[chore]: Bump github.com/gin-contrib/gzip from 1.0.1 to 1.1.0 (#3639)

Bumps [github.com/gin-contrib/gzip](https://github.com/gin-contrib/gzip) from 1.0.1 to 1.1.0.
- [Release notes](https://github.com/gin-contrib/gzip/releases)
- [Changelog](https://github.com/gin-contrib/gzip/blob/master/.goreleaser.yaml)
- [Commits](https://github.com/gin-contrib/gzip/compare/v1.0.1...v1.1.0)

---
updated-dependencies:
- dependency-name: github.com/gin-contrib/gzip
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

vendor/github.com/bytedance/sonic/internal/decoder/optdec/compile_struct.go

@@ -0,0 +1,174 @@
+package optdec
+
+import (
+	"fmt"
+	"reflect"
+
+	caching "github.com/bytedance/sonic/internal/optcaching"
+	"github.com/bytedance/sonic/internal/rt"
+	"github.com/bytedance/sonic/internal/resolver"
+)
+
+const (
+    _MAX_FIELDS = 50        // cutoff at 50 fields struct
+)
+
+func (c *compiler) compileIntStringOption(vt reflect.Type) decFunc {
+	switch vt.Size() {
+	case 4:
+		switch vt.Kind() {
+		case reflect.Uint:
+			fallthrough
+		case reflect.Uintptr:
+			return &u32StringDecoder{}
+		case reflect.Int:
+			return &i32StringDecoder{}
+		}
+	case 8:
+		switch vt.Kind() {
+		case reflect.Uint:
+			fallthrough
+		case reflect.Uintptr:
+			return &u64StringDecoder{}
+		case reflect.Int:
+			return &i64StringDecoder{}
+		}
+	default:
+		panic("not supported pointer size: " + fmt.Sprint(vt.Size()))
+	}
+	panic("unreachable")
+}
+
+func isInteger(vt reflect.Type) bool {
+	switch vt.Kind() {
+		case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint, reflect.Uintptr, reflect.Int: return true
+		default: return false
+	}
+}
+
+func (c *compiler) assertStringOptTypes(vt reflect.Type) {
+	if c.depth > _CompileMaxDepth {
+		panic(*stackOverflow)
+	}
+
+	c.depth += 1
+	defer func ()  {
+		c.depth -= 1
+	}()
+
+	if isInteger(vt) {
+		return
+	}
+
+	switch vt.Kind() {
+	case reflect.String, reflect.Bool, reflect.Float32, reflect.Float64:
+		return
+	case reflect.Ptr: c.assertStringOptTypes(vt.Elem())
+	default:
+		panicForInvalidStrType(vt)
+	}
+}
+
+func (c *compiler) compileFieldStringOption(vt reflect.Type) decFunc {
+	c.assertStringOptTypes(vt)
+	unmDec := c.tryCompilePtrUnmarshaler(vt, true)
+	if unmDec != nil { 
+		return unmDec
+	} 
+
+	switch vt.Kind() {
+	case reflect.String:
+		if vt == jsonNumberType {
+			return &numberStringDecoder{}
+		}
+		return &strStringDecoder{}
+	case reflect.Bool:
+		return &boolStringDecoder{}
+	case reflect.Int8:
+		return &i8StringDecoder{}
+	case reflect.Int16:
+		return &i16StringDecoder{}
+	case reflect.Int32:
+		return &i32StringDecoder{}
+	case reflect.Int64:
+		return &i64StringDecoder{}
+	case reflect.Uint8:
+		return &u8StringDecoder{}
+	case reflect.Uint16:
+		return &u16StringDecoder{}
+	case reflect.Uint32:
+		return &u32StringDecoder{}
+	case reflect.Uint64:
+		return &u64StringDecoder{}
+	case reflect.Float32:
+		return &f32StringDecoder{}
+	case reflect.Float64:
+		return &f64StringDecoder{}
+	case reflect.Uint:
+		fallthrough
+	case reflect.Uintptr:
+		fallthrough
+	case reflect.Int:
+		return c.compileIntStringOption(vt)
+	case reflect.Ptr:
+		return &ptrStrDecoder{
+			typ:   rt.UnpackType(vt.Elem()),
+			deref: c.compileFieldStringOption(vt.Elem()),
+		}
+	default:
+		panicForInvalidStrType(vt)
+		return nil
+	}
+}
+
+func (c *compiler) compileStruct(vt reflect.Type) decFunc {
+	c.enter(vt)
+	defer c.exit(vt)
+	if c.namedPtr {
+		c.namedPtr = false
+		return c.compileStructBody(vt)
+	}
+
+	if c.depth >= c.opts.MaxInlineDepth + 1 || (c.counts > 0 &&  vt.NumField() >= _MAX_FIELDS) {
+		return &recuriveDecoder{
+			typ: rt.UnpackType(vt),
+		}
+	} else {
+		return c.compileStructBody(vt)
+	}
+}
+
+func (c *compiler) compileStructBody(vt reflect.Type) decFunc {
+	fv := resolver.ResolveStruct(vt)
+	entries := make([]fieldEntry, 0, len(fv))
+
+	for _, f := range fv {
+		var dec decFunc
+		/* dealt with field tag options */
+		if f.Opts&resolver.F_stringize != 0 {
+			dec = c.compileFieldStringOption(f.Type)
+		} else {
+			dec = c.compile(f.Type)
+		}
+
+		/* deal with embedded pointer fields */
+		if f.Path[0].Kind == resolver.F_deref {
+			dec = &embeddedFieldPtrDecoder{
+				field:    	f,
+				fieldDec:   dec,
+				fieldName:  f.Name,
+			}
+		}
+
+		entries = append(entries, fieldEntry{
+			FieldMeta: f,
+			fieldDec:  dec,
+		})
+	}
+	return &structDecoder{
+		fieldMap:  	caching.NewFieldLookup(fv),
+		fields:     entries,
+		structName: vt.Name(),
+		typ: 		vt,
+	}
+}

