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