unix || windows) || sqlite3_nosys
+
+package util
+
+import "github.com/tetratelabs/wazero/experimental"
+
+func virtualAlloc(cap, max uint64) experimental.LinearMemory {
+	return sliceAlloc(cap, max)
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/alloc_slice.go

@@ -0,0 +1,25 @@
+//go:build !(darwin || linux) || !(amd64 || arm64 || riscv64) || sqlite3_noshm || sqlite3_nosys
+
+package util
+
+import "github.com/tetratelabs/wazero/experimental"
+
+func sliceAlloc(cap, max uint64) experimental.LinearMemory {
+	return &sliceBuffer{make([]byte, cap), max}
+}
+
+type sliceBuffer struct {
+	buf []byte
+	max uint64
+}
+
+func (b *sliceBuffer) Free() {}
+
+func (b *sliceBuffer) Reallocate(size uint64) []byte {
+	if cap := uint64(cap(b.buf)); size > cap {
+		b.buf = append(b.buf[:cap], make([]byte, size-cap)...)
+	} else {
+		b.buf = b.buf[:size]
+	}
+	return b.buf
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/alloc_unix.go

@@ -0,0 +1,67 @@
+//go:build unix && !sqlite3_nosys
+
+package util
+
+import (
+	"math"
+
+	"github.com/tetratelabs/wazero/experimental"
+	"golang.org/x/sys/unix"
+)
+
+func virtualAlloc(cap, max uint64) experimental.LinearMemory {
+	// Round up to the page size.
+	rnd := uint64(unix.Getpagesize() - 1)
+	max = (max + rnd) &^ rnd
+
+	if max > math.MaxInt {
+		// This ensures int(max) overflows to a negative value,
+		// and unix.Mmap returns EINVAL.
+		max = math.MaxUint64
+	}
+
+	// Reserve max bytes of address space, to ensure we won't need to move it.
+	// A protected, private, anonymous mapping should not commit memory.
+	b, err := unix.Mmap(-1, 0, int(max), unix.PROT_NONE, unix.MAP_PRIVATE|unix.MAP_ANON)
+	if err != nil {
+		panic(err)
+	}
+	return &mmappedMemory{buf: b[:0]}
+}
+
+// The slice covers the entire mmapped memory:
+//   - len(buf) is the already committed memory,
+//   - cap(buf) is the reserved address space.
+type mmappedMemory struct {
+	buf []byte
+}
+
+func (m *mmappedMemory) Reallocate(size uint64) []byte {
+	com := uint64(len(m.buf))
+	res := uint64(cap(m.buf))
+	if com < size && size < res {
+		// Round up to the page size.
+		rnd := uint64(unix.Getpagesize() - 1)
+		new := (size + rnd) &^ rnd
+
+		// Commit additional memory up to new bytes.
+		err := unix.Mprotect(m.buf[com:new], unix.PROT_READ|unix.PROT_WRITE)
+		if err != nil {
+			panic(err)
+		}
+
+		// Update committed memory.
+		m.buf = m.buf[:new]
+	}
+	// Limit returned capacity because bytes beyond
+	// len(m.buf) have not yet been committed.
+	return m.buf[:size:len(m.buf)]
+}
+
+func (m *mmappedMemory) Free() {
+	err := unix.Munmap(m.buf[:cap(m.buf)])
+	if err != nil {
+		panic(err)
+	}
+	m.buf = nil
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/alloc_windows.go

@@ -0,0 +1,76 @@
+//go:build !sqlite3_nosys
+
+package util
+
+import (
+	"math"
+	"reflect"
+	"unsafe"
+
+	"github.com/tetratelabs/wazero/experimental"
+	"golang.org/x/sys/windows"
+)
+
+func virtualAlloc(cap, max uint64) experimental.LinearMemory {
+	// Round up to the page size.
+	rnd := uint64(windows.Getpagesize() - 1)
+	max = (max + rnd) &^ rnd
+
+	if max > math.MaxInt {
+		// This ensures uintptr(max) overflows to a large value,
+		// and windows.VirtualAlloc returns an error.
+		max = math.MaxUint64
+	}
+
+	// Reserve max bytes of address space, to ensure we won't need to move it.
+	// This does not commit memory.
+	r, err := windows.VirtualAlloc(0, uintptr(max), windows.MEM_RESERVE, windows.PAGE_READWRITE)
+	if err != nil {
+		panic(err)
+	}
+
+	mem := virtualMemory{addr: r}
+	// SliceHeader, although deprecated, avoids a go vet warning.
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&mem.buf))
+	sh.Cap = int(max) // Not a bug.
+	sh.Data = r
+	return &mem
+}
+
+// The slice covers the entire mmapped memory:
+//   - len(buf) is the already committed memory,
+//   - cap(buf) is the reserved address space.
+type virtualMemory struct {
+	buf  []byte
+	addr uintptr
+}
+
+func (m *virtualMemory) Reallocate(size uint64) []byte {
+	com := uint64(len(m.buf))
+	res := uint64(cap(m.buf))
+	if com < size && size < res {
+		// Round up to the page size.
+		rnd := uint64(windows.Getpagesize() - 1)
+		new := (size + rnd) &^ rnd
+
+		// Commit additional memory up to new bytes.
+		_, err := windows.VirtualAlloc(m.addr, uintptr(new), windows.MEM_COMMIT, windows.PAGE_READWRITE)
+		if err != nil {
+			panic(err)
+		}
+
+		// Update committed memory.
+		m.buf = m.buf[:new]
+	}
+	// Limit returned capacity because bytes beyond
+	// len(m.buf) have not yet been committed.
+	return m.buf[:size:len(m.buf)]
+}
+
+func (m *virtualMemory) Free() {
+	err := windows.VirtualFree(m.addr, 0, windows.MEM_RELEASE)
+	if err != nil {
+		panic(err)
+	}
+	m.addr = 0
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/bool.go

@@ -0,0 +1,22 @@
+package util
+
+import "strings"
+
+func ParseBool(s string) (b, ok bool) {
+	if len(s) == 0 {
+		return false, false
+	}
+	if s[0] == '0' {
+		return false, true
+	}
+	if '1' <= s[0] && s[0] <= '9' {
+		return true, true
+	}
+	switch strings.ToLower(s) {
+	case "true", "yes", "on":
+		return true, true
+	case "false", "no", "off":
+		return false, true
+	}
+	return false, false
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/const.go

@@ -0,0 +1,117 @@
+package util
+
+// https://sqlite.com/matrix/rescode.html
+const (
+	OK = 0 /* Successful result */
+
+	ERROR      = 1  /* Generic error */
+	INTERNAL   = 2  /* Internal logic error in SQLite */
+	PERM       = 3  /* Access permission denied */
+	ABORT      = 4  /* Callback routine requested an abort */
+	BUSY       = 5  /* The database file is locked */
+	LOCKED     = 6  /* A table in the database is locked */
+	NOMEM      = 7  /* A malloc() failed */
+	READONLY   = 8  /* Attempt to write a readonly database */
+	INTERRUPT  = 9  /* Operation terminated by sqlite3_interrupt() */
+	IOERR      = 10 /* Some kind of disk I/O error occurred */
+	CORRUPT    = 11 /* The database disk image is malformed */
+	NOTFOUND   = 12 /* Unknown opcode in sqlite3_file_control() */
+	FULL       = 13 /* Insertion failed because database is full */
+	CANTOPEN   = 14 /* Unable to open the database file */
+	PROTOCOL   = 15 /* Database lock protocol error */
+	EMPTY      = 16 /* Internal use only */
+	SCHEMA     = 17 /* The database schema changed */
+	TOOBIG     = 18 /* String or BLOB exceeds size limit */
+	CONSTRAINT = 19 /* Abort due to constraint violation */
+	MISMATCH   = 20 /* Data type mismatch */
+	MISUSE     = 21 /* Library used incorrectly */
+	NOLFS      = 22 /* Uses OS features not supported on host */
+	AUTH       = 23 /* Authorization denied */
+	FORMAT     = 24 /* Not used */
+	RANGE      = 25 /* 2nd parameter to sqlite3_bind out of range */
+	NOTADB     = 26 /* File opened that is not a database file */
+	NOTICE     = 27 /* Notifications from sqlite3_log() */
+	WARNING    = 28 /* Warnings from sqlite3_log() */
+
+	ROW  = 100 /* sqlite3_step() has another row ready */
+	DONE = 101 /* sqlite3_step() has finished executing */
+
+	ERROR_MISSING_COLLSEQ   = ERROR | (1 << 8)
+	ERROR_RETRY             = ERROR | (2 << 8)
+	ERROR_SNAPSHOT          = ERROR | (3 << 8)
+	IOERR_READ              = IOERR | (1 << 8)
+	IOERR_SHORT_READ        = IOERR | (2 << 8)
+	IOERR_WRITE             = IOERR | (3 << 8)
+	IOERR_FSYNC             = IOERR | (4 << 8)
+	IOERR_DIR_FSYNC         = IOERR | (5 << 8)
+	IOERR_TRUNCATE          = IOERR | (6 << 8)
+	IOERR_FSTAT             = IOERR | (7 << 8)
+	IOERR_UNLOCK            = IOERR | (8 << 8)
+	IOERR_RDLOCK            = IOERR | (9 << 8)
+	IOERR_DELETE            = IOERR | (10 << 8)
+	IOERR_BLOCKED           = IOERR | (11 << 8)
+	IOERR_NOMEM             = IOERR | (12 << 8)
+	IOERR_ACCESS            = IOERR | (13 << 8)
+	IOERR_CHECKRESERVEDLOCK = IOERR | (14 << 8)
+	IOERR_LOCK              = IOERR | (15 << 8)
+	IOERR_CLOSE             = IOERR | (16 << 8)
+	IOERR_DIR_CLOSE         = IOERR | (17 << 8)
+	IOERR_SHMOPEN           = IOERR | (18 << 8)
+	IOERR_SHMSIZE           = IOERR | (19 << 8)
+	IOERR_SHMLOCK           = IOERR | (20 << 8)
+	IOERR_SHMMAP            = IOERR | (21 << 8)
+	IOERR_SEEK              = IOERR | (22 << 8)
+	IOERR_DELETE_NOENT      = IOERR | (23 << 8)
+	IOERR_MMAP              = IOERR | (24 << 8)
+	IOERR_GETTEMPPATH       = IOERR | (25 << 8)
+	IOERR_CONVPATH          = IOERR | (26 << 8)
+	IOERR_VNODE             = IOERR | (27 << 8)
+	IOERR_AUTH              = IOERR | (28 << 8)
+	IOERR_BEGIN_ATOMIC      = IOERR | (29 << 8)
+	IOERR_COMMIT_ATOMIC     = IOERR | (30 << 8)
+	IOERR_ROLLBACK_ATOMIC   = IOERR | (31 << 8)
+	IOERR_DATA              = IOERR | (32 << 8)
+	IOERR_CORRUPTFS         = IOERR | (33 << 8)
+	IOERR_IN_PAGE           = IOERR | (34 << 8)
+	LOCKED_SHAREDCACHE      = LOCKED | (1 << 8)
+	LOCKED_VTAB             = LOCKED | (2 << 8)
+	BUSY_RECOVERY           = BUSY | (1 << 8)
+	BUSY_SNAPSHOT           = BUSY | (2 << 8)
+	BUSY_TIMEOUT            = BUSY | (3 << 8)
+	CANTOPEN_NOTEMPDIR      = CANTOPEN | (1 << 8)
+	CANTOPEN_ISDIR          = CANTOPEN | (2 << 8)
+	CANTOPEN_FULLPATH       = CANTOPEN | (3 << 8)
+	CANTOPEN_CONVPATH       = CANTOPEN | (4 << 8)
+	CANTOPEN_DIRTYWAL       = CANTOPEN | (5 << 8) /* Not Used */
+	CANTOPEN_SYMLINK        = CANTOPEN | (6 << 8)
+	CORRUPT_VTAB            = CORRUPT | (1 << 8)
+	CORRUPT_SEQUENCE        = CORRUPT | (2 << 8)
+	CORRUPT_INDEX           = CORRUPT | (3 << 8)
+	READONLY_RECOVERY       = READONLY | (1 << 8)
+	READONLY_CANTLOCK       = READONLY | (2 << 8)
+	READONLY_ROLLBACK       = READONLY | (3 << 8)
+	READONLY_DBMOVED        = READONLY | (4 << 8)
+	READONLY_CANTINIT       = READONLY | (5 << 8)
+	READONLY_DIRECTORY      = READONLY | (6 << 8)
+	ABORT_ROLLBACK          = ABORT | (2 << 8)
+	CONSTRAINT_CHECK        = CONSTRAINT | (1 << 8)
+	CONSTRAINT_COMMITHOOK   = CONSTRAINT | (2 << 8)
+	CONSTRAINT_FOREIGNKEY   = CONSTRAINT | (3 << 8)
+	CONSTRAINT_FUNCTION     = CONSTRAINT | (4 << 8)
+	CONSTRAINT_NOTNULL      = CONSTRAINT | (5 << 8)
+	CONSTRAINT_PRIMARYKEY   = CONSTRAINT | (6 << 8)
+	CONSTRAINT_TRIGGER      = CONSTRAINT | (7 << 8)
+	CONSTRAINT_UNIQUE       = CONSTRAINT | (8 << 8)
+	CONSTRAINT_VTAB         = CONSTRAINT | (9 << 8)
+	CONSTRAINT_ROWID        = CONSTRAINT | (10 << 8)
+	CONSTRAINT_PINNED       = CONSTRAINT | (11 << 8)
+	CONSTRAINT_DATATYPE     = CONSTRAINT | (12 << 8)
+	NOTICE_RECOVER_WAL      = NOTICE | (1 << 8)
+	NOTICE_RECOVER_ROLLBACK = NOTICE | (2 << 8)
+	NOTICE_RBU              = NOTICE | (3 << 8)
+	WARNING_AUTOINDEX       = WARNING | (1 << 8)
+	AUTH_USER               = AUTH | (1 << 8)
+
+	OK_LOAD_PERMANENTLY = OK | (1 << 8)
+	OK_SYMLINK          = OK | (2 << 8) /* internal use only */
+)

vendor/github.com/ncruces/go-sqlite3/internal/util/error.go

@@ -0,0 +1,106 @@
+package util
+
+import (
+	"runtime"
+	"strconv"
+)
+
+type ErrorString string
+
+func (e ErrorString) Error() string { return string(e) }
+
+const (
+	NilErr       = ErrorString("sqlite3: invalid memory address or null pointer dereference")
+	OOMErr       = ErrorString("sqlite3: out of memory")
+	RangeErr     = ErrorString("sqlite3: index out of range")
+	NoNulErr     = ErrorString("sqlite3: missing NUL terminator")
+	NoBinaryErr  = ErrorString("sqlite3: no SQLite binary embed/set/loaded")
+	BadBinaryErr = ErrorString("sqlite3: invalid SQLite binary embed/set/loaded")
+	TimeErr      = ErrorString("sqlite3: invalid time value")
+	WhenceErr    = ErrorString("sqlite3: invalid whence")
+	OffsetErr    = ErrorString("sqlite3: invalid offset")
+	TailErr      = ErrorString("sqlite3: multiple statements")
+	IsolationErr = ErrorString("sqlite3: unsupported isolation level")
+	ValueErr     = ErrorString("sqlite3: unsupported value")
+	NoVFSErr     = ErrorString("sqlite3: no such vfs: ")
+)
+
+func AssertErr() ErrorString {
+	msg := "sqlite3: assertion failed"
+	if _, file, line, ok := runtime.Caller(1); ok {
+		msg += " (" + file + ":" + strconv.Itoa(line) + ")"
+	}
+	return ErrorString(msg)
+}
+
+func ErrorCodeString(rc uint32) string {
+	switch rc {
+	case ABORT_ROLLBACK:
+		return "sqlite3: abort due to ROLLBACK"
+	case ROW:
+		return "sqlite3: another row available"
+	case DONE:
+		return "sqlite3: no more rows available"
+	}
+	switch rc & 0xff {
+	case OK:
+		return "sqlite3: not an error"
+	case ERROR:
+		return "sqlite3: SQL logic error"
+	case INTERNAL:
+		break
+	case PERM:
+		return "sqlite3: access permission denied"
+	case ABORT:
+		return "sqlite3: query aborted"
+	case BUSY:
+		return "sqlite3: database is locked"
+	case LOCKED:
+		return "sqlite3: database table is locked"
+	case NOMEM:
+		return "sqlite3: out of memory"
+	case READONLY:
+		return "sqlite3: attempt to write a readonly database"
+	case INTERRUPT:
+		return "sqlite3: interrupted"
+	case IOERR:
+		return "sqlite3: disk I/O error"
+	case CORRUPT:
+		return "sqlite3: database disk image is malformed"
+	case NOTFOUND:
+		return "sqlite3: unknown operation"
+	case FULL:
+		return "sqlite3: database or disk is full"
+	case CANTOPEN:
+		return "sqlite3: unable to open database file"
+	case PROTOCOL:
+		return "sqlite3: locking protocol"
+	case FORMAT:
+		break
+	case SCHEMA:
+		return "sqlite3: database schema has changed"
+	case TOOBIG:
+		return "sqlite3: string or blob too big"
+	case CONSTRAINT:
+		return "sqlite3: constraint failed"
+	case MISMATCH:
+		return "sqlite3: datatype mismatch"
+	case MISUSE:
+		return "sqlite3: bad parameter or other API misuse"
+	case NOLFS:
+		break
+	case AUTH:
+		return "sqlite3: authorization denied"
+	case EMPTY:
+		break
+	case RANGE:
+		return "sqlite3: column index out of range"
+	case NOTADB:
+		return "sqlite3: file is not a database"
+	case NOTICE:
+		return "sqlite3: notification message"
+	case WARNING:
+		return "sqlite3: warning message"
+	}
+	return "sqlite3: unknown error"
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/func.go

@@ -0,0 +1,193 @@
+package util
+
+import (
+	"context"
+
+	"github.com/tetratelabs/wazero"
+	"github.com/tetratelabs/wazero/api"
+)
+
+type i32 interface{ ~int32 | ~uint32 }
+type i64 interface{ ~int64 | ~uint64 }
+
+type funcVI[T0 i32] func(context.Context, api.Module, T0)
+
+func (fn funcVI[T0]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	fn(ctx, mod, T0(stack[0]))
+}
+
+func ExportFuncVI[T0 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0)) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcVI[T0](fn),
+			[]api.ValueType{api.ValueTypeI32}, nil).
+		Export(name)
+}
+
+type funcVII[T0, T1 i32] func(context.Context, api.Module, T0, T1)
+
+func (fn funcVII[T0, T1]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	fn(ctx, mod, T0(stack[0]), T1(stack[1]))
+}
+
+func ExportFuncVII[T0, T1 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1)) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcVII[T0, T1](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32}, nil).
+		Export(name)
+}
+
+type funcVIII[T0, T1, T2 i32] func(context.Context, api.Module, T0, T1, T2)
+
+func (fn funcVIII[T0, T1, T2]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]))
+}
+
+func ExportFuncVIII[T0, T1, T2 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2)) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcVIII[T0, T1, T2](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, nil).
+		Export(name)
+}
+
+type funcVIIII[T0, T1, T2, T3 i32] func(context.Context, api.Module, T0, T1, T2, T3)
+
+func (fn funcVIIII[T0, T1, T2, T3]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3]))
+}
+
+func ExportFuncVIIII[T0, T1, T2, T3 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3)) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcVIIII[T0, T1, T2, T3](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, nil).
+		Export(name)
+}
+
+type funcVIIIII[T0, T1, T2, T3, T4 i32] func(context.Context, api.Module, T0, T1, T2, T3, T4)
+
+func (fn funcVIIIII[T0, T1, T2, T3, T4]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3]), T4(stack[4]))
+}
+
+func ExportFuncVIIIII[T0, T1, T2, T3, T4 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3, T4)) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcVIIIII[T0, T1, T2, T3, T4](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, nil).
+		Export(name)
+}
+
+type funcVIIIIJ[T0, T1, T2, T3 i32, T4 i64] func(context.Context, api.Module, T0, T1, T2, T3, T4)
+
+func (fn funcVIIIIJ[T0, T1, T2, T3, T4]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3]), T4(stack[4]))
+}
+
+func ExportFuncVIIIIJ[T0, T1, T2, T3 i32, T4 i64](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3, T4)) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcVIIIIJ[T0, T1, T2, T3, T4](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI64}, nil).
+		Export(name)
+}
+
+type funcII[TR, T0 i32] func(context.Context, api.Module, T0) TR
+
+func (fn funcII[TR, T0]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	stack[0] = uint64(fn(ctx, mod, T0(stack[0])))
+}
+
+func ExportFuncII[TR, T0 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0) TR) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcII[TR, T0](fn),
+			[]api.ValueType{api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
+		Export(name)
+}
+
+type funcIII[TR, T0, T1 i32] func(context.Context, api.Module, T0, T1) TR
+
+func (fn funcIII[TR, T0, T1]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1])))
+}
+
+func ExportFuncIII[TR, T0, T1 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1) TR) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcIII[TR, T0, T1](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
+		Export(name)
+}
+
+type funcIIII[TR, T0, T1, T2 i32] func(context.Context, api.Module, T0, T1, T2) TR
+
+func (fn funcIIII[TR, T0, T1, T2]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2])))
+}
+
+func ExportFuncIIII[TR, T0, T1, T2 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2) TR) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcIIII[TR, T0, T1, T2](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
+		Export(name)
+}
+
+type funcIIIII[TR, T0, T1, T2, T3 i32] func(context.Context, api.Module, T0, T1, T2, T3) TR
+
+func (fn funcIIIII[TR, T0, T1, T2, T3]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3])))
+}
+
+func ExportFuncIIIII[TR, T0, T1, T2, T3 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3) TR) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcIIIII[TR, T0, T1, T2, T3](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
+		Export(name)
+}
+
+type funcIIIIII[TR, T0, T1, T2, T3, T4 i32] func(context.Context, api.Module, T0, T1, T2, T3, T4) TR
+
+func (fn funcIIIIII[TR, T0, T1, T2, T3, T4]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3]), T4(stack[4])))
+}
+
+func ExportFuncIIIIII[TR, T0, T1, T2, T3, T4 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3, T4) TR) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcIIIIII[TR, T0, T1, T2, T3, T4](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
+		Export(name)
+}
+
+type funcIIIIIII[TR, T0, T1, T2, T3, T4, T5 i32] func(context.Context, api.Module, T0, T1, T2, T3, T4, T5) TR
+
+func (fn funcIIIIIII[TR, T0, T1, T2, T3, T4, T5]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3]), T4(stack[4]), T5(stack[5])))
+}
+
+func ExportFuncIIIIIII[TR, T0, T1, T2, T3, T4, T5 i32](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3, T4, T5) TR) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcIIIIIII[TR, T0, T1, T2, T3, T4, T5](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32}, []api.ValueType{api.ValueTypeI32}).
+		Export(name)
+}
+
+type funcIIIIJ[TR, T0, T1, T2 i32, T3 i64] func(context.Context, api.Module, T0, T1, T2, T3) TR
+
+func (fn funcIIIIJ[TR, T0, T1, T2, T3]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1]), T2(stack[2]), T3(stack[3])))
+}
+
+func ExportFuncIIIIJ[TR, T0, T1, T2 i32, T3 i64](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1, T2, T3) TR) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcIIIIJ[TR, T0, T1, T2, T3](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI32, api.ValueTypeI64}, []api.ValueType{api.ValueTypeI32}).
+		Export(name)
+}
+
+type funcIIJ[TR, T0 i32, T1 i64] func(context.Context, api.Module, T0, T1) TR
+
+func (fn funcIIJ[TR, T0, T1]) Call(ctx context.Context, mod api.Module, stack []uint64) {
+	stack[0] = uint64(fn(ctx, mod, T0(stack[0]), T1(stack[1])))
+}
+
+func ExportFuncIIJ[TR, T0 i32, T1 i64](mod wazero.HostModuleBuilder, name string, fn func(context.Context, api.Module, T0, T1) TR) {
+	mod.NewFunctionBuilder().
+		WithGoModuleFunction(funcIIJ[TR, T0, T1](fn),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI64}, []api.ValueType{api.ValueTypeI32}).
+		Export(name)
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/handle.go

