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gotosocial/vendor/github.com/bytedance/sonic/decoder/compiler.go
Daenney ecdc8379fa
[chore] Update gin to v1.9.0 (#1553)
2023-02-25 12:12:40 +00:00

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/*
* Copyright 2021 ByteDance Inc.
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package decoder
import (
`encoding/json`
`fmt`
`reflect`
`sort`
`strconv`
`strings`
`unsafe`
`github.com/bytedance/sonic/internal/caching`
`github.com/bytedance/sonic/internal/resolver`
`github.com/bytedance/sonic/internal/rt`
`github.com/bytedance/sonic/option`
)
type _Op uint8
const (
_OP_any _Op = iota + 1
_OP_dyn
_OP_str
_OP_bin
_OP_bool
_OP_num
_OP_i8
_OP_i16
_OP_i32
_OP_i64
_OP_u8
_OP_u16
_OP_u32
_OP_u64
_OP_f32
_OP_f64
_OP_unquote
_OP_nil_1
_OP_nil_2
_OP_nil_3
_OP_deref
_OP_index
_OP_is_null
_OP_is_null_quote
_OP_map_init
_OP_map_key_i8
_OP_map_key_i16
_OP_map_key_i32
_OP_map_key_i64
_OP_map_key_u8
_OP_map_key_u16
_OP_map_key_u32
_OP_map_key_u64
_OP_map_key_f32
_OP_map_key_f64
_OP_map_key_str
_OP_map_key_utext
_OP_map_key_utext_p
_OP_array_skip
_OP_array_clear
_OP_array_clear_p
_OP_slice_init
_OP_slice_append
_OP_object_skip
_OP_object_next
_OP_struct_field
_OP_unmarshal
_OP_unmarshal_p
_OP_unmarshal_text
_OP_unmarshal_text_p
_OP_lspace
_OP_match_char
_OP_check_char
_OP_load
_OP_save
_OP_drop
_OP_drop_2
_OP_recurse
_OP_goto
_OP_switch
_OP_check_char_0
_OP_dismatch_err
_OP_go_skip
_OP_add
_OP_debug
)
const (
_INT_SIZE = 32 << (^uint(0) >> 63)
_PTR_SIZE = 32 << (^uintptr(0) >> 63)
_PTR_BYTE = unsafe.Sizeof(uintptr(0))
)
const (
_MAX_ILBUF = 100000 // cutoff at 100k of IL instructions
_MAX_FIELDS = 50 // cutoff at 50 fields struct
)
var _OpNames = [256]string {
_OP_any : "any",
_OP_dyn : "dyn",
_OP_str : "str",
_OP_bin : "bin",
_OP_bool : "bool",
_OP_num : "num",
_OP_i8 : "i8",
_OP_i16 : "i16",
_OP_i32 : "i32",
_OP_i64 : "i64",
_OP_u8 : "u8",
_OP_u16 : "u16",
_OP_u32 : "u32",
_OP_u64 : "u64",
_OP_f32 : "f32",
_OP_f64 : "f64",
_OP_unquote : "unquote",
_OP_nil_1 : "nil_1",
_OP_nil_2 : "nil_2",
_OP_nil_3 : "nil_3",
_OP_deref : "deref",
_OP_index : "index",
_OP_is_null : "is_null",
_OP_is_null_quote : "is_null_quote",
_OP_map_init : "map_init",
_OP_map_key_i8 : "map_key_i8",
_OP_map_key_i16 : "map_key_i16",
_OP_map_key_i32 : "map_key_i32",
_OP_map_key_i64 : "map_key_i64",
_OP_map_key_u8 : "map_key_u8",
_OP_map_key_u16 : "map_key_u16",
_OP_map_key_u32 : "map_key_u32",
_OP_map_key_u64 : "map_key_u64",
_OP_map_key_f32 : "map_key_f32",
_OP_map_key_f64 : "map_key_f64",
_OP_map_key_str : "map_key_str",
_OP_map_key_utext : "map_key_utext",
_OP_map_key_utext_p : "map_key_utext_p",
_OP_array_skip : "array_skip",
_OP_slice_init : "slice_init",
_OP_slice_append : "slice_append",
_OP_object_skip : "object_skip",
_OP_object_next : "object_next",
_OP_struct_field : "struct_field",
_OP_unmarshal : "unmarshal",
_OP_unmarshal_p : "unmarshal_p",
_OP_unmarshal_text : "unmarshal_text",
_OP_unmarshal_text_p : "unmarshal_text_p",
_OP_lspace : "lspace",
_OP_match_char : "match_char",
_OP_check_char : "check_char",
_OP_load : "load",
