#54 support sort map keys

WIP: Tests to compare against stdlib

.idea/libraries/Go_SDK.xml

@@ -0,0 +1,10 @@
+<component name="libraryTable">
+  <library name="Go SDK">
+    <CLASSES>
+      <root url="file:///usr/local/go/src" />
+    </CLASSES>
+    <SOURCES>
+      <root url="file:///usr/local/go/src" />
+    </SOURCES>
+  </library>
+</component>

README.md

@@ -2,61 +2,55 @@
 
 jsoniter (json-iterator) is fast and flexible JSON parser available in [Java](https://github.com/json-iterator/java) and [Go](https://github.com/json-iterator/go)
 
-# Why jsoniter?
+# Benchmark
 
-* Jsoniter is the fastest JSON parser. It could be up to 10x faster than normal parser, data binding included. Shameless self [benchmark](http://jsoniter.com/benchmark.html)
-* Extremely flexible api. You can mix and match three different styles: bind-api, any-api or iterator-api. Checkout your [api choices](http://jsoniter.com/api.html)
-* Unique iterator api can iterate through JSON directly, zero memory allocation! See how [iterator](http://jsoniter.com/api.html#iterator-api) works
+![benchmark](http://jsoniter.com/benchmarks/go-benchmark.png)
 
-# Show off
+Source code: https://github.com/json-iterator/go-benchmark/blob/master/src/github.com/json-iterator/go-benchmark/benchmark_medium_payload_test.go
 
-Here is a quick show off, for more complete report you can checkout the full [benchmark](http://jsoniter.com/benchmark.html) with [in-depth optimization](http://jsoniter.com/benchmark.html#optimization-used) to back the numbers up
+Raw Result (easyjson requires static code generation)
 
-![go-medium](http://jsoniter.com/benchmarks/go-medium.png)
+| | ns/op | allocation bytes | allocation times |
+| --- | --- | --- | --- |
+| std decode | 35510 ns/op | 1960 B/op | 99 allocs/op |
+| easyjson decode | 8499 ns/op | 160 B/op | 4 allocs/op |
+| jsoniter decode | 5623 ns/op | 160 B/op | 3 allocs/op |
+| std encode | 2213 ns/op | 712 B/op | 5 allocs/op |
+| easyjson encode | 883 ns/op | 576 B/op | 3 allocs/op |
+| jsoniter encode | 837 ns/op | 384 B/op | 4 allocs/op |
 
-# Bind-API is the best
+# Usage
 
-Bind-api should always be the first choice. Given this JSON document `[0,1,2,3]`
+100% compatibility with standard lib
 
-Parse with Go bind-api
+Replace
+
+```go
+import "encoding/json"
+json.Marshal(&data)
+```
+
+with 
 
 ```go
 import "github.com/json-iterator/go"
-iter := jsoniter.ParseString(`[0,1,2,3]`)
-var := iter.Read()
-fmt.Println(val)
+jsoniter.Marshal(&data)
 ```
 
-# Iterator-API for quick extraction
+Replace
 
-When you do not need to get all the data back, just extract some.
+```go
+import "encoding/json"
+json.Unmarshal(input, &data)
+```
 
-Parse with Go iterator-api
+with
 
 ```go
 import "github.com/json-iterator/go"
-iter := ParseString(`[0, [1, 2], [3, 4], 5]`)
-count := 0
-for iter.ReadArray() {
-    iter.Skip()
-    count++
-}
-fmt.Println(count) // 4
+jsoniter.Unmarshal(input, &data)
 ```
 
