mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-05 01:52:46 +00:00
199 lines
5.8 KiB
Go
199 lines
5.8 KiB
Go
// Copyright (C) MongoDB, Inc. 2017-present.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
// not use this file except in compliance with the License. You may obtain
|
|
// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
package bsoncodec
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
"reflect"
|
|
|
|
"go.mongodb.org/mongo-driver/bson/bsonoptions"
|
|
"go.mongodb.org/mongo-driver/bson/bsonrw"
|
|
"go.mongodb.org/mongo-driver/bson/bsontype"
|
|
)
|
|
|
|
// UIntCodec is the Codec used for uint values.
|
|
//
|
|
// Deprecated: UIntCodec will not be directly configurable in Go Driver 2.0. To
|
|
// configure the uint encode and decode behavior, use the configuration methods
|
|
// on a [go.mongodb.org/mongo-driver/bson.Encoder] or
|
|
// [go.mongodb.org/mongo-driver/bson.Decoder]. To configure the uint encode and
|
|
// decode behavior for a mongo.Client, use
|
|
// [go.mongodb.org/mongo-driver/mongo/options.ClientOptions.SetBSONOptions].
|
|
//
|
|
// For example, to configure a mongo.Client to marshal Go uint values as the
|
|
// minimum BSON int size that can represent the value, use:
|
|
//
|
|
// opt := options.Client().SetBSONOptions(&options.BSONOptions{
|
|
// IntMinSize: true,
|
|
// })
|
|
//
|
|
// See the deprecation notice for each field in UIntCodec for the corresponding
|
|
// settings.
|
|
type UIntCodec struct {
|
|
// EncodeToMinSize causes EncodeValue to marshal Go uint values (excluding uint64) as the
|
|
// minimum BSON int size (either 32-bit or 64-bit) that can represent the integer value.
|
|
//
|
|
// Deprecated: Use bson.Encoder.IntMinSize or options.BSONOptions.IntMinSize instead.
|
|
EncodeToMinSize bool
|
|
}
|
|
|
|
var (
|
|
defaultUIntCodec = NewUIntCodec()
|
|
|
|
// Assert that defaultUIntCodec satisfies the typeDecoder interface, which allows it to be used
|
|
// by collection type decoders (e.g. map, slice, etc) to set individual values in a collection.
|
|
_ typeDecoder = defaultUIntCodec
|
|
)
|
|
|
|
// NewUIntCodec returns a UIntCodec with options opts.
|
|
//
|
|
// Deprecated: NewUIntCodec will not be available in Go Driver 2.0. See
|
|
// [UIntCodec] for more details.
|
|
func NewUIntCodec(opts ...*bsonoptions.UIntCodecOptions) *UIntCodec {
|
|
uintOpt := bsonoptions.MergeUIntCodecOptions(opts...)
|
|
|
|
codec := UIntCodec{}
|
|
if uintOpt.EncodeToMinSize != nil {
|
|
codec.EncodeToMinSize = *uintOpt.EncodeToMinSize
|
|
}
|
|
return &codec
|
|
}
|
|
|
|
// EncodeValue is the ValueEncoder for uint types.
