mirror of
https://github.com/containers/podman.git
synced 2025-10-31 10:00:01 +08:00
692 lines
20 KiB
Go
692 lines
20 KiB
Go
package jsoniter
|
|
|
|
import (
|
|
"encoding"
|
|
"encoding/json"
|
|
"fmt"
|
|
"reflect"
|
|
"time"
|
|
"unsafe"
|
|
)
|
|
|
|
// 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)
|
|
EncodeInterface(val interface{}, stream *Stream)
|
|
}
|
|
|
|
type checkIsEmpty interface {
|
|
IsEmpty(ptr unsafe.Pointer) bool
|
|
}
|
|
|
|
// WriteToStream the default implementation for TypeEncoder method EncodeInterface
|
|
func WriteToStream(val interface{}, stream *Stream, encoder ValEncoder) {
|
|
e := (*emptyInterface)(unsafe.Pointer(&val))
|
|
if e.word == nil {
|
|
stream.WriteNil()
|
|
return
|
|
}
|
|
if reflect.TypeOf(val).Kind() == reflect.Ptr {
|
|
encoder.Encode(unsafe.Pointer(&e.word), stream)
|
|
} else {
|
|
encoder.Encode(e.word, stream)
|
|
}
|
|
}
|
|
|
|
var jsonNumberType reflect.Type
|
|
var jsoniterNumberType reflect.Type
|
|
var jsonRawMessageType reflect.Type
|
|
var jsoniterRawMessageType reflect.Type
|
|
var anyType reflect.Type
|
|
var marshalerType reflect.Type
|
|
var unmarshalerType reflect.Type
|
|
var textMarshalerType reflect.Type
|
|
var textUnmarshalerType reflect.Type
|
|
|
|
func init() {
|
|
jsonNumberType = reflect.TypeOf((*json.Number)(nil)).Elem()
|
|
jsoniterNumberType = reflect.TypeOf((*Number)(nil)).Elem()
|
|
jsonRawMessageType = reflect.TypeOf((*json.RawMessage)(nil)).Elem()
|
|
jsoniterRawMessageType = reflect.TypeOf((*RawMessage)(nil)).Elem()
|
|
anyType = reflect.TypeOf((*Any)(nil)).Elem()
|
|
marshalerType = reflect.TypeOf((*json.Marshaler)(nil)).Elem()
|
|
unmarshalerType = reflect.TypeOf((*json.Unmarshaler)(nil)).Elem()
|
|
textMarshalerType = reflect.TypeOf((*encoding.TextMarshaler)(nil)).Elem()
|
|
textUnmarshalerType = reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem()
|
|
}
|
|
|
|
type optionalDecoder struct {
|
|
valueType reflect.Type
|
|
valueDecoder ValDecoder
|
|
}
|
|
|
|
func (decoder *optionalDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
|
|
if iter.ReadNil() {
|
|
*((*unsafe.Pointer)(ptr)) = nil
|
|
} else {
|
|
if *((*unsafe.Pointer)(ptr)) == nil {
|
|
//pointer to null, we have to allocate memory to hold the value
|
|
value := reflect.New(decoder.valueType)
|
|
newPtr := extractInterface(value.Interface()).word
|
|
decoder.valueDecoder.Decode(newPtr, iter)
|
|
*((*uintptr)(ptr)) = uintptr(newPtr)
|
|
} else {
|
|
//reuse existing instance
|
|
decoder.valueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
|
|
}
|
|
}
|
|
}
|
|
|
|
type deferenceDecoder struct {
|
|
// only to deference a pointer
|
|
valueType reflect.Type
|
|
valueDecoder ValDecoder
|
|
}
|
|
|
|
func (decoder *deferenceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
|
|
if *((*unsafe.Pointer)(ptr)) == nil {
|
|
//pointer to null, we have to allocate memory to hold the value
|
|
value := reflect.New(decoder.valueType)
|
|
newPtr := extractInterface(value.Interface()).word
|
|
decoder.valueDecoder.Decode(newPtr, iter)
|
|
*((*uintptr)(ptr)) = uintptr(newPtr)
|
|
} else {
|
|
//reuse existing instance
|
|
decoder.valueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
|
|
}
|
|
}
|
|
|
|
type optionalEncoder struct {
|
|
valueEncoder ValEncoder
|
|
}
|
|
|
|
func (encoder *optionalEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
|
|
if *((*unsafe.Pointer)(ptr)) == nil {
|
|
stream.WriteNil()
|
|
} else {
|
|
encoder.valueEncoder.Encode(*((*unsafe.Pointer)(ptr)), stream)
|
|
}
|
|
}
|
|
|
|