-# Any-API for maximum flexibility
-
-Parse with Go any-api
-
-```go
-import "github.com/json-iterator/go"
-iter := jsoniter.ParseString(`[{"field1":"11","field2":"12"},{"field1":"21","field2":"22"}]`)
-val := iter.ReadAny()
-fmt.Println(val.ToInt(1, "field2")) // 22
-```
-
-Notice you can extract from nested data structure, and convert any type to the type to you want.
-
 # How to get
 
 ```

assert/assertions.go

@@ -1014,4 +1014,4 @@ func typeAndKind(v interface{}) (reflect.Type, reflect.Kind) {
 		k = t.Kind()
 	}
 	return t, k
-}
+}

example_test.go

@@ -0,0 +1,47 @@
+package jsoniter_test
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/json-iterator/go"
+)
+
+func ExampleMarshal() {
+	type ColorGroup struct {
+		ID     int
+		Name   string
+		Colors []string
+	}
+	group := ColorGroup{
+		ID:     1,
+		Name:   "Reds",
+		Colors: []string{"Crimson", "Red", "Ruby", "Maroon"},
+	}
+	b, err := jsoniter.Marshal(group)
+	if err != nil {
+		fmt.Println("error:", err)
+	}
+	os.Stdout.Write(b)
+	// Output:
+	// {"ID":1,"Name":"Reds","Colors":["Crimson","Red","Ruby","Maroon"]}
+}
+
+func ExampleUnmarshal() {
+	var jsonBlob = []byte(`[
+		{"Name": "Platypus", "Order": "Monotremata"},
+		{"Name": "Quoll",    "Order": "Dasyuromorphia"}
+	]`)
+	type Animal struct {
+		Name  string
+		Order string
+	}
+	var animals []Animal
+	err := jsoniter.Unmarshal(jsonBlob, &animals)
+	if err != nil {
+		fmt.Println("error:", err)
+	}
+	fmt.Printf("%+v", animals)
+	// Output:
+	// [{Name:Platypus Order:Monotremata} {Name:Quoll Order:Dasyuromorphia}]
+}

feature_adapter.go

@@ -1,88 +1,129 @@
+// Package jsoniter implements encoding and decoding of JSON as defined in
+// RFC 4627 and provides interfaces with identical syntax of standard lib encoding/json.
+// Converting from encoding/json to jsoniter is no more than replacing the package with jsoniter
+// and variable type declarations (if any).
+// jsoniter interfaces gives 100% compatibility with code using standard lib.
+//
+// "JSON and Go"
+// (https://golang.org/doc/articles/json_and_go.html)
+// gives a description of how Marshal/Unmarshal operate
+// between arbitrary or predefined json objects and bytes,
+// and it applies to jsoniter.Marshal/Unmarshal as well.
 package jsoniter
 
 import (
-	"io"
 	"bytes"
+	"encoding/json"
+	"io"
+	"unsafe"
 )
 
-// Unmarshal adapts to json/encoding APIs
+// Unmarshal adapts to json/encoding Unmarshal API
+//
+// Unmarshal parses the JSON-encoded data and stores the result in the value pointed to by v.
+// Refer to https://godoc.org/encoding/json#Unmarshal for more information
 func Unmarshal(data []byte, v interface{}) error {
-	iter := ParseBytes(data)
-	iter.ReadVal(v)
-	if iter.head == iter.tail {
-		iter.loadMore()
-	}
-	if iter.Error == io.EOF {
-		return nil
-	}
-	if iter.Error == nil {
-		iter.reportError("Unmarshal", "there are bytes left after unmarshal")
-	}
-	return iter.Error
+	return ConfigOfDefault.Unmarshal(data, v)
 }
 
+// UnmarshalAny adapts to
 func UnmarshalAny(data []byte) (Any, error) {
-	iter := ParseBytes(data)
-	any := iter.ReadAny()
-	if iter.head == iter.tail {
-		iter.loadMore()
+	return ConfigOfDefault.UnmarshalAny(data)
+}
+
+func lastNotSpacePos(data []byte) int {
+	for i := len(data) - 1; i >= 0; i-- {
+		if data[i] != ' ' && data[i] != '\t' && data[i] != '\r' && data[i] != '\n' {
+			return i + 1
+		}
 	}
-	if iter.Error == io.EOF {
-		return any, nil
-	}
-	if iter.Error == nil {
-		iter.reportError("UnmarshalAny", "there are bytes left after unmarshal")
-	}
-	return any, iter.Error
+	return 0
 }
 
 func UnmarshalFromString(str string, v interface{}) error {
-	data := []byte(str)
-	iter := ParseBytes(data)
-	iter.ReadVal(v)
-	if iter.head == iter.tail {
-		iter.loadMore()
-	}
-	if iter.Error == io.EOF {
-		return nil
-	}
-	if iter.Error == nil {
-		iter.reportError("UnmarshalFromString", "there are bytes left after unmarshal")
-	}
-	return iter.Error
+	return ConfigOfDefault.UnmarshalFromString(str, v)
 }
 
 func UnmarshalAnyFromString(str string) (Any, error) {
-	data := []byte(str)
-	iter := ParseBytes(data)
-	any := iter.ReadAny()
-	if iter.head == iter.tail {
-		iter.loadMore()
-	}
-	if iter.Error == io.EOF {
-		return any, nil
-	}
-	if iter.Error == nil {
-		iter.reportError("UnmarshalAnyFromString", "there are bytes left after unmarshal")
-	}
-	return nil, iter.Error
+	return ConfigOfDefault.UnmarshalAnyFromString(str)
 }
 
+// Marshal adapts to json/encoding Marshal API
+//
+// Marshal returns the JSON encoding of v, adapts to json/encoding Marshal API
+// Refer to https://godoc.org/encoding/json#Marshal for more information
 func Marshal(v interface{}) ([]byte, error) {
-	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 4096)
-	stream.WriteVal(v)
-	stream.Flush()
-	if stream.Error != nil {
-		return nil, stream.Error
-	}
-	return buf.Bytes(), nil
+	return ConfigOfDefault.Marshal(v)
 }
 
 func MarshalToString(v interface{}) (string, error) {
-	buf, err := Marshal(v)
-	if err != nil {
-		return "", err
+	return ConfigOfDefault.MarshalToString(v)
+}
+
+// NewDecoder adapts to json/stream NewDecoder API.
+//
+// NewDecoder returns a new decoder that reads from r.
+//
+// Instead of a json/encoding Decoder, an AdaptedDecoder is returned
+// Refer to https://godoc.org/encoding/json#NewDecoder for more information
+func NewDecoder(reader io.Reader) *AdaptedDecoder {
+	return ConfigOfDefault.NewDecoder(reader)
+}
+
+// AdaptedDecoder reads and decodes JSON values from an input stream.
+// AdaptedDecoder provides identical APIs with json/stream Decoder (Token() and UseNumber() are in progress)
+type AdaptedDecoder struct {
+	iter *Iterator
+}
+
+func (adapter *AdaptedDecoder) Decode(obj interface{}) error {
+	adapter.iter.ReadVal(obj)
+	err := adapter.iter.Error
+	if err == io.EOF {
+		return nil
 	}
-	return string(buf), nil
-}
+	return adapter.iter.Error
+}
+
+func (adapter *AdaptedDecoder) More() bool {
+	return adapter.iter.head != adapter.iter.tail
+}
+
+func (adapter *AdaptedDecoder) Buffered() io.Reader {
+	remaining := adapter.iter.buf[adapter.iter.head:adapter.iter.tail]
+	return bytes.NewReader(remaining)
+}
+
+func (decoder *AdaptedDecoder) UseNumber() {
+	RegisterTypeDecoder("interface {}", func(ptr unsafe.Pointer, iter *Iterator) {
+		if iter.WhatIsNext() == Number {
+			*((*interface{})(ptr)) = json.Number(iter.readNumberAsString())
+		} else {
+			*((*interface{})(ptr)) = iter.Read()
+		}
+	})
+}
+
+func NewEncoder(writer io.Writer) *AdaptedEncoder {
+	return ConfigOfDefault.NewEncoder(writer)
+}
+
+type AdaptedEncoder struct {
+	stream *Stream
+}
+
+func (adapter *AdaptedEncoder) Encode(val interface{}) error {
+	adapter.stream.WriteVal(val)
+	adapter.stream.Flush()
+	return adapter.stream.Error
+}
+
+func (adapter *AdaptedEncoder) SetIndent(prefix, indent string) {
+	adapter.stream.cfg.indentionStep = len(indent)
+}
+
+func (adapter *AdaptedEncoder) SetEscapeHTML(escapeHtml bool) {
+	config := adapter.stream.cfg.configBeforeFrozen
+	config.EscapeHtml = escapeHtml
+	adapter.stream.cfg = config.Froze()
+}

feature_any.go

@@ -98,6 +98,10 @@ func Wrap(val interface{}) Any {
 	if val == nil {
 		return &nilAny{}
 	}
+	asAny, isAny := val.(Any)
+	if isAny {
+		return asAny
+	}
 	type_ := reflect.TypeOf(val)
 	switch type_.Kind() {
 	case reflect.Slice:

feature_any_array.go

@@ -1,9 +1,9 @@
 package jsoniter
 
 import (
-	"unsafe"
 	"fmt"
 	"reflect"
+	"unsafe"
 )
 
 type arrayLazyAny struct {
@@ -22,7 +22,7 @@ func (any *arrayLazyAny) ValueType() ValueType {
 func (any *arrayLazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator()
+		iter = NewIterator(ConfigOfDefault)
 		any.iter = iter
 	}
 	iter.ResetBytes(any.remaining)
@@ -44,7 +44,7 @@ func (any *arrayLazyAny) fillCacheUntil(target int) Any {
 		return any.cache[target]
 	}
 	iter := any.Parse()
-	if (len(any.remaining) == len(any.buf)) {
+	if len(any.remaining) == len(any.buf) {
 		iter.head++
 		c := iter.nextToken()
 		if c != ']' {
@@ -287,7 +287,7 @@ func (any *arrayLazyAny) IterateArray() (func() (Any, bool), bool) {
 			// read from buffer
 			iter := any.iter
 			if iter == nil {
-				iter = NewIterator()
+				iter = NewIterator(ConfigOfDefault)
 				any.iter = iter
 			}
 			iter.ResetBytes(remaining)
@@ -337,9 +337,9 @@ func (any *arrayLazyAny) GetInterface() interface{} {
 
 type arrayAny struct {
 	baseAny
-	err      error
-	cache    []Any
-	val      reflect.Value
+	err   error
+	cache []Any
+	val   reflect.Value
 }
 
 func wrapArray(val interface{}) *arrayAny {
@@ -536,4 +536,4 @@ func (any *arrayAny) WriteTo(stream *Stream) {
 func (any *arrayAny) GetInterface() interface{} {
 	any.fillCache()
 	return any.cache
-}
+}

feature_any_float.go

@@ -2,22 +2,22 @@ package jsoniter
 
 import (
 	"io"
-	"unsafe"
 	"strconv"
+	"unsafe"
 )
 
 type float64LazyAny struct {
 	baseAny
-	buf []byte
-	iter *Iterator
-	err error
+	buf   []byte
+	iter  *Iterator
+	err   error
 	cache float64
 }
 
 func (any *float64LazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator()
+		iter = NewIterator(ConfigOfDefault)
 	}
 	iter.ResetBytes(any.buf)
 	return iter
@@ -163,4 +163,4 @@ func (any *floatAny) WriteTo(stream *Stream) {
 
 func (any *floatAny) GetInterface() interface{} {
 	return any.val
-}
+}

feature_any_int32.go

@@ -67,4 +67,4 @@ func (any *int32Any) Parse() *Iterator {
 
 func (any *int32Any) GetInterface() interface{} {
 	return any.val
-}
+}

feature_any_int64.go

@@ -2,8 +2,8 @@ package jsoniter
 
 import (
 	"io"
-	"unsafe"
 	"strconv"
+	"unsafe"
 )
 
 type int64LazyAny struct {
@@ -21,7 +21,7 @@ func (any *int64LazyAny) ValueType() ValueType {
 func (any *int64LazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator()
+		iter = NewIterator(ConfigOfDefault)
 	}
 	iter.ResetBytes(any.buf)
 	return iter
@@ -163,4 +163,4 @@ func (any *int64Any) Parse() *Iterator {
 
 func (any *int64Any) GetInterface() interface{} {
 	return any.val
-}
+}

feature_any_nil.go

@@ -62,4 +62,4 @@ func (any *nilAny) Parse() *Iterator {
 
 func (any *nilAny) GetInterface() interface{} {
 	return nil
-}
+}

feature_any_object.go

@@ -1,9 +1,9 @@
 package jsoniter
 
 import (
-	"unsafe"
 	"fmt"
 	"reflect"
+	"unsafe"
 )
 
 type objectLazyAny struct {
@@ -22,7 +22,7 @@ func (any *objectLazyAny) ValueType() ValueType {
 func (any *objectLazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator()
+		iter = NewIterator(ConfigOfDefault)
 		any.iter = iter
 	}
 	iter.ResetBytes(any.remaining)
@@ -308,7 +308,7 @@ func (any *objectLazyAny) IterateObject() (func() (string, Any, bool), bool) {
 			// read from buffer
 			iter := any.iter
 			if iter == nil {
-				iter = NewIterator()
+				iter = NewIterator(ConfigOfDefault)
 				any.iter = iter
 			}
 			iter.ResetBytes(remaining)
@@ -322,6 +322,7 @@ func (any *objectLazyAny) IterateObject() (func() (string, Any, bool), bool) {
 				any.err = iter.Error
 				return key, value, true
 			} else {
+				nextKey = ""
 				remaining = nil
 				any.remaining = nil
 				any.err = iter.Error

feature_any_string.go

@@ -5,7 +5,7 @@ import (
 	"strconv"
 )
 
-type stringLazyAny struct{
+type stringLazyAny struct {
 	baseAny
 	buf   []byte
 	iter  *Iterator
@@ -20,7 +20,7 @@ func (any *stringLazyAny) ValueType() ValueType {
 func (any *stringLazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator()
+		iter = NewIterator(ConfigOfDefault)
 		any.iter = iter
 	}
 	iter.ResetBytes(any.buf)
@@ -136,9 +136,9 @@ func (any *stringLazyAny) GetInterface() interface{} {
 	return any.cache
 }
 
-type stringAny struct{
+type stringAny struct {
 	baseAny
-	err   error
+	err error
 	val string
 }
 
@@ -146,7 +146,6 @@ func (any *stringAny) Parse() *Iterator {
 	return nil
 }
 
-
 func (any *stringAny) ValueType() ValueType {
 	return String
 }
@@ -228,4 +227,4 @@ func (any *stringAny) WriteTo(stream *Stream) {
 
 func (any *stringAny) GetInterface() interface{} {
 	return any.val
-}
+}

feature_any_uint64.go

@@ -1,12 +1,11 @@
 package jsoniter
 
 import (
+	"io"
 	"strconv"
 	"unsafe"
-	"io"
 )
 
-
 type uint64LazyAny struct {
 	baseAny
 	buf   []byte
@@ -22,7 +21,7 @@ func (any *uint64LazyAny) ValueType() ValueType {
 func (any *uint64LazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator()
+		iter = NewIterator(ConfigOfDefault)
 	}
 	iter.ResetBytes(any.buf)
 	return iter
@@ -164,4 +163,4 @@ func (any *uint64Any) Parse() *Iterator {
 
 func (any *uint64Any) GetInterface() interface{} {
 	return any.val
-}
+}

feature_config.go

@@ -0,0 +1,239 @@
+package jsoniter
+
+import (
+	"io"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+	"errors"
+)
+
+type Config struct {
+	IndentionStep                 int
+	MarshalFloatWith6Digits       bool
+	SupportUnexportedStructFields bool
+	EscapeHtml                    bool
+	SortMapKeys                   bool
+}
+
+type frozenConfig struct {
+	configBeforeFrozen Config
+	sortMapKeys        bool
+	indentionStep      int
+	decoderCache       unsafe.Pointer
+	encoderCache       unsafe.Pointer
+	extensions         []ExtensionFunc
+}
+
+var ConfigOfDefault = Config{}.Froze()
+
+// Trying to be 100% compatible with standard library behavior
+var ConfigCompatibleWithStandardLibrary = Config{
+	EscapeHtml:  true,
+	SortMapKeys: true,
+}.Froze()
+
+func (cfg Config) Froze() *frozenConfig {
+	frozenConfig := &frozenConfig{
+		sortMapKeys: cfg.SortMapKeys,
+		indentionStep: cfg.IndentionStep,
+	}
+	atomic.StorePointer(&frozenConfig.decoderCache, unsafe.Pointer(&map[string]Decoder{}))
+	atomic.StorePointer(&frozenConfig.encoderCache, unsafe.Pointer(&map[string]Encoder{}))
+	if cfg.MarshalFloatWith6Digits {
+		frozenConfig.marshalFloatWith6Digits()
+	}
+	if cfg.SupportUnexportedStructFields {
+		frozenConfig.supportUnexportedStructFields()
+	}
+	if cfg.EscapeHtml {
+		frozenConfig.escapeHtml()
+	}
+	frozenConfig.configBeforeFrozen = cfg
+	return frozenConfig
+}
+
+// RegisterExtension can register a custom extension
+func (cfg *frozenConfig) registerExtension(extension ExtensionFunc) {
+	cfg.extensions = append(cfg.extensions, extension)
+}
+
+func (cfg *frozenConfig) supportUnexportedStructFields() {
+	cfg.registerExtension(func(type_ reflect.Type, field *reflect.StructField) ([]string, EncoderFunc, DecoderFunc) {
+		return []string{field.Name}, nil, nil
+	})
+}
+
+// EnableLossyFloatMarshalling keeps 10**(-6) precision
+// for float variables for better performance.
+func (cfg *frozenConfig) marshalFloatWith6Digits() {
+	// for better performance
+	cfg.addEncoderToCache(reflect.TypeOf((*float32)(nil)).Elem(), &funcEncoder{func(ptr unsafe.Pointer, stream *Stream) {
+		val := *((*float32)(ptr))
+		stream.WriteFloat32Lossy(val)
+	}})
+	cfg.addEncoderToCache(reflect.TypeOf((*float64)(nil)).Elem(), &funcEncoder{func(ptr unsafe.Pointer, stream *Stream) {
+		val := *((*float64)(ptr))
+		stream.WriteFloat64Lossy(val)
+	}})
+}
+
+func (cfg *frozenConfig) escapeHtml() {
+	// for better performance
+	cfg.addEncoderToCache(reflect.TypeOf((*string)(nil)).Elem(), &funcEncoder{func(ptr unsafe.Pointer, stream *Stream) {
+		val := *((*string)(ptr))
+		stream.WriteStringWithHtmlEscaped(val)
+	}})
+}
+
+func (cfg *frozenConfig) addDecoderToCache(cacheKey reflect.Type, decoder Decoder) {
+	done := false
+	for !done {
+		ptr := atomic.LoadPointer(&cfg.decoderCache)
+		cache := *(*map[reflect.Type]Decoder)(ptr)
+		copied := map[reflect.Type]Decoder{}
+		for k, v := range cache {
+			copied[k] = v
+		}
+		copied[cacheKey] = decoder
+		done = atomic.CompareAndSwapPointer(&cfg.decoderCache, ptr, unsafe.Pointer(&copied))
+	}
+}
+
+func (cfg *frozenConfig) addEncoderToCache(cacheKey reflect.Type, encoder Encoder) {
+	done := false
+	for !done {
+		ptr := atomic.LoadPointer(&cfg.encoderCache)
+		cache := *(*map[reflect.Type]Encoder)(ptr)
+		copied := map[reflect.Type]Encoder{}
+		for k, v := range cache {
+			copied[k] = v
+		}
+		copied[cacheKey] = encoder
+		done = atomic.CompareAndSwapPointer(&cfg.encoderCache, ptr, unsafe.Pointer(&copied))
+	}
+}
+
+func (cfg *frozenConfig) getDecoderFromCache(cacheKey reflect.Type) Decoder {
+	ptr := atomic.LoadPointer(&cfg.decoderCache)
+	cache := *(*map[reflect.Type]Decoder)(ptr)
+	return cache[cacheKey]
+}
+
+func (cfg *frozenConfig) getEncoderFromCache(cacheKey reflect.Type) Encoder {
+	ptr := atomic.LoadPointer(&cfg.encoderCache)
+	cache := *(*map[reflect.Type]Encoder)(ptr)
+	return cache[cacheKey]
+}
+
+// CleanDecoders cleans decoders registered or cached
+func (cfg *frozenConfig) CleanDecoders() {
+	typeDecoders = map[string]Decoder{}
+	fieldDecoders = map[string]Decoder{}
+	atomic.StorePointer(&cfg.decoderCache, unsafe.Pointer(&map[string]Decoder{}))
+}
+
+// CleanEncoders cleans encoders registered or cached
+func (cfg *frozenConfig) CleanEncoders() {
+	typeEncoders = map[string]Encoder{}
+	fieldEncoders = map[string]Encoder{}
+	atomic.StorePointer(&cfg.encoderCache, unsafe.Pointer(&map[string]Encoder{}))
+}
+
+func (cfg *frozenConfig) MarshalToString(v interface{}) (string, error) {
+	buf, err := cfg.Marshal(v)
+	if err != nil {
+		return "", err
+	}
+	return string(buf), nil
+}
+
+func (cfg *frozenConfig) Marshal(v interface{}) ([]byte, error) {
+	stream := NewStream(cfg, nil, 256)
+	stream.WriteVal(v)
+	if stream.Error != nil {
+		return nil, stream.Error
+	}
+	return stream.Buffer(), nil
+}
+
+func (cfg *frozenConfig) UnmarshalFromString(str string, v interface{}) error {
+	data := []byte(str)
+	data = data[:lastNotSpacePos(data)]
+	iter := ParseBytes(cfg, data)
+	iter.ReadVal(v)
+	if iter.head == iter.tail {
+		iter.loadMore()
+	}
+	if iter.Error == io.EOF {
+		return nil
+	}
+	if iter.Error == nil {
+		iter.reportError("UnmarshalFromString", "there are bytes left after unmarshal")
+	}
+	return iter.Error
+}
+
+func (cfg *frozenConfig) NewEncoder(writer io.Writer) *AdaptedEncoder {
+	stream := NewStream(cfg, writer, 512)
+	return &AdaptedEncoder{stream}
+}
+
+func (cfg *frozenConfig) NewDecoder(reader io.Reader) *AdaptedDecoder {
+	iter := Parse(cfg, reader, 512)
+	return &AdaptedDecoder{iter}
+}
+
+func (cfg *frozenConfig) UnmarshalAnyFromString(str string) (Any, error) {
+	data := []byte(str)
+	data = data[:lastNotSpacePos(data)]
+	iter := ParseBytes(cfg, data)
+	any := iter.ReadAny()
+	if iter.head == iter.tail {
+		iter.loadMore()
+	}
+	if iter.Error == io.EOF {
+		return any, nil
+	}
+	if iter.Error == nil {
+		iter.reportError("UnmarshalAnyFromString", "there are bytes left after unmarshal")
+	}
+	return nil, iter.Error
+}
+
+func (cfg *frozenConfig) UnmarshalAny(data []byte) (Any, error) {
+	data = data[:lastNotSpacePos(data)]
+	iter := ParseBytes(cfg, data)
+	any := iter.ReadAny()
+	if iter.head == iter.tail {
+		iter.loadMore()
+	}
+	if iter.Error == io.EOF {
+		return any, nil
+	}
+	if iter.Error == nil {
+		iter.reportError("UnmarshalAny", "there are bytes left after unmarshal")
+	}
+	return any, iter.Error
+}
+
+func (cfg *frozenConfig) Unmarshal(data []byte, v interface{}) error {
+	data = data[:lastNotSpacePos(data)]
+	iter := ParseBytes(cfg, data)
+	typ := reflect.TypeOf(v)
+	if typ.Kind() != reflect.Ptr {
+		// return non-pointer error
+		return errors.New("the second param must be ptr type")
+	}
+	iter.ReadVal(v)
+	if iter.head == iter.tail {
+		iter.loadMore()
+	}
+	if iter.Error == io.EOF {
+		return nil
+	}
+	if iter.Error == nil {
+		iter.reportError("Unmarshal", "there are bytes left after unmarshal")
+	}
+	return iter.Error
+}

feature_iter.go

@@ -1,3 +1,9 @@
+//
+// Besides, jsoniter.Iterator provides a different set of interfaces
+// iterating given bytes/string/reader
+// and yielding parsed elements one by one.
+// This set of interfaces reads input as required and gives
+// better performance.
 package jsoniter
 
 import (
@@ -60,6 +66,7 @@ func init() {
 
 // Iterator is a fast and flexible JSON parser
 type Iterator struct {
+	cfg    *frozenConfig
 	reader io.Reader
 	buf    []byte
 	head   int
@@ -68,8 +75,9 @@ type Iterator struct {
 }
 
 // Create creates an empty Iterator instance
-func NewIterator() *Iterator {
+func NewIterator(cfg *frozenConfig) *Iterator {
 	return &Iterator{
+		cfg:    cfg,
 		reader: nil,
 		buf:    nil,
 		head:   0,
@@ -78,8 +86,9 @@ func NewIterator() *Iterator {
 }
 
 // Parse parses a json buffer in io.Reader into an Iterator instance
-func Parse(reader io.Reader, bufSize int) *Iterator {
+func Parse(cfg *frozenConfig, reader io.Reader, bufSize int) *Iterator {
 	return &Iterator{
+		cfg:    cfg,
 		reader: reader,
 		buf:    make([]byte, bufSize),
 		head:   0,
@@ -88,8 +97,9 @@ func Parse(reader io.Reader, bufSize int) *Iterator {
 }
 
 // ParseBytes parses a json byte slice into an Iterator instance
-func ParseBytes(input []byte) *Iterator {
+func ParseBytes(cfg *frozenConfig, input []byte) *Iterator {
 	return &Iterator{
+		cfg:    cfg,
 		reader: nil,
 		buf:    input,
 		head:   0,
@@ -98,8 +108,8 @@ func ParseBytes(input []byte) *Iterator {
 }
 
 // ParseString parses a json string into an Iterator instance
-func ParseString(input string) *Iterator {
-	return ParseBytes([]byte(input))
+func ParseString(cfg *frozenConfig, input string) *Iterator {
+	return ParseBytes(cfg, []byte(input))
 }
 
 // Reset can reset an Iterator instance for another json buffer in io.Reader
@@ -276,4 +286,3 @@ func (iter *Iterator) ReadBase64() (ret []byte) {
 	}
 	return ret[:n]
 }
-

feature_iter_array.go

@@ -18,12 +18,11 @@ func (iter *Iterator) ReadArray() (ret bool) {
 	case ',':
 		return true
 	default:
-		iter.reportError("ReadArray", "expect [ or , or ] or n, but found: " + string([]byte{c}))
+		iter.reportError("ReadArray", "expect [ or , or ] or n, but found: "+string([]byte{c}))
 		return
 	}
 }
 
-
 func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
 	c := iter.nextToken()
 	if c == '[' {
@@ -46,6 +45,6 @@ func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
 		iter.skipFixedBytes(3)
 		return true // null
 	}
-	iter.reportError("ReadArrayCB", "expect [ or n, but found: " + string([]byte{c}))
+	iter.reportError("ReadArrayCB", "expect [ or n, but found: "+string([]byte{c}))
 	return false
-}
+}

feature_iter_float.go

@@ -2,11 +2,13 @@ package jsoniter
 
 import (
 	"io"
+	"math/big"
 	"strconv"
 	"unsafe"
 )
 
 var floatDigits []int8
+
 const invalidCharForNumber = int8(-1)
 const endOfNumber = int8(-2)
 const dotInNumber = int8(-3)
@@ -19,11 +21,45 @@ func init() {
 	for i := int8('0'); i <= int8('9'); i++ {
 		floatDigits[i] = i - int8('0')
 	}
-	floatDigits[','] = endOfNumber;
-	floatDigits[']'] = endOfNumber;
-	floatDigits['}'] = endOfNumber;
-	floatDigits[' '] = endOfNumber;
-	floatDigits['.'] = dotInNumber;
+	floatDigits[','] = endOfNumber
+	floatDigits[']'] = endOfNumber
+	floatDigits['}'] = endOfNumber
+	floatDigits[' '] = endOfNumber
+	floatDigits['\t'] = endOfNumber
+	floatDigits['\n'] = endOfNumber
+	floatDigits['.'] = dotInNumber
+}
+
+func (iter *Iterator) ReadBigFloat() (ret *big.Float) {
+	str := iter.readNumberAsString()
+	if iter.Error != nil && iter.Error != io.EOF {
+		return nil
+	}
+	prec := 64
+	if len(str) > prec {
+		prec = len(str)
+	}
+	val, _, err := big.ParseFloat(str, 10, uint(prec), big.ToZero)
+	if err != nil {
+		iter.Error = err
+		return nil
+	}
+	return val
+}
+
+func (iter *Iterator) ReadBigInt() (ret *big.Int) {
+	str := iter.readNumberAsString()
+	if iter.Error != nil && iter.Error != io.EOF {
+		return nil
+	}
+	ret = big.NewInt(0)
+	var success bool
+	ret, success = ret.SetString(str, 10)
+	if !success {
+		iter.reportError("ReadBigInt", "invalid big int")
+		return nil
+	}
+	return ret
 }
 
 func (iter *Iterator) ReadFloat32() (ret float32) {
@@ -40,7 +76,7 @@ func (iter *Iterator) readPositiveFloat32() (ret float32) {
 	value := uint64(0)
 	c := byte(' ')
 	i := iter.head
-	non_decimal_loop:
+non_decimal_loop:
 	for ; i < iter.tail; i++ {
 		c = iter.buf[i]
 		ind := floatDigits[c]
@@ -56,22 +92,22 @@ func (iter *Iterator) readPositiveFloat32() (ret float32) {
 		if value > uint64SafeToMultiple10 {
 			return iter.readFloat32SlowPath()
 		}
-		value = (value << 3) + (value << 1) + uint64(ind); // value = value * 10 + ind;
+		value = (value << 3) + (value << 1) + uint64(ind) // value = value * 10 + ind;
 	}
 	if c == '.' {
 		i++
-		decimalPlaces := 0;
+		decimalPlaces := 0
 		for ; i < iter.tail; i++ {
 			c = iter.buf[i]
-			ind := floatDigits[c];
+			ind := floatDigits[c]
 			switch ind {
 			case endOfNumber:
-				if decimalPlaces > 0 && decimalPlaces < len(POW10) {
+				if decimalPlaces > 0 && decimalPlaces < len(_POW10) {
 					iter.head = i
-					return float32(float64(value) / float64(POW10[decimalPlaces]))
+					return float32(float64(value) / float64(_POW10[decimalPlaces]))
 				}
 				// too many decimal places
-			return iter.readFloat32SlowPath()
+				return iter.readFloat32SlowPath()
 			case invalidCharForNumber:
 				fallthrough
 			case dotInNumber:
@@ -87,10 +123,10 @@ func (iter *Iterator) readPositiveFloat32() (ret float32) {
 	return iter.readFloat32SlowPath()
 }
 
-func (iter *Iterator) readFloat32SlowPath() (ret float32) {
+func (iter *Iterator) readNumberAsString() (ret string) {
 	strBuf := [16]byte{}
 	str := strBuf[0:0]
-	load_loop:
+load_loop:
 	for {
 		for i := iter.head; i < iter.tail; i++ {
 			c := iter.buf[i]
@@ -99,6 +135,7 @@ func (iter *Iterator) readFloat32SlowPath() (ret float32) {
 				str = append(str, c)
 				continue
 			default:
+				iter.head = i
 				break load_loop
 			}
 		}
@@ -109,7 +146,18 @@ func (iter *Iterator) readFloat32SlowPath() (ret float32) {
 	if iter.Error != nil && iter.Error != io.EOF {
 		return
 	}
-	val, err := strconv.ParseFloat(*(*string)(unsafe.Pointer(&str)), 32)
+	if len(str) == 0 {
+		iter.reportError("readNumberAsString", "invalid number")
+	}
+	return *(*string)(unsafe.Pointer(&str))
+}
+
+func (iter *Iterator) readFloat32SlowPath() (ret float32) {
+	str := iter.readNumberAsString()
+	if iter.Error != nil && iter.Error != io.EOF {
+		return
+	}
+	val, err := strconv.ParseFloat(str, 32)
 	if err != nil {
 		iter.Error = err
 		return
@@ -131,7 +179,7 @@ func (iter *Iterator) readPositiveFloat64() (ret float64) {
 	value := uint64(0)
 	c := byte(' ')
 	i := iter.head
-	non_decimal_loop:
+non_decimal_loop:
 	for ; i < iter.tail; i++ {
 		c = iter.buf[i]
 		ind := floatDigits[c]
@@ -147,19 +195,19 @@ func (iter *Iterator) readPositiveFloat64() (ret float64) {
 		if value > uint64SafeToMultiple10 {
 			return iter.readFloat64SlowPath()
 		}
-		value = (value << 3) + (value << 1) + uint64(ind); // value = value * 10 + ind;
+		value = (value << 3) + (value << 1) + uint64(ind) // value = value * 10 + ind;
 	}
 	if c == '.' {
 		i++
-		decimalPlaces := 0;
+		decimalPlaces := 0
 		for ; i < iter.tail; i++ {
 			c = iter.buf[i]
-			ind := floatDigits[c];
+			ind := floatDigits[c]
 			switch ind {
 			case endOfNumber:
-				if decimalPlaces > 0 && decimalPlaces < len(POW10) {
+				if decimalPlaces > 0 && decimalPlaces < len(_POW10) {
 					iter.head = i
-					return float64(value) / float64(POW10[decimalPlaces])
+					return float64(value) / float64(_POW10[decimalPlaces])
 				}
 				// too many decimal places
 				return iter.readFloat64SlowPath()
@@ -179,28 +227,11 @@ func (iter *Iterator) readPositiveFloat64() (ret float64) {
 }
 
 func (iter *Iterator) readFloat64SlowPath() (ret float64) {
-	strBuf := [16]byte{}
-	str := strBuf[0:0]
-	load_loop:
-	for {
-		for i := iter.head; i < iter.tail; i++ {
-			c := iter.buf[i]
-			switch c {
-			case '-', '.', 'e', 'E', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
-				str = append(str, c)
-				continue
-			default:
-				break load_loop
-			}
-		}
-		if !iter.loadMore() {
-			break
-		}
-	}
+	str := iter.readNumberAsString()
 	if iter.Error != nil && iter.Error != io.EOF {
 		return
 	}
-	val, err := strconv.ParseFloat(*(*string)(unsafe.Pointer(&str)), 64)
+	val, err := strconv.ParseFloat(str, 64)