@@ -0,0 +1,65 @@
+package util
+
+import (
+	"context"
+	"io"
+)
+
+type handleState struct {
+	handles []any
+	holes   int
+}
+
+func (s *handleState) CloseNotify(ctx context.Context, exitCode uint32) {
+	for _, h := range s.handles {
+		if c, ok := h.(io.Closer); ok {
+			c.Close()
+		}
+	}
+	s.handles = nil
+	s.holes = 0
+}
+
+func GetHandle(ctx context.Context, id uint32) any {
+	if id == 0 {
+		return nil
+	}
+	s := ctx.Value(moduleKey{}).(*moduleState)
+	return s.handles[^id]
+}
+
+func DelHandle(ctx context.Context, id uint32) error {
+	if id == 0 {
+		return nil
+	}
+	s := ctx.Value(moduleKey{}).(*moduleState)
+	a := s.handles[^id]
+	s.handles[^id] = nil
+	s.holes++
+	if c, ok := a.(io.Closer); ok {
+		return c.Close()
+	}
+	return nil
+}
+
+func AddHandle(ctx context.Context, a any) (id uint32) {
+	if a == nil {
+		panic(NilErr)
+	}
+	s := ctx.Value(moduleKey{}).(*moduleState)
+
+	// Find an empty slot.
+	if s.holes > cap(s.handles)-len(s.handles) {
+		for id, h := range s.handles {
+			if h == nil {
+				s.holes--
+				s.handles[id] = a
+				return ^uint32(id)
+			}
+		}
+	}
+
+	// Add a new slot.
+	s.handles = append(s.handles, a)
+	return -uint32(len(s.handles))
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/json.go

@@ -0,0 +1,35 @@
+package util
+
+import (
+	"encoding/json"
+	"strconv"
+	"time"
+	"unsafe"
+)
+
+type JSON struct{ Value any }
+
+func (j JSON) Scan(value any) error {
+	var buf []byte
+
+	switch v := value.(type) {
+	case []byte:
+		buf = v
+	case string:
+		buf = unsafe.Slice(unsafe.StringData(v), len(v))
+	case int64:
+		buf = strconv.AppendInt(nil, v, 10)
+	case float64:
+		buf = strconv.AppendFloat(nil, v, 'g', -1, 64)
+	case time.Time:
+		buf = append(buf, '"')
+		buf = v.AppendFormat(buf, time.RFC3339Nano)
+		buf = append(buf, '"')
+	case nil:
+		buf = append(buf, "null"...)
+	default:
+		panic(AssertErr())
+	}
+
+	return json.Unmarshal(buf, j.Value)
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/mem.go

@@ -0,0 +1,134 @@
+package util
+
+import (
+	"bytes"
+	"math"
+
+	"github.com/tetratelabs/wazero/api"
+)
+
+func View(mod api.Module, ptr uint32, size uint64) []byte {
+	if ptr == 0 {
+		panic(NilErr)
+	}
+	if size > math.MaxUint32 {
+		panic(RangeErr)
+	}
+	if size == 0 {
+		return nil
+	}
+	buf, ok := mod.Memory().Read(ptr, uint32(size))
+	if !ok {
+		panic(RangeErr)
+	}
+	return buf
+}
+
+func ReadUint8(mod api.Module, ptr uint32) uint8 {
+	if ptr == 0 {
+		panic(NilErr)
+	}
+	v, ok := mod.Memory().ReadByte(ptr)
+	if !ok {
+		panic(RangeErr)
+	}
+	return v
+}
+
+func ReadUint32(mod api.Module, ptr uint32) uint32 {
+	if ptr == 0 {
+		panic(NilErr)
+	}
+	v, ok := mod.Memory().ReadUint32Le(ptr)
+	if !ok {
+		panic(RangeErr)
+	}
+	return v
+}
+
+func WriteUint8(mod api.Module, ptr uint32, v uint8) {
+	if ptr == 0 {
+		panic(NilErr)
+	}
+	ok := mod.Memory().WriteByte(ptr, v)
+	if !ok {
+		panic(RangeErr)
+	}
+}
+
+func WriteUint32(mod api.Module, ptr uint32, v uint32) {
+	if ptr == 0 {
+		panic(NilErr)
+	}
+	ok := mod.Memory().WriteUint32Le(ptr, v)
+	if !ok {
+		panic(RangeErr)
+	}
+}
+
+func ReadUint64(mod api.Module, ptr uint32) uint64 {
+	if ptr == 0 {
+		panic(NilErr)
+	}
+	v, ok := mod.Memory().ReadUint64Le(ptr)
+	if !ok {
+		panic(RangeErr)
+	}
+	return v
+}
+
+func WriteUint64(mod api.Module, ptr uint32, v uint64) {
+	if ptr == 0 {
+		panic(NilErr)
+	}
+	ok := mod.Memory().WriteUint64Le(ptr, v)
+	if !ok {
+		panic(RangeErr)
+	}
+}
+
+func ReadFloat64(mod api.Module, ptr uint32) float64 {
+	return math.Float64frombits(ReadUint64(mod, ptr))
+}
+
+func WriteFloat64(mod api.Module, ptr uint32, v float64) {
+	WriteUint64(mod, ptr, math.Float64bits(v))
+}
+
+func ReadString(mod api.Module, ptr, maxlen uint32) string {
+	if ptr == 0 {
+		panic(NilErr)
+	}
+	switch maxlen {
+	case 0:
+		return ""
+	case math.MaxUint32:
+		// avoid overflow
+	default:
+		maxlen = maxlen + 1
+	}
+	mem := mod.Memory()
+	buf, ok := mem.Read(ptr, maxlen)
+	if !ok {
+		buf, ok = mem.Read(ptr, mem.Size()-ptr)
+		if !ok {
+			panic(RangeErr)
+		}
+	}
+	if i := bytes.IndexByte(buf, 0); i < 0 {
+		panic(NoNulErr)
+	} else {
+		return string(buf[:i])
+	}
+}
+
+func WriteBytes(mod api.Module, ptr uint32, b []byte) {
+	buf := View(mod, ptr, uint64(len(b)))
+	copy(buf, b)
+}
+
+func WriteString(mod api.Module, ptr uint32, s string) {
+	buf := View(mod, ptr, uint64(len(s)+1))
+	buf[len(s)] = 0
+	copy(buf, s)
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/mmap.go

@@ -0,0 +1,97 @@
+//go:build (darwin || linux) && (amd64 || arm64 || riscv64) && !(sqlite3_noshm || sqlite3_nosys)
+
+package util
+
+import (
+	"context"
+	"os"
+	"unsafe"
+
+	"github.com/tetratelabs/wazero/api"
+	"github.com/tetratelabs/wazero/experimental"
+	"golang.org/x/sys/unix"
+)
+
+func withAllocator(ctx context.Context) context.Context {
+	return experimental.WithMemoryAllocator(ctx,
+		experimental.MemoryAllocatorFunc(virtualAlloc))
+}
+
+type mmapState struct {
+	regions []*MappedRegion
+}
+
+func (s *mmapState) new(ctx context.Context, mod api.Module, size int32) *MappedRegion {
+	// Find unused region.
+	for _, r := range s.regions {
+		if !r.used && r.size == size {
+			return r
+		}
+	}
+
+	// Allocate page aligned memmory.
+	alloc := mod.ExportedFunction("aligned_alloc")
+	stack := [2]uint64{
+		uint64(unix.Getpagesize()),
+		uint64(size),
+	}
+	if err := alloc.CallWithStack(ctx, stack[:]); err != nil {
+		panic(err)
+	}
+	if stack[0] == 0 {
+		panic(OOMErr)
+	}
+
+	// Save the newly allocated region.
+	ptr := uint32(stack[0])
+	buf := View(mod, ptr, uint64(size))
+	addr := uintptr(unsafe.Pointer(&buf[0]))
+	s.regions = append(s.regions, &MappedRegion{
+		Ptr:  ptr,
+		addr: addr,
+		size: size,
+	})
+	return s.regions[len(s.regions)-1]
+}
+
+type MappedRegion struct {
+	addr uintptr
+	Ptr  uint32
+	size int32
+	used bool
+}
+
+func MapRegion(ctx context.Context, mod api.Module, f *os.File, offset int64, size int32, prot int) (*MappedRegion, error) {
+	s := ctx.Value(moduleKey{}).(*moduleState)
+	r := s.new(ctx, mod, size)
+	err := r.mmap(f, offset, prot)
+	if err != nil {
+		return nil, err
+	}
+	return r, nil
+}
+
+func (r *MappedRegion) Unmap() error {
+	// We can't munmap the region, otherwise it could be remaped.
+	// Instead, convert it to a protected, private, anonymous mapping.
+	// If successful, it can be reused for a subsequent mmap.
+	_, err := mmap(r.addr, uintptr(r.size),
+		unix.PROT_NONE, unix.MAP_PRIVATE|unix.MAP_ANON|unix.MAP_FIXED,
+		-1, 0)
+	r.used = err != nil
+	return err
+}
+
+func (r *MappedRegion) mmap(f *os.File, offset int64, prot int) error {
+	_, err := mmap(r.addr, uintptr(r.size),
+		prot, unix.MAP_SHARED|unix.MAP_FIXED,
+		int(f.Fd()), offset)
+	r.used = err == nil
+	return err
+}
+
+// We need the low level mmap for MAP_FIXED to work.
+// Bind the syscall version hoping that it is more stable.
+
+//go:linkname mmap syscall.mmap
+func mmap(addr, length uintptr, prot, flag, fd int, pos int64) (*byte, error)

vendor/github.com/ncruces/go-sqlite3/internal/util/mmap_other.go

@@ -0,0 +1,21 @@
+//go:build !(darwin || linux) || !(amd64 || arm64 || riscv64) || sqlite3_noshm || sqlite3_nosys
+
+package util
+
+import (
+	"context"
+
+	"github.com/tetratelabs/wazero/experimental"
+)
+
+type mmapState struct{}
+
+func withAllocator(ctx context.Context) context.Context {
+	return experimental.WithMemoryAllocator(ctx,
+		experimental.MemoryAllocatorFunc(func(cap, max uint64) experimental.LinearMemory {
+			if cap == max {
+				return virtualAlloc(cap, max)
+			}
+			return sliceAlloc(cap, max)
+		}))
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/module.go

@@ -0,0 +1,21 @@
+package util
+
+import (
+	"context"
+
+	"github.com/tetratelabs/wazero/experimental"
+)
+
+type moduleKey struct{}
+type moduleState struct {
+	mmapState
+	handleState
+}
+
+func NewContext(ctx context.Context) context.Context {
+	state := new(moduleState)
+	ctx = withAllocator(ctx)
+	ctx = experimental.WithCloseNotifier(ctx, state)
+	ctx = context.WithValue(ctx, moduleKey{}, state)
+	return ctx
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/pointer.go

@@ -0,0 +1,11 @@
+package util
+
+type Pointer[T any] struct{ Value T }
+
+func (p Pointer[T]) unwrap() any { return p.Value }
+
+type PointerUnwrap interface{ unwrap() any }
+
+func UnwrapPointer(p PointerUnwrap) any {
+	return p.unwrap()
+}

vendor/github.com/ncruces/go-sqlite3/internal/util/reflect.go

@@ -0,0 +1,10 @@
+package util
+
+import "reflect"
+
+func ReflectType(v reflect.Value) reflect.Type {
+	if v.Kind() != reflect.Invalid {
+		return v.Type()
+	}
+	return nil
+}

vendor/github.com/ncruces/go-sqlite3/json.go

@@ -0,0 +1,11 @@
+package sqlite3
+
+import "github.com/ncruces/go-sqlite3/internal/util"
+
+// JSON returns a value that can be used as an argument to
+// [database/sql.DB.Exec], [database/sql.Row.Scan] and similar methods to
+// store value as JSON, or decode JSON into value.
+// JSON should NOT be used with [BindJSON] or [ResultJSON].
+func JSON(value any) any {
+	return util.JSON{Value: value}
+}

vendor/github.com/ncruces/go-sqlite3/pointer.go

@@ -0,0 +1,12 @@
+package sqlite3
+
+import "github.com/ncruces/go-sqlite3/internal/util"
+
+// Pointer returns a pointer to a value that can be used as an argument to
+// [database/sql.DB.Exec] and similar methods.
+// Pointer should NOT be used with [BindPointer] or [ResultPointer].
+//
+// https://sqlite.org/bindptr.html
+func Pointer[T any](value T) any {
+	return util.Pointer[T]{Value: value}
+}

vendor/github.com/ncruces/go-sqlite3/quote.go

@@ -0,0 +1,112 @@
+package sqlite3
+
+import (
+	"bytes"
+	"math"
+	"strconv"
+	"strings"
+	"time"
+	"unsafe"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
+
+// Quote escapes and quotes a value
+// making it safe to embed in SQL text.
+func Quote(value any) string {
+	switch v := value.(type) {
+	case nil:
+		return "NULL"
+	case bool:
+		if v {
+			return "1"
+		} else {
+			return "0"
+		}
+
+	case int:
+		return strconv.Itoa(v)
+	case int64:
+		return strconv.FormatInt(v, 10)
+	case float64:
+		switch {
+		case math.IsNaN(v):
+			return "NULL"
+		case math.IsInf(v, 1):
+			return "9.0e999"
+		case math.IsInf(v, -1):
+			return "-9.0e999"
+		}
+		return strconv.FormatFloat(v, 'g', -1, 64)
+	case time.Time:
+		return "'" + v.Format(time.RFC3339Nano) + "'"
+
+	case string:
+		if strings.IndexByte(v, 0) >= 0 {
+			break
+		}
+
+		buf := make([]byte, 2+len(v)+strings.Count(v, "'"))
+		buf[0] = '\''
+		i := 1
+		for _, b := range []byte(v) {
+			if b == '\'' {
+				buf[i] = b
+				i += 1
+			}
+			buf[i] = b
+			i += 1
+		}
+		buf[i] = '\''
+		return unsafe.String(&buf[0], len(buf))
+
+	case []byte:
+		buf := make([]byte, 3+2*len(v))
+		buf[0] = 'x'
+		buf[1] = '\''
+		i := 2
+		for _, b := range v {
+			const hex = "0123456789ABCDEF"
+			buf[i+0] = hex[b/16]
+			buf[i+1] = hex[b%16]
+			i += 2
+		}
+		buf[i] = '\''
+		return unsafe.String(&buf[0], len(buf))
+
+	case ZeroBlob:
+		if v > ZeroBlob(1e9-3)/2 {
+			break
+		}
+
+		buf := bytes.Repeat([]byte("0"), int(3+2*int64(v)))
+		buf[0] = 'x'
+		buf[1] = '\''
+		buf[len(buf)-1] = '\''
+		return unsafe.String(&buf[0], len(buf))
+	}
+
+	panic(util.ValueErr)
+}
+
+// QuoteIdentifier escapes and quotes an identifier
+// making it safe to embed in SQL text.
+func QuoteIdentifier(id string) string {
+	if strings.IndexByte(id, 0) >= 0 {
+		panic(util.ValueErr)
+	}
+
+	buf := make([]byte, 2+len(id)+strings.Count(id, `"`))
+	buf[0] = '"'
+	i := 1
+	for _, b := range []byte(id) {
+		if b == '"' {
+			buf[i] = b
+			i += 1
+		}
+		buf[i] = b
+		i += 1
+	}
+	buf[i] = '"'
+	return unsafe.String(&buf[0], len(buf))
+}

vendor/github.com/ncruces/go-sqlite3/sqlite.go

@@ -0,0 +1,341 @@
+// Package sqlite3 wraps the C SQLite API.
+package sqlite3
+
+import (
+	"context"
+	"math"
+	"math/bits"
+	"os"
+	"sync"
+	"unsafe"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+	"github.com/ncruces/go-sqlite3/vfs"
+	"github.com/tetratelabs/wazero"
+	"github.com/tetratelabs/wazero/api"
+)
+
+// Configure SQLite Wasm.
+//
+// Importing package embed initializes [Binary]
+// with an appropriate build of SQLite:
+//
+//	import _ "github.com/ncruces/go-sqlite3/embed"
+var (
+	Binary []byte // Wasm binary to load.
+	Path   string // Path to load the binary from.
+
+	RuntimeConfig wazero.RuntimeConfig
+)
+
+// Initialize decodes and compiles the SQLite Wasm binary.
+// This is called implicitly when the first connection is openned,
+// but is potentially slow, so you may want to call it at a more convenient time.
+func Initialize() error {
+	instance.once.Do(compileSQLite)
+	return instance.err
+}
+
+var instance struct {
+	runtime  wazero.Runtime
+	compiled wazero.CompiledModule
+	err      error
+	once     sync.Once
+}
+
+func compileSQLite() {
+	if RuntimeConfig == nil {
+		RuntimeConfig = wazero.NewRuntimeConfig()
+	}
+
+	ctx := context.Background()
+	instance.runtime = wazero.NewRuntimeWithConfig(ctx, RuntimeConfig)
+
+	env := instance.runtime.NewHostModuleBuilder("env")
+	env = vfs.ExportHostFunctions(env)
+	env = exportCallbacks(env)
+	_, instance.err = env.Instantiate(ctx)
+	if instance.err != nil {
+		return
+	}
+
+	bin := Binary
+	if bin == nil && Path != "" {
+		bin, instance.err = os.ReadFile(Path)
+		if instance.err != nil {
+			return
+		}
+	}
+	if bin == nil {
+		instance.err = util.NoBinaryErr
+		return
+	}
+
+	instance.compiled, instance.err = instance.runtime.CompileModule(ctx, bin)
+}
+
+type sqlite struct {
+	ctx   context.Context
+	mod   api.Module
+	funcs struct {
+		fn   [32]api.Function
+		id   [32]*byte
+		mask uint32
+	}
+	stack [8]uint64
+	freer uint32
+}
+
+func instantiateSQLite() (sqlt *sqlite, err error) {
+	if err := Initialize(); err != nil {
+		return nil, err
+	}
+
+	sqlt = new(sqlite)
+	sqlt.ctx = util.NewContext(context.Background())
+
+	sqlt.mod, err = instance.runtime.InstantiateModule(sqlt.ctx,
+		instance.compiled, wazero.NewModuleConfig().WithName(""))
+	if err != nil {
+		return nil, err
+	}
+
+	global := sqlt.mod.ExportedGlobal("malloc_destructor")
+	if global == nil {
+		return nil, util.BadBinaryErr
+	}
+
+	sqlt.freer = util.ReadUint32(sqlt.mod, uint32(global.Get()))
+	if sqlt.freer == 0 {
+		return nil, util.BadBinaryErr
+	}
+	return sqlt, nil
+}
+
+func (sqlt *sqlite) close() error {
+	return sqlt.mod.Close(sqlt.ctx)
+}
+
+func (sqlt *sqlite) error(rc uint64, handle uint32, sql ...string) error {
+	if rc == _OK {
+		return nil
+	}
+
+	err := Error{code: rc}
+
+	if err.Code() == NOMEM || err.ExtendedCode() == IOERR_NOMEM {
+		panic(util.OOMErr)
+	}
+
+	if r := sqlt.call("sqlite3_errstr", rc); r != 0 {
+		err.str = util.ReadString(sqlt.mod, uint32(r), _MAX_NAME)
+	}
+
+	if handle != 0 {
+		if r := sqlt.call("sqlite3_errmsg", uint64(handle)); r != 0 {
+			err.msg = util.ReadString(sqlt.mod, uint32(r), _MAX_LENGTH)
+		}
+
+		if sql != nil {
+			if r := sqlt.call("sqlite3_error_offset", uint64(handle)); r != math.MaxUint32 {
+				err.sql = sql[0][r:]
+			}
+		}
+	}
+
+	switch err.msg {
+	case err.str, "not an error":
+		err.msg = ""
+	}
+	return &err
+}
+
+func (sqlt *sqlite) getfn(name string) api.Function {
+	c := &sqlt.funcs
+	p := unsafe.StringData(name)
+	for i := range c.id {
+		if c.id[i] == p {
+			c.id[i] = nil
+			c.mask &^= uint32(1) << i
+			return c.fn[i]
+		}
+	}
+	return sqlt.mod.ExportedFunction(name)
+}
+
+func (sqlt *sqlite) putfn(name string, fn api.Function) {
+	c := &sqlt.funcs
+	p := unsafe.StringData(name)
+	i := bits.TrailingZeros32(^c.mask)
+	if i < 32 {
+		c.id[i] = p
+		c.fn[i] = fn
+		c.mask |= uint32(1) << i
+	} else {
+		c.id[0] = p
+		c.fn[0] = fn
+		c.mask = uint32(1)
+	}
+}
+
+func (sqlt *sqlite) call(name string, params ...uint64) uint64 {
+	copy(sqlt.stack[:], params)
+	fn := sqlt.getfn(name)
+	err := fn.CallWithStack(sqlt.ctx, sqlt.stack[:])
+	if err != nil {
+		panic(err)
+	}
+	sqlt.putfn(name, fn)
+	return sqlt.stack[0]
+}
+
+func (sqlt *sqlite) free(ptr uint32) {
+	if ptr == 0 {
+		return
+	}
+	sqlt.call("free", uint64(ptr))
+}
+
+func (sqlt *sqlite) new(size uint64) uint32 {
+	if size > _MAX_ALLOCATION_SIZE {
+		panic(util.OOMErr)
+	}
+	ptr := uint32(sqlt.call("malloc", size))
+	if ptr == 0 && size != 0 {
+		panic(util.OOMErr)
+	}
+	return ptr
+}
+
+func (sqlt *sqlite) newBytes(b []byte) uint32 {
+	if (*[0]byte)(b) == nil {
+		return 0
+	}
+	ptr := sqlt.new(uint64(len(b)))
+	util.WriteBytes(sqlt.mod, ptr, b)
+	return ptr
+}
+
+func (sqlt *sqlite) newString(s string) uint32 {
+	ptr := sqlt.new(uint64(len(s) + 1))
+	util.WriteString(sqlt.mod, ptr, s)
+	return ptr
+}
+
+func (sqlt *sqlite) newArena(size uint64) arena {
+	// Ensure the arena's size is a multiple of 8.
+	size = (size + 7) &^ 7
+	return arena{
+		sqlt: sqlt,
+		size: uint32(size),
+		base: sqlt.new(size),
+	}
+}
+
+type arena struct {
+	sqlt *sqlite
+	ptrs []uint32
+	base uint32
+	next uint32
+	size uint32
+}
+
+func (a *arena) free() {
+	if a.sqlt == nil {
+		return
+	}
+	for _, ptr := range a.ptrs {
+		a.sqlt.free(ptr)
+	}
+	a.sqlt.free(a.base)
+	a.sqlt = nil
+}
+
+func (a *arena) mark() (reset func()) {
+	ptrs := len(a.ptrs)
+	next := a.next
+	return func() {
+		for _, ptr := range a.ptrs[ptrs:] {
+			a.sqlt.free(ptr)
+		}
+		a.ptrs = a.ptrs[:ptrs]
+		a.next = next
+	}
+}
+
+func (a *arena) new(size uint64) uint32 {
+	// Align the next address, to 4 or 8 bytes.
+	if size&7 != 0 {
+		a.next = (a.next + 3) &^ 3
+	} else {
+		a.next = (a.next + 7) &^ 7
+	}
+	if size <= uint64(a.size-a.next) {
+		ptr := a.base + a.next
+		a.next += uint32(size)
+		return ptr
+	}
+	ptr := a.sqlt.new(size)
+	a.ptrs = append(a.ptrs, ptr)
+	return ptr
+}
+
+func (a *arena) bytes(b []byte) uint32 {
+	if (*[0]byte)(b) == nil {
+		return 0
+	}
+	ptr := a.new(uint64(len(b)))
+	util.WriteBytes(a.sqlt.mod, ptr, b)
+	return ptr
+}
+
+func (a *arena) string(s string) uint32 {
+	ptr := a.new(uint64(len(s) + 1))
+	util.WriteString(a.sqlt.mod, ptr, s)
+	return ptr
+}
+
+func exportCallbacks(env wazero.HostModuleBuilder) wazero.HostModuleBuilder {
+	util.ExportFuncII(env, "go_progress_handler", progressCallback)
+	util.ExportFuncIIII(env, "go_busy_timeout", timeoutCallback)
+	util.ExportFuncIII(env, "go_busy_handler", busyCallback)
+	util.ExportFuncII(env, "go_commit_hook", commitCallback)
+	util.ExportFuncVI(env, "go_rollback_hook", rollbackCallback)
+	util.ExportFuncVIIIIJ(env, "go_update_hook", updateCallback)
+	util.ExportFuncIIIII(env, "go_wal_hook", walCallback)
+	util.ExportFuncIIIIII(env, "go_autovacuum_pages", autoVacuumCallback)
+	util.ExportFuncIIIIIII(env, "go_authorizer", authorizerCallback)
+	util.ExportFuncVIII(env, "go_log", logCallback)
+	util.ExportFuncVI(env, "go_destroy", destroyCallback)
+	util.ExportFuncVIIII(env, "go_func", funcCallback)
+	util.ExportFuncVIIIII(env, "go_step", stepCallback)
+	util.ExportFuncVIII(env, "go_final", finalCallback)
+	util.ExportFuncVII(env, "go_value", valueCallback)
+	util.ExportFuncVIIII(env, "go_inverse", inverseCallback)
+	util.ExportFuncVIIII(env, "go_collation_needed", collationCallback)
+	util.ExportFuncIIIIII(env, "go_compare", compareCallback)
+	util.ExportFuncIIIIII(env, "go_vtab_create", vtabModuleCallback(xCreate))
+	util.ExportFuncIIIIII(env, "go_vtab_connect", vtabModuleCallback(xConnect))
+	util.ExportFuncII(env, "go_vtab_disconnect", vtabDisconnectCallback)
+	util.ExportFuncII(env, "go_vtab_destroy", vtabDestroyCallback)
+	util.ExportFuncIII(env, "go_vtab_best_index", vtabBestIndexCallback)
+	util.ExportFuncIIIII(env, "go_vtab_update", vtabUpdateCallback)
+	util.ExportFuncIII(env, "go_vtab_rename", vtabRenameCallback)
+	util.ExportFuncIIIII(env, "go_vtab_find_function", vtabFindFuncCallback)
+	util.ExportFuncII(env, "go_vtab_begin", vtabBeginCallback)
+	util.ExportFuncII(env, "go_vtab_sync", vtabSyncCallback)
+	util.ExportFuncII(env, "go_vtab_commit", vtabCommitCallback)
+	util.ExportFuncII(env, "go_vtab_rollback", vtabRollbackCallback)
+	util.ExportFuncIII(env, "go_vtab_savepoint", vtabSavepointCallback)
+	util.ExportFuncIII(env, "go_vtab_release", vtabReleaseCallback)
+	util.ExportFuncIII(env, "go_vtab_rollback_to", vtabRollbackToCallback)
+	util.ExportFuncIIIIII(env, "go_vtab_integrity", vtabIntegrityCallback)
+	util.ExportFuncIII(env, "go_cur_open", cursorOpenCallback)
+	util.ExportFuncII(env, "go_cur_close", cursorCloseCallback)
+	util.ExportFuncIIIIII(env, "go_cur_filter", cursorFilterCallback)
+	util.ExportFuncII(env, "go_cur_next", cursorNextCallback)
+	util.ExportFuncII(env, "go_cur_eof", cursorEOFCallback)
+	util.ExportFuncIIII(env, "go_cur_column", cursorColumnCallback)
+	util.ExportFuncIII(env, "go_cur_rowid", cursorRowIDCallback)
+	return env
+}