vendor/github.com/bytedance/sonic/internal/decoder/optdec/compiler.go

@@ -0,0 +1,449 @@
+package optdec
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+
+	"github.com/bytedance/sonic/option"
+	"github.com/bytedance/sonic/internal/rt"
+	"github.com/bytedance/sonic/internal/caching"
+)
+
+var (
+	programCache = caching.CreateProgramCache()
+)
+
+func findOrCompile(vt *rt.GoType) (decFunc, error) {
+	makeDecoder := func(vt *rt.GoType, _ ...interface{}) (interface{}, error) {
+		ret, err := newCompiler().compileType(vt.Pack())
+		return ret, err
+	}
+	if val := programCache.Get(vt); val != nil {
+		return val.(decFunc), nil
+	} else if ret, err := programCache.Compute(vt, makeDecoder); err == nil {
+		return ret.(decFunc), nil
+	} else {
+		return nil, err
+	}
+}
+
+type compiler struct {
+	visited map[reflect.Type]bool
+	depth   int
+	counts  int
+	opts 	option.CompileOptions
+	namedPtr bool
+}
+
+func newCompiler() *compiler {
+	return &compiler{
+		visited: make(map[reflect.Type]bool),
+		opts:  option.DefaultCompileOptions(),
+	}
+}
+
+func (self *compiler) apply(opts option.CompileOptions) *compiler {
+	self.opts = opts
+	return self
+}
+
+const _CompileMaxDepth = 4096
+
+func (c *compiler) enter(vt reflect.Type) {
+	c.visited[vt] = true
+	c.depth += 1
+
+	if c.depth > _CompileMaxDepth {
+		panic(*stackOverflow)
+	}
+}
+
+func (c *compiler) exit(vt reflect.Type) {
+	c.visited[vt] = false
+	c.depth -= 1
+}
+
+func (c *compiler) compileInt(vt reflect.Type) decFunc {
+	switch vt.Size() {
+	case 4:
+		switch vt.Kind() {
+		case reflect.Uint:
+			fallthrough
+		case reflect.Uintptr:
+			return &u32Decoder{}
+		case reflect.Int:
+			return &i32Decoder{}
+		}
+	case 8:
+		switch vt.Kind() {
+		case reflect.Uint:
+			fallthrough
+		case reflect.Uintptr:
+			return &u64Decoder{}
+		case reflect.Int:
+			return &i64Decoder{}
+		}
+	default:
+		panic("not supported pointer size: " + fmt.Sprint(vt.Size()))
+	}
+	panic("unreachable")
+}
+
+func (c *compiler) rescue(ep *error) {
+	if val := recover(); val != nil {
+		if err, ok := val.(error); ok {
+			*ep = err
+		} else {
+			panic(val)
+		}
+	}
+}
+
+func (c *compiler) compileType(vt reflect.Type) (rt decFunc, err error) {
+	defer c.rescue(&err)
+	rt = c.compile(vt)
+	return rt, err
+}
+
+func (c *compiler) compile(vt reflect.Type) decFunc {
+	if c.visited[vt] {
+		return &recuriveDecoder{
+			typ: rt.UnpackType(vt),
+		}
+	}
+
+	dec := c.tryCompilePtrUnmarshaler(vt, false)
+	if dec != nil {
+		return dec
+	}
+
+	return c.compileBasic(vt)
+}
+
+func (c *compiler) compileBasic(vt reflect.Type) decFunc {
+	defer func() {
+		c.counts += 1
+	}()
+	switch vt.Kind() {
+	case reflect.Bool:
+		return &boolDecoder{}
+	case reflect.Int8:
+		return &i8Decoder{}
+	case reflect.Int16:
+		return &i16Decoder{}
+	case reflect.Int32:
+		return &i32Decoder{}
+	case reflect.Int64:
+		return &i64Decoder{}
+	case reflect.Uint8:
+		return &u8Decoder{}
+	case reflect.Uint16:
+		return &u16Decoder{}
+	case reflect.Uint32:
+		return &u32Decoder{}
+	case reflect.Uint64:
+		return &u64Decoder{}
+	case reflect.Float32:
+		return &f32Decoder{}
+	case reflect.Float64:
+		return &f64Decoder{}
+	case reflect.Uint:
+		fallthrough
+	case reflect.Uintptr:
+		fallthrough
+	case reflect.Int:
+		return c.compileInt(vt)
+	case reflect.String:
+		return c.compileString(vt)
+	case reflect.Array:
+		return c.compileArray(vt)
+	case reflect.Interface:
+		return c.compileInterface(vt)
+	case reflect.Map:
+		return c.compileMap(vt)
+	case reflect.Ptr:
+		return c.compilePtr(vt)
+	case reflect.Slice:
+		return c.compileSlice(vt)
+	case reflect.Struct:
+		return c.compileStruct(vt)
+	default:
+		panic(&json.UnmarshalTypeError{Type: vt})
+	}
+}
+
+func (c *compiler) compilePtr(vt reflect.Type) decFunc {
+	c.enter(vt)
+	defer c.exit(vt)
+
+	// specail logic for Named Ptr, issue 379
+	if reflect.PtrTo(vt.Elem()) != vt {
+		c.namedPtr = true
+		return &ptrDecoder{
+			typ:   rt.UnpackType(vt.Elem()),
+			deref: c.compileBasic(vt.Elem()),
+		}
+	}
+
+	return &ptrDecoder{
+		typ:   rt.UnpackType(vt.Elem()),
+		deref: c.compile(vt.Elem()),
+	}
+}
+
+func (c *compiler) compileArray(vt reflect.Type) decFunc {
+	c.enter(vt)
+	defer c.exit(vt)
+	return &arrayDecoder{
+		len:      vt.Len(),
+		elemType: rt.UnpackType(vt.Elem()),
+		elemDec:  c.compile(vt.Elem()),
+		typ: vt,
+	}
+}
+
+func (c *compiler) compileString(vt reflect.Type) decFunc {
+	if vt == jsonNumberType {
+		return &numberDecoder{}
+	}
+	return &stringDecoder{}
+
+}
+
+func (c *compiler) tryCompileSliceUnmarshaler(vt reflect.Type) decFunc {
+	pt := reflect.PtrTo(vt.Elem())
+	if pt.Implements(jsonUnmarshalerType) {
+		return &sliceDecoder{
+			elemType: rt.UnpackType(vt.Elem()),
+			elemDec:  c.compile(vt.Elem()),
+			typ: vt,
+		}
+	}
+
+	if pt.Implements(encodingTextUnmarshalerType) {
+		return &sliceDecoder{
+			elemType: rt.UnpackType(vt.Elem()),
+			elemDec:  c.compile(vt.Elem()),
+			typ: vt,
+		}
+	}
+	return nil
+}
+
+func (c *compiler) compileSlice(vt reflect.Type) decFunc {
+	c.enter(vt)
+	defer c.exit(vt)
+
+	// Some common slice, use a decoder, to avoid function calls
+	et := rt.UnpackType(vt.Elem())
+
+	/* first checking `[]byte` */
+	if et.Kind() == reflect.Uint8 /* []byte */ {
+		return c.compileSliceBytes(vt)
+	}
+
+	dec := c.tryCompileSliceUnmarshaler(vt)
+	if dec != nil {
+		return dec
+	}
+
+	if vt == reflect.TypeOf([]interface{}{}) {
+		return &sliceEfaceDecoder{}
+	}
+	if et.IsInt32() {
+		return &sliceI32Decoder{}
+	}
+	if et.IsInt64() {
+		return &sliceI64Decoder{}
+	}
+	if et.IsUint32() {
+		return &sliceU32Decoder{}
+	}
+	if et.IsUint64() {
+		return &sliceU64Decoder{}
+	}
+	if et.Kind() == reflect.String {
+		return &sliceStringDecoder{}
+	}
+
+	return &sliceDecoder{
+		elemType: rt.UnpackType(vt.Elem()),
+		elemDec:  c.compile(vt.Elem()),
+		typ: vt,
+	}
+}
+
+func (c *compiler) compileSliceBytes(vt reflect.Type) decFunc {
+	ep := reflect.PtrTo(vt.Elem())
+
+	if ep.Implements(jsonUnmarshalerType) {
+		return &sliceBytesUnmarshalerDecoder{
+			elemType: rt.UnpackType(vt.Elem()),
+			elemDec:  c.compile(vt.Elem()),
+			typ: vt,
+		}
+	}
+
+	if ep.Implements(encodingTextUnmarshalerType) {
+		return &sliceBytesUnmarshalerDecoder{
+			elemType: rt.UnpackType(vt.Elem()),
+			elemDec:  c.compile(vt.Elem()),
+				typ: vt,
+		}
+	}
+
+	return &sliceBytesDecoder{}
+}
+
+func (c *compiler) compileInterface(vt reflect.Type) decFunc {
+	c.enter(vt)
+	defer c.exit(vt)
+	if vt.NumMethod() == 0 {
+		return &efaceDecoder{}
+	}
+
+	if vt.Implements(jsonUnmarshalerType) {
+		return &unmarshalJSONDecoder{
+			typ: rt.UnpackType(vt),
+		}
+	}
+
+	if vt.Implements(encodingTextUnmarshalerType) {
+		return &unmarshalTextDecoder{
+			typ: rt.UnpackType(vt),
+		}
+	}
+
+	return &ifaceDecoder{
+		typ: rt.UnpackType(vt),
+	}
+}
+
+func (c *compiler) compileMap(vt reflect.Type) decFunc {
+	c.enter(vt)
+	defer c.exit(vt)
+	// check the key unmarshaler at first
+	decKey := tryCompileKeyUnmarshaler(vt)
+	if decKey != nil {
+		return &mapDecoder{
+			mapType: rt.MapType(rt.UnpackType(vt)),
+			keyDec:  decKey,
+			elemDec: c.compile(vt.Elem()),
+		}
+	}
+
+	// Most common map, use a decoder, to avoid function calls
+	if vt == reflect.TypeOf(map[string]interface{}{}) {
+		return &mapEfaceDecoder{}
+	} else if vt == reflect.TypeOf(map[string]string{}) {
+		return &mapStringDecoder{}
+	}
+
+	// Some common integer map later
+	mt := rt.MapType(rt.UnpackType(vt))
+
+	if mt.Key.Kind() == reflect.String {
+		return &mapStrKeyDecoder{
+			mapType: mt,
+			assign: rt.GetMapStrAssign(vt),
+			elemDec: c.compile(vt.Elem()),
+		}
+	}
+
+	if mt.Key.IsInt64() {
+		return &mapI64KeyDecoder{
+			mapType: mt,
+			elemDec: c.compile(vt.Elem()),
+			assign: rt.GetMap64Assign(vt),
+		}
+	}
+
+	if mt.Key.IsInt32() {
+		return &mapI32KeyDecoder{
+			mapType: mt,
+			elemDec: c.compile(vt.Elem()),
+			assign: rt.GetMap32Assign(vt),
+		}
+	}
+
+	if mt.Key.IsUint64() {
+		return &mapU64KeyDecoder{
+			mapType: mt,
+			elemDec: c.compile(vt.Elem()),
+			assign: rt.GetMap64Assign(vt),
+		}
+	}
+
+	if mt.Key.IsUint32() {
+		return &mapU32KeyDecoder{
+			mapType: mt,
+			elemDec: c.compile(vt.Elem()),
+			assign: rt.GetMap32Assign(vt),
+		}
+	}
+
+	// Generic map
+	return &mapDecoder{
+		mapType: mt,
+		keyDec:  c.compileMapKey(vt),
+		elemDec: c.compile(vt.Elem()),
+	}
+}
+
+func tryCompileKeyUnmarshaler(vt reflect.Type) decKey {
+	pt := reflect.PtrTo(vt.Key())
+
+	/* check for `encoding.TextUnmarshaler` with pointer receiver */
+	if pt.Implements(encodingTextUnmarshalerType) {
+		return decodeKeyTextUnmarshaler
+	}
+
+	/* not support map key with `json.Unmarshaler` */
+	return nil
+}
+
+func (c *compiler) compileMapKey(vt reflect.Type) decKey {
+	switch vt.Key().Kind() {
+	case reflect.Int8:
+		return decodeKeyI8
+	case reflect.Int16:
+		return decodeKeyI16
+	case reflect.Uint8:
+		return decodeKeyU8
+	case reflect.Uint16:
+		return decodeKeyU16
+	default:
+		panic(&json.UnmarshalTypeError{Type: vt})
+	}
+}
+
+// maybe vt is a named type, and not a pointer receiver, see issue 379  
+func (c *compiler) tryCompilePtrUnmarshaler(vt reflect.Type, strOpt bool) decFunc {
+	pt := reflect.PtrTo(vt)
+
+	/* check for `json.Unmarshaler` with pointer receiver */
+	if pt.Implements(jsonUnmarshalerType) {
+		return &unmarshalJSONDecoder{
+			typ: rt.UnpackType(pt),
+			strOpt: strOpt,
+		}
+	}
+
+	/* check for `encoding.TextMarshaler` with pointer receiver */
+	if pt.Implements(encodingTextUnmarshalerType) {
+		/* TextUnmarshal not support ,strig tag */
+		if strOpt {
+			panicForInvalidStrType(vt)
+		}
+		return &unmarshalTextDecoder{
+			typ: rt.UnpackType(pt),
+		}
+	}
+
+	return nil
+}
+
+func panicForInvalidStrType(vt reflect.Type) {
+	panic(error_type(rt.UnpackType(vt)))
+}