 	if err != nil {
 		iter.Error = err
 		return

feature_iter_int.go

@@ -6,8 +6,8 @@ import (
 
 var intDigits []int8
 
-const uint32SafeToMultiply10 = uint32(0xffffffff) / 10 - 1
-const uint64SafeToMultiple10 = uint64(0xffffffffffffffff) / 10 - 1
+const uint32SafeToMultiply10 = uint32(0xffffffff)/10 - 1
+const uint64SafeToMultiple10 = uint64(0xffffffffffffffff)/10 - 1
 const int64Max = uint64(0x7fffffffffffffff)
 const int32Max = uint32(0x7fffffff)
 const int16Max = uint32(0x7fff)
@@ -17,7 +17,7 @@ const uint8Max = uint32(0xffff)
 
 func init() {
 	intDigits = make([]int8, 256)
-	for i := 0; i < len(floatDigits); i++ {
+	for i := 0; i < len(intDigits); i++ {
 		intDigits[i] = invalidCharForNumber
 	}
 	for i := int8('0'); i <= int8('9'); i++ {
@@ -37,15 +37,15 @@ func (iter *Iterator) ReadInt8() (ret int8) {
 	c := iter.nextToken()
 	if c == '-' {
 		val := iter.readUint32(iter.readByte())
-		if val > int8Max + 1 {
-			iter.reportError("ReadInt8", "overflow: " + strconv.FormatInt(int64(val), 10))
+		if val > int8Max+1 {
+			iter.reportError("ReadInt8", "overflow: "+strconv.FormatInt(int64(val), 10))
 			return
 		}
 		return -int8(val)
 	} else {
 		val := iter.readUint32(c)
 		if val > int8Max {
-			iter.reportError("ReadInt8", "overflow: " + strconv.FormatInt(int64(val), 10))
+			iter.reportError("ReadInt8", "overflow: "+strconv.FormatInt(int64(val), 10))
 			return
 		}
 		return int8(val)
@@ -55,7 +55,7 @@ func (iter *Iterator) ReadInt8() (ret int8) {
 func (iter *Iterator) ReadUint8() (ret uint8) {
 	val := iter.readUint32(iter.nextToken())
 	if val > uint8Max {
-		iter.reportError("ReadUint8", "overflow: " + strconv.FormatInt(int64(val), 10))
+		iter.reportError("ReadUint8", "overflow: "+strconv.FormatInt(int64(val), 10))
 		return
 	}
 	return uint8(val)
@@ -65,15 +65,15 @@ func (iter *Iterator) ReadInt16() (ret int16) {
 	c := iter.nextToken()
 	if c == '-' {
 		val := iter.readUint32(iter.readByte())
-		if val > int16Max + 1 {
-			iter.reportError("ReadInt16", "overflow: " + strconv.FormatInt(int64(val), 10))
+		if val > int16Max+1 {
+			iter.reportError("ReadInt16", "overflow: "+strconv.FormatInt(int64(val), 10))
 			return
 		}
 		return -int16(val)
 	} else {
 		val := iter.readUint32(c)
 		if val > int16Max {
-			iter.reportError("ReadInt16", "overflow: " + strconv.FormatInt(int64(val), 10))
+			iter.reportError("ReadInt16", "overflow: "+strconv.FormatInt(int64(val), 10))
 			return
 		}
 		return int16(val)
@@ -83,7 +83,7 @@ func (iter *Iterator) ReadInt16() (ret int16) {
 func (iter *Iterator) ReadUint16() (ret uint16) {
 	val := iter.readUint32(iter.nextToken())
 	if val > uint16Max {
-		iter.reportError("ReadUint16", "overflow: " + strconv.FormatInt(int64(val), 10))
+		iter.reportError("ReadUint16", "overflow: "+strconv.FormatInt(int64(val), 10))
 		return
 	}
 	return uint16(val)
@@ -93,15 +93,15 @@ func (iter *Iterator) ReadInt32() (ret int32) {
 	c := iter.nextToken()
 	if c == '-' {
 		val := iter.readUint32(iter.readByte())
-		if val > int32Max + 1 {
-			iter.reportError("ReadInt32", "overflow: " + strconv.FormatInt(int64(val), 10))
+		if val > int32Max+1 {
+			iter.reportError("ReadInt32", "overflow: "+strconv.FormatInt(int64(val), 10))
 			return
 		}
 		return -int32(val)
 	} else {
 		val := iter.readUint32(c)
 		if val > int32Max {
-			iter.reportError("ReadInt32", "overflow: " + strconv.FormatInt(int64(val), 10))
+			iter.reportError("ReadInt32", "overflow: "+strconv.FormatInt(int64(val), 10))
 			return
 		}
 		return int32(val)
@@ -118,11 +118,11 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		return 0 // single zero
 	}
 	if ind == invalidCharForNumber {
-		iter.reportError("readUint32", "unexpected character: " + string([]byte{byte(ind)}))
+		iter.reportError("readUint32", "unexpected character: "+string([]byte{byte(ind)}))
 		return
 	}
 	value := uint32(ind)
-	if iter.tail - iter.head > 10 {
+	if iter.tail-iter.head > 10 {
 		i := iter.head
 		ind2 := intDigits[iter.buf[i]]
 		if ind2 == invalidCharForNumber {
@@ -133,7 +133,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		ind3 := intDigits[iter.buf[i]]
 		if ind3 == invalidCharForNumber {
 			iter.head = i
-			return value * 10 + uint32(ind2)
+			return value*10 + uint32(ind2)
 		}
 		//iter.head = i + 1
 		//value = value * 100 + uint32(ind2) * 10 + uint32(ind3)
@@ -141,35 +141,35 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		ind4 := intDigits[iter.buf[i]]
 		if ind4 == invalidCharForNumber {
 			iter.head = i
-			return value * 100 + uint32(ind2) * 10 + uint32(ind3)
+			return value*100 + uint32(ind2)*10 + uint32(ind3)
 		}
 		i++
 		ind5 := intDigits[iter.buf[i]]
 		if ind5 == invalidCharForNumber {
 			iter.head = i
-			return value * 1000 + uint32(ind2) * 100 + uint32(ind3) * 10 + uint32(ind4)
+			return value*1000 + uint32(ind2)*100 + uint32(ind3)*10 + uint32(ind4)
 		}
 		i++
 		ind6 := intDigits[iter.buf[i]]
 		if ind6 == invalidCharForNumber {
 			iter.head = i
-			return value * 10000 + uint32(ind2) * 1000 + uint32(ind3) * 100 + uint32(ind4) * 10 + uint32(ind5)
+			return value*10000 + uint32(ind2)*1000 + uint32(ind3)*100 + uint32(ind4)*10 + uint32(ind5)
 		}
 		i++
 		ind7 := intDigits[iter.buf[i]]
 		if ind7 == invalidCharForNumber {
 			iter.head = i
-			return value * 100000 + uint32(ind2) * 10000 + uint32(ind3) * 1000 + uint32(ind4) * 100 + uint32(ind5) * 10 + uint32(ind6)
+			return value*100000 + uint32(ind2)*10000 + uint32(ind3)*1000 + uint32(ind4)*100 + uint32(ind5)*10 + uint32(ind6)
 		}
 		i++
 		ind8 := intDigits[iter.buf[i]]
 		if ind8 == invalidCharForNumber {
 			iter.head = i
-			return value * 1000000 + uint32(ind2) * 100000 + uint32(ind3) * 10000 + uint32(ind4) * 1000 + uint32(ind5) * 100 + uint32(ind6) * 10 + uint32(ind7)
+			return value*1000000 + uint32(ind2)*100000 + uint32(ind3)*10000 + uint32(ind4)*1000 + uint32(ind5)*100 + uint32(ind6)*10 + uint32(ind7)
 		}
 		i++
 		ind9 := intDigits[iter.buf[i]]
-		value = value * 10000000 + uint32(ind2) * 1000000 + uint32(ind3) * 100000 + uint32(ind4) * 10000 + uint32(ind5) * 1000 + uint32(ind6) * 100 + uint32(ind7) * 10 + uint32(ind8)
+		value = value*10000000 + uint32(ind2)*1000000 + uint32(ind3)*100000 + uint32(ind4)*10000 + uint32(ind5)*1000 + uint32(ind6)*100 + uint32(ind7)*10 + uint32(ind8)
 		iter.head = i
 		if ind9 == invalidCharForNumber {
 			return value
@@ -194,7 +194,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 			}
 			value = (value << 3) + (value << 1) + uint32(ind)
 		}
-		if (!iter.loadMore()) {
+		if !iter.loadMore() {
 			return value
 		}
 	}
@@ -204,15 +204,15 @@ func (iter *Iterator) ReadInt64() (ret int64) {
 	c := iter.nextToken()
 	if c == '-' {
 		val := iter.readUint64(iter.readByte())
-		if val > int64Max + 1 {
-			iter.reportError("ReadInt64", "overflow: " + strconv.FormatUint(uint64(val), 10))
+		if val > int64Max+1 {
+			iter.reportError("ReadInt64", "overflow: "+strconv.FormatUint(uint64(val), 10))
 			return
 		}
 		return -int64(val)
 	} else {
 		val := iter.readUint64(c)
 		if val > int64Max {
-			iter.reportError("ReadInt64", "overflow: " + strconv.FormatUint(uint64(val), 10))
+			iter.reportError("ReadInt64", "overflow: "+strconv.FormatUint(uint64(val), 10))
 			return
 		}
 		return int64(val)
@@ -229,7 +229,7 @@ func (iter *Iterator) readUint64(c byte) (ret uint64) {
 		return 0 // single zero
 	}
 	if ind == invalidCharForNumber {
-		iter.reportError("readUint64", "unexpected character: " + string([]byte{byte(ind)}))
+		iter.reportError("readUint64", "unexpected character: "+string([]byte{byte(ind)}))
 		return
 	}
 	value := uint64(ind)
@@ -252,7 +252,7 @@ func (iter *Iterator) readUint64(c byte) (ret uint64) {
 			}
 			value = (value << 3) + (value << 1) + uint64(ind)
 		}
-		if (!iter.loadMore()) {
+		if !iter.loadMore() {
 			return value
 		}
 	}

feature_iter_object.go

@@ -1,5 +1,10 @@
 package jsoniter
 
+import (
+	"fmt"
+	"unicode"
+)
+
 func (iter *Iterator) ReadObject() (ret string) {
 	c := iter.nextToken()
 	switch c {
@@ -22,7 +27,7 @@ func (iter *Iterator) ReadObject() (ret string) {
 	case '}':
 		return "" // end of object
 	default:
-		iter.reportError("ReadObject", `expect { or , or } or n`)
+		iter.reportError("ReadObject", fmt.Sprintf(`expect { or , or } or n, but found %s`, string([]byte{c})))
 		return
 	}
 }
@@ -35,11 +40,14 @@ func (iter *Iterator) readFieldHash() int32 {
 			for i := iter.head; i < iter.tail; i++ {
 				// require ascii string and no escape
 				b := iter.buf[i]
+				if 'A' <= b && b <= 'Z' {
+					b += 'a' - 'A'
+				}
 				if b == '"' {
-					iter.head = i+1
+					iter.head = i + 1
 					c = iter.nextToken()
 					if c != ':' {
-						iter.reportError("readFieldHash", `expect :, but found ` + string([]byte{c}))
+						iter.reportError("readFieldHash", `expect :, but found `+string([]byte{c}))
 					}
 					return int32(hash)
 				}
@@ -52,14 +60,14 @@ func (iter *Iterator) readFieldHash() int32 {
 			}
 		}
 	}
-	iter.reportError("readFieldHash", `expect ", but found ` + string([]byte{c}))
+	iter.reportError("readFieldHash", `expect ", but found `+string([]byte{c}))
 	return 0
 }
 
 func calcHash(str string) int32 {
 	hash := int64(0x811c9dc5)
 	for _, b := range str {
-		hash ^= int64(b)
+		hash ^= int64(unicode.ToLower(b))
 		hash *= 0x1000193
 	}
 	return int32(hash)
@@ -76,7 +84,7 @@ func (iter *Iterator) ReadObjectCB(callback func(*Iterator, string) bool) bool {
 				return false
 			}
 			for iter.nextToken() == ',' {
-				field := string(iter.readObjectFieldAsBytes())
+				field = string(iter.readObjectFieldAsBytes())
 				if !callback(iter, field) {
 					return false
 				}
@@ -97,6 +105,46 @@ func (iter *Iterator) ReadObjectCB(callback func(*Iterator, string) bool) bool {
 	return false
 }
 
+func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
+	c := iter.nextToken()
+	if c == '{' {
+		c = iter.nextToken()
+		if c == '"' {
+			iter.unreadByte()
+			field := iter.ReadString()
+			if iter.nextToken() != ':' {
+				iter.reportError("ReadMapCB", "expect : after object field")
+				return false
+			}
+			if !callback(iter, field) {
+				return false
+			}
+			for iter.nextToken() == ',' {
+				field = iter.ReadString()
+				if iter.nextToken() != ':' {
+					iter.reportError("ReadMapCB", "expect : after object field")
+					return false
+				}
+				if !callback(iter, field) {
+					return false
+				}
+			}
+			return true
+		}
+		if c == '}' {
+			return true
+		}
+		iter.reportError("ReadMapCB", `expect " after }`)
+		return false
+	}
+	if c == 'n' {
+		iter.skipFixedBytes(3)
+		return true // null
+	}
+	iter.reportError("ReadMapCB", `expect { or n`)
+	return false
+}
+
 func (iter *Iterator) readObjectStart() bool {
 	c := iter.nextToken()
 	if c == '{' {
@@ -106,8 +154,11 @@ func (iter *Iterator) readObjectStart() bool {
 		}
 		iter.unreadByte()
 		return true
+	} else if c == 'n' {
+		iter.skipFixedBytes(3)
+		return false
 	}
-	iter.reportError("readObjectStart", "expect { ")
+	iter.reportError("readObjectStart", "expect { or n")
 	return false
 }
 

feature_iter_skip.go

@@ -29,6 +29,15 @@ func (iter *Iterator) ReadBool() (ret bool) {
 	return
 }
 
+func (iter *Iterator) SkipAndReturnBytes() []byte {
+	if iter.reader != nil {
+		panic("reader input does not support this api")
+	}
+	before := iter.head
+	iter.Skip()
+	after := iter.head
+	return iter.buf[before:after]
+}
 
 // Skip skips a json object and positions to relatively the next json object
 func (iter *Iterator) Skip() {
@@ -193,15 +202,15 @@ func (iter *Iterator) skipUntilBreak() {
 }
 
 func (iter *Iterator) skipFixedBytes(n int) {
-	iter.head += n;
-	if (iter.head >= iter.tail) {
-		more := iter.head - iter.tail;
+	iter.head += n
+	if iter.head >= iter.tail {
+		more := iter.head - iter.tail
 		if !iter.loadMore() {
 			if more > 0 {
-				iter.reportError("skipFixedBytes", "unexpected end");
+				iter.reportError("skipFixedBytes", "unexpected end")
 			}
 			return
 		}
-		iter.head += more;
+		iter.head += more
 	}
-}
+}

feature_iter_string.go

@@ -2,64 +2,42 @@ package jsoniter
 
 import (
 	"unicode/utf16"
-	"unsafe"
 )
 
-// TODO: avoid append
 func (iter *Iterator) ReadString() (ret string) {
 	c := iter.nextToken()
 	if c == '"' {
-		copied := make([]byte, 32)
-		j := 0
-		fast_loop:
-		for {
-			i := iter.head
-			for ; i < iter.tail && j < len(copied); i++ {
-				c := iter.buf[i]
-				if c == '"' {
-					iter.head = i + 1
-					copied = copied[:j]
-					return *(*string)(unsafe.Pointer(&copied))
-				} else if c == '\\' {
-					iter.head = i
-					break fast_loop
-				}
-				copied[j] = c
-				j++
-			}
-			if i == iter.tail {
-				if iter.loadMore() {
-					i = iter.head
-					continue
-				} else {
-					iter.reportError("ReadString", "incomplete string")
-					return
-				}
-			}
-			iter.head = i
-			if j == len(copied) {
-				newBuf := make([]byte, len(copied) * 2)
-				copy(newBuf, copied)
-				copied = newBuf
+		for i := iter.head; i < iter.tail; i++ {
+			c := iter.buf[i]
+			if c == '"' {
+				ret = string(iter.buf[iter.head:i])
+				iter.head = i + 1
+				return ret
+			} else if c == '\\' {
+				break
 			}
 		}
-		return iter.readStringSlowPath(copied[:j])
+		return iter.readStringSlowPath()
+	} else if c == 'n' {
+		iter.skipFixedBytes(3)
+		return ""
 	}
 	iter.reportError("ReadString", `expects " or n`)
 	return
 }
 
-func (iter *Iterator) readStringSlowPath(str []byte) (ret string) {
+func (iter *Iterator) readStringSlowPath() (ret string) {
+	var str []byte
 	var c byte
 	for iter.Error == nil {
 		c = iter.readByte()
 		if c == '"' {
-			return *(*string)(unsafe.Pointer(&str))
+			return string(str)
 		}
 		if c == '\\' {
 			c = iter.readByte()
 			switch c {
-			case 'u':
+			case 'u', 'U':
 				r := iter.readU4()
 				if utf16.IsSurrogate(r) {
 					c = iter.readByte()
@@ -75,7 +53,7 @@ func (iter *Iterator) readStringSlowPath(str []byte) (ret string) {
 					if iter.Error != nil {
 						return
 					}
-					if c != 'u' {
+					if c != 'u' && c != 'U' {
 						iter.reportError("ReadString",
 							`expects \u after utf16 surrogate, but \u not found`)
 						return
@@ -114,6 +92,7 @@ func (iter *Iterator) readStringSlowPath(str []byte) (ret string) {
 			str = append(str, c)
 		}
 	}
+	iter.reportError("ReadString", "unexpected end of input")
 	return
 }
 
@@ -125,13 +104,13 @@ func (iter *Iterator) ReadStringAsSlice() (ret []byte) {
 			// for: field name, base64, number
 			if iter.buf[i] == '"' {
 				// fast path: reuse the underlying buffer
-				ret = iter.buf[iter.head : i]
+				ret = iter.buf[iter.head:i]
 				iter.head = i + 1
 				return ret
 			}
 		}
 		readLen := iter.tail - iter.head
-		copied := make([]byte, readLen, readLen * 2)
+		copied := make([]byte, readLen, readLen*2)
 		copy(copied, iter.buf[iter.head:iter.tail])
 		iter.head = iter.tail
 		for iter.Error == nil {
@@ -154,9 +133,11 @@ func (iter *Iterator) readU4() (ret rune) {
 			return
 		}
 		if c >= '0' && c <= '9' {
-			ret = ret * 16 + rune(c - '0')
+			ret = ret*16 + rune(c-'0')
 		} else if c >= 'a' && c <= 'f' {
-			ret = ret * 16 + rune(c - 'a' + 10)
+			ret = ret*16 + rune(c-'a'+10)
+		} else if c >= 'A' && c <= 'F' {
+			ret = ret*16 + rune(c-'A'+10)
 		} else {
 			iter.reportError("readU4", "expects 0~9 or a~f")
 			return
@@ -178,14 +159,14 @@ const (
 	mask3 = 0x0F // 0000 1111
 	mask4 = 0x07 // 0000 0111
 
-	rune1Max = 1 << 7 - 1
-	rune2Max = 1 << 11 - 1
-	rune3Max = 1 << 16 - 1
+	rune1Max = 1<<7 - 1
+	rune2Max = 1<<11 - 1
+	rune3Max = 1<<16 - 1
 
 	surrogateMin = 0xD800
 	surrogateMax = 0xDFFF
 
-	maxRune = '\U0010FFFF' // Maximum valid Unicode code point.
+	maxRune   = '\U0010FFFF' // Maximum valid Unicode code point.
 	runeError = '\uFFFD'     // the "error" Rune or "Unicode replacement character"
 )
 
@@ -196,22 +177,22 @@ func appendRune(p []byte, r rune) []byte {
 		p = append(p, byte(r))
 		return p
 	case i <= rune2Max:
-		p = append(p, t2 | byte(r >> 6))
-		p = append(p, tx | byte(r) & maskx)
+		p = append(p, t2|byte(r>>6))
+		p = append(p, tx|byte(r)&maskx)
 		return p
 	case i > maxRune, surrogateMin <= i && i <= surrogateMax:
 		r = runeError
 		fallthrough
 	case i <= rune3Max:
-		p = append(p, t3 | byte(r >> 12))
-		p = append(p, tx | byte(r >> 6) & maskx)
-		p = append(p, tx | byte(r) & maskx)
+		p = append(p, t3|byte(r>>12))
+		p = append(p, tx|byte(r>>6)&maskx)
+		p = append(p, tx|byte(r)&maskx)
 		return p
 	default:
-		p = append(p, t4 | byte(r >> 18))
-		p = append(p, tx | byte(r >> 12) & maskx)
-		p = append(p, tx | byte(r >> 6) & maskx)
-		p = append(p, tx | byte(r) & maskx)
+		p = append(p, t4|byte(r>>18))
+		p = append(p, tx|byte(r>>12)&maskx)
+		p = append(p, tx|byte(r>>6)&maskx)
+		p = append(p, tx|byte(r)&maskx)
 		return p
 	}
-}
+}

feature_reflect.go

@@ -1,33 +1,42 @@
 package jsoniter
 
 import (
+	"encoding"
+	"encoding/json"
 	"fmt"
 	"reflect"
-	"sync/atomic"
 	"unsafe"
-	"errors"
 )
 
-/*
-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
-*/
-
+// Decoder is an internal type registered to cache as needed.
+// Don't confuse jsoniter.Decoder 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 Decoder interface {
 	decode(ptr unsafe.Pointer, iter *Iterator)
 }
 
+// Encoder is an internal type registered to cache as needed.
+// Don't confuse jsoniter.Encoder with json.Encoder.
+// For json.Encoder's adapter, refer to jsoniter.AdapterEncoder(todo godoc link).
 type Encoder interface {
+	isEmpty(ptr unsafe.Pointer) bool
 	encode(ptr unsafe.Pointer, stream *Stream)
 	encodeInterface(val interface{}, stream *Stream)
 }
 
-func WriteToStream(val interface{}, stream *Stream, encoder Encoder) {
+func writeToStream(val interface{}, stream *Stream, encoder Encoder) {
 	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 {
@@ -37,7 +46,7 @@ func WriteToStream(val interface{}, stream *Stream, encoder Encoder) {
 
 type DecoderFunc func(ptr unsafe.Pointer, iter *Iterator)
 type EncoderFunc func(ptr unsafe.Pointer, stream *Stream)
-type ExtensionFunc func(typ reflect.Type, field *reflect.StructField) ([]string, DecoderFunc)
+type ExtensionFunc func(typ reflect.Type, field *reflect.StructField) ([]string, EncoderFunc, DecoderFunc)
 
 type funcDecoder struct {
 	fun DecoderFunc
@@ -56,18 +65,24 @@ func (encoder *funcEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *funcEncoder) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
 }
 
-var DECODERS unsafe.Pointer
-var ENCODERS unsafe.Pointer
+func (encoder *funcEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	return false
+}
 
 var typeDecoders map[string]Decoder
 var fieldDecoders map[string]Decoder
 var typeEncoders map[string]Encoder
 var fieldEncoders map[string]Encoder
 var extensions []ExtensionFunc
+var jsonNumberType reflect.Type
+var jsonRawMessageType reflect.Type
 var anyType reflect.Type
+var marshalerType reflect.Type
+var unmarshalerType reflect.Type
+var textUnmarshalerType reflect.Type
 
 func init() {
 	typeDecoders = map[string]Decoder{}
@@ -75,49 +90,12 @@ func init() {
 	typeEncoders = map[string]Encoder{}
 	fieldEncoders = map[string]Encoder{}
 	extensions = []ExtensionFunc{}
-	atomic.StorePointer(&DECODERS, unsafe.Pointer(&map[string]Decoder{}))
-	atomic.StorePointer(&ENCODERS, unsafe.Pointer(&map[string]Encoder{}))
+	jsonNumberType = reflect.TypeOf((*json.Number)(nil)).Elem()
+	jsonRawMessageType = reflect.TypeOf((*json.RawMessage)(nil)).Elem()
 	anyType = reflect.TypeOf((*Any)(nil)).Elem()
-}
-
-func addDecoderToCache(cacheKey reflect.Type, decoder Decoder) {
-	done := false
-	for !done {
-		ptr := atomic.LoadPointer(&DECODERS)
-		cache := *(*map[reflect.Type]Decoder)(ptr)
-		copied := map[reflect.Type]Decoder{}
-		for k, v := range cache {
-			copied[k] = v
-		}
-		copied[cacheKey] = decoder
-		done = atomic.CompareAndSwapPointer(&DECODERS, ptr, unsafe.Pointer(&copied))
-	}
-}
-
-func addEncoderToCache(cacheKey reflect.Type, encoder Encoder) {
-	done := false
-	for !done {
-		ptr := atomic.LoadPointer(&ENCODERS)
-		cache := *(*map[reflect.Type]Encoder)(ptr)
-		copied := map[reflect.Type]Encoder{}
-		for k, v := range cache {
-			copied[k] = v
-		}
-		copied[cacheKey] = encoder
-		done = atomic.CompareAndSwapPointer(&ENCODERS, ptr, unsafe.Pointer(&copied))
-	}
-}
-
-func getDecoderFromCache(cacheKey reflect.Type) Decoder {
-	ptr := atomic.LoadPointer(&DECODERS)
-	cache := *(*map[reflect.Type]Decoder)(ptr)
-	return cache[cacheKey]
-}
-
-func getEncoderFromCache(cacheKey reflect.Type) Encoder {
-	ptr := atomic.LoadPointer(&ENCODERS)
-	cache := *(*map[reflect.Type]Encoder)(ptr)
-	return cache[cacheKey]
+	marshalerType = reflect.TypeOf((*json.Marshaler)(nil)).Elem()
+	unmarshalerType = reflect.TypeOf((*json.Unmarshaler)(nil)).Elem()
+	textUnmarshalerType = reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem()
 }
 
 // RegisterTypeDecoder can register a type for json object
@@ -143,12 +121,6 @@ func RegisterExtension(extension ExtensionFunc) {
 	extensions = append(extensions, extension)
 }
 
-// CleanDecoders cleans decoders registered
-func CleanDecoders() {
-	typeDecoders = map[string]Decoder{}
-	fieldDecoders = map[string]Decoder{}
-}
-
 type optionalDecoder struct {
 	valueType    reflect.Type
 	valueDecoder Decoder
@@ -171,7 +143,6 @@ func (decoder *optionalDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
 }
 
 type optionalEncoder struct {
-	valueType    reflect.Type
 	valueEncoder Encoder
 }
 
@@ -184,92 +155,58 @@ func (encoder *optionalEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *optionalEncoder) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
 }
 
-type mapDecoder struct {
-	mapType      reflect.Type
-	elemType     reflect.Type
-	elemDecoder  Decoder
-	mapInterface emptyInterface
-}
-
-func (decoder *mapDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	// dark magic to cast unsafe.Pointer back to interface{} using reflect.Type
-	mapInterface := decoder.mapInterface
-	mapInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
-	realVal := reflect.ValueOf(*realInterface).Elem()
-
-	for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
-		elem := reflect.New(decoder.elemType)
-		decoder.elemDecoder.decode(unsafe.Pointer(elem.Pointer()), iter)
-		// to put into map, we have to use reflection
-		realVal.SetMapIndex(reflect.ValueOf(string([]byte(field))), elem.Elem())
+func (encoder *optionalEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	if *((*unsafe.Pointer)(ptr)) == nil {
+		return true
+	} else {
+		return encoder.valueEncoder.isEmpty(*((*unsafe.Pointer)(ptr)))
 	}
 }
 
-type mapEncoder struct {
-	mapType      reflect.Type
-	elemType     reflect.Type
-	elemEncoder  Encoder
-	mapInterface emptyInterface
+type placeholderEncoder struct {
+	valueEncoder Encoder
 }
 
-func (encoder *mapEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
-	mapInterface := encoder.mapInterface
-	mapInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
-	realVal := reflect.ValueOf(*realInterface)
-
-	stream.WriteObjectStart()
-	for i, key := range realVal.MapKeys() {
-		if i != 0 {
-			stream.WriteMore()
-		}
-		stream.WriteObjectField(key.String())
-		val := realVal.MapIndex(key).Interface()
-		encoder.elemEncoder.encodeInterface(val, stream)
-	}
-	stream.WriteObjectEnd()
+func (encoder *placeholderEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	encoder.valueEncoder.encode(ptr, stream)
 }
 
-func (encoder *mapEncoder) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+func (encoder *placeholderEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
 }
 
-type mapInterfaceEncoder struct {
-	mapType      reflect.Type
-	elemType     reflect.Type
-	elemEncoder  Encoder
-	mapInterface emptyInterface
+func (encoder *placeholderEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	return encoder.valueEncoder.isEmpty(ptr)
 }
 
-func (encoder *mapInterfaceEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
-	mapInterface := encoder.mapInterface
-	mapInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
-	realVal := reflect.ValueOf(*realInterface)
-
-	stream.WriteObjectStart()
-	for i, key := range realVal.MapKeys() {
-		if i != 0 {
-			stream.WriteMore()
-		}
-		stream.WriteObjectField(key.String())
-		val := realVal.MapIndex(key).Interface()
-		encoder.elemEncoder.encode(unsafe.Pointer(&val), stream)
-	}
-	stream.WriteObjectEnd()
+type placeholderDecoder struct {
+	valueDecoder Decoder
 }
 
-func (encoder *mapInterfaceEncoder) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+func (decoder *placeholderDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
+	decoder.valueDecoder.decode(ptr, iter)
 }
 
 // emptyInterface is the header for an interface{} value.
 type emptyInterface struct {
-	typ  *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
 }
 
@@ -277,21 +214,20 @@ type emptyInterface struct {
 func (iter *Iterator) ReadVal(obj interface{}) {
 	typ := reflect.TypeOf(obj)
 	cacheKey := typ.Elem()
-	cachedDecoder := getDecoderFromCache(cacheKey)
+	cachedDecoder := iter.cfg.getDecoderFromCache(cacheKey)
 	if cachedDecoder == nil {
-		decoder, err := decoderOfType(cacheKey)
+		decoder, err := decoderOfType(iter.cfg, cacheKey)
 		if err != nil {
 			iter.Error = err
 			return
 		}
 		cachedDecoder = decoder
-		addDecoderToCache(cacheKey, decoder)
+		iter.cfg.addDecoderToCache(cacheKey, decoder)
 	}
 	e := (*emptyInterface)(unsafe.Pointer(&obj))
 	cachedDecoder.decode(e.word, iter)
 }
 
-
 func (stream *Stream) WriteVal(val interface{}) {
 	if nil == val {
 		stream.WriteNil()
@@ -299,15 +235,15 @@ func (stream *Stream) WriteVal(val interface{}) {
 	}
 	typ := reflect.TypeOf(val)
 	cacheKey := typ
-	cachedEncoder := getEncoderFromCache(cacheKey)
+	cachedEncoder := stream.cfg.getEncoderFromCache(cacheKey)
 	if cachedEncoder == nil {
-		encoder, err := encoderOfType(cacheKey)
+		encoder, err := encoderOfType(stream.cfg, cacheKey)
 		if err != nil {
 			stream.Error = err
 			return
 		}
 		cachedEncoder = encoder
-		addEncoderToCache(cacheKey, encoder)
+		stream.cfg.addEncoderToCache(cacheKey, encoder)
 	}
 	cachedEncoder.encodeInterface(val, stream)
 }
@@ -328,12 +264,48 @@ func (p prefix) addToEncoder(encoder Encoder, err error) (Encoder, error) {
 	return encoder, err
 }
 
-func decoderOfType(typ reflect.Type) (Decoder, error) {
+func decoderOfType(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
 	typeName := typ.String()
 	typeDecoder := typeDecoders[typeName]
 	if typeDecoder != nil {
 		return typeDecoder, nil
 	}
+	if typ.Kind() == reflect.Ptr {
+		typeDecoder := typeDecoders[typ.Elem().String()]
+		if typeDecoder != nil {
+			return &optionalDecoder{typ.Elem(), typeDecoder}, nil
+		}
+	}
+	cacheKey := typ
+	cachedDecoder := cfg.getDecoderFromCache(cacheKey)
+	if cachedDecoder != nil {
+		return cachedDecoder, nil
+	}
+	placeholder := &placeholderDecoder{}
+	cfg.addDecoderToCache(cacheKey, placeholder)
+	newDecoder, err := createDecoderOfType(cfg, typ)
+	placeholder.valueDecoder = newDecoder
+	cfg.addDecoderToCache(cacheKey, newDecoder)
+	return newDecoder, err
+}
+
+func createDecoderOfType(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
+	if typ.String() == "[]uint8" {
+		return &base64Codec{}, nil
+	}
+	if typ.AssignableTo(jsonRawMessageType) {
+		return &jsonRawMessageCodec{}, nil
+	}
+	if typ.AssignableTo(jsonNumberType) {
+		return &jsonNumberCodec{}, nil
+	}
+	if typ.ConvertibleTo(unmarshalerType) {
+		templateInterface := reflect.New(typ).Elem().Interface()
+		return &optionalDecoder{typ, &unmarshalerDecoder{extractInterface(templateInterface)}}, nil
+	}
+	if typ.ConvertibleTo(anyType) {
+		return &anyCodec{}, nil
+	}
 	switch typ.Kind() {
 	case reflect.String:
 		return &stringCodec{}, nil
@@ -365,33 +337,67 @@ func decoderOfType(typ reflect.Type) (Decoder, error) {
 		return &boolCodec{}, nil
 	case reflect.Interface:
 		if typ.NumMethod() == 0 {
-			return &interfaceCodec{}, nil
+			return &emptyInterfaceCodec{}, nil
 		} else {
-			return nil, errors.New("unsupportd type: " + typ.String())
+			return &nonEmptyInterfaceCodec{}, nil
 		}
 	case reflect.Struct:
-		return prefix(fmt.Sprintf("[%s]", typeName)).addToDecoder(decoderOfStruct(typ))
+		return prefix(fmt.Sprintf("[%s]", typ.String())).addToDecoder(decoderOfStruct(cfg, typ))
 	case reflect.Slice:
-		return prefix("[slice]").addToDecoder(decoderOfSlice(typ))
+		return prefix("[slice]").addToDecoder(decoderOfSlice(cfg, typ))
 	case reflect.Map:
-		return prefix("[map]").addToDecoder(decoderOfMap(typ))
+		return prefix("[map]").addToDecoder(decoderOfMap(cfg, typ))
 	case reflect.Ptr:
-		return prefix("[optional]").addToDecoder(decoderOfOptional(typ))
+		return prefix("[optional]").addToDecoder(decoderOfOptional(cfg, typ))
 	default:
 		return nil, fmt.Errorf("unsupported type: %v", typ)
 	}
 }
 
-func encoderOfType(typ reflect.Type) (Encoder, error) {
-	if typ.ConvertibleTo(anyType) {
-		return &anyCodec{}, nil
-	}
+func encoderOfType(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
 	typeName := typ.String()
 	typeEncoder := typeEncoders[typeName]
 	if typeEncoder != nil {
 		return typeEncoder, nil
 	}
-	switch typ.Kind() {
+	if typ.Kind() == reflect.Ptr {
+		typeEncoder := typeEncoders[typ.Elem().String()]
+		if typeEncoder != nil {
+			return &optionalEncoder{typeEncoder}, nil
+		}
+	}
+	cacheKey := typ
+	cachedEncoder := cfg.getEncoderFromCache(cacheKey)
+	if cachedEncoder != nil {
+		return cachedEncoder, nil
+	}
+	placeholder := &placeholderEncoder{}
+	cfg.addEncoderToCache(cacheKey, placeholder)
+	newEncoder, err := createEncoderOfType(cfg, typ)
+	placeholder.valueEncoder = newEncoder
+	cfg.addEncoderToCache(cacheKey, newEncoder)
+	return newEncoder, err
+}
+
+func createEncoderOfType(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
+	if typ.String() == "[]uint8" {
+		return &base64Codec{}, nil
+	}
+	if typ.AssignableTo(jsonRawMessageType) {
+		return &jsonRawMessageCodec{}, nil
+	}
+	if typ.AssignableTo(jsonNumberType) {
+		return &jsonNumberCodec{}, nil
+	}
+	if typ.ConvertibleTo(marshalerType) {
+		templateInterface := reflect.New(typ).Elem().Interface()
+		return &marshalerEncoder{extractInterface(templateInterface)}, nil
+	}
+	if typ.ConvertibleTo(anyType) {
+		return &anyCodec{}, nil
+	}
+	kind := typ.Kind()
+	switch kind {
 	case reflect.String:
 		return &stringCodec{}, nil
 	case reflect.Int:
@@ -421,56 +427,68 @@ func encoderOfType(typ reflect.Type) (Encoder, error) {
 	case reflect.Bool:
 		return &boolCodec{}, nil
 	case reflect.Interface:
-		return &interfaceCodec{}, nil
+		if typ.NumMethod() == 0 {
+			return &emptyInterfaceCodec{}, nil
+		} else {
+			return &nonEmptyInterfaceCodec{}, nil
+		}
 	case reflect.Struct:
-		return prefix(fmt.Sprintf("[%s]", typeName)).addToEncoder(encoderOfStruct(typ))
+		return prefix(fmt.Sprintf("[%s]", typ.String())).addToEncoder(encoderOfStruct(cfg, typ))
 	case reflect.Slice:
-		return prefix("[slice]").addToEncoder(encoderOfSlice(typ))
+		return prefix("[slice]").addToEncoder(encoderOfSlice(cfg, typ))
 	case reflect.Map:
-		return prefix("[map]").addToEncoder(encoderOfMap(typ))
+		return prefix("[map]").addToEncoder(encoderOfMap(cfg, typ))
 	case reflect.Ptr:
-		return prefix("[optional]").addToEncoder(encoderOfOptional(typ))
+		return prefix("[optional]").addToEncoder(encoderOfOptional(cfg, typ))
 	default:
 		return nil, fmt.Errorf("unsupported type: %v", typ)
 	}
 }
 
-func decoderOfOptional(typ reflect.Type) (Decoder, error) {
+func decoderOfOptional(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
 	elemType := typ.Elem()
-	decoder, err := decoderOfType(elemType)
+	decoder, err := decoderOfType(cfg, elemType)
 	if err != nil {
 		return nil, err
 	}
 	return &optionalDecoder{elemType, decoder}, nil
 }
 
-func encoderOfOptional(typ reflect.Type) (Encoder, error) {
+func encoderOfOptional(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
 	elemType := typ.Elem()
-	decoder, err := encoderOfType(elemType)
+	elemEncoder, err := encoderOfType(cfg, elemType)
 	if err != nil {
 		return nil, err
 	}
-	return &optionalEncoder{elemType, decoder}, nil
+	encoder := &optionalEncoder{elemEncoder}
+	if elemType.Kind() == reflect.Map {
+		encoder = &optionalEncoder{encoder}
+	}
+	return encoder, nil
 }
 
-func decoderOfMap(typ reflect.Type) (Decoder, error) {
-	decoder, err := decoderOfType(typ.Elem())
+func decoderOfMap(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
+	decoder, err := decoderOfType(cfg, typ.Elem())
 	if err != nil {
 		return nil, err
 	}
 	mapInterface := reflect.New(typ).Interface()
-	return &mapDecoder{typ, typ.Elem(), decoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
+	return &mapDecoder{typ, typ.Key(), typ.Elem(), decoder, extractInterface(mapInterface)}, nil
 }
 
-func encoderOfMap(typ reflect.Type) (Encoder, error) {
+func extractInterface(val interface{}) emptyInterface {
+	return *((*emptyInterface)(unsafe.Pointer(&val)))
+}
+
+func encoderOfMap(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
 	elemType := typ.Elem()
-	encoder, err := encoderOfType(elemType)
+	encoder, err := encoderOfType(cfg, elemType)
 	if err != nil {
 		return nil, err
 	}
 	mapInterface := reflect.New(typ).Elem().Interface()
-	if elemType.Kind() == reflect.Interface && elemType.NumMethod() == 0 {
-		return &mapInterfaceEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
+	if cfg.sortMapKeys {
+		return &sortKeysMapEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
 	} else {
 		return &mapEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
 	}

feature_reflect_array.go

@@ -1,25 +1,28 @@
 package jsoniter
 
 import (
-	"unsafe"
-	"reflect"
-	"io"
 	"fmt"
+	"io"
+	"reflect"
+	"unsafe"
 )
 
-func decoderOfSlice(typ reflect.Type) (Decoder, error) {
-	decoder, err := decoderOfType(typ.Elem())
+func decoderOfSlice(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
+	decoder, err := decoderOfType(cfg, typ.Elem())
 	if err != nil {
 		return nil, err
 	}
 	return &sliceDecoder{typ, typ.Elem(), decoder}, nil
 }
 
-func encoderOfSlice(typ reflect.Type) (Encoder, error) {
-	encoder, err := encoderOfType(typ.Elem())
+func encoderOfSlice(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
+	encoder, err := encoderOfType(cfg, typ.Elem())
 	if err != nil {
 		return nil, err
 	}
+	if typ.Elem().Kind() == reflect.Map {
+		encoder = &optionalEncoder{encoder}
+	}
 	return &sliceEncoder{typ, typ.Elem(), encoder}, nil
 }
 
@@ -31,6 +34,10 @@ type sliceEncoder struct {
 
 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
@@ -50,7 +57,12 @@ func (encoder *sliceEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *sliceEncoder) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *sliceEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	slice := (*sliceHeader)(ptr)
+	return slice.Len == 0
 }
 
 type sliceDecoder struct {
@@ -80,30 +92,30 @@ func (decoder *sliceDecoder) doDecode(ptr unsafe.Pointer, iter *Iterator) {
 		return
 	}
 	offset := uintptr(0)
-	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data) + offset), iter)
+	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
 	if !iter.ReadArray() {
 		slice.Len = 1
 		return
 	}
 	offset += decoder.elemType.Size()
-	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data) + offset), iter)
+	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
 	if !iter.ReadArray() {
 		slice.Len = 2
 		return
 	}
 	offset += decoder.elemType.Size()
-	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data) + offset), iter)
+	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
 	if !iter.ReadArray() {
 		slice.Len = 3
 		return
 	}
 	offset += decoder.elemType.Size()
-	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data) + offset), iter)
+	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
 	slice.Len = 4
 	for iter.ReadArray() {
 		growOne(slice, decoder.sliceType, decoder.elemType)
 		offset += decoder.elemType.Size()
-		decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data) + offset), iter)
+		decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
 	}
 }
 
@@ -147,4 +159,4 @@ func reuseSlice(slice *sliceHeader, sliceType reflect.Type, expectedCap int) {
 	dst := unsafe.Pointer(reflect.MakeSlice(sliceType, 0, expectedCap).Pointer())
 	slice.Cap = expectedCap
 	slice.Data = dst
-}
+}

feature_reflect_map.go

@@ -0,0 +1,217 @@
+package jsoniter
+
+import (
+	"encoding"
+	"encoding/json"
+	"reflect"
+	"strconv"
+	"unsafe"
+	"sort"
+)
+
+type mapDecoder struct {
+	mapType      reflect.Type
+	keyType      reflect.Type
+	elemType     reflect.Type
+	elemDecoder  Decoder
+	mapInterface emptyInterface
+}
+
+func (decoder *mapDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
+	// dark magic to cast unsafe.Pointer back to interface{} using reflect.Type
+	mapInterface := decoder.mapInterface
+	mapInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
+	realVal := reflect.ValueOf(*realInterface).Elem()
+	if realVal.IsNil() {
+		realVal.Set(reflect.MakeMap(realVal.Type()))
+	}
+	iter.ReadMapCB(func(iter *Iterator, keyStr string) bool {
+		elem := reflect.New(decoder.elemType)
+		decoder.elemDecoder.decode(unsafe.Pointer(elem.Pointer()), iter)
+		// to put into map, we have to use reflection
+		keyType := decoder.keyType
+		switch {
+		case keyType.Kind() == reflect.String:
+			realVal.SetMapIndex(reflect.ValueOf(keyStr), elem.Elem())
+			return true
+		case keyType.Implements(textUnmarshalerType):
+			textUnmarshaler := reflect.New(keyType.Elem()).Interface().(encoding.TextUnmarshaler)
+			err := textUnmarshaler.UnmarshalText([]byte(keyStr))
+			if err != nil {
+				iter.reportError("read map key as TextUnmarshaler", err.Error())
+				return false
+			}
+			realVal.SetMapIndex(reflect.ValueOf(textUnmarshaler), elem.Elem())
+			return true
+		default:
+			switch keyType.Kind() {
+			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+				n, err := strconv.ParseInt(keyStr, 10, 64)
+				if err != nil || reflect.Zero(keyType).OverflowInt(n) {
+					iter.reportError("read map key as int64", "read int64 failed")
+					return false
+				}
+				realVal.SetMapIndex(reflect.ValueOf(n).Convert(keyType), elem.Elem())
+				return true
+			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+				n, err := strconv.ParseUint(keyStr, 10, 64)
+				if err != nil || reflect.Zero(keyType).OverflowUint(n) {
+					iter.reportError("read map key as uint64", "read uint64 failed")
+					return false
+				}
+				realVal.SetMapIndex(reflect.ValueOf(n).Convert(keyType), elem.Elem())
+				return true
+			}
+		}
+		iter.reportError("read map key", "unexpected map key type "+keyType.String())
+		return true
+	})
+}
+
+type mapEncoder struct {
+	mapType      reflect.Type
+	elemType     reflect.Type
+	elemEncoder  Encoder
+	mapInterface emptyInterface
+}
+
+func (encoder *mapEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	mapInterface := encoder.mapInterface
+	mapInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
+	realVal := reflect.ValueOf(*realInterface)
+
+	stream.WriteObjectStart()
+	for i, key := range realVal.MapKeys() {
+		if i != 0 {
+			stream.WriteMore()
+		}
+		encodeMapKey(key, stream)
+		stream.writeByte(':')
+		val := realVal.MapIndex(key).Interface()
+		encoder.elemEncoder.encodeInterface(val, stream)
+	}
+	stream.WriteObjectEnd()
+}
+
+func encodeMapKey(key reflect.Value, stream *Stream) {
+	if key.Kind() == reflect.String {
+		stream.WriteString(key.String())
+		return
+	}
+	if tm, ok := key.Interface().(encoding.TextMarshaler); ok {
+		buf, err := tm.MarshalText()
+		if err != nil {
+			stream.Error = err
+			return
+		}
+		stream.writeByte('"')
+		stream.Write(buf)
+		stream.writeByte('"')
+		return
+	}
+	switch key.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		stream.writeByte('"')
+		stream.WriteInt64(key.Int())
+		stream.writeByte('"')
+		return
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		stream.writeByte('"')
+		stream.WriteUint64(key.Uint())
+		stream.writeByte('"')
+		return
+	}
+	stream.Error = &json.UnsupportedTypeError{key.Type()}
+}
+
+func (encoder *mapEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *mapEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	mapInterface := encoder.mapInterface
+	mapInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
+	realVal := reflect.ValueOf(*realInterface)
+	return realVal.Len() == 0
+}
+
+type sortKeysMapEncoder struct {
+	mapType      reflect.Type
+	elemType     reflect.Type
+	elemEncoder  Encoder
+	mapInterface emptyInterface
+}
+
+func (encoder *sortKeysMapEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	mapInterface := encoder.mapInterface
+	mapInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
+	realVal := reflect.ValueOf(*realInterface)
+
+
+	// Extract and sort the keys.
+	keys := realVal.MapKeys()
+	sv := make([]reflectWithString, len(keys))
+	for i, v := range keys {
+		sv[i].v = v
+		if err := sv[i].resolve(); err != nil {
+			stream.Error = err
+			return
+		}
+	}
+	sort.Slice(sv, func(i, j int) bool { return sv[i].s < sv[j].s })
+
+	stream.WriteObjectStart()
+	for i, key := range sv {
+		if i != 0 {
+			stream.WriteMore()
+		}
+		encodeMapKey(key.v, stream)
+		stream.writeByte(':')
+		val := realVal.MapIndex(key.v).Interface()
+		encoder.elemEncoder.encodeInterface(val, stream)
+	}
+	stream.WriteObjectEnd()
+}
+
+
+type reflectWithString struct {
+	v reflect.Value
+	s string
+}
+
+func (w *reflectWithString) resolve() error {
+	if w.v.Kind() == reflect.String {
+		w.s = w.v.String()
+		return nil
+	}
+	if tm, ok := w.v.Interface().(encoding.TextMarshaler); ok {
+		buf, err := tm.MarshalText()
+		w.s = string(buf)
+		return err
+	}
+	switch w.v.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		w.s = strconv.FormatInt(w.v.Int(), 10)
+		return nil
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		w.s = strconv.FormatUint(w.v.Uint(), 10)
+		return nil
+	}
+	panic("unexpected map key type")
+}
+
+func (encoder *sortKeysMapEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *sortKeysMapEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	mapInterface := encoder.mapInterface
+	mapInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
+	realVal := reflect.ValueOf(*realInterface)
+	return realVal.Len() == 0
+}

feature_reflect_native.go

@@ -1,6 +1,8 @@
 package jsoniter
 
 import (
+	"encoding/base64"
+	"encoding/json"
 	"unsafe"
 )
 
@@ -12,11 +14,16 @@ func (codec *stringCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
 }
 
 func (codec *stringCodec) encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteString(*((*string)(ptr)))
+	str := *((*string)(ptr))
+	stream.WriteString(str)
 }
 
 func (encoder *stringCodec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *stringCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*string)(ptr)) == ""
 }
 
 type intCodec struct {
@@ -31,7 +38,11 @@ func (codec *intCodec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *intCodec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *intCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*int)(ptr)) == 0
 }
 
 type int8Codec struct {
@@ -46,7 +57,11 @@ func (codec *int8Codec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *int8Codec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *int8Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*int8)(ptr)) == 0
 }
 
 type int16Codec struct {
@@ -61,7 +76,11 @@ func (codec *int16Codec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *int16Codec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *int16Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*int16)(ptr)) == 0
 }
 
 type int32Codec struct {
@@ -76,7 +95,11 @@ func (codec *int32Codec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *int32Codec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *int32Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*int32)(ptr)) == 0
 }
 
 type int64Codec struct {
@@ -91,7 +114,11 @@ func (codec *int64Codec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *int64Codec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *int64Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*int64)(ptr)) == 0
 }
 
 type uintCodec struct {
@@ -106,7 +133,11 @@ func (codec *uintCodec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *uintCodec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *uintCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint)(ptr)) == 0
 }
 
 type uint8Codec struct {
@@ -121,7 +152,11 @@ func (codec *uint8Codec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *uint8Codec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *uint8Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint8)(ptr)) == 0
 }
 
 type uint16Codec struct {
@@ -136,7 +171,11 @@ func (codec *uint16Codec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *uint16Codec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *uint16Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint16)(ptr)) == 0
 }
 
 type uint32Codec struct {
@@ -151,7 +190,11 @@ func (codec *uint32Codec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *uint32Codec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *uint32Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint32)(ptr)) == 0
 }
 
 type uint64Codec struct {
@@ -166,7 +209,11 @@ func (codec *uint64Codec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *uint64Codec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *uint64Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint64)(ptr)) == 0
 }
 
 type float32Codec struct {
@@ -181,7 +228,11 @@ func (codec *float32Codec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *float32Codec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *float32Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*float32)(ptr)) == 0
 }
 
 type float64Codec struct {
@@ -196,7 +247,11 @@ func (codec *float64Codec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *float64Codec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *float64Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*float64)(ptr)) == 0
 }
 
 type boolCodec struct {
@@ -211,24 +266,67 @@ func (codec *boolCodec) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *boolCodec) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
 }
 
-type interfaceCodec struct {
+func (codec *boolCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return !(*((*bool)(ptr)))
 }
 
-func (codec *interfaceCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+type emptyInterfaceCodec struct {
+}
+
+func (codec *emptyInterfaceCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
 	*((*interface{})(ptr)) = iter.Read()
 }
 
-func (codec *interfaceCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+func (codec *emptyInterfaceCodec) encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteVal(*((*interface{})(ptr)))
 }
 
-func (encoder *interfaceCodec) encodeInterface(val interface{}, stream *Stream) {
+func (encoder *emptyInterfaceCodec) encodeInterface(val interface{}, stream *Stream) {
 	stream.WriteVal(val)
 }
 
+func (codec *emptyInterfaceCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return ptr == nil
+}
+
+type nonEmptyInterfaceCodec struct {
+}
+
+func (codec *nonEmptyInterfaceCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	nonEmptyInterface := (*nonEmptyInterface)(ptr)
+	if nonEmptyInterface.itab == nil {
+		iter.reportError("read non-empty interface", "do not know which concrete type to decode to")
+		return
+	}
+	var i interface{}
+	e := (*emptyInterface)(unsafe.Pointer(&i))
+	e.typ = nonEmptyInterface.itab.typ
+	e.word = nonEmptyInterface.word
+	iter.ReadVal(&i)
+	nonEmptyInterface.word = e.word
+}
+
+func (codec *nonEmptyInterfaceCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	nonEmptyInterface := (*nonEmptyInterface)(ptr)
+	var i interface{}
+	e := (*emptyInterface)(unsafe.Pointer(&i))
+	e.typ = nonEmptyInterface.itab.typ
+	e.word = nonEmptyInterface.word
+	stream.WriteVal(i)
+}
+
+func (encoder *nonEmptyInterfaceCodec) encodeInterface(val interface{}, stream *Stream) {
+	stream.WriteVal(val)
+}
+
+func (codec *nonEmptyInterfaceCodec) isEmpty(ptr unsafe.Pointer) bool {
+	nonEmptyInterface := (*nonEmptyInterface)(ptr)
+	return nonEmptyInterface.word == nil
+}
+
 type anyCodec struct {
 }
 
@@ -244,6 +342,91 @@ func (encoder *anyCodec) encodeInterface(val interface{}, stream *Stream) {
 	(val.(Any)).WriteTo(stream)
 }
 
+func (encoder *anyCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return (*((*Any)(ptr))).Size() == 0
+}
+
+type jsonNumberCodec struct {
+}
+
+func (codec *jsonNumberCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*json.Number)(ptr)) = json.Number([]byte(iter.readNumberAsString()))
+}
+
+func (codec *jsonNumberCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteRaw(string(*((*json.Number)(ptr))))
+}
+
+func (encoder *jsonNumberCodec) encodeInterface(val interface{}, stream *Stream) {
+	stream.WriteRaw(string(val.(json.Number)))
+}
+
+func (encoder *jsonNumberCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*json.Number)(ptr))) == 0
+}
+
+type jsonRawMessageCodec struct {
+}
+
+func (codec *jsonRawMessageCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*json.RawMessage)(ptr)) = json.RawMessage(iter.SkipAndReturnBytes())
+}
+
+func (codec *jsonRawMessageCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteRaw(string(*((*json.RawMessage)(ptr))))
+}
+
+func (encoder *jsonRawMessageCodec) encodeInterface(val interface{}, stream *Stream) {
+	stream.WriteRaw(string(val.(json.RawMessage)))
+}
+
+func (encoder *jsonRawMessageCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*json.RawMessage)(ptr))) == 0
+}
+
+type base64Codec struct {
+}
+
+func (codec *base64Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	encoding := base64.StdEncoding
+	src := iter.SkipAndReturnBytes()
+	src = src[1 : len(src)-1]
+	decodedLen := encoding.DecodedLen(len(src))
+	dst := make([]byte, decodedLen)
+	_, err := encoding.Decode(dst, src)
+	if err != nil {
+		iter.reportError("decode base64", err.Error())
+	} else {
+		*((*[]byte)(ptr)) = dst
+	}
+}
+
+func (codec *base64Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	encoding := base64.StdEncoding
+	stream.writeByte('"')
+	src := *((*[]byte)(ptr))
+	toGrow := encoding.EncodedLen(len(src))
+	stream.ensure(toGrow)
+	encoding.Encode(stream.buf[stream.n:], src)
+	stream.n += toGrow
+	stream.writeByte('"')
+}
+
+func (encoder *base64Codec) encodeInterface(val interface{}, stream *Stream) {
+	encoding := base64.StdEncoding
+	stream.writeByte('"')
+	src := val.([]byte)
+	toGrow := encoding.EncodedLen(len(src))
+	stream.ensure(toGrow)
+	encoding.Encode(stream.buf[stream.n:], src)
+	stream.n += toGrow
+	stream.writeByte('"')
+}
+
+func (encoder *base64Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*[]byte)(ptr))) == 0
+}
+
 type stringNumberDecoder struct {
 	elemDecoder Decoder
 }
@@ -263,4 +446,53 @@ func (decoder *stringNumberDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
 		iter.reportError("stringNumberDecoder", `expect "`)
 		return
 	}
-}
+}
+
+type marshalerEncoder struct {
+	templateInterface emptyInterface
+}
+
+func (encoder *marshalerEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	templateInterface := encoder.templateInterface
+	templateInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
+	marshaler := (*realInterface).(json.Marshaler)
+	bytes, err := marshaler.MarshalJSON()
+	if err != nil {
+		stream.Error = err
+	} else {
+		stream.Write(bytes)
+	}
+}
+func (encoder *marshalerEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *marshalerEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	templateInterface := encoder.templateInterface
+	templateInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
+	marshaler := (*realInterface).(json.Marshaler)
+	bytes, err := marshaler.MarshalJSON()
+	if err != nil {
+		return true
+	} else {
+		return len(bytes) > 0
+	}
+}
+
+type unmarshalerDecoder struct {
+	templateInterface emptyInterface
+}
+
+func (decoder *unmarshalerDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
+	templateInterface := decoder.templateInterface
+	templateInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
+	unmarshaler := (*realInterface).(json.Unmarshaler)
+	bytes := iter.SkipAndReturnBytes()
+	err := unmarshaler.UnmarshalJSON(bytes)
+	if err != nil {
+		iter.reportError("unmarshaler", err.Error())
+	}
+}

feature_reflect_object.go

@@ -1,71 +1,104 @@
 package jsoniter
 
 import (
-	"io"
 	"fmt"
+	"io"
 	"reflect"
-	"unsafe"
 	"strings"
+	"unicode"
+	"unsafe"
 )
 
-
-func encoderOfStruct(typ reflect.Type) (Encoder, error) {
+func encoderOfStruct(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
 	structEncoder_ := &structEncoder{}
-	for i := 0; i < typ.NumField(); i++ {
-		field := typ.Field(i)
-		var fieldNames []string
+	fields := map[string]*structFieldEncoder{}
+	for _, field := range listStructFields(typ) {
+		fieldEncoderKey := fmt.Sprintf("%s/%s", typ.String(), field.Name)
+		var extensionProvidedFieldNames []string
 		for _, extension := range extensions {
-			alternativeFieldNames, _ := extension(typ, &field)
+			alternativeFieldNames, fun, _ := extension(typ, field)
 			if alternativeFieldNames != nil {
-				fieldNames = alternativeFieldNames
+				extensionProvidedFieldNames = alternativeFieldNames
+			}
+			if fun != nil {
+				fieldEncoders[fieldEncoderKey] = &funcEncoder{fun}
+			}
+		}
+		for _, extension := range cfg.extensions {
+			alternativeFieldNames, fun, _ := extension(typ, field)
+			if alternativeFieldNames != nil {
+				extensionProvidedFieldNames = alternativeFieldNames
+			}
+			if fun != nil {
+				fieldEncoders[fieldEncoderKey] = &funcEncoder{fun}
 			}
 		}
 		tagParts := strings.Split(field.Tag.Get("json"), ",")
 		// if fieldNames set by extension, use theirs, otherwise try tags
-		if fieldNames == nil {
-			/// tagParts[0] always present, even if no tags
-			switch tagParts[0] {
-			case "":
-				fieldNames = []string{field.Name}
-			case "-":
-				fieldNames = []string{}
-			default:
-				fieldNames = []string{tagParts[0]}
+		fieldNames := calcFieldNames(field.Name, tagParts[0], extensionProvidedFieldNames)
+		omitempty := false
+		for _, tagPart := range tagParts {
+			if tagPart == "omitempty" {
+				omitempty = true
 			}
 		}
-		encoder, err := encoderOfType(field.Type)
-		if err != nil {
-			return prefix(fmt.Sprintf("{%s}", field.Name)).addToEncoder(encoder, err)
-		}
-		// map is stored as pointer in the struct
-		// but if struct only has one map, it is inlined
-		if field.Type.Kind() == reflect.Map && typ.NumField() > 1 {
-			encoder = &optionalEncoder{field.Type, encoder}
+		encoder := fieldEncoders[fieldEncoderKey]
+		var err error
+		if encoder == nil && len(fieldNames) > 0 {
+			encoder, err = encoderOfType(cfg, field.Type)
+			if err != nil {
+				return prefix(fmt.Sprintf("{%s}", field.Name)).addToEncoder(encoder, err)
+			}
+			// map is stored as pointer in the struct
+			if field.Type.Kind() == reflect.Map {
+				encoder = &optionalEncoder{encoder}
+			}
 		}
 		for _, fieldName := range fieldNames {
-			if structEncoder_.firstField == nil {
-				structEncoder_.firstField = &structFieldEncoder{&field, fieldName, encoder}
-			} else {
-				structEncoder_.fields = append(structEncoder_.fields, &structFieldEncoder{&field, fieldName, encoder})
-			}
+			fields[fieldName] = &structFieldEncoder{field, fieldName, encoder, omitempty}
 		}
 	}
-	if structEncoder_.firstField == nil {
+	if len(fields) == 0 {
 		return &emptyStructEncoder{}, nil
 	}
+	for _, field := range fields {
+		structEncoder_.fields = append(structEncoder_.fields, field)
+	}
 	return structEncoder_, nil
 }
 