func (encoder *optionalEncoder) EncodeInterface(val interface{}, stream *Stream) {
|
|
WriteToStream(val, stream, encoder)
|
|
}
|
|
|
|
func (encoder *optionalEncoder) IsEmpty(ptr unsafe.Pointer) bool {
|
|
if *((*unsafe.Pointer)(ptr)) == nil {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
type placeholderEncoder struct {
|
|
cfg *frozenConfig
|
|
cacheKey reflect.Type
|
|
}
|
|
|
|
func (encoder *placeholderEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
|
|
encoder.getRealEncoder().Encode(ptr, stream)
|
|
}
|
|
|
|
func (encoder *placeholderEncoder) EncodeInterface(val interface{}, stream *Stream) {
|
|
WriteToStream(val, stream, encoder)
|
|
}
|
|
|
|
func (encoder *placeholderEncoder) IsEmpty(ptr unsafe.Pointer) bool {
|
|
return encoder.getRealEncoder().IsEmpty(ptr)
|
|
}
|
|
|
|
func (encoder *placeholderEncoder) getRealEncoder() ValEncoder {
|
|
for i := 0; i < 30; i++ {
|
|
realDecoder := encoder.cfg.getEncoderFromCache(encoder.cacheKey)
|
|
_, isPlaceholder := realDecoder.(*placeholderEncoder)
|
|
if isPlaceholder {
|
|
time.Sleep(time.Second)
|
|
} else {
|
|
return realDecoder
|
|
}
|
|
}
|
|
panic(fmt.Sprintf("real encoder not found for cache key: %v", encoder.cacheKey))
|
|
}
|
|
|
|
type placeholderDecoder struct {
|
|
cfg *frozenConfig
|
|
cacheKey reflect.Type
|
|
}
|
|
|
|
func (decoder *placeholderDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
|
|
for i := 0; i < 30; i++ {
|
|
realDecoder := decoder.cfg.getDecoderFromCache(decoder.cacheKey)
|
|
_, isPlaceholder := realDecoder.(*placeholderDecoder)
|
|
if isPlaceholder {
|
|
time.Sleep(time.Second)
|
|
} else {
|
|
realDecoder.Decode(ptr, iter)
|
|
return
|
|
}
|
|
}
|
|
panic(fmt.Sprintf("real decoder not found for cache key: %v", decoder.cacheKey))
|
|
}
|
|
|
|
// emptyInterface is the header for an interface{} value.
|
|
type emptyInterface struct {
|
|
typ unsafe.Pointer
|
|
word unsafe.Pointer
|
|
}
|
|
|
|
// emptyInterface is the header for an interface with method (not interface{})
|
|
type nonEmptyInterface struct {
|
|
// see ../runtime/iface.go:/Itab
|
|
itab *struct {
|
|
ityp unsafe.Pointer // static interface type
|
|
typ unsafe.Pointer // dynamic concrete type
|
|
link unsafe.Pointer
|
|
bad int32
|
|
unused int32
|
|
fun [100000]unsafe.Pointer // method table
|
|
}
|
|
word unsafe.Pointer
|
|
}
|
|
|
|
// ReadVal copy the underlying JSON into go interface, same as json.Unmarshal
|
|
func (iter *Iterator) ReadVal(obj interface{}) {
|
|
typ := reflect.TypeOf(obj)
|
|
cacheKey := typ.Elem()
|
|
decoder, err := decoderOfType(iter.cfg, cacheKey)
|
|
if err != nil {
|
|
iter.Error = err
|
|
return
|
|
}
|
|
e := (*emptyInterface)(unsafe.Pointer(&obj))
|
|
decoder.Decode(e.word, iter)
|
|
}
|
|
|
|
// WriteVal copy the go interface into underlying JSON, same as json.Marshal
|
|
func (stream *Stream) WriteVal(val interface{}) {
|
|
if nil == val {
|
|
stream.WriteNil()
|
|
return
|
|
}
|
|
typ := reflect.TypeOf(val)
|
|
cacheKey := typ
|
|
encoder, err := encoderOfType(stream.cfg, cacheKey)
|
|
if err != nil {
|
|
stream.Error = err
|
|
return
|
|
}
|
|
encoder.EncodeInterface(val, stream)
|
|
}
|
|
|
|
type prefix string
|
|
|
|
func (p prefix) addToDecoder(decoder ValDecoder, err error) (ValDecoder, error) {
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%s: %s", p, err.Error())
|
|
}
|
|
return decoder, err
|
|
}
|
|
|
|
func (p prefix) addToEncoder(encoder ValEncoder, err error) (ValEncoder, error) {
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%s: %s", p, err.Error())
|
|
}
|
|
return encoder, err
|
|
}
|
|