vendor/github.com/bytedance/sonic/internal/decoder/optdec/const.go

@@ -0,0 +1,60 @@
+package optdec
+
+import "math"
+
+/*
+Copied from sonic-rs
+// JSON Value Type
+const NULL: u64 = 0;
+const BOOL: u64 = 2;
+const FALSE: u64 = BOOL;
+const TRUE: u64 = (1 << 3) | BOOL;
+const NUMBER: u64 = 3;
+const UINT: u64 = NUMBER;
+const SINT: u64 = (1 << 3) | NUMBER;
+const REAL: u64 = (2 << 3) | NUMBER;
+const RAWNUMBER: u64 = (3 << 3) | NUMBER;
+const STRING: u64 = 4;
+const STRING_COMMON: u64 = STRING;
+const STRING_HASESCAPED: u64 = (1 << 3) | STRING;
+const OBJECT: u64 = 6;
+const ARRAY: u64 = 7;
+
+/// JSON Type Mask
+const POS_MASK: u64 = (!0) << 32;
+const POS_BITS: u64 = 32;
+const TYPE_MASK: u64 = 0xFF;
+const TYPE_BITS: u64 = 8;
+
+*/
+
+const (
+	// BasicType: 3 bits
+	KNull   = 0 // xxxxx000
+	KBool   = 2 // xxxxx010
+	KNumber = 3 // xxxxx011
+	KString = 4 // xxxxx100
+	KRaw    = 5 // xxxxx101
+	KObject = 6 // xxxxx110
+	KArray  = 7 // xxxxx111
+
+	// SubType: 2 bits
+	KFalse            = (0 << 3) | KBool   // xxx00_010, 2
+	KTrue             = (1 << 3) | KBool   // xxx01_010, 10
+	KUint             = (0 << 3) | KNumber // xxx00_011, 3
+	KSint             = (1 << 3) | KNumber // xxx01_011, 11
+	KReal             = (2 << 3) | KNumber // xxx10_011, 19
+	KRawNumber        = (3 << 3) | KNumber // xxx11_011, 27
+	KStringCommon     = KString            // xxx00_100, 4
+	KStringEscaped = (1 << 3) | KString // xxx01_100, 12
+)
+
+const (
+	PosMask  = math.MaxUint64 << 32
+	PosBits  = 32
+	TypeMask = 0xFF
+	TypeBits = 8
+
+	ConLenMask = uint64(math.MaxUint32)
+	ConLenBits = 32
+)

vendor/github.com/bytedance/sonic/internal/decoder/optdec/context.go

@@ -0,0 +1,3 @@
+package optdec
+
+type context = Context

vendor/github.com/bytedance/sonic/internal/decoder/optdec/decoder.go

@@ -0,0 +1,160 @@
+package optdec
+
+import (
+	"reflect"
+	"unsafe"
+
+	"encoding/json"
+	"github.com/bytedance/sonic/internal/rt"
+	"github.com/bytedance/sonic/option"
+	"github.com/bytedance/sonic/internal/decoder/errors"
+	"github.com/bytedance/sonic/internal/decoder/consts"
+)
+
+
+type (
+	MismatchTypeError = errors.MismatchTypeError
+	SyntaxError = errors.SyntaxError
+)
+
+const (
+	_F_allow_control = consts.F_allow_control
+	_F_copy_string = consts.F_copy_string
+	_F_disable_unknown = consts.F_disable_unknown
+	_F_disable_urc = consts.F_disable_urc
+	_F_use_int64 = consts.F_use_int64
+	_F_use_number = consts.F_use_number
+	_F_validate_string = consts.F_validate_string
+)
+
+type Options = consts.Options
+
+const (
+	OptionUseInt64     = consts.OptionUseInt64
+	OptionUseNumber    = consts.OptionUseNumber
+	OptionUseUnicodeErrors = consts.OptionUseUnicodeErrors
+	OptionDisableUnknown = consts.OptionDisableUnknown
+	OptionCopyString = consts.OptionCopyString
+	OptionValidateString = consts.OptionValidateString
+)
+
+
+func Decode(s *string, i *int, f uint64, val interface{}) error {
+	vv := rt.UnpackEface(val)
+	vp := vv.Value
+
+	/* check for nil type */
+	if vv.Type == nil {
+		return &json.InvalidUnmarshalError{}
+	}
+
+	/* must be a non-nil pointer */
+	if vp == nil || vv.Type.Kind() != reflect.Ptr {
+		return &json.InvalidUnmarshalError{Type: vv.Type.Pack()}
+	}
+
+	etp := rt.PtrElem(vv.Type)
+
+	/* check the defined pointer type for issue 379 */
+	if vv.Type.IsNamed() {
+		newp := vp
+		etp = vv.Type
+		vp = unsafe.Pointer(&newp)
+	}
+
+	dec, err := findOrCompile(etp)
+	if err != nil {
+		return err
+	}
+
+	/* parse into document */
+	ctx, err := NewContext(*s, *i, uint64(f), etp)
+	defer ctx.Delete()
+	if ctx.Parser.Utf8Inv {
+		*s = ctx.Parser.Json
+	}
+	if err != nil {
+		goto fix_error;
+	}
+	err = dec.FromDom(vp, ctx.Root(), &ctx)
+
+fix_error:
+	err = fix_error(*s, *i, err)
+
+	// update position at last
+	*i += ctx.Parser.Pos()
+	return err
+}
+
+func fix_error(json string, pos int, err error) error {
+	if e, ok := err.(SyntaxError); ok {
+		return SyntaxError{
+			Pos: int(e.Pos) + pos,
+			Src: json,
+			Msg: e.Msg,
+		}
+	}
+
+	if e, ok := err.(MismatchTypeError); ok {
+		return &MismatchTypeError {
+			Pos: int(e.Pos) + pos,
+			Src: json,
+			Type: e.Type,
+		}
+	}
+
+	return err
+}
+
+// Pretouch compiles vt ahead-of-time to avoid JIT compilation on-the-fly, in
+// order to reduce the first-hit latency.
+//
+// Opts are the compile options, for example, "option.WithCompileRecursiveDepth" is
+// a compile option to set the depth of recursive compile for the nested struct type.
+func Pretouch(vt reflect.Type, opts ...option.CompileOption) error {
+    cfg := option.DefaultCompileOptions()
+    for _, opt := range opts {
+        opt(&cfg)
+    }
+    return pretouchRec(map[reflect.Type]bool{vt:true}, cfg)
+}
+
+func pretouchType(_vt reflect.Type, opts option.CompileOptions) (map[reflect.Type]bool, error) {
+    /* compile function */
+    compiler := newCompiler().apply(opts)
+    decoder := func(vt *rt.GoType, _ ...interface{}) (interface{}, error) {
+        if f, err := compiler.compileType(_vt); err != nil {
+            return nil, err
+        } else {
+            return f, nil
+        }
+    }
+
+    /* find or compile */
+    vt := rt.UnpackType(_vt)
+    if val := programCache.Get(vt); val != nil {
+        return nil, nil
+    } else if _, err := programCache.Compute(vt, decoder); err == nil {
+        return compiler.visited, nil
+    } else {
+        return nil, err
+    }
+}
+
+func pretouchRec(vtm map[reflect.Type]bool, opts option.CompileOptions) error {
+    if opts.RecursiveDepth < 0 || len(vtm) == 0 {
+        return nil
+    }
+    next := make(map[reflect.Type]bool)
+    for vt := range(vtm) {
+        sub, err := pretouchType(vt, opts)
+        if err != nil {
+            return err
+        }
+        for svt := range(sub) {
+            next[svt] = true
+        }
+    }
+    opts.RecursiveDepth -= 1
+    return pretouchRec(next, opts)
+}

vendor/github.com/bytedance/sonic/internal/decoder/optdec/errors.go

@@ -0,0 +1,73 @@
+/*
+ * 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 optdec
+
+ import (
+	 "encoding/json"
+	 "errors"
+	 "reflect"
+	 "strconv"
+ 
+	 "github.com/bytedance/sonic/internal/rt"
+ )
+
+ /** JIT Error Helpers **/
+ 
+ var stackOverflow = &json.UnsupportedValueError{
+	 Str:   "Value nesting too deep",
+	 Value: reflect.ValueOf("..."),
+ }
+ 
+ func error_type(vt *rt.GoType) error {
+	 return &json.UnmarshalTypeError{Type: vt.Pack()}
+ }
+ 
+ func error_mismatch(node Node, ctx *context, typ reflect.Type) error {
+	 return MismatchTypeError{
+		 Pos:  node.Position(),
+		 Src:  ctx.Parser.Json,
+		 Type: typ,
+	 }
+ }
+ 
+ func newUnmatched(pos int, vt *rt.GoType) error {
+	 return MismatchTypeError{
+		Pos:  pos,
+		Src:  "",
+		Type: vt.Pack(),
+	 }
+ }
+
+ func error_field(name string) error {
+	 return errors.New("json: unknown field " + strconv.Quote(name))
+ }
+ 
+ func error_value(value string, vtype reflect.Type) error {
+	 return &json.UnmarshalTypeError{
+		 Type:  vtype,
+		 Value: value,
+	 }
+ }
+ 
+ func error_syntax(pos int, src string, msg string) error {
+	 return SyntaxError{
+		 Pos: pos,
+		 Src: src,
+		 Msg: msg,
+	 }
+ }
+ 

