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package jsoniter
import (
"fmt"
"github.com/modern-go/reflect2"
"io"
"reflect"
"sort"
"unsafe"
)
func decoderOfMap(ctx *ctx, typ reflect2.Type) ValDecoder {
mapType := typ.(*reflect2.UnsafeMapType)
keyDecoder := decoderOfMapKey(ctx.append("[mapKey]"), mapType.Key())
elemDecoder := decoderOfType(ctx.append("[mapElem]"), mapType.Elem())
return &mapDecoder{
mapType: mapType,
keyType: mapType.Key(),
elemType: mapType.Elem(),
keyDecoder: keyDecoder,
elemDecoder: elemDecoder,
}
}
func encoderOfMap(ctx *ctx, typ reflect2.Type) ValEncoder {
mapType := typ.(*reflect2.UnsafeMapType)
if ctx.sortMapKeys {
return &sortKeysMapEncoder{
mapType: mapType,
keyEncoder: encoderOfMapKey(ctx.append("[mapKey]"), mapType.Key()),
elemEncoder: encoderOfType(ctx.append("[mapElem]"), mapType.Elem()),
}
}
return &mapEncoder{
mapType: mapType,
keyEncoder: encoderOfMapKey(ctx.append("[mapKey]"), mapType.Key()),
elemEncoder: encoderOfType(ctx.append("[mapElem]"), mapType.Elem()),
}
}
func decoderOfMapKey(ctx *ctx, typ reflect2.Type) ValDecoder {
decoder := ctx.decoderExtension.CreateMapKeyDecoder(typ)
if decoder != nil {
return decoder
}
for _, extension := range ctx.extraExtensions {
decoder := extension.CreateMapKeyDecoder(typ)
if decoder != nil {
return decoder
}
}
switch typ.Kind() {
case reflect.String:
return decoderOfType(ctx, reflect2.DefaultTypeOfKind(reflect.String))
case reflect.Bool,
reflect.Uint8, reflect.Int8,
reflect.Uint16, reflect.Int16,
reflect.Uint32, reflect.Int32,
reflect.Uint64, reflect.Int64,
reflect.Uint, reflect.Int,
reflect.Float32, reflect.Float64,
reflect.Uintptr:
typ = reflect2.DefaultTypeOfKind(typ.Kind())
return &numericMapKeyDecoder{decoderOfType(ctx, typ)}
default:
ptrType := reflect2.PtrTo(typ)
if ptrType.Implements(textMarshalerType) {
return &referenceDecoder{
&textUnmarshalerDecoder{
valType: ptrType,
},
}
}
if typ.Implements(textMarshalerType) {
return &textUnmarshalerDecoder{
valType: typ,
}
}
return &lazyErrorDecoder{err: fmt.Errorf("unsupported map key type: %v", typ)}
}
}
func encoderOfMapKey(ctx *ctx, typ reflect2.Type) ValEncoder {
encoder := ctx.encoderExtension.CreateMapKeyEncoder(typ)
if encoder != nil {
return encoder
}
for _, extension := range ctx.extraExtensions {
encoder := extension.CreateMapKeyEncoder(typ)
if encoder != nil {
return encoder
}
}
switch typ.Kind() {
case reflect.String:
return encoderOfType(ctx, reflect2.DefaultTypeOfKind(reflect.String))
case reflect.Bool,
reflect.Uint8, reflect.Int8,
reflect.Uint16, reflect.Int16,
reflect.Uint32, reflect.Int32,
reflect.Uint64, reflect.Int64,
reflect.Uint, reflect.Int,
reflect.Float32, reflect.Float64,
reflect.Uintptr:
typ = reflect2.DefaultTypeOfKind(typ.Kind())
return &numericMapKeyEncoder{encoderOfType(ctx, typ)}
default:
if typ == textMarshalerType {
return &directTextMarshalerEncoder{
stringEncoder: ctx.EncoderOf(reflect2.TypeOf("")),
}
}
if typ.Implements(textMarshalerType) {
return &textMarshalerEncoder{
valType: typ,
stringEncoder: ctx.EncoderOf(reflect2.TypeOf("")),
}
}
if typ.Kind() == reflect.Interface {
return &dynamicMapKeyEncoder{ctx, typ}
}
return &lazyErrorEncoder{err: fmt.Errorf("unsupported map key type: %v", typ)}
}
}
type mapDecoder struct {
mapType *reflect2.UnsafeMapType
keyType reflect2.Type
elemType reflect2.Type
keyDecoder ValDecoder
elemDecoder ValDecoder
}
func (decoder *mapDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
mapType := decoder.mapType
c := iter.nextToken()
if c == 'n' {
iter.skipThreeBytes('u', 'l', 'l')
*(*unsafe.Pointer)(ptr) = nil
mapType.UnsafeSet(ptr, mapType.UnsafeNew())
return
}
if mapType.UnsafeIsNil(ptr) {
mapType.UnsafeSet(ptr, mapType.UnsafeMakeMap(0))
}
if c != '{' {
iter.ReportError("ReadMapCB", `expect { or n, but found `+string([]byte{c}))
return
}
c = iter.nextToken()
if c == '}' {
return
}
if c != '"' {
iter.ReportError("ReadMapCB", `expect " after }, but found `+string([]byte{c}))
return
}
iter.unreadByte()
key := decoder.keyType.UnsafeNew()
decoder.keyDecoder.Decode(key, iter)
c = iter.nextToken()
if c != ':' {
iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
return
}
elem := decoder.elemType.UnsafeNew()