vendor/github.com/ncruces/go-sqlite3/stmt.go

@@ -0,0 +1,639 @@
+package sqlite3
+
+import (
+	"encoding/json"
+	"math"
+	"strconv"
+	"time"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
+
+// Stmt is a prepared statement object.
+//
+// https://sqlite.org/c3ref/stmt.html
+type Stmt struct {
+	c      *Conn
+	err    error
+	handle uint32
+}
+
+// Close destroys the prepared statement object.
+//
+// It is safe to close a nil, zero or closed Stmt.
+//
+// https://sqlite.org/c3ref/finalize.html
+func (s *Stmt) Close() error {
+	if s == nil || s.handle == 0 {
+		return nil
+	}
+
+	r := s.c.call("sqlite3_finalize", uint64(s.handle))
+
+	s.handle = 0
+	return s.c.error(r)
+}
+
+// Conn returns the database connection to which the prepared statement belongs.
+//
+// https://sqlite.org/c3ref/db_handle.html
+func (s *Stmt) Conn() *Conn {
+	return s.c
+}
+
+// ReadOnly returns true if and only if the statement
+// makes no direct changes to the content of the database file.
+//
+// https://sqlite.org/c3ref/stmt_readonly.html
+func (s *Stmt) ReadOnly() bool {
+	r := s.c.call("sqlite3_stmt_readonly", uint64(s.handle))
+	return r != 0
+}
+
+// Reset resets the prepared statement object.
+//
+// https://sqlite.org/c3ref/reset.html
+func (s *Stmt) Reset() error {
+	r := s.c.call("sqlite3_reset", uint64(s.handle))
+	s.err = nil
+	return s.c.error(r)
+}
+
+// Busy determines if a prepared statement has been reset.
+//
+// https://sqlite.org/c3ref/stmt_busy.html
+func (s *Stmt) Busy() bool {
+	r := s.c.call("sqlite3_stmt_busy", uint64(s.handle))
+	return r != 0
+}
+
+// Step evaluates the SQL statement.
+// If the SQL statement being executed returns any data,
+// then true is returned each time a new row of data is ready for processing by the caller.
+// The values may be accessed using the Column access functions.
+// Step is called again to retrieve the next row of data.
+// If an error has occurred, Step returns false;
+// call [Stmt.Err] or [Stmt.Reset] to get the error.
+//
+// https://sqlite.org/c3ref/step.html
+func (s *Stmt) Step() bool {
+	s.c.checkInterrupt()
+	r := s.c.call("sqlite3_step", uint64(s.handle))
+	switch r {
+	case _ROW:
+		s.err = nil
+		return true
+	case _DONE:
+		s.err = nil
+	default:
+		s.err = s.c.error(r)
+	}
+	return false
+}
+
+// Err gets the last error occurred during [Stmt.Step].
+// Err returns nil after [Stmt.Reset] is called.
+//
+// https://sqlite.org/c3ref/step.html
+func (s *Stmt) Err() error {
+	return s.err
+}
+
+// Exec is a convenience function that repeatedly calls [Stmt.Step] until it returns false,
+// then calls [Stmt.Reset] to reset the statement and get any error that occurred.
+func (s *Stmt) Exec() error {
+	for s.Step() {
+	}
+	return s.Reset()
+}
+
+// Status monitors the performance characteristics of prepared statements.
+//
+// https://sqlite.org/c3ref/stmt_status.html
+func (s *Stmt) Status(op StmtStatus, reset bool) int {
+	if op > STMTSTATUS_FILTER_HIT && op != STMTSTATUS_MEMUSED {
+		return 0
+	}
+	var i uint64
+	if reset {
+		i = 1
+	}
+	r := s.c.call("sqlite3_stmt_status", uint64(s.handle),
+		uint64(op), i)
+	return int(int32(r))
+}
+
+// ClearBindings resets all bindings on the prepared statement.
+//
+// https://sqlite.org/c3ref/clear_bindings.html
+func (s *Stmt) ClearBindings() error {
+	r := s.c.call("sqlite3_clear_bindings", uint64(s.handle))
+	return s.c.error(r)
+}
+
+// BindCount returns the number of SQL parameters in the prepared statement.
+//
+// https://sqlite.org/c3ref/bind_parameter_count.html
+func (s *Stmt) BindCount() int {
+	r := s.c.call("sqlite3_bind_parameter_count",
+		uint64(s.handle))
+	return int(int32(r))
+}
+
+// BindIndex returns the index of a parameter in the prepared statement
+// given its name.
+//
+// https://sqlite.org/c3ref/bind_parameter_index.html
+func (s *Stmt) BindIndex(name string) int {
+	defer s.c.arena.mark()()
+	namePtr := s.c.arena.string(name)
+	r := s.c.call("sqlite3_bind_parameter_index",
+		uint64(s.handle), uint64(namePtr))
+	return int(int32(r))
+}
+
+// BindName returns the name of a parameter in the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_parameter_name.html
+func (s *Stmt) BindName(param int) string {
+	r := s.c.call("sqlite3_bind_parameter_name",
+		uint64(s.handle), uint64(param))
+
+	ptr := uint32(r)
+	if ptr == 0 {
+		return ""
+	}
+	return util.ReadString(s.c.mod, ptr, _MAX_NAME)
+}
+
+// BindBool binds a bool to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+// SQLite does not have a separate boolean storage class.
+// Instead, boolean values are stored as integers 0 (false) and 1 (true).
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindBool(param int, value bool) error {
+	var i int64
+	if value {
+		i = 1
+	}
+	return s.BindInt64(param, i)
+}
+
+// BindInt binds an int to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindInt(param int, value int) error {
+	return s.BindInt64(param, int64(value))
+}
+
+// BindInt64 binds an int64 to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindInt64(param int, value int64) error {
+	r := s.c.call("sqlite3_bind_int64",
+		uint64(s.handle), uint64(param), uint64(value))
+	return s.c.error(r)
+}
+
+// BindFloat binds a float64 to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindFloat(param int, value float64) error {
+	r := s.c.call("sqlite3_bind_double",
+		uint64(s.handle), uint64(param), math.Float64bits(value))
+	return s.c.error(r)
+}
+
+// BindText binds a string to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindText(param int, value string) error {
+	if len(value) > _MAX_LENGTH {
+		return TOOBIG
+	}
+	ptr := s.c.newString(value)
+	r := s.c.call("sqlite3_bind_text64",
+		uint64(s.handle), uint64(param),
+		uint64(ptr), uint64(len(value)),
+		uint64(s.c.freer), _UTF8)
+	return s.c.error(r)
+}
+
+// BindRawText binds a []byte to the prepared statement as text.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindRawText(param int, value []byte) error {
+	if len(value) > _MAX_LENGTH {
+		return TOOBIG
+	}
+	ptr := s.c.newBytes(value)
+	r := s.c.call("sqlite3_bind_text64",
+		uint64(s.handle), uint64(param),
+		uint64(ptr), uint64(len(value)),
+		uint64(s.c.freer), _UTF8)
+	return s.c.error(r)
+}
+
+// BindBlob binds a []byte to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+// Binding a nil slice is the same as calling [Stmt.BindNull].
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindBlob(param int, value []byte) error {
+	if len(value) > _MAX_LENGTH {
+		return TOOBIG
+	}
+	ptr := s.c.newBytes(value)
+	r := s.c.call("sqlite3_bind_blob64",
+		uint64(s.handle), uint64(param),
+		uint64(ptr), uint64(len(value)),
+		uint64(s.c.freer))
+	return s.c.error(r)
+}
+
+// BindZeroBlob binds a zero-filled, length n BLOB to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindZeroBlob(param int, n int64) error {
+	r := s.c.call("sqlite3_bind_zeroblob64",
+		uint64(s.handle), uint64(param), uint64(n))
+	return s.c.error(r)
+}
+
+// BindNull binds a NULL to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindNull(param int) error {
+	r := s.c.call("sqlite3_bind_null",
+		uint64(s.handle), uint64(param))
+	return s.c.error(r)
+}
+
+// BindTime binds a [time.Time] to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindTime(param int, value time.Time, format TimeFormat) error {
+	if format == TimeFormatDefault {
+		return s.bindRFC3339Nano(param, value)
+	}
+	switch v := format.Encode(value).(type) {
+	case string:
+		s.BindText(param, v)
+	case int64:
+		s.BindInt64(param, v)
+	case float64:
+		s.BindFloat(param, v)
+	default:
+		panic(util.AssertErr())
+	}
+	return nil
+}
+
+func (s *Stmt) bindRFC3339Nano(param int, value time.Time) error {
+	const maxlen = uint64(len(time.RFC3339Nano)) + 5
+
+	ptr := s.c.new(maxlen)
+	buf := util.View(s.c.mod, ptr, maxlen)
+	buf = value.AppendFormat(buf[:0], time.RFC3339Nano)
+
+	r := s.c.call("sqlite3_bind_text64",
+		uint64(s.handle), uint64(param),
+		uint64(ptr), uint64(len(buf)),
+		uint64(s.c.freer), _UTF8)
+	return s.c.error(r)
+}
+
+// BindPointer binds a NULL to the prepared statement, just like [Stmt.BindNull],
+// but it also associates ptr with that NULL value such that it can be retrieved
+// within an application-defined SQL function using [Value.Pointer].
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindPointer(param int, ptr any) error {
+	valPtr := util.AddHandle(s.c.ctx, ptr)
+	r := s.c.call("sqlite3_bind_pointer_go",
+		uint64(s.handle), uint64(param), uint64(valPtr))
+	return s.c.error(r)
+}
+
+// BindJSON binds the JSON encoding of value to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindJSON(param int, value any) error {
+	data, err := json.Marshal(value)
+	if err != nil {
+		return err
+	}
+	return s.BindRawText(param, data)
+}
+
+// BindValue binds a copy of value to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindValue(param int, value Value) error {
+	if value.c != s.c {
+		return MISUSE
+	}
+	r := s.c.call("sqlite3_bind_value",
+		uint64(s.handle), uint64(param), uint64(value.handle))
+	return s.c.error(r)
+}
+
+// ColumnCount returns the number of columns in a result set.
+//
+// https://sqlite.org/c3ref/column_count.html
+func (s *Stmt) ColumnCount() int {
+	r := s.c.call("sqlite3_column_count",
+		uint64(s.handle))
+	return int(int32(r))
+}
+
+// ColumnName returns the name of the result column.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_name.html
+func (s *Stmt) ColumnName(col int) string {
+	r := s.c.call("sqlite3_column_name",
+		uint64(s.handle), uint64(col))
+	if r == 0 {
+		panic(util.OOMErr)
+	}
+	return util.ReadString(s.c.mod, uint32(r), _MAX_NAME)
+}
+
+// ColumnType returns the initial [Datatype] of the result column.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnType(col int) Datatype {
+	r := s.c.call("sqlite3_column_type",
+		uint64(s.handle), uint64(col))
+	return Datatype(r)
+}
+
+// ColumnDeclType returns the declared datatype of the result column.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_decltype.html
+func (s *Stmt) ColumnDeclType(col int) string {
+	r := s.c.call("sqlite3_column_decltype",
+		uint64(s.handle), uint64(col))
+	if r == 0 {
+		return ""
+	}
+	return util.ReadString(s.c.mod, uint32(r), _MAX_NAME)
+}
+
+// ColumnDatabaseName returns the name of the database
+// that is the origin of a particular result column.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_database_name.html
+func (s *Stmt) ColumnDatabaseName(col int) string {
+	r := s.c.call("sqlite3_column_database_name",
+		uint64(s.handle), uint64(col))
+	if r == 0 {
+		return ""
+	}
+	return util.ReadString(s.c.mod, uint32(r), _MAX_NAME)
+}
+
+// ColumnTableName returns the name of the table
+// that is the origin of a particular result column.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_database_name.html
+func (s *Stmt) ColumnTableName(col int) string {
+	r := s.c.call("sqlite3_column_table_name",
+		uint64(s.handle), uint64(col))
+	if r == 0 {
+		return ""
+	}
+	return util.ReadString(s.c.mod, uint32(r), _MAX_NAME)
+}
+
+// ColumnOriginName returns the name of the table column
+// that is the origin of a particular result column.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_database_name.html
+func (s *Stmt) ColumnOriginName(col int) string {
+	r := s.c.call("sqlite3_column_origin_name",
+		uint64(s.handle), uint64(col))
+	if r == 0 {
+		return ""
+	}
+	return util.ReadString(s.c.mod, uint32(r), _MAX_NAME)
+}
+
+// ColumnBool returns the value of the result column as a bool.
+// The leftmost column of the result set has the index 0.
+// SQLite does not have a separate boolean storage class.
+// Instead, boolean values are retrieved as integers,
+// with 0 converted to false and any other value to true.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnBool(col int) bool {
+	return s.ColumnInt64(col) != 0
+}
+
+// ColumnInt returns the value of the result column as an int.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnInt(col int) int {
+	return int(s.ColumnInt64(col))
+}
+
+// ColumnInt64 returns the value of the result column as an int64.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnInt64(col int) int64 {
+	r := s.c.call("sqlite3_column_int64",
+		uint64(s.handle), uint64(col))
+	return int64(r)
+}
+
+// ColumnFloat returns the value of the result column as a float64.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnFloat(col int) float64 {
+	r := s.c.call("sqlite3_column_double",
+		uint64(s.handle), uint64(col))
+	return math.Float64frombits(r)
+}
+
+// ColumnTime returns the value of the result column as a [time.Time].
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnTime(col int, format TimeFormat) time.Time {
+	var v any
+	switch s.ColumnType(col) {
+	case INTEGER:
+		v = s.ColumnInt64(col)
+	case FLOAT:
+		v = s.ColumnFloat(col)
+	case TEXT, BLOB:
+		v = s.ColumnText(col)
+	case NULL:
+		return time.Time{}
+	default:
+		panic(util.AssertErr())
+	}
+	t, err := format.Decode(v)
+	if err != nil {
+		s.err = err
+	}
+	return t
+}
+
+// ColumnText returns the value of the result column as a string.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnText(col int) string {
+	return string(s.ColumnRawText(col))
+}
+
+// ColumnBlob appends to buf and returns
+// the value of the result column as a []byte.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnBlob(col int, buf []byte) []byte {
+	return append(buf, s.ColumnRawBlob(col)...)
+}
+
+// ColumnRawText returns the value of the result column as a []byte.
+// The []byte is owned by SQLite and may be invalidated by
+// subsequent calls to [Stmt] methods.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnRawText(col int) []byte {
+	r := s.c.call("sqlite3_column_text",
+		uint64(s.handle), uint64(col))
+	return s.columnRawBytes(col, uint32(r))
+}
+
+// ColumnRawBlob returns the value of the result column as a []byte.
+// The []byte is owned by SQLite and may be invalidated by
+// subsequent calls to [Stmt] methods.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnRawBlob(col int) []byte {
+	r := s.c.call("sqlite3_column_blob",
+		uint64(s.handle), uint64(col))
+	return s.columnRawBytes(col, uint32(r))
+}
+
+func (s *Stmt) columnRawBytes(col int, ptr uint32) []byte {
+	if ptr == 0 {
+		r := s.c.call("sqlite3_errcode", uint64(s.c.handle))
+		s.err = s.c.error(r)
+		return nil
+	}
+
+	r := s.c.call("sqlite3_column_bytes",
+		uint64(s.handle), uint64(col))
+	return util.View(s.c.mod, ptr, r)
+}
+
+// ColumnJSON parses the JSON-encoded value of the result column
+// and stores it in the value pointed to by ptr.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnJSON(col int, ptr any) error {
+	var data []byte
+	switch s.ColumnType(col) {
+	case NULL:
+		data = append(data, "null"...)
+	case TEXT:
+		data = s.ColumnRawText(col)
+	case BLOB:
+		data = s.ColumnRawBlob(col)
+	case INTEGER:
+		data = strconv.AppendInt(nil, s.ColumnInt64(col), 10)
+	case FLOAT:
+		data = strconv.AppendFloat(nil, s.ColumnFloat(col), 'g', -1, 64)
+	default:
+		panic(util.AssertErr())
+	}
+	return json.Unmarshal(data, ptr)
+}
+
+// ColumnValue returns the unprotected value of the result column.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnValue(col int) Value {
+	r := s.c.call("sqlite3_column_value",
+		uint64(s.handle), uint64(col))
+	return Value{
+		c:      s.c,
+		unprot: true,
+		handle: uint32(r),
+	}
+}
+
+// Columns populates result columns into the provided slice.
+// The slice must have [Stmt.ColumnCount] length.
+//
+// [INTEGER] columns will be retrieved as int64 values,
+// [FLOAT] as float64, [NULL] as nil,
+// [TEXT] as string, and [BLOB] as []byte.
+// Any []byte are owned by SQLite and may be invalidated by
+// subsequent calls to [Stmt] methods.
+func (s *Stmt) Columns(dest []any) error {
+	defer s.c.arena.mark()()
+	count := uint64(len(dest))
+	typePtr := s.c.arena.new(count)
+	dataPtr := s.c.arena.new(8 * count)
+
+	r := s.c.call("sqlite3_columns_go",
+		uint64(s.handle), count, uint64(typePtr), uint64(dataPtr))
+	if err := s.c.error(r); err != nil {
+		return err
+	}
+
+	types := util.View(s.c.mod, typePtr, count)
+	for i := range dest {
+		switch types[i] {
+		case byte(INTEGER):
+			dest[i] = int64(util.ReadUint64(s.c.mod, dataPtr+8*uint32(i)))
+			continue
+		case byte(FLOAT):
+			dest[i] = util.ReadFloat64(s.c.mod, dataPtr+8*uint32(i))
+			continue
+		case byte(NULL):
+			dest[i] = nil
+			continue
+		}
+		ptr := util.ReadUint32(s.c.mod, dataPtr+8*uint32(i)+0)
+		len := util.ReadUint32(s.c.mod, dataPtr+8*uint32(i)+4)
+		buf := util.View(s.c.mod, ptr, uint64(len))
+		if types[i] == byte(TEXT) {
+			dest[i] = string(buf)
+		} else {
+			dest[i] = buf
+		}
+	}
+	return nil
+}