-func decoderOfStruct(typ reflect.Type) (Decoder, error) {
+func listStructFields(typ reflect.Type) []*reflect.StructField {
+	fields := []*reflect.StructField{}
+	for i := 0; i < typ.NumField(); i++ {
+		field := typ.Field(i)
+		if field.Anonymous {
+			fields = append(fields, listStructFields(field.Type)...)
+		} else {
+			fields = append(fields, &field)
+		}
+	}
+	return fields
+}
+
+func decoderOfStruct(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
 	fields := map[string]*structFieldDecoder{}
 	for i := 0; i < typ.NumField(); i++ {
 		field := typ.Field(i)
 		fieldDecoderKey := fmt.Sprintf("%s/%s", typ.String(), field.Name)
-		var fieldNames []string
+		var extensionProviedFieldNames []string
 		for _, extension := range extensions {
-			alternativeFieldNames, fun := extension(typ, &field)
+			alternativeFieldNames, _, fun := extension(typ, &field)
 			if alternativeFieldNames != nil {
-				fieldNames = alternativeFieldNames
+				extensionProviedFieldNames = alternativeFieldNames
+			}
+			if fun != nil {
+				fieldDecoders[fieldDecoderKey] = &funcDecoder{fun}
+			}
+		}
+		for _, extension := range cfg.extensions {
+			alternativeFieldNames, _, fun := extension(typ, &field)
+			if alternativeFieldNames != nil {
+				extensionProviedFieldNames = alternativeFieldNames
 			}
 			if fun != nil {
 				fieldDecoders[fieldDecoderKey] = &funcDecoder{fun}
@@ -73,21 +106,10 @@ func decoderOfStruct(typ reflect.Type) (Decoder, error) {
 		}
 		decoder := fieldDecoders[fieldDecoderKey]
 		tagParts := strings.Split(field.Tag.Get("json"), ",")
-		// if fieldNames set by extension, use theirs, otherwise try tags
-		if fieldNames == nil {
-			/// tagParts[0] always present, even if no tags
-			switch tagParts[0] {
-			case "":
-				fieldNames = []string{field.Name}
-			case "-":
-				fieldNames = []string{}
-			default:
-				fieldNames = []string{tagParts[0]}
-			}
-		}
-		if decoder == nil {
+		fieldNames := calcFieldNames(field.Name, tagParts[0], extensionProviedFieldNames)
+		if decoder == nil && len(fieldNames) > 0 {
 			var err error
-			decoder, err = decoderOfType(field.Type)
+			decoder, err = decoderOfType(cfg, field.Type)
 			if err != nil {
 				return prefix(fmt.Sprintf("{%s}", field.Name)).addToDecoder(decoder, err)
 			}
@@ -102,9 +124,33 @@ func decoderOfStruct(typ reflect.Type) (Decoder, error) {
 	return createStructDecoder(typ, fields)
 }
 
+func calcFieldNames(originalFieldName string, tagProvidedFieldName string, extensionProvidedFieldNames []string) []string {
+	// tag => extension => exported? => original
+	isNotExported := unicode.IsLower(rune(originalFieldName[0]))
+	var fieldNames []string
+	/// tagParts[0] always present, even if no tags
+	switch tagProvidedFieldName {
+	case "":
+		if extensionProvidedFieldNames != nil {
+			fieldNames = extensionProvidedFieldNames
+		} else {
+			if isNotExported {
+				fieldNames = []string{}
+			} else {
+				fieldNames = []string{originalFieldName}
+			}
+		}
+	case "-":
+		fieldNames = []string{}
+	default:
+		fieldNames = []string{tagProvidedFieldName}
+	}
+	return fieldNames
+}
+
 func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder) (Decoder, error) {
 	knownHash := map[int32]struct{}{
-		0: struct{}{},
+		0: {},
 	}
 	switch len(fields) {
 	case 0:
@@ -591,11 +637,11 @@ func (decoder *oneFieldStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator)
 }
 
 type twoFieldsStructDecoder struct {
-	typ            reflect.Type
-	fieldHash1     int32
-	fieldDecoder1  *structFieldDecoder
-	fieldHash2     int32
-	fieldDecoder2  *structFieldDecoder
+	typ           reflect.Type
+	fieldHash1    int32
+	fieldDecoder1 *structFieldDecoder
+	fieldHash2    int32
+	fieldDecoder2 *structFieldDecoder
 }
 
 func (decoder *twoFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
@@ -621,13 +667,13 @@ func (decoder *twoFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator
 }
 
 type threeFieldsStructDecoder struct {
-	typ            reflect.Type
-	fieldHash1     int32
-	fieldDecoder1  *structFieldDecoder
-	fieldHash2     int32
-	fieldDecoder2  *structFieldDecoder
-	fieldHash3     int32
-	fieldDecoder3  *structFieldDecoder
+	typ           reflect.Type
+	fieldHash1    int32
+	fieldDecoder1 *structFieldDecoder
+	fieldHash2    int32
+	fieldDecoder2 *structFieldDecoder
+	fieldHash3    int32
+	fieldDecoder3 *structFieldDecoder
 }
 
 func (decoder *threeFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
@@ -655,15 +701,15 @@ func (decoder *threeFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterat
 }
 
 type fourFieldsStructDecoder struct {
-	typ            reflect.Type
-	fieldHash1     int32
-	fieldDecoder1  *structFieldDecoder
-	fieldHash2     int32
-	fieldDecoder2  *structFieldDecoder
-	fieldHash3     int32
-	fieldDecoder3  *structFieldDecoder
-	fieldHash4     int32
-	fieldDecoder4  *structFieldDecoder
+	typ           reflect.Type
+	fieldHash1    int32
+	fieldDecoder1 *structFieldDecoder
+	fieldHash2    int32
+	fieldDecoder2 *structFieldDecoder
+	fieldHash3    int32
+	fieldDecoder3 *structFieldDecoder
+	fieldHash4    int32
+	fieldDecoder4 *structFieldDecoder
 }
 
 func (decoder *fourFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
@@ -693,17 +739,17 @@ func (decoder *fourFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterato
 }
 
 type fiveFieldsStructDecoder struct {
-	typ            reflect.Type
-	fieldHash1     int32
-	fieldDecoder1  *structFieldDecoder
-	fieldHash2     int32
-	fieldDecoder2  *structFieldDecoder
-	fieldHash3     int32
-	fieldDecoder3  *structFieldDecoder
-	fieldHash4     int32
-	fieldDecoder4  *structFieldDecoder
-	fieldHash5     int32
-	fieldDecoder5  *structFieldDecoder
+	typ           reflect.Type
+	fieldHash1    int32
+	fieldDecoder1 *structFieldDecoder
+	fieldHash2    int32
+	fieldDecoder2 *structFieldDecoder
+	fieldHash3    int32
+	fieldDecoder3 *structFieldDecoder
+	fieldHash4    int32
+	fieldDecoder4 *structFieldDecoder
+	fieldHash5    int32
+	fieldDecoder5 *structFieldDecoder
 }
 
 func (decoder *fiveFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
@@ -735,19 +781,19 @@ func (decoder *fiveFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterato
 }
 
 type sixFieldsStructDecoder struct {
-	typ            reflect.Type
-	fieldHash1     int32
-	fieldDecoder1  *structFieldDecoder
-	fieldHash2     int32
-	fieldDecoder2  *structFieldDecoder
-	fieldHash3     int32
-	fieldDecoder3  *structFieldDecoder
-	fieldHash4     int32
-	fieldDecoder4  *structFieldDecoder
-	fieldHash5     int32
-	fieldDecoder5  *structFieldDecoder
-	fieldHash6     int32
-	fieldDecoder6  *structFieldDecoder
+	typ           reflect.Type
+	fieldHash1    int32
+	fieldDecoder1 *structFieldDecoder
+	fieldHash2    int32
+	fieldDecoder2 *structFieldDecoder
+	fieldHash3    int32
+	fieldDecoder3 *structFieldDecoder
+	fieldHash4    int32
+	fieldDecoder4 *structFieldDecoder
+	fieldHash5    int32
+	fieldDecoder5 *structFieldDecoder
+	fieldHash6    int32
+	fieldDecoder6 *structFieldDecoder
 }
 
 func (decoder *sixFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
@@ -781,21 +827,21 @@ func (decoder *sixFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator
 }
 
 type sevenFieldsStructDecoder struct {
-	typ            reflect.Type
-	fieldHash1     int32
-	fieldDecoder1  *structFieldDecoder
-	fieldHash2     int32
-	fieldDecoder2  *structFieldDecoder
-	fieldHash3     int32
-	fieldDecoder3  *structFieldDecoder
-	fieldHash4     int32
-	fieldDecoder4  *structFieldDecoder
-	fieldHash5     int32
-	fieldDecoder5  *structFieldDecoder
-	fieldHash6     int32
-	fieldDecoder6  *structFieldDecoder
-	fieldHash7     int32
-	fieldDecoder7  *structFieldDecoder
+	typ           reflect.Type
+	fieldHash1    int32
+	fieldDecoder1 *structFieldDecoder
+	fieldHash2    int32
+	fieldDecoder2 *structFieldDecoder
+	fieldHash3    int32
+	fieldDecoder3 *structFieldDecoder
+	fieldHash4    int32
+	fieldDecoder4 *structFieldDecoder
+	fieldHash5    int32
+	fieldDecoder5 *structFieldDecoder
+	fieldHash6    int32
+	fieldDecoder6 *structFieldDecoder
+	fieldHash7    int32
+	fieldDecoder7 *structFieldDecoder
 }
 
 func (decoder *sevenFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
@@ -831,23 +877,23 @@ func (decoder *sevenFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterat
 }
 
 type eightFieldsStructDecoder struct {
-	typ            reflect.Type
-	fieldHash1     int32
-	fieldDecoder1  *structFieldDecoder
-	fieldHash2     int32
-	fieldDecoder2  *structFieldDecoder
-	fieldHash3     int32
-	fieldDecoder3  *structFieldDecoder
-	fieldHash4     int32
-	fieldDecoder4  *structFieldDecoder
-	fieldHash5     int32
-	fieldDecoder5  *structFieldDecoder
-	fieldHash6     int32
-	fieldDecoder6  *structFieldDecoder
-	fieldHash7     int32
-	fieldDecoder7  *structFieldDecoder
-	fieldHash8     int32
-	fieldDecoder8  *structFieldDecoder
+	typ           reflect.Type
+	fieldHash1    int32
+	fieldDecoder1 *structFieldDecoder
+	fieldHash2    int32
+	fieldDecoder2 *structFieldDecoder
+	fieldHash3    int32
+	fieldDecoder3 *structFieldDecoder
+	fieldHash4    int32
+	fieldDecoder4 *structFieldDecoder
+	fieldHash5    int32
+	fieldDecoder5 *structFieldDecoder
+	fieldHash6    int32
+	fieldDecoder6 *structFieldDecoder
+	fieldHash7    int32
+	fieldDecoder7 *structFieldDecoder
+	fieldHash8    int32
+	fieldDecoder8 *structFieldDecoder
 }
 
 func (decoder *eightFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
@@ -885,25 +931,25 @@ func (decoder *eightFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterat
 }
 
 type nineFieldsStructDecoder struct {
-	typ            reflect.Type
-	fieldHash1     int32
-	fieldDecoder1  *structFieldDecoder
-	fieldHash2     int32
-	fieldDecoder2  *structFieldDecoder
-	fieldHash3     int32
-	fieldDecoder3  *structFieldDecoder
-	fieldHash4     int32
-	fieldDecoder4  *structFieldDecoder
-	fieldHash5     int32
-	fieldDecoder5  *structFieldDecoder
-	fieldHash6     int32
-	fieldDecoder6  *structFieldDecoder
-	fieldHash7     int32
-	fieldDecoder7  *structFieldDecoder
-	fieldHash8     int32
-	fieldDecoder8  *structFieldDecoder
-	fieldHash9     int32
-	fieldDecoder9  *structFieldDecoder
+	typ           reflect.Type
+	fieldHash1    int32
+	fieldDecoder1 *structFieldDecoder
+	fieldHash2    int32
+	fieldDecoder2 *structFieldDecoder
+	fieldHash3    int32
+	fieldDecoder3 *structFieldDecoder
+	fieldHash4    int32
+	fieldDecoder4 *structFieldDecoder
+	fieldHash5    int32
+	fieldDecoder5 *structFieldDecoder
+	fieldHash6    int32
+	fieldDecoder6 *structFieldDecoder
+	fieldHash7    int32
+	fieldDecoder7 *structFieldDecoder
+	fieldHash8    int32
+	fieldDecoder8 *structFieldDecoder
+	fieldHash9    int32
+	fieldDecoder9 *structFieldDecoder
 }
 
 func (decoder *nineFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
@@ -1021,6 +1067,7 @@ type structFieldEncoder struct {
 	field        *reflect.StructField
 	fieldName    string
 	fieldEncoder Encoder
+	omitempty    bool
 }
 
 func (encoder *structFieldEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
@@ -1033,29 +1080,63 @@ func (encoder *structFieldEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *structFieldEncoder) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	writeToStream(val, stream, encoder)
 }
 
+func (encoder *structFieldEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	fieldPtr := uintptr(ptr) + encoder.field.Offset
+	return encoder.fieldEncoder.isEmpty(unsafe.Pointer(fieldPtr))
+}
 
 type structEncoder struct {
-	firstField *structFieldEncoder
 	fields []*structFieldEncoder
 }
 
 func (encoder *structEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteObjectStart()
-	encoder.firstField.encode(ptr, stream)
+	isNotFirst := false
 	for _, field := range encoder.fields {
-		stream.WriteMore()
+		if field.omitempty && field.isEmpty(ptr) {
+			continue
+		}
+		if isNotFirst {
+			stream.WriteMore()
+		}
 		field.encode(ptr, stream)
+		isNotFirst = true
 	}
 	stream.WriteObjectEnd()
 }
 
 func (encoder *structEncoder) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
+	var encoderToUse Encoder
+	encoderToUse = encoder
+	if len(encoder.fields) == 1 {
+		firstEncoder := encoder.fields[0].fieldEncoder
+		firstEncoderName := reflect.TypeOf(firstEncoder).String()
+		// interface{} has inline optimization for this case
+		if firstEncoderName == "*jsoniter.optionalEncoder" {
+			encoderToUse = &structEncoder{
+				fields: []*structFieldEncoder{{
+					field:        encoder.fields[0].field,
+					fieldName:    encoder.fields[0].fieldName,
+					fieldEncoder: firstEncoder.(*optionalEncoder).valueEncoder,
+					omitempty:    encoder.fields[0].omitempty,
+				}},
+			}
+		}
+	}
+	writeToStream(val, stream, encoderToUse)
 }
 
+func (encoder *structEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	for _, field := range encoder.fields {
+		if !field.isEmpty(ptr) {
+			return false
+		}
+	}
+	return true
+}
 
 type emptyStructEncoder struct {
 }
@@ -1065,5 +1146,9 @@ func (encoder *emptyStructEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
 }
 
 func (encoder *emptyStructEncoder) encodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *emptyStructEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	return true
+}

feature_stream.go

@@ -5,16 +5,23 @@ import (
 )
 
 type Stream struct {
-	out           io.Writer
-	buf           []byte
-	n             int
-	Error         error
-	indention     int
-	IndentionStep int
+	cfg       *frozenConfig
+	out       io.Writer
+	buf       []byte
+	n         int
+	Error     error
+	indention int
 }
 
-func NewStream(out io.Writer, bufSize int) *Stream {
-	return &Stream{out, make([]byte, bufSize), 0, nil, 0, 0}
+func NewStream(cfg *frozenConfig, out io.Writer, bufSize int) *Stream {
+	return &Stream{
+		cfg:       cfg,
+		out:       out,
+		buf:       make([]byte, bufSize),
+		n:         0,
+		Error:     nil,
+		indention: 0,
+	}
 }
 
 func (b *Stream) Reset(out io.Writer) {
@@ -32,24 +39,32 @@ func (b *Stream) Buffered() int {
 	return b.n
 }
 
+func (b *Stream) Buffer() []byte {
+	return b.buf[:b.n]
+}
+
 // Write writes the contents of p into the buffer.
 // It returns the number of bytes written.
 // If nn < len(p), it also returns an error explaining
 // why the write is short.
 func (b *Stream) Write(p []byte) (nn int, err error) {
 	for len(p) > b.Available() && b.Error == nil {
-		var n int
-		if b.Buffered() == 0 {
-			// Large write, empty buffer.
-			// Write directly from p to avoid copy.
-			n, b.Error = b.out.Write(p)
+		if b.out == nil {
+			b.growAtLeast(len(p))
 		} else {
-			n = copy(b.buf[b.n:], p)
-			b.n += n
-			b.Flush()
+			var n int
+			if b.Buffered() == 0 {
+				// Large write, empty buffer.
+				// Write directly from p to avoid copy.
+				n, b.Error = b.out.Write(p)
+			} else {
+				n = copy(b.buf[b.n:], p)
+				b.n += n
+				b.Flush()
+			}
+			nn += n
+			p = p[n:]
 		}
-		nn += n
-		p = p[n:]
 	}
 	if b.Error != nil {
 		return nn, b.Error
@@ -60,14 +75,13 @@ func (b *Stream) Write(p []byte) (nn int, err error) {
 	return nn, nil
 }
 
-
 // WriteByte writes a single byte.
 func (b *Stream) writeByte(c byte) {
 	if b.Error != nil {
 		return
 	}
-	if b.Available() <= 0 && b.Flush() != nil {
-		return
+	if b.Available() < 1 {
+		b.growAtLeast(1)
 	}
 	b.buf[b.n] = c
 	b.n++
@@ -77,11 +91,11 @@ func (b *Stream) writeTwoBytes(c1 byte, c2 byte) {
 	if b.Error != nil {
 		return
 	}
-	if b.Available() <= 1 && b.Flush() != nil {
-		return
+	if b.Available() < 2 {
+		b.growAtLeast(2)
 	}
 	b.buf[b.n] = c1
-	b.buf[b.n + 1] = c2
+	b.buf[b.n+1] = c2
 	b.n += 2
 }
 
@@ -89,12 +103,12 @@ func (b *Stream) writeThreeBytes(c1 byte, c2 byte, c3 byte) {
 	if b.Error != nil {
 		return
 	}
-	if b.Available() <= 2 && b.Flush() != nil {
-		return
+	if b.Available() < 3 {
+		b.growAtLeast(3)
 	}
 	b.buf[b.n] = c1
-	b.buf[b.n + 1] = c2
-	b.buf[b.n + 2] = c3
+	b.buf[b.n+1] = c2
+	b.buf[b.n+2] = c3
 	b.n += 3
 }
 
@@ -102,13 +116,13 @@ func (b *Stream) writeFourBytes(c1 byte, c2 byte, c3 byte, c4 byte) {
 	if b.Error != nil {
 		return
 	}
-	if b.Available() <= 3 && b.Flush() != nil {
-		return
+	if b.Available() < 4 {
+		b.growAtLeast(4)
 	}
 	b.buf[b.n] = c1
-	b.buf[b.n + 1] = c2
-	b.buf[b.n + 2] = c3
-	b.buf[b.n + 3] = c4
+	b.buf[b.n+1] = c2
+	b.buf[b.n+2] = c3
+	b.buf[b.n+3] = c4
 	b.n += 4
 }
 
@@ -116,19 +130,22 @@ func (b *Stream) writeFiveBytes(c1 byte, c2 byte, c3 byte, c4 byte, c5 byte) {
 	if b.Error != nil {
 		return
 	}
-	if b.Available() <= 3 && b.Flush() != nil {
-		return
+	if b.Available() < 5 {
+		b.growAtLeast(5)
 	}
 	b.buf[b.n] = c1
-	b.buf[b.n + 1] = c2
-	b.buf[b.n + 2] = c3
-	b.buf[b.n + 3] = c4
-	b.buf[b.n + 4] = c5
+	b.buf[b.n+1] = c2
+	b.buf[b.n+2] = c3
+	b.buf[b.n+3] = c4
+	b.buf[b.n+4] = c5
 	b.n += 5
 }
 
 // Flush writes any buffered data to the underlying io.Writer.
 func (b *Stream) Flush() error {
+	if b.out == nil {
+		return nil
+	}
 	if b.Error != nil {
 		return b.Error
 	}
@@ -141,7 +158,7 @@ func (b *Stream) Flush() error {
 	}
 	if err != nil {
 		if n > 0 && n < b.n {
-			copy(b.buf[0:b.n - n], b.buf[n:b.n])
+			copy(b.buf[0:b.n-n], b.buf[n:b.n])
 		}
 		b.n -= n
 		b.Error = err
@@ -151,13 +168,28 @@ func (b *Stream) Flush() error {
 	return nil
 }
 
-func (b *Stream) WriteRaw(s string) {
-	for len(s) > b.Available() && b.Error == nil {
-		n := copy(b.buf[b.n:], s)
-		b.n += n
-		s = s[n:]
-		b.Flush()
+func (b *Stream) ensure(minimal int) {
+	available := b.Available()
+	if available < minimal {
+		if b.n > 1024 {
+			b.Flush()
+		}
+		b.growAtLeast(minimal)
 	}
+}
+
+func (b *Stream) growAtLeast(minimal int) {
+	toGrow := len(b.buf)
+	if toGrow < minimal {
+		toGrow = minimal
+	}
+	newBuf := make([]byte, len(b.buf)+toGrow)
+	copy(newBuf, b.Buffer())
+	b.buf = newBuf
+}
+
+func (b *Stream) WriteRaw(s string) {
+	b.ensure(len(s))
 	if b.Error != nil {
 		return
 	}
@@ -165,69 +197,6 @@ func (b *Stream) WriteRaw(s string) {
 	b.n += n
 }
 
-func (stream *Stream) WriteString(s string) {
-	valLen := len(s)
-	toWriteLen := valLen
-	bufLengthMinusTwo := len(stream.buf) - 2 // make room for the quotes
-	if stream.n + toWriteLen > bufLengthMinusTwo {
-		toWriteLen = bufLengthMinusTwo - stream.n
-	}
-	if toWriteLen < 0 {
-		stream.Flush()
-		if stream.n + toWriteLen > bufLengthMinusTwo {
-			toWriteLen = bufLengthMinusTwo - stream.n
-		}
-	}
-	n := stream.n
-	stream.buf[n] = '"'
-	n++
-	// write string, the fast path, without utf8 and escape support
-	i := 0
-	for ; i < toWriteLen; i++ {
-		c := s[i]
-		if c > 31 && c != '"' && c != '\\' {
-			stream.buf[n] = c
-			n++
-		} else {
-			break;
-		}
-	}
-	if i == valLen {
-		stream.buf[n] = '"'
-		n++
-		stream.n = n
-		return
-	}
-	stream.n = n
-	// for the remaining parts, we process them char by char
-	stream.writeStringSlowPath(s, i, valLen);
-	stream.writeByte('"')
-}
-
-func (stream *Stream) writeStringSlowPath(s string, i int, valLen int) {
-	for ; i < valLen; i++ {
-		c := s[i]
-		switch (c) {
-		case '"':
-			stream.writeTwoBytes('\\', '"')
-		case '\\':
-			stream.writeTwoBytes('\\', '\\')
-		case '\b':
-			stream.writeTwoBytes('\\', 'b')
-		case '\f':
-			stream.writeTwoBytes('\\', 'f')
-		case '\n':
-			stream.writeTwoBytes('\\', 'n')
-		case '\r':
-			stream.writeTwoBytes('\\', 'r')
-		case '\t':
-			stream.writeTwoBytes('\\', 't')
-		default:
-			stream.writeByte(c);
-		}
-	}
-}
-
 func (stream *Stream) WriteNil() {
 	stream.writeFourBytes('n', 'u', 'l', 'l')
 }
@@ -249,7 +218,7 @@ func (stream *Stream) WriteBool(val bool) {
 }
 
 func (stream *Stream) WriteObjectStart() {
-	stream.indention += stream.IndentionStep
+	stream.indention += stream.cfg.indentionStep
 	stream.writeByte('{')
 	stream.writeIndention(0)
 }
@@ -260,8 +229,8 @@ func (stream *Stream) WriteObjectField(field string) {
 }
 
 func (stream *Stream) WriteObjectEnd() {
-	stream.writeIndention(stream.IndentionStep)
-	stream.indention -= stream.IndentionStep
+	stream.writeIndention(stream.cfg.indentionStep)
+	stream.indention -= stream.cfg.indentionStep
 	stream.writeByte('}')
 }
 
@@ -276,7 +245,7 @@ func (stream *Stream) WriteMore() {
 }
 
 func (stream *Stream) WriteArrayStart() {
-	stream.indention += stream.IndentionStep
+	stream.indention += stream.cfg.indentionStep
 	stream.writeByte('[')
 	stream.writeIndention(0)
 }
@@ -287,27 +256,20 @@ func (stream *Stream) WriteEmptyArray() {
 }
 
 func (stream *Stream) WriteArrayEnd() {
-	stream.writeIndention(stream.IndentionStep)
-	stream.indention -= stream.IndentionStep
+	stream.writeIndention(stream.cfg.indentionStep)
+	stream.indention -= stream.cfg.indentionStep
 	stream.writeByte(']')
 }
 
 func (stream *Stream) writeIndention(delta int) {
-	if (stream.indention == 0) {
+	if stream.indention == 0 {
 		return
 	}
 	stream.writeByte('\n')
 	toWrite := stream.indention - delta
-	i := 0
-	for {
-		for ; i < toWrite && stream.n < len(stream.buf); i++ {
-			stream.buf[stream.n] = ' '
-			stream.n ++
-		}
-		if i == toWrite {
-			break;
-		} else {
-			stream.Flush()
-		}
+	stream.ensure(toWrite)
+	for i := 0; i < toWrite && stream.n < len(stream.buf); i++ {
+		stream.buf[stream.n] = ' '
+		stream.n++
 	}
-}
+}

feature_stream_float.go

@@ -4,68 +4,72 @@ import (
 	"strconv"
 )
 
-var POW10 []uint64
+var _POW10 []uint64
 
 func init() {
-	POW10 = []uint64{1, 10, 100, 1000, 10000, 100000, 1000000}
+	_POW10 = []uint64{1, 10, 100, 1000, 10000, 100000, 1000000}
 }
 
 func (stream *Stream) WriteFloat32(val float32) {
+	stream.WriteRaw(strconv.FormatFloat(float64(val), 'f', -1, 32))
+}
+
+func (stream *Stream) WriteFloat32Lossy(val float32) {
 	if val < 0 {
 		stream.writeByte('-')
 		val = -val
 	}
 	if val > 0x4ffffff {
-		stream.WriteRaw(strconv.FormatFloat(float64(val), 'f', -1, 32));
+		stream.WriteRaw(strconv.FormatFloat(float64(val), 'f', -1, 32))
 		return
 	}
 	precision := 6
 	exp := uint64(1000000) // 6
-	lval := uint64(float64(val) * float64(exp) + 0.5)
+	lval := uint64(float64(val)*float64(exp) + 0.5)
 	stream.WriteUint64(lval / exp)
 	fval := lval % exp
 	if fval == 0 {
 		return
 	}
 	stream.writeByte('.')
-	if stream.Available() < 10 {
-		stream.Flush()
-	}
-	for p := precision - 1; p > 0 && fval < POW10[p]; p-- {
+	stream.ensure(10)
+	for p := precision - 1; p > 0 && fval < _POW10[p]; p-- {
 		stream.writeByte('0')
 	}
-	stream.WriteUint64(fval);
-	for stream.buf[stream.n - 1] == '0' {
-		stream.n--;
+	stream.WriteUint64(fval)
+	for stream.buf[stream.n-1] == '0' {
+		stream.n--
 	}
 }
 
 func (stream *Stream) WriteFloat64(val float64) {
+	stream.WriteRaw(strconv.FormatFloat(float64(val), 'f', -1, 64))
+}
+
+func (stream *Stream) WriteFloat64Lossy(val float64) {
 	if val < 0 {
 		stream.writeByte('-')
 		val = -val
 	}
 	if val > 0x4ffffff {
-		stream.WriteRaw(strconv.FormatFloat(val, 'f', -1, 64));
+		stream.WriteRaw(strconv.FormatFloat(val, 'f', -1, 64))
 		return
 	}
 	precision := 6
 	exp := uint64(1000000) // 6
-	lval := uint64(val * float64(exp) + 0.5)
+	lval := uint64(val*float64(exp) + 0.5)
 	stream.WriteUint64(lval / exp)
 	fval := lval % exp
 	if fval == 0 {
 		return
 	}
 	stream.writeByte('.')
-	if stream.Available() < 10 {
-		stream.Flush()
-	}
-	for p := precision - 1; p > 0 && fval < POW10[p]; p-- {
+	stream.ensure(10)
+	for p := precision - 1; p > 0 && fval < _POW10[p]; p-- {
 		stream.writeByte('0')
 	}
-	stream.WriteUint64(fval);
-	for stream.buf[stream.n - 1] == '0' {
-		stream.n--;
+	stream.WriteUint64(fval)
+	for stream.buf[stream.n-1] == '0' {
+		stream.n--
 	}
-}
+}

feature_stream_int.go

@@ -1,50 +1,15 @@
 package jsoniter
 
-var digits []uint8
-var digitTens []uint8
-var digitOnes []uint8
-var DIGITS []uint32
+var _DIGITS []uint32
 
 func init() {
-	digits = []uint8{
-		'0', '1', '2', '3', '4', '5',
-		'6', '7', '8', '9', 'a', 'b',
-		'c', 'd', 'e', 'f', 'g', 'h',
-		'i', 'j', 'k', 'l', 'm', 'n',
-		'o', 'p', 'q', 'r', 's', 't',
-		'u', 'v', 'w', 'x', 'y', 'z',
-	}
-	digitTens = []uint8{
-		'0', '0', '0', '0', '0', '0', '0', '0', '0', '0',
-		'1', '1', '1', '1', '1', '1', '1', '1', '1', '1',
-		'2', '2', '2', '2', '2', '2', '2', '2', '2', '2',
-		'3', '3', '3', '3', '3', '3', '3', '3', '3', '3',
-		'4', '4', '4', '4', '4', '4', '4', '4', '4', '4',
-		'5', '5', '5', '5', '5', '5', '5', '5', '5', '5',
-		'6', '6', '6', '6', '6', '6', '6', '6', '6', '6',
-		'7', '7', '7', '7', '7', '7', '7', '7', '7', '7',
-		'8', '8', '8', '8', '8', '8', '8', '8', '8', '8',
-		'9', '9', '9', '9', '9', '9', '9', '9', '9', '9',
-	}
-	digitOnes = []uint8{
-		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-	}
-	DIGITS = make([]uint32, 1000)
+	_DIGITS = make([]uint32, 1000)
 	for i := uint32(0); i < 1000; i++ {
-		DIGITS[i] = (((i / 100) + '0') << 16) + ((((i / 10) % 10) + '0') << 8) + i % 10 + '0';
+		_DIGITS[i] = (((i / 100) + '0') << 16) + ((((i / 10) % 10) + '0') << 8) + i%10 + '0'
 		if i < 10 {
-			DIGITS[i] += 2 << 24
+			_DIGITS[i] += 2 << 24
 		} else if i < 100 {
-			DIGITS[i] += 1 << 24
+			_DIGITS[i] += 1 << 24
 		}
 	}
 }
@@ -67,56 +32,48 @@ func writeFirstBuf(buf []byte, v uint32, n int) int {
 
 func writeBuf(buf []byte, v uint32, n int) {
 	buf[n] = byte(v >> 16)
-	buf[n + 1] = byte(v >> 8)
-	buf[n + 2] = byte(v)
+	buf[n+1] = byte(v >> 8)
+	buf[n+2] = byte(v)
 }
 
 func (stream *Stream) WriteUint8(val uint8) {
-	if stream.Available() < 3 {
-		stream.Flush()
-	}
-	stream.n = writeFirstBuf(stream.buf, DIGITS[val], stream.n)
+	stream.ensure(3)
+	stream.n = writeFirstBuf(stream.buf, _DIGITS[val], stream.n)
 }
 
 func (stream *Stream) WriteInt8(nval int8) {
-	if stream.Available() < 4 {
-		stream.Flush()
-	}
+	stream.ensure(4)
 	n := stream.n
 	var val uint8
-	if (nval < 0) {
+	if nval < 0 {
 		val = uint8(-nval)
 		stream.buf[n] = '-'
 		n++
 	} else {
 		val = uint8(nval)
 	}
-	stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
+	stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
 }
 
 func (stream *Stream) WriteUint16(val uint16) {
-	if stream.Available() < 5 {
-		stream.Flush()
-	}
+	stream.ensure(5)
 	q1 := val / 1000
 	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, DIGITS[val], stream.n)
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], stream.n)
 		return
 	}
-	r1 := val - q1 * 1000;
-	n := writeFirstBuf(stream.buf, DIGITS[q1], stream.n)
-	writeBuf(stream.buf, DIGITS[r1], n)
+	r1 := val - q1*1000
+	n := writeFirstBuf(stream.buf, _DIGITS[q1], stream.n)
+	writeBuf(stream.buf, _DIGITS[r1], n)
 	stream.n = n + 3
 	return
 }
 
 func (stream *Stream) WriteInt16(nval int16) {
-	if stream.Available() < 6 {
-		stream.Flush()
-	}
+	stream.ensure(6)
 	n := stream.n
 	var val uint16
-	if (nval < 0) {
+	if nval < 0 {
 		val = uint16(-nval)
 		stream.buf[n] = '-'
 		n++
@@ -125,57 +82,53 @@ func (stream *Stream) WriteInt16(nval int16) {
 	}
 	q1 := val / 1000
 	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
 		return
 	}
-	r1 := val - q1 * 1000;
-	n = writeFirstBuf(stream.buf, DIGITS[q1], n)
-	writeBuf(stream.buf, DIGITS[r1], n)
+	r1 := val - q1*1000
+	n = writeFirstBuf(stream.buf, _DIGITS[q1], n)
+	writeBuf(stream.buf, _DIGITS[r1], n)
 	stream.n = n + 3
 	return
 }
 
 func (stream *Stream) WriteUint32(val uint32) {
-	if stream.Available() < 10 {
-		stream.Flush()
-	}
+	stream.ensure(10)
 	n := stream.n
 	q1 := val / 1000
 	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
 		return
 	}
-	r1 := val - q1 * 1000;
+	r1 := val - q1*1000
 	q2 := q1 / 1000
 	if q2 == 0 {
-		n := writeFirstBuf(stream.buf, DIGITS[q1], n)
-		writeBuf(stream.buf, DIGITS[r1], n)
+		n := writeFirstBuf(stream.buf, _DIGITS[q1], n)
+		writeBuf(stream.buf, _DIGITS[r1], n)
 		stream.n = n + 3
 		return
 	}
-	r2 := q1 - q2 * 1000
+	r2 := q1 - q2*1000
 	q3 := q2 / 1000
 	if q3 == 0 {
-		n = writeFirstBuf(stream.buf, DIGITS[q2], n)
+		n = writeFirstBuf(stream.buf, _DIGITS[q2], n)
 	} else {
-		r3 := q2 - q3 * 1000
+		r3 := q2 - q3*1000
 		stream.buf[n] = byte(q3 + '0')
 		n++
-		writeBuf(stream.buf, DIGITS[r3], n)
