mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-04 14:46:57 -05:00
459 lines
12 KiB
Go
Vendored
459 lines
12 KiB
Go
Vendored
package decoder
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding"
|
|
"encoding/json"
|
|
"reflect"
|
|
"unsafe"
|
|
|
|
"github.com/goccy/go-json/internal/errors"
|
|
"github.com/goccy/go-json/internal/runtime"
|
|
)
|
|
|
|
type interfaceDecoder struct {
|
|
typ *runtime.Type
|
|
structName string
|
|
fieldName string
|
|
sliceDecoder *sliceDecoder
|
|
mapDecoder *mapDecoder
|
|
floatDecoder *floatDecoder
|
|
numberDecoder *numberDecoder
|
|
stringDecoder *stringDecoder
|
|
}
|
|
|
|
func newEmptyInterfaceDecoder(structName, fieldName string) *interfaceDecoder {
|
|
ifaceDecoder := &interfaceDecoder{
|
|
typ: emptyInterfaceType,
|
|
structName: structName,
|
|
fieldName: fieldName,
|
|
floatDecoder: newFloatDecoder(structName, fieldName, func(p unsafe.Pointer, v float64) {
|
|
*(*interface{})(p) = v
|
|
}),
|
|
numberDecoder: newNumberDecoder(structName, fieldName, func(p unsafe.Pointer, v json.Number) {
|
|
*(*interface{})(p) = v
|
|
}),
|
|
stringDecoder: newStringDecoder(structName, fieldName),
|
|
}
|
|
ifaceDecoder.sliceDecoder = newSliceDecoder(
|
|
ifaceDecoder,
|
|
emptyInterfaceType,
|
|
emptyInterfaceType.Size(),
|
|
structName, fieldName,
|
|
)
|
|
ifaceDecoder.mapDecoder = newMapDecoder(
|
|
interfaceMapType,
|
|
stringType,
|
|
ifaceDecoder.stringDecoder,
|
|
interfaceMapType.Elem(),
|
|
ifaceDecoder,
|
|
structName,
|
|
fieldName,
|
|
)
|
|
return ifaceDecoder
|
|
}
|
|
|
|
func newInterfaceDecoder(typ *runtime.Type, structName, fieldName string) *interfaceDecoder {
|
|
emptyIfaceDecoder := newEmptyInterfaceDecoder(structName, fieldName)
|
|
stringDecoder := newStringDecoder(structName, fieldName)
|
|
return &interfaceDecoder{
|
|
typ: typ,
|
|
structName: structName,
|
|
fieldName: fieldName,
|
|
sliceDecoder: newSliceDecoder(
|
|
emptyIfaceDecoder,
|
|
emptyInterfaceType,
|
|
emptyInterfaceType.Size(),
|
|
structName, fieldName,
|
|
),
|
|
mapDecoder: newMapDecoder(
|
|
interfaceMapType,
|
|
stringType,
|
|
stringDecoder,
|
|
interfaceMapType.Elem(),
|
|
emptyIfaceDecoder,
|
|
structName,
|
|
fieldName,
|
|
),
|
|
floatDecoder: newFloatDecoder(structName, fieldName, func(p unsafe.Pointer, v float64) {
|
|
*(*interface{})(p) = v
|
|
}),
|
|
numberDecoder: newNumberDecoder(structName, fieldName, func(p unsafe.Pointer, v json.Number) {
|
|
*(*interface{})(p) = v
|
|
}),
|
|
stringDecoder: stringDecoder,
|
|
}
|
|
}
|
|
|
|
func (d *interfaceDecoder) numDecoder(s *Stream) Decoder {
|
|
if s.UseNumber {
|
|
return d.numberDecoder
|
|
}
|
|
return d.floatDecoder
|
|
}
|
|
|
|
var (
|
|
emptyInterfaceType = runtime.Type2RType(reflect.TypeOf((*interface{})(nil)).Elem())
|
|
interfaceMapType = runtime.Type2RType(
|
|
reflect.TypeOf((*map[string]interface{})(nil)).Elem(),
|
|
)
|
|
stringType = runtime.Type2RType(
|
|
reflect.TypeOf(""),
|
|
)
|
|
)
|
|
|
|
func decodeStreamUnmarshaler(s *Stream, depth int64, unmarshaler json.Unmarshaler) error {
|
|
start := s.cursor
|
|
if err := s.skipValue(depth); err != nil {
|
|
return err
|
|
}
|
|
src := s.buf[start:s.cursor]
|
|
dst := make([]byte, len(src))
|
|
copy(dst, src)
|
|
|
|
