376 lines
10 KiB
Go
376 lines
10 KiB
Go
package jsoniter
|
|
|
|
import (
|
|
"encoding/json"
|
|
"io"
|
|
"reflect"
|
|
"sync"
|
|
"unsafe"
|
|
|
|
"github.com/modern-go/concurrent"
|
|
"github.com/modern-go/reflect2"
|
|
)
|
|
|
|
// Config customize how the API should behave.
|
|
// The API is created from Config by Froze.
|
|
type Config struct {
|
|
IndentionStep int
|
|
MarshalFloatWith6Digits bool
|
|
EscapeHTML bool
|
|
SortMapKeys bool
|
|
UseNumber bool
|
|
DisallowUnknownFields bool
|
|
TagKey string
|
|
OnlyTaggedField bool
|
|
ValidateJsonRawMessage bool
|
|
ObjectFieldMustBeSimpleString bool
|
|
CaseSensitive bool
|
|
}
|
|
|
|
// API the public interface of this package.
|
|
// Primary Marshal and Unmarshal.
|
|
type API interface {
|
|
IteratorPool
|
|
StreamPool
|
|
MarshalToString(v interface{}) (string, error)
|
|
Marshal(v interface{}) ([]byte, error)
|
|
MarshalIndent(v interface{}, prefix, indent string) ([]byte, error)
|
|
UnmarshalFromString(str string, v interface{}) error
|
|
Unmarshal(data []byte, v interface{}) error
|
|
Get(data []byte, path ...interface{}) Any
|
|
NewEncoder(writer io.Writer) *Encoder
|
|
NewDecoder(reader io.Reader) *Decoder
|
|
Valid(data []byte) bool
|
|
RegisterExtension(extension Extension)
|
|
DecoderOf(typ reflect2.Type) ValDecoder
|
|
EncoderOf(typ reflect2.Type) ValEncoder
|
|
}
|
|
|
|
// ConfigDefault the default API
|
|
var ConfigDefault = Config{
|
|
EscapeHTML: true,
|
|
}.Froze()
|
|
|
|
// ConfigCompatibleWithStandardLibrary tries to be 100% compatible with standard library behavior
|
|
var ConfigCompatibleWithStandardLibrary = Config{
|
|
EscapeHTML: true,
|
|
SortMapKeys: true,
|
|
ValidateJsonRawMessage: true,
|
|
}.Froze()
|
|
|
|
// ConfigFastest marshals float with only 6 digits precision
|
|
var ConfigFastest = Config{
|
|
EscapeHTML: false,
|
|
MarshalFloatWith6Digits: true, // will lose precession
|
|
ObjectFieldMustBeSimpleString: true, // do not unescape object field
|
|
}.Froze()
|
|
|
|
type frozenConfig struct {
|
|
configBeforeFrozen Config
|
|
sortMapKeys bool
|
|
indentionStep int
|
|
objectFieldMustBeSimpleString bool
|
|
onlyTaggedField bool
|
|
disallowUnknownFields bool
|
|
decoderCache *concurrent.Map
|
|
encoderCache *concurrent.Map
|
|
encoderExtension Extension
|
|
decoderExtension Extension
|
|
extraExtensions []Extension
|
|
streamPool *sync.Pool
|
|
iteratorPool *sync.Pool
|
|
caseSensitive bool
|
|
}
|
|
|
|
func (cfg *frozenConfig) initCache() {
|
|
cfg.decoderCache = concurrent.NewMap()
|
|
cfg.encoderCache = concurrent.NewMap()
|
|
}
|
|
|
|
func (cfg *frozenConfig) addDecoderToCache(cacheKey uintptr, decoder ValDecoder) {
|
|
cfg.decoderCache.Store(cacheKey, decoder)
|
|
}
|
|
|
|
func (cfg *frozenConfig) addEncoderToCache(cacheKey uintptr, encoder ValEncoder) {
|
|
