Bump kubernetes/client-go

vendor/github.com/json-iterator/go/feature_reflect_slice.go

@@ -0,0 +1,143 @@
+package jsoniter
+
+import (
+	"fmt"
+	"io"
+	"reflect"
+	"unsafe"
+)
+
+func decoderOfSlice(cfg *frozenConfig, prefix string, typ reflect.Type) ValDecoder {
+	decoder := decoderOfType(cfg, prefix+"[slice]->", typ.Elem())
+	return &sliceDecoder{typ, typ.Elem(), decoder}
+}
+
+func encoderOfSlice(cfg *frozenConfig, prefix string, typ reflect.Type) ValEncoder {
+	encoder := encoderOfType(cfg, prefix+"[slice]->", typ.Elem())
+	if typ.Elem().Kind() == reflect.Map {
+		encoder = &OptionalEncoder{encoder}
+	}
+	return &sliceEncoder{typ, typ.Elem(), encoder}
+}
+
+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).Interface()
+	newValPtr := extractInterface(newVal).word
+	dst := (*sliceHeader)(newValPtr).Data
+	// copy old array into new array
+	originalBytesCount := slice.Len * int(elementType.Size())
+	srcSliceHeader := (unsafe.Pointer)(&sliceHeader{slice.Data, originalBytesCount, originalBytesCount})
+	dstSliceHeader := (unsafe.Pointer)(&sliceHeader{dst, originalBytesCount, originalBytesCount})
+	copy(*(*[]byte)(dstSliceHeader), *(*[]byte)(srcSliceHeader))
+	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).Interface()
+	newValPtr := extractInterface(newVal).word
+	dst := (*sliceHeader)(newValPtr).Data
+	slice.Data = dst
+	slice.Cap = expectedCap
+}