mirror of
https://github.com/rocky-linux/peridot.git
synced 2024-11-15 02:01:25 +00:00
100 lines
2.6 KiB
Go
100 lines
2.6 KiB
Go
package jsoniter
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/modern-go/reflect2"
|
|
"io"
|
|
"unsafe"
|
|
)
|
|
|
|
func decoderOfSlice(ctx *ctx, typ reflect2.Type) ValDecoder {
|
|
sliceType := typ.(*reflect2.UnsafeSliceType)
|
|
decoder := decoderOfType(ctx.append("[sliceElem]"), sliceType.Elem())
|
|
return &sliceDecoder{sliceType, decoder}
|
|
}
|
|
|
|
func encoderOfSlice(ctx *ctx, typ reflect2.Type) ValEncoder {
|
|
sliceType := typ.(*reflect2.UnsafeSliceType)
|
|
encoder := encoderOfType(ctx.append("[sliceElem]"), sliceType.Elem())
|
|
return &sliceEncoder{sliceType, encoder}
|
|
}
|
|
|
|
type sliceEncoder struct {
|
|
sliceType *reflect2.UnsafeSliceType
|
|
elemEncoder ValEncoder
|
|
}
|
|
|
|
func (encoder *sliceEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
|
|
if encoder.sliceType.UnsafeIsNil(ptr) {
|
|
stream.WriteNil()
|
|
return
|
|
}
|
|
length := encoder.sliceType.UnsafeLengthOf(ptr)
|
|
if length == 0 {
|
|
stream.WriteEmptyArray()
|
|
return
|
|
}
|
|
stream.WriteArrayStart()
|
|
encoder.elemEncoder.Encode(encoder.sliceType.UnsafeGetIndex(ptr, 0), stream)
|
|
for i := 1; i < length; i++ {
|
|
stream.WriteMore()
|
|
elemPtr := encoder.sliceType.UnsafeGetIndex(ptr, i)
|
|
encoder.elemEncoder.Encode(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) IsEmpty(ptr unsafe.Pointer) bool {
|
|
return encoder.sliceType.UnsafeLengthOf(ptr) == 0
|
|
}
|
|
|
|
type sliceDecoder struct {
|
|
sliceType *reflect2.UnsafeSliceType
|
|
elemDecoder ValDecoder
|
|
}
|
|
|
|
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) {
|
|
c := iter.nextToken()
|
|
sliceType := decoder.sliceType
|
|
if c == 'n' {
|
|
iter.skipThreeBytes('u', 'l', 'l')
|
|
sliceType.UnsafeSetNil(ptr)
|
|
return
|
|
}
|
|
if c != '[' {
|
|
iter.ReportError("decode slice", "expect [ or n, but found "+string([]byte{c}))
|
|
return
|
|
}
|
|
c = iter.nextToken()
|
|
if c == ']' {
|
|
sliceType.UnsafeSet(ptr, sliceType.UnsafeMakeSlice(0, 0))
|
|
return
|
|
}
|
|
iter.unreadByte()
|
|
sliceType.UnsafeGrow(ptr, 1)
|
|
elemPtr := sliceType.UnsafeGetIndex(ptr, 0)
|
|
decoder.elemDecoder.Decode(elemPtr, iter)
|
|
length := 1
|
|
for c = iter.nextToken(); c == ','; c = iter.nextToken() {
|
|
idx := length
|
|
length += 1
|
|
sliceType.UnsafeGrow(ptr, length)
|
|
elemPtr = sliceType.UnsafeGetIndex(ptr, idx)
|
|
decoder.elemDecoder.Decode(elemPtr, iter)
|
|
}
|
|
if c != ']' {
|
|
iter.ReportError("decode slice", "expect ], but found "+string([]byte{c}))
|
|
return
|
|
}
|
|
}
|