cfg.encoderCache.Store(cacheKey, encoder)
|
|
}
|
|
|
|
func (cfg *frozenConfig) getDecoderFromCache(cacheKey uintptr) ValDecoder {
|
|
decoder, found := cfg.decoderCache.Load(cacheKey)
|
|
if found {
|
|
return decoder.(ValDecoder)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (cfg *frozenConfig) getEncoderFromCache(cacheKey uintptr) ValEncoder {
|
|
encoder, found := cfg.encoderCache.Load(cacheKey)
|
|
if found {
|
|
return encoder.(ValEncoder)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var cfgCache = concurrent.NewMap()
|
|
|
|
func getFrozenConfigFromCache(cfg Config) *frozenConfig {
|
|
obj, found := cfgCache.Load(cfg)
|
|
if found {
|
|
return obj.(*frozenConfig)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func addFrozenConfigToCache(cfg Config, frozenConfig *frozenConfig) {
|
|
cfgCache.Store(cfg, frozenConfig)
|
|
}
|
|
|
|
// Froze forge API from config
|
|
func (cfg Config) Froze() API {
|
|
api := &frozenConfig{
|
|
sortMapKeys: cfg.SortMapKeys,
|
|
indentionStep: cfg.IndentionStep,
|
|
objectFieldMustBeSimpleString: cfg.ObjectFieldMustBeSimpleString,
|
|
onlyTaggedField: cfg.OnlyTaggedField,
|
|
disallowUnknownFields: cfg.DisallowUnknownFields,
|
|
caseSensitive: cfg.CaseSensitive,
|
|
}
|
|
api.streamPool = &sync.Pool{
|
|
New: func() interface{} {
|
|
return NewStream(api, nil, 512)
|
|
},
|
|
}
|
|
api.iteratorPool = &sync.Pool{
|
|
New: func() interface{} {
|
|
return NewIterator(api)
|
|
},
|
|
}
|
|
api.initCache()
|
|
encoderExtension := EncoderExtension{}
|
|
decoderExtension := DecoderExtension{}
|
|
if cfg.MarshalFloatWith6Digits {
|
|
api.marshalFloatWith6Digits(encoderExtension)
|
|
}
|
|
if cfg.EscapeHTML {
|
|
api.escapeHTML(encoderExtension)
|
|
}
|
|
if cfg.UseNumber {
|
|
api.useNumber(decoderExtension)
|
|
}
|
|
if cfg.ValidateJsonRawMessage {
|
|
api.validateJsonRawMessage(encoderExtension)
|
|
}
|
|
api.encoderExtension = encoderExtension
|
|
api.decoderExtension = decoderExtension
|
|
api.configBeforeFrozen = cfg
|
|
return api
|
|
}
|
|
|
|
func (cfg Config) frozeWithCacheReuse(extraExtensions []Extension) *frozenConfig {
|
|
api := getFrozenConfigFromCache(cfg)
|
|
if api != nil {
|
|
return api
|
|
}
|
|
api = cfg.Froze().(*frozenConfig)
|
|
for _, extension := range extraExtensions {
|
|
api.RegisterExtension(extension)
|
|
}
|
|
addFrozenConfigToCache(cfg, api)
|
|
return api
|
|
}
|
|
|
|
func (cfg *frozenConfig) validateJsonRawMessage(extension EncoderExtension) {
|
|
encoder := &funcEncoder{func(ptr unsafe.Pointer, stream *Stream) {
|
|
rawMessage := *(*json.RawMessage)(ptr)
|
|
iter := cfg.BorrowIterator([]byte(rawMessage))
|
|
defer cfg.ReturnIterator(iter)
|
|
iter.Read()
|
|
if iter.Error != nil && iter.Error != io.EOF {
|
|
stream.WriteRaw("null")
|
|
} else {
|
|
stream.WriteRaw(string(rawMessage))
|
|
}
|
|
}, func(ptr unsafe.Pointer) bool {