vendor/github.com/ncruces/go-sqlite3/time.go

@@ -0,0 +1,354 @@
+package sqlite3
+
+import (
+	"math"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+	"github.com/ncruces/julianday"
+)
+
+// TimeFormat specifies how to encode/decode time values.
+//
+// See the documentation for the [TimeFormatDefault] constant
+// for formats recognized by SQLite.
+//
+// https://sqlite.org/lang_datefunc.html
+type TimeFormat string
+
+// TimeFormats recognized by SQLite to encode/decode time values.
+//
+// https://sqlite.org/lang_datefunc.html#time_values
+const (
+	TimeFormatDefault TimeFormat = "" // time.RFC3339Nano
+
+	// Text formats
+	TimeFormat1  TimeFormat = "2006-01-02"
+	TimeFormat2  TimeFormat = "2006-01-02 15:04"
+	TimeFormat3  TimeFormat = "2006-01-02 15:04:05"
+	TimeFormat4  TimeFormat = "2006-01-02 15:04:05.000"
+	TimeFormat5  TimeFormat = "2006-01-02T15:04"
+	TimeFormat6  TimeFormat = "2006-01-02T15:04:05"
+	TimeFormat7  TimeFormat = "2006-01-02T15:04:05.000"
+	TimeFormat8  TimeFormat = "15:04"
+	TimeFormat9  TimeFormat = "15:04:05"
+	TimeFormat10 TimeFormat = "15:04:05.000"
+
+	TimeFormat2TZ  = TimeFormat2 + "Z07:00"
+	TimeFormat3TZ  = TimeFormat3 + "Z07:00"
+	TimeFormat4TZ  = TimeFormat4 + "Z07:00"
+	TimeFormat5TZ  = TimeFormat5 + "Z07:00"
+	TimeFormat6TZ  = TimeFormat6 + "Z07:00"
+	TimeFormat7TZ  = TimeFormat7 + "Z07:00"
+	TimeFormat8TZ  = TimeFormat8 + "Z07:00"
+	TimeFormat9TZ  = TimeFormat9 + "Z07:00"
+	TimeFormat10TZ = TimeFormat10 + "Z07:00"
+
+	// Numeric formats
+	TimeFormatJulianDay TimeFormat = "julianday"
+	TimeFormatUnix      TimeFormat = "unixepoch"
+	TimeFormatUnixFrac  TimeFormat = "unixepoch_frac"
+	TimeFormatUnixMilli TimeFormat = "unixepoch_milli" // not an SQLite format
+	TimeFormatUnixMicro TimeFormat = "unixepoch_micro" // not an SQLite format
+	TimeFormatUnixNano  TimeFormat = "unixepoch_nano"  // not an SQLite format
+
+	// Auto
+	TimeFormatAuto TimeFormat = "auto"
+)
+
+// Encode encodes a time value using this format.
+//
+// [TimeFormatDefault] and [TimeFormatAuto] encode using [time.RFC3339Nano],
+// with nanosecond accuracy, and preserving any timezone offset.
+//
+// This is the format used by the [database/sql] driver:
+// [database/sql.Row.Scan] will decode as [time.Time]
+// values encoded with [time.RFC3339Nano].
+//
+// Time values encoded with [time.RFC3339Nano] cannot be sorted as strings
+// to produce a time-ordered sequence.
+//
+// Assuming that the time zones of the time values are the same (e.g., all in UTC),
+// and expressed using the same string (e.g., all "Z" or all "+00:00"),
+// use the TIME [collating sequence] to produce a time-ordered sequence.
+//
+// Otherwise, use [TimeFormat7] for time-ordered encoding.
+//
+// Formats [TimeFormat1] through [TimeFormat10]
+// convert time values to UTC before encoding.
+//
+// Returns a string for the text formats,
+// a float64 for [TimeFormatJulianDay] and [TimeFormatUnixFrac],
+// or an int64 for the other numeric formats.
+//
+// https://sqlite.org/lang_datefunc.html
+//
+// [collating sequence]: https://sqlite.org/datatype3.html#collating_sequences
+func (f TimeFormat) Encode(t time.Time) any {
+	switch f {
+	// Numeric formats
+	case TimeFormatJulianDay:
+		return julianday.Float(t)
+	case TimeFormatUnix:
+		return t.Unix()
+	case TimeFormatUnixFrac:
+		return float64(t.Unix()) + float64(t.Nanosecond())*1e-9
+	case TimeFormatUnixMilli:
+		return t.UnixMilli()
+	case TimeFormatUnixMicro:
+		return t.UnixMicro()
+	case TimeFormatUnixNano:
+		return t.UnixNano()
+	// Special formats.
+	case TimeFormatDefault, TimeFormatAuto:
+		f = time.RFC3339Nano
+	// SQLite assumes UTC if unspecified.
+	case
+		TimeFormat1, TimeFormat2,
+		TimeFormat3, TimeFormat4,
+		TimeFormat5, TimeFormat6,
+		TimeFormat7, TimeFormat8,
+		TimeFormat9, TimeFormat10:
+		t = t.UTC()
+	}
+	return t.Format(string(f))
+}
+
+// Decode decodes a time value using this format.
+//
+// The time value can be a string, an int64, or a float64.
+//
+// Formats [TimeFormat8] through [TimeFormat10]
+// (and [TimeFormat8TZ] through [TimeFormat10TZ])
+// assume a date of 2000-01-01.
+//
+// The timezone indicator and fractional seconds are always optional
+// for formats [TimeFormat2] through [TimeFormat10]
+// (and [TimeFormat2TZ] through [TimeFormat10TZ]).
+//
+// [TimeFormatAuto] implements (and extends) the SQLite auto modifier.
+// Julian day numbers are safe to use for historical dates,
+// from 4712BC through 9999AD.
+// Unix timestamps (expressed in seconds, milliseconds, microseconds, or nanoseconds)
+// are safe to use for current events, from at least 1980 through at least 2260.
+// Unix timestamps before 1980 and after 9999 may be misinterpreted as julian day numbers,
+// or have the wrong time unit.
+//
+// https://sqlite.org/lang_datefunc.html
+func (f TimeFormat) Decode(v any) (time.Time, error) {
+	switch f {
+	// Numeric formats.
+	case TimeFormatJulianDay:
+		switch v := v.(type) {
+		case string:
+			return julianday.Parse(v)
+		case float64:
+			return julianday.FloatTime(v), nil
+		case int64:
+			return julianday.Time(v, 0), nil
+		default:
+			return time.Time{}, util.TimeErr
+		}
+
+	case TimeFormatUnix, TimeFormatUnixFrac:
+		if s, ok := v.(string); ok {
+			f, err := strconv.ParseFloat(s, 64)
+			if err != nil {
+				return time.Time{}, err
+			}
+			v = f
+		}
+		switch v := v.(type) {
+		case float64:
+			sec, frac := math.Modf(v)
+			nsec := math.Floor(frac * 1e9)
+			return time.Unix(int64(sec), int64(nsec)).UTC(), nil
+		case int64:
+			return time.Unix(v, 0).UTC(), nil
+		default:
+			return time.Time{}, util.TimeErr
+		}
+
+	case TimeFormatUnixMilli:
+		if s, ok := v.(string); ok {
+			i, err := strconv.ParseInt(s, 10, 64)
+			if err != nil {
+				return time.Time{}, err
+			}
+			v = i
+		}
+		switch v := v.(type) {
+		case float64:
+			return time.UnixMilli(int64(math.Floor(v))).UTC(), nil
+		case int64:
+			return time.UnixMilli(v).UTC(), nil
+		default:
+			return time.Time{}, util.TimeErr
+		}
+
+	case TimeFormatUnixMicro:
+		if s, ok := v.(string); ok {
+			i, err := strconv.ParseInt(s, 10, 64)
+			if err != nil {
+				return time.Time{}, err
+			}
+			v = i
+		}
+		switch v := v.(type) {
+		case float64:
+			return time.UnixMicro(int64(math.Floor(v))).UTC(), nil
+		case int64:
+			return time.UnixMicro(v).UTC(), nil
+		default:
+			return time.Time{}, util.TimeErr
+		}
+
+	case TimeFormatUnixNano:
+		if s, ok := v.(string); ok {
+			i, err := strconv.ParseInt(s, 10, 64)
+			if err != nil {
+				return time.Time{}, util.TimeErr
+			}
+			v = i
+		}
+		switch v := v.(type) {
+		case float64:
+			return time.Unix(0, int64(math.Floor(v))).UTC(), nil
+		case int64:
+			return time.Unix(0, v).UTC(), nil
+		default:
+			return time.Time{}, util.TimeErr
+		}
+
+	// Special formats.
+	case TimeFormatAuto:
+		switch s := v.(type) {
+		case string:
+			i, err := strconv.ParseInt(s, 10, 64)
+			if err == nil {
+				v = i
+				break
+			}
+			f, err := strconv.ParseFloat(s, 64)
+			if err == nil {
+				v = f
+				break
+			}
+
+			dates := []TimeFormat{
+				TimeFormat9, TimeFormat8,
+				TimeFormat6, TimeFormat5,
+				TimeFormat3, TimeFormat2, TimeFormat1,
+			}
+			for _, f := range dates {
+				t, err := f.Decode(s)
+				if err == nil {
+					return t, nil
+				}
+			}
+		}
+		switch v := v.(type) {
+		case float64:
+			if 0 <= v && v < 5373484.5 {
+				return TimeFormatJulianDay.Decode(v)
+			}
+			if v < 253402300800 {
+				return TimeFormatUnixFrac.Decode(v)
+			}
+			if v < 253402300800_000 {
+				return TimeFormatUnixMilli.Decode(v)
+			}
+			if v < 253402300800_000000 {
+				return TimeFormatUnixMicro.Decode(v)
+			}
+			return TimeFormatUnixNano.Decode(v)
+		case int64:
+			if 0 <= v && v < 5373485 {
+				return TimeFormatJulianDay.Decode(v)
+			}
+			if v < 253402300800 {
+				return TimeFormatUnixFrac.Decode(v)
+			}
+			if v < 253402300800_000 {
+				return TimeFormatUnixMilli.Decode(v)
+			}
+			if v < 253402300800_000000 {
+				return TimeFormatUnixMicro.Decode(v)
+			}
+			return TimeFormatUnixNano.Decode(v)
+		default:
+			return time.Time{}, util.TimeErr
+		}
+
+	case
+		TimeFormat2, TimeFormat2TZ,
+		TimeFormat3, TimeFormat3TZ,
+		TimeFormat4, TimeFormat4TZ,
+		TimeFormat5, TimeFormat5TZ,
+		TimeFormat6, TimeFormat6TZ,
+		TimeFormat7, TimeFormat7TZ:
+		s, ok := v.(string)
+		if !ok {
+			return time.Time{}, util.TimeErr
+		}
+		return f.parseRelaxed(s)
+
+	case
+		TimeFormat8, TimeFormat8TZ,
+		TimeFormat9, TimeFormat9TZ,
+		TimeFormat10, TimeFormat10TZ:
+		s, ok := v.(string)
+		if !ok {
+			return time.Time{}, util.TimeErr
+		}
+		t, err := f.parseRelaxed(s)
+		if err != nil {
+			return time.Time{}, err
+		}
+		return t.AddDate(2000, 0, 0), nil
+
+	default:
+		s, ok := v.(string)
+		if !ok {
+			return time.Time{}, util.TimeErr
+		}
+		if f == "" {
+			f = time.RFC3339Nano
+		}
+		return time.Parse(string(f), s)
+	}
+}
+
+func (f TimeFormat) parseRelaxed(s string) (time.Time, error) {
+	fs := string(f)
+	fs = strings.TrimSuffix(fs, "Z07:00")
+	fs = strings.TrimSuffix(fs, ".000")
+	t, err := time.Parse(fs+"Z07:00", s)
+	if err != nil {
+		return time.Parse(fs, s)
+	}
+	return t, nil
+}
+
+// Scanner returns a [database/sql.Scanner] that can be used as an argument to
+// [database/sql.Row.Scan] and similar methods to
+// decode a time value into dest using this format.
+func (f TimeFormat) Scanner(dest *time.Time) interface{ Scan(any) error } {
+	return timeScanner{dest, f}
+}
+
+type timeScanner struct {
+	*time.Time
+	TimeFormat
+}
+
+func (s timeScanner) Scan(src any) error {
+	var ok bool
+	var err error
+	if *s.Time, ok = src.(time.Time); !ok {
+		*s.Time, err = s.Decode(src)
+	}
+	return err
+}

vendor/github.com/ncruces/go-sqlite3/txn.go

@@ -0,0 +1,294 @@
+package sqlite3
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"math/rand"
+	"runtime"
+	"strconv"
+	"strings"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+	"github.com/tetratelabs/wazero/api"
+)
+
+// Txn is an in-progress database transaction.
+//
+// https://sqlite.org/lang_transaction.html
+type Txn struct {
+	c *Conn
+}
+
+// Begin starts a deferred transaction.
+//
+// https://sqlite.org/lang_transaction.html
+func (c *Conn) Begin() Txn {
+	// BEGIN even if interrupted.
+	err := c.txnExecInterrupted(`BEGIN DEFERRED`)
+	if err != nil {
+		panic(err)
+	}
+	return Txn{c}
+}
+
+// BeginImmediate starts an immediate transaction.
+//
+// https://sqlite.org/lang_transaction.html
+func (c *Conn) BeginImmediate() (Txn, error) {
+	err := c.Exec(`BEGIN IMMEDIATE`)
+	if err != nil {
+		return Txn{}, err
+	}
+	return Txn{c}, nil
+}
+
+// BeginExclusive starts an exclusive transaction.
+//
+// https://sqlite.org/lang_transaction.html
+func (c *Conn) BeginExclusive() (Txn, error) {
+	err := c.Exec(`BEGIN EXCLUSIVE`)
+	if err != nil {
+		return Txn{}, err
+	}
+	return Txn{c}, nil
+}
+
+// End calls either [Txn.Commit] or [Txn.Rollback]
+// depending on whether *error points to a nil or non-nil error.
+//
+// This is meant to be deferred:
+//
+//	func doWork(db *sqlite3.Conn) (err error) {
+//		tx := db.Begin()
+//		defer tx.End(&err)
+//
+//		// ... do work in the transaction
+//	}
+//
+// https://sqlite.org/lang_transaction.html
+func (tx Txn) End(errp *error) {
+	recovered := recover()
+	if recovered != nil {
+		defer panic(recovered)
+	}
+
+	if *errp == nil && recovered == nil {
+		// Success path.
+		if tx.c.GetAutocommit() { // There is nothing to commit.
+			return
+		}
+		*errp = tx.Commit()
+		if *errp == nil {
+			return
+		}
+		// Fall through to the error path.
+	}
+
+	// Error path.
+	if tx.c.GetAutocommit() { // There is nothing to rollback.
+		return
+	}
+	err := tx.Rollback()
+	if err != nil {
+		panic(err)
+	}
+}
+
+// Commit commits the transaction.
+//
+// https://sqlite.org/lang_transaction.html
+func (tx Txn) Commit() error {
+	return tx.c.Exec(`COMMIT`)
+}
+
+// Rollback rolls back the transaction,
+// even if the connection has been interrupted.
+//
+// https://sqlite.org/lang_transaction.html
+func (tx Txn) Rollback() error {
+	return tx.c.txnExecInterrupted(`ROLLBACK`)
+}
+
+// Savepoint is a marker within a transaction
+// that allows for partial rollback.
+//
+// https://sqlite.org/lang_savepoint.html
+type Savepoint struct {
+	c    *Conn
+	name string
+}
+
+// Savepoint establishes a new transaction savepoint.
+//
+// https://sqlite.org/lang_savepoint.html
+func (c *Conn) Savepoint() Savepoint {
+	// Names can be reused; this makes catching bugs more likely.
+	name := saveptName() + "_" + strconv.Itoa(int(rand.Int31()))
+
+	err := c.txnExecInterrupted(fmt.Sprintf("SAVEPOINT %q;", name))
+	if err != nil {
+		panic(err)
+	}
+	return Savepoint{c: c, name: name}
+}
+
+func saveptName() (name string) {
+	defer func() {
+		if name == "" {
+			name = "sqlite3.Savepoint"
+		}
+	}()
+
+	var pc [8]uintptr
+	n := runtime.Callers(3, pc[:])
+	if n <= 0 {
+		return ""
+	}
+	frames := runtime.CallersFrames(pc[:n])
+	frame, more := frames.Next()
+	for more && (strings.HasPrefix(frame.Function, "database/sql.") ||
+		strings.HasPrefix(frame.Function, "github.com/ncruces/go-sqlite3/driver.")) {
+		frame, more = frames.Next()
+	}
+	return frame.Function
+}
+
+// Release releases the savepoint rolling back any changes
+// if *error points to a non-nil error.
+//
+// This is meant to be deferred:
+//
+//	func doWork(db *sqlite3.Conn) (err error) {
+//		savept := db.Savepoint()
+//		defer savept.Release(&err)
+//
+//		// ... do work in the transaction
+//	}
+func (s Savepoint) Release(errp *error) {
+	recovered := recover()
+	if recovered != nil {
+		defer panic(recovered)
+	}
+
+	if *errp == nil && recovered == nil {
+		// Success path.
+		if s.c.GetAutocommit() { // There is nothing to commit.
+			return
+		}
+		*errp = s.c.Exec(fmt.Sprintf("RELEASE %q;", s.name))
+		if *errp == nil {
+			return
+		}
+		// Fall through to the error path.
+	}
+
+	// Error path.
+	if s.c.GetAutocommit() { // There is nothing to rollback.
+		return
+	}
+	// ROLLBACK and RELEASE even if interrupted.
+	err := s.c.txnExecInterrupted(fmt.Sprintf(`
+		ROLLBACK TO %[1]q;
+		RELEASE %[1]q;
+	`, s.name))
+	if err != nil {
+		panic(err)
+	}
+}
+
+// Rollback rolls the transaction back to the savepoint,
+// even if the connection has been interrupted.
+// Rollback does not release the savepoint.
+//
+// https://sqlite.org/lang_transaction.html
+func (s Savepoint) Rollback() error {
+	// ROLLBACK even if interrupted.
+	return s.c.txnExecInterrupted(fmt.Sprintf("ROLLBACK TO %q;", s.name))
+}
+
+func (c *Conn) txnExecInterrupted(sql string) error {
+	err := c.Exec(sql)
+	if errors.Is(err, INTERRUPT) {
+		old := c.SetInterrupt(context.Background())
+		defer c.SetInterrupt(old)
+		err = c.Exec(sql)
+	}
+	return err
+}
+
+// TxnState starts a deferred transaction.
+//
+// https://sqlite.org/c3ref/txn_state.html
+func (c *Conn) TxnState(schema string) TxnState {
+	var ptr uint32
+	if schema != "" {
+		defer c.arena.mark()()
+		ptr = c.arena.string(schema)
+	}
+	r := c.call("sqlite3_txn_state", uint64(c.handle), uint64(ptr))
+	return TxnState(r)
+}
+
+// CommitHook registers a callback function to be invoked
+// whenever a transaction is committed.
+// Return true to allow the commit operation to continue normally.
+//
+// https://sqlite.org/c3ref/commit_hook.html
+func (c *Conn) CommitHook(cb func() (ok bool)) {
+	var enable uint64
+	if cb != nil {
+		enable = 1
+	}
+	c.call("sqlite3_commit_hook_go", uint64(c.handle), enable)
+	c.commit = cb
+}
+
+// RollbackHook registers a callback function to be invoked
+// whenever a transaction is rolled back.
+//
+// https://sqlite.org/c3ref/commit_hook.html
+func (c *Conn) RollbackHook(cb func()) {
+	var enable uint64
+	if cb != nil {
+		enable = 1
+	}
+	c.call("sqlite3_rollback_hook_go", uint64(c.handle), enable)
+	c.rollback = cb
+}
+
+// UpdateHook registers a callback function to be invoked
+// whenever a row is updated, inserted or deleted in a rowid table.
+//
+// https://sqlite.org/c3ref/update_hook.html
+func (c *Conn) UpdateHook(cb func(action AuthorizerActionCode, schema, table string, rowid int64)) {
+	var enable uint64
+	if cb != nil {
+		enable = 1
+	}
+	c.call("sqlite3_update_hook_go", uint64(c.handle), enable)
+	c.update = cb
+}
+
+func commitCallback(ctx context.Context, mod api.Module, pDB uint32) (rollback uint32) {
+	if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.commit != nil {
+		if !c.commit() {
+			rollback = 1
+		}
+	}
+	return rollback
+}
+
+func rollbackCallback(ctx context.Context, mod api.Module, pDB uint32) {
+	if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.rollback != nil {
+		c.rollback()
+	}
+}
+
+func updateCallback(ctx context.Context, mod api.Module, pDB uint32, action AuthorizerActionCode, zSchema, zTabName uint32, rowid uint64) {
+	if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.update != nil {
+		schema := util.ReadString(mod, zSchema, _MAX_NAME)
+		table := util.ReadString(mod, zTabName, _MAX_NAME)
+		c.update(action, schema, table, int64(rowid))
+	}
+}

vendor/github.com/ncruces/go-sqlite3/util/osutil/open.go

@@ -0,0 +1,16 @@
+//go:build !windows
+
+package osutil
+
+import (
+	"io/fs"
+	"os"
+)
+
+// OpenFile behaves the same as [os.OpenFile],
+// except on Windows it sets [syscall.FILE_SHARE_DELETE].
+//
+// See: https://go.dev/issue/32088#issuecomment-502850674
+func OpenFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
+	return os.OpenFile(name, flag, perm)
+}