_OP_save : "save",
_OP_drop : "drop",
_OP_drop_2 : "drop_2",
_OP_recurse : "recurse",
_OP_goto : "goto",
_OP_switch : "switch",
_OP_check_char_0 : "check_char_0",
_OP_dismatch_err : "dismatch_err",
_OP_add : "add",
}
func (self _Op) String() string {
if ret := _OpNames[self]; ret != "" {
return ret
} else {
return "<invalid>"
}
}
func _OP_int() _Op {
switch _INT_SIZE {
case 32: return _OP_i32
case 64: return _OP_i64
default: panic("unsupported int size")
}
}
func _OP_uint() _Op {
switch _INT_SIZE {
case 32: return _OP_u32
case 64: return _OP_u64
default: panic("unsupported uint size")
}
}
func _OP_uintptr() _Op {
switch _PTR_SIZE {
case 32: return _OP_u32
case 64: return _OP_u64
default: panic("unsupported pointer size")
}
}
func _OP_map_key_int() _Op {
switch _INT_SIZE {
case 32: return _OP_map_key_i32
case 64: return _OP_map_key_i64
default: panic("unsupported int size")
}
}
func _OP_map_key_uint() _Op {
switch _INT_SIZE {
case 32: return _OP_map_key_u32
case 64: return _OP_map_key_u64
default: panic("unsupported uint size")
}
}
func _OP_map_key_uintptr() _Op {
switch _PTR_SIZE {
case 32: return _OP_map_key_u32
case 64: return _OP_map_key_u64
default: panic("unsupported pointer size")
}
}
type _Instr struct {
u uint64 // union {op: 8, vb: 8, vi: 48}, iv maybe int or len([]int)
p unsafe.Pointer // maybe GoSlice.Data, *GoType or *caching.FieldMap
}
func packOp(op _Op) uint64 {
return uint64(op) << 56
}
func newInsOp(op _Op) _Instr {
return _Instr{u: packOp(op)}
}
func newInsVi(op _Op, vi int) _Instr {
return _Instr{u: packOp(op) | rt.PackInt(vi)}
}
func newInsVb(op _Op, vb byte) _Instr {
return _Instr{u: packOp(op) | (uint64(vb) << 48)}
}
func newInsVs(op _Op, vs []int) _Instr {
return _Instr {
u: packOp(op) | rt.PackInt(len(vs)),
p: (*rt.GoSlice)(unsafe.Pointer(&vs)).Ptr,
}
}
func newInsVt(op _Op, vt reflect.Type) _Instr {
return _Instr {
u: packOp(op),
p: unsafe.Pointer(rt.UnpackType(vt)),
}
}
func newInsVf(op _Op, vf *caching.FieldMap) _Instr {
return _Instr {
u: packOp(op),
p: unsafe.Pointer(vf),
}
}
func (self _Instr) op() _Op {
return _Op(self.u >> 56)
}
func (self _Instr) vi() int {
return rt.UnpackInt(self.u)
}
func (self _Instr) vb() byte {
return byte(self.u >> 48)
}
func (self _Instr) vs() (v []int) {
(*rt.GoSlice)(unsafe.Pointer(&v)).Ptr = self.p
(*rt.GoSlice)(unsafe.Pointer(&v)).Cap = self.vi()
(*rt.GoSlice)(unsafe.Pointer(&v)).Len = self.vi()
return
}
func (self _Instr) vf() *caching.FieldMap {
return (*caching.FieldMap)(self.p)
}
func (self _Instr) vk() reflect.Kind {
return (*rt.GoType)(self.p).Kind()
}
func (self _Instr) vt() reflect.Type {
return (*rt.GoType)(self.p).Pack()
}
func (self _Instr) i64() int64 {
return int64(self.vi())
}
func (self _Instr) vlen() int {
return int((*rt.GoType)(self.p).Size)
}
func (self _Instr) isBranch() bool {
switch self.op() {
case _OP_goto : fallthrough
case _OP_switch : fallthrough
case _OP_is_null : fallthrough
case _OP_is_null_quote : fallthrough
case _OP_check_char : return true
default : return false
}
}
func (self _Instr) disassemble() string {
switch self.op() {
case _OP_dyn : fallthrough
