1 files changed, 337 insertions, 0 deletions

diff --git a/vendor/github.com/json-iterator/go/reflect.go b/vendor/github.com/json-iterator/go/reflect.go
new file mode 100644
index 0000000..39acb32
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect.go
@@ -0,0 +1,337 @@
+package jsoniter
+
+import (
+        "fmt"
+        "reflect"
+        "unsafe"
+
+        "github.com/modern-go/reflect2"
+)
+
+// ValDecoder is an internal type registered to cache as needed.
+// Don't confuse jsoniter.ValDecoder with json.Decoder.
+// For json.Decoder's adapter, refer to jsoniter.AdapterDecoder(todo link).
+//
+// Reflection on type to create decoders, which is then cached
+// Reflection on value is avoided as we can, as the reflect.Value itself will allocate, with following exceptions
+// 1. create instance of new value, for example *int will need a int to be allocated
+// 2. append to slice, if the existing cap is not enough, allocate will be done using Reflect.New
+// 3. assignment to map, both key and value will be reflect.Value
+// For a simple struct binding, it will be reflect.Value free and allocation free
+type ValDecoder interface {
+        Decode(ptr unsafe.Pointer, iter *Iterator)
+}
+
+// ValEncoder is an internal type registered to cache as needed.
+// Don't confuse jsoniter.ValEncoder with json.Encoder.
+// For json.Encoder's adapter, refer to jsoniter.AdapterEncoder(todo godoc link).
+type ValEncoder interface {
+        IsEmpty(ptr unsafe.Pointer) bool
+        Encode(ptr unsafe.Pointer, stream *Stream)
+}
+
+type checkIsEmpty interface {
+        IsEmpty(ptr unsafe.Pointer) bool
+}
+
+type ctx struct {
+        *frozenConfig
+        prefix   string
+        encoders map[reflect2.Type]ValEncoder
+        decoders map[reflect2.Type]ValDecoder
+}
+
+func (b *ctx) caseSensitive() bool {
+        if b.frozenConfig == nil {
+                // default is case-insensitive
+                return false
+        }
+        return b.frozenConfig.caseSensitive
+}
+
+func (b *ctx) append(prefix string) *ctx {
+        return &ctx{
+                frozenConfig: b.frozenConfig,
+                prefix:       b.prefix + " " + prefix,
+                encoders:     b.encoders,
+                decoders:     b.decoders,
+        }
+}
+
+// ReadVal copy the underlying JSON into go interface, same as json.Unmarshal
+func (iter *Iterator) ReadVal(obj interface{}) {
+        depth := iter.depth
+        cacheKey := reflect2.RTypeOf(obj)
+        decoder := iter.cfg.getDecoderFromCache(cacheKey)
+        if decoder == nil {
+                typ := reflect2.TypeOf(obj)
+                if typ == nil || typ.Kind() != reflect.Ptr {
+                        iter.ReportError("ReadVal", "can only unmarshal into pointer")
+                        return
+                }
+                decoder = iter.cfg.DecoderOf(typ)
+        }
+        ptr := reflect2.PtrOf(obj)
+        if ptr == nil {
+                iter.ReportError("ReadVal", "can not read into nil pointer")
+                return
+        }
+        decoder.Decode(ptr, iter)
+        if iter.depth != depth {
+                iter.ReportError("ReadVal", "unexpected mismatched nesting")
+                return
+        }
+}
+
+// WriteVal copy the go interface into underlying JSON, same as json.Marshal
+func (stream *Stream) WriteVal(val interface{}) {
+        if nil == val {
+                stream.WriteNil()
+                return
+        }
+        cacheKey := reflect2.RTypeOf(val)
+        encoder := stream.cfg.getEncoderFromCache(cacheKey)
+        if encoder == nil {
+                typ := reflect2.TypeOf(val)
+                encoder = stream.cfg.EncoderOf(typ)
+        }
+        encoder.Encode(reflect2.PtrOf(val), stream)
+}
+
+func (cfg *frozenConfig) DecoderOf(typ reflect2.Type) ValDecoder {
+        cacheKey := typ.RType()