|
|
return len(*((*json.RawMessage)(ptr))) == 0
|
|
}}
|
|
extension[reflect2.TypeOfPtr((*json.RawMessage)(nil)).Elem()] = encoder
|
|
extension[reflect2.TypeOfPtr((*RawMessage)(nil)).Elem()] = encoder
|
|
}
|
|
|
|
func (cfg *frozenConfig) useNumber(extension DecoderExtension) {
|
|
extension[reflect2.TypeOfPtr((*interface{})(nil)).Elem()] = &funcDecoder{func(ptr unsafe.Pointer, iter *Iterator) {
|
|
exitingValue := *((*interface{})(ptr))
|
|
if exitingValue != nil && reflect.TypeOf(exitingValue).Kind() == reflect.Ptr {
|
|
iter.ReadVal(exitingValue)
|
|
return
|
|
}
|
|
if iter.WhatIsNext() == NumberValue {
|
|
*((*interface{})(ptr)) = json.Number(iter.readNumberAsString())
|
|
} else {
|
|
*((*interface{})(ptr)) = iter.Read()
|
|
}
|
|
}}
|
|
}
|
|
func (cfg *frozenConfig) getTagKey() string {
|
|
tagKey := cfg.configBeforeFrozen.TagKey
|
|
if tagKey == "" {
|
|
return "json"
|
|
}
|
|
return tagKey
|
|
}
|
|
|
|
func (cfg *frozenConfig) RegisterExtension(extension Extension) {
|
|
cfg.extraExtensions = append(cfg.extraExtensions, extension)
|
|
copied := cfg.configBeforeFrozen
|
|
cfg.configBeforeFrozen = copied
|
|
}
|
|
|
|
type lossyFloat32Encoder struct {
|
|
}
|
|
|
|
func (encoder *lossyFloat32Encoder) Encode(ptr unsafe.Pointer, stream *Stream) {
|
|
stream.WriteFloat32Lossy(*((*float32)(ptr)))
|
|
}
|
|
|
|
func (encoder *lossyFloat32Encoder) IsEmpty(ptr unsafe.Pointer) bool {
|
|
return *((*float32)(ptr)) == 0
|
|
}
|
|
|
|
type lossyFloat64Encoder struct {
|
|
}
|
|
|
|
func (encoder *lossyFloat64Encoder) Encode(ptr unsafe.Pointer, stream *Stream) {
|
|
stream.WriteFloat64Lossy(*((*float64)(ptr)))
|
|
}
|
|
|
|
func (encoder *lossyFloat64Encoder) IsEmpty(ptr unsafe.Pointer) bool {
|
|
return *((*float64)(ptr)) == 0
|
|
}
|
|
|
|
// EnableLossyFloatMarshalling keeps 10**(-6) precision
|
|
// for float variables for better performance.
|
|
func (cfg *frozenConfig) marshalFloatWith6Digits(extension EncoderExtension) {
|
|
// for better performance
|
|
extension[reflect2.TypeOfPtr((*float32)(nil)).Elem()] = &lossyFloat32Encoder{}
|
|
extension[reflect2.TypeOfPtr((*float64)(nil)).Elem()] = &lossyFloat64Encoder{}
|
|
}
|
|
|
|
type htmlEscapedStringEncoder struct {
|
|
}
|
|
|
|
func (encoder *htmlEscapedStringEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
|
|
str := *((*string)(ptr))
|
|
stream.WriteStringWithHTMLEscaped(str)
|
|
}
|
|
|
|
func (encoder *htmlEscapedStringEncoder) IsEmpty(ptr unsafe.Pointer) bool {
|
|
return *((*string)(ptr)) == ""
|
|
}
|
|
|
|
func (cfg *frozenConfig) escapeHTML(encoderExtension EncoderExtension) {
|
|
encoderExtension[reflect2.TypeOfPtr((*string)(nil)).Elem()] = &htmlEscapedStringEncoder{}
|
|
}
|
|
|
|
func (cfg *frozenConfig) cleanDecoders() {
|
|
typeDecoders = map[string]ValDecoder{}
|
|
fieldDecoders = map[string]ValDecoder{}