case _OP_deref : fallthrough
case _OP_map_key_i8 : fallthrough
case _OP_map_key_i16 : fallthrough
case _OP_map_key_i32 : fallthrough
case _OP_map_key_i64 : fallthrough
case _OP_map_key_u8 : fallthrough
case _OP_map_key_u16 : fallthrough
case _OP_map_key_u32 : fallthrough
case _OP_map_key_u64 : fallthrough
case _OP_map_key_f32 : fallthrough
case _OP_map_key_f64 : fallthrough
case _OP_map_key_str : fallthrough
case _OP_map_key_utext : fallthrough
case _OP_map_key_utext_p : fallthrough
case _OP_slice_init : fallthrough
case _OP_slice_append : fallthrough
case _OP_unmarshal : fallthrough
case _OP_unmarshal_p : fallthrough
case _OP_unmarshal_text : fallthrough
case _OP_unmarshal_text_p : fallthrough
case _OP_recurse : return fmt.Sprintf("%-18s%s", self.op(), self.vt())
case _OP_goto : fallthrough
case _OP_is_null_quote : fallthrough
case _OP_is_null : return fmt.Sprintf("%-18sL_%d", self.op(), self.vi())
case _OP_index : fallthrough
case _OP_array_clear : fallthrough
case _OP_array_clear_p : return fmt.Sprintf("%-18s%d", self.op(), self.vi())
case _OP_switch : return fmt.Sprintf("%-18s%s", self.op(), self.formatSwitchLabels())
case _OP_struct_field : return fmt.Sprintf("%-18s%s", self.op(), self.formatStructFields())
case _OP_match_char : return fmt.Sprintf("%-18s%s", self.op(), strconv.QuoteRune(rune(self.vb())))
case _OP_check_char : return fmt.Sprintf("%-18sL_%d, %s", self.op(), self.vi(), strconv.QuoteRune(rune(self.vb())))
default : return self.op().String()
}
}
func (self _Instr) formatSwitchLabels() string {
var i int
var v int
var m []string
/* format each label */
for i, v = range self.vs() {
m = append(m, fmt.Sprintf("%d=L_%d", i, v))
}
/* join them with "," */
return strings.Join(m, ", ")
}
func (self _Instr) formatStructFields() string {
var i uint64
var r []string
var m []struct{i int; n string}
/* extract all the fields */
for i = 0; i < self.vf().N; i++ {
if v := self.vf().At(i); v.Hash != 0 {
m = append(m, struct{i int; n string}{i: v.ID, n: v.Name})
}
}
/* sort by field name */
sort.Slice(m, func(i, j int) bool {
return m[i].n < m[j].n
})
/* format each field */
for _, v := range m {
r = append(r, fmt.Sprintf("%s=%d", v.n, v.i))
}
/* join them with "," */
return strings.Join(r, ", ")
}
type (
_Program []_Instr
)
func (self _Program) pc() int {
return len(self)
}
func (self _Program) tag(n int) {
if n >= _MaxStack {
panic("type nesting too deep")
}
}
func (self _Program) pin(i int) {
v := &self[i]
v.u &= 0xffff000000000000
v.u |= rt.PackInt(self.pc())
}
func (self _Program) rel(v []int) {
for _, i := range v {
self.pin(i)
}
}
func (self *_Program) add(op _Op) {
*self = append(*self, newInsOp(op))
}
func (self *_Program) int(op _Op, vi int) {
*self = append(*self, newInsVi(op, vi))
}
func (self *_Program) chr(op _Op, vb byte) {
*self = append(*self, newInsVb(op, vb))
}
func (self *_Program) tab(op _Op, vs []int) {
*self = append(*self, newInsVs(op, vs))
}
func (self *_Program) rtt(op _Op, vt reflect.Type) {
*self = append(*self, newInsVt(op, vt))
}
func (self *_Program) fmv(op _Op, vf *caching.FieldMap) {
*self = append(*self, newInsVf(op, vf))
