diff options
Diffstat (limited to 'vendor/github.com/json-iterator/go/feature_reflect_slice.go')
-rw-r--r-- | vendor/github.com/json-iterator/go/feature_reflect_slice.go | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/vendor/github.com/json-iterator/go/feature_reflect_slice.go b/vendor/github.com/json-iterator/go/feature_reflect_slice.go deleted file mode 100644 index 7377eec7b..000000000 --- a/vendor/github.com/json-iterator/go/feature_reflect_slice.go +++ /dev/null @@ -1,149 +0,0 @@ -package jsoniter - -import ( - "fmt" - "io" - "reflect" - "unsafe" -) - -func decoderOfSlice(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) { - decoder, err := decoderOfType(cfg, typ.Elem()) - if err != nil { - return nil, err - } - return &sliceDecoder{typ, typ.Elem(), decoder}, nil -} - -func encoderOfSlice(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) { - encoder, err := encoderOfType(cfg, typ.Elem()) - if err != nil { - return nil, err - } - if typ.Elem().Kind() == reflect.Map { - encoder = &optionalEncoder{encoder} - } - return &sliceEncoder{typ, typ.Elem(), encoder}, nil -} - -type sliceEncoder struct { - sliceType reflect.Type - elemType reflect.Type - elemEncoder ValEncoder -} - -func (encoder *sliceEncoder) Encode(ptr unsafe.Pointer, stream *Stream) { - slice := (*sliceHeader)(ptr) - if slice.Data == nil { - stream.WriteNil() - return - } - if slice.Len == 0 { - stream.WriteEmptyArray() - return - } - stream.WriteArrayStart() - elemPtr := unsafe.Pointer(slice.Data) - encoder.elemEncoder.Encode(unsafe.Pointer(elemPtr), stream) - for i := 1; i < slice.Len; i++ { - stream.WriteMore() - elemPtr = unsafe.Pointer(uintptr(elemPtr) + encoder.elemType.Size()) - encoder.elemEncoder.Encode(unsafe.Pointer(elemPtr), stream) - } - stream.WriteArrayEnd() - if stream.Error != nil && stream.Error != io.EOF { - stream.Error = fmt.Errorf("%v: %s", encoder.sliceType, stream.Error.Error()) - } -} - -func (encoder *sliceEncoder) EncodeInterface(val interface{}, stream *Stream) { - WriteToStream(val, stream, encoder) -} - -func (encoder *sliceEncoder) IsEmpty(ptr unsafe.Pointer) bool { - slice := (*sliceHeader)(ptr) - return slice.Len == 0 -} - -type sliceDecoder struct { - sliceType reflect.Type - elemType reflect.Type - elemDecoder ValDecoder -} - -// sliceHeader is a safe version of SliceHeader used within this package. -type sliceHeader struct { - Data unsafe.Pointer - Len int - Cap int -} - -func (decoder *sliceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) { - decoder.doDecode(ptr, iter) - if iter.Error != nil && iter.Error != io.EOF { - iter.Error = fmt.Errorf("%v: %s", decoder.sliceType, iter.Error.Error()) - } -} - -func (decoder *sliceDecoder) doDecode(ptr unsafe.Pointer, iter *Iterator) { - slice := (*sliceHeader)(ptr) - if iter.ReadNil() { - slice.Len = 0 - slice.Cap = 0 - slice.Data = nil - return - } - reuseSlice(slice, decoder.sliceType, 4) - slice.Len = 0 - offset := uintptr(0) - iter.ReadArrayCB(func(iter *Iterator) bool { - growOne(slice, decoder.sliceType, decoder.elemType) - decoder.elemDecoder.Decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter) - offset += decoder.elemType.Size() - return true - }) -} - -// grow grows the slice s so that it can hold extra more values, allocating -// more capacity if needed. It also returns the old and new slice lengths. -func growOne(slice *sliceHeader, sliceType reflect.Type, elementType reflect.Type) { - newLen := slice.Len + 1 - if newLen <= slice.Cap { - slice.Len = newLen - return - } - newCap := slice.Cap - if newCap == 0 { - newCap = 1 - } else { - for newCap < newLen { - if slice.Len < 1024 { - newCap += newCap - } else { - newCap += newCap / 4 - } - } - } - newVal := reflect.MakeSlice(sliceType, newLen, newCap) - dst := unsafe.Pointer(newVal.Pointer()) - // copy old array into new array - originalBytesCount := uintptr(slice.Len) * elementType.Size() - srcPtr := (*[1 << 30]byte)(slice.Data) - dstPtr := (*[1 << 30]byte)(dst) - for i := uintptr(0); i < originalBytesCount; i++ { - dstPtr[i] = srcPtr[i] - } - slice.Data = dst - slice.Len = newLen - slice.Cap = newCap -} - -func reuseSlice(slice *sliceHeader, sliceType reflect.Type, expectedCap int) { - if expectedCap <= slice.Cap { - return - } - newVal := reflect.MakeSlice(sliceType, 0, expectedCap) - dst := unsafe.Pointer(newVal.Pointer()) - slice.Data = dst - slice.Cap = expectedCap -} |