vendor/github.com/ncruces/go-sqlite3/util/osutil/open_windows.go

@@ -0,0 +1,112 @@
+package osutil
+
+import (
+	"io/fs"
+	"os"
+	. "syscall"
+	"unsafe"
+)
+
+// OpenFile behaves the same as [os.OpenFile],
+// except on Windows it sets [syscall.FILE_SHARE_DELETE].
+//
+// See: https://go.dev/issue/32088#issuecomment-502850674
+func OpenFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
+	if name == "" {
+		return nil, &os.PathError{Op: "open", Path: name, Err: ENOENT}
+	}
+	r, e := syscallOpen(name, flag, uint32(perm.Perm()))
+	if e != nil {
+		return nil, &os.PathError{Op: "open", Path: name, Err: e}
+	}
+	return os.NewFile(uintptr(r), name), nil
+}
+
+// syscallOpen is a copy of [syscall.Open]
+// that uses [syscall.FILE_SHARE_DELETE].
+//
+// https://go.dev/src/syscall/syscall_windows.go
+func syscallOpen(path string, mode int, perm uint32) (fd Handle, err error) {
+	if len(path) == 0 {
+		return InvalidHandle, ERROR_FILE_NOT_FOUND
+	}
+	pathp, err := UTF16PtrFromString(path)
+	if err != nil {
+		return InvalidHandle, err
+	}
+	var access uint32
+	switch mode & (O_RDONLY | O_WRONLY | O_RDWR) {
+	case O_RDONLY:
+		access = GENERIC_READ
+	case O_WRONLY:
+		access = GENERIC_WRITE
+	case O_RDWR:
+		access = GENERIC_READ | GENERIC_WRITE
+	}
+	if mode&O_CREAT != 0 {
+		access |= GENERIC_WRITE
+	}
+	if mode&O_APPEND != 0 {
+		access &^= GENERIC_WRITE
+		access |= FILE_APPEND_DATA
+	}
+	sharemode := uint32(FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE)
+	var sa *SecurityAttributes
+	if mode&O_CLOEXEC == 0 {
+		sa = makeInheritSa()
+	}
+	var createmode uint32
+	switch {
+	case mode&(O_CREAT|O_EXCL) == (O_CREAT | O_EXCL):
+		createmode = CREATE_NEW
+	case mode&(O_CREAT|O_TRUNC) == (O_CREAT | O_TRUNC):
+		createmode = CREATE_ALWAYS
+	case mode&O_CREAT == O_CREAT:
+		createmode = OPEN_ALWAYS
+	case mode&O_TRUNC == O_TRUNC:
+		createmode = TRUNCATE_EXISTING
+	default:
+		createmode = OPEN_EXISTING
+	}
+	var attrs uint32 = FILE_ATTRIBUTE_NORMAL
+	if perm&S_IWRITE == 0 {
+		attrs = FILE_ATTRIBUTE_READONLY
+		if createmode == CREATE_ALWAYS {
+			const _ERROR_BAD_NETPATH = Errno(53)
+			// We have been asked to create a read-only file.
+			// If the file already exists, the semantics of
+			// the Unix open system call is to preserve the
+			// existing permissions. If we pass CREATE_ALWAYS
+			// and FILE_ATTRIBUTE_READONLY to CreateFile,
+			// and the file already exists, CreateFile will
+			// change the file permissions.
+			// Avoid that to preserve the Unix semantics.
+			h, e := CreateFile(pathp, access, sharemode, sa, TRUNCATE_EXISTING, FILE_ATTRIBUTE_NORMAL, 0)
+			switch e {
+			case ERROR_FILE_NOT_FOUND, _ERROR_BAD_NETPATH, ERROR_PATH_NOT_FOUND:
+				// File does not exist. These are the same
+				// errors as Errno.Is checks for ErrNotExist.
+				// Carry on to create the file.
+			default:
+				// Success or some different error.
+				return h, e
+			}
+		}
+	}
+	if createmode == OPEN_EXISTING && access == GENERIC_READ {
+		// Necessary for opening directory handles.
+		attrs |= FILE_FLAG_BACKUP_SEMANTICS
+	}
+	if mode&O_SYNC != 0 {
+		const _FILE_FLAG_WRITE_THROUGH = 0x80000000
+		attrs |= _FILE_FLAG_WRITE_THROUGH
+	}
+	return CreateFile(pathp, access, sharemode, sa, createmode, attrs, 0)
+}
+
+func makeInheritSa() *SecurityAttributes {
+	var sa SecurityAttributes
+	sa.Length = uint32(unsafe.Sizeof(sa))
+	sa.InheritHandle = 1
+	return &sa
+}

vendor/github.com/ncruces/go-sqlite3/util/osutil/osfs.go

@@ -0,0 +1,33 @@
+package osutil
+
+import (
+	"io/fs"
+	"os"
+)
+
+// FS implements [fs.FS], [fs.StatFS], and [fs.ReadFileFS]
+// using package [os].
+//
+// This filesystem does not respect [fs.ValidPath] rules,
+// and fails [testing/fstest.TestFS]!
+//
+// Still, it can be a useful tool to unify implementations
+// that can access either the [os] filesystem or an [fs.FS].
+// It's OK to use this to open files, but you should avoid
+// opening directories, resolving paths, or walking the file system.
+type FS struct{}
+
+// Open implements [fs.FS].
+func (FS) Open(name string) (fs.File, error) {
+	return OpenFile(name, os.O_RDONLY, 0)
+}
+
+// ReadFileFS implements [fs.StatFS].
+func (FS) Stat(name string) (fs.FileInfo, error) {
+	return os.Stat(name)
+}
+
+// ReadFile implements [fs.ReadFileFS].
+func (FS) ReadFile(name string) ([]byte, error) {
+	return os.ReadFile(name)
+}

vendor/github.com/ncruces/go-sqlite3/util/osutil/osutil.go

@@ -0,0 +1,2 @@
+// Package osutil implements operating system utility functions.
+package osutil

vendor/github.com/ncruces/go-sqlite3/value.go

@@ -0,0 +1,236 @@
+package sqlite3
+
+import (
+	"encoding/json"
+	"math"
+	"strconv"
+	"time"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
+
+// Value is any value that can be stored in a database table.
+//
+// https://sqlite.org/c3ref/value.html
+type Value struct {
+	c      *Conn
+	handle uint32
+	unprot bool
+	copied bool
+}
+
+func (v Value) protected() uint64 {
+	if v.unprot {
+		panic(util.ValueErr)
+	}
+	return uint64(v.handle)
+}
+
+// Dup makes a copy of the SQL value and returns a pointer to that copy.
+//
+// https://sqlite.org/c3ref/value_dup.html
+func (v Value) Dup() *Value {
+	r := v.c.call("sqlite3_value_dup", uint64(v.handle))
+	return &Value{
+		c:      v.c,
+		copied: true,
+		handle: uint32(r),
+	}
+}
+
+// Close frees an SQL value previously obtained by [Value.Dup].
+//
+// https://sqlite.org/c3ref/value_dup.html
+func (dup *Value) Close() error {
+	if !dup.copied {
+		panic(util.ValueErr)
+	}
+	dup.c.call("sqlite3_value_free", uint64(dup.handle))
+	dup.handle = 0
+	return nil
+}
+
+// Type returns the initial datatype of the value.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) Type() Datatype {
+	r := v.c.call("sqlite3_value_type", v.protected())
+	return Datatype(r)
+}
+
+// Type returns the numeric datatype of the value.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) NumericType() Datatype {
+	r := v.c.call("sqlite3_value_numeric_type", v.protected())
+	return Datatype(r)
+}
+
+// Bool returns the value as a bool.
+// SQLite does not have a separate boolean storage class.
+// Instead, boolean values are retrieved as integers,
+// with 0 converted to false and any other value to true.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) Bool() bool {
+	return v.Int64() != 0
+}
+
+// Int returns the value as an int.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) Int() int {
+	return int(v.Int64())
+}
+
+// Int64 returns the value as an int64.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) Int64() int64 {
+	r := v.c.call("sqlite3_value_int64", v.protected())
+	return int64(r)
+}
+
+// Float returns the value as a float64.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) Float() float64 {
+	r := v.c.call("sqlite3_value_double", v.protected())
+	return math.Float64frombits(r)
+}
+
+// Time returns the value as a [time.Time].
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) Time(format TimeFormat) time.Time {
+	var a any
+	switch v.Type() {
+	case INTEGER:
+		a = v.Int64()
+	case FLOAT:
+		a = v.Float()
+	case TEXT, BLOB:
+		a = v.Text()
+	case NULL:
+		return time.Time{}
+	default:
+		panic(util.AssertErr())
+	}
+	t, _ := format.Decode(a)
+	return t
+}
+
+// Text returns the value as a string.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) Text() string {
+	return string(v.RawText())
+}
+
+// Blob appends to buf and returns
+// the value as a []byte.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) Blob(buf []byte) []byte {
+	return append(buf, v.RawBlob()...)
+}
+
+// RawText returns the value as a []byte.
+// The []byte is owned by SQLite and may be invalidated by
+// subsequent calls to [Value] methods.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) RawText() []byte {
+	r := v.c.call("sqlite3_value_text", v.protected())
+	return v.rawBytes(uint32(r))
+}
+
+// RawBlob returns the value as a []byte.
+// The []byte is owned by SQLite and may be invalidated by
+// subsequent calls to [Value] methods.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) RawBlob() []byte {
+	r := v.c.call("sqlite3_value_blob", v.protected())
+	return v.rawBytes(uint32(r))
+}
+
+func (v Value) rawBytes(ptr uint32) []byte {
+	if ptr == 0 {
+		return nil
+	}
+
+	r := v.c.call("sqlite3_value_bytes", v.protected())
+	return util.View(v.c.mod, ptr, r)
+}
+
+// Pointer gets the pointer associated with this value,
+// or nil if it has no associated pointer.
+func (v Value) Pointer() any {
+	r := v.c.call("sqlite3_value_pointer_go", v.protected())
+	return util.GetHandle(v.c.ctx, uint32(r))
+}
+
+// JSON parses a JSON-encoded value
+// and stores the result in the value pointed to by ptr.
+func (v Value) JSON(ptr any) error {
+	var data []byte
+	switch v.Type() {
+	case NULL:
+		data = append(data, "null"...)
+	case TEXT:
+		data = v.RawText()
+	case BLOB:
+		data = v.RawBlob()
+	case INTEGER:
+		data = strconv.AppendInt(nil, v.Int64(), 10)
+	case FLOAT:
+		data = strconv.AppendFloat(nil, v.Float(), 'g', -1, 64)
+	default:
+		panic(util.AssertErr())
+	}
+	return json.Unmarshal(data, ptr)
+}
+
+// NoChange returns true if and only if the value is unchanged
+// in a virtual table update operatiom.
+//
+// https://sqlite.org/c3ref/value_blob.html
+func (v Value) NoChange() bool {
+	r := v.c.call("sqlite3_value_nochange", v.protected())
+	return r != 0
+}
+
+// InFirst returns the first element
+// on the right-hand side of an IN constraint.
+//
+// https://sqlite.org/c3ref/vtab_in_first.html
+func (v Value) InFirst() (Value, error) {
+	defer v.c.arena.mark()()
+	valPtr := v.c.arena.new(ptrlen)
+	r := v.c.call("sqlite3_vtab_in_first", uint64(v.handle), uint64(valPtr))
+	if err := v.c.error(r); err != nil {
+		return Value{}, err
+	}
+	return Value{
+		c:      v.c,
+		handle: util.ReadUint32(v.c.mod, valPtr),
+	}, nil
+}
+
+// InNext returns the next element
+// on the right-hand side of an IN constraint.
+//
+// https://sqlite.org/c3ref/vtab_in_first.html
+func (v Value) InNext() (Value, error) {
+	defer v.c.arena.mark()()
+	valPtr := v.c.arena.new(ptrlen)
+	r := v.c.call("sqlite3_vtab_in_next", uint64(v.handle), uint64(valPtr))
+	if err := v.c.error(r); err != nil {
+		return Value{}, err
+	}
+	return Value{
+		c:      v.c,
+		handle: util.ReadUint32(v.c.mod, valPtr),
+	}, nil
+}

vendor/github.com/ncruces/go-sqlite3/vfs/README.md

@@ -0,0 +1,86 @@
+# Go SQLite VFS API
+
+This package implements the SQLite [OS Interface](https://sqlite.org/vfs.html) (aka VFS).
+
+It replaces the default SQLite VFS with a **pure Go** implementation,
+and exposes [interfaces](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs#VFS)
+that should allow you to implement your own custom VFSes.
+
+Since it is a from scratch reimplementation,
+there are naturally some ways it deviates from the original.
+
+The main differences are [file locking](#file-locking) and [WAL mode](#write-ahead-logging) support.
+
+### File Locking
+
+POSIX advisory locks, which SQLite uses on Unix, are
+[broken by design](https://github.com/sqlite/sqlite/blob/b74eb0/src/os_unix.c#L1073-L1161).
+
+On Linux and macOS, this module uses
+[OFD locks](https://www.gnu.org/software/libc/manual/html_node/Open-File-Description-Locks.html)
+to synchronize access to database files.
+OFD locks are fully compatible with POSIX advisory locks.
+
+This module can also use
+[BSD locks](https://man.freebsd.org/cgi/man.cgi?query=flock&sektion=2),
+albeit with reduced concurrency (`BEGIN IMMEDIATE` behaves like `BEGIN EXCLUSIVE`).
+On BSD, macOS, and illumos, BSD locks are fully compatible with POSIX advisory locks;
+on Linux and z/OS, they are fully functional, but incompatible;
+elsewhere, they are very likely broken.
+BSD locks are the default on BSD and illumos,
+but you can opt into them with the `sqlite3_flock` build tag.
+
+On Windows, this module uses `LockFileEx` and `UnlockFileEx`,
+like SQLite.
+
+Otherwise, file locking is not supported, and you must use
+[`nolock=1`](https://sqlite.org/uri.html#urinolock)
+(or [`immutable=1`](https://sqlite.org/uri.html#uriimmutable))
+to open database files.
+To use the [`database/sql`](https://pkg.go.dev/database/sql) driver
+with `nolock=1` you must disable connection pooling by calling
+[`db.SetMaxOpenConns(1)`](https://pkg.go.dev/database/sql#DB.SetMaxOpenConns).
+
+You can use [`vfs.SupportsFileLocking`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs#SupportsFileLocking)
+to check if your build supports file locking.
+
+### Write-Ahead Logging
+
+On 64-bit Linux and macOS, this module uses `mmap` to implement
+[shared-memory for the WAL-index](https://sqlite.org/wal.html#implementation_of_shared_memory_for_the_wal_index),
+like SQLite.
+
+To allow `mmap` to work, each connection needs to reserve up to 4GB of address space.
+To limit the address space each connection reserves,
+use [`WithMemoryLimitPages`](../tests/testcfg/testcfg.go).
+
+Otherwise, [WAL support is limited](https://sqlite.org/wal.html#noshm),
+and `EXCLUSIVE` locking mode must be set to create, read, and write WAL databases.
+To use `EXCLUSIVE` locking mode with the
+[`database/sql`](https://pkg.go.dev/database/sql) driver
+you must disable connection pooling by calling
+[`db.SetMaxOpenConns(1)`](https://pkg.go.dev/database/sql#DB.SetMaxOpenConns).
+
+You can use [`vfs.SupportsSharedMemory`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs#SupportsSharedMemory)
+to check if your build supports shared memory.
+
+### Batch-Atomic Write
+
+On 64-bit Linux, this module supports [batch-atomic writes](https://sqlite.org/cgi/src/technote/714)
+on the F2FS filesystem.
+
+### Build Tags
+
+The VFS can be customized with a few build tags:
+- `sqlite3_flock` forces the use of BSD locks; it can be used on z/OS to enable locking,
+  and elsewhere to test BSD locks.
+- `sqlite3_nosys` prevents importing [`x/sys`](https://pkg.go.dev/golang.org/x/sys);
+  disables locking _and_ shared memory on all platforms.
+- `sqlite3_noshm` disables shared memory on all platforms.
+
+> [!IMPORTANT]
+> The default configuration of this package is compatible with
+> the standard [Unix and Windows SQLite VFSes](https://sqlite.org/vfs.html#multiple_vfses);
+> `sqlite3_flock` is compatible with the [`unix-flock` VFS](https://sqlite.org/compile.html#enable_locking_style).
+> If incompatible file locking is used, accessing databases concurrently with _other_ SQLite libraries
+> will eventually corrupt data.

vendor/github.com/ncruces/go-sqlite3/vfs/api.go

@@ -0,0 +1,175 @@
+// Package vfs wraps the C SQLite VFS API.
+package vfs
+
+import (
+	"context"
+	"io"
+
+	"github.com/tetratelabs/wazero/api"
+)
+
+// A VFS defines the interface between the SQLite core and the underlying operating system.
+//
+// Use sqlite3.ErrorCode or sqlite3.ExtendedErrorCode to return specific error codes to SQLite.
+//
+// https://sqlite.org/c3ref/vfs.html
+type VFS interface {
+	Open(name string, flags OpenFlag) (File, OpenFlag, error)
+	Delete(name string, syncDir bool) error
+	Access(name string, flags AccessFlag) (bool, error)
+	FullPathname(name string) (string, error)
+}
+
+// VFSFilename extends VFS with the ability to use Filename
+// objects for opening files.
+//
+// https://sqlite.org/c3ref/filename.html
+type VFSFilename interface {
+	VFS
+	OpenFilename(name *Filename, flags OpenFlag) (File, OpenFlag, error)
+}
+
+// A File represents an open file in the OS interface layer.
+//
+// Use sqlite3.ErrorCode or sqlite3.ExtendedErrorCode to return specific error codes to SQLite.
+// In particular, sqlite3.BUSY is necessary to correctly implement lock methods.
+//
+// https://sqlite.org/c3ref/io_methods.html
+type File interface {
+	Close() error
+	ReadAt(p []byte, off int64) (n int, err error)
+	WriteAt(p []byte, off int64) (n int, err error)
+	Truncate(size int64) error
+	Sync(flags SyncFlag) error
+	Size() (int64, error)
+	Lock(lock LockLevel) error
+	Unlock(lock LockLevel) error
+	CheckReservedLock() (bool, error)
+	SectorSize() int
+	DeviceCharacteristics() DeviceCharacteristic
+}
+
+// FileLockState extends File to implement the
+// SQLITE_FCNTL_LOCKSTATE file control opcode.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntllockstate
+type FileLockState interface {
+	File
+	LockState() LockLevel
+}
+
+// FileChunkSize extends File to implement the
+// SQLITE_FCNTL_CHUNK_SIZE file control opcode.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlchunksize
+type FileChunkSize interface {
+	File
+	ChunkSize(size int)
+}
+
+// FileSizeHint extends File to implement the
+// SQLITE_FCNTL_SIZE_HINT file control opcode.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlsizehint
+type FileSizeHint interface {
+	File
+	SizeHint(size int64) error
+}
+
+// FileHasMoved extends File to implement the
+// SQLITE_FCNTL_HAS_MOVED file control opcode.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlhasmoved
+type FileHasMoved interface {
+	File
+	HasMoved() (bool, error)
+}
+
+// FileOverwrite extends File to implement the
+// SQLITE_FCNTL_OVERWRITE file control opcode.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntloverwrite
+type FileOverwrite interface {
+	File
+	Overwrite() error
+}
+
+// FilePersistentWAL extends File to implement the
+// SQLITE_FCNTL_PERSIST_WAL file control opcode.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlpersistwal
+type FilePersistentWAL interface {
+	File
+	PersistentWAL() bool
+	SetPersistentWAL(bool)
+}
+
+// FilePowersafeOverwrite extends File to implement the
+// SQLITE_FCNTL_POWERSAFE_OVERWRITE file control opcode.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlpowersafeoverwrite
+type FilePowersafeOverwrite interface {
+	File
+	PowersafeOverwrite() bool
+	SetPowersafeOverwrite(bool)
+}
+
+// FileCommitPhaseTwo extends File to implement the
+// SQLITE_FCNTL_COMMIT_PHASETWO file control opcode.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlcommitphasetwo
+type FileCommitPhaseTwo interface {
+	File
+	CommitPhaseTwo() error
+}
+
+// FileBatchAtomicWrite extends File to implement the
+// SQLITE_FCNTL_BEGIN_ATOMIC_WRITE, SQLITE_FCNTL_COMMIT_ATOMIC_WRITE
+// and SQLITE_FCNTL_ROLLBACK_ATOMIC_WRITE file control opcodes.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlbeginatomicwrite
+type FileBatchAtomicWrite interface {
+	File
+	BeginAtomicWrite() error
+	CommitAtomicWrite() error
+	RollbackAtomicWrite() error
+}
+
+// FilePragma extends File to implement the
+// SQLITE_FCNTL_PRAGMA file control opcode.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlpragma
+type FilePragma interface {
+	File
+	Pragma(name, value string) (string, error)
+}
+
+// FileCheckpoint extends File to implement the
+// SQLITE_FCNTL_CKPT_START and SQLITE_FCNTL_CKPT_DONE
+// file control opcodes.
+//
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlckptstart
+type FileCheckpoint interface {
+	File
+	CheckpointDone() error
+	CheckpointStart() error
+}
+
+// FileSharedMemory extends File to possibly implement
+// shared-memory for the WAL-index.
+// The same shared-memory instance must be returned
+// for the entire life of the file.
+// It's OK for SharedMemory to return nil.
+type FileSharedMemory interface {
+	File
+	SharedMemory() SharedMemory
+}
+
+// SharedMemory is a shared-memory WAL-index implementation.
+// Use [NewSharedMemory] to create a shared-memory.
+type SharedMemory interface {
+	shmMap(context.Context, api.Module, int32, int32, bool) (uint32, error)
+	shmLock(int32, int32, _ShmFlag) error
+	shmUnmap(bool)
+	io.Closer
+}