}
func (self _Program) disassemble() string {
nb := len(self)
tab := make([]bool, nb + 1)
ret := make([]string, 0, nb + 1)
/* prescan to get all the labels */
for _, ins := range self {
if ins.isBranch() {
if ins.op() != _OP_switch {
tab[ins.vi()] = true
} else {
for _, v := range ins.vs() {
tab[v] = true
}
}
}
}
/* disassemble each instruction */
for i, ins := range self {
if !tab[i] {
ret = append(ret, "\t" + ins.disassemble())
} else {
ret = append(ret, fmt.Sprintf("L_%d:\n\t%s", i, ins.disassemble()))
}
}
/* add the last label, if needed */
if tab[nb] {
ret = append(ret, fmt.Sprintf("L_%d:", nb))
}
/* add an "end" indicator, and join all the strings */
return strings.Join(append(ret, "\tend"), "\n")
}
type _Compiler struct {
opts option.CompileOptions
tab map[reflect.Type]bool
rec map[reflect.Type]bool
}
func newCompiler() *_Compiler {
return &_Compiler {
opts: option.DefaultCompileOptions(),
tab: map[reflect.Type]bool{},
rec: map[reflect.Type]bool{},
}
}
func (self *_Compiler) apply(opts option.CompileOptions) *_Compiler {
self.opts = opts
return self
}
func (self *_Compiler) rescue(ep *error) {
if val := recover(); val != nil {
if err, ok := val.(error); ok {
*ep = err
} else {
panic(val)
}
}
}
func (self *_Compiler) compile(vt reflect.Type) (ret _Program, err error) {
defer self.rescue(&err)
self.compileOne(&ret, 0, vt)
return
}
func (self *_Compiler) compileOne(p *_Program, sp int, vt reflect.Type) {
/* check for recursive nesting */
ok := self.tab[vt]
if ok {
p.rtt(_OP_recurse, vt)
return
}
pt := reflect.PtrTo(vt)
/* check for `json.Unmarshaler` with pointer receiver */
if pt.Implements(jsonUnmarshalerType) {
p.rtt(_OP_unmarshal_p, pt)
return
}
/* check for `json.Unmarshaler` */
if vt.Implements(jsonUnmarshalerType) {
p.add(_OP_lspace)
self.compileUnmarshalJson(p, vt)
return
}
/* check for `encoding.TextMarshaler` with pointer receiver */
if pt.Implements(encodingTextUnmarshalerType) {
p.add(_OP_lspace)
self.compileUnmarshalTextPtr(p, pt)
return
}
/* check for `encoding.TextUnmarshaler` */
if vt.Implements(encodingTextUnmarshalerType) {
p.add(_OP_lspace)
self.compileUnmarshalText(p, vt)
return
}
/* enter the recursion */
p.add(_OP_lspace)
self.tab[vt] = true
self.compileOps(p, sp, vt)
delete(self.tab, vt)
}
func (self *_Compiler) compileOps(p *_Program, sp int, vt reflect.Type) {
switch vt.Kind() {
case reflect.Bool : self.compilePrimitive (vt, p, _OP_bool)
case reflect.Int : self.compilePrimitive (vt, p, _OP_int())
case reflect.Int8 : self.compilePrimitive (vt, p, _OP_i8)
case reflect.Int16 : self.compilePrimitive (vt, p, _OP_i16)
case reflect.Int32 : self.compilePrimitive (vt, p, _OP_i32)
case reflect.Int64 : self.compilePrimitive (vt, p, _OP_i64)
case reflect.Uint : self.compilePrimitive (vt, p, _OP_uint())
case reflect.Uint8 : self.compilePrimitive (vt, p, _OP_u8)
case reflect.Uint16 : self.compilePrimitive (vt, p, _OP_u16)
case reflect.Uint32 : self.compilePrimitive (vt, p, _OP_u32)
case reflect.Uint64 : self.compilePrimitive (vt, p, _OP_u64)
case reflect.Uintptr : self.compilePrimitive (vt, p, _OP_uintptr())