if err := unmarshaler.UnmarshalJSON(dst); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func decodeStreamUnmarshalerContext(s *Stream, depth int64, unmarshaler unmarshalerContext) error {
|
|
start := s.cursor
|
|
if err := s.skipValue(depth); err != nil {
|
|
return err
|
|
}
|
|
src := s.buf[start:s.cursor]
|
|
dst := make([]byte, len(src))
|
|
copy(dst, src)
|
|
|
|
if err := unmarshaler.UnmarshalJSON(s.Option.Context, dst); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func decodeUnmarshaler(buf []byte, cursor, depth int64, unmarshaler json.Unmarshaler) (int64, error) {
|
|
cursor = skipWhiteSpace(buf, cursor)
|
|
start := cursor
|
|
end, err := skipValue(buf, cursor, depth)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
src := buf[start:end]
|
|
dst := make([]byte, len(src))
|
|
copy(dst, src)
|
|
|
|
if err := unmarshaler.UnmarshalJSON(dst); err != nil {
|
|
return 0, err
|
|
}
|
|
return end, nil
|
|
}
|
|
|
|
func decodeUnmarshalerContext(ctx *RuntimeContext, buf []byte, cursor, depth int64, unmarshaler unmarshalerContext) (int64, error) {
|
|
cursor = skipWhiteSpace(buf, cursor)
|
|
start := cursor
|
|
end, err := skipValue(buf, cursor, depth)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
src := buf[start:end]
|
|
dst := make([]byte, len(src))
|
|
copy(dst, src)
|
|
|
|
if err := unmarshaler.UnmarshalJSON(ctx.Option.Context, dst); err != nil {
|
|
return 0, err
|
|
}
|
|
return end, nil
|
|
}
|
|
|
|
func decodeStreamTextUnmarshaler(s *Stream, depth int64, unmarshaler encoding.TextUnmarshaler, p unsafe.Pointer) error {
|
|
start := s.cursor
|
|
if err := s.skipValue(depth); err != nil {
|
|
return err
|
|
}
|
|
src := s.buf[start:s.cursor]
|
|
if bytes.Equal(src, nullbytes) {
|
|
*(*unsafe.Pointer)(p) = nil
|
|
return nil
|
|
}
|
|
|
|
dst := make([]byte, len(src))
|
|
copy(dst, src)
|
|
|
|
if err := unmarshaler.UnmarshalText(dst); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func decodeTextUnmarshaler(buf []byte, cursor, depth int64, unmarshaler encoding.TextUnmarshaler, p unsafe.Pointer) (int64, error) {
|
|
cursor = skipWhiteSpace(buf, cursor)
|
|
start := cursor
|
|
end, err := skipValue(buf, cursor, depth)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
src := buf[start:end]
|
|
if bytes.Equal(src, nullbytes) {
|
|
*(*unsafe.Pointer)(p) = nil
|
|
return end, nil
|
|
}
|
|
if s, ok := unquoteBytes(src); ok {
|
|
src = s
|
|
}
|
|
if err := unmarshaler.UnmarshalText(src); err != nil {
|
|
return 0, err
|
|
}
|
|
return end, nil
|
|
}
|
|
|
|
func (d *interfaceDecoder) decodeStreamEmptyInterface(s *Stream, depth int64, p unsafe.Pointer) error {
|
|
c := s.skipWhiteSpace()
|
|
for {
|
|
switch c {
|
|
case '{':
|
|
var v map[string]interface{}
|
|
ptr := unsafe.Pointer(&v)
|
|
if err := d.mapDecoder.DecodeStream(s, depth, ptr); err != nil {
|
|
return err
|
|
}
|
|
*(*interface{})(p) = v
|
|
return nil
|
|
case '[':
|
|
var v []interface{}
|
|
ptr := unsafe.Pointer(&v)
|
|
if err := d.sliceDecoder.DecodeStream(s, depth, ptr); err != nil {
|
|
return err
|
|
}
|
|
*(*interface{})(p) = v
|
|
return nil
|
|
case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
|
|
return d.numDecoder(s).DecodeStream(s, depth, p)
|
|
case '"':
|
|
s.cursor++
|
|