+		writeBuf(stream.buf, _DIGITS[r3], n)
 		n += 3
 	}
-	writeBuf(stream.buf, DIGITS[r2], n)
-	writeBuf(stream.buf, DIGITS[r1], n + 3)
+	writeBuf(stream.buf, _DIGITS[r2], n)
+	writeBuf(stream.buf, _DIGITS[r1], n+3)
 	stream.n = n + 6
 }
 
 func (stream *Stream) WriteInt32(nval int32) {
-	if stream.Available() < 11 {
-		stream.Flush()
-	}
+	stream.ensure(11)
 	n := stream.n
 	var val uint32
-	if (nval < 0) {
+	if nval < 0 {
 		val = uint32(-nval)
 		stream.buf[n] = '-'
 		n++
@@ -184,106 +137,102 @@ func (stream *Stream) WriteInt32(nval int32) {
 	}
 	q1 := val / 1000
 	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
 		return
 	}
-	r1 := val - q1 * 1000;
+	r1 := val - q1*1000
 	q2 := q1 / 1000
 	if q2 == 0 {
-		n := writeFirstBuf(stream.buf, DIGITS[q1], n)
-		writeBuf(stream.buf, DIGITS[r1], n)
+		n := writeFirstBuf(stream.buf, _DIGITS[q1], n)
+		writeBuf(stream.buf, _DIGITS[r1], n)
 		stream.n = n + 3
 		return
 	}
-	r2 := q1 - q2 * 1000
+	r2 := q1 - q2*1000
 	q3 := q2 / 1000
 	if q3 == 0 {
-		n = writeFirstBuf(stream.buf, DIGITS[q2], n)
+		n = writeFirstBuf(stream.buf, _DIGITS[q2], n)
 	} else {
-		r3 := q2 - q3 * 1000
+		r3 := q2 - q3*1000
 		stream.buf[n] = byte(q3 + '0')
 		n++
-		writeBuf(stream.buf, DIGITS[r3], n)
+		writeBuf(stream.buf, _DIGITS[r3], n)
 		n += 3
 	}
-	writeBuf(stream.buf, DIGITS[r2], n)
-	writeBuf(stream.buf, DIGITS[r1], n + 3)
+	writeBuf(stream.buf, _DIGITS[r2], n)
+	writeBuf(stream.buf, _DIGITS[r1], n+3)
 	stream.n = n + 6
 }
 
 func (stream *Stream) WriteUint64(val uint64) {
-	if stream.Available() < 20 {
-		stream.Flush()
-	}
+	stream.ensure(20)
 	n := stream.n
 	q1 := val / 1000
 	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
 		return
 	}
-	r1 := val - q1 * 1000;
+	r1 := val - q1*1000
 	q2 := q1 / 1000
 	if q2 == 0 {
-		n := writeFirstBuf(stream.buf, DIGITS[q1], n)
-		writeBuf(stream.buf, DIGITS[r1], n)
+		n := writeFirstBuf(stream.buf, _DIGITS[q1], n)
+		writeBuf(stream.buf, _DIGITS[r1], n)
 		stream.n = n + 3
 		return
 	}
-	r2 := q1 - q2 * 1000
+	r2 := q1 - q2*1000
 	q3 := q2 / 1000
 	if q3 == 0 {
-		n = writeFirstBuf(stream.buf, DIGITS[q2], n)
-		writeBuf(stream.buf, DIGITS[r2], n)
-		writeBuf(stream.buf, DIGITS[r1], n + 3)
+		n = writeFirstBuf(stream.buf, _DIGITS[q2], n)
+		writeBuf(stream.buf, _DIGITS[r2], n)
+		writeBuf(stream.buf, _DIGITS[r1], n+3)
 		stream.n = n + 6
 		return
 	}
-	r3 := q2 - q3 * 1000
+	r3 := q2 - q3*1000
 	q4 := q3 / 1000
 	if q4 == 0 {
-		n = writeFirstBuf(stream.buf, DIGITS[q3], n)
-		writeBuf(stream.buf, DIGITS[r3], n)
-		writeBuf(stream.buf, DIGITS[r2], n + 3)
-		writeBuf(stream.buf, DIGITS[r1], n + 6)
+		n = writeFirstBuf(stream.buf, _DIGITS[q3], n)
+		writeBuf(stream.buf, _DIGITS[r3], n)
+		writeBuf(stream.buf, _DIGITS[r2], n+3)
+		writeBuf(stream.buf, _DIGITS[r1], n+6)
 		stream.n = n + 9
 		return
 	}
-	r4 := q3 - q4 * 1000
+	r4 := q3 - q4*1000
 	q5 := q4 / 1000
 	if q5 == 0 {
-		n = writeFirstBuf(stream.buf, DIGITS[q4], n)
-		writeBuf(stream.buf, DIGITS[r4], n)
-		writeBuf(stream.buf, DIGITS[r3], n + 3)
-		writeBuf(stream.buf, DIGITS[r2], n + 6)
-		writeBuf(stream.buf, DIGITS[r1], n + 9)
+		n = writeFirstBuf(stream.buf, _DIGITS[q4], n)
+		writeBuf(stream.buf, _DIGITS[r4], n)
+		writeBuf(stream.buf, _DIGITS[r3], n+3)
+		writeBuf(stream.buf, _DIGITS[r2], n+6)
+		writeBuf(stream.buf, _DIGITS[r1], n+9)
 		stream.n = n + 12
 		return
 	}
-	r5 := q4 - q5 * 1000
+	r5 := q4 - q5*1000
 	q6 := q5 / 1000
 	if q6 == 0 {
-		n = writeFirstBuf(stream.buf, DIGITS[q5], n)
+		n = writeFirstBuf(stream.buf, _DIGITS[q5], n)
 	} else {
-		n = writeFirstBuf(stream.buf, DIGITS[q6], n)
-		r6 := q5 - q6 * 1000
-		writeBuf(stream.buf, DIGITS[r6], n)
+		n = writeFirstBuf(stream.buf, _DIGITS[q6], n)
+		r6 := q5 - q6*1000
+		writeBuf(stream.buf, _DIGITS[r6], n)
 		n += 3
 	}
-	writeBuf(stream.buf, DIGITS[r5], n)
-	writeBuf(stream.buf, DIGITS[r4], n + 3)
-	writeBuf(stream.buf, DIGITS[r3], n + 6)
-	writeBuf(stream.buf, DIGITS[r2], n + 9)
-	writeBuf(stream.buf, DIGITS[r1], n + 12)
+	writeBuf(stream.buf, _DIGITS[r5], n)
+	writeBuf(stream.buf, _DIGITS[r4], n+3)
+	writeBuf(stream.buf, _DIGITS[r3], n+6)
+	writeBuf(stream.buf, _DIGITS[r2], n+9)
+	writeBuf(stream.buf, _DIGITS[r1], n+12)
 	stream.n = n + 15
 }
 
 func (stream *Stream) WriteInt64(nval int64) {
-	if stream.Available() < 20 {
-		stream.Flush()
-	}
+	stream.ensure(20)
 	n := stream.n
 	var val uint64
-	if (nval < 0) {
+	if nval < 0 {
 		val = uint64(-nval)
 		stream.buf[n] = '-'
 		n++
@@ -292,63 +241,63 @@ func (stream *Stream) WriteInt64(nval int64) {
 	}
 	q1 := val / 1000
 	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
 		return
 	}
-	r1 := val - q1 * 1000;
+	r1 := val - q1*1000
 	q2 := q1 / 1000
 	if q2 == 0 {
-		n := writeFirstBuf(stream.buf, DIGITS[q1], n)
-		writeBuf(stream.buf, DIGITS[r1], n)
+		n := writeFirstBuf(stream.buf, _DIGITS[q1], n)
+		writeBuf(stream.buf, _DIGITS[r1], n)
 		stream.n = n + 3
 		return
 	}
-	r2 := q1 - q2 * 1000
+	r2 := q1 - q2*1000
 	q3 := q2 / 1000
 	if q3 == 0 {
-		n = writeFirstBuf(stream.buf, DIGITS[q2], n)
-		writeBuf(stream.buf, DIGITS[r2], n)
-		writeBuf(stream.buf, DIGITS[r1], n + 3)
+		n = writeFirstBuf(stream.buf, _DIGITS[q2], n)
+		writeBuf(stream.buf, _DIGITS[r2], n)
+		writeBuf(stream.buf, _DIGITS[r1], n+3)
 		stream.n = n + 6
 		return
 	}
-	r3 := q2 - q3 * 1000
+	r3 := q2 - q3*1000
 	q4 := q3 / 1000
 	if q4 == 0 {
-		n = writeFirstBuf(stream.buf, DIGITS[q3], n)
-		writeBuf(stream.buf, DIGITS[r3], n)
-		writeBuf(stream.buf, DIGITS[r2], n + 3)
-		writeBuf(stream.buf, DIGITS[r1], n + 6)
+		n = writeFirstBuf(stream.buf, _DIGITS[q3], n)
+		writeBuf(stream.buf, _DIGITS[r3], n)
+		writeBuf(stream.buf, _DIGITS[r2], n+3)
+		writeBuf(stream.buf, _DIGITS[r1], n+6)
 		stream.n = n + 9
 		return
 	}
-	r4 := q3 - q4 * 1000
+	r4 := q3 - q4*1000
 	q5 := q4 / 1000
 	if q5 == 0 {
-		n = writeFirstBuf(stream.buf, DIGITS[q4], n)
-		writeBuf(stream.buf, DIGITS[r4], n)
-		writeBuf(stream.buf, DIGITS[r3], n + 3)
-		writeBuf(stream.buf, DIGITS[r2], n + 6)
-		writeBuf(stream.buf, DIGITS[r1], n + 9)
+		n = writeFirstBuf(stream.buf, _DIGITS[q4], n)
+		writeBuf(stream.buf, _DIGITS[r4], n)
+		writeBuf(stream.buf, _DIGITS[r3], n+3)
+		writeBuf(stream.buf, _DIGITS[r2], n+6)
+		writeBuf(stream.buf, _DIGITS[r1], n+9)
 		stream.n = n + 12
 		return
 	}
-	r5 := q4 - q5 * 1000
+	r5 := q4 - q5*1000
 	q6 := q5 / 1000
 	if q6 == 0 {
-		n = writeFirstBuf(stream.buf, DIGITS[q5], n)
+		n = writeFirstBuf(stream.buf, _DIGITS[q5], n)
 	} else {
 		stream.buf[n] = byte(q6 + '0')
 		n++
-		r6 := q5 - q6 * 1000
-		writeBuf(stream.buf, DIGITS[r6], n)
+		r6 := q5 - q6*1000
+		writeBuf(stream.buf, _DIGITS[r6], n)
 		n += 3
 	}
-	writeBuf(stream.buf, DIGITS[r5], n)
-	writeBuf(stream.buf, DIGITS[r4], n + 3)
-	writeBuf(stream.buf, DIGITS[r3], n + 6)
-	writeBuf(stream.buf, DIGITS[r2], n + 9)
-	writeBuf(stream.buf, DIGITS[r1], n + 12)
+	writeBuf(stream.buf, _DIGITS[r5], n)
+	writeBuf(stream.buf, _DIGITS[r4], n+3)
+	writeBuf(stream.buf, _DIGITS[r3], n+6)
+	writeBuf(stream.buf, _DIGITS[r2], n+9)
+	writeBuf(stream.buf, _DIGITS[r1], n+12)
 	stream.n = n + 15
 }
 
@@ -358,4 +307,4 @@ func (stream *Stream) WriteInt(val int) {
 
 func (stream *Stream) WriteUint(val uint) {
 	stream.WriteUint64(uint64(val))
-}
+}

feature_stream_string.go

@@ -0,0 +1,351 @@
+package jsoniter
+
+import (
+	"unicode/utf8"
+)
+
+// htmlSafeSet holds the value true if the ASCII character with the given
+// array position can be safely represented inside a JSON string, embedded
+// inside of HTML <script> tags, without any additional escaping.
+//
+// All values are true except for the ASCII control characters (0-31), the
+// double quote ("), the backslash character ("\"), HTML opening and closing
+// tags ("<" and ">"), and the ampersand ("&").
+var htmlSafeSet = [utf8.RuneSelf]bool{
+	' ':      true,
+	'!':      true,
+	'"':      false,
+	'#':      true,
+	'$':      true,
+	'%':      true,
+	'&':      false,
+	'\'':     true,
+	'(':      true,
+	')':      true,
+	'*':      true,
+	'+':      true,
+	',':      true,
+	'-':      true,
+	'.':      true,
+	'/':      true,
+	'0':      true,
+	'1':      true,
+	'2':      true,
+	'3':      true,
+	'4':      true,
+	'5':      true,
+	'6':      true,
+	'7':      true,
+	'8':      true,
+	'9':      true,
+	':':      true,
+	';':      true,
+	'<':      false,
+	'=':      true,
+	'>':      false,
+	'?':      true,
+	'@':      true,
+	'A':      true,
+	'B':      true,
+	'C':      true,
+	'D':      true,
+	'E':      true,
+	'F':      true,
+	'G':      true,
+	'H':      true,
+	'I':      true,
+	'J':      true,
+	'K':      true,
+	'L':      true,
+	'M':      true,
+	'N':      true,
+	'O':      true,
+	'P':      true,
+	'Q':      true,
+	'R':      true,
+	'S':      true,
+	'T':      true,
+	'U':      true,
+	'V':      true,
+	'W':      true,
+	'X':      true,
+	'Y':      true,
+	'Z':      true,
+	'[':      true,
+	'\\':     false,
+	']':      true,
+	'^':      true,
+	'_':      true,
+	'`':      true,
+	'a':      true,
+	'b':      true,
+	'c':      true,
+	'd':      true,
+	'e':      true,
+	'f':      true,
+	'g':      true,
+	'h':      true,
+	'i':      true,
+	'j':      true,
+	'k':      true,
+	'l':      true,
+	'm':      true,
+	'n':      true,
+	'o':      true,
+	'p':      true,
+	'q':      true,
+	'r':      true,
+	's':      true,
+	't':      true,
+	'u':      true,
+	'v':      true,
+	'w':      true,
+	'x':      true,
+	'y':      true,
+	'z':      true,
+	'{':      true,
+	'|':      true,
+	'}':      true,
+	'~':      true,
+	'\u007f': true,
+}
+
+// safeSet holds the value true if the ASCII character with the given array
+// position can be represented inside a JSON string without any further
+// escaping.
+//
+// All values are true except for the ASCII control characters (0-31), the
+// double quote ("), and the backslash character ("\").
+var safeSet = [utf8.RuneSelf]bool{
+	' ':      true,
+	'!':      true,
+	'"':      false,
+	'#':      true,
+	'$':      true,
+	'%':      true,
+	'&':      true,
+	'\'':     true,
+	'(':      true,
+	')':      true,
+	'*':      true,
+	'+':      true,
+	',':      true,
+	'-':      true,
+	'.':      true,
+	'/':      true,
+	'0':      true,
+	'1':      true,
+	'2':      true,
+	'3':      true,
+	'4':      true,
+	'5':      true,
+	'6':      true,
+	'7':      true,
+	'8':      true,
+	'9':      true,
+	':':      true,
+	';':      true,
+	'<':      true,
+	'=':      true,
+	'>':      true,
+	'?':      true,
+	'@':      true,
+	'A':      true,
+	'B':      true,
+	'C':      true,
+	'D':      true,
+	'E':      true,
+	'F':      true,
+	'G':      true,
+	'H':      true,
+	'I':      true,
+	'J':      true,
+	'K':      true,
+	'L':      true,
+	'M':      true,
+	'N':      true,
+	'O':      true,
+	'P':      true,
+	'Q':      true,
+	'R':      true,
+	'S':      true,
+	'T':      true,
+	'U':      true,
+	'V':      true,
+	'W':      true,
+	'X':      true,
+	'Y':      true,
+	'Z':      true,
+	'[':      true,
+	'\\':     false,
+	']':      true,
+	'^':      true,
+	'_':      true,
+	'`':      true,
+	'a':      true,
+	'b':      true,
+	'c':      true,
+	'd':      true,
+	'e':      true,
+	'f':      true,
+	'g':      true,
+	'h':      true,
+	'i':      true,
+	'j':      true,
+	'k':      true,
+	'l':      true,
+	'm':      true,
+	'n':      true,
+	'o':      true,
+	'p':      true,
+	'q':      true,
+	'r':      true,
+	's':      true,
+	't':      true,
+	'u':      true,
+	'v':      true,
+	'w':      true,
+	'x':      true,
+	'y':      true,
+	'z':      true,
+	'{':      true,
+	'|':      true,
+	'}':      true,
+	'~':      true,
+	'\u007f': true,
+}
+
+var hex = "0123456789abcdef"
+
+func (stream *Stream) WriteStringWithHtmlEscaped(s string) {
+	stream.ensure(32)
+	valLen := len(s)
+	toWriteLen := valLen
+	bufLengthMinusTwo := len(stream.buf) - 2 // make room for the quotes
+	if stream.n+toWriteLen > bufLengthMinusTwo {
+		toWriteLen = bufLengthMinusTwo - stream.n
+	}
+	n := stream.n
+	stream.buf[n] = '"'
+	n++
+	// write string, the fast path, without utf8 and escape support
+	i := 0
+	for ; i < toWriteLen; i++ {
+		c := s[i]
+		if c <= utf8.RuneSelf && htmlSafeSet[c] {
+			stream.buf[n] = c
+			n++
+		} else {
+			break
+		}
+	}
+	if i == valLen {
+		stream.buf[n] = '"'
+		n++
+		stream.n = n
+		return
+	}
+	stream.n = n
+	writeStringSlowPath(stream, htmlSafeSet, i, s, valLen)
+}
+
+func (stream *Stream) WriteString(s string) {
+	stream.ensure(32)
+	valLen := len(s)
+	toWriteLen := valLen
+	bufLengthMinusTwo := len(stream.buf) - 2 // make room for the quotes
+	if stream.n+toWriteLen > bufLengthMinusTwo {
+		toWriteLen = bufLengthMinusTwo - stream.n
+	}
+	n := stream.n
+	stream.buf[n] = '"'
+	n++
+	// write string, the fast path, without utf8 and escape support
+	i := 0
+	for ; i < toWriteLen; i++ {
+		c := s[i]
+		if c > 31 && c != '"' && c != '\\' {
+			stream.buf[n] = c
+			n++
+		} else {
+			break
+		}
+	}
+	if i == valLen {
+		stream.buf[n] = '"'
+		n++
+		stream.n = n
+		return
+	}
+	stream.n = n
+	writeStringSlowPath(stream, safeSet, i, s, valLen)
+}
+
+func writeStringSlowPath(stream *Stream, safeSet [utf8.RuneSelf]bool, i int, s string, valLen int) {
+	start := i
+	// for the remaining parts, we process them char by char
+	for ; i < valLen; i++ {
+		if b := s[i]; b < utf8.RuneSelf {
+			if safeSet[b] {
+				i++
+				continue
+			}
+			if start < i {
+				stream.WriteRaw(s[start:i])
+			}
+			switch b {
+			case '\\', '"':
+				stream.writeTwoBytes('\\', b)
+			case '\n':
+				stream.writeTwoBytes('\\', 'n')
+			case '\r':
+				stream.writeTwoBytes('\\', 'r')
+			case '\t':
+				stream.writeTwoBytes('\\', 't')
+			default:
+				// This encodes bytes < 0x20 except for \t, \n and \r.
+				// If escapeHTML is set, it also escapes <, >, and &
+				// because they can lead to security holes when
+				// user-controlled strings are rendered into JSON
+				// and served to some browsers.
+				stream.WriteRaw(`\u00`)
+				stream.writeTwoBytes(hex[b>>4], hex[b&0xF])
+			}
+			i++
+			start = i
+			continue
+		}
+		c, size := utf8.DecodeRuneInString(s[i:])
+		if c == utf8.RuneError && size == 1 {
+			if start < i {
+				stream.WriteRaw(s[start:i])
+			}
+			stream.WriteRaw(`\ufffd`)
+			i += size
+			start = i
+			continue
+		}
+		// U+2028 is LINE SEPARATOR.
+		// U+2029 is PARAGRAPH SEPARATOR.
+		// They are both technically valid characters in JSON strings,
+		// but don't work in JSONP, which has to be evaluated as JavaScript,
+		// and can lead to security holes there. It is valid JSON to
+		// escape them, so we do so unconditionally.
+		// See http://timelessrepo.com/json-isnt-a-javascript-subset for discussion.
+		if c == '\u2028' || c == '\u2029' {
+			if start < i {
+				stream.WriteRaw(s[start:i])
+			}
+			stream.WriteRaw(`\u202`)
+			stream.writeByte(hex[c&0xF])
+			i += size
+			start = i
+			continue
+		}
+		i += size
+	}
+	if start < len(s) {
+		stream.WriteRaw(s[start:])
+	}
+	stream.writeByte('"')
+}

jsoniter_adapter_test.go

@@ -0,0 +1,62 @@
+package jsoniter
+
+import (
+	"bytes"
+	"encoding/json"
+	"github.com/json-iterator/go/require"
+	"io/ioutil"
+	"testing"
+)
+
+func Test_new_decoder(t *testing.T) {
+	should := require.New(t)
+	decoder1 := json.NewDecoder(bytes.NewBufferString(`[1][2]`))
+	decoder2 := NewDecoder(bytes.NewBufferString(`[1][2]`))
+	arr1 := []int{}
+	should.Nil(decoder1.Decode(&arr1))
+	should.Equal([]int{1}, arr1)
+	arr2 := []int{}
+	should.True(decoder1.More())
+	buffered, _ := ioutil.ReadAll(decoder1.Buffered())
+	should.Equal("[2]", string(buffered))
+	should.Nil(decoder2.Decode(&arr2))
+	should.Equal([]int{1}, arr2)
+	should.True(decoder2.More())
+	buffered, _ = ioutil.ReadAll(decoder2.Buffered())
+	should.Equal("[2]", string(buffered))
+
+	should.Nil(decoder1.Decode(&arr1))
+	should.Equal([]int{2}, arr1)
+	should.False(decoder1.More())
+	should.Nil(decoder2.Decode(&arr2))
+	should.Equal([]int{2}, arr2)
+	should.False(decoder2.More())
+}
+
+func Test_new_encoder(t *testing.T) {
+	should := require.New(t)
+	buf1 := &bytes.Buffer{}
+	encoder1 := json.NewEncoder(buf1)
+	encoder1.SetEscapeHTML(false)
+	encoder1.Encode([]int{1})
+	should.Equal("[1]\n", buf1.String())
+	buf2 := &bytes.Buffer{}
+	encoder2 := NewEncoder(buf2)
+	encoder2.SetEscapeHTML(false)
+	encoder2.Encode([]int{1})
+	should.Equal("[1]", buf2.String())
+}
+
+func Test_use_number(t *testing.T) {
+	should := require.New(t)
+	decoder1 := json.NewDecoder(bytes.NewBufferString(`123`))
+	decoder1.UseNumber()
+	decoder2 := NewDecoder(bytes.NewBufferString(`123`))
+	decoder2.UseNumber()
+	var obj1 interface{}
+	should.Nil(decoder1.Decode(&obj1))
+	should.Equal(json.Number("123"), obj1)
+	var obj2 interface{}
+	should.Nil(decoder2.Decode(&obj2))
+	should.Equal(json.Number("123"), obj2)
+}

jsoniter_array_test.go

@@ -1,19 +1,19 @@
 package jsoniter
 
 import (
-	"encoding/json"
-	"testing"
-	"github.com/json-iterator/go/require"
 	"bytes"
+	"encoding/json"
+	"github.com/json-iterator/go/require"
 	"io"
+	"testing"
 )
 
 func Test_empty_array(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`[]`)
+	iter := ParseString(ConfigOfDefault, `[]`)
 	cont := iter.ReadArray()
 	should.False(cont)
-	iter = ParseString(`[]`)
+	iter = ParseString(ConfigOfDefault, `[]`)
 	iter.ReadArrayCB(func(iter *Iterator) bool {
 		should.FailNow("should not call")
 		return true
@@ -22,11 +22,11 @@ func Test_empty_array(t *testing.T) {
 
 func Test_one_element(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`[1]`)
+	iter := ParseString(ConfigOfDefault, `[1]`)
 	should.True(iter.ReadArray())
 	should.Equal(1, iter.ReadInt())
 	should.False(iter.ReadArray())
-	iter = ParseString(`[1]`)
+	iter = ParseString(ConfigOfDefault, `[1]`)
 	iter.ReadArrayCB(func(iter *Iterator) bool {
 		should.Equal(1, iter.ReadInt())
 		return true
@@ -35,13 +35,13 @@ func Test_one_element(t *testing.T) {
 
 func Test_two_elements(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`[1,2]`)
+	iter := ParseString(ConfigOfDefault, `[1,2]`)
 	should.True(iter.ReadArray())
 	should.Equal(int64(1), iter.ReadInt64())
 	should.True(iter.ReadArray())
 	should.Equal(int64(2), iter.ReadInt64())
 	should.False(iter.ReadArray())
-	iter = ParseString(`[1,2]`)
+	iter = ParseString(ConfigOfDefault, `[1,2]`)
 	should.Equal([]interface{}{float64(1), float64(2)}, iter.Read())
 }
 
@@ -84,7 +84,7 @@ func Test_read_array_with_any_iterator(t *testing.T) {
 
 func Test_wrap_array(t *testing.T) {
 	should := require.New(t)
-	any := Wrap([]int{1,2,3})
+	any := Wrap([]int{1, 2, 3})
 	should.Equal("[1,2,3]", any.ToString())
 	var element Any
 	var elements []int
@@ -93,9 +93,9 @@ func Test_wrap_array(t *testing.T) {
 		elements = append(elements, element.ToInt())
 	}
 	should.Equal([]int{1, 2, 3}, elements)
-	any = Wrap([]int{1,2,3})
+	any = Wrap([]int{1, 2, 3})
 	should.Equal(3, any.Size())
-	any = Wrap([]int{1,2,3})
+	any = Wrap([]int{1, 2, 3})
 	should.Equal(2, any.Get(1).ToInt())
 }
 
@@ -103,7 +103,7 @@ func Test_array_lazy_any_get(t *testing.T) {
 	should := require.New(t)
 	any, err := UnmarshalAnyFromString("[1,[2,3],4]")
 	should.Nil(err)
-	should.Equal(3, any.Get(1,1).ToInt())
+	should.Equal(3, any.Get(1, 1).ToInt())
 	should.Equal("[1,[2,3],4]", any.ToString())
 }
 
@@ -111,25 +111,25 @@ func Test_array_lazy_any_get_all(t *testing.T) {
 	should := require.New(t)
 	any, err := UnmarshalAnyFromString("[[1],[2],[3,4]]")
 	should.Nil(err)
-	should.Equal("[1,2,3]", any.Get('*',0).ToString())
+	should.Equal("[1,2,3]", any.Get('*', 0).ToString())
 }
 
 func Test_array_wrapper_any_get_all(t *testing.T) {
 	should := require.New(t)
 	any := wrapArray([][]int{
-		[]int{1, 2},
-		[]int{3, 4},
-		[]int{5, 6},
+		{1, 2},
+		{3, 4},
+		{5, 6},
 	})
-	should.Equal("[1,3,5]", any.Get('*',0).ToString())
+	should.Equal("[1,3,5]", any.Get('*', 0).ToString())
 }
 
 func Test_array_lazy_any_get_invalid(t *testing.T) {
 	should := require.New(t)
 	any, err := UnmarshalAnyFromString("[]")
 	should.Nil(err)
-	should.Equal(Invalid, any.Get(1,1).ValueType())
-	should.NotNil(any.Get(1,1).LastError())
+	should.Equal(Invalid, any.Get(1, 1).ValueType())
+	should.NotNil(any.Get(1, 1).LastError())
 	should.Equal(Invalid, any.Get("1").ValueType())
 	should.NotNil(any.Get("1").LastError())
 }
@@ -152,7 +152,7 @@ func Test_invalid_array(t *testing.T) {
 }
 
 func Test_whitespace_in_head(t *testing.T) {
-	iter := ParseString(` [1]`)
+	iter := ParseString(ConfigOfDefault, ` [1]`)
 	cont := iter.ReadArray()
 	if cont != true {
 		t.FailNow()
@@ -163,7 +163,7 @@ func Test_whitespace_in_head(t *testing.T) {
 }
 
 func Test_whitespace_after_array_start(t *testing.T) {
-	iter := ParseString(`[ 1]`)
+	iter := ParseString(ConfigOfDefault, `[ 1]`)
 	cont := iter.ReadArray()
 	if cont != true {
 		t.FailNow()
@@ -174,7 +174,7 @@ func Test_whitespace_after_array_start(t *testing.T) {
 }
 
 func Test_whitespace_before_array_end(t *testing.T) {
-	iter := ParseString(`[1 ]`)
+	iter := ParseString(ConfigOfDefault, `[1 ]`)
 	cont := iter.ReadArray()
 	if cont != true {
 		t.FailNow()
@@ -189,7 +189,7 @@ func Test_whitespace_before_array_end(t *testing.T) {
 }
 
 func Test_whitespace_before_comma(t *testing.T) {
-	iter := ParseString(`[1 ,2]`)
+	iter := ParseString(ConfigOfDefault, `[1 ,2]`)
 	cont := iter.ReadArray()
 	if cont != true {
 		t.FailNow()
@@ -213,8 +213,7 @@ func Test_whitespace_before_comma(t *testing.T) {
 func Test_write_array(t *testing.T) {
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 4096)
-	stream.IndentionStep = 2
+	stream := NewStream(Config{IndentionStep: 2}.Froze(), buf, 4096)
 	stream.WriteArrayStart()
 	stream.WriteInt(1)
 	stream.WriteMore()
@@ -228,7 +227,7 @@ func Test_write_array(t *testing.T) {
 func Test_write_val_array(t *testing.T) {
 	should := require.New(t)
 	val := []int{1, 2, 3}
-	str, err := MarshalToString(val)
+	str, err := MarshalToString(&val)
 	should.Nil(err)
 	should.Equal("[1,2,3]", str)
 }
@@ -244,19 +243,51 @@ func Test_write_val_empty_array(t *testing.T) {
 func Test_write_array_of_interface_in_struct(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
-		Field []interface{}
+		Field  []interface{}
 		Field2 string
 	}
 	val := TestObject{[]interface{}{1, 2}, ""}
 	str, err := MarshalToString(val)
 	should.Nil(err)
-	should.Equal(`{"Field":[1,2],"Field2":""}`, str)
+	should.Contains(str, `"Field":[1,2]`)
+	should.Contains(str, `"Field2":""`)
+}
+
+func Test_json_RawMessage(t *testing.T) {
+	should := require.New(t)
+	var data json.RawMessage
+	should.Nil(Unmarshal([]byte(`[1,2,3]`), &data))
+	should.Equal(`[1,2,3]`, string(data))
+	str, err := MarshalToString(data)
+	should.Nil(err)
+	should.Equal(`[1,2,3]`, str)
+}
+
+func Test_encode_byte_array(t *testing.T) {
+	should := require.New(t)
+	bytes, err := json.Marshal([]byte{1, 2, 3})
+	should.Nil(err)
+	should.Equal(`"AQID"`, string(bytes))
+	bytes, err = Marshal([]byte{1, 2, 3})
+	should.Nil(err)
+	should.Equal(`"AQID"`, string(bytes))
+}
+
+func Test_decode_byte_array(t *testing.T) {
+	should := require.New(t)
+	data := []byte{}
+	err := json.Unmarshal([]byte(`"AQID"`), &data)
+	should.Nil(err)
+	should.Equal([]byte{1, 2, 3}, data)
+	err = Unmarshal([]byte(`"AQID"`), &data)
+	should.Nil(err)
+	should.Equal([]byte{1, 2, 3}, data)
 }
 
 func Benchmark_jsoniter_array(b *testing.B) {
 	b.ReportAllocs()
 	input := []byte(`[1,2,3,4,5,6,7,8,9]`)
-	iter := ParseBytes(input)
+	iter := ParseBytes(ConfigOfDefault, input)
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
 		iter.ResetBytes(input)

jsoniter_bool_test.go

@@ -1,22 +1,22 @@
 package jsoniter
 
 import (
-	"testing"
 	"bytes"
 	"github.com/json-iterator/go/require"
+	"testing"
 )
 
 func Test_true(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`true`)
+	iter := ParseString(ConfigOfDefault, `true`)
 	should.True(iter.ReadBool())
-	iter = ParseString(`true`)
+	iter = ParseString(ConfigOfDefault, `true`)
 	should.Equal(true, iter.Read())
 }
 
 func Test_false(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`false`)
+	iter := ParseString(ConfigOfDefault, `false`)
 	should.False(iter.ReadBool())
 }
 
@@ -30,7 +30,7 @@ func Test_read_bool_as_any(t *testing.T) {
 func Test_write_true_false(t *testing.T) {
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	stream.WriteTrue()
 	stream.WriteFalse()
 	stream.Flush()
@@ -38,13 +38,12 @@ func Test_write_true_false(t *testing.T) {
 	should.Equal("truefalse", buf.String())
 }
 
-
 func Test_write_val_bool(t *testing.T) {
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	stream.WriteVal(true)
 	stream.Flush()
 	should.Nil(stream.Error)
 	should.Equal("true", buf.String())
-}
+}

jsoniter_customize_test.go

@@ -1,6 +1,8 @@
 package jsoniter
 
 import (
+	"encoding/json"
+	"github.com/json-iterator/go/require"
 	"reflect"
 	"strconv"
 	"testing"
@@ -17,7 +19,7 @@ func Test_customize_type_decoder(t *testing.T) {
 		}
 		*((*time.Time)(ptr)) = t
 	})
-	defer CleanDecoders()
+	defer ConfigOfDefault.CleanDecoders()
 	val := time.Time{}
 	err := Unmarshal([]byte(`"2016-12-05 08:43:28"`), &val)
 	if err != nil {
@@ -29,6 +31,41 @@ func Test_customize_type_decoder(t *testing.T) {
 	}
 }
 
+func Test_customize_type_encoder(t *testing.T) {
+	should := require.New(t)
+	RegisterTypeEncoder("time.Time", func(ptr unsafe.Pointer, stream *Stream) {
+		t := *((*time.Time)(ptr))
+		stream.WriteString(t.UTC().Format("2006-01-02 15:04:05"))
+	})
+	defer ConfigOfDefault.CleanEncoders()
+	val := time.Unix(0, 0)
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`"1970-01-01 00:00:00"`, str)
+}
+
+func Test_customize_byte_array_encoder(t *testing.T) {
+	ConfigOfDefault.CleanEncoders()
+	should := require.New(t)
+	RegisterTypeEncoder("[]uint8", func(ptr unsafe.Pointer, stream *Stream) {
+		t := *((*[]byte)(ptr))
+		stream.WriteString(string(t))
+	})
+	defer ConfigOfDefault.CleanEncoders()
+	val := []byte("abc")
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`"abc"`, str)
+}
+
+func Test_customize_float_marshal(t *testing.T) {
+	should := require.New(t)
+	json := Config{MarshalFloatWith6Digits: true}.Froze()
+	str, err := json.MarshalToString(float32(1.23456789))
+	should.Nil(err)
+	should.Equal("1.234568", str)
+}
+
 type Tom struct {
 	field1 string
 }
@@ -37,7 +74,7 @@ func Test_customize_field_decoder(t *testing.T) {
 	RegisterFieldDecoder("jsoniter.Tom", "field1", func(ptr unsafe.Pointer, iter *Iterator) {
 		*((*string)(ptr)) = strconv.Itoa(iter.ReadInt())
 	})
-	defer CleanDecoders()
+	defer ConfigOfDefault.CleanDecoders()
 	tom := Tom{}
 	err := Unmarshal([]byte(`{"field1": 100}`), &tom)
 	if err != nil {
@@ -50,20 +87,129 @@ type TestObject1 struct {
 }
 
 func Test_customize_field_by_extension(t *testing.T) {
-	RegisterExtension(func(type_ reflect.Type, field *reflect.StructField) ([]string, DecoderFunc) {
+	should := require.New(t)
+	RegisterExtension(func(type_ reflect.Type, field *reflect.StructField) ([]string, EncoderFunc, DecoderFunc) {
 		if type_.String() == "jsoniter.TestObject1" && field.Name == "field1" {
-			return []string{"field-1"}, func(ptr unsafe.Pointer, iter *Iterator) {
+			encode := func(ptr unsafe.Pointer, stream *Stream) {
+				str := *((*string)(ptr))
+				val, _ := strconv.Atoi(str)
+				stream.WriteInt(val)
+			}
+			decode := func(ptr unsafe.Pointer, iter *Iterator) {
 				*((*string)(ptr)) = strconv.Itoa(iter.ReadInt())
 			}
+			return []string{"field-1"}, encode, decode
 		}
-		return nil, nil
+		return nil, nil, nil
 	})
 	obj := TestObject1{}
-	err := Unmarshal([]byte(`{"field-1": 100}`), &obj)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if obj.field1 != "100" {
-		t.Fatal(obj.field1)
-	}
+	err := UnmarshalFromString(`{"field-1": 100}`, &obj)
+	should.Nil(err)
+	should.Equal("100", obj.field1)
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"field-1":100}`, str)
+}
+