|
|
func decoderOfType(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
|
|
cacheKey := typ
|
|
decoder := cfg.getDecoderFromCache(cacheKey)
|
|
if decoder != nil {
|
|
return decoder, nil
|
|
}
|
|
decoder = getTypeDecoderFromExtension(typ)
|
|
if decoder != nil {
|
|
cfg.addDecoderToCache(cacheKey, decoder)
|
|
return decoder, nil
|
|
}
|
|
decoder = &placeholderDecoder{cfg: cfg, cacheKey: cacheKey}
|
|
cfg.addDecoderToCache(cacheKey, decoder)
|
|
decoder, err := createDecoderOfType(cfg, typ)
|
|
for _, extension := range extensions {
|
|
decoder = extension.DecorateDecoder(typ, decoder)
|
|
}
|
|
cfg.addDecoderToCache(cacheKey, decoder)
|
|
return decoder, err
|
|
}
|
|
|
|
func createDecoderOfType(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
|
|
typeName := typ.String()
|
|
if typ == jsonRawMessageType {
|
|
return &jsonRawMessageCodec{}, nil
|
|
}
|
|
if typ == jsoniterRawMessageType {
|
|
return &jsoniterRawMessageCodec{}, nil
|
|
}
|
|
if typ.AssignableTo(jsonNumberType) {
|
|
return &jsonNumberCodec{}, nil
|
|
}
|
|
if typ.AssignableTo(jsoniterNumberType) {
|
|
return &jsoniterNumberCodec{}, nil
|
|
}
|
|
if typ.Implements(unmarshalerType) {
|
|
templateInterface := reflect.New(typ).Elem().Interface()
|
|
var decoder ValDecoder = &unmarshalerDecoder{extractInterface(templateInterface)}
|
|
if typ.Kind() == reflect.Ptr {
|
|
decoder = &optionalDecoder{typ.Elem(), decoder}
|
|
}
|
|
return decoder, nil
|
|
}
|
|
if reflect.PtrTo(typ).Implements(unmarshalerType) {
|
|
templateInterface := reflect.New(typ).Interface()
|
|
var decoder ValDecoder = &unmarshalerDecoder{extractInterface(templateInterface)}
|
|
return decoder, nil
|
|
}
|
|
if typ.Implements(textUnmarshalerType) {
|
|
templateInterface := reflect.New(typ).Elem().Interface()
|
|
var decoder ValDecoder = &textUnmarshalerDecoder{extractInterface(templateInterface)}
|
|
if typ.Kind() == reflect.Ptr {
|
|
decoder = &optionalDecoder{typ.Elem(), decoder}
|
|
}
|
|
return decoder, nil
|
|
}
|
|
if reflect.PtrTo(typ).Implements(textUnmarshalerType) {
|
|
templateInterface := reflect.New(typ).Interface()
|
|
var decoder ValDecoder = &textUnmarshalerDecoder{extractInterface(templateInterface)}
|
|
return decoder, nil
|
|
}
|
|
if typ.Kind() == reflect.Slice && typ.Elem().Kind() == reflect.Uint8 {
|
|
sliceDecoder, err := prefix("[slice]").addToDecoder(decoderOfSlice(cfg, typ))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &base64Codec{sliceDecoder: sliceDecoder}, nil
|
|
}
|
|
if typ.Implements(anyType) {
|
|
return &anyCodec{}, nil
|
|
}
|
|
switch typ.Kind() {
|
|
case reflect.String:
|
|
if typeName != "string" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*string)(nil)).Elem())
|
|
}
|
|
return &stringCodec{}, nil
|
|
case reflect.Int:
|
|
if typeName != "int" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*int)(nil)).Elem())
|
|
}
|
|
return &intCodec{}, nil
|
|
case reflect.Int8:
|
|
if typeName != "int8" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*int8)(nil)).Elem())
|
|
}
|
|
return &int8Codec{}, nil
|
|
case reflect.Int16:
|
|
if typeName != "int16" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*int16)(nil)).Elem())
|
|
}
|
|
return &int16Codec{}, nil
|
|
case reflect.Int32:
|
|
if typeName != "int32" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*int32)(nil)).Elem())
|
|
}
|
|
return &int32Codec{}, nil
|
|
case reflect.Int64:
|
|
if typeName != "int64" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*int64)(nil)).Elem())
|
|
}
|
|
return &int64Codec{}, nil
|
|
case reflect.Uint:
|