vendor/github.com/bytedance/sonic/internal/decoder/optdec/functor.go

@@ -0,0 +1,281 @@
+package optdec
+
+import (
+	"encoding/json"
+	"math"
+	"unsafe"
+
+	"github.com/bytedance/sonic/internal/rt"
+	"github.com/bytedance/sonic/internal/resolver"
+)
+
+type decFunc interface {
+	FromDom(vp unsafe.Pointer, node Node, ctx *context) error
+}
+
+type ptrDecoder struct {
+	typ   *rt.GoType
+	deref decFunc
+}
+
+// Pointer Value is allocated in the Caller
+func (d *ptrDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	if *(*unsafe.Pointer)(vp) == nil {
+		*(*unsafe.Pointer)(vp) = rt.Mallocgc(d.typ.Size, d.typ, true)
+	}
+
+	return d.deref.FromDom(*(*unsafe.Pointer)(vp), node, ctx)
+}
+
+type embeddedFieldPtrDecoder struct {
+	field      resolver.FieldMeta
+	fieldDec   decFunc
+	fieldName  string
+}
+
+// Pointer Value is allocated in the Caller
+func (d *embeddedFieldPtrDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	// seek into the pointer
+	vp = unsafe.Pointer(uintptr(vp) - uintptr(d.field.Path[0].Size))
+	for _, f := range d.field.Path {
+		deref := rt.UnpackType(f.Type)
+		vp = unsafe.Pointer(uintptr(vp) + f.Size)
+		if f.Kind == resolver.F_deref {
+			if  *(*unsafe.Pointer)(vp) == nil  {
+				*(*unsafe.Pointer)(vp) = rt.Mallocgc(deref.Size, deref, true)
+			}
+			vp = *(*unsafe.Pointer)(vp)
+		}
+	}
+	return d.fieldDec.FromDom(vp, node, ctx)
+}
+
+type i8Decoder struct{}
+
+func (d *i8Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsI64(ctx)
+	if !ok ||  ret > math.MaxInt8 || ret < math.MinInt8 {
+		return error_mismatch(node, ctx, int8Type)
+	}
+
+	*(*int8)(vp) = int8(ret)
+	return nil
+}
+
+type i16Decoder struct{}
+
+func (d *i16Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsI64(ctx)
+	if !ok || ret > math.MaxInt16 || ret < math.MinInt16 {
+		return error_mismatch(node, ctx, int16Type)
+	}
+
+	*(*int16)(vp) = int16(ret)
+	return nil
+}
+
+type i32Decoder struct{}
+
+func (d *i32Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsI64(ctx)
+	if !ok ||  ret > math.MaxInt32 || ret < math.MinInt32 {
+		return error_mismatch(node, ctx, int32Type)
+	}
+
+	*(*int32)(vp) = int32(ret)
+	return nil
+}
+
+type i64Decoder struct{}
+
+func (d *i64Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsI64(ctx)
+	if !ok  {
+		return error_mismatch(node, ctx, int64Type)
+	}
+
+	*(*int64)(vp) = int64(ret)
+	return nil
+}
+
+type u8Decoder struct{}
+
+func (d *u8Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsU64(ctx)
+	if !ok || ret > math.MaxUint8 {
+		err := error_mismatch(node, ctx, uint8Type)
+		return err
+	}
+
+	*(*uint8)(vp) = uint8(ret)
+	return nil
+}
+
+type u16Decoder struct{}
+
+func (d *u16Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsU64(ctx)
+	if !ok || ret > math.MaxUint16 {
+		return error_mismatch(node, ctx, uint16Type)
+	}
+	*(*uint16)(vp) = uint16(ret)
+	return nil
+}
+
+type u32Decoder struct{}
+
+func (d *u32Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsU64(ctx)
+	if !ok || ret > math.MaxUint32 {
+		return error_mismatch(node, ctx, uint32Type)
+	}
+
+	*(*uint32)(vp) = uint32(ret)
+	return nil
+}
+
+type u64Decoder struct{}
+
+func (d *u64Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsU64(ctx)
+	if !ok {
+		return error_mismatch(node, ctx, uint64Type)
+	}
+
+	*(*uint64)(vp) = uint64(ret)
+	return nil
+}
+
+type f32Decoder struct{}
+
+func (d *f32Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsF64(ctx)
+	if !ok || ret > math.MaxFloat32 || ret < -math.MaxFloat32 {
+		return error_mismatch(node, ctx, float32Type)
+	}
+
+	*(*float32)(vp) = float32(ret)
+	return nil
+}
+
+type f64Decoder struct{}
+
+func (d *f64Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsF64(ctx)
+	if !ok {
+		return  error_mismatch(node, ctx, float64Type)
+	}
+
+	*(*float64)(vp) = float64(ret)
+	return nil
+}
+
+type boolDecoder struct {
+}
+
+func (d *boolDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsBool()
+	if !ok {
+		return error_mismatch(node, ctx, boolType)
+	}
+
+	*(*bool)(vp) = bool(ret)
+	return nil
+}
+
+type stringDecoder struct {
+}
+
+func (d *stringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	ret, ok := node.AsStr(ctx)
+	if !ok {
+		return error_mismatch(node, ctx, stringType)
+	}
+	*(*string)(vp) = ret
+	return nil
+}
+
+type numberDecoder struct {
+}
+
+func (d *numberDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	num, ok := node.AsNumber(ctx)
+	if !ok {
+		return error_mismatch(node, ctx, jsonNumberType)
+	}
+	*(*json.Number)(vp) = num
+	return nil
+}
+
+type recuriveDecoder struct {
+	typ *rt.GoType
+}
+
+func (d *recuriveDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	dec, err := findOrCompile(d.typ)
+	if err != nil {
+		return err
+	}
+	return dec.FromDom(vp, node, ctx)
+}

vendor/github.com/bytedance/sonic/internal/decoder/optdec/helper.go

@@ -0,0 +1,110 @@
+package optdec
+
+import (
+	"encoding/json"
+	"strconv"
+
+	"github.com/bytedance/sonic/internal/native"
+	"github.com/bytedance/sonic/internal/utils"
+	"github.com/bytedance/sonic/internal/native/types"
+)
+
+
+func SkipNumberFast(json string, start int) (int, bool) {
+	// find the number ending, we pasred in native, it alway valid
+	pos := start
+	for pos < len(json) && json[pos] != ']' && json[pos] != '}' && json[pos] != ',' {
+		if json[pos] >= '0' && json[pos] <= '9' || json[pos] == '.' || json[pos] == '-' || json[pos] == '+' || json[pos] == 'e' || json[pos] == 'E' {
+			pos += 1
+		} else {
+			break
+		}
+	}
+
+	// if not found number, return false
+	if pos == start {
+		return pos, false
+	}
+	return pos, true
+}
+
+
+func isSpace(c byte) bool {
+    return c == ' ' || c == '\t' || c == '\n' || c == '\r'
+}
+
+// pos is the start index of the raw
+func ValidNumberFast(raw string) bool {
+	ret := utils.SkipNumber(raw, 0)
+	if ret < 0 {
+		return false
+	}
+
+	// check trainling chars
+	for ret < len(raw) {
+		return false
+	}
+
+	return true
+}
+
+func SkipOneFast2(json string, pos *int) (int, error) {
+	// find the number ending, we pasred in sonic-cpp, it alway valid
+	start := native.SkipOneFast(&json, pos)
+	if start < 0 {
+		return -1, error_syntax(*pos, json, types.ParsingError(-start).Error())
+	}
+	return start, nil
+}
+
+func SkipOneFast(json string, pos int) (string, error) {
+	// find the number ending, we pasred in sonic-cpp, it alway valid
+	start := native.SkipOneFast(&json, &pos)
+	if start < 0 {
+		// TODO: details error code
+		return "", error_syntax(pos, json, types.ParsingError(-start).Error())
+	}
+	return json[start:pos], nil
+}
+
+func ParseI64(raw string) (int64, error) {
+	i64, err := strconv.ParseInt(raw, 10, 64)
+	if err != nil {
+		return 0, err
+	}
+	return i64, nil
+}
+
+func ParseBool(raw string) (bool, error) {
+	var b bool
+	err := json.Unmarshal([]byte(raw), &b)
+	if err != nil {
+		return false, err
+	}
+	return b, nil
+}
+
+func ParseU64(raw string) (uint64, error) {
+	u64, err := strconv.ParseUint(raw, 10, 64)
+	if err != nil {
+		return 0, err
+	}
+	return u64, nil
+}
+
+func ParseF64(raw string) (float64, error) {
+	f64, err := strconv.ParseFloat(raw, 64)
+	if err != nil {
+		return 0, err
+	}
+	return f64, nil
+}
+
+func Unquote(raw string) (string, error) {
+	var u string
+	err := json.Unmarshal([]byte(raw), &u)
+	if err != nil {
+		return "", err
+	}
+	return u, nil
+}

vendor/github.com/bytedance/sonic/internal/decoder/optdec/interface.go

@@ -0,0 +1,169 @@
+package optdec
+
+import (
+	"encoding"
+	"encoding/json"
+	"unsafe"
+	"reflect"
+
+	"github.com/bytedance/sonic/internal/rt"
+)
+
+type efaceDecoder struct {
+}
+
+func (d *efaceDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*interface{})(vp) = interface{}(nil)
+		return nil
+	}
+
+	eface := *(*rt.GoEface)(vp)
+
+	// not pointer type, or nil pointer, or *interface{}
+	if eface.Value == nil || eface.Type.Kind() != reflect.Ptr || rt.PtrElem(eface.Type) == anyType {
+		ret, err := node.AsEface(ctx)
+		if err != nil {
+			return err
+		}
+	
+		*(*interface{})(vp) = ret
+		return nil
+	}
+
+	etp := rt.PtrElem(eface.Type)
+	vp = eface.Value
+
+	/* check the defined pointer type for issue 379 */
+	if eface.Type.IsNamed() {
+		newp := vp
+		etp = eface.Type
+		vp = unsafe.Pointer(&newp)
+	}
+
+	dec, err := findOrCompile(etp)
+	if err != nil {
+		return err
+	}
+
+	return dec.FromDom(vp, node, ctx)
+}
+
+type ifaceDecoder struct {
+	typ *rt.GoType
+}
+
+func (d *ifaceDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	iface := *(*rt.GoIface)(vp)
+	if iface.Itab == nil {
+		return error_type(d.typ)
+	}
+
+	vt := iface.Itab.Vt
+
+	// not pointer type, or nil pointer, or *interface{}
+	if vp == nil || vt.Kind() != reflect.Ptr || rt.PtrElem(vt) == anyType {
+		ret, err := node.AsEface(ctx)
+		if err != nil {
+			return err
+		}
+	
+		*(*interface{})(vp) = ret
+		return nil
+	}
+
+
+	etp := rt.PtrElem(vt)
+	vp = iface.Value
+
+	/* check the defined pointer type for issue 379 */
+	if vt.IsNamed() {
+		newp := vp
+		etp = vt
+		vp = unsafe.Pointer(&newp)
+	}
+
+	dec, err := findOrCompile(etp)
+	if err != nil {
+		return err
+	}
+
+	return dec.FromDom(vp, node, ctx)
+}
+
+type unmarshalTextDecoder struct {
+	typ *rt.GoType
+}
+
+func (d *unmarshalTextDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	txt, ok := node.AsStringText(ctx)
+	if !ok {
+		return error_mismatch(node, ctx, d.typ.Pack())
+	}
+
+	v := *(*interface{})(unsafe.Pointer(&rt.GoEface{
+		Type:  d.typ,
+		Value: vp,
+	}))
+
+	// fast path
+	if u, ok :=  v.(encoding.TextUnmarshaler); ok {
+		return u.UnmarshalText(txt)
+	}
+
+	// slow path
+	rv := reflect.ValueOf(v)
+	if u, ok := rv.Interface().(encoding.TextUnmarshaler); ok {
+		return u.UnmarshalText(txt)
+	}
+
+	return error_type(d.typ)
+}
+
+type unmarshalJSONDecoder struct {
+	typ 	*rt.GoType
+	strOpt	bool
+}
+
+func (d *unmarshalJSONDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	v := *(*interface{})(unsafe.Pointer(&rt.GoEface{
+		Type: d.typ,
+		Value: vp,
+	}))
+
+	var input []byte
+	if d.strOpt && node.IsNull() {
+		input = []byte("null")
+	} else if d.strOpt {
+		s, ok := node.AsStringText(ctx)
+		if !ok {
+			return error_mismatch(node, ctx, d.typ.Pack())
+		}
+		input = s
+	} else {
+		input = []byte(node.AsRaw(ctx))
+	}
+
+	// fast path
+	if u, ok :=  v.(json.Unmarshaler); ok {
+		return u.UnmarshalJSON((input))
+	}
+
+	// slow path
+	rv := reflect.ValueOf(v)
+	if u, ok := rv.Interface().(json.Unmarshaler); ok {
+		return u.UnmarshalJSON(input)
+	}
+
+	return error_type(d.typ)
+}