decoder.elemDecoder.Decode(elem, iter)
decoder.mapType.UnsafeSetIndex(ptr, key, elem)
for c = iter.nextToken(); c == ','; c = iter.nextToken() {
key := decoder.keyType.UnsafeNew()
decoder.keyDecoder.Decode(key, iter)
c = iter.nextToken()
if c != ':' {
iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
return
}
elem := decoder.elemType.UnsafeNew()
decoder.elemDecoder.Decode(elem, iter)
decoder.mapType.UnsafeSetIndex(ptr, key, elem)
}
if c != '}' {
iter.ReportError("ReadMapCB", `expect }, but found `+string([]byte{c}))
}
}
type numericMapKeyDecoder struct {
decoder ValDecoder
}
func (decoder *numericMapKeyDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
c := iter.nextToken()
if c != '"' {
iter.ReportError("ReadMapCB", `expect ", but found `+string([]byte{c}))
return
}
decoder.decoder.Decode(ptr, iter)
c = iter.nextToken()
if c != '"' {
iter.ReportError("ReadMapCB", `expect ", but found `+string([]byte{c}))
return
}
}
type numericMapKeyEncoder struct {
encoder ValEncoder
}
func (encoder *numericMapKeyEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
stream.writeByte('"')
encoder.encoder.Encode(ptr, stream)
stream.writeByte('"')
}
func (encoder *numericMapKeyEncoder) IsEmpty(ptr unsafe.Pointer) bool {
return false
}
type dynamicMapKeyEncoder struct {
ctx *ctx
valType reflect2.Type
}
func (encoder *dynamicMapKeyEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
obj := encoder.valType.UnsafeIndirect(ptr)
encoderOfMapKey(encoder.ctx, reflect2.TypeOf(obj)).Encode(reflect2.PtrOf(obj), stream)
}
func (encoder *dynamicMapKeyEncoder) IsEmpty(ptr unsafe.Pointer) bool {
obj := encoder.valType.UnsafeIndirect(ptr)
return encoderOfMapKey(encoder.ctx, reflect2.TypeOf(obj)).IsEmpty(reflect2.PtrOf(obj))
}
type mapEncoder struct {
mapType *reflect2.UnsafeMapType
keyEncoder ValEncoder
elemEncoder ValEncoder
}
func (encoder *mapEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
stream.WriteObjectStart()
iter := encoder.mapType.UnsafeIterate(ptr)
for i := 0; iter.HasNext(); i++ {
if i != 0 {
stream.WriteMore()
}
key, elem := iter.UnsafeNext()
encoder.keyEncoder.Encode(key, stream)
if stream.indention > 0 {
stream.writeTwoBytes(byte(':'), byte(' '))
} else {
stream.writeByte(':')
}
encoder.elemEncoder.Encode(elem, stream)
}
stream.WriteObjectEnd()
}
func (encoder *mapEncoder) IsEmpty(ptr unsafe.Pointer) bool {
iter := encoder.mapType.UnsafeIterate(ptr)
return !iter.HasNext()
}
type sortKeysMapEncoder struct {
mapType *reflect2.UnsafeMapType
keyEncoder ValEncoder
elemEncoder ValEncoder
}
func (encoder *sortKeysMapEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
if *(*unsafe.Pointer)(ptr) == nil {
stream.WriteNil()
return
}
stream.WriteObjectStart()
mapIter := encoder.mapType.UnsafeIterate(ptr)
subStream := stream.cfg.BorrowStream(nil)
subIter := stream.cfg.BorrowIterator(nil)
keyValues := encodedKeyValues{}
for mapIter.HasNext() {
subStream.buf = make([]byte, 0, 64)
key, elem := mapIter.UnsafeNext()
encoder.keyEncoder.Encode(key, subStream)
if subStream.Error != nil && subStream.Error != io.EOF && stream.Error == nil {
stream.Error = subStream.Error
}
encodedKey := subStream.Buffer()
subIter.ResetBytes(encodedKey)
decodedKey := subIter.ReadString()
if stream.indention > 0 {
subStream.writeTwoBytes(byte(':'), byte(' '))
} else {
subStream.writeByte(':')
}
encoder.elemEncoder.Encode(elem, subStream)
keyValues = append(keyValues, encodedKV{
key: decodedKey,
keyValue: subStream.Buffer(),
})
}
sort.Sort(keyValues)
for i, keyValue := range keyValues {
if i != 0 {
stream.WriteMore()
}
stream.Write(keyValue.keyValue)
}
stream.WriteObjectEnd()
stream.cfg.ReturnStream(subStream)
stream.cfg.ReturnIterator(subIter)
}
func (encoder *sortKeysMapEncoder) IsEmpty(ptr unsafe.Pointer) bool {
iter := encoder.mapType.UnsafeIterate(ptr)
return !iter.HasNext()
}
type encodedKeyValues []encodedKV
type encodedKV struct {
key string
keyValue []byte
}
func (sv encodedKeyValues) Len() int { return len(sv) }
func (sv encodedKeyValues) Swap(i, j int) { sv[i], sv[j] = sv[j], sv[i] }
func (sv encodedKeyValues) Less(i, j int) bool { return sv[i].key < sv[j].key }
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