|
if typeName != "uint" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*uint)(nil)).Elem())
|
|
}
|
|
return &uintCodec{}, nil
|
|
case reflect.Uint8:
|
|
if typeName != "uint8" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*uint8)(nil)).Elem())
|
|
}
|
|
return &uint8Codec{}, nil
|
|
case reflect.Uint16:
|
|
if typeName != "uint16" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*uint16)(nil)).Elem())
|
|
}
|
|
return &uint16Codec{}, nil
|
|
case reflect.Uint32:
|
|
if typeName != "uint32" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*uint32)(nil)).Elem())
|
|
}
|
|
return &uint32Codec{}, nil
|
|
case reflect.Uintptr:
|
|
if typeName != "uintptr" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*uintptr)(nil)).Elem())
|
|
}
|
|
return &uintptrCodec{}, nil
|
|
case reflect.Uint64:
|
|
if typeName != "uint64" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*uint64)(nil)).Elem())
|
|
}
|
|
return &uint64Codec{}, nil
|
|
case reflect.Float32:
|
|
if typeName != "float32" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*float32)(nil)).Elem())
|
|
}
|
|
return &float32Codec{}, nil
|
|
case reflect.Float64:
|
|
if typeName != "float64" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*float64)(nil)).Elem())
|
|
}
|
|
return &float64Codec{}, nil
|
|
case reflect.Bool:
|
|
if typeName != "bool" {
|
|
return decoderOfType(cfg, reflect.TypeOf((*bool)(nil)).Elem())
|
|
}
|
|
return &boolCodec{}, nil
|
|
case reflect.Interface:
|
|
if typ.NumMethod() == 0 {
|
|
return &emptyInterfaceCodec{}, nil
|
|
}
|
|
return &nonEmptyInterfaceCodec{}, nil
|
|
case reflect.Struct:
|
|
return prefix(fmt.Sprintf("[%s]", typeName)).addToDecoder(decoderOfStruct(cfg, typ))
|
|
case reflect.Array:
|
|
return prefix("[array]").addToDecoder(decoderOfArray(cfg, typ))
|
|
case reflect.Slice:
|
|
return prefix("[slice]").addToDecoder(decoderOfSlice(cfg, typ))
|
|
case reflect.Map:
|
|
return prefix("[map]").addToDecoder(decoderOfMap(cfg, typ))
|
|
case reflect.Ptr:
|
|
return prefix("[optional]").addToDecoder(decoderOfOptional(cfg, typ))
|
|
default:
|
|
return nil, fmt.Errorf("unsupported type: %v", typ)
|
|
}
|
|
}
|
|
|
|
func encoderOfType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
|
|
cacheKey := typ
|
|
encoder := cfg.getEncoderFromCache(cacheKey)
|
|
if encoder != nil {
|
|
return encoder, nil
|
|
}
|
|
encoder = getTypeEncoderFromExtension(typ)
|
|
if encoder != nil {
|
|
cfg.addEncoderToCache(cacheKey, encoder)
|
|
return encoder, nil
|
|
}
|
|
encoder = &placeholderEncoder{cfg: cfg, cacheKey: cacheKey}
|
|
cfg.addEncoderToCache(cacheKey, encoder)
|
|
encoder, err := createEncoderOfType(cfg, typ)
|
|
for _, extension := range extensions {
|
|
encoder = extension.DecorateEncoder(typ, encoder)
|
|
}
|
|
cfg.addEncoderToCache(cacheKey, encoder)
|
|
return encoder, err
|
|
}
|
|
|
|
func createEncoderOfType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
|
|
if typ == jsonRawMessageType {
|
|
return &jsonRawMessageCodec{}, nil
|
|
}
|
|
if typ == jsoniterRawMessageType {
|
|
return &jsoniterRawMessageCodec{}, nil
|
|
}
|
|
if typ.AssignableTo(jsonNumberType) {
|
|
return &jsonNumberCodec{}, nil
|
|
}
|
|
if typ.AssignableTo(jsoniterNumberType) {
|
|
return &jsoniterNumberCodec{}, nil
|
|
}
|
|
if typ.Implements(marshalerType) {
|
|
checkIsEmpty, err := createCheckIsEmpty(typ)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
templateInterface := reflect.New(typ).Elem().Interface()
|
|
var encoder ValEncoder = &marshalerEncoder{
|
|
templateInterface: extractInterface(templateInterface),