vendor/github.com/bytedance/sonic/internal/decoder/optdec/map.go

@@ -0,0 +1,430 @@
+package optdec
+
+import (
+	"encoding"
+	"encoding/json"
+	"math"
+	"reflect"
+	"unsafe"
+
+	"github.com/bytedance/sonic/internal/rt"
+)
+
+/** Decoder for most common map types: map[string]interface{}, map[string]string **/
+
+type mapEfaceDecoder struct {
+}
+
+func (d *mapEfaceDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*map[string]interface{})(vp) = nil
+		return nil
+	}
+
+	return node.AsMapEface(ctx, vp)
+}
+
+type mapStringDecoder struct {
+}
+
+func (d *mapStringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*map[string]string)(vp) = nil
+		return nil
+	}
+
+	return node.AsMapString(ctx, vp)
+}
+
+/** Decoder for map with string key **/
+
+type mapStrKeyDecoder struct {
+	mapType *rt.GoMapType
+	elemDec decFunc
+	assign  rt.MapStrAssign
+	typ 	reflect.Type
+}
+
+func (d *mapStrKeyDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	obj, ok := node.AsObj()
+	if !ok {
+		return error_mismatch(node, ctx, d.mapType.Pack())
+	}
+
+	// allocate map
+	m := *(*unsafe.Pointer)(vp)
+	if m == nil {
+		m = rt.Makemap(&d.mapType.GoType, obj.Len())
+	}
+
+	var gerr error
+	next := obj.Children()
+	for i := 0; i < obj.Len(); i++ {
+		keyn := NewNode(next)
+		key, _ := keyn.AsStr(ctx)
+
+		valn := NewNode(PtrOffset(next, 1))
+		valp := d.assign(d.mapType, m, key)
+		err := d.elemDec.FromDom(valp, valn, ctx)
+		if gerr == nil && err != nil {
+			gerr = err
+		}
+		next = valn.Next()
+	}
+
+	*(*unsafe.Pointer)(vp) = m
+	return gerr
+}
+
+/** Decoder for map with int32 or int64 key **/
+
+type mapI32KeyDecoder struct {
+	mapType *rt.GoMapType
+	elemDec decFunc
+	assign rt.Map32Assign
+}
+
+func (d *mapI32KeyDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	obj, ok := node.AsObj()
+	if !ok {
+		return error_mismatch(node, ctx, d.mapType.Pack())
+	}
+
+	// allocate map
+	m := *(*unsafe.Pointer)(vp)
+	if m == nil {
+		m = rt.Makemap(&d.mapType.GoType, obj.Len())
+	}
+
+	next := obj.Children()
+	var gerr error
+	for i := 0; i < obj.Len(); i++ {
+		keyn := NewNode(next)
+		k, ok := keyn.ParseI64(ctx)
+		if !ok || k > math.MaxInt32 || k < math.MinInt32 {
+			if gerr == nil {
+				gerr = error_mismatch(keyn, ctx, d.mapType.Pack())
+			}
+			valn := NewNode(PtrOffset(next, 1))
+			next = valn.Next()
+			continue
+		}
+
+		key := int32(k)
+		ku32 := *(*uint32)(unsafe.Pointer(&key))
+		valn := NewNode(PtrOffset(next, 1))
+		valp := d.assign(d.mapType, m, ku32)
+		err := d.elemDec.FromDom(valp, valn, ctx)
+		if gerr == nil && err != nil {
+			gerr = err
+		}
+
+		next = valn.Next()
+	}
+
+	*(*unsafe.Pointer)(vp) = m
+	return gerr
+}
+
+type mapI64KeyDecoder struct {
+	mapType *rt.GoMapType
+	elemDec decFunc
+	assign rt.Map64Assign
+}
+
+func (d *mapI64KeyDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	obj, ok := node.AsObj()
+	if !ok {
+		return error_mismatch(node, ctx, d.mapType.Pack())
+	}
+
+	// allocate map
+	m := *(*unsafe.Pointer)(vp)
+	if m == nil {
+		m = rt.Makemap(&d.mapType.GoType, obj.Len())
+	}
+
+	var gerr error
+	next := obj.Children()
+	for i := 0; i < obj.Len(); i++ {
+		keyn := NewNode(next)
+		key, ok := keyn.ParseI64(ctx)
+
+		if !ok {
+			if gerr == nil {
+				gerr = error_mismatch(keyn, ctx, d.mapType.Pack())
+			}
+			valn := NewNode(PtrOffset(next, 1))
+			next = valn.Next()
+			continue
+		}
+
+		ku64 := *(*uint64)(unsafe.Pointer(&key))
+		valn := NewNode(PtrOffset(next, 1))
+		valp := d.assign(d.mapType, m, ku64)
+		err := d.elemDec.FromDom(valp, valn, ctx)
+		if gerr == nil && err != nil {
+			gerr = err
+		}
+		next = valn.Next()
+	}
+
+	*(*unsafe.Pointer)(vp) = m
+	return gerr
+}
+
+/** Decoder for map with unt32 or uint64 key **/
+
+type mapU32KeyDecoder struct {
+	mapType *rt.GoMapType
+	elemDec decFunc
+	assign  rt.Map32Assign
+}
+
+func (d *mapU32KeyDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	obj, ok := node.AsObj()
+	if !ok {
+		return error_mismatch(node, ctx, d.mapType.Pack())
+	}
+
+	// allocate map
+	m := *(*unsafe.Pointer)(vp)
+	if m == nil {
+		m = rt.Makemap(&d.mapType.GoType, obj.Len())
+	}
+
+	var gerr error
+	next := obj.Children()
+	for i := 0; i < obj.Len(); i++ {
+		keyn := NewNode(next)
+		k, ok := keyn.ParseU64(ctx)
+		if !ok || k > math.MaxUint32 {
+			if gerr == nil {
+				gerr = error_mismatch(keyn, ctx, d.mapType.Pack())
+			}
+			valn := NewNode(PtrOffset(next, 1))
+			next = valn.Next()
+			continue
+		}
+
+		key := uint32(k)
+		valn := NewNode(PtrOffset(next, 1))
+		valp := d.assign(d.mapType, m, key)
+		err := d.elemDec.FromDom(valp, valn, ctx)
+		if gerr == nil && err != nil {
+			gerr = err
+		}
+		next = valn.Next()
+	}
+
+	*(*unsafe.Pointer)(vp) = m
+	return gerr
+}
+
+type mapU64KeyDecoder struct {
+	mapType *rt.GoMapType
+	elemDec decFunc
+	assign rt.Map64Assign
+}
+
+func (d *mapU64KeyDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	obj, ok := node.AsObj()
+	if !ok {
+		return  error_mismatch(node, ctx, d.mapType.Pack())
+	}
+	// allocate map
+	m := *(*unsafe.Pointer)(vp)
+	if m == nil {
+		m = rt.Makemap(&d.mapType.GoType, obj.Len())
+	}
+
+	var gerr error
+	next := obj.Children()
+	for i := 0; i < obj.Len(); i++ {
+		keyn := NewNode(next)
+		key, ok := keyn.ParseU64(ctx)
+		if !ok {
+			if gerr == nil {
+				gerr = error_mismatch(keyn, ctx, d.mapType.Pack())
+			}
+			valn := NewNode(PtrOffset(next, 1))
+			next = valn.Next()
+			continue
+		}
+
+		valn := NewNode(PtrOffset(next, 1))
+		valp := d.assign(d.mapType, m, key)
+		err := d.elemDec.FromDom(valp, valn, ctx)
+		if gerr == nil && err != nil {
+			gerr = err
+		}
+		next = valn.Next()
+	}
+
+	*(*unsafe.Pointer)(vp) = m
+	return gerr
+}
+
+/** Decoder for generic cases */
+
+type decKey func(dec *mapDecoder, raw string, ctx *context) (interface{}, error)
+
+func decodeKeyU8(dec *mapDecoder, raw string, ctx *context) (interface{}, error) {
+	key, err := Unquote(raw)
+	if err != nil {
+		return nil, err
+	}
+	ret, err := ParseU64(key)
+	if err != nil {
+		return nil, err
+	}
+	if ret > math.MaxUint8 {
+		return nil, error_value(key, dec.mapType.Key.Pack())
+	}
+	return uint8(ret), nil
+}
+
+func decodeKeyU16(dec *mapDecoder, raw string, ctx *context) (interface{}, error) {
+	key, err := Unquote(raw)
+	if err != nil {
+		return nil, err
+	}
+	ret, err := ParseU64(key)
+	if err != nil {
+		return nil, err
+	}
+	if ret > math.MaxUint16 {
+		return nil, error_value(key, dec.mapType.Key.Pack())
+	}
+	return uint16(ret), nil
+}
+
+func decodeKeyI8(dec *mapDecoder, raw string, ctx *context) (interface{}, error) {
+	key, err := Unquote(raw)
+	if err != nil {
+		return nil, err
+	}
+	ret, err := ParseI64(key)
+	if err != nil {
+		return nil, err
+	}
+	if ret > math.MaxInt8 || ret < math.MinInt8 {
+		return nil, error_value(key, dec.mapType.Key.Pack())
+	}
+	return int8(ret), nil
+}
+
+func decodeKeyI16(dec *mapDecoder, raw string, ctx *context) (interface{}, error) {
+	key, err := Unquote(raw)
+	if err != nil {
+		return nil, err
+	}
+	ret, err := ParseI64(key)
+	if err != nil {
+		return nil, err
+	}
+	if ret > math.MaxInt16 || ret < math.MinInt16 {
+		return nil, error_value(key, dec.mapType.Key.Pack())
+	}
+	return int16(ret), nil
+}
+
+func decodeKeyJSONUnmarshaler(dec *mapDecoder, raw string, _ *context) (interface{}, error) {
+	ret := reflect.New(dec.mapType.Key.Pack()).Interface()
+	err := ret.(json.Unmarshaler).UnmarshalJSON([]byte(raw))
+	if err != nil {
+		return nil, err
+	}
+	return ret, nil
+}
+
+func decodeKeyTextUnmarshaler(dec *mapDecoder, raw string, ctx *context) (interface{}, error) {
+	key, err := Unquote(raw)
+	if err != nil {
+		return nil, err
+	}
+	ret := reflect.New(dec.mapType.Key.Pack()).Interface()
+	err = ret.(encoding.TextUnmarshaler).UnmarshalText([]byte(key))
+	if err != nil {
+		return nil, err
+	}
+	return ret, nil
+}
+
+type mapDecoder struct {
+	mapType *rt.GoMapType
+	keyDec  decKey
+	elemDec decFunc
+}
+
+func (d *mapDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	obj, ok := node.AsObj()
+	if !ok {
+		return	error_mismatch(node, ctx, d.mapType.Pack())
+	}
+
+	// allocate map
+	m := *(*unsafe.Pointer)(vp)
+	if m == nil {
+		m = rt.Makemap(&d.mapType.GoType, obj.Len())
+	}
+
+	next := obj.Children()
+	var gerr error
+	for i := 0; i < obj.Len(); i++ {
+		keyn := NewNode(next)
+		raw := keyn.AsRaw(ctx)
+		key, err := d.keyDec(d, raw, ctx)
+		if err != nil {
+			if gerr == nil {
+				gerr = error_mismatch(keyn, ctx, d.mapType.Pack())
+			}
+			valn := NewNode(PtrOffset(next, 1))
+			next = valn.Next()
+			continue
+		}
+
+		valn := NewNode(PtrOffset(next, 1))
+		keyp := rt.UnpackEface(key).Value
+		valp := rt.Mapassign(d.mapType, m, keyp)
+		err = d.elemDec.FromDom(valp, valn, ctx)
+		if gerr == nil && err != nil {
+			gerr = err
+		}
+
+		next = valn.Next()
+	}
+
+	*(*unsafe.Pointer)(vp) = m
+	return gerr
+}