start := s.cursor
|
|
for {
|
|
switch s.char() {
|
|
case '\\':
|
|
if _, err := decodeEscapeString(s, nil); err != nil {
|
|
return err
|
|
}
|
|
case '"':
|
|
literal := s.buf[start:s.cursor]
|
|
s.cursor++
|
|
*(*interface{})(p) = string(literal)
|
|
return nil
|
|
case nul:
|
|
if s.read() {
|
|
continue
|
|
}
|
|
return errors.ErrUnexpectedEndOfJSON("string", s.totalOffset())
|
|
}
|
|
s.cursor++
|
|
}
|
|
case 't':
|
|
if err := trueBytes(s); err != nil {
|
|
return err
|
|
}
|
|
**(**interface{})(unsafe.Pointer(&p)) = true
|
|
return nil
|
|
case 'f':
|
|
if err := falseBytes(s); err != nil {
|
|
return err
|
|
}
|
|
**(**interface{})(unsafe.Pointer(&p)) = false
|
|
return nil
|
|
case 'n':
|
|
if err := nullBytes(s); err != nil {
|
|
return err
|
|
}
|
|
*(*interface{})(p) = nil
|
|
return nil
|
|
case nul:
|
|
if s.read() {
|
|
c = s.char()
|
|
continue
|
|
}
|
|
}
|
|
break
|
|
}
|
|
return errors.ErrNotAtBeginningOfValue(s.totalOffset())
|
|
}
|
|
|
|
type emptyInterface struct {
|
|
typ *runtime.Type
|
|
ptr unsafe.Pointer
|
|
}
|
|
|
|
func (d *interfaceDecoder) DecodeStream(s *Stream, depth int64, p unsafe.Pointer) error {
|
|
runtimeInterfaceValue := *(*interface{})(unsafe.Pointer(&emptyInterface{
|
|
typ: d.typ,
|
|
ptr: p,
|
|
}))
|
|
rv := reflect.ValueOf(runtimeInterfaceValue)
|
|
if rv.NumMethod() > 0 && rv.CanInterface() {
|
|
if u, ok := rv.Interface().(unmarshalerContext); ok {
|
|
return decodeStreamUnmarshalerContext(s, depth, u)
|
|
}
|
|
if u, ok := rv.Interface().(json.Unmarshaler); ok {
|
|
return decodeStreamUnmarshaler(s, depth, u)
|
|
}
|
|
if u, ok := rv.Interface().(encoding.TextUnmarshaler); ok {
|
|
return decodeStreamTextUnmarshaler(s, depth, u, p)
|
|
}
|
|
if s.skipWhiteSpace() == 'n' {
|
|
if err := nullBytes(s); err != nil {
|
|
return err
|
|
}
|
|
*(*interface{})(p) = nil
|
|
return nil
|
|
}
|
|
return d.errUnmarshalType(rv.Type(), s.totalOffset())
|
|
}
|
|
iface := rv.Interface()
|
|
ifaceHeader := (*emptyInterface)(unsafe.Pointer(&iface))
|
|
typ := ifaceHeader.typ
|
|
if ifaceHeader.ptr == nil || d.typ == typ || typ == nil {
|
|
// concrete type is empty interface
|
|
return d.decodeStreamEmptyInterface(s, depth, p)
|
|
}
|
|
if typ.Kind() == reflect.Ptr && typ.Elem() == d.typ || typ.Kind() != reflect.Ptr {
|
|
return d.decodeStreamEmptyInterface(s, depth, p)
|
|
}
|
|
if s.skipWhiteSpace() == 'n' {
|
|
if err := nullBytes(s); err != nil {
|
|
return err
|
|
}
|
|
*(*interface{})(p) = nil
|
|
return nil
|
|
}
|
|
decoder, err := CompileToGetDecoder(typ)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return decoder.DecodeStream(s, depth, ifaceHeader.ptr)
|
|
}
|
|
|
|
func (d *interfaceDecoder) errUnmarshalType(typ reflect.Type, offset int64) *errors.UnmarshalTypeError {
|
|
return &errors.UnmarshalTypeError{
|
|
Value: typ.String(),
|
|
Type: typ,
|
|
Offset: offset,
|
|
Struct: d.structName,
|
|
Field: d.fieldName,
|
|
}
|
|
}
|
|
|
|
func (d *interfaceDecoder) Decode(ctx *RuntimeContext, cursor, depth int64, p unsafe.Pointer) (int64, error) {
|
|
buf := ctx.Buf
|
|
runtimeInterfaceValue := *(*interface{})(unsafe.Pointer(&emptyInterface{
|
|
typ: d.typ,
|
|
ptr: p,
|
|
}))
|
|
rv := reflect.ValueOf(runtimeInterfaceValue)
|
|