vendor/github.com/ncruces/go-sqlite3/vfs/const.go

@@ -0,0 +1,234 @@
+package vfs
+
+import "github.com/ncruces/go-sqlite3/internal/util"
+
+const (
+	_MAX_NAME            = 1e6 // Self-imposed limit for most NUL terminated strings.
+	_MAX_SQL_LENGTH      = 1e9
+	_MAX_PATHNAME        = 1024
+	_DEFAULT_SECTOR_SIZE = 4096
+
+	ptrlen = 4
+)
+
+// https://sqlite.org/rescode.html
+type _ErrorCode uint32
+
+func (e _ErrorCode) Error() string {
+	return util.ErrorCodeString(uint32(e))
+}
+
+const (
+	_OK                      _ErrorCode = util.OK
+	_ERROR                   _ErrorCode = util.ERROR
+	_PERM                    _ErrorCode = util.PERM
+	_BUSY                    _ErrorCode = util.BUSY
+	_READONLY                _ErrorCode = util.READONLY
+	_IOERR                   _ErrorCode = util.IOERR
+	_NOTFOUND                _ErrorCode = util.NOTFOUND
+	_CANTOPEN                _ErrorCode = util.CANTOPEN
+	_IOERR_READ              _ErrorCode = util.IOERR_READ
+	_IOERR_SHORT_READ        _ErrorCode = util.IOERR_SHORT_READ
+	_IOERR_WRITE             _ErrorCode = util.IOERR_WRITE
+	_IOERR_FSYNC             _ErrorCode = util.IOERR_FSYNC
+	_IOERR_DIR_FSYNC         _ErrorCode = util.IOERR_DIR_FSYNC
+	_IOERR_TRUNCATE          _ErrorCode = util.IOERR_TRUNCATE
+	_IOERR_FSTAT             _ErrorCode = util.IOERR_FSTAT
+	_IOERR_UNLOCK            _ErrorCode = util.IOERR_UNLOCK
+	_IOERR_RDLOCK            _ErrorCode = util.IOERR_RDLOCK
+	_IOERR_DELETE            _ErrorCode = util.IOERR_DELETE
+	_IOERR_ACCESS            _ErrorCode = util.IOERR_ACCESS
+	_IOERR_CHECKRESERVEDLOCK _ErrorCode = util.IOERR_CHECKRESERVEDLOCK
+	_IOERR_LOCK              _ErrorCode = util.IOERR_LOCK
+	_IOERR_CLOSE             _ErrorCode = util.IOERR_CLOSE
+	_IOERR_SHMOPEN           _ErrorCode = util.IOERR_SHMOPEN
+	_IOERR_SHMSIZE           _ErrorCode = util.IOERR_SHMSIZE
+	_IOERR_SHMLOCK           _ErrorCode = util.IOERR_SHMLOCK
+	_IOERR_SHMMAP            _ErrorCode = util.IOERR_SHMMAP
+	_IOERR_SEEK              _ErrorCode = util.IOERR_SEEK
+	_IOERR_DELETE_NOENT      _ErrorCode = util.IOERR_DELETE_NOENT
+	_IOERR_BEGIN_ATOMIC      _ErrorCode = util.IOERR_BEGIN_ATOMIC
+	_IOERR_COMMIT_ATOMIC     _ErrorCode = util.IOERR_COMMIT_ATOMIC
+	_IOERR_ROLLBACK_ATOMIC   _ErrorCode = util.IOERR_ROLLBACK_ATOMIC
+	_CANTOPEN_FULLPATH       _ErrorCode = util.CANTOPEN_FULLPATH
+	_CANTOPEN_ISDIR          _ErrorCode = util.CANTOPEN_ISDIR
+	_READONLY_CANTINIT       _ErrorCode = util.READONLY_CANTINIT
+	_OK_SYMLINK              _ErrorCode = util.OK_SYMLINK
+)
+
+// OpenFlag is a flag for the [VFS] Open method.
+//
+// https://sqlite.org/c3ref/c_open_autoproxy.html
+type OpenFlag uint32
+
+const (
+	OPEN_READONLY      OpenFlag = 0x00000001 /* Ok for sqlite3_open_v2() */
+	OPEN_READWRITE     OpenFlag = 0x00000002 /* Ok for sqlite3_open_v2() */
+	OPEN_CREATE        OpenFlag = 0x00000004 /* Ok for sqlite3_open_v2() */
+	OPEN_DELETEONCLOSE OpenFlag = 0x00000008 /* VFS only */
+	OPEN_EXCLUSIVE     OpenFlag = 0x00000010 /* VFS only */
+	OPEN_AUTOPROXY     OpenFlag = 0x00000020 /* VFS only */
+	OPEN_URI           OpenFlag = 0x00000040 /* Ok for sqlite3_open_v2() */
+	OPEN_MEMORY        OpenFlag = 0x00000080 /* Ok for sqlite3_open_v2() */
+	OPEN_MAIN_DB       OpenFlag = 0x00000100 /* VFS only */
+	OPEN_TEMP_DB       OpenFlag = 0x00000200 /* VFS only */
+	OPEN_TRANSIENT_DB  OpenFlag = 0x00000400 /* VFS only */
+	OPEN_MAIN_JOURNAL  OpenFlag = 0x00000800 /* VFS only */
+	OPEN_TEMP_JOURNAL  OpenFlag = 0x00001000 /* VFS only */
+	OPEN_SUBJOURNAL    OpenFlag = 0x00002000 /* VFS only */
+	OPEN_SUPER_JOURNAL OpenFlag = 0x00004000 /* VFS only */
+	OPEN_NOMUTEX       OpenFlag = 0x00008000 /* Ok for sqlite3_open_v2() */
+	OPEN_FULLMUTEX     OpenFlag = 0x00010000 /* Ok for sqlite3_open_v2() */
+	OPEN_SHAREDCACHE   OpenFlag = 0x00020000 /* Ok for sqlite3_open_v2() */
+	OPEN_PRIVATECACHE  OpenFlag = 0x00040000 /* Ok for sqlite3_open_v2() */
+	OPEN_WAL           OpenFlag = 0x00080000 /* VFS only */
+	OPEN_NOFOLLOW      OpenFlag = 0x01000000 /* Ok for sqlite3_open_v2() */
+)
+
+// AccessFlag is a flag for the [VFS] Access method.
+//
+// https://sqlite.org/c3ref/c_access_exists.html
+type AccessFlag uint32
+
+const (
+	ACCESS_EXISTS    AccessFlag = 0
+	ACCESS_READWRITE AccessFlag = 1 /* Used by PRAGMA temp_store_directory */
+	ACCESS_READ      AccessFlag = 2 /* Unused */
+)
+
+// SyncFlag is a flag for the [File] Sync method.
+//
+// https://sqlite.org/c3ref/c_sync_dataonly.html
+type SyncFlag uint32
+
+const (
+	SYNC_NORMAL   SyncFlag = 0x00002
+	SYNC_FULL     SyncFlag = 0x00003
+	SYNC_DATAONLY SyncFlag = 0x00010
+)
+
+// LockLevel is a value used with [File] Lock and Unlock methods.
+//
+// https://sqlite.org/c3ref/c_lock_exclusive.html
+type LockLevel uint32
+
+const (
+	// No locks are held on the database.
+	// The database may be neither read nor written.
+	// Any internally cached data is considered suspect and subject to
+	// verification against the database file before being used.
+	// Other processes can read or write the database as their own locking
+	// states permit.
+	// This is the default state.
+	LOCK_NONE LockLevel = 0 /* xUnlock() only */
+
+	// The database may be read but not written.
+	// Any number of processes can hold SHARED locks at the same time,
+	// hence there can be many simultaneous readers.
+	// But no other thread or process is allowed to write to the database file
+	// while one or more SHARED locks are active.
+	LOCK_SHARED LockLevel = 1 /* xLock() or xUnlock() */
+
+	// A RESERVED lock means that the process is planning on writing to the
+	// database file at some point in the future but that it is currently just
+	// reading from the file.
+	// Only a single RESERVED lock may be active at one time,
+	// though multiple SHARED locks can coexist with a single RESERVED lock.
+	// RESERVED differs from PENDING in that new SHARED locks can be acquired
+	// while there is a RESERVED lock.
+	LOCK_RESERVED LockLevel = 2 /* xLock() only */
+
+	// A PENDING lock means that the process holding the lock wants to write to
+	// the database as soon as possible and is just waiting on all current
+	// SHARED locks to clear so that it can get an EXCLUSIVE lock.
+	// No new SHARED locks are permitted against the database if a PENDING lock
+	// is active, though existing SHARED locks are allowed to continue.
+	LOCK_PENDING LockLevel = 3 /* internal use only */
+
+	// An EXCLUSIVE lock is needed in order to write to the database file.
+	// Only one EXCLUSIVE lock is allowed on the file and no other locks of any
+	// kind are allowed to coexist with an EXCLUSIVE lock.
+	// In order to maximize concurrency, SQLite works to minimize the amount of
+	// time that EXCLUSIVE locks are held.
+	LOCK_EXCLUSIVE LockLevel = 4 /* xLock() only */
+)
+
+// DeviceCharacteristic is a flag retuned by the [File] DeviceCharacteristics method.
+//
+// https://sqlite.org/c3ref/c_iocap_atomic.html
+type DeviceCharacteristic uint32
+
+const (
+	IOCAP_ATOMIC                DeviceCharacteristic = 0x00000001
+	IOCAP_ATOMIC512             DeviceCharacteristic = 0x00000002
+	IOCAP_ATOMIC1K              DeviceCharacteristic = 0x00000004
+	IOCAP_ATOMIC2K              DeviceCharacteristic = 0x00000008
+	IOCAP_ATOMIC4K              DeviceCharacteristic = 0x00000010
+	IOCAP_ATOMIC8K              DeviceCharacteristic = 0x00000020
+	IOCAP_ATOMIC16K             DeviceCharacteristic = 0x00000040
+	IOCAP_ATOMIC32K             DeviceCharacteristic = 0x00000080
+	IOCAP_ATOMIC64K             DeviceCharacteristic = 0x00000100
+	IOCAP_SAFE_APPEND           DeviceCharacteristic = 0x00000200
+	IOCAP_SEQUENTIAL            DeviceCharacteristic = 0x00000400
+	IOCAP_UNDELETABLE_WHEN_OPEN DeviceCharacteristic = 0x00000800
+	IOCAP_POWERSAFE_OVERWRITE   DeviceCharacteristic = 0x00001000
+	IOCAP_IMMUTABLE             DeviceCharacteristic = 0x00002000
+	IOCAP_BATCH_ATOMIC          DeviceCharacteristic = 0x00004000
+)
+
+// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html
+type _FcntlOpcode uint32
+
+const (
+	_FCNTL_LOCKSTATE             _FcntlOpcode = 1
+	_FCNTL_GET_LOCKPROXYFILE     _FcntlOpcode = 2
+	_FCNTL_SET_LOCKPROXYFILE     _FcntlOpcode = 3
+	_FCNTL_LAST_ERRNO            _FcntlOpcode = 4
+	_FCNTL_SIZE_HINT             _FcntlOpcode = 5
+	_FCNTL_CHUNK_SIZE            _FcntlOpcode = 6
+	_FCNTL_FILE_POINTER          _FcntlOpcode = 7
+	_FCNTL_SYNC_OMITTED          _FcntlOpcode = 8
+	_FCNTL_WIN32_AV_RETRY        _FcntlOpcode = 9
+	_FCNTL_PERSIST_WAL           _FcntlOpcode = 10
+	_FCNTL_OVERWRITE             _FcntlOpcode = 11
+	_FCNTL_VFSNAME               _FcntlOpcode = 12
+	_FCNTL_POWERSAFE_OVERWRITE   _FcntlOpcode = 13
+	_FCNTL_PRAGMA                _FcntlOpcode = 14
+	_FCNTL_BUSYHANDLER           _FcntlOpcode = 15
+	_FCNTL_TEMPFILENAME          _FcntlOpcode = 16
+	_FCNTL_MMAP_SIZE             _FcntlOpcode = 18
+	_FCNTL_TRACE                 _FcntlOpcode = 19
+	_FCNTL_HAS_MOVED             _FcntlOpcode = 20
+	_FCNTL_SYNC                  _FcntlOpcode = 21
+	_FCNTL_COMMIT_PHASETWO       _FcntlOpcode = 22
+	_FCNTL_WIN32_SET_HANDLE      _FcntlOpcode = 23
+	_FCNTL_WAL_BLOCK             _FcntlOpcode = 24
+	_FCNTL_ZIPVFS                _FcntlOpcode = 25
+	_FCNTL_RBU                   _FcntlOpcode = 26
+	_FCNTL_VFS_POINTER           _FcntlOpcode = 27
+	_FCNTL_JOURNAL_POINTER       _FcntlOpcode = 28
+	_FCNTL_WIN32_GET_HANDLE      _FcntlOpcode = 29
+	_FCNTL_PDB                   _FcntlOpcode = 30
+	_FCNTL_BEGIN_ATOMIC_WRITE    _FcntlOpcode = 31
+	_FCNTL_COMMIT_ATOMIC_WRITE   _FcntlOpcode = 32
+	_FCNTL_ROLLBACK_ATOMIC_WRITE _FcntlOpcode = 33
+	_FCNTL_LOCK_TIMEOUT          _FcntlOpcode = 34
+	_FCNTL_DATA_VERSION          _FcntlOpcode = 35
+	_FCNTL_SIZE_LIMIT            _FcntlOpcode = 36
+	_FCNTL_CKPT_DONE             _FcntlOpcode = 37
+	_FCNTL_RESERVE_BYTES         _FcntlOpcode = 38
+	_FCNTL_CKPT_START            _FcntlOpcode = 39
+	_FCNTL_EXTERNAL_READER       _FcntlOpcode = 40
+	_FCNTL_CKSM_FILE             _FcntlOpcode = 41
+	_FCNTL_RESET_CACHE           _FcntlOpcode = 42
+)
+
+// https://sqlite.org/c3ref/c_shm_exclusive.html
+type _ShmFlag uint32
+
+const (
+	_SHM_UNLOCK    _ShmFlag = 1
+	_SHM_LOCK      _ShmFlag = 2
+	_SHM_SHARED    _ShmFlag = 4
+	_SHM_EXCLUSIVE _ShmFlag = 8
+)

vendor/github.com/ncruces/go-sqlite3/vfs/file.go

@@ -0,0 +1,217 @@
+package vfs
+
+import (
+	"errors"
+	"io"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"runtime"
+	"syscall"
+
+	"github.com/ncruces/go-sqlite3/util/osutil"
+)
+
+type vfsOS struct{}
+
+func (vfsOS) FullPathname(path string) (string, error) {
+	path, err := filepath.Abs(path)
+	if err != nil {
+		return "", err
+	}
+	fi, err := os.Lstat(path)
+	if err != nil {
+		if errors.Is(err, fs.ErrNotExist) {
+			return path, nil
+		}
+		return "", err
+	}
+	if fi.Mode()&fs.ModeSymlink != 0 {
+		err = _OK_SYMLINK
+	}
+	return path, err
+}
+
+func (vfsOS) Delete(path string, syncDir bool) error {
+	err := os.Remove(path)
+	if err != nil {
+		if errors.Is(err, fs.ErrNotExist) {
+			return _IOERR_DELETE_NOENT
+		}
+		return err
+	}
+	if runtime.GOOS != "windows" && syncDir {
+		f, err := os.Open(filepath.Dir(path))
+		if err != nil {
+			return _OK
+		}
+		defer f.Close()
+		err = osSync(f, false, false)
+		if err != nil {
+			return _IOERR_DIR_FSYNC
+		}
+	}
+	return nil
+}
+
+func (vfsOS) Access(name string, flags AccessFlag) (bool, error) {
+	err := osAccess(name, flags)
+	if flags == ACCESS_EXISTS {
+		if errors.Is(err, fs.ErrNotExist) {
+			return false, nil
+		}
+	} else {
+		if errors.Is(err, fs.ErrPermission) {
+			return false, nil
+		}
+	}
+	return err == nil, err
+}
+
+func (vfsOS) Open(name string, flags OpenFlag) (File, OpenFlag, error) {
+	return nil, 0, _CANTOPEN
+}
+
+func (vfsOS) OpenFilename(name *Filename, flags OpenFlag) (File, OpenFlag, error) {
+	var oflags int
+	if flags&OPEN_EXCLUSIVE != 0 {
+		oflags |= os.O_EXCL
+	}
+	if flags&OPEN_CREATE != 0 {
+		oflags |= os.O_CREATE
+	}
+	if flags&OPEN_READONLY != 0 {
+		oflags |= os.O_RDONLY
+	}
+	if flags&OPEN_READWRITE != 0 {
+		oflags |= os.O_RDWR
+	}
+
+	var err error
+	var f *os.File
+	if name == nil {
+		f, err = os.CreateTemp("", "*.db")
+	} else {
+		f, err = osutil.OpenFile(name.String(), oflags, 0666)
+	}
+	if err != nil {
+		if errors.Is(err, syscall.EISDIR) {
+			return nil, flags, _CANTOPEN_ISDIR
+		}
+		return nil, flags, err
+	}
+
+	if modeof := name.URIParameter("modeof"); modeof != "" {
+		if err = osSetMode(f, modeof); err != nil {
+			f.Close()
+			return nil, flags, _IOERR_FSTAT
+		}
+	}
+	if flags&OPEN_DELETEONCLOSE != 0 {
+		os.Remove(f.Name())
+	}
+
+	file := vfsFile{
+		File:     f,
+		psow:     true,
+		readOnly: flags&OPEN_READONLY != 0,
+		syncDir: runtime.GOOS != "windows" &&
+			flags&(OPEN_CREATE) != 0 &&
+			flags&(OPEN_MAIN_JOURNAL|OPEN_SUPER_JOURNAL|OPEN_WAL) != 0,
+		shm: NewSharedMemory(name.String()+"-shm", flags),
+	}
+	return &file, flags, nil
+}
+
+type vfsFile struct {
+	*os.File
+	shm      SharedMemory
+	lock     LockLevel
+	readOnly bool
+	keepWAL  bool
+	syncDir  bool
+	psow     bool
+}
+
+var (
+	// Ensure these interfaces are implemented:
+	_ FileLockState          = &vfsFile{}
+	_ FileHasMoved           = &vfsFile{}
+	_ FileSizeHint           = &vfsFile{}
+	_ FilePersistentWAL      = &vfsFile{}
+	_ FilePowersafeOverwrite = &vfsFile{}
+)
+
+func (f *vfsFile) Close() error {
+	if f.shm != nil {
+		f.shm.Close()
+	}
+	return f.File.Close()
+}
+
+func (f *vfsFile) Sync(flags SyncFlag) error {
+	dataonly := (flags & SYNC_DATAONLY) != 0
+	fullsync := (flags & 0x0f) == SYNC_FULL
+
+	err := osSync(f.File, fullsync, dataonly)
+	if err != nil {
+		return err
+	}
+	if runtime.GOOS != "windows" && f.syncDir {
+		f.syncDir = false
+		d, err := os.Open(filepath.Dir(f.File.Name()))
+		if err != nil {
+			return nil
+		}
+		defer d.Close()
+		err = osSync(d, false, false)
+		if err != nil {
+			return _IOERR_DIR_FSYNC
+		}
+	}
+	return nil
+}
+
+func (f *vfsFile) Size() (int64, error) {
+	return f.Seek(0, io.SeekEnd)
+}
+
+func (f *vfsFile) SectorSize() int {
+	return _DEFAULT_SECTOR_SIZE
+}
+
+func (f *vfsFile) DeviceCharacteristics() DeviceCharacteristic {
+	var res DeviceCharacteristic
+	if osBatchAtomic(f.File) {
+		res |= IOCAP_BATCH_ATOMIC
+	}
+	if f.psow {
+		res |= IOCAP_POWERSAFE_OVERWRITE
+	}
+	return res
+}
+
+func (f *vfsFile) SizeHint(size int64) error {
+	return osAllocate(f.File, size)
+}
+
+func (f *vfsFile) HasMoved() (bool, error) {
+	fi, err := f.Stat()
+	if err != nil {
+		return false, err
+	}
+	pi, err := os.Stat(f.Name())
+	if err != nil {
+		if errors.Is(err, fs.ErrNotExist) {
+			return true, nil
+		}
+		return false, err
+	}
+	return !os.SameFile(fi, pi), nil
+}
+
+func (f *vfsFile) LockState() LockLevel            { return f.lock }
+func (f *vfsFile) PowersafeOverwrite() bool        { return f.psow }
+func (f *vfsFile) PersistentWAL() bool             { return f.keepWAL }
+func (f *vfsFile) SetPowersafeOverwrite(psow bool) { f.psow = psow }
+func (f *vfsFile) SetPersistentWAL(keepWAL bool)   { f.keepWAL = keepWAL }

vendor/github.com/ncruces/go-sqlite3/vfs/filename.go

@@ -0,0 +1,174 @@
+package vfs
+
+import (
+	"context"
+	"net/url"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+	"github.com/tetratelabs/wazero/api"
+)
+
+// Filename is used by SQLite to pass filenames
+// to the Open method of a VFS.
+//
+// https://sqlite.org/c3ref/filename.html
+type Filename struct {
+	ctx   context.Context
+	mod   api.Module
+	zPath uint32
+	flags OpenFlag
+	stack [2]uint64
+}
+
+// OpenFilename is an internal API users should not call directly.
+func OpenFilename(ctx context.Context, mod api.Module, id uint32, flags OpenFlag) *Filename {
+	if id == 0 {
+		return nil
+	}
+	return &Filename{
+		ctx:   ctx,
+		mod:   mod,
+		zPath: id,
+		flags: flags,
+	}
+}
+
+// String returns this filename as a string.
+func (n *Filename) String() string {
+	if n == nil || n.zPath == 0 {
+		return ""
+	}
+	return util.ReadString(n.mod, n.zPath, _MAX_PATHNAME)
+}
+
+// Database returns the name of the corresponding database file.
+//
+// https://sqlite.org/c3ref/filename_database.html
+func (n *Filename) Database() string {
+	return n.path("sqlite3_filename_database")
+}
+
+// Journal returns the name of the corresponding rollback journal file.
+//
+// https://sqlite.org/c3ref/filename_database.html
+func (n *Filename) Journal() string {
+	return n.path("sqlite3_filename_journal")
+}
+
+// Journal returns the name of the corresponding WAL file.
+//
+// https://sqlite.org/c3ref/filename_database.html
+func (n *Filename) WAL() string {
+	return n.path("sqlite3_filename_wal")
+}
+
+func (n *Filename) path(method string) string {
+	if n == nil || n.zPath == 0 {
+		return ""
+	}
+	n.stack[0] = uint64(n.zPath)
+	fn := n.mod.ExportedFunction(method)
+	if err := fn.CallWithStack(n.ctx, n.stack[:]); err != nil {
+		panic(err)
+	}
+	return util.ReadString(n.mod, uint32(n.stack[0]), _MAX_PATHNAME)
+}
+
+// DatabaseFile returns the main database [File] corresponding to a journal.
+//
+// https://sqlite.org/c3ref/database_file_object.html
+func (n *Filename) DatabaseFile() File {
+	if n == nil || n.zPath == 0 {
+		return nil
+	}
+	if n.flags&(OPEN_MAIN_DB|OPEN_MAIN_JOURNAL|OPEN_WAL) == 0 {
+		return nil
+	}
+
+	n.stack[0] = uint64(n.zPath)
+	fn := n.mod.ExportedFunction("sqlite3_database_file_object")
+	if err := fn.CallWithStack(n.ctx, n.stack[:]); err != nil {
+		panic(err)
+	}
+	file, _ := vfsFileGet(n.ctx, n.mod, uint32(n.stack[0])).(File)
+	return file
+}
+
+// URIParameter returns the value of a URI parameter.
+//
+// https://sqlite.org/c3ref/uri_boolean.html
+func (n *Filename) URIParameter(key string) string {
+	if n == nil || n.zPath == 0 {
+		return ""
+	}
+
+	uriKey := n.mod.ExportedFunction("sqlite3_uri_key")
+	n.stack[0] = uint64(n.zPath)
+	n.stack[1] = uint64(0)
+	if err := uriKey.CallWithStack(n.ctx, n.stack[:]); err != nil {
+		panic(err)
+	}
+
+	ptr := uint32(n.stack[0])
+	if ptr == 0 {
+		return ""
+	}
+
+	// Parse the format from:
+	// https://github.com/sqlite/sqlite/blob/b74eb0/src/pager.c#L4797-L4840
+	// This avoids having to alloc/free the key just to find a value.
+	for {
+		k := util.ReadString(n.mod, ptr, _MAX_NAME)
+		if k == "" {
+			return ""
+		}
+		ptr += uint32(len(k)) + 1
+
+		v := util.ReadString(n.mod, ptr, _MAX_NAME)
+		if k == key {
+			return v
+		}
+		ptr += uint32(len(v)) + 1
+	}
+}
+
+// URIParameters obtains values for URI parameters.
+//
+// https://sqlite.org/c3ref/uri_boolean.html
+func (n *Filename) URIParameters() url.Values {
+	if n == nil || n.zPath == 0 {
+		return nil
+	}
+
+	uriKey := n.mod.ExportedFunction("sqlite3_uri_key")
+	n.stack[0] = uint64(n.zPath)
+	n.stack[1] = uint64(0)
+	if err := uriKey.CallWithStack(n.ctx, n.stack[:]); err != nil {
+		panic(err)
+	}
+
+	ptr := uint32(n.stack[0])
+	if ptr == 0 {
+		return nil
+	}
+
+	var params url.Values
+
+	// Parse the format from:
+	// https://github.com/sqlite/sqlite/blob/b74eb0/src/pager.c#L4797-L4840
+	// This is the only way to support multiple valued keys.
+	for {
+		k := util.ReadString(n.mod, ptr, _MAX_NAME)
+		if k == "" {
+			return params
+		}
+		ptr += uint32(len(k)) + 1
+
+		v := util.ReadString(n.mod, ptr, _MAX_NAME)
+		if params == nil {
+			params = url.Values{}
+		}
+		params.Add(k, v)
+		ptr += uint32(len(v)) + 1
+	}
+}