case reflect.Float32 : self.compilePrimitive (vt, p, _OP_f32)
case reflect.Float64 : self.compilePrimitive (vt, p, _OP_f64)
case reflect.String : self.compileString (p, vt)
case reflect.Array : self.compileArray (p, sp, vt)
case reflect.Interface : self.compileInterface (p, vt)
case reflect.Map : self.compileMap (p, sp, vt)
case reflect.Ptr : self.compilePtr (p, sp, vt)
case reflect.Slice : self.compileSlice (p, sp, vt)
case reflect.Struct : self.compileStruct (p, sp, vt)
default : panic (&json.UnmarshalTypeError{Type: vt})
}
}
func (self *_Compiler) compileMap(p *_Program, sp int, vt reflect.Type) {
if reflect.PtrTo(vt.Key()).Implements(encodingTextUnmarshalerType) {
self.compileMapOp(p, sp, vt, _OP_map_key_utext_p)
} else if vt.Key().Implements(encodingTextUnmarshalerType) {
self.compileMapOp(p, sp, vt, _OP_map_key_utext)
} else {
self.compileMapUt(p, sp, vt)
}
}
func (self *_Compiler) compileMapUt(p *_Program, sp int, vt reflect.Type) {
switch vt.Key().Kind() {
case reflect.Int : self.compileMapOp(p, sp, vt, _OP_map_key_int())
case reflect.Int8 : self.compileMapOp(p, sp, vt, _OP_map_key_i8)
case reflect.Int16 : self.compileMapOp(p, sp, vt, _OP_map_key_i16)
case reflect.Int32 : self.compileMapOp(p, sp, vt, _OP_map_key_i32)
case reflect.Int64 : self.compileMapOp(p, sp, vt, _OP_map_key_i64)
case reflect.Uint : self.compileMapOp(p, sp, vt, _OP_map_key_uint())
case reflect.Uint8 : self.compileMapOp(p, sp, vt, _OP_map_key_u8)
case reflect.Uint16 : self.compileMapOp(p, sp, vt, _OP_map_key_u16)
case reflect.Uint32 : self.compileMapOp(p, sp, vt, _OP_map_key_u32)
case reflect.Uint64 : self.compileMapOp(p, sp, vt, _OP_map_key_u64)
case reflect.Uintptr : self.compileMapOp(p, sp, vt, _OP_map_key_uintptr())
case reflect.Float32 : self.compileMapOp(p, sp, vt, _OP_map_key_f32)
case reflect.Float64 : self.compileMapOp(p, sp, vt, _OP_map_key_f64)
case reflect.String : self.compileMapOp(p, sp, vt, _OP_map_key_str)
default : panic(&json.UnmarshalTypeError{Type: vt})
}
}
func (self *_Compiler) compileMapOp(p *_Program, sp int, vt reflect.Type, op _Op) {
i := p.pc()
p.add(_OP_is_null)
p.tag(sp + 1)
skip := self.checkIfSkip(p, vt, '{')
p.add(_OP_save)
p.add(_OP_map_init)
p.add(_OP_save)
p.add(_OP_lspace)
j := p.pc()
p.chr(_OP_check_char, '}')
p.chr(_OP_match_char, '"')
skip2 := p.pc()
p.rtt(op, vt)
/* match the closing quote if needed */
if op != _OP_map_key_str && op != _OP_map_key_utext && op != _OP_map_key_utext_p {
p.chr(_OP_match_char, '"')
}
/* match the value separator */
p.add(_OP_lspace)
p.chr(_OP_match_char, ':')
self.compileOne(p, sp + 2, vt.Elem())
p.pin(skip2)
p.add(_OP_load)
k0 := p.pc()
p.add(_OP_lspace)
k1 := p.pc()
p.chr(_OP_check_char, '}')
p.chr(_OP_match_char, ',')
p.add(_OP_lspace)
p.chr(_OP_match_char, '"')
skip3 := p.pc()
p.rtt(op, vt)
/* match the closing quote if needed */
if op != _OP_map_key_str && op != _OP_map_key_utext && op != _OP_map_key_utext_p {
p.chr(_OP_match_char, '"')
}
/* match the value separator */
p.add(_OP_lspace)
p.chr(_OP_match_char, ':')
self.compileOne(p, sp + 2, vt.Elem())
p.pin(skip3)
p.add(_OP_load)
p.int(_OP_goto, k0)
p.pin(j)
p.pin(k1)