+        decoder := cfg.getDecoderFromCache(cacheKey)
+        if decoder != nil {
+                return decoder
+        }
+        ctx := &ctx{
+                frozenConfig: cfg,
+                prefix:       "",
+                decoders:     map[reflect2.Type]ValDecoder{},
+                encoders:     map[reflect2.Type]ValEncoder{},
+        }
+        ptrType := typ.(*reflect2.UnsafePtrType)
+        decoder = decoderOfType(ctx, ptrType.Elem())
+        cfg.addDecoderToCache(cacheKey, decoder)
+        return decoder
+}
+
+func decoderOfType(ctx *ctx, typ reflect2.Type) ValDecoder {
+        decoder := getTypeDecoderFromExtension(ctx, typ)
+        if decoder != nil {
+                return decoder
+        }
+        decoder = createDecoderOfType(ctx, typ)
+        for _, extension := range extensions {
+                decoder = extension.DecorateDecoder(typ, decoder)
+        }
+        decoder = ctx.decoderExtension.DecorateDecoder(typ, decoder)
+        for _, extension := range ctx.extraExtensions {
+                decoder = extension.DecorateDecoder(typ, decoder)
+        }
+        return decoder
+}
+
+func createDecoderOfType(ctx *ctx, typ reflect2.Type) ValDecoder {
+        decoder := ctx.decoders[typ]
+        if decoder != nil {
+                return decoder
+        }
+        placeholder := &placeholderDecoder{}
+        ctx.decoders[typ] = placeholder
+        decoder = _createDecoderOfType(ctx, typ)
+        placeholder.decoder = decoder
+        return decoder
+}
+
+func _createDecoderOfType(ctx *ctx, typ reflect2.Type) ValDecoder {
+        decoder := createDecoderOfJsonRawMessage(ctx, typ)
+        if decoder != nil {
+                return decoder
+        }
+        decoder = createDecoderOfJsonNumber(ctx, typ)
+        if decoder != nil {
+                return decoder
+        }
+        decoder = createDecoderOfMarshaler(ctx, typ)
+        if decoder != nil {
+                return decoder
+        }
+        decoder = createDecoderOfAny(ctx, typ)
+        if decoder != nil {
+                return decoder
+        }
+        decoder = createDecoderOfNative(ctx, typ)
+        if decoder != nil {
+                return decoder
+        }
+        switch typ.Kind() {
+        case reflect.Interface:
+                ifaceType, isIFace := typ.(*reflect2.UnsafeIFaceType)
+                if isIFace {
+                        return &ifaceDecoder{valType: ifaceType}
+                }
+                return &efaceDecoder{}
+        case reflect.Struct:
+                return decoderOfStruct(ctx, typ)
+        case reflect.Array:
+                return decoderOfArray(ctx, typ)
+        case reflect.Slice:
+                return decoderOfSlice(ctx, typ)
+        case reflect.Map:
+                return decoderOfMap(ctx, typ)
+        case reflect.Ptr:
+                return decoderOfOptional(ctx, typ)
+        default:
+                return &lazyErrorDecoder{err: fmt.Errorf("%s%s is unsupported type", ctx.prefix, typ.String())}
+        }
+}
+
+func (cfg *frozenConfig) EncoderOf(typ reflect2.Type) ValEncoder {
+        cacheKey := typ.RType()
+        encoder := cfg.getEncoderFromCache(cacheKey)
+        if encoder != nil {
+                return encoder
+        }
+        ctx := &ctx{
+                frozenConfig: cfg,
+                prefix:       "",
+                decoders:     map[reflect2.Type]ValDecoder{},
+                encoders:     map[reflect2.Type]ValEncoder{},
+        }
+        encoder = encoderOfType(ctx, typ)
+        if typ.LikePtr() {
+                encoder = &onePtrEncoder{encoder}
+        }
+        cfg.addEncoderToCache(cacheKey, encoder)
+        return encoder
+}
+
+type onePtrEncoder struct {
+        encoder ValEncoder
+}
+