|
|
checkIsEmpty: checkIsEmpty,
|
|
}
|
|
if typ.Kind() == reflect.Ptr {
|
|
encoder = &optionalEncoder{encoder}
|
|
}
|
|
return encoder, nil
|
|
}
|
|
if typ.Implements(textMarshalerType) {
|
|
checkIsEmpty, err := createCheckIsEmpty(typ)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
templateInterface := reflect.New(typ).Elem().Interface()
|
|
var encoder ValEncoder = &textMarshalerEncoder{
|
|
templateInterface: extractInterface(templateInterface),
|
|
checkIsEmpty: checkIsEmpty,
|
|
}
|
|
if typ.Kind() == reflect.Ptr {
|
|
encoder = &optionalEncoder{encoder}
|
|
}
|
|
return encoder, nil
|
|
}
|
|
if typ.Kind() == reflect.Slice && typ.Elem().Kind() == reflect.Uint8 {
|
|
return &base64Codec{}, nil
|
|
}
|
|
if typ.Implements(anyType) {
|
|
return &anyCodec{}, nil
|
|
}
|
|
return createEncoderOfSimpleType(cfg, typ)
|
|
}
|
|
|
|
func createCheckIsEmpty(typ reflect.Type) (checkIsEmpty, error) {
|
|
kind := typ.Kind()
|
|
switch kind {
|
|
case reflect.String:
|
|
return &stringCodec{}, nil
|
|
case reflect.Int:
|
|
return &intCodec{}, nil
|
|
case reflect.Int8:
|
|
return &int8Codec{}, nil
|
|
case reflect.Int16:
|
|
return &int16Codec{}, nil
|
|
case reflect.Int32:
|
|
return &int32Codec{}, nil
|
|
case reflect.Int64:
|
|
return &int64Codec{}, nil
|
|
case reflect.Uint:
|
|
return &uintCodec{}, nil
|
|
case reflect.Uint8:
|
|
return &uint8Codec{}, nil
|
|
case reflect.Uint16:
|
|
return &uint16Codec{}, nil
|
|
case reflect.Uint32:
|
|
return &uint32Codec{}, nil
|
|
case reflect.Uintptr:
|
|
return &uintptrCodec{}, nil
|
|
case reflect.Uint64:
|
|
return &uint64Codec{}, nil
|
|
case reflect.Float32:
|
|
return &float32Codec{}, nil
|
|
case reflect.Float64:
|
|
return &float64Codec{}, nil
|
|
case reflect.Bool:
|
|
return &boolCodec{}, nil
|
|
case reflect.Interface:
|
|
if typ.NumMethod() == 0 {
|
|
return &emptyInterfaceCodec{}, nil
|
|
}
|
|
return &nonEmptyInterfaceCodec{}, nil
|
|
case reflect.Struct:
|
|
return &structEncoder{}, nil
|
|
case reflect.Array:
|
|
return &arrayEncoder{}, nil
|
|
case reflect.Slice:
|
|
return &sliceEncoder{}, nil
|
|
case reflect.Map:
|
|
return &mapEncoder{}, nil
|
|
case reflect.Ptr:
|
|
return &optionalEncoder{}, nil
|
|
default:
|
|
return nil, fmt.Errorf("unsupported type: %v", typ)
|
|
}
|
|
}
|
|
|
|
func createEncoderOfSimpleType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
|
|
typeName := typ.String()
|
|
kind := typ.Kind()
|
|
switch kind {
|
|
case reflect.String:
|
|
if typeName != "string" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*string)(nil)).Elem())
|
|
}
|
|
return &stringCodec{}, nil
|
|
case reflect.Int:
|
|
if typeName != "int" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*int)(nil)).Elem())
|
|
}
|
|
return &intCodec{}, nil
|
|
case reflect.Int8:
|
|
if typeName != "int8" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*int8)(nil)).Elem())
|
|
}
|
|
return &int8Codec{}, nil
|
|
case reflect.Int16:
|
|
if typeName != "int16" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*int16)(nil)).Elem())
|
|
}
|
|
return &int16Codec{}, nil
|
|
case reflect.Int32:
|
|
if typeName != "int32" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*int32)(nil)).Elem())
|
|
}
|
|
return &int32Codec{}, nil
|
|
case reflect.Int64:
|
|
if typeName != "int64" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*int64)(nil)).Elem())
|
|
}
|
|
return &int64Codec{}, nil
|
|
case reflect.Uint:
|
|
if typeName != "uint" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*uint)(nil)).Elem())
|
|
}
|
|
return &uintCodec{}, nil