+func Test_unexported_fields(t *testing.T) {
+	jsoniter := Config{SupportUnexportedStructFields: true}.Froze()
+	should := require.New(t)
+	type TestObject struct {
+		field1 string
+		field2 string `json:"field-2"`
+	}
+	obj := TestObject{}
+	obj.field1 = "hello"
+	should.Nil(jsoniter.UnmarshalFromString(`{}`, &obj))
+	should.Equal("hello", obj.field1)
+	should.Nil(jsoniter.UnmarshalFromString(`{"field1": "world", "field-2": "abc"}`, &obj))
+	should.Equal("world", obj.field1)
+	should.Equal("abc", obj.field2)
+	str, err := jsoniter.MarshalToString(obj)
+	should.Nil(err)
+	should.Contains(str, `"field-2":"abc"`)
+}
+
+type ObjectImplementedMarshaler int
+
+func (obj *ObjectImplementedMarshaler) MarshalJSON() ([]byte, error) {
+	return []byte(`"hello"`), nil
+}
+
+func Test_marshaler(t *testing.T) {
+	type TestObject struct {
+		Field *ObjectImplementedMarshaler
+	}
+	should := require.New(t)
+	val := ObjectImplementedMarshaler(100)
+	obj := TestObject{&val}
+	bytes, err := json.Marshal(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":"hello"}`, string(bytes))
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":"hello"}`, str)
+}
+
+func Test_marshaler_and_encoder(t *testing.T) {
+	type TestObject struct {
+		Field *ObjectImplementedMarshaler
+	}
+	should := require.New(t)
+	RegisterTypeEncoder("jsoniter.ObjectImplementedMarshaler", func(ptr unsafe.Pointer, stream *Stream) {
+		stream.WriteString("hello from encoder")
+	})
+	val := ObjectImplementedMarshaler(100)
+	obj := TestObject{&val}
+	bytes, err := json.Marshal(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":"hello"}`, string(bytes))
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":"hello from encoder"}`, str)
+}
+
+type ObjectImplementedUnmarshaler int
+
+func (obj *ObjectImplementedUnmarshaler) UnmarshalJSON([]byte) error {
+	*obj = 100
+	return nil
+}
+
+func Test_unmarshaler(t *testing.T) {
+	type TestObject struct {
+		Field  *ObjectImplementedUnmarshaler
+		Field2 string
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	val := ObjectImplementedUnmarshaler(0)
+	obj.Field = &val
+	err := json.Unmarshal([]byte(`{"Field":"hello"}`), &obj)
+	should.Nil(err)
+	should.Equal(100, int(*obj.Field))
+	err = Unmarshal([]byte(`{"Field":"hello"}`), &obj)
+	should.Nil(err)
+	should.Equal(100, int(*obj.Field))
+}
+
+func Test_unmarshaler_and_decoder(t *testing.T) {
+	type TestObject struct {
+		Field  *ObjectImplementedUnmarshaler
+		Field2 string
+	}
+	should := require.New(t)
+	RegisterTypeDecoder("jsoniter.ObjectImplementedUnmarshaler", func(ptr unsafe.Pointer, iter *Iterator) {
+		*(*ObjectImplementedUnmarshaler)(ptr) = 10
+		iter.Skip()
+	})
+	obj := TestObject{}
+	val := ObjectImplementedUnmarshaler(0)
+	obj.Field = &val
+	err := json.Unmarshal([]byte(`{"Field":"hello"}`), &obj)
+	should.Nil(err)
+	should.Equal(100, int(*obj.Field))
+	err = Unmarshal([]byte(`{"Field":"hello"}`), &obj)
+	should.Nil(err)
+	should.Equal(10, int(*obj.Field))
 }

jsoniter_demo_test.go

@@ -1,19 +1,22 @@
 package jsoniter
 
 import (
+	"encoding/json"
 	"fmt"
+	"github.com/json-iterator/go/require"
 	"testing"
 )
 
 func Test_bind_api_demo(t *testing.T) {
-	iter := ParseString(`[0,1,2,3]`)
+	should := require.New(t)
 	val := []int{}
-	iter.ReadVal(&val)
-	fmt.Println(val[3])
+	err := UnmarshalFromString(`[0,1,2,3]  `, &val)
+	should.Nil(err)
+	should.Equal([]int{0, 1, 2, 3}, val)
 }
 
 func Test_iterator_api_demo(t *testing.T) {
-	iter := ParseString(`[0,1,2,3]`)
+	iter := ParseString(ConfigOfDefault, `[0,1,2,3]`)
 	total := 0
 	for iter.ReadArray() {
 		total += iter.ReadInt()
@@ -21,19 +24,63 @@ func Test_iterator_api_demo(t *testing.T) {
 	fmt.Println(total)
 }
 
-type User struct {
-	userID int
-	name   string
-	tags   []string
+type People struct {
+	Name    string
+	Gender  string
+	Age     int
+	Address string
+	Mobile  string
+	Country string
+	Height  int
 }
 
-func Test_iterator_and_bind_api(t *testing.T) {
-	iter := ParseString(`[123, {"name": "taowen", "tags": ["crazy", "hacker"]}]`)
-	user := User{}
-	iter.ReadArray()
-	user.userID = iter.ReadInt()
-	iter.ReadArray()
-	iter.ReadVal(&user)
-	iter.ReadArray() // array end
-	fmt.Println(user)
-}
+func jsoniterMarshal(p *People) error {
+	_, err := Marshal(p)
+	if nil != err {
+		return err
+	}
+	return nil
+}
+func stdMarshal(p *People) error {
+	_, err := json.Marshal(p)
+	if nil != err {
+		return err
+	}
+	return nil
+}
+
+func BenchmarkJosniterMarshal(b *testing.B) {
+	var p People
+	p.Address = "上海市徐汇区漕宝路"
+	p.Age = 30
+	p.Country = "中国"
+	p.Gender = "male"
+	p.Height = 170
+	p.Mobile = "18502120533"
+	p.Name = "Elvin"
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		err := jsoniterMarshal(&p)
+		if nil != err {
+			b.Error(err)
+		}
+	}
+}
+
+func BenchmarkStdMarshal(b *testing.B) {
+	var p People
+	p.Address = "上海市徐汇区漕宝路"
+	p.Age = 30
+	p.Country = "中国"
+	p.Gender = "male"
+	p.Height = 170
+	p.Mobile = "18502120533"
+	p.Name = "Elvin"
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		err := stdMarshal(&p)
+		if nil != err {
+			b.Error(err)
+		}
+	}
+}

jsoniter_find_end_test.go

@@ -1,62 +1,62 @@
 package jsoniter
 
 import (
+	"github.com/json-iterator/go/require"
 	"io"
 	"testing"
-	"github.com/json-iterator/go/require"
 )
 
 func Test_string_end(t *testing.T) {
-	end, escaped := ParseString(`abc"`).findStringEnd()
+	end, escaped := ParseString(ConfigOfDefault, `abc"`).findStringEnd()
 	if end != 4 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`abc\\"`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\\"`).findStringEnd()
 	if end != 6 {
 		t.Fatal(end)
 	}
 	if escaped != true {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`abc\\\\"`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\\\\"`).findStringEnd()
 	if end != 8 {
 		t.Fatal(end)
 	}
 	if escaped != true {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`abc\"`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\"`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`abc\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != true {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`abc\\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`\\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `\\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
@@ -91,54 +91,54 @@ func (reader *StagedReader) Read(p []byte) (n int, err error) {
 
 func Test_skip_string(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`"abc`)
+	iter := ParseString(ConfigOfDefault, `"abc`)
 	iter.skipString()
 	should.Equal(1, iter.head)
-	iter = ParseString(`\""abc`)
+	iter = ParseString(ConfigOfDefault, `\""abc`)
 	iter.skipString()
 	should.Equal(3, iter.head)
 	reader := &StagedReader{
 		r1: `abc`,
 		r2: `"`,
 	}
-	iter = Parse(reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
 	should.Equal(1, iter.head)
 	reader = &StagedReader{
 		r1: `abc`,
 		r2: `1"`,
 	}
-	iter = Parse(reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
 	should.Equal(2, iter.head)
 	reader = &StagedReader{
 		r1: `abc\`,
 		r2: `"`,
 	}
-	iter = Parse(reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
 	should.NotNil(iter.Error)
 	reader = &StagedReader{
 		r1: `abc\`,
 		r2: `""`,
 	}
-	iter = Parse(reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
 	should.Equal(2, iter.head)
 }
 
 func Test_skip_object(t *testing.T) {
-	iter := ParseString(`}`)
+	iter := ParseString(ConfigOfDefault, `}`)
 	iter.skipObject()
 	if iter.head != 1 {
 		t.Fatal(iter.head)
 	}
-	iter = ParseString(`a}`)
+	iter = ParseString(ConfigOfDefault, `a}`)
 	iter.skipObject()
 	if iter.head != 2 {
 		t.Fatal(iter.head)
 	}
-	iter = ParseString(`{}}a`)
+	iter = ParseString(ConfigOfDefault, `{}}a`)
 	iter.skipObject()
 	if iter.head != 3 {
 		t.Fatal(iter.head)
@@ -147,12 +147,12 @@ func Test_skip_object(t *testing.T) {
 		r1: `{`,
 		r2: `}}a`,
 	}
-	iter = Parse(reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipObject()
 	if iter.head != 2 {
 		t.Fatal(iter.head)
 	}
-	iter = ParseString(`"}"}a`)
+	iter = ParseString(ConfigOfDefault, `"}"}a`)
 	iter.skipObject()
 	if iter.head != 4 {
 		t.Fatal(iter.head)

jsoniter_float_test.go

@@ -1,28 +1,44 @@
 package jsoniter
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
-	"testing"
 	"github.com/json-iterator/go/require"
-	"bytes"
 	"strconv"
+	"testing"
 )
 
+func Test_read_big_float(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `12.3`)
+	val := iter.ReadBigFloat()
+	val64, _ := val.Float64()
+	should.Equal(12.3, val64)
+}
+
+func Test_read_big_int(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `92233720368547758079223372036854775807`)
+	val := iter.ReadBigInt()
+	should.NotNil(val)
+	should.Equal(`92233720368547758079223372036854775807`, val.String())
+}
+
 func Test_read_float(t *testing.T) {
 	inputs := []string{`1.1`, `1000`, `9223372036854775807`, `12.3`, `-12.3`, `720368.54775807`, `720368.547758075`}
 	for _, input := range inputs {
 		// non-streaming
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(input + ",")
+			iter := ParseString(ConfigOfDefault, input+",")
 			expected, err := strconv.ParseFloat(input, 32)
 			should.Nil(err)
 			should.Equal(float32(expected), iter.ReadFloat32())
 		})
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(input + ",")
+			iter := ParseString(ConfigOfDefault, input+",")
 			expected, err := strconv.ParseFloat(input, 64)
 			should.Nil(err)
 			should.Equal(expected, iter.ReadFloat64())
@@ -30,14 +46,14 @@ func Test_read_float(t *testing.T) {
 		// streaming
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := Parse(bytes.NewBufferString(input + ","), 2)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input+","), 2)
 			expected, err := strconv.ParseFloat(input, 32)
 			should.Nil(err)
 			should.Equal(float32(expected), iter.ReadFloat32())
 		})
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := Parse(bytes.NewBufferString(input + ","), 2)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input+","), 2)
 			expected, err := strconv.ParseFloat(input, 64)
 			should.Nil(err)
 			should.Equal(expected, iter.ReadFloat64())
@@ -47,7 +63,7 @@ func Test_read_float(t *testing.T) {
 
 func Test_read_float_as_interface(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`12.3`)
+	iter := ParseString(ConfigOfDefault, `12.3`)
 	should.Equal(float64(12.3), iter.Read())
 }
 
@@ -69,13 +85,13 @@ func Test_wrap_float(t *testing.T) {
 
 func Test_write_float32(t *testing.T) {
 	vals := []float32{0, 1, -1, 99, 0xff, 0xfff, 0xffff, 0xfffff, 0xffffff, 0x4ffffff, 0xfffffff,
-	-0x4ffffff, -0xfffffff, 1.2345, 1.23456, 1.234567, 1.001}
+		-0x4ffffff, -0xfffffff, 1.2345, 1.23456, 1.234567, 1.001}
 	for _, val := range vals {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
-			stream.WriteFloat32(val)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteFloat32Lossy(val)
 			stream.Flush()
 			should.Nil(stream.Error)
 			should.Equal(strconv.FormatFloat(float64(val), 'f', -1, 32), buf.String())
@@ -83,7 +99,7 @@ func Test_write_float32(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -92,9 +108,9 @@ func Test_write_float32(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 10)
+	stream := NewStream(ConfigOfDefault, buf, 10)
 	stream.WriteRaw("abcdefg")
-	stream.WriteFloat32(1.123456)
+	stream.WriteFloat32Lossy(1.123456)
 	stream.Flush()
 	should.Nil(stream.Error)
 	should.Equal("abcdefg1.123456", buf.String())
@@ -102,13 +118,13 @@ func Test_write_float32(t *testing.T) {
 
 func Test_write_float64(t *testing.T) {
 	vals := []float64{0, 1, -1, 99, 0xff, 0xfff, 0xffff, 0xfffff, 0xffffff, 0x4ffffff, 0xfffffff,
-	-0x4ffffff, -0xfffffff, 1.2345, 1.23456, 1.234567, 1.001}
+		-0x4ffffff, -0xfffffff, 1.2345, 1.23456, 1.234567, 1.001}
 	for _, val := range vals {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
-			stream.WriteFloat64(val)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteFloat64Lossy(val)
 			stream.Flush()
 			should.Nil(stream.Error)
 			should.Equal(strconv.FormatFloat(val, 'f', -1, 64), buf.String())
@@ -116,7 +132,7 @@ func Test_write_float64(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -125,18 +141,40 @@ func Test_write_float64(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 10)
+	stream := NewStream(ConfigOfDefault, buf, 10)
 	stream.WriteRaw("abcdefg")
-	stream.WriteFloat64(1.123456)
+	stream.WriteFloat64Lossy(1.123456)
 	stream.Flush()
 	should.Nil(stream.Error)
 	should.Equal("abcdefg1.123456", buf.String())
 }
 
+func Test_read_float64_cursor(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, "[1.23456789\n,2,3]")
+	should.True(iter.ReadArray())
+	should.Equal(1.23456789, iter.Read())
+	should.True(iter.ReadArray())
+	should.Equal(float64(2), iter.Read())
+}
+
+func Test_read_float_scientific(t *testing.T) {
+	should := require.New(t)
+	var obj interface{}
+	should.Nil(UnmarshalFromString(`1e1`, &obj))
+	should.Equal(float64(10), obj)
+	should.Nil(json.Unmarshal([]byte(`1e1`), &obj))
+	should.Equal(float64(10), obj)
+	should.Nil(UnmarshalFromString(`1.0e1`, &obj))
+	should.Equal(float64(10), obj)
+	should.Nil(json.Unmarshal([]byte(`1.0e1`), &obj))
+	should.Equal(float64(10), obj)
+}
+
 func Benchmark_jsoniter_float(b *testing.B) {
 	b.ReportAllocs()
 	input := []byte(`1.1123,`)
-	iter := NewIterator()
+	iter := NewIterator(ConfigOfDefault)
 	for n := 0; n < b.N; n++ {
 		iter.ResetBytes(input)
 		iter.ReadFloat64()

jsoniter_int_test.go

@@ -3,17 +3,17 @@ package jsoniter
 import (
 	"bytes"
 	"encoding/json"
-	"testing"
-	"github.com/json-iterator/go/require"
 	"fmt"
-	"strconv"
-	"io/ioutil"
+	"github.com/json-iterator/go/require"
 	"io"
+	"io/ioutil"
+	"strconv"
+	"testing"
 )
 
 func Test_read_uint64_invalid(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(",")
+	iter := ParseString(ConfigOfDefault, ",")
 	iter.ReadUint64()
 	should.NotNil(iter.Error)
 }
@@ -23,7 +23,7 @@ func Test_read_int8(t *testing.T) {
 	for _, input := range inputs {
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(input)
+			iter := ParseString(ConfigOfDefault, input)
 			expected, err := strconv.ParseInt(input, 10, 8)
 			should.Nil(err)
 			should.Equal(int8(expected), iter.ReadInt8())
@@ -36,7 +36,7 @@ func Test_read_int16(t *testing.T) {
 	for _, input := range inputs {
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(input)
+			iter := ParseString(ConfigOfDefault, input)
 			expected, err := strconv.ParseInt(input, 10, 16)
 			should.Nil(err)
 			should.Equal(int16(expected), iter.ReadInt16())
@@ -49,14 +49,14 @@ func Test_read_int32(t *testing.T) {
 	for _, input := range inputs {
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(input)
+			iter := ParseString(ConfigOfDefault, input)
 			expected, err := strconv.ParseInt(input, 10, 32)
 			should.Nil(err)
 			should.Equal(int32(expected), iter.ReadInt32())
 		})
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := Parse(bytes.NewBufferString(input), 2)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
 			expected, err := strconv.ParseInt(input, 10, 32)
 			should.Nil(err)
 			should.Equal(int32(expected), iter.ReadInt32())
@@ -83,7 +83,7 @@ func Test_read_int64_array(t *testing.T) {
 func Test_read_int32_overflow(t *testing.T) {
 	should := require.New(t)
 	input := "123456789123456789,"
-	iter := ParseString(input)
+	iter := ParseString(ConfigOfDefault, input)
 	iter.ReadInt32()
 	should.NotNil(iter.Error)
 }
@@ -93,14 +93,14 @@ func Test_read_int64(t *testing.T) {
 	for _, input := range inputs {
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(input)
+			iter := ParseString(ConfigOfDefault, input)
 			expected, err := strconv.ParseInt(input, 10, 64)
 			should.Nil(err)
 			should.Equal(expected, iter.ReadInt64())
 		})
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := Parse(bytes.NewBufferString(input), 2)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
 			expected, err := strconv.ParseInt(input, 10, 64)
 			should.Nil(err)
 			should.Equal(expected, iter.ReadInt64())
@@ -111,7 +111,7 @@ func Test_read_int64(t *testing.T) {
 func Test_read_int64_overflow(t *testing.T) {
 	should := require.New(t)
 	input := "123456789123456789123456789123456789,"
-	iter := ParseString(input)
+	iter := ParseString(ConfigOfDefault, input)
 	iter.ReadInt64()
 	should.NotNil(iter.Error)
 }
@@ -146,7 +146,7 @@ func Test_write_uint8(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteUint8(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -155,7 +155,7 @@ func Test_write_uint8(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -164,7 +164,7 @@ func Test_write_uint8(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 3)
+	stream := NewStream(ConfigOfDefault, buf, 3)
 	stream.WriteRaw("a")
 	stream.WriteUint8(100) // should clear buffer
 	stream.Flush()
@@ -178,7 +178,7 @@ func Test_write_int8(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteInt8(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -187,7 +187,7 @@ func Test_write_int8(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -196,7 +196,7 @@ func Test_write_int8(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 4)
+	stream := NewStream(ConfigOfDefault, buf, 4)
 	stream.WriteRaw("a")
 	stream.WriteInt8(-100) // should clear buffer
 	stream.Flush()
@@ -210,7 +210,7 @@ func Test_write_uint16(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteUint16(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -219,7 +219,7 @@ func Test_write_uint16(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -228,7 +228,7 @@ func Test_write_uint16(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 5)
+	stream := NewStream(ConfigOfDefault, buf, 5)
 	stream.WriteRaw("a")
 	stream.WriteUint16(10000) // should clear buffer
 	stream.Flush()
@@ -242,7 +242,7 @@ func Test_write_int16(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteInt16(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -251,7 +251,7 @@ func Test_write_int16(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -260,7 +260,7 @@ func Test_write_int16(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 6)
+	stream := NewStream(ConfigOfDefault, buf, 6)
 	stream.WriteRaw("a")
 	stream.WriteInt16(-10000) // should clear buffer
 	stream.Flush()
@@ -274,7 +274,7 @@ func Test_write_uint32(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteUint32(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -283,7 +283,7 @@ func Test_write_uint32(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -292,7 +292,7 @@ func Test_write_uint32(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 10)
+	stream := NewStream(ConfigOfDefault, buf, 10)
 	stream.WriteRaw("a")
 	stream.WriteUint32(0xffffffff) // should clear buffer
 	stream.Flush()
@@ -306,7 +306,7 @@ func Test_write_int32(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteInt32(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -315,7 +315,7 @@ func Test_write_int32(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -324,7 +324,7 @@ func Test_write_int32(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 11)
+	stream := NewStream(ConfigOfDefault, buf, 11)
 	stream.WriteRaw("a")
 	stream.WriteInt32(-0x7fffffff) // should clear buffer
 	stream.Flush()
@@ -340,7 +340,7 @@ func Test_write_uint64(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteUint64(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -349,7 +349,7 @@ func Test_write_uint64(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -358,7 +358,7 @@ func Test_write_uint64(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 10)
+	stream := NewStream(ConfigOfDefault, buf, 10)
 	stream.WriteRaw("a")
 	stream.WriteUint64(0xffffffff) // should clear buffer
 	stream.Flush()
@@ -374,7 +374,7 @@ func Test_write_int64(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteInt64(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -383,7 +383,7 @@ func Test_write_int64(t *testing.T) {
 		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
 			should := require.New(t)
 			buf := &bytes.Buffer{}
-			stream := NewStream(buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -392,7 +392,7 @@ func Test_write_int64(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 10)
+	stream := NewStream(ConfigOfDefault, buf, 10)
 	stream.WriteRaw("a")
 	stream.WriteInt64(0xffffffff) // should clear buffer
 	stream.Flush()
@@ -403,7 +403,7 @@ func Test_write_int64(t *testing.T) {
 func Test_write_val_int(t *testing.T) {
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	stream.WriteVal(1001)
 	stream.Flush()
 	should.Nil(stream.Error)
@@ -413,7 +413,7 @@ func Test_write_val_int(t *testing.T) {
 func Test_write_val_int_ptr(t *testing.T) {
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	val := 1001
 	stream.WriteVal(&val)
 	stream.Flush()
@@ -421,8 +421,19 @@ func Test_write_val_int_ptr(t *testing.T) {
 	should.Equal("1001", buf.String())
 }
 
+func Test_json_number(t *testing.T) {
+	should := require.New(t)
+	var arr []json.Number
+	err := Unmarshal([]byte(`[1]`), &arr)
+	should.Nil(err)
+	should.Equal(json.Number("1"), arr[0])
+	str, err := MarshalToString(arr)
+	should.Nil(err)
+	should.Equal(`[1]`, str)
+}
+
 func Benchmark_jsoniter_encode_int(b *testing.B) {
-	stream := NewStream(ioutil.Discard, 64)
+	stream := NewStream(ConfigOfDefault, ioutil.Discard, 64)
 	for n := 0; n < b.N; n++ {
 		stream.n = 0
 		stream.WriteUint64(0xffffffff)
@@ -436,7 +447,7 @@ func Benchmark_itoa(b *testing.B) {
 }
 
 func Benchmark_jsoniter_int(b *testing.B) {
-	iter := NewIterator()
+	iter := NewIterator(ConfigOfDefault)
 	input := []byte(`100`)
 	for n := 0; n < b.N; n++ {
 		iter.ResetBytes(input)

jsoniter_interface_test.go

@@ -1,8 +1,9 @@
 package jsoniter
 
 import (
-	"testing"
+	"encoding/json"
 	"github.com/json-iterator/go/require"
+	"testing"
 	"unsafe"
 )
 
@@ -16,7 +17,7 @@ func Test_write_array_of_interface(t *testing.T) {
 
 func Test_write_map_of_interface(t *testing.T) {
 	should := require.New(t)
-	val := map[string]interface{}{"hello":"world"}
+	val := map[string]interface{}{"hello": "world"}
 	str, err := MarshalToString(val)
 	should.Nil(err)
 	should.Equal(`{"hello":"world"}`, str)
@@ -27,7 +28,7 @@ func Test_write_map_of_interface_in_struct(t *testing.T) {
 		Field map[string]interface{}
 	}
 	should := require.New(t)
-	val := TestObject{map[string]interface{}{"hello":"world"}}
+	val := TestObject{map[string]interface{}{"hello": "world"}}
 	str, err := MarshalToString(val)
 	should.Nil(err)
 	should.Equal(`{"Field":{"hello":"world"}}`, str)
@@ -35,14 +36,14 @@ func Test_write_map_of_interface_in_struct(t *testing.T) {
 
 func Test_write_map_of_interface_in_struct_with_two_fields(t *testing.T) {
 	type TestObject struct {
-		Field map[string]interface{}
+		Field  map[string]interface{}
 		Field2 string
 	}
 	should := require.New(t)
-	val := TestObject{map[string]interface{}{"hello":"world"}, ""}
+	val := TestObject{map[string]interface{}{"hello": "world"}, ""}
 	str, err := MarshalToString(val)
 	should.Nil(err)
-	should.Equal(`{"Field":{"hello":"world"},"Field2":""}`, str)
+	should.Contains(str, `"Field":{"hello":"world"}`)
 }
 
 type MyInterface interface {
@@ -59,7 +60,7 @@ func Test_write_map_of_custom_interface(t *testing.T) {
 	should := require.New(t)
 	myStr := MyString("world")
 	should.Equal("world", myStr.Hello())
-	val := map[string]MyInterface{"hello":myStr}
+	val := map[string]MyInterface{"hello": myStr}
 	str, err := MarshalToString(val)
 	should.Nil(err)
 	should.Equal(`{"hello":"world"}`, str)
@@ -91,4 +92,63 @@ func Test_read_custom_interface(t *testing.T) {
 	err := UnmarshalFromString(`"hello"`, &val)
 	should.Nil(err)
 	should.Equal("hello", val.Hello())
-}
+}
+
+func Test_decode_object_contain_empty_interface(t *testing.T) {
+	type TestObject struct {
+		Field interface{}
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	obj.Field = 1024
+	should.Nil(UnmarshalFromString(`{"Field": "hello"}`, &obj))
+	should.Equal("hello", obj.Field)
+}
+
+func Test_decode_object_contain_non_empty_interface(t *testing.T) {
+	type TestObject struct {
+		Field MyInterface
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	obj.Field = MyString("abc")
+	should.Nil(UnmarshalFromString(`{"Field": "hello"}`, &obj))
+	should.Equal(MyString("hello"), obj.Field)
+}
+
+func Test_encode_object_contain_empty_interface(t *testing.T) {
+	type TestObject struct {
+		Field interface{}
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	obj.Field = 1024
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":1024}`, str)
+}
+
+func Test_encode_object_contain_non_empty_interface(t *testing.T) {
+	type TestObject struct {
+		Field MyInterface
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	obj.Field = MyString("hello")
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":"hello"}`, str)
+}
+
+func Test_nil_non_empty_interface(t *testing.T) {
+	ConfigOfDefault.CleanEncoders()
+	ConfigOfDefault.CleanDecoders()
+	type TestObject struct {
+		Field []MyInterface
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	b := []byte(`{"Field":["AAA"]}`)
+	should.NotNil(json.Unmarshal(b, &obj))
+	should.NotNil(Unmarshal(b, &obj))
+}

jsoniter_io_test.go

@@ -7,7 +7,7 @@ import (
 )
 
 func Test_read_by_one(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("abc"), 1)
+	iter := Parse(ConfigOfDefault, bytes.NewBufferString("abc"), 1)
 	b := iter.readByte()
 	if iter.Error != nil {
 		t.Fatal(iter.Error)
@@ -34,7 +34,7 @@ func Test_read_by_one(t *testing.T) {
 }
 
 func Test_read_by_two(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("abc"), 2)
+	iter := Parse(ConfigOfDefault, bytes.NewBufferString("abc"), 2)
 	b := iter.readByte()
 	if iter.Error != nil {
 		t.Fatal(iter.Error)
@@ -67,7 +67,7 @@ func Test_read_by_two(t *testing.T) {
 }
 
 func Test_read_until_eof(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("abc"), 2)
+	iter := Parse(ConfigOfDefault, bytes.NewBufferString("abc"), 2)
 	iter.readByte()
 	iter.readByte()
 	b := iter.readByte()

jsoniter_large_file_test.go

@@ -27,7 +27,7 @@ func Benchmark_jsoniter_large_file(b *testing.B) {
 	b.ReportAllocs()
 	for n := 0; n < b.N; n++ {
 		file, _ := os.Open("/tmp/large-file.json")
-		iter := Parse(file, 4096)
+		iter := Parse(ConfigOfDefault, file, 4096)
 		count := 0
 		for iter.ReadArray() {
 			iter.Skip()

jsoniter_map_test.go

@@ -1,13 +1,15 @@
 package jsoniter
 
 import (
-	"testing"
+	"encoding/json"
 	"github.com/json-iterator/go/require"
+	"math/big"
+	"testing"
 )
 
 func Test_read_map(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`{"hello": "world"}`)
+	iter := ParseString(ConfigOfDefault, `{"hello": "world"}`)
 	m := map[string]string{"1": "2"}
 	iter.ReadVal(&m)
 	copy(iter.buf, []byte{0, 0, 0, 0, 0, 0})
@@ -16,11 +18,11 @@ func Test_read_map(t *testing.T) {
 
 func Test_read_map_of_interface(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`{"hello": "world"}`)
+	iter := ParseString(ConfigOfDefault, `{"hello": "world"}`)
 	m := map[string]interface{}{"1": "2"}
 	iter.ReadVal(&m)
 	should.Equal(map[string]interface{}{"1": "2", "hello": "world"}, m)
-	iter = ParseString(`{"hello": "world"}`)
+	iter = ParseString(ConfigOfDefault, `{"hello": "world"}`)
 	should.Equal(map[string]interface{}{"hello": "world"}, iter.Read())
 }
 
@@ -40,12 +42,12 @@ func Test_wrap_map(t *testing.T) {
 			vals[k] = v.ToString()
 		}
 	}
-	should.Equal(map[string]string{"Field1":"hello"}, vals)
+	should.Equal(map[string]string{"Field1": "hello"}, vals)
 }
 
 func Test_map_wrapper_any_get_all(t *testing.T) {
 	should := require.New(t)
-	any := Wrap(map[string][]int{"Field1": []int{1, 2}})
+	any := Wrap(map[string][]int{"Field1": {1, 2}})
 	should.Equal(`{"Field1":1}`, any.Get('*', 0).ToString())
 }
 
@@ -56,3 +58,84 @@ func Test_write_val_map(t *testing.T) {
 	should.Nil(err)