vendor/github.com/bytedance/sonic/internal/decoder/optdec/native.go

@@ -0,0 +1,269 @@
+package optdec
+
+import (
+	"fmt"
+	"reflect"
+	"unsafe"
+
+	"sync"
+
+	"github.com/bytedance/sonic/internal/native"
+	"github.com/bytedance/sonic/internal/native/types"
+	"github.com/bytedance/sonic/internal/rt"
+	"github.com/bytedance/sonic/utf8"
+)
+
+
+type ErrorCode int
+
+const (
+	SONIC_OK                = 0;
+	SONIC_CONTROL_CHAR      = 1;
+	SONIC_INVALID_ESCAPED   = 2;
+	SONIC_INVALID_NUM       = 3;
+	SONIC_FLOAT_INF         = 4;
+	SONIC_EOF               = 5;
+	SONIC_INVALID_CHAR   	= 6;
+	SONIC_EXPECT_KEY        = 7;
+	SONIC_EXPECT_COLON      = 8;
+	SONIC_EXPECT_OBJ_COMMA_OR_END  = 9;
+	SONIC_EXPECT_ARR_COMMA_OR_END  = 10;
+	SONIC_VISIT_FAILED        = 11;
+	SONIC_INVALID_ESCAPED_UTF = 12;
+	SONIC_INVALID_LITERAL 	  = 13;
+	SONIC_STACK_OVERFLOW	  = 14;
+)
+
+var ParsingErrors = []string{
+    SONIC_OK                      	: "ok",
+	SONIC_CONTROL_CHAR      	  	: "control chars in string",
+	SONIC_INVALID_ESCAPED 		  	: "invalid escaped chars in string",
+	SONIC_INVALID_NUM       		: "invalid number",
+	SONIC_FLOAT_INF         		: "float infinity",
+	SONIC_EOF               		: "eof",
+	SONIC_INVALID_CHAR		  		: "invalid chars",
+	SONIC_EXPECT_KEY        		: "expect a json key",
+	SONIC_EXPECT_COLON      		: "expect a `:`",
+	SONIC_EXPECT_OBJ_COMMA_OR_END	: "expect a `,` or `}`",
+	SONIC_EXPECT_ARR_COMMA_OR_END	: "expect a `,` or `]`",
+	SONIC_VISIT_FAILED     			: "failed in json visitor",
+	SONIC_INVALID_ESCAPED_UTF		: "invalid escaped unicodes",
+	SONIC_INVALID_LITERAL			: "invalid literal(true/false/null)",
+	SONIC_STACK_OVERFLOW			: "json is exceeded max depth 4096, cause stack overflow",
+}
+
+func (code ErrorCode) Error() string {
+	return ParsingErrors[code]
+}
+
+type node struct {
+	typ uint64
+	val uint64
+}
+
+// should consitent with native/parser.c
+type _nospaceBlock struct {
+	_ [8]byte
+	_ [8]byte
+}
+
+// should consitent with native/parser.c
+type nodeBuf struct {
+	ncur    uintptr
+	parent  int64
+	depth   uint64
+	nstart  uintptr
+	nend    uintptr
+	stat    jsonStat
+}
+
+func (self *nodeBuf) init(nodes []node) {
+	self.ncur = uintptr(unsafe.Pointer(&nodes[0]))
+	self.nstart = self.ncur
+	self.nend = self.ncur + uintptr(cap(nodes)) * unsafe.Sizeof(node{})
+	self.parent = -1
+}
+
+// should consitent with native/parser.c
+type Parser struct {
+	Json    string
+	padded	[]byte
+	nodes 	[]node
+	dbuf 	[]byte
+	backup  []node
+
+	options uint64
+	// JSON cursor
+	start   uintptr
+	cur     uintptr
+	end     uintptr
+	_nbk    _nospaceBlock
+
+	// node buffer cursor
+	nbuf   	nodeBuf
+	Utf8Inv  	bool
+	isEface    bool
+}
+
+// only when parse non-empty object/array are needed.
+type jsonStat struct {
+    object 		uint32
+    array 		uint32
+    str 		uint32
+    number 		uint32
+    array_elems uint32
+    object_keys uint32
+    max_depth	uint32
+}
+
+
+var (
+	defaultJsonPaddedCap uintptr =  1 << 20  // 1 Mb
+	defaultNodesCap      uintptr =  (1 << 20) / unsafe.Sizeof(node{})  // 1 Mb
+)
+
+var parsePool sync.Pool = sync.Pool {
+	New: func () interface{} {
+		return &Parser{
+			options: 0,
+			padded: make([]byte, 0, defaultJsonPaddedCap),
+			nodes: make([]node, defaultNodesCap, defaultNodesCap),
+			dbuf: make([]byte, types.MaxDigitNums, types.MaxDigitNums),
+		}
+	},
+}
+
+var padding string = "x\"x\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+
+func newParser(data string, pos int, opt uint64) *Parser {
+	p := parsePool.Get().(*Parser)
+
+	/* validate json if needed */
+	if (opt & (1 << _F_validate_string)) != 0  && !utf8.ValidateString(data){
+		dbuf := utf8.CorrectWith(nil, rt.Str2Mem(data[pos:]), "\ufffd")
+		dbuf = append(dbuf, padding...)
+		p.Json = rt.Mem2Str(dbuf[:len(dbuf) - len(padding)])
+		p.Utf8Inv = true
+		p.start = uintptr((*rt.GoString)(unsafe.Pointer(&p.Json)).Ptr)
+	} else {
+		p.Json = data
+		// TODO: prevent too large JSON
+		p.padded = append(p.padded, data[pos:]...)
+		p.padded = append(p.padded, padding...)
+		p.start = uintptr((*rt.GoSlice)(unsafe.Pointer(&p.padded)).Ptr)
+	}
+
+	p.cur 	= p.start
+	p.end   = p.cur + uintptr(len(p.Json))
+	p.options = opt
+	p.nbuf.init(p.nodes)
+	return p
+}
+
+
+func (p *Parser) Pos() int {
+	return int(p.cur - p.start)
+}
+
+func (p *Parser) JsonBytes() []byte {
+	if p.Utf8Inv {
+		return (rt.Str2Mem(p.Json))
+	} else {
+		return p.padded
+	}
+}
+
+var nodeType = rt.UnpackType(reflect.TypeOf(node{}))
+
+//go:inline
+func calMaxNodeCap(jsonSize int) int {
+	return jsonSize / 2 + 2
+}
+
+func (p *Parser) parse() ErrorCode {
+	// when decode into struct, we should decode number as possible
+	old := p.options
+	if !p.isEface {
+		p.options &^= 1 << _F_use_number
+	}
+
+	// fast path with limited node buffer
+	err := ErrorCode(native.ParseWithPadding(unsafe.Pointer(p)))
+	if err != SONIC_VISIT_FAILED {
+		p.options = old
+		return err
+	}
+
+	// check OoB here
+	offset := p.nbuf.ncur - p.nbuf.nstart
+	curLen :=  offset / unsafe.Sizeof(node{})
+	if curLen != uintptr(len(p.nodes)) {
+		panic(fmt.Sprintf("current len: %d, real len: %d cap: %d", curLen, len(p.nodes), cap(p.nodes)))
+	}
+
+	// node buf is not enough, continue parse
+	// the maxCap is always meet all valid JSON
+	maxCap := calMaxNodeCap(len(p.Json))
+	slice := rt.GoSlice{
+		Ptr: rt.Mallocgc(uintptr(maxCap) * nodeType.Size, nodeType, false),
+		Len: maxCap,
+		Cap: maxCap,
+	}
+	rt.Memmove(unsafe.Pointer(slice.Ptr), unsafe.Pointer(&p.nodes[0]), offset)
+	p.backup = p.nodes
+	p.nodes = *(*[]node)(unsafe.Pointer(&slice))
+
+	// update node cursor
+	p.nbuf.nstart = uintptr(unsafe.Pointer(&p.nodes[0]))
+	p.nbuf.nend = p.nbuf.nstart + uintptr(cap(p.nodes)) * unsafe.Sizeof(node{})
+	p.nbuf.ncur = p.nbuf.nstart + offset
+
+	// continue parse json
+	err = ErrorCode(native.ParseWithPadding(unsafe.Pointer(p)))
+	p.options = old
+	return err
+}
+
+func (p *Parser) reset() {
+	p.options = 0
+	p.padded = p.padded[:0]
+	// nodes is too large here, we will not reset it and use small backup nodes buffer
+	if p.backup != nil {
+		p.nodes = p.backup
+		p.backup = nil
+	}
+	p.start = 0
+	p.cur = 0
+	p.end = 0
+	p.Json = ""
+	p.nbuf = nodeBuf{}
+	p._nbk = _nospaceBlock{}
+	p.Utf8Inv = false
+	p.isEface = false
+}
+
+func (p *Parser) free() {
+	p.reset()
+	parsePool.Put(p)
+}
+
+//go:noinline
+func (p *Parser) fixError(code ErrorCode) error {
+	if code == SONIC_OK {
+		return nil
+	}
+
+	if p.Pos() == 0 {
+		code = SONIC_EOF;
+	}
+
+	pos := p.Pos() - 1
+	return error_syntax(pos, p.Json, ParsingErrors[code])
+}
+
+func Parse(data string, opt uint64) error {
+	p := newParser(data, 0, opt)
+	err := p.parse()
+	p.free()
+	return err
+}