vendor/github.com/ncruces/go-sqlite3/vfs/lock.go

@@ -0,0 +1,144 @@
+//go:build (linux || darwin || windows || freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) && !sqlite3_nosys
+
+package vfs
+
+import "github.com/ncruces/go-sqlite3/internal/util"
+
+// SupportsFileLocking is false on platforms that do not support file locking.
+// To open a database file on those platforms,
+// you need to use the [nolock] or [immutable] URI parameters.
+//
+// [nolock]: https://sqlite.org/uri.html#urinolock
+// [immutable]: https://sqlite.org/uri.html#uriimmutable
+const SupportsFileLocking = true
+
+const (
+	_PENDING_BYTE  = 0x40000000
+	_RESERVED_BYTE = (_PENDING_BYTE + 1)
+	_SHARED_FIRST  = (_PENDING_BYTE + 2)
+	_SHARED_SIZE   = 510
+)
+
+func (f *vfsFile) Lock(lock LockLevel) error {
+	// Argument check. SQLite never explicitly requests a pending lock.
+	if lock != LOCK_SHARED && lock != LOCK_RESERVED && lock != LOCK_EXCLUSIVE {
+		panic(util.AssertErr())
+	}
+
+	switch {
+	case f.lock < LOCK_NONE || f.lock > LOCK_EXCLUSIVE:
+		// Connection state check.
+		panic(util.AssertErr())
+	case f.lock == LOCK_NONE && lock > LOCK_SHARED:
+		// We never move from unlocked to anything higher than a shared lock.
+		panic(util.AssertErr())
+	case f.lock != LOCK_SHARED && lock == LOCK_RESERVED:
+		// A shared lock is always held when a reserved lock is requested.
+		panic(util.AssertErr())
+	}
+
+	// If we already have an equal or more restrictive lock, do nothing.
+	if f.lock >= lock {
+		return nil
+	}
+
+	// Do not allow any kind of write-lock on a read-only database.
+	if f.readOnly && lock >= LOCK_RESERVED {
+		return _IOERR_LOCK
+	}
+
+	switch lock {
+	case LOCK_SHARED:
+		// Must be unlocked to get SHARED.
+		if f.lock != LOCK_NONE {
+			panic(util.AssertErr())
+		}
+		if rc := osGetSharedLock(f.File); rc != _OK {
+			return rc
+		}
+		f.lock = LOCK_SHARED
+		return nil
+
+	case LOCK_RESERVED:
+		// Must be SHARED to get RESERVED.
+		if f.lock != LOCK_SHARED {
+			panic(util.AssertErr())
+		}
+		if rc := osGetReservedLock(f.File); rc != _OK {
+			return rc
+		}
+		f.lock = LOCK_RESERVED
+		return nil
+
+	case LOCK_EXCLUSIVE:
+		// Must be SHARED, RESERVED or PENDING to get EXCLUSIVE.
+		if f.lock <= LOCK_NONE || f.lock >= LOCK_EXCLUSIVE {
+			panic(util.AssertErr())
+		}
+		reserved := f.lock == LOCK_RESERVED
+		// A PENDING lock is needed before acquiring an EXCLUSIVE lock.
+		if f.lock < LOCK_PENDING {
+			// If we're already RESERVED, we can block indefinitely,
+			// since only new readers may briefly hold the PENDING lock.
+			if rc := osGetPendingLock(f.File, reserved /* block */); rc != _OK {
+				return rc
+			}
+			f.lock = LOCK_PENDING
+		}
+		// We already have PENDING, so we're just waiting for readers to leave.
+		// If we were RESERVED, we can wait for a little while, before invoking
+		// the busy handler; we will only do this once.
+		if rc := osGetExclusiveLock(f.File, reserved /* wait */); rc != _OK {
+			return rc
+		}
+		f.lock = LOCK_EXCLUSIVE
+		return nil
+
+	default:
+		panic(util.AssertErr())
+	}
+}
+
+func (f *vfsFile) Unlock(lock LockLevel) error {
+	// Argument check.
+	if lock != LOCK_NONE && lock != LOCK_SHARED {
+		panic(util.AssertErr())
+	}
+
+	// Connection state check.
+	if f.lock < LOCK_NONE || f.lock > LOCK_EXCLUSIVE {
+		panic(util.AssertErr())
+	}
+
+	// If we don't have a more restrictive lock, do nothing.
+	if f.lock <= lock {
+		return nil
+	}
+
+	switch lock {
+	case LOCK_SHARED:
+		rc := osDowngradeLock(f.File, f.lock)
+		f.lock = LOCK_SHARED
+		return rc
+
+	case LOCK_NONE:
+		rc := osReleaseLock(f.File, f.lock)
+		f.lock = LOCK_NONE
+		return rc
+
+	default:
+		panic(util.AssertErr())
+	}
+}
+
+func (f *vfsFile) CheckReservedLock() (bool, error) {
+	// Connection state check.
+	if f.lock < LOCK_NONE || f.lock > LOCK_EXCLUSIVE {
+		panic(util.AssertErr())
+	}
+
+	if f.lock >= LOCK_RESERVED {
+		return true, nil
+	}
+	return osCheckReservedLock(f.File)
+}

vendor/github.com/ncruces/go-sqlite3/vfs/lock_other.go

@@ -0,0 +1,23 @@
+//go:build !(linux || darwin || windows || freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) || sqlite3_nosys
+
+package vfs
+
+// SupportsFileLocking is false on platforms that do not support file locking.
+// To open a database file on those platforms,
+// you need to use the [nolock] or [immutable] URI parameters.
+//
+// [nolock]: https://sqlite.org/uri.html#urinolock
+// [immutable]: https://sqlite.org/uri.html#uriimmutable
+const SupportsFileLocking = false
+
+func (f *vfsFile) Lock(LockLevel) error {
+	return _IOERR_LOCK
+}
+
+func (f *vfsFile) Unlock(LockLevel) error {
+	return _IOERR_UNLOCK
+}
+
+func (f *vfsFile) CheckReservedLock() (bool, error) {
+	return false, _IOERR_CHECKRESERVEDLOCK
+}

vendor/github.com/ncruces/go-sqlite3/vfs/memdb/README.md

@@ -0,0 +1,9 @@
+# Go `"memdb"` SQLite VFS
+
+This package implements the [`"memdb"`](https://sqlite.org/src/doc/tip/src/memdb.c)
+SQLite VFS in pure Go.
+
+It has some benefits over the C version:
+- the memory backing the database needs not be contiguous,
+- the database can grow/shrink incrementally without copying,
+- reader-writer concurrency is slightly improved.

vendor/github.com/ncruces/go-sqlite3/vfs/memdb/api.go

@@ -0,0 +1,68 @@
+// Package memdb implements the "memdb" SQLite VFS.
+//
+// The "memdb" [vfs.VFS] allows the same in-memory database to be shared
+// among multiple database connections in the same process,
+// as long as the database name begins with "/".
+//
+// Importing package memdb registers the VFS:
+//
+//	import _ "github.com/ncruces/go-sqlite3/vfs/memdb"
+package memdb
+
+import (
+	"sync"
+
+	"github.com/ncruces/go-sqlite3/vfs"
+)
+
+func init() {
+	vfs.Register("memdb", memVFS{})
+}
+
+var (
+	memoryMtx sync.Mutex
+	// +checklocks:memoryMtx
+	memoryDBs = map[string]*memDB{}
+)
+
+// Create creates a shared memory database,
+// using data as its initial contents.
+// The new database takes ownership of data,
+// and the caller should not use data after this call.
+func Create(name string, data []byte) {
+	memoryMtx.Lock()
+	defer memoryMtx.Unlock()
+
+	db := &memDB{
+		refs: 1,
+		name: name,
+		size: int64(len(data)),
+	}
+
+	// Convert data from WAL to rollback journal.
+	if len(data) >= 20 && data[18] == 2 && data[19] == 2 {
+		data[18] = 1
+		data[19] = 1
+	}
+
+	sectors := divRoundUp(db.size, sectorSize)
+	db.data = make([]*[sectorSize]byte, sectors)
+	for i := range db.data {
+		sector := data[i*sectorSize:]
+		if len(sector) >= sectorSize {
+			db.data[i] = (*[sectorSize]byte)(sector)
+		} else {
+			db.data[i] = new([sectorSize]byte)
+			copy((*db.data[i])[:], sector)
+		}
+	}
+
+	memoryDBs[name] = db
+}
+
+// Delete deletes a shared memory database.
+func Delete(name string) {
+	memoryMtx.Lock()
+	defer memoryMtx.Unlock()
+	delete(memoryDBs, name)
+}

vendor/github.com/ncruces/go-sqlite3/vfs/memdb/memdb.go

@@ -0,0 +1,311 @@
+package memdb
+
+import (
+	"io"
+	"runtime"
+	"sync"
+	"time"
+
+	"github.com/ncruces/go-sqlite3"
+	"github.com/ncruces/go-sqlite3/vfs"
+)
+
+// Must be a multiple of 64K (the largest page size).
+const sectorSize = 65536
+
+type memVFS struct{}
+
+func (memVFS) Open(name string, flags vfs.OpenFlag) (vfs.File, vfs.OpenFlag, error) {
+	// For simplicity, we do not support reading or writing data
+	// across "sector" boundaries.
+	//
+	// This is not a problem for most SQLite file types:
+	// - databases, which only do page aligned reads/writes;
+	// - temp journals, as used by the sorter, which does the same:
+	//   https://github.com/sqlite/sqlite/blob/b74eb0/src/vdbesort.c#L409-L412
+	//
+	// We refuse to open all other file types,
+	// but returning OPEN_MEMORY means SQLite won't ask us to.
+	const types = vfs.OPEN_MAIN_DB |
+		vfs.OPEN_TEMP_DB |
+		vfs.OPEN_TEMP_JOURNAL
+	if flags&types == 0 {
+		return nil, flags, sqlite3.CANTOPEN
+	}
+
+	// A shared database has a name that begins with "/".
+	shared := len(name) > 1 && name[0] == '/'
+
+	var db *memDB
+	if shared {
+		name = name[1:]
+		memoryMtx.Lock()
+		defer memoryMtx.Unlock()
+		db = memoryDBs[name]
+	}
+	if db == nil {
+		if flags&vfs.OPEN_CREATE == 0 {
+			return nil, flags, sqlite3.CANTOPEN
+		}
+		db = &memDB{name: name}
+	}
+	if shared {
+		db.refs++ // +checklocksforce: memoryMtx is held
+		memoryDBs[name] = db
+	}
+
+	return &memFile{
+		memDB:    db,
+		readOnly: flags&vfs.OPEN_READONLY != 0,
+	}, flags | vfs.OPEN_MEMORY, nil
+}
+
+func (memVFS) Delete(name string, dirSync bool) error {
+	return sqlite3.IOERR_DELETE
+}
+
+func (memVFS) Access(name string, flag vfs.AccessFlag) (bool, error) {
+	return false, nil
+}
+
+func (memVFS) FullPathname(name string) (string, error) {
+	return name, nil
+}
+
+type memDB struct {
+	name string
+
+	// +checklocks:lockMtx
+	pending *memFile
+	// +checklocks:lockMtx
+	reserved *memFile
+
+	// +checklocks:dataMtx
+	data []*[sectorSize]byte
+
+	// +checklocks:dataMtx
+	size int64
+
+	// +checklocks:lockMtx
+	shared int
+
+	// +checklocks:memoryMtx
+	refs int
+
+	lockMtx sync.Mutex
+	dataMtx sync.RWMutex
+}
+
+func (m *memDB) release() {
+	memoryMtx.Lock()
+	defer memoryMtx.Unlock()
+	if m.refs--; m.refs == 0 && m == memoryDBs[m.name] {
+		delete(memoryDBs, m.name)
+	}
+}
+
+type memFile struct {
+	*memDB
+	lock     vfs.LockLevel
+	readOnly bool
+}
+
+var (
+	// Ensure these interfaces are implemented:
+	_ vfs.FileLockState = &memFile{}
+	_ vfs.FileSizeHint  = &memFile{}
+)
+
+func (m *memFile) Close() error {
+	m.release()
+	return m.Unlock(vfs.LOCK_NONE)
+}
+
+func (m *memFile) ReadAt(b []byte, off int64) (n int, err error) {
+	m.dataMtx.RLock()
+	defer m.dataMtx.RUnlock()
+
+	if off >= m.size {
+		return 0, io.EOF
+	}
+
+	base := off / sectorSize
+	rest := off % sectorSize
+	have := int64(sectorSize)
+	if base == int64(len(m.data))-1 {
+		have = modRoundUp(m.size, sectorSize)
+	}
+	n = copy(b, (*m.data[base])[rest:have])
+	if n < len(b) {
+		// Assume reads are page aligned.
+		return 0, io.ErrNoProgress
+	}
+	return n, nil
+}
+
+func (m *memFile) WriteAt(b []byte, off int64) (n int, err error) {
+	m.dataMtx.Lock()
+	defer m.dataMtx.Unlock()
+
+	base := off / sectorSize
+	rest := off % sectorSize
+	for base >= int64(len(m.data)) {
+		m.data = append(m.data, new([sectorSize]byte))
+	}
+	n = copy((*m.data[base])[rest:], b)
+	if n < len(b) {
+		// Assume writes are page aligned.
+		return n, io.ErrShortWrite
+	}
+	if size := off + int64(len(b)); size > m.size {
+		m.size = size
+	}
+	return n, nil
+}
+
+func (m *memFile) Truncate(size int64) error {
+	m.dataMtx.Lock()
+	defer m.dataMtx.Unlock()
+	return m.truncate(size)
+}
+
+// +checklocks:m.dataMtx
+func (m *memFile) truncate(size int64) error {
+	if size < m.size {
+		base := size / sectorSize
+		rest := size % sectorSize
+		if rest != 0 {
+			clear((*m.data[base])[rest:])
+		}
+	}
+	sectors := divRoundUp(size, sectorSize)
+	for sectors > int64(len(m.data)) {
+		m.data = append(m.data, new([sectorSize]byte))
+	}
+	clear(m.data[sectors:])
+	m.data = m.data[:sectors]
+	m.size = size
+	return nil
+}
+
+func (m *memFile) Sync(flag vfs.SyncFlag) error {
+	return nil
+}
+
+func (m *memFile) Size() (int64, error) {
+	m.dataMtx.RLock()
+	defer m.dataMtx.RUnlock()
+	return m.size, nil
+}
+
+const spinWait = 25 * time.Microsecond
+
+func (m *memFile) Lock(lock vfs.LockLevel) error {
+	if m.lock >= lock {
+		return nil
+	}
+
+	if m.readOnly && lock >= vfs.LOCK_RESERVED {
+		return sqlite3.IOERR_LOCK
+	}
+
+	m.lockMtx.Lock()
+	defer m.lockMtx.Unlock()
+
+	switch lock {
+	case vfs.LOCK_SHARED:
+		if m.pending != nil {
+			return sqlite3.BUSY
+		}
+		m.shared++
+
+	case vfs.LOCK_RESERVED:
+		if m.reserved != nil {
+			return sqlite3.BUSY
+		}
+		m.reserved = m
+
+	case vfs.LOCK_EXCLUSIVE:
+		if m.lock < vfs.LOCK_PENDING {
+			if m.pending != nil {
+				return sqlite3.BUSY
+			}
+			m.lock = vfs.LOCK_PENDING
+			m.pending = m
+		}
+
+		for before := time.Now(); m.shared > 1; {
+			if time.Since(before) > spinWait {
+				return sqlite3.BUSY
+			}
+			m.lockMtx.Unlock()
+			runtime.Gosched()
+			m.lockMtx.Lock()
+		}
+	}
+
+	m.lock = lock
+	return nil
+}
+
+func (m *memFile) Unlock(lock vfs.LockLevel) error {
+	if m.lock <= lock {
+		return nil
+	}
+
+	m.lockMtx.Lock()
+	defer m.lockMtx.Unlock()
+
+	if m.pending == m {
+		m.pending = nil
+	}
+	if m.reserved == m {
+		m.reserved = nil
+	}
+	if lock < vfs.LOCK_SHARED {
+		m.shared--
+	}
+	m.lock = lock
+	return nil
+}
+
+func (m *memFile) CheckReservedLock() (bool, error) {
+	if m.lock >= vfs.LOCK_RESERVED {
+		return true, nil
+	}
+	m.lockMtx.Lock()
+	defer m.lockMtx.Unlock()
+	return m.reserved != nil, nil
+}
+
+func (m *memFile) SectorSize() int {
+	return sectorSize
+}
+
+func (m *memFile) DeviceCharacteristics() vfs.DeviceCharacteristic {
+	return vfs.IOCAP_ATOMIC |
+		vfs.IOCAP_SEQUENTIAL |
+		vfs.IOCAP_SAFE_APPEND |
+		vfs.IOCAP_POWERSAFE_OVERWRITE
+}
+
+func (m *memFile) SizeHint(size int64) error {
+	m.dataMtx.Lock()
+	defer m.dataMtx.Unlock()
+	if size > m.size {
+		return m.truncate(size)
+	}
+	return nil
+}
+
+func (m *memFile) LockState() vfs.LockLevel {
+	return m.lock
+}
+
+func divRoundUp(a, b int64) int64 {
+	return (a + b - 1) / b
+}
+
+func modRoundUp(a, b int64) int64 {
+	return b - (b-a%b)%b
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_bsd.go

@@ -0,0 +1,33 @@
+//go:build (freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) && !sqlite3_nosys
+
+package vfs
+
+import (
+	"os"
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+func osUnlock(file *os.File, start, len int64) _ErrorCode {
+	if start == 0 && len == 0 {
+		err := unix.Flock(int(file.Fd()), unix.LOCK_UN)
+		if err != nil {
+			return _IOERR_UNLOCK
+		}
+	}
+	return _OK
+}
+
+func osLock(file *os.File, how int, def _ErrorCode) _ErrorCode {
+	err := unix.Flock(int(file.Fd()), how)
+	return osLockErrorCode(err, def)
+}
+
+func osReadLock(file *os.File, _ /*start*/, _ /*len*/ int64, _ /*timeout*/ time.Duration) _ErrorCode {
+	return osLock(file, unix.LOCK_SH|unix.LOCK_NB, _IOERR_RDLOCK)
+}
+
+func osWriteLock(file *os.File, _ /*start*/, _ /*len*/ int64, _ /*timeout*/ time.Duration) _ErrorCode {
+	return osLock(file, unix.LOCK_EX|unix.LOCK_NB, _IOERR_LOCK)
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_darwin.go

@@ -0,0 +1,95 @@
+//go:build !(sqlite3_flock || sqlite3_nosys)
+
+package vfs
+
+import (
+	"io"
+	"os"
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+const (
+	// https://github.com/apple/darwin-xnu/blob/main/bsd/sys/fcntl.h
+	_F_OFD_SETLK         = 90
+	_F_OFD_SETLKW        = 91
+	_F_OFD_SETLKWTIMEOUT = 93
+)
+
+type flocktimeout_t struct {
+	fl      unix.Flock_t
+	timeout unix.Timespec
+}
+
+func osSync(file *os.File, fullsync, _ /*dataonly*/ bool) error {
+	if fullsync {
+		return file.Sync()
+	}
+	return unix.Fsync(int(file.Fd()))
+}
+
+func osAllocate(file *os.File, size int64) error {
+	off, err := file.Seek(0, io.SeekEnd)
+	if err != nil {
+		return err
+	}
+	if size <= off {
+		return nil
+	}
+
+	store := unix.Fstore_t{
+		Flags:   unix.F_ALLOCATEALL | unix.F_ALLOCATECONTIG,
+		Posmode: unix.F_PEOFPOSMODE,
+		Offset:  0,
+		Length:  size - off,
+	}
+
+	// Try to get a continuous chunk of disk space.
+	err = unix.FcntlFstore(file.Fd(), unix.F_PREALLOCATE, &store)
+	if err != nil {
+		// OK, perhaps we are too fragmented, allocate non-continuous.
+		store.Flags = unix.F_ALLOCATEALL
+		unix.FcntlFstore(file.Fd(), unix.F_PREALLOCATE, &store)
+	}
+	return file.Truncate(size)
+}
+
+func osUnlock(file *os.File, start, len int64) _ErrorCode {
+	err := unix.FcntlFlock(file.Fd(), _F_OFD_SETLK, &unix.Flock_t{
+		Type:  unix.F_UNLCK,
+		Start: start,
+		Len:   len,
+	})
+	if err != nil {
+		return _IOERR_UNLOCK
+	}
+	return _OK
+}
+
+func osLock(file *os.File, typ int16, start, len int64, timeout time.Duration, def _ErrorCode) _ErrorCode {
+	lock := flocktimeout_t{fl: unix.Flock_t{
+		Type:  typ,
+		Start: start,
+		Len:   len,
+	}}
+	var err error
+	switch {
+	case timeout == 0:
+		err = unix.FcntlFlock(file.Fd(), _F_OFD_SETLK, &lock.fl)
+	case timeout < 0:
+		err = unix.FcntlFlock(file.Fd(), _F_OFD_SETLKW, &lock.fl)
+	default:
+		lock.timeout = unix.NsecToTimespec(int64(timeout / time.Nanosecond))
+		err = unix.FcntlFlock(file.Fd(), _F_OFD_SETLKWTIMEOUT, &lock.fl)
+	}
+	return osLockErrorCode(err, def)
+}
+
+func osReadLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
+	return osLock(file, unix.F_RDLCK, start, len, timeout, _IOERR_RDLOCK)
+}
+
+func osWriteLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
+	return osLock(file, unix.F_WRLCK, start, len, timeout, _IOERR_LOCK)
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_f2fs_linux.go

@@ -0,0 +1,34 @@
+//go:build (amd64 || arm64 || riscv64) && !sqlite3_nosys
+
+package vfs
+
+import (
+	"os"
+
+	"golang.org/x/sys/unix"
+)
+
+const (
+	_F2FS_IOC_START_ATOMIC_WRITE  = 62721
+	_F2FS_IOC_COMMIT_ATOMIC_WRITE = 62722
+	_F2FS_IOC_ABORT_ATOMIC_WRITE  = 62725
+	_F2FS_IOC_GET_FEATURES        = 2147808524
+	_F2FS_FEATURE_ATOMIC_WRITE    = 4
+)
+
+func osBatchAtomic(file *os.File) bool {
+	flags, err := unix.IoctlGetInt(int(file.Fd()), _F2FS_IOC_GET_FEATURES)
+	return err == nil && flags&_F2FS_FEATURE_ATOMIC_WRITE != 0
+}
+
+func (f *vfsFile) BeginAtomicWrite() error {
+	return unix.IoctlSetInt(int(f.Fd()), _F2FS_IOC_START_ATOMIC_WRITE, 0)
+}
+
+func (f *vfsFile) CommitAtomicWrite() error {
+	return unix.IoctlSetInt(int(f.Fd()), _F2FS_IOC_COMMIT_ATOMIC_WRITE, 0)
+}
+
+func (f *vfsFile) RollbackAtomicWrite() error {
+	return unix.IoctlSetInt(int(f.Fd()), _F2FS_IOC_ABORT_ATOMIC_WRITE, 0)
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_linux.go