|
|
*cfg = *(cfg.configBeforeFrozen.Froze().(*frozenConfig))
|
|
}
|
|
|
|
func (cfg *frozenConfig) cleanEncoders() {
|
|
typeEncoders = map[string]ValEncoder{}
|
|
fieldEncoders = map[string]ValEncoder{}
|
|
*cfg = *(cfg.configBeforeFrozen.Froze().(*frozenConfig))
|
|
}
|
|
|
|
func (cfg *frozenConfig) MarshalToString(v interface{}) (string, error) {
|
|
stream := cfg.BorrowStream(nil)
|
|
defer cfg.ReturnStream(stream)
|
|
stream.WriteVal(v)
|
|
if stream.Error != nil {
|
|
return "", stream.Error
|
|
}
|
|
return string(stream.Buffer()), nil
|
|
}
|
|
|
|
func (cfg *frozenConfig) Marshal(v interface{}) ([]byte, error) {
|
|
stream := cfg.BorrowStream(nil)
|
|
defer cfg.ReturnStream(stream)
|
|
stream.WriteVal(v)
|
|
if stream.Error != nil {
|
|
return nil, stream.Error
|
|
}
|
|
result := stream.Buffer()
|
|
copied := make([]byte, len(result))
|
|
copy(copied, result)
|
|
return copied, nil
|
|
}
|
|
|
|
func (cfg *frozenConfig) MarshalIndent(v interface{}, prefix, indent string) ([]byte, error) {
|
|
if prefix != "" {
|
|
panic("prefix is not supported")
|
|
}
|
|
for _, r := range indent {
|
|
if r != ' ' {
|
|
panic("indent can only be space")
|
|
}
|
|
}
|
|
newCfg := cfg.configBeforeFrozen
|
|
newCfg.IndentionStep = len(indent)
|
|
return newCfg.frozeWithCacheReuse(cfg.extraExtensions).Marshal(v)
|
|
}
|
|
|
|
func (cfg *frozenConfig) UnmarshalFromString(str string, v interface{}) error {
|
|
data := []byte(str)
|
|
iter := cfg.BorrowIterator(data)
|
|
defer cfg.ReturnIterator(iter)
|
|
iter.ReadVal(v)
|
|
c := iter.nextToken()
|
|
if c == 0 {
|
|
if iter.Error == io.EOF {
|
|
return nil
|
|
}
|
|
return iter.Error
|
|
}
|
|
iter.ReportError("Unmarshal", "there are bytes left after unmarshal")
|
|
return iter.Error
|
|
}
|
|
|
|
func (cfg *frozenConfig) Get(data []byte, path ...interface{}) Any {
|
|
iter := cfg.BorrowIterator(data)
|
|
defer cfg.ReturnIterator(iter)
|
|
return locatePath(iter, path)
|
|
}
|
|
|
|
func (cfg *frozenConfig) Unmarshal(data []byte, v interface{}) error {
|
|
iter := cfg.BorrowIterator(data)
|
|
defer cfg.ReturnIterator(iter)
|
|
iter.ReadVal(v)
|
|
c := iter.nextToken()
|
|
if c == 0 {
|
|
if iter.Error == io.EOF {
|
|
return nil
|
|
}
|
|
return iter.Error
|
|
}
|
|
iter.ReportError("Unmarshal", "there are bytes left after unmarshal")
|
|
return iter.Error
|
|
}
|
|
|
|
func (cfg *frozenConfig) NewEncoder(writer io.Writer) *Encoder {
|
|
stream := NewStream(cfg, writer, 512)
|
|
return &Encoder{stream}
|
|
}
|
|
|
|
func (cfg *frozenConfig) NewDecoder(reader io.Reader) *Decoder {
|
|
iter := Parse(cfg, reader, 512)
|
|
return &Decoder{iter}
|
|
}
|
|
|
|
func (cfg *frozenConfig) Valid(data []byte) bool {
|
|
iter := cfg.BorrowIterator(data)
|
|
defer cfg.ReturnIterator(iter)
|
|
iter.Skip()
|
|
return iter.Error == nil
|
|
}
|