if rv.NumMethod() > 0 && rv.CanInterface() {
|
|
if u, ok := rv.Interface().(unmarshalerContext); ok {
|
|
return decodeUnmarshalerContext(ctx, buf, cursor, depth, u)
|
|
}
|
|
if u, ok := rv.Interface().(json.Unmarshaler); ok {
|
|
return decodeUnmarshaler(buf, cursor, depth, u)
|
|
}
|
|
if u, ok := rv.Interface().(encoding.TextUnmarshaler); ok {
|
|
return decodeTextUnmarshaler(buf, cursor, depth, u, p)
|
|
}
|
|
cursor = skipWhiteSpace(buf, cursor)
|
|
if buf[cursor] == 'n' {
|
|
if err := validateNull(buf, cursor); err != nil {
|
|
return 0, err
|
|
}
|
|
cursor += 4
|
|
**(**interface{})(unsafe.Pointer(&p)) = nil
|
|
return cursor, nil
|
|
}
|
|
return 0, d.errUnmarshalType(rv.Type(), cursor)
|
|
}
|
|
|
|
iface := rv.Interface()
|
|
ifaceHeader := (*emptyInterface)(unsafe.Pointer(&iface))
|
|
typ := ifaceHeader.typ
|
|
if ifaceHeader.ptr == nil || d.typ == typ || typ == nil {
|
|
// concrete type is empty interface
|
|
return d.decodeEmptyInterface(ctx, cursor, depth, p)
|
|
}
|
|
if typ.Kind() == reflect.Ptr && typ.Elem() == d.typ || typ.Kind() != reflect.Ptr {
|
|
return d.decodeEmptyInterface(ctx, cursor, depth, p)
|
|
}
|
|
cursor = skipWhiteSpace(buf, cursor)
|
|
if buf[cursor] == 'n' {
|
|
if err := validateNull(buf, cursor); err != nil {
|
|
return 0, err
|
|
}
|
|
cursor += 4
|
|
**(**interface{})(unsafe.Pointer(&p)) = nil
|
|
return cursor, nil
|
|
}
|
|
decoder, err := CompileToGetDecoder(typ)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return decoder.Decode(ctx, cursor, depth, ifaceHeader.ptr)
|
|
}
|
|
|
|
func (d *interfaceDecoder) decodeEmptyInterface(ctx *RuntimeContext, cursor, depth int64, p unsafe.Pointer) (int64, error) {
|
|
buf := ctx.Buf
|
|
cursor = skipWhiteSpace(buf, cursor)
|
|
switch buf[cursor] {
|
|
case '{':
|
|
var v map[string]interface{}
|
|
ptr := unsafe.Pointer(&v)
|
|
cursor, err := d.mapDecoder.Decode(ctx, cursor, depth, ptr)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
**(**interface{})(unsafe.Pointer(&p)) = v
|
|
return cursor, nil
|
|
case '[':
|
|
var v []interface{}
|
|
ptr := unsafe.Pointer(&v)
|
|
cursor, err := d.sliceDecoder.Decode(ctx, cursor, depth, ptr)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
**(**interface{})(unsafe.Pointer(&p)) = v
|
|
return cursor, nil
|
|
case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
|
|
return d.floatDecoder.Decode(ctx, cursor, depth, p)
|
|
case '"':
|
|
var v string
|
|
ptr := unsafe.Pointer(&v)
|
|
cursor, err := d.stringDecoder.Decode(ctx, cursor, depth, ptr)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
**(**interface{})(unsafe.Pointer(&p)) = v
|
|
return cursor, nil
|
|
case 't':
|
|
if err := validateTrue(buf, cursor); err != nil {
|
|
return 0, err
|
|
}
|
|
cursor += 4
|
|
**(**interface{})(unsafe.Pointer(&p)) = true
|
|
return cursor, nil
|
|
case 'f':
|
|
if err := validateFalse(buf, cursor); err != nil {
|
|
return 0, err
|
|
}
|
|
cursor += 5
|
|
**(**interface{})(unsafe.Pointer(&p)) = false
|
|
return cursor, nil
|
|
case 'n':
|
|
if err := validateNull(buf, cursor); err != nil {
|
|
return 0, err
|
|
}
|
|
cursor += 4
|
|
**(**interface{})(unsafe.Pointer(&p)) = nil
|
|
return cursor, nil
|
|
}
|
|
return cursor, errors.ErrNotAtBeginningOfValue(cursor)
|
|
}
|