|
|
func (uic *UIntCodec) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
|
|
switch val.Kind() {
|
|
case reflect.Uint8, reflect.Uint16:
|
|
return vw.WriteInt32(int32(val.Uint()))
|
|
case reflect.Uint, reflect.Uint32, reflect.Uint64:
|
|
u64 := val.Uint()
|
|
|
|
// If ec.MinSize or if encodeToMinSize is true for a non-uint64 value we should write val as an int32
|
|
useMinSize := ec.MinSize || (uic.EncodeToMinSize && val.Kind() != reflect.Uint64)
|
|
|
|
if u64 <= math.MaxInt32 && useMinSize {
|
|
return vw.WriteInt32(int32(u64))
|
|
}
|
|
if u64 > math.MaxInt64 {
|
|
return fmt.Errorf("%d overflows int64", u64)
|
|
}
|
|
return vw.WriteInt64(int64(u64))
|
|
}
|
|
|
|
return ValueEncoderError{
|
|
Name: "UintEncodeValue",
|
|
Kinds: []reflect.Kind{reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint},
|
|
Received: val,
|
|
}
|
|
}
|
|
|
|
func (uic *UIntCodec) decodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
|
|
var i64 int64
|
|
var err error
|
|
switch vrType := vr.Type(); vrType {
|
|
case bsontype.Int32:
|
|
i32, err := vr.ReadInt32()
|
|
if err != nil {
|
|
return emptyValue, err
|
|
}
|
|
i64 = int64(i32)
|
|
case bsontype.Int64:
|
|
i64, err = vr.ReadInt64()
|
|
if err != nil {
|
|
return emptyValue, err
|
|
}
|
|
case bsontype.Double:
|
|
f64, err := vr.ReadDouble()
|
|
if err != nil {
|
|
return emptyValue, err
|
|
}
|
|
if !dc.Truncate && math.Floor(f64) != f64 {
|
|
return emptyValue, errCannotTruncate
|
|
}
|
|
if f64 > float64(math.MaxInt64) {
|
|
return emptyValue, fmt.Errorf("%g overflows int64", f64)
|
|
}
|
|
i64 = int64(f64)
|
|
case bsontype.Boolean:
|
|
b, err := vr.ReadBoolean()
|
|
if err != nil {
|
|
return emptyValue, err
|
|
}
|
|
if b {
|
|
i64 = 1
|
|
}
|
|
case bsontype.Null:
|
|
if err = vr.ReadNull(); err != nil {
|
|
return emptyValue, err
|
|
}
|
|
case bsontype.Undefined:
|
|
if err = vr.ReadUndefined(); err != nil {
|
|
return emptyValue, err
|
|
}
|
|
default:
|
|
return emptyValue, fmt.Errorf("cannot decode %v into an integer type", vrType)
|
|
}
|
|
|
|
switch t.Kind() {
|
|
case reflect.Uint8:
|
|
if i64 < 0 || i64 > math.MaxUint8 {
|
|
return emptyValue, fmt.Errorf("%d overflows uint8", i64)
|
|
}
|
|
|
|
return reflect.ValueOf(uint8(i64)), nil
|
|
case reflect.Uint16:
|
|
if i64 < 0 || i64 > math.MaxUint16 {
|
|
return emptyValue, fmt.Errorf("%d overflows uint16", i64)
|
|
}
|
|
|
|
return reflect.ValueOf(uint16(i64)), nil
|
|
case reflect.Uint32:
|
|
if i64 < 0 || i64 > math.MaxUint32 {
|
|
return emptyValue, fmt.Errorf("%d overflows uint32", i64)
|
|
}
|
|
|
|
return reflect.ValueOf(uint32(i64)), nil
|
|
case reflect.Uint64:
|
|
if i64 < 0 {
|
|
return emptyValue, fmt.Errorf("%d overflows uint64", i64)
|
|
}
|
|
|
|
return reflect.ValueOf(uint64(i64)), nil
|
|
case reflect.Uint:
|
|
if i64 < 0 || int64(uint(i64)) != i64 { // Can we fit this inside of an uint
|
|
return emptyValue, fmt.Errorf("%d overflows uint", i64)
|
|
}
|
|
|
|
return reflect.ValueOf(uint(i64)), nil
|
|
default:
|
|
return emptyValue, ValueDecoderError{
|
|
Name: "UintDecodeValue",
|
|
Kinds: []reflect.Kind{reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint},
|
|
Received: reflect.Zero(t),
|
|
}
|
|
}
|
|
}
|
|
|
|
// DecodeValue is the ValueDecoder for uint types.
|
|
func (uic *UIntCodec) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
|
|
if !val.CanSet() {
|
|
return ValueDecoderError{
|
|
Name: "UintDecodeValue",
|
|
Kinds: []reflect.Kind{reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint},
|
|
Received: val,
|
|
}
|
|
}
|
|
|
|
elem, err := uic.decodeType(dc, vr, val.Type())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
val.SetUint(elem.Uint())
|
|
return nil
|
|
}
|