@@ -0,0 +1,71 @@
+//go:build !(sqlite3_flock || sqlite3_nosys)
+
+package vfs
+
+import (
+	"math/rand"
+	"os"
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+func osSync(file *os.File, _ /*fullsync*/, _ /*dataonly*/ bool) error {
+	// SQLite trusts Linux's fdatasync for all fsync's.
+	return unix.Fdatasync(int(file.Fd()))
+}
+
+func osAllocate(file *os.File, size int64) error {
+	if size == 0 {
+		return nil
+	}
+	return unix.Fallocate(int(file.Fd()), 0, 0, size)
+}
+
+func osUnlock(file *os.File, start, len int64) _ErrorCode {
+	err := unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &unix.Flock_t{
+		Type:  unix.F_UNLCK,
+		Start: start,
+		Len:   len,
+	})
+	if err != nil {
+		return _IOERR_UNLOCK
+	}
+	return _OK
+}
+
+func osLock(file *os.File, typ int16, start, len int64, timeout time.Duration, def _ErrorCode) _ErrorCode {
+	lock := unix.Flock_t{
+		Type:  typ,
+		Start: start,
+		Len:   len,
+	}
+	var err error
+	switch {
+	case timeout == 0:
+		err = unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &lock)
+	case timeout < 0:
+		err = unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLKW, &lock)
+	default:
+		before := time.Now()
+		for {
+			err = unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &lock)
+			if errno, _ := err.(unix.Errno); errno != unix.EAGAIN {
+				break
+			}
+			if timeout < time.Since(before) {
+				break
+			}
+			osSleep(time.Duration(rand.Int63n(int64(time.Millisecond))))
+		}
+	}
+	return osLockErrorCode(err, def)
+}
+
+func osReadLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
+	return osLock(file, unix.F_RDLCK, start, len, timeout, _IOERR_RDLOCK)
+}
+
+func osWriteLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
+	return osLock(file, unix.F_WRLCK, start, len, timeout, _IOERR_LOCK)
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_std_access.go

@@ -0,0 +1,36 @@
+//go:build !unix || sqlite3_nosys
+
+package vfs
+
+import (
+	"io/fs"
+	"os"
+)
+
+func osAccess(path string, flags AccessFlag) error {
+	fi, err := os.Stat(path)
+	if err != nil {
+		return err
+	}
+	if flags == ACCESS_EXISTS {
+		return nil
+	}
+
+	const (
+		S_IREAD  = 0400
+		S_IWRITE = 0200
+		S_IEXEC  = 0100
+	)
+
+	var want fs.FileMode = S_IREAD
+	if flags == ACCESS_READWRITE {
+		want |= S_IWRITE
+	}
+	if fi.IsDir() {
+		want |= S_IEXEC
+	}
+	if fi.Mode()&want != want {
+		return fs.ErrPermission
+	}
+	return nil
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_std_alloc.go

@@ -0,0 +1,19 @@
+//go:build !(linux || darwin) || sqlite3_flock || sqlite3_nosys
+
+package vfs
+
+import (
+	"io"
+	"os"
+)
+
+func osAllocate(file *os.File, size int64) error {
+	off, err := file.Seek(0, io.SeekEnd)
+	if err != nil {
+		return err
+	}
+	if size <= off {
+		return nil
+	}
+	return file.Truncate(size)
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_std_atomic.go

@@ -0,0 +1,9 @@
+//go:build !linux || !(amd64 || arm64 || riscv64) || sqlite3_nosys
+
+package vfs
+
+import "os"
+
+func osBatchAtomic(*os.File) bool {
+	return false
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_std_mode.go

@@ -0,0 +1,14 @@
+//go:build !unix || sqlite3_nosys
+
+package vfs
+
+import "os"
+
+func osSetMode(file *os.File, modeof string) error {
+	fi, err := os.Stat(modeof)
+	if err != nil {
+		return err
+	}
+	file.Chmod(fi.Mode())
+	return nil
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_std_sleep.go

@@ -0,0 +1,9 @@
+//go:build !windows || sqlite3_nosys
+
+package vfs
+
+import "time"
+
+func osSleep(d time.Duration) {
+	time.Sleep(d)
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_std_sync.go

@@ -0,0 +1,9 @@
+//go:build !(linux || darwin) || sqlite3_flock || sqlite3_nosys
+
+package vfs
+
+import "os"
+
+func osSync(file *os.File, _ /*fullsync*/, _ /*dataonly*/ bool) error {
+	return file.Sync()
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_unix.go

@@ -0,0 +1,33 @@
+//go:build unix && !sqlite3_nosys
+
+package vfs
+
+import (
+	"os"
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
+
+func osAccess(path string, flags AccessFlag) error {
+	var access uint32 // unix.F_OK
+	switch flags {
+	case ACCESS_READWRITE:
+		access = unix.R_OK | unix.W_OK
+	case ACCESS_READ:
+		access = unix.R_OK
+	}
+	return unix.Access(path, access)
+}
+
+func osSetMode(file *os.File, modeof string) error {
+	fi, err := os.Stat(modeof)
+	if err != nil {
+		return err
+	}
+	file.Chmod(fi.Mode())
+	if sys, ok := fi.Sys().(*syscall.Stat_t); ok {
+		file.Chown(int(sys.Uid), int(sys.Gid))
+	}
+	return nil
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_unix_lock.go

@@ -0,0 +1,106 @@
+//go:build (linux || darwin || freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) && !sqlite3_nosys
+
+package vfs
+
+import (
+	"os"
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+func osGetSharedLock(file *os.File) _ErrorCode {
+	// Test the PENDING lock before acquiring a new SHARED lock.
+	if lock, _ := osGetLock(file, _PENDING_BYTE, 1); lock == unix.F_WRLCK {
+		return _BUSY
+	}
+	// Acquire the SHARED lock.
+	return osReadLock(file, _SHARED_FIRST, _SHARED_SIZE, 0)
+}
+
+func osGetReservedLock(file *os.File) _ErrorCode {
+	// Acquire the RESERVED lock.
+	return osWriteLock(file, _RESERVED_BYTE, 1, 0)
+}
+
+func osGetPendingLock(file *os.File, block bool) _ErrorCode {
+	var timeout time.Duration
+	if block {
+		timeout = -1
+	}
+	// Acquire the PENDING lock.
+	return osWriteLock(file, _PENDING_BYTE, 1, timeout)
+}
+
+func osGetExclusiveLock(file *os.File, wait bool) _ErrorCode {
+	var timeout time.Duration
+	if wait {
+		timeout = time.Millisecond
+	}
+	// Acquire the EXCLUSIVE lock.
+	return osWriteLock(file, _SHARED_FIRST, _SHARED_SIZE, timeout)
+}
+
+func osDowngradeLock(file *os.File, state LockLevel) _ErrorCode {
+	if state >= LOCK_EXCLUSIVE {
+		// Downgrade to a SHARED lock.
+		if rc := osReadLock(file, _SHARED_FIRST, _SHARED_SIZE, 0); rc != _OK {
+			// In theory, the downgrade to a SHARED cannot fail because another
+			// process is holding an incompatible lock. If it does, this
+			// indicates that the other process is not following the locking
+			// protocol. If this happens, return _IOERR_RDLOCK. Returning
+			// BUSY would confuse the upper layer.
+			return _IOERR_RDLOCK
+		}
+	}
+	// Release the PENDING and RESERVED locks.
+	return osUnlock(file, _PENDING_BYTE, 2)
+}
+
+func osReleaseLock(file *os.File, _ LockLevel) _ErrorCode {
+	// Release all locks.
+	return osUnlock(file, 0, 0)
+}
+
+func osCheckReservedLock(file *os.File) (bool, _ErrorCode) {
+	// Test the RESERVED lock.
+	lock, rc := osGetLock(file, _RESERVED_BYTE, 1)
+	return lock == unix.F_WRLCK, rc
+}
+
+func osGetLock(file *os.File, start, len int64) (int16, _ErrorCode) {
+	lock := unix.Flock_t{
+		Type:  unix.F_WRLCK,
+		Start: start,
+		Len:   len,
+	}
+	if unix.FcntlFlock(file.Fd(), unix.F_GETLK, &lock) != nil {
+		return 0, _IOERR_CHECKRESERVEDLOCK
+	}
+	return lock.Type, _OK
+}
+
+func osLockErrorCode(err error, def _ErrorCode) _ErrorCode {
+	if err == nil {
+		return _OK
+	}
+	if errno, ok := err.(unix.Errno); ok {
+		switch errno {
+		case
+			unix.EACCES,
+			unix.EAGAIN,
+			unix.EBUSY,
+			unix.EINTR,
+			unix.ENOLCK,
+			unix.EDEADLK,
+			unix.ETIMEDOUT:
+			return _BUSY
+		case unix.EPERM:
+			return _PERM
+		}
+		if errno == unix.EWOULDBLOCK && unix.EWOULDBLOCK != unix.EAGAIN {
+			return _BUSY
+		}
+	}
+	return def
+}

vendor/github.com/ncruces/go-sqlite3/vfs/os_windows.go

@@ -0,0 +1,186 @@
+//go:build !sqlite3_nosys
+
+package vfs
+
+import (
+	"math/rand"
+	"os"
+	"time"
+
+	"golang.org/x/sys/windows"
+)
+
+func osGetSharedLock(file *os.File) _ErrorCode {
+	// Acquire the PENDING lock temporarily before acquiring a new SHARED lock.
+	rc := osReadLock(file, _PENDING_BYTE, 1, 0)
+	if rc == _OK {
+		// Acquire the SHARED lock.
+		rc = osReadLock(file, _SHARED_FIRST, _SHARED_SIZE, 0)
+
+		// Release the PENDING lock.
+		osUnlock(file, _PENDING_BYTE, 1)
+	}
+	return rc
+}
+
+func osGetReservedLock(file *os.File) _ErrorCode {
+	// Acquire the RESERVED lock.
+	return osWriteLock(file, _RESERVED_BYTE, 1, 0)
+}
+
+func osGetPendingLock(file *os.File, block bool) _ErrorCode {
+	var timeout time.Duration
+	if block {
+		timeout = -1
+	}
+
+	// Acquire the PENDING lock.
+	return osWriteLock(file, _PENDING_BYTE, 1, timeout)
+}
+
+func osGetExclusiveLock(file *os.File, wait bool) _ErrorCode {
+	var timeout time.Duration
+	if wait {
+		timeout = time.Millisecond
+	}
+
+	// Release the SHARED lock.
+	osUnlock(file, _SHARED_FIRST, _SHARED_SIZE)
+
+	// Acquire the EXCLUSIVE lock.
+	rc := osWriteLock(file, _SHARED_FIRST, _SHARED_SIZE, timeout)
+
+	if rc != _OK {
+		// Reacquire the SHARED lock.
+		osReadLock(file, _SHARED_FIRST, _SHARED_SIZE, 0)
+	}
+	return rc
+}
+
+func osDowngradeLock(file *os.File, state LockLevel) _ErrorCode {
+	if state >= LOCK_EXCLUSIVE {
+		// Release the EXCLUSIVE lock.
+		osUnlock(file, _SHARED_FIRST, _SHARED_SIZE)
+
+		// Reacquire the SHARED lock.
+		if rc := osReadLock(file, _SHARED_FIRST, _SHARED_SIZE, 0); rc != _OK {
+			// This should never happen.
+			// We should always be able to reacquire the read lock.
+			return _IOERR_RDLOCK
+		}
+	}
+
+	// Release the PENDING and RESERVED locks.
+	if state >= LOCK_RESERVED {
+		osUnlock(file, _RESERVED_BYTE, 1)
+	}
+	if state >= LOCK_PENDING {
+		osUnlock(file, _PENDING_BYTE, 1)
+	}
+	return _OK
+}
+
+func osReleaseLock(file *os.File, state LockLevel) _ErrorCode {
+	// Release all locks.
+	if state >= LOCK_RESERVED {
+		osUnlock(file, _RESERVED_BYTE, 1)
+	}
+	if state >= LOCK_SHARED {
+		osUnlock(file, _SHARED_FIRST, _SHARED_SIZE)
+	}
+	if state >= LOCK_PENDING {
+		osUnlock(file, _PENDING_BYTE, 1)
+	}
+	return _OK
+}
+
+func osCheckReservedLock(file *os.File) (bool, _ErrorCode) {
+	// Test the RESERVED lock.
+	rc := osLock(file, 0, _RESERVED_BYTE, 1, 0, _IOERR_CHECKRESERVEDLOCK)
+	if rc == _BUSY {
+		return true, _OK
+	}
+	if rc == _OK {
+		// Release the RESERVED lock.
+		osUnlock(file, _RESERVED_BYTE, 1)
+	}
+	return false, rc
+}
+
+func osUnlock(file *os.File, start, len uint32) _ErrorCode {
+	err := windows.UnlockFileEx(windows.Handle(file.Fd()),
+		0, len, 0, &windows.Overlapped{Offset: start})
+	if err == windows.ERROR_NOT_LOCKED {
+		return _OK
+	}
+	if err != nil {
+		return _IOERR_UNLOCK
+	}
+	return _OK
+}
+
+func osLock(file *os.File, flags, start, len uint32, timeout time.Duration, def _ErrorCode) _ErrorCode {
+	var err error
+	switch {
+	case timeout == 0:
+		err = osLockEx(file, flags|windows.LOCKFILE_FAIL_IMMEDIATELY, start, len)
+	case timeout < 0:
+		err = osLockEx(file, flags, start, len)
+	default:
+		before := time.Now()
+		for {
+			err = osLockEx(file, flags|windows.LOCKFILE_FAIL_IMMEDIATELY, start, len)
+			if errno, _ := err.(windows.Errno); errno != windows.ERROR_LOCK_VIOLATION {
+				break
+			}
+			if timeout < time.Since(before) {
+				break
+			}
+			osSleep(time.Duration(rand.Int63n(int64(time.Millisecond))))
+		}
+	}
+	return osLockErrorCode(err, def)
+}
+
+func osLockEx(file *os.File, flags, start, len uint32) error {
+	return windows.LockFileEx(windows.Handle(file.Fd()), flags,
+		0, len, 0, &windows.Overlapped{Offset: start})
+}
+
+func osReadLock(file *os.File, start, len uint32, timeout time.Duration) _ErrorCode {
+	return osLock(file, 0, start, len, timeout, _IOERR_RDLOCK)
+}
+
+func osWriteLock(file *os.File, start, len uint32, timeout time.Duration) _ErrorCode {
+	return osLock(file, windows.LOCKFILE_EXCLUSIVE_LOCK, start, len, timeout, _IOERR_LOCK)
+}
+
+func osLockErrorCode(err error, def _ErrorCode) _ErrorCode {
+	if err == nil {
+		return _OK
+	}
+	if errno, ok := err.(windows.Errno); ok {
+		// https://devblogs.microsoft.com/oldnewthing/20140905-00/?p=63
+		switch errno {
+		case
+			windows.ERROR_LOCK_VIOLATION,
+			windows.ERROR_IO_PENDING,
+			windows.ERROR_OPERATION_ABORTED:
+			return _BUSY
+		}
+	}
+	return def
+}
+
+func osSleep(d time.Duration) {
+	if d > 0 {
+		period := max(1, d/(5*time.Millisecond))
+		if period < 16 {
+			windows.TimeBeginPeriod(uint32(period))
+		}
+		time.Sleep(d)
+		if period < 16 {
+			windows.TimeEndPeriod(uint32(period))
+		}
+	}
+}

vendor/github.com/ncruces/go-sqlite3/vfs/registry.go

@@ -0,0 +1,48 @@
+package vfs
+
+import "sync"
+
+var (
+	// +checklocks:vfsRegistryMtx
+	vfsRegistry    map[string]VFS
+	vfsRegistryMtx sync.RWMutex
+)
+
+// Find returns a VFS given its name.
+// If there is no match, nil is returned.
+// If name is empty, the default VFS is returned.
+//
+// https://sqlite.org/c3ref/vfs_find.html
+func Find(name string) VFS {
+	if name == "" || name == "os" {
+		return vfsOS{}
+	}
+	vfsRegistryMtx.RLock()
+	defer vfsRegistryMtx.RUnlock()
+	return vfsRegistry[name]
+}
+
+// Register registers a VFS.
+// Empty and "os" are reserved names.
+//
+// https://sqlite.org/c3ref/vfs_find.html
+func Register(name string, vfs VFS) {
+	if name == "" || name == "os" {
+		return
+	}
+	vfsRegistryMtx.Lock()
+	defer vfsRegistryMtx.Unlock()
+	if vfsRegistry == nil {
+		vfsRegistry = map[string]VFS{}
+	}
+	vfsRegistry[name] = vfs
+}
+
+// Unregister unregisters a VFS.
+//
+// https://sqlite.org/c3ref/vfs_find.html
+func Unregister(name string) {
+	vfsRegistryMtx.Lock()
+	defer vfsRegistryMtx.Unlock()
+	delete(vfsRegistry, name)
+}

vendor/github.com/ncruces/go-sqlite3/vfs/shm.go

@@ -0,0 +1,173 @@
+//go:build (darwin || linux) && (amd64 || arm64 || riscv64) && !(sqlite3_flock || sqlite3_noshm || sqlite3_nosys)
+
+package vfs
+
+import (
+	"context"
+	"io"
+	"os"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+	"github.com/tetratelabs/wazero/api"
+	"golang.org/x/sys/unix"
+)
+
+// SupportsSharedMemory is false on platforms that do not support shared memory.
+// To use [WAL without shared-memory], you need to set [EXCLUSIVE locking mode].
+//
+// [WAL without shared-memory]: https://sqlite.org/wal.html#noshm
+// [EXCLUSIVE locking mode]: https://sqlite.org/pragma.html#pragma_locking_mode
+const SupportsSharedMemory = true
+
+const (
+	_SHM_NLOCK = 8
+	_SHM_BASE  = 120
+	_SHM_DMS   = _SHM_BASE + _SHM_NLOCK
+)
+
+func (f *vfsFile) SharedMemory() SharedMemory { return f.shm }
+
+// NewSharedMemory returns a shared-memory WAL-index
+// backed by a file with the given path.
+// It will return nil if shared-memory is not supported,
+// or not appropriate for the given flags.
+// Only [OPEN_MAIN_DB] databases may need a WAL-index.
+// You must ensure all concurrent accesses to a database
+// use shared-memory instances created with the same path.
+func NewSharedMemory(path string, flags OpenFlag) SharedMemory {
+	if flags&OPEN_MAIN_DB == 0 || flags&(OPEN_DELETEONCLOSE|OPEN_MEMORY) != 0 {
+		return nil
+	}
+	return &vfsShm{
+		path:     path,
+		readOnly: flags&OPEN_READONLY != 0,
+	}
+}
+
+type vfsShm struct {
+	*os.File
+	path     string
+	regions  []*util.MappedRegion
+	readOnly bool
+}
+
+func (s *vfsShm) shmMap(ctx context.Context, mod api.Module, id, size int32, extend bool) (uint32, error) {
+	// Ensure size is a multiple of the OS page size.
+	if int(size)&(unix.Getpagesize()-1) != 0 {
+		return 0, _IOERR_SHMMAP
+	}
+
+	if s.File == nil {
+		var flag int
+		if s.readOnly {
+			flag = unix.O_RDONLY
+		} else {
+			flag = unix.O_RDWR
+		}
+		f, err := os.OpenFile(s.path,
+			flag|unix.O_CREAT|unix.O_NOFOLLOW, 0666)
+		if err != nil {
+			return 0, _CANTOPEN
+		}
+		s.File = f
+	}
+
+	// Dead man's switch.
+	if lock, rc := osGetLock(s.File, _SHM_DMS, 1); rc != _OK {
+		return 0, _IOERR_LOCK
+	} else if lock == unix.F_WRLCK {
+		return 0, _BUSY
+	} else if lock == unix.F_UNLCK {
+		if s.readOnly {
+			return 0, _READONLY_CANTINIT
+		}
+		if rc := osWriteLock(s.File, _SHM_DMS, 1, 0); rc != _OK {
+			return 0, rc
+		}
+		if err := s.Truncate(0); err != nil {
+			return 0, _IOERR_SHMOPEN
+		}
+	}
+	if rc := osReadLock(s.File, _SHM_DMS, 1, 0); rc != _OK {
+		return 0, rc
+	}
+
+	// Check if file is big enough.
+	o, err := s.Seek(0, io.SeekEnd)
+	if err != nil {
+		return 0, _IOERR_SHMSIZE
+	}
+	if n := (int64(id) + 1) * int64(size); n > o {
+		if !extend {
+			return 0, nil
+		}
+		err := osAllocate(s.File, n)
+		if err != nil {
+			return 0, _IOERR_SHMSIZE
+		}
+	}
+
+	var prot int
+	if s.readOnly {
+		prot = unix.PROT_READ
+	} else {
+		prot = unix.PROT_READ | unix.PROT_WRITE
+	}
+	r, err := util.MapRegion(ctx, mod, s.File, int64(id)*int64(size), size, prot)
+	if err != nil {
+		return 0, err
+	}
+	s.regions = append(s.regions, r)
+	return r.Ptr, nil
+}
+
+func (s *vfsShm) shmLock(offset, n int32, flags _ShmFlag) error {
+	// Argument check.
+	if n <= 0 || offset < 0 || offset+n > _SHM_NLOCK {
+		panic(util.AssertErr())
+	}
+	switch flags {
+	case
+		_SHM_LOCK | _SHM_SHARED,
+		_SHM_LOCK | _SHM_EXCLUSIVE,
+		_SHM_UNLOCK | _SHM_SHARED,
+		_SHM_UNLOCK | _SHM_EXCLUSIVE:
+		//
+	default:
+		panic(util.AssertErr())
+	}
+	if n != 1 && flags&_SHM_EXCLUSIVE == 0 {
+		panic(util.AssertErr())
+	}
+
+	switch {
+	case flags&_SHM_UNLOCK != 0:
+		return osUnlock(s.File, _SHM_BASE+int64(offset), int64(n))
+	case flags&_SHM_SHARED != 0:
+		return osReadLock(s.File, _SHM_BASE+int64(offset), int64(n), 0)
+	case flags&_SHM_EXCLUSIVE != 0:
+		return osWriteLock(s.File, _SHM_BASE+int64(offset), int64(n), 0)
+	default:
+		panic(util.AssertErr())
+	}
+}
+
+func (s *vfsShm) shmUnmap(delete bool) {
+	if s.File == nil {
+		return
+	}
+
+	// Unmap regions.
+	for _, r := range s.regions {
+		r.Unmap()
+	}
+	clear(s.regions)
+	s.regions = s.regions[:0]
+
+	// Close the file.
+	defer s.Close()
+	if delete {
+		os.Remove(s.Name())
+	}
+	s.File = nil
+}