vendor/github.com/bytedance/sonic/internal/decoder/optdec/slice.go

@@ -0,0 +1,224 @@
+package optdec
+
+import (
+	"reflect"
+	"unsafe"
+
+	"github.com/bytedance/sonic/internal/rt"
+)
+
+type sliceDecoder struct {
+	elemType *rt.GoType
+	elemDec  decFunc
+	typ      reflect.Type
+}
+
+var (
+	emptyPtr = &struct{}{}
+)
+
+func (d *sliceDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*rt.GoSlice)(vp) = rt.GoSlice{}
+		return nil
+	}
+
+	arr, ok := node.AsArr()
+	if !ok {
+		return error_mismatch(node, ctx, d.typ)
+	}
+
+	slice := rt.MakeSlice(vp, d.elemType, arr.Len())
+	elems := slice.Ptr
+	next := arr.Children()
+
+	var gerr error
+	for i := 0; i < arr.Len(); i++ {
+		val := NewNode(next)
+		elem := unsafe.Pointer(uintptr(elems) + uintptr(i)*d.elemType.Size)
+		err := d.elemDec.FromDom(elem, val, ctx)
+		if gerr == nil && err != nil {
+			gerr = err
+		}
+		next = val.Next()
+	}
+
+	*(*rt.GoSlice)(vp) = *slice
+	return gerr
+}
+
+type arrayDecoder struct {
+	len      int
+	elemType *rt.GoType
+	elemDec  decFunc
+	typ   	reflect.Type
+}
+
+//go:nocheckptr
+func (d *arrayDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	arr, ok := node.AsArr()
+	if !ok {
+		return error_mismatch(node, ctx, d.typ)
+	}
+
+	next := arr.Children()
+	i := 0
+
+	var gerr error
+	for ; i < d.len && i < arr.Len(); i++ {
+		elem := unsafe.Pointer(uintptr(vp) + uintptr(i)*d.elemType.Size)
+		val := NewNode(next)
+		err := d.elemDec.FromDom(elem, val, ctx)
+		if gerr == nil && err != nil {
+			gerr = err
+		}
+		next = val.Next()
+	}
+
+	/* zero rest of array */
+	ptr := unsafe.Pointer(uintptr(vp) + uintptr(i)*d.elemType.Size)
+	n := uintptr(d.len-i) * d.elemType.Size
+	rt.ClearMemory(d.elemType, ptr, n)
+	return gerr
+}
+
+type sliceEfaceDecoder struct {
+}
+
+func (d *sliceEfaceDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*rt.GoSlice)(vp) = rt.GoSlice{}
+		return nil
+	}
+
+	return node.AsSliceEface(ctx, vp)
+}
+
+type sliceI32Decoder struct {
+}
+
+func (d *sliceI32Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*rt.GoSlice)(vp) = rt.GoSlice{}
+		return nil
+	}
+
+	return node.AsSliceI32(ctx, vp)
+}
+
+type sliceI64Decoder struct {
+}
+
+func (d *sliceI64Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*rt.GoSlice)(vp) = rt.GoSlice{}
+		return nil
+	}
+
+	return node.AsSliceI64(ctx, vp)
+}
+
+type sliceU32Decoder struct {
+}
+
+func (d *sliceU32Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*rt.GoSlice)(vp) = rt.GoSlice{}
+		return nil
+	}
+
+	return node.AsSliceU32(ctx, vp)
+}
+
+type sliceU64Decoder struct {
+}
+
+func (d *sliceU64Decoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*rt.GoSlice)(vp) = rt.GoSlice{}
+		return nil
+	}
+
+	return node.AsSliceU64(ctx, vp)
+}
+
+type sliceStringDecoder struct {
+}
+
+func (d *sliceStringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*rt.GoSlice)(vp) = rt.GoSlice{}
+		return nil
+	}
+
+	return node.AsSliceString(ctx, vp)
+}
+
+type sliceBytesDecoder struct {
+}
+
+func (d *sliceBytesDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*rt.GoSlice)(vp) = rt.GoSlice{}
+		return nil
+	}
+
+	s, err := node.AsSliceBytes(ctx)
+	if err != nil {
+		return err
+	}
+
+	*(*[]byte)(vp) = s
+	return nil
+}
+
+type sliceBytesUnmarshalerDecoder struct {
+	elemType *rt.GoType
+	elemDec  decFunc
+	typ reflect.Type
+}
+
+func (d *sliceBytesUnmarshalerDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*rt.GoSlice)(vp) = rt.GoSlice{}
+		return nil
+	}
+
+	/* parse JSON string into `[]byte` */
+	if node.IsStr() {
+		slice, err := node.AsSliceBytes(ctx)
+		if err != nil {
+			return err
+		}
+		*(*[]byte)(vp) = slice
+		return nil
+	}
+
+	/* parse JSON array into `[]byte` */
+	arr, ok := node.AsArr()
+	if !ok {
+		return error_mismatch(node, ctx, d.typ)
+	}
+
+	slice := rt.MakeSlice(vp, d.elemType, arr.Len())
+	elems := slice.Ptr
+
+	var gerr error
+	next := arr.Children()
+	for i := 0; i < arr.Len(); i++ {
+		child := NewNode(next)
+		elem := unsafe.Pointer(uintptr(elems) + uintptr(i)*d.elemType.Size)
+		err := d.elemDec.FromDom(elem, child, ctx)
+		if gerr == nil && err != nil {
+			gerr = err
+		}
+		next = child.Next()
+	}
+
+	*(*rt.GoSlice)(vp) = *slice
+	return gerr
+}