p.add(_OP_drop_2)
x := p.pc()
p.add(_OP_goto)
p.pin(i)
p.add(_OP_nil_1)
p.pin(skip)
p.pin(x)
}
func (self *_Compiler) compilePtr(p *_Program, sp int, et reflect.Type) {
i := p.pc()
p.add(_OP_is_null)
/* dereference all the way down */
for et.Kind() == reflect.Ptr {
et = et.Elem()
p.rtt(_OP_deref, et)
}
/* compile the element type */
self.compileOne(p, sp + 1, et)
j := p.pc()
p.add(_OP_goto)
p.pin(i)
p.add(_OP_nil_1)
p.pin(j)
}
func (self *_Compiler) compileArray(p *_Program, sp int, vt reflect.Type) {
x := p.pc()
p.add(_OP_is_null)
p.tag(sp)
skip := self.checkIfSkip(p, vt, '[')
p.add(_OP_save)
p.add(_OP_lspace)
v := []int{p.pc()}
p.chr(_OP_check_char, ']')
/* decode every item */
for i := 1; i <= vt.Len(); i++ {
self.compileOne(p, sp + 1, vt.Elem())
p.add(_OP_load)
p.int(_OP_index, i * int(vt.Elem().Size()))
p.add(_OP_lspace)
v = append(v, p.pc())
p.chr(_OP_check_char, ']')
p.chr(_OP_match_char, ',')
}
/* drop rest of the array */
p.add(_OP_array_skip)
w := p.pc()
p.add(_OP_goto)
p.rel(v)
/* check for pointer data */
if rt.UnpackType(vt.Elem()).PtrData == 0 {
p.int(_OP_array_clear, int(vt.Size()))
} else {
p.int(_OP_array_clear_p, int(vt.Size()))
}
/* restore the stack */
p.pin(w)
p.add(_OP_drop)
p.pin(skip)
p.pin(x)
}
func (self *_Compiler) compileSlice(p *_Program, sp int, vt reflect.Type) {
if vt.Elem().Kind() == byteType.Kind() {
self.compileSliceBin(p, sp, vt)
} else {
self.compileSliceList(p, sp, vt)
}
}
func (self *_Compiler) compileSliceBin(p *_Program, sp int, vt reflect.Type) {
i := p.pc()
p.add(_OP_is_null)
j := p.pc()
p.chr(_OP_check_char, '[')
skip := self.checkIfSkip(p, vt, '"')
k := p.pc()
p.chr(_OP_check_char, '"')
p.add(_OP_bin)
x := p.pc()
p.add(_OP_goto)
p.pin(j)
self.compileSliceBody(p, sp, vt.Elem())
y := p.pc()
p.add(_OP_goto)
p.pin(i)
p.pin(k)
p.add(_OP_nil_3)
p.pin(x)
p.pin(skip)
p.pin(y)
}
func (self *_Compiler) compileSliceList(p *_Program, sp int, vt reflect.Type) {
i := p.pc()
p.add(_OP_is_null)
p.tag(sp)
skip := self.checkIfSkip(p, vt, '[')
self.compileSliceBody(p, sp, vt.Elem())
x := p.pc()
p.add(_OP_goto)
p.pin(i)
p.add(_OP_nil_3)
p.pin(x)
p.pin(skip)
}
func (self *_Compiler) compileSliceBody(p *_Program, sp int, et reflect.Type) {
p.rtt(_OP_slice_init, et)
p.add(_OP_save)
p.add(_OP_lspace)
j := p.pc()
p.chr(_OP_check_char, ']')
p.rtt(_OP_slice_append, et)
self.compileOne(p, sp + 1, et)
p.add(_OP_load)
k0 := p.pc()
p.add(_OP_lspace)
k1 := p.pc()
p.chr(_OP_check_char, ']')
p.chr(_OP_match_char, ',')
p.rtt(_OP_slice_append, et)
self.compileOne(p, sp + 1, et)
p.add(_OP_load)
p.int(_OP_goto, k0)
p.pin(j)
p.pin(k1)
p.add(_OP_drop)
}
func (self *_Compiler) compileString(p *_Program, vt reflect.Type) {
if vt == jsonNumberType {
self.compilePrimitive(vt, p, _OP_num)
} else {
self.compileStringBody(vt, p)
}
}
func (self *_Compiler) compileStringBody(vt reflect.Type, p *_Program) {
i := p.pc()
p.add(_OP_is_null)
skip := self.checkIfSkip(p, vt, '"')
p.add(_OP_str)
p.pin(i)
p.pin(skip)
}
func (self *_Compiler) compileStruct(p *_Program, sp int, vt reflect.Type) {
if sp >= self.opts.MaxInlineDepth || p.pc() >= _MAX_ILBUF || (sp > 0 && vt.NumField() >= _MAX_FIELDS) {
