5 "github.com/modern-go/reflect2"
10 func decoderOfSlice(ctx *ctx, typ reflect2.Type) ValDecoder {
11 sliceType := typ.(*reflect2.UnsafeSliceType)
12 decoder := decoderOfType(ctx.append("[sliceElem]"), sliceType.Elem())
13 return &sliceDecoder{sliceType, decoder}
16 func encoderOfSlice(ctx *ctx, typ reflect2.Type) ValEncoder {
17 sliceType := typ.(*reflect2.UnsafeSliceType)
18 encoder := encoderOfType(ctx.append("[sliceElem]"), sliceType.Elem())
19 return &sliceEncoder{sliceType, encoder}
22 type sliceEncoder struct {
23 sliceType *reflect2.UnsafeSliceType
24 elemEncoder ValEncoder
27 func (encoder *sliceEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
28 if encoder.sliceType.UnsafeIsNil(ptr) {
32 length := encoder.sliceType.UnsafeLengthOf(ptr)
34 stream.WriteEmptyArray()
37 stream.WriteArrayStart()
38 encoder.elemEncoder.Encode(encoder.sliceType.UnsafeGetIndex(ptr, 0), stream)
39 for i := 1; i < length; i++ {
41 elemPtr := encoder.sliceType.UnsafeGetIndex(ptr, i)
42 encoder.elemEncoder.Encode(elemPtr, stream)
44 stream.WriteArrayEnd()
45 if stream.Error != nil && stream.Error != io.EOF {
46 stream.Error = fmt.Errorf("%v: %s", encoder.sliceType, stream.Error.Error())
50 func (encoder *sliceEncoder) IsEmpty(ptr unsafe.Pointer) bool {
51 return encoder.sliceType.UnsafeLengthOf(ptr) == 0
54 type sliceDecoder struct {
55 sliceType *reflect2.UnsafeSliceType
56 elemDecoder ValDecoder
59 func (decoder *sliceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
60 decoder.doDecode(ptr, iter)
61 if iter.Error != nil && iter.Error != io.EOF {
62 iter.Error = fmt.Errorf("%v: %s", decoder.sliceType, iter.Error.Error())
66 func (decoder *sliceDecoder) doDecode(ptr unsafe.Pointer, iter *Iterator) {
68 sliceType := decoder.sliceType
70 iter.skipThreeBytes('u', 'l', 'l')
71 sliceType.UnsafeSetNil(ptr)
75 iter.ReportError("decode slice", "expect [ or n, but found "+string([]byte{c}))
80 sliceType.UnsafeSet(ptr, sliceType.UnsafeMakeSlice(0, 0))
84 sliceType.UnsafeGrow(ptr, 1)
85 elemPtr := sliceType.UnsafeGetIndex(ptr, 0)
86 decoder.elemDecoder.Decode(elemPtr, iter)
88 for c = iter.nextToken(); c == ','; c = iter.nextToken() {
91 sliceType.UnsafeGrow(ptr, length)
92 elemPtr = sliceType.UnsafeGetIndex(ptr, idx)
93 decoder.elemDecoder.Decode(elemPtr, iter)
96 iter.ReportError("decode slice", "expect ], but found "+string([]byte{c}))