vendor/github.com/bytedance/sonic/internal/decoder/optdec/stringopts.go

@@ -0,0 +1,360 @@
+package optdec
+
+import (
+	"encoding/json"
+	"math"
+	"unsafe"
+
+	"github.com/bytedance/sonic/internal/rt"
+)
+
+type ptrStrDecoder struct {
+	typ   *rt.GoType
+	deref decFunc
+}
+
+// Pointer Value is allocated in the Caller
+func (d *ptrStrDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	s, ok := node.AsStrRef(ctx)
+	if !ok {
+		return	error_mismatch(node, ctx, stringType)
+	}
+
+	if s == "null" {
+		*(*unsafe.Pointer)(vp) = nil
+		return nil
+	}
+
+	if *(*unsafe.Pointer)(vp) == nil {
+		*(*unsafe.Pointer)(vp) = rt.Mallocgc(d.typ.Size, d.typ, true)
+	}
+
+	return d.deref.FromDom(*(*unsafe.Pointer)(vp), node, ctx)
+}
+
+type boolStringDecoder struct {
+}
+
+func (d *boolStringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	s, ok := node.AsStrRef(ctx)
+	if !ok {
+		return error_mismatch(node, ctx, stringType)
+	}
+
+	if s == "null" {
+		return nil
+	}
+
+	b, err := ParseBool(s)
+	if err != nil {
+		return error_mismatch(node, ctx, boolType)
+	}
+
+	*(*bool)(vp) = b
+	return nil
+}
+
+func parseI64(node Node, ctx *context) (int64, error, bool) {
+	if node.IsNull() {
+		return 0, nil, true
+	}
+
+	s, ok := node.AsStrRef(ctx)
+	if !ok {
+		return 0, error_mismatch(node, ctx, stringType), false
+	}
+
+	if s == "null" {
+		return 0, nil, true
+	}
+
+	ret, err := ParseI64(s)
+	return ret, err, false
+}
+
+type i8StringDecoder struct{}
+
+func (d *i8StringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	ret, err, null := parseI64(node, ctx)
+	if null {
+		return nil
+	}
+
+	if err != nil {
+		return err
+	}
+
+	if ret > math.MaxInt8 || ret < math.MinInt8 {
+		return error_mismatch(node, ctx, int8Type)
+	}
+
+	*(*int8)(vp) = int8(ret)
+	return nil
+}
+
+type i16StringDecoder struct{}
+
+func (d *i16StringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	ret, err, null := parseI64(node, ctx)
+	if null {
+		return nil
+	}
+
+	if err != nil {
+		return err
+	}
+
+	if ret > math.MaxInt16 || ret < math.MinInt16 {
+		return error_mismatch(node, ctx, int16Type)
+	}
+
+	*(*int16)(vp) = int16(ret)
+	return nil
+}
+
+type i32StringDecoder struct{}
+
+func (d *i32StringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	ret, err, null := parseI64(node, ctx)
+	if null {
+		return nil
+	}
+
+	if err != nil {
+		return err
+	}
+
+	if ret > math.MaxInt32 || ret < math.MinInt32 {
+		return error_mismatch(node, ctx, int32Type)
+	}
+
+	*(*int32)(vp) = int32(ret)
+	return nil
+}
+
+type i64StringDecoder struct{}
+
+func (d *i64StringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	ret, err, null := parseI64(node, ctx)
+	if null {
+		return nil
+	}
+
+	if err != nil {
+		return err
+	}
+
+	*(*int64)(vp) = int64(ret)
+	return nil
+}
+
+func parseU64(node Node, ctx *context) (uint64, error, bool) {
+	if node.IsNull() {
+		return 0, nil, true
+	}
+
+	s, ok := node.AsStrRef(ctx)
+	if !ok {
+		return 0, error_mismatch(node, ctx, stringType), false
+	}
+
+	if s == "null" {
+		return 0, nil, true
+	}
+
+	ret, err := ParseU64(s)
+	return 	ret, err, false
+}
+
+type u8StringDecoder struct{}
+
+func (d *u8StringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	ret, err, null := parseU64(node, ctx)
+	if null {
+		return nil
+	}
+
+	if err != nil {
+		return err
+	}
+
+	if ret > math.MaxUint8 {
+		return error_mismatch(node, ctx, uint8Type)
+	}
+
+	*(*uint8)(vp) = uint8(ret)
+	return nil
+}
+
+type u16StringDecoder struct{}
+
+func (d *u16StringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	ret, err, null := parseU64(node, ctx)
+	if null {
+		return nil
+	}
+
+	if err != nil {
+		return err
+	}
+
+	if ret > math.MaxUint16 {
+		return error_mismatch(node, ctx, uint16Type)
+	}
+
+	*(*uint16)(vp) = uint16(ret)
+	return nil
+}
+
+type u32StringDecoder struct{}
+
+func (d *u32StringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	ret, err, null := parseU64(node, ctx)
+	if null {
+		return nil
+	}
+
+	if err != nil {
+		return err
+	}
+
+	if ret > math.MaxUint32 {
+		return error_mismatch(node, ctx, uint32Type)
+	}
+
+	*(*uint32)(vp) = uint32(ret)
+	return nil
+}
+
+
+type u64StringDecoder struct{}
+
+func (d *u64StringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	ret, err, null := parseU64(node, ctx)
+	if null {
+		return nil
+	}
+
+	if err != nil {
+		return err
+	}
+
+	*(*uint64)(vp) = uint64(ret)
+	return nil
+}
+
+type f32StringDecoder struct{}
+
+func (d *f32StringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	s, ok := node.AsStrRef(ctx)
+	if !ok {
+		return error_mismatch(node, ctx, stringType)
+	}
+
+	if s == "null" {
+		return nil
+	}
+
+	ret, err := ParseF64(s)
+	if err != nil || ret > math.MaxFloat32 || ret < -math.MaxFloat32 {
+		return error_mismatch(node, ctx, float32Type)
+	}
+
+	*(*float32)(vp) = float32(ret)
+	return nil
+}
+
+type f64StringDecoder struct{}
+
+func (d *f64StringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	s, ok := node.AsStrRef(ctx)
+	if !ok {
+		return error_mismatch(node, ctx, stringType)
+	}
+
+	if s == "null" {
+		return nil
+	}
+
+	ret, err := ParseF64(s)
+	if err != nil {
+		return error_mismatch(node, ctx, float64Type)
+	}
+
+	*(*float64)(vp) = float64(ret)
+	return nil
+}
+
+/* parse string field with string options */
+type strStringDecoder struct{}
+
+func (d *strStringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	s, ok := node.AsStrRef(ctx)
+	if !ok {
+		return error_mismatch(node, ctx, stringType)
+	}
+
+	if s == "null" {
+		return nil
+	}
+
+	s, err := Unquote(s)
+	if err != nil {
+		return error_mismatch(node, ctx, stringType)
+	}
+
+	*(*string)(vp) = s
+	return nil
+}
+
+type numberStringDecoder struct{}
+
+func (d *numberStringDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	s, ok := node.AsStrRef(ctx)
+	if !ok {
+		return error_mismatch(node, ctx, stringType)
+	}
+
+	if s == "null" {
+		return nil
+	}
+
+	num, ok := node.ParseNumber(ctx)
+	if !ok {
+		return error_mismatch(node, ctx, jsonNumberType)
+	}
+
+	end, ok := SkipNumberFast(s, 0)
+	// has error or trailing chars
+	if !ok || end != len(s) {
+		return error_mismatch(node, ctx, jsonNumberType)
+	}
+
+	*(*json.Number)(vp) = json.Number(num)
+	return nil
+}

vendor/github.com/bytedance/sonic/internal/decoder/optdec/structs.go

@@ -0,0 +1,61 @@
+package optdec
+
+import (
+	"reflect"
+	"unsafe"
+
+	caching "github.com/bytedance/sonic/internal/optcaching"
+	"github.com/bytedance/sonic/internal/resolver"
+)
+
+type fieldEntry struct {
+	resolver.FieldMeta
+	fieldDec decFunc
+}
+
+type structDecoder struct {
+	fieldMap   caching.FieldLookup
+	fields     []fieldEntry
+	structName string
+	typ        reflect.Type
+}
+
+func (d *structDecoder) FromDom(vp unsafe.Pointer, node Node, ctx *context) error {
+	if node.IsNull() {
+		return nil
+	}
+
+	var gerr error
+	obj, ok := node.AsObj()
+	if !ok {
+		return error_mismatch(node, ctx, d.typ)
+	}
+
+	next := obj.Children()
+	for i := 0; i < obj.Len(); i++ {
+		key, _ := NewNode(next).AsStrRef(ctx)
+		val := NewNode(PtrOffset(next, 1))
+		next = val.Next()
+
+		// find field idx
+		idx := d.fieldMap.Get(key)
+        if idx == -1 {
+            if Options(ctx.Options())&OptionDisableUnknown != 0 {
+                return error_field(key)
+            }
+            continue
+        }
+
+		offset := d.fields[idx].Path[0].Size
+		elem := unsafe.Pointer(uintptr(vp) + offset)
+		err := d.fields[idx].fieldDec.FromDom(elem, val, ctx)
+
+		// deal with mismatch type errors
+		if gerr == nil && err != nil {
+			// TODO: better error info
+			gerr = err
+		}
+	}
+	return gerr
+}
+

vendor/github.com/bytedance/sonic/internal/decoder/optdec/types.go

@@ -0,0 +1,60 @@
+/*
+ * 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 optdec
+
+import (
+	"encoding"
+	"encoding/base64"
+	"encoding/json"
+	"reflect"
+	"unsafe"
+
+	"github.com/bytedance/sonic/internal/rt"
+)
+
+var (
+	boolType                = reflect.TypeOf(bool(false))
+	byteType                = reflect.TypeOf(byte(0))
+	intType                 = reflect.TypeOf(int(0))
+	int8Type                = reflect.TypeOf(int8(0))
+	int16Type               = reflect.TypeOf(int16(0))
+	int32Type               = reflect.TypeOf(int32(0))
+	int64Type               = reflect.TypeOf(int64(0))
+	uintType                = reflect.TypeOf(uint(0))
+	uint8Type               = reflect.TypeOf(uint8(0))
+	uint16Type              = reflect.TypeOf(uint16(0))
+	uint32Type              = reflect.TypeOf(uint32(0))
+	uint64Type              = reflect.TypeOf(uint64(0))
+	float32Type             = reflect.TypeOf(float32(0))
+	float64Type             = reflect.TypeOf(float64(0))
+	stringType              = reflect.TypeOf("")
+	bytesType               = reflect.TypeOf([]byte(nil))
+	jsonNumberType          = reflect.TypeOf(json.Number(""))
+	base64CorruptInputError = reflect.TypeOf(base64.CorruptInputError(0))
+	anyType                 = rt.UnpackType(reflect.TypeOf((*interface{})(nil)).Elem())
+)
+
+var (
+	errorType                   = reflect.TypeOf((*error)(nil)).Elem()
+	jsonUnmarshalerType         = reflect.TypeOf((*json.Unmarshaler)(nil)).Elem()
+	encodingTextUnmarshalerType = reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem()
+)
+
+func rtype(t reflect.Type) (*rt.GoItab, *rt.GoType) {
+	p := (*rt.GoIface)(unsafe.Pointer(&t))
+	return p.Itab, (*rt.GoType)(p.Value)
+}