Matteo Scandolo | a428586 | 2020-12-01 18:10:10 -0800 | [diff] [blame^] | 1 | package jsoniter |
| 2 | |
| 3 | import ( |
| 4 | "github.com/modern-go/reflect2" |
| 5 | "reflect" |
| 6 | "unsafe" |
| 7 | ) |
| 8 | |
| 9 | type dynamicEncoder struct { |
| 10 | valType reflect2.Type |
| 11 | } |
| 12 | |
| 13 | func (encoder *dynamicEncoder) Encode(ptr unsafe.Pointer, stream *Stream) { |
| 14 | obj := encoder.valType.UnsafeIndirect(ptr) |
| 15 | stream.WriteVal(obj) |
| 16 | } |
| 17 | |
| 18 | func (encoder *dynamicEncoder) IsEmpty(ptr unsafe.Pointer) bool { |
| 19 | return encoder.valType.UnsafeIndirect(ptr) == nil |
| 20 | } |
| 21 | |
| 22 | type efaceDecoder struct { |
| 23 | } |
| 24 | |
| 25 | func (decoder *efaceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) { |
| 26 | pObj := (*interface{})(ptr) |
| 27 | obj := *pObj |
| 28 | if obj == nil { |
| 29 | *pObj = iter.Read() |
| 30 | return |
| 31 | } |
| 32 | typ := reflect2.TypeOf(obj) |
| 33 | if typ.Kind() != reflect.Ptr { |
| 34 | *pObj = iter.Read() |
| 35 | return |
| 36 | } |
| 37 | ptrType := typ.(*reflect2.UnsafePtrType) |
| 38 | ptrElemType := ptrType.Elem() |
| 39 | if iter.WhatIsNext() == NilValue { |
| 40 | if ptrElemType.Kind() != reflect.Ptr { |
| 41 | iter.skipFourBytes('n', 'u', 'l', 'l') |
| 42 | *pObj = nil |
| 43 | return |
| 44 | } |
| 45 | } |
| 46 | if reflect2.IsNil(obj) { |
| 47 | obj := ptrElemType.New() |
| 48 | iter.ReadVal(obj) |
| 49 | *pObj = obj |
| 50 | return |
| 51 | } |
| 52 | iter.ReadVal(obj) |
| 53 | } |
| 54 | |
| 55 | type ifaceDecoder struct { |
| 56 | valType *reflect2.UnsafeIFaceType |
| 57 | } |
| 58 | |
| 59 | func (decoder *ifaceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) { |
| 60 | if iter.ReadNil() { |
| 61 | decoder.valType.UnsafeSet(ptr, decoder.valType.UnsafeNew()) |
| 62 | return |
| 63 | } |
| 64 | obj := decoder.valType.UnsafeIndirect(ptr) |
| 65 | if reflect2.IsNil(obj) { |
| 66 | iter.ReportError("decode non empty interface", "can not unmarshal into nil") |
| 67 | return |
| 68 | } |
| 69 | iter.ReadVal(obj) |
| 70 | } |