p.rtt(_OP_recurse, vt)
if self.opts.RecursiveDepth > 0 {
self.rec[vt] = true
}
} else {
self.compileStructBody(p, sp, vt)
}
}
func (self *_Compiler) compileStructBody(p *_Program, sp int, vt reflect.Type) {
fv := resolver.ResolveStruct(vt)
fm, sw := caching.CreateFieldMap(len(fv)), make([]int, len(fv))
/* start of object */
p.tag(sp)
n := p.pc()
p.add(_OP_is_null)
skip := self.checkIfSkip(p, vt, '{')
p.add(_OP_save)
p.add(_OP_lspace)
x := p.pc()
p.chr(_OP_check_char, '}')
p.chr(_OP_match_char, '"')
p.fmv(_OP_struct_field, fm)
p.add(_OP_lspace)
p.chr(_OP_match_char, ':')
p.tab(_OP_switch, sw)
p.add(_OP_object_next)
y0 := p.pc()
p.add(_OP_lspace)
y1 := p.pc()
p.chr(_OP_check_char, '}')
p.chr(_OP_match_char, ',')
/* special case of an empty struct */
if len(fv) == 0 {
p.add(_OP_object_skip)
goto end_of_object
}
/* match the remaining fields */
p.add(_OP_lspace)
p.chr(_OP_match_char, '"')
p.fmv(_OP_struct_field, fm)
p.add(_OP_lspace)
p.chr(_OP_match_char, ':')
p.tab(_OP_switch, sw)
p.add(_OP_object_next)
p.int(_OP_goto, y0)
/* process each field */
for i, f := range fv {
sw[i] = p.pc()
fm.Set(f.Name, i)
/* index to the field */
for _, o := range f.Path {
if p.int(_OP_index, int(o.Size)); o.Kind == resolver.F_deref {
p.rtt(_OP_deref, o.Type)
}
}
/* check for "stringnize" option */
if (f.Opts & resolver.F_stringize) == 0 {
self.compileOne(p, sp + 1, f.Type)
} else {
self.compileStructFieldStr(p, sp + 1, f.Type)
}
/* load the state, and try next field */
p.add(_OP_load)
p.int(_OP_goto, y0)
}
end_of_object:
p.pin(x)
p.pin(y1)
p.add(_OP_drop)
p.pin(n)
p.pin(skip)
}
func (self *_Compiler) compileStructFieldStr(p *_Program, sp int, vt reflect.Type) {
n1 := -1
ft := vt
sv := false
/* dereference the pointer if needed */
if ft.Kind() == reflect.Ptr {
ft = ft.Elem()
}
/* check if it can be stringized */
switch ft.Kind() {
case reflect.Bool : sv = true
case reflect.Int : sv = true
case reflect.Int8 : sv = true
case reflect.Int16 : sv = true
case reflect.Int32 : sv = true
case reflect.Int64 : sv = true
case reflect.Uint : sv = true
case reflect.Uint8 : sv = true
case reflect.Uint16 : sv = true
case reflect.Uint32 : sv = true
case reflect.Uint64 : sv = true
case reflect.Uintptr : sv = true
case reflect.Float32 : sv = true
case reflect.Float64 : sv = true
case reflect.String : sv = true
}
/* if it's not, ignore the "string" and follow the regular path */
if !sv {
self.compileOne(p, sp, vt)
return
}
/* remove the leading space, and match the leading quote */
vk := vt.Kind()
p.add(_OP_lspace)
n0 := p.pc()
p.add(_OP_is_null)
skip := self.checkIfSkip(p, stringType, '"')
/* also check for inner "null" */
n1 = p.pc()
p.add(_OP_is_null_quote)
/* dereference the pointer only when it is not null */
if vk == reflect.Ptr {
vt = vt.Elem()
p.rtt(_OP_deref, vt)
}
n2 := p.pc()
p.chr(_OP_check_char_0, '"')
/* string opcode selector */
_OP_string := func() _Op {
if ft == jsonNumberType {
return _OP_num
} else {
return _OP_unquote
}
}
/* compile for each type */
switch vt.Kind() {
case reflect.Bool : p.add(_OP_bool)
case reflect.Int : p.add(_OP_int())