|
|
case reflect.Uint8:
|
|
if typeName != "uint8" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*uint8)(nil)).Elem())
|
|
}
|
|
return &uint8Codec{}, nil
|
|
case reflect.Uint16:
|
|
if typeName != "uint16" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*uint16)(nil)).Elem())
|
|
}
|
|
return &uint16Codec{}, nil
|
|
case reflect.Uint32:
|
|
if typeName != "uint32" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*uint32)(nil)).Elem())
|
|
}
|
|
return &uint32Codec{}, nil
|
|
case reflect.Uintptr:
|
|
if typeName != "uintptr" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*uintptr)(nil)).Elem())
|
|
}
|
|
return &uintptrCodec{}, nil
|
|
case reflect.Uint64:
|
|
if typeName != "uint64" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*uint64)(nil)).Elem())
|
|
}
|
|
return &uint64Codec{}, nil
|
|
case reflect.Float32:
|
|
if typeName != "float32" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*float32)(nil)).Elem())
|
|
}
|
|
return &float32Codec{}, nil
|
|
case reflect.Float64:
|
|
if typeName != "float64" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*float64)(nil)).Elem())
|
|
}
|
|
return &float64Codec{}, nil
|
|
case reflect.Bool:
|
|
if typeName != "bool" {
|
|
return encoderOfType(cfg, reflect.TypeOf((*bool)(nil)).Elem())
|
|
}
|
|
return &boolCodec{}, nil
|
|
case reflect.Interface:
|
|
if typ.NumMethod() == 0 {
|
|
return &emptyInterfaceCodec{}, nil
|
|
}
|
|
return &nonEmptyInterfaceCodec{}, nil
|
|
case reflect.Struct:
|
|
return prefix(fmt.Sprintf("[%s]", typeName)).addToEncoder(encoderOfStruct(cfg, typ))
|
|
case reflect.Array:
|
|
return prefix("[array]").addToEncoder(encoderOfArray(cfg, typ))
|
|
case reflect.Slice:
|
|
return prefix("[slice]").addToEncoder(encoderOfSlice(cfg, typ))
|
|
case reflect.Map:
|
|
return prefix("[map]").addToEncoder(encoderOfMap(cfg, typ))
|
|
case reflect.Ptr:
|
|
return prefix("[optional]").addToEncoder(encoderOfOptional(cfg, typ))
|
|
default:
|
|
return nil, fmt.Errorf("unsupported type: %v", typ)
|
|
}
|
|
}
|
|
|
|
func decoderOfOptional(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
|
|
elemType := typ.Elem()
|
|
decoder, err := decoderOfType(cfg, elemType)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &optionalDecoder{elemType, decoder}, nil
|
|
}
|
|
|
|
func encoderOfOptional(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
|
|
elemType := typ.Elem()
|
|
elemEncoder, err := encoderOfType(cfg, elemType)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
encoder := &optionalEncoder{elemEncoder}
|
|
if elemType.Kind() == reflect.Map {
|
|
encoder = &optionalEncoder{encoder}
|
|
}
|
|
return encoder, nil
|
|
}
|
|
|
|
func decoderOfMap(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
|
|
decoder, err := decoderOfType(cfg, typ.Elem())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
mapInterface := reflect.New(typ).Interface()
|
|
return &mapDecoder{typ, typ.Key(), typ.Elem(), decoder, extractInterface(mapInterface)}, nil
|
|
}
|
|
|
|
func extractInterface(val interface{}) emptyInterface {
|
|
return *((*emptyInterface)(unsafe.Pointer(&val)))
|
|
}
|
|
|
|
func encoderOfMap(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
|
|
elemType := typ.Elem()
|
|
encoder, err := encoderOfType(cfg, elemType)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
mapInterface := reflect.New(typ).Elem().Interface()
|
|
if cfg.sortMapKeys {
|
|
return &sortKeysMapEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
|
|
}
|
|
return &mapEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
|
|
}
|