+func (encoder *onePtrEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+        return encoder.encoder.IsEmpty(unsafe.Pointer(&ptr))
+}
+
+func (encoder *onePtrEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+        encoder.encoder.Encode(unsafe.Pointer(&ptr), stream)
+}
+
+func encoderOfType(ctx *ctx, typ reflect2.Type) ValEncoder {
+        encoder := getTypeEncoderFromExtension(ctx, typ)
+        if encoder != nil {
+                return encoder
+        }
+        encoder = createEncoderOfType(ctx, typ)
+        for _, extension := range extensions {
+                encoder = extension.DecorateEncoder(typ, encoder)
+        }
+        encoder = ctx.encoderExtension.DecorateEncoder(typ, encoder)
+        for _, extension := range ctx.extraExtensions {
+                encoder = extension.DecorateEncoder(typ, encoder)
+        }
+        return encoder
+}
+
+func createEncoderOfType(ctx *ctx, typ reflect2.Type) ValEncoder {
+        encoder := ctx.encoders[typ]
+        if encoder != nil {
+                return encoder
+        }
+        placeholder := &placeholderEncoder{}
+        ctx.encoders[typ] = placeholder
+        encoder = _createEncoderOfType(ctx, typ)
+        placeholder.encoder = encoder
+        return encoder
+}
+func _createEncoderOfType(ctx *ctx, typ reflect2.Type) ValEncoder {
+        encoder := createEncoderOfJsonRawMessage(ctx, typ)
+        if encoder != nil {
+                return encoder
+        }
+        encoder = createEncoderOfJsonNumber(ctx, typ)
+        if encoder != nil {
+                return encoder
+        }
+        encoder = createEncoderOfMarshaler(ctx, typ)
+        if encoder != nil {
+                return encoder
+        }
+        encoder = createEncoderOfAny(ctx, typ)
+        if encoder != nil {
+                return encoder
+        }
+        encoder = createEncoderOfNative(ctx, typ)
+        if encoder != nil {
+                return encoder
+        }
+        kind := typ.Kind()
+        switch kind {
+        case reflect.Interface:
+                return &dynamicEncoder{typ}
+        case reflect.Struct:
+                return encoderOfStruct(ctx, typ)
+        case reflect.Array:
+                return encoderOfArray(ctx, typ)
+        case reflect.Slice:
+                return encoderOfSlice(ctx, typ)
+        case reflect.Map:
+                return encoderOfMap(ctx, typ)
+        case reflect.Ptr:
+                return encoderOfOptional(ctx, typ)
+        default:
+                return &lazyErrorEncoder{err: fmt.Errorf("%s%s is unsupported type", ctx.prefix, typ.String())}
+        }
+}
+
+type lazyErrorDecoder struct {
+        err error
+}
+
+func (decoder *lazyErrorDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+        if iter.WhatIsNext() != NilValue {
+                if iter.Error == nil {
+                        iter.Error = decoder.err
+                }
+        } else {
+                iter.Skip()
+        }
+}
+
+type lazyErrorEncoder struct {
+        err error
+}
+
+func (encoder *lazyErrorEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+        if ptr == nil {
+                stream.WriteNil()
+        } else if stream.Error == nil {
+                stream.Error = encoder.err
+        }
+}
+
+func (encoder *lazyErrorEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+        return false
+}
+
+type placeholderDecoder struct {
+        decoder ValDecoder
+}
+
+func (decoder *placeholderDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+        decoder.decoder.Decode(ptr, iter)
+}
+
+type placeholderEncoder struct {
+        encoder ValEncoder
+}
+
+func (encoder *placeholderEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+        encoder.encoder.Encode(ptr, stream)
+}
+
+func (encoder *placeholderEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+        return encoder.encoder.IsEmpty(ptr)
+}