case reflect.Int8 : p.add(_OP_i8)
case reflect.Int16 : p.add(_OP_i16)
case reflect.Int32 : p.add(_OP_i32)
case reflect.Int64 : p.add(_OP_i64)
case reflect.Uint : p.add(_OP_uint())
case reflect.Uint8 : p.add(_OP_u8)
case reflect.Uint16 : p.add(_OP_u16)
case reflect.Uint32 : p.add(_OP_u32)
case reflect.Uint64 : p.add(_OP_u64)
case reflect.Uintptr : p.add(_OP_uintptr())
case reflect.Float32 : p.add(_OP_f32)
case reflect.Float64 : p.add(_OP_f64)
case reflect.String : p.add(_OP_string())
default : panic("not reachable")
}
/* the closing quote is not needed when parsing a pure string */
if vt == jsonNumberType || vt.Kind() != reflect.String {
p.chr(_OP_match_char, '"')
}
/* pin the `is_null_quote` jump location */
if n1 != -1 && vk != reflect.Ptr {
p.pin(n1)
}
/* "null" but not a pointer, act as if the field is not present */
if vk != reflect.Ptr {
pc2 := p.pc()
p.add(_OP_goto)
p.pin(n2)
p.rtt(_OP_dismatch_err, vt)
p.int(_OP_add, 1)
p.pin(pc2)
p.pin(n0)
return
}
/* the "null" case of the pointer */
pc := p.pc()
p.add(_OP_goto)
p.pin(n0) // `is_null` jump location
p.pin(n1) // `is_null_quote` jump location
p.add(_OP_nil_1)
pc2 := p.pc()
p.add(_OP_goto)
p.pin(n2)
p.rtt(_OP_dismatch_err, vt)
p.int(_OP_add, 1)
p.pin(pc)
p.pin(pc2)
p.pin(skip)
}
func (self *_Compiler) compileInterface(p *_Program, vt reflect.Type) {
i := p.pc()
p.add(_OP_is_null)
/* check for empty interface */
if vt.NumMethod() == 0 {
p.add(_OP_any)
} else {
p.rtt(_OP_dyn, vt)
}
/* finish the OpCode */
j := p.pc()
p.add(_OP_goto)
p.pin(i)
p.add(_OP_nil_2)
p.pin(j)
}
func (self *_Compiler) compilePrimitive(vt reflect.Type, p *_Program, op _Op) {
i := p.pc()
p.add(_OP_is_null)
// skip := self.checkPrimitive(p, vt)
p.add(op)
p.pin(i)
// p.pin(skip)
}
func (self *_Compiler) compileUnmarshalEnd(p *_Program, vt reflect.Type, i int) {
j := p.pc()
k := vt.Kind()
/* not a pointer */
if k != reflect.Ptr {
p.pin(i)
return
}
/* it seems that in Go JSON library, "null" takes priority over any kind of unmarshaler */
p.add(_OP_goto)
p.pin(i)
p.add(_OP_nil_1)
p.pin(j)
}
func (self *_Compiler) compileUnmarshalJson(p *_Program, vt reflect.Type) {
i := p.pc()
v := _OP_unmarshal
p.add(_OP_is_null)
/* check for dynamic interface */
if vt.Kind() == reflect.Interface {
v = _OP_dyn
}
/* call the unmarshaler */
p.rtt(v, vt)
self.compileUnmarshalEnd(p, vt, i)
}
func (self *_Compiler) compileUnmarshalText(p *_Program, vt reflect.Type) {
i := p.pc()
v := _OP_unmarshal_text
p.add(_OP_is_null)
/* check for dynamic interface */
if vt.Kind() == reflect.Interface {
v = _OP_dyn
} else {
p.chr(_OP_match_char, '"')
}
/* call the unmarshaler */
p.rtt(v, vt)
self.compileUnmarshalEnd(p, vt, i)
}
func (self *_Compiler) compileUnmarshalTextPtr(p *_Program, vt reflect.Type) {
i := p.pc()
p.add(_OP_is_null)
p.chr(_OP_match_char, '"')
p.rtt(_OP_unmarshal_text_p, vt)
p.pin(i)
}
func (self *_Compiler) checkIfSkip(p *_Program, vt reflect.Type, c byte) int {
j := p.pc()
p.chr(_OP_check_char_0, c)
p.rtt(_OP_dismatch_err, vt)
s := p.pc()
p.add(_OP_go_skip)
p.pin(j)
p.int(_OP_add, 1)
return s
}
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