 	should.Equal(`{"1":"2"}`, str)
 }
+
+func Test_slice_of_map(t *testing.T) {
+	should := require.New(t)
+	val := []map[string]string{{"1": "2"}}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`[{"1":"2"}]`, str)
+	val = []map[string]string{}
+	should.Nil(UnmarshalFromString(str, &val))
+	should.Equal("2", val[0]["1"])
+}
+
+func Test_encode_int_key_map(t *testing.T) {
+	should := require.New(t)
+	val := map[int]string{1: "2"}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`{"1":"2"}`, str)
+}
+
+func Test_decode_int_key_map(t *testing.T) {
+	should := require.New(t)
+	var val map[int]string
+	should.Nil(UnmarshalFromString(`{"1":"2"}`, &val))
+	should.Equal(map[int]string{1: "2"}, val)
+}
+
+func Test_encode_TextMarshaler_key_map(t *testing.T) {
+	should := require.New(t)
+	f, _, _ := big.ParseFloat("1", 10, 64, big.ToZero)
+	val := map[*big.Float]string{f: "2"}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`{"1":"2"}`, str)
+}
+
+func Test_decode_TextMarshaler_key_map(t *testing.T) {
+	should := require.New(t)
+	var val map[*big.Float]string
+	should.Nil(UnmarshalFromString(`{"1":"2"}`, &val))
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`{"1":"2"}`, str)
+}
+
+func Test_map_key_with_escaped_char(t *testing.T) {
+	type Ttest struct {
+		Map map[string]string
+	}
+	var jsonBytes = []byte(`
+	{
+	    "Map":{
+		"k\"ey": "val"
+	    }
+	}`)
+	should := require.New(t)
+	{
+		var obj Ttest
+		should.Nil(json.Unmarshal(jsonBytes, &obj))
+		should.Equal(map[string]string{"k\"ey": "val"}, obj.Map)
+	}
+	{
+		var obj Ttest
+		should.Nil(Unmarshal(jsonBytes, &obj))
+		should.Equal(map[string]string{"k\"ey": "val"}, obj.Map)
+	}
+}
+
+func Test_encode_map_with_sorted_keys(t *testing.T) {
+	should := require.New(t)
+	m := map[string]interface{}{
+		"3": 3,
+		"1": 1,
+		"2": 2,
+	}
+	bytes, err := json.Marshal(m)
+	should.Nil(err)
+	output, err := ConfigCompatibleWithStandardLibrary.MarshalToString(m)
+	should.Nil(err)
+	should.Equal(string(bytes), output)
+}

jsoniter_nested_test.go

@@ -15,7 +15,7 @@ type Level2 struct {
 }
 
 func Test_nested(t *testing.T) {
-	iter := ParseString(`{"hello": [{"world": "value1"}, {"world": "value2"}]}`)
+	iter := ParseString(ConfigOfDefault, `{"hello": [{"world": "value1"}, {"world": "value2"}]}`)
 	l1 := Level1{}
 	for l1Field := iter.ReadObject(); l1Field != ""; l1Field = iter.ReadObject() {
 		switch l1Field {
@@ -50,7 +50,7 @@ func Test_nested(t *testing.T) {
 
 func Benchmark_jsoniter_nested(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(`{"hello": [{"world": "value1"}, {"world": "value2"}]}`)
+		iter := ParseString(ConfigOfDefault, `{"hello": [{"world": "value1"}, {"world": "value2"}]}`)
 		l1 := Level1{}
 		for l1Field := iter.ReadObject(); l1Field != ""; l1Field = iter.ReadObject() {
 			switch l1Field {

jsoniter_null_test.go

@@ -1,18 +1,19 @@
 package jsoniter
 
 import (
-	"testing"
-	"github.com/json-iterator/go/require"
 	"bytes"
+	"encoding/json"
+	"github.com/json-iterator/go/require"
+	"testing"
 )
 
 func Test_read_null(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`null`)
+	iter := ParseString(ConfigOfDefault, `null`)
 	should.True(iter.ReadNil())
-	iter = ParseString(`null`)
+	iter = ParseString(ConfigOfDefault, `null`)
 	should.Nil(iter.Read())
-	iter = ParseString(`null`)
+	iter = ParseString(ConfigOfDefault, `null`)
 	any, err := UnmarshalAnyFromString(`null`)
 	should.Nil(err)
 	should.Equal(0, any.ToInt())
@@ -24,7 +25,7 @@ func Test_read_null(t *testing.T) {
 func Test_write_null(t *testing.T) {
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	stream.WriteNil()
 	stream.Flush()
 	should.Nil(stream.Error)
@@ -39,7 +40,8 @@ func Test_encode_null(t *testing.T) {
 }
 
 func Test_decode_null_object(t *testing.T) {
-	iter := ParseString(`[null,"a"]`)
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	iter.ReadArray()
 	if iter.ReadObject() != "" {
 		t.FailNow()
@@ -48,10 +50,16 @@ func Test_decode_null_object(t *testing.T) {
 	if iter.ReadString() != "a" {
 		t.FailNow()
 	}
+	type TestObject struct {
+		Field string
+	}
+	objs := []TestObject{}
+	should.Nil(UnmarshalFromString("[null]", &objs))
+	should.Len(objs, 1)
 }
 
 func Test_decode_null_array(t *testing.T) {
-	iter := ParseString(`[null,"a"]`)
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	iter.ReadArray()
 	if iter.ReadArray() != false {
 		t.FailNow()
@@ -64,15 +72,15 @@ func Test_decode_null_array(t *testing.T) {
 
 func Test_decode_null_string(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`[null,"a"]`)
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	should.True(iter.ReadArray())
-	should.True(iter.ReadNil())
+	should.Equal("", iter.ReadString())
 	should.True(iter.ReadArray())
 	should.Equal("a", iter.ReadString())
 }
 
 func Test_decode_null_skip(t *testing.T) {
-	iter := ParseString(`[null,"a"]`)
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -80,3 +88,39 @@ func Test_decode_null_skip(t *testing.T) {
 		t.FailNow()
 	}
 }
+
+func Test_encode_nil_map(t *testing.T) {
+	should := require.New(t)
+	type Ttest map[string]string
+	var obj1 Ttest
+	output, err := json.Marshal(obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = json.Marshal(&obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = Marshal(obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = Marshal(&obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+}
+
+func Test_encode_nil_array(t *testing.T) {
+	should := require.New(t)
+	type Ttest []string
+	var obj1 Ttest
+	output, err := json.Marshal(obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = json.Marshal(&obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = Marshal(obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = Marshal(&obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+}

jsoniter_object_test.go

@@ -1,18 +1,18 @@
 package jsoniter
 
 import (
-	"encoding/json"
-	"testing"
-	"github.com/json-iterator/go/require"
 	"bytes"
+	"encoding/json"
+	"github.com/json-iterator/go/require"
+	"testing"
 )
 
 func Test_empty_object(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`{}`)
+	iter := ParseString(ConfigOfDefault, `{}`)
 	field := iter.ReadObject()
 	should.Equal("", field)
-	iter = ParseString(`{}`)
+	iter = ParseString(ConfigOfDefault, `{}`)
 	iter.ReadObjectCB(func(iter *Iterator, field string) bool {
 		should.FailNow("should not call")
 		return true
@@ -21,14 +21,14 @@ func Test_empty_object(t *testing.T) {
 
 func Test_one_field(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`{"a": "b"}`)
+	iter := ParseString(ConfigOfDefault, `{"a": "b"}`)
 	field := iter.ReadObject()
 	should.Equal("a", field)
 	value := iter.ReadString()
 	should.Equal("b", value)
 	field = iter.ReadObject()
 	should.Equal("", field)
-	iter = ParseString(`{"a": "b"}`)
+	iter = ParseString(ConfigOfDefault, `{"a": "b"}`)
 	should.True(iter.ReadObjectCB(func(iter *Iterator, field string) bool {
 		should.Equal("a", field)
 		return true
@@ -37,7 +37,7 @@ func Test_one_field(t *testing.T) {
 
 func Test_two_field(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`{ "a": "b" , "c": "d" }`)
+	iter := ParseString(ConfigOfDefault, `{ "a": "b" , "c": "d" }`)
 	field := iter.ReadObject()
 	should.Equal("a", field)
 	value := iter.ReadString()
@@ -48,7 +48,7 @@ func Test_two_field(t *testing.T) {
 	should.Equal("d", value)
 	field = iter.ReadObject()
 	should.Equal("", field)
-	iter = ParseString(`{"field1": "1", "field2": 2}`)
+	iter = ParseString(ConfigOfDefault, `{"field1": "1", "field2": 2}`)
 	for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
 		switch field {
 		case "field1":
@@ -100,12 +100,15 @@ func Test_object_any_lazy_iterator(t *testing.T) {
 	should.False(hasNext)
 	vals[k] = v.ToString()
 
-	should.Equal(map[string]string{"a":"b", "c":"d"}, vals)
+	should.Equal(map[string]string{"a": "b", "c": "d"}, vals)
 	vals = map[string]string{}
-	for next, hasNext := any.IterateObject(); hasNext; k, v, hasNext = next() {
-		vals[k] = v.ToString()
+	for next, hasNext := any.IterateObject(); hasNext; {
+		k, v, hasNext = next()
+		if v.ValueType() == String {
+			vals[k] = v.ToString()
+		}
 	}
-	should.Equal(map[string]string{"a":"b", "c":"d"}, vals)
+	should.Equal(map[string]string{"a": "b", "c": "d"}, vals)
 }
 
 func Test_object_any_with_two_lazy_iterators(t *testing.T) {
@@ -150,7 +153,7 @@ func Test_object_lazy_any_get_all(t *testing.T) {
 	should := require.New(t)
 	any, err := UnmarshalAnyFromString(`{"a":[0],"b":[1]}`)
 	should.Nil(err)
-	should.Equal(`{"a":0,"b":1}`, any.Get('*', 0).ToString())
+	should.Contains(any.Get('*', 0).ToString(), `"a":0`)
 }
 
 func Test_object_lazy_any_get_invalid(t *testing.T) {
@@ -191,7 +194,7 @@ func Test_wrap_object(t *testing.T) {
 			vals[k] = v.ToString()
 		}
 	}
-	should.Equal(map[string]string{"Field1":"hello"}, vals)
+	should.Equal(map[string]string{"Field1": "hello"}, vals)
 }
 
 func Test_object_wrapper_any_get_all(t *testing.T) {
@@ -201,14 +204,13 @@ func Test_object_wrapper_any_get_all(t *testing.T) {
 		Field2 []int
 	}
 	any := Wrap(TestObject{[]int{1, 2}, []int{3, 4}})
-	should.Equal(`{"Field2":3,"Field1":1}`, any.Get('*', 0).ToString())
+	should.Contains(any.Get('*', 0).ToString(), `"Field2":3`)
 }
 
 func Test_write_object(t *testing.T) {
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 4096)
-	stream.IndentionStep = 2
+	stream := NewStream(Config{IndentionStep: 2}.Froze(), buf, 4096)
 	stream.WriteObjectStart()
 	stream.WriteObjectField("hello")
 	stream.WriteInt(1)
@@ -227,7 +229,7 @@ func Benchmark_jsoniter_object(b *testing.B) {
 		Field2 uint64
 	}
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(`{"field1": "1", "field2": 2}`)
+		iter := ParseString(ConfigOfDefault, `{"field1": "1", "field2": 2}`)
 		obj := TestObj{}
 		for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
 			switch field {

jsoniter_optional_test.go

@@ -1,8 +1,8 @@
 package jsoniter
 
 import (
-	"testing"
 	"github.com/json-iterator/go/require"
+	"testing"
 )
 
 func Test_encode_optional_int_pointer(t *testing.T) {
@@ -21,25 +21,26 @@ func Test_encode_optional_int_pointer(t *testing.T) {
 func Test_decode_struct_with_optional_field(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
-		field1 *string
-		field2 *string
+		Field1 *string
+		Field2 *string
 	}
 	obj := TestObject{}
 	UnmarshalFromString(`{"field1": null, "field2": "world"}`, &obj)
-	should.Nil(obj.field1)
-	should.Equal("world", *obj.field2)
+	should.Nil(obj.Field1)
+	should.Equal("world", *obj.Field2)
 }
 
 func Test_encode_struct_with_optional_field(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
-		field1 *string
-		field2 *string
+		Field1 *string
+		Field2 *string
 	}
 	obj := TestObject{}
 	world := "world"
-	obj.field2 = &world
+	obj.Field2 = &world
 	str, err := MarshalToString(obj)
 	should.Nil(err)
-	should.Equal(`{"field1":null,"field2":"world"}`, str)
-}
+	should.Contains(str, `"Field1":null`)
+	should.Contains(str, `"Field2":"world"`)
+}

jsoniter_reflect_native_test.go

@@ -1,12 +1,12 @@
 package jsoniter
 
 import (
-	"testing"
 	"fmt"
+	"testing"
 )
 
 func Test_reflect_str(t *testing.T) {
-	iter := ParseString(`"hello"`)
+	iter := ParseString(ConfigOfDefault, `"hello"`)
 	str := ""
 	iter.ReadVal(&str)
 	if str != "hello" {
@@ -16,7 +16,7 @@ func Test_reflect_str(t *testing.T) {
 }
 
 func Test_reflect_ptr_str(t *testing.T) {
-	iter := ParseString(`"hello"`)
+	iter := ParseString(ConfigOfDefault, `"hello"`)
 	var str *string
 	iter.ReadVal(&str)
 	if *str != "hello" {
@@ -25,7 +25,7 @@ func Test_reflect_ptr_str(t *testing.T) {
 }
 
 func Test_reflect_int(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := int(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -34,7 +34,7 @@ func Test_reflect_int(t *testing.T) {
 }
 
 func Test_reflect_int8(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := int8(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -43,7 +43,7 @@ func Test_reflect_int8(t *testing.T) {
 }
 
 func Test_reflect_int16(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := int16(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -52,7 +52,7 @@ func Test_reflect_int16(t *testing.T) {
 }
 
 func Test_reflect_int32(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := int32(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -61,7 +61,7 @@ func Test_reflect_int32(t *testing.T) {
 }
 
 func Test_reflect_int64(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := int64(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -70,7 +70,7 @@ func Test_reflect_int64(t *testing.T) {
 }
 
 func Test_reflect_uint(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := uint(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -79,7 +79,7 @@ func Test_reflect_uint(t *testing.T) {
 }
 
 func Test_reflect_uint8(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := uint8(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -88,7 +88,7 @@ func Test_reflect_uint8(t *testing.T) {
 }
 
 func Test_reflect_uint16(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := uint16(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -97,7 +97,7 @@ func Test_reflect_uint16(t *testing.T) {
 }
 
 func Test_reflect_uint32(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := uint32(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -106,7 +106,7 @@ func Test_reflect_uint32(t *testing.T) {
 }
 
 func Test_reflect_uint64(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := uint64(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -115,7 +115,7 @@ func Test_reflect_uint64(t *testing.T) {
 }
 
 func Test_reflect_byte(t *testing.T) {
-	iter := ParseString(`123`)
+	iter := ParseString(ConfigOfDefault, `123`)
 	val := byte(0)
 	iter.ReadVal(&val)
 	if val != 123 {
@@ -124,7 +124,7 @@ func Test_reflect_byte(t *testing.T) {
 }
 
 func Test_reflect_float32(t *testing.T) {
-	iter := ParseString(`1.23`)
+	iter := ParseString(ConfigOfDefault, `1.23`)
 	val := float32(0)
 	iter.ReadVal(&val)
 	if val != 1.23 {
@@ -134,7 +134,7 @@ func Test_reflect_float32(t *testing.T) {
 }
 
 func Test_reflect_float64(t *testing.T) {
-	iter := ParseString(`1.23`)
+	iter := ParseString(ConfigOfDefault, `1.23`)
 	val := float64(0)
 	iter.ReadVal(&val)
 	if val != 1.23 {
@@ -144,11 +144,11 @@ func Test_reflect_float64(t *testing.T) {
 }
 
 func Test_reflect_bool(t *testing.T) {
-	iter := ParseString(`true`)
+	iter := ParseString(ConfigOfDefault, `true`)
 	val := false
 	iter.ReadVal(&val)
 	if val != true {
 		fmt.Println(iter.Error)
 		t.Fatal(val)
 	}
-}
+}

jsoniter_reflect_struct_test.go

@@ -1,113 +1,114 @@
 package jsoniter
 
 import (
-	"testing"
+	"bytes"
 	"github.com/json-iterator/go/require"
+	"testing"
 )
 
 func Test_decode_one_field_struct(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
-		field1 string
+		Field1 string
 	}
 	obj := TestObject{}
 	should.Nil(UnmarshalFromString(`{}`, &obj))
-	should.Equal("", obj.field1)
+	should.Equal("", obj.Field1)
 	should.Nil(UnmarshalFromString(`{"field1": "hello"}`, &obj))
-	should.Equal("hello", obj.field1)
+	should.Equal("hello", obj.Field1)
 }
 
 func Test_decode_two_fields_struct(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
-		field1 string
-		field2 string
+		Field1 string
+		Field2 string
 	}
 	obj := TestObject{}
 	should.Nil(UnmarshalFromString(`{}`, &obj))
-	should.Equal("", obj.field1)
-	should.Nil(UnmarshalFromString(`{"field1": "a", "field2": "b"}`, &obj))
-	should.Equal("a", obj.field1)
-	should.Equal("b", obj.field2)
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
 }
 
 func Test_decode_three_fields_struct(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
-		field1 string
-		field2 string
-		field3 string
+		Field1 string
+		Field2 string
+		Field3 string
 	}
 	obj := TestObject{}
 	should.Nil(UnmarshalFromString(`{}`, &obj))
-	should.Equal("", obj.field1)
-	should.Nil(UnmarshalFromString(`{"field1": "a", "field2": "b", "field3": "c"}`, &obj))
-	should.Equal("a", obj.field1)
-	should.Equal("b", obj.field2)
-	should.Equal("c", obj.field3)
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
 }
 
 func Test_decode_four_fields_struct(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
-		field1 string
-		field2 string
-		field3 string
-		field4 string
+		Field1 string
+		Field2 string
+		Field3 string
+		Field4 string
 	}
 	obj := TestObject{}
 	should.Nil(UnmarshalFromString(`{}`, &obj))
-	should.Equal("", obj.field1)
-	should.Nil(UnmarshalFromString(`{"field1": "a", "field2": "b", "field3": "c", "field4": "d"}`, &obj))
-	should.Equal("a", obj.field1)
-	should.Equal("b", obj.field2)
-	should.Equal("c", obj.field3)
-	should.Equal("d", obj.field4)
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
 }
 
 func Test_decode_five_fields_struct(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
-		field1 string
-		field2 string
-		field3 string
-		field4 string
-		field5 string
+		Field1 string
+		Field2 string
+		Field3 string
+		Field4 string
+		Field5 string
 	}
 	obj := TestObject{}
 	should.Nil(UnmarshalFromString(`{}`, &obj))
-	should.Equal("", obj.field1)
-	should.Nil(UnmarshalFromString(`{"field1": "a", "field2": "b", "field3": "c", "field4": "d", "field5": "e"}`, &obj))
-	should.Equal("a", obj.field1)
-	should.Equal("b", obj.field2)
-	should.Equal("c", obj.field3)
-	should.Equal("d", obj.field4)
-	should.Equal("e", obj.field5)
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
+	should.Equal("e", obj.Field5)
 }
 
 func Test_decode_ten_fields_struct(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
-		field1 string
-		field2 string
-		field3 string
-		field4 string
-		field5 string
-		field6 string
-		field7 string
-		field8 string
-		field9 string
-		field10 string
+		Field1  string
+		Field2  string
+		Field3  string
+		Field4  string
+		Field5  string
+		Field6  string
+		Field7  string
+		Field8  string
+		Field9  string
+		Field10 string
 	}
 	obj := TestObject{}
 	should.Nil(UnmarshalFromString(`{}`, &obj))
-	should.Equal("", obj.field1)
-	should.Nil(UnmarshalFromString(`{"field1": "a", "field2": "b", "field3": "c", "field4": "d", "field5": "e"}`, &obj))
-	should.Equal("a", obj.field1)
-	should.Equal("b", obj.field2)
-	should.Equal("c", obj.field3)
-	should.Equal("d", obj.field4)
-	should.Equal("e", obj.field5)
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
+	should.Equal("e", obj.Field5)
 }
 
 func Test_decode_struct_field_with_tag(t *testing.T) {
@@ -144,3 +145,97 @@ func Test_write_val_one_field_struct(t *testing.T) {
 	should.Nil(err)
 	should.Equal(`{"field-1":"hello"}`, str)
 }
+
+func Test_mixed(t *testing.T) {
+	should := require.New(t)
+	type AA struct {
+		ID      int                    `json:"id"`
+		Payload map[string]interface{} `json:"payload"`
+		buf     *bytes.Buffer          `json:"-"`
+	}
+	aa := AA{}
+	err := UnmarshalFromString(` {"id":1, "payload":{"account":"123","password":"456"}}`, &aa)
+	should.Nil(err)
+	should.Equal(1, aa.ID)
+	should.Equal("123", aa.Payload["account"])
+}
+
+func Test_omit_empty(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string `json:"field-1,omitempty"`
+		Field2 string `json:"field-2,omitempty"`
+		Field3 string `json:"field-3,omitempty"`
+	}
+	obj := TestObject{}
+	obj.Field2 = "hello"
+	str, err := MarshalToString(&obj)
+	should.Nil(err)
+	should.Equal(`{"field-2":"hello"}`, str)
+}
+
+func Test_any_within_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 Any
+		Field2 Any
+	}
+	obj := TestObject{}
+	err := UnmarshalFromString(`{"Field1": "hello", "Field2": [1,2,3]}`, &obj)
+	should.Nil(err)
+	should.Equal("hello", obj.Field1.ToString())
+	should.Equal("[1,2,3]", obj.Field2.ToString())
+}
+
+func Test_recursive_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		Me     *TestObject
+	}
+	obj := TestObject{}
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Contains(str, `"Field1":""`)
+	should.Contains(str, `"Me":null`)
+	err = UnmarshalFromString(str, &obj)
+	should.Nil(err)
+}
+
+func Test_one_field_struct(t *testing.T) {
+	should := require.New(t)
+	type YetYetAnotherObject struct {
+		Field string
+	}
+	type YetAnotherObject struct {
+		Field *YetYetAnotherObject
+	}
+	type AnotherObject struct {
+		Field *YetAnotherObject
+	}
+	type TestObject struct {
+		Me *AnotherObject
+	}
+	obj := TestObject{&AnotherObject{&YetAnotherObject{&YetYetAnotherObject{"abc"}}}}
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"Me":{"Field":{"Field":{"Field":"abc"}}}}`, str)
+	str, err = MarshalToString(&obj)
+	should.Nil(err)
+	should.Equal(`{"Me":{"Field":{"Field":{"Field":"abc"}}}}`, str)
+}
+
+func Test_anonymous_struct_marshal(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field string
+	}
+	str, err := MarshalToString(struct {
+		TestObject
+		Field int
+	}{
+		Field: 100,
+	})
+	should.Nil(err)
+	should.Equal(`{"Field":100}`, str)
+}

jsoniter_reflect_test.go

@@ -3,9 +3,9 @@ package jsoniter
 import (
 	"encoding/json"
 	"fmt"
+	"github.com/json-iterator/go/require"
 	"testing"
 	"unsafe"
-	"github.com/json-iterator/go/require"
 )
 
 func Test_decode_slice(t *testing.T) {
@@ -24,17 +24,17 @@ func Test_decode_large_slice(t *testing.T) {
 
 func Test_decode_nested(t *testing.T) {
 	type StructOfString struct {
-		field1 string
-		field2 string
+		Field1 string
+		Field2 string
 	}
-	iter := ParseString(`[{"field1": "hello"}, null, {"field2": "world"}]`)
+	iter := ParseString(ConfigOfDefault, `[{"field1": "hello"}, null, {"field2": "world"}]`)
 	slice := []*StructOfString{}
 	iter.ReadVal(&slice)
 	if len(slice) != 3 {
 		fmt.Println(iter.Error)
 		t.Fatal(len(slice))
 	}
-	if slice[0].field1 != "hello" {
+	if slice[0].Field1 != "hello" {
 		fmt.Println(iter.Error)
 		t.Fatal(slice[0])
 	}
@@ -42,19 +42,19 @@ func Test_decode_nested(t *testing.T) {
 		fmt.Println(iter.Error)
 		t.Fatal(slice[1])
 	}
-	if slice[2].field2 != "world" {
+	if slice[2].Field2 != "world" {
 		fmt.Println(iter.Error)
 		t.Fatal(slice[2])
 	}
 }
 
 func Test_decode_base64(t *testing.T) {
-	iter := ParseString(`"YWJj"`)
+	iter := ParseString(ConfigOfDefault, `"YWJj"`)
 	val := []byte{}
 	RegisterTypeDecoder("[]uint8", func(ptr unsafe.Pointer, iter *Iterator) {
 		*((*[]byte)(ptr)) = iter.ReadBase64()
 	})
-	defer CleanDecoders()
+	defer ConfigOfDefault.CleanDecoders()
 	iter.ReadVal(&val)
 	if "abc" != string(val) {
 		t.Fatal(string(val))
@@ -70,7 +70,7 @@ type StructOfTagOne struct {
 
 func Benchmark_jsoniter_reflect(b *testing.B) {
 	b.ReportAllocs()
-	iter := NewIterator()
+	iter := NewIterator(ConfigOfDefault)
 	Struct := &StructOfTagOne{}
 	//var Struct *StructOfTagOne
 	input := []byte(`{"field3": "100", "field4": "100"}`)
@@ -96,7 +96,7 @@ func Benchmark_jsoniter_direct(b *testing.B) {
 		//		iter.Skip()
 		//	}
 		//}
-		iter := ParseString(`["hello", "world"]`)
+		iter := ParseString(ConfigOfDefault, `["hello", "world"]`)
 		array := make([]string, 0, 2)
 		for iter.ReadArray() {
 			array = append(array, iter.ReadString())

jsoniter_skip_test.go

@@ -6,7 +6,7 @@ import (
 )
 
 func Test_skip_number(t *testing.T) {
-	iter := ParseString(`[-0.12, "b"]`)
+	iter := ParseString(ConfigOfDefault, `[-0.12, "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -16,7 +16,7 @@ func Test_skip_number(t *testing.T) {
 }
 
 func Test_skip_null(t *testing.T) {
-	iter := ParseString(`[null , "b"]`)
+	iter := ParseString(ConfigOfDefault, `[null , "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -26,7 +26,7 @@ func Test_skip_null(t *testing.T) {
 }
 
 func Test_skip_true(t *testing.T) {
-	iter := ParseString(`[true , "b"]`)
+	iter := ParseString(ConfigOfDefault, `[true , "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -36,7 +36,7 @@ func Test_skip_true(t *testing.T) {
 }
 
 func Test_skip_false(t *testing.T) {
-	iter := ParseString(`[false , "b"]`)
+	iter := ParseString(ConfigOfDefault, `[false , "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -46,7 +46,7 @@ func Test_skip_false(t *testing.T) {
 }
 
 func Test_skip_array(t *testing.T) {
-	iter := ParseString(`[[1, [2, [3], 4]], "b"]`)
+	iter := ParseString(ConfigOfDefault, `[[1, [2, [3], 4]], "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -56,7 +56,7 @@ func Test_skip_array(t *testing.T) {
 }
 
 func Test_skip_empty_array(t *testing.T) {
-	iter := ParseString(`[ [ ], "b"]`)
+	iter := ParseString(ConfigOfDefault, `[ [ ], "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -66,7 +66,7 @@ func Test_skip_empty_array(t *testing.T) {
 }
 
 func Test_skip_nested(t *testing.T) {
-	iter := ParseString(`[ {"a" : [{"b": "c"}], "d": 102 }, "b"]`)
+	iter := ParseString(ConfigOfDefault, `[ {"a" : [{"b": "c"}], "d": 102 }, "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -106,7 +106,7 @@ func Benchmark_jsoniter_skip(b *testing.B) {
 }`)
 	for n := 0; n < b.N; n++ {
 		result := TestResp{}
-		iter := ParseBytes(input)
+		iter := ParseBytes(ConfigOfDefault, input)
 		for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
 			switch field {
 			case "code":

jsoniter_stream_test.go

@@ -0,0 +1,53 @@
+package jsoniter
+
+import (
+	"github.com/json-iterator/go/require"
+	"testing"
+)
+
+func Test_writeByte_should_grow_buffer(t *testing.T) {
+	should := require.New(t)
+	stream := NewStream(ConfigOfDefault, nil, 1)
+	stream.writeByte('1')
+	should.Equal("1", string(stream.Buffer()))
+	should.Equal(1, len(stream.buf))
+	stream.writeByte('2')
+	should.Equal("12", string(stream.Buffer()))
+	should.Equal(2, len(stream.buf))
+	stream.writeThreeBytes('3', '4', '5')
+	should.Equal("12345", string(stream.Buffer()))
+}
+
+func Test_writeBytes_should_grow_buffer(t *testing.T) {
+	should := require.New(t)
+	stream := NewStream(ConfigOfDefault, nil, 1)
+	stream.Write([]byte{'1', '2'})
+	should.Equal("12", string(stream.Buffer()))
+	should.Equal(3, len(stream.buf))
+	stream.Write([]byte{'3', '4', '5', '6', '7'})
+	should.Equal("1234567", string(stream.Buffer()))
+	should.Equal(8, len(stream.buf))
+}
+
+func Test_writeIndention_should_grow_buffer(t *testing.T) {
+	should := require.New(t)
+	stream := NewStream(Config{IndentionStep: 2}.Froze(), nil, 1)
+	stream.WriteVal([]int{1, 2, 3})
+	should.Equal("[\n  1,\n  2,\n  3\n]", string(stream.Buffer()))
+}
+
+func Test_writeRaw_should_grow_buffer(t *testing.T) {
+	should := require.New(t)
+	stream := NewStream(ConfigOfDefault, nil, 1)
+	stream.WriteRaw("123")
+	should.Nil(stream.Error)
+	should.Equal("123", string(stream.Buffer()))
+}
+
+func Test_writeString_should_grow_buffer(t *testing.T) {
+	should := require.New(t)
+	stream := NewStream(ConfigOfDefault, nil, 0)
+	stream.WriteString("123")
+	should.Nil(stream.Error)
+	should.Equal(`"123"`, string(stream.Buffer()))
+}

jsoniter_string_test.go

@@ -3,36 +3,37 @@ package jsoniter
 import (
 	"bytes"
 	"encoding/json"
-	"testing"
-	"github.com/json-iterator/go/require"
 	"fmt"
+	"github.com/json-iterator/go/require"
+	"testing"
+	"unicode/utf8"
 )
 
 func Test_read_normal_string(t *testing.T) {
 	cases := map[string]string{
 		`"0123456789012345678901234567890123456789"`: `0123456789012345678901234567890123456789`,
-		`""`: ``,
+		`""`:      ``,
 		`"hello"`: `hello`,
 	}
 	for input, output := range cases {
 		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(input)
+			iter := ParseString(ConfigOfDefault, input)
 			should.Equal(output, iter.ReadString())
 		})
 		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
 			should := require.New(t)
-			iter := Parse(bytes.NewBufferString(input), 2)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
 			should.Equal(output, iter.ReadString())
 		})
 		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(input)
+			iter := ParseString(ConfigOfDefault, input)
 			should.Equal(output, string(iter.ReadStringAsSlice()))
 		})
 		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
 			should := require.New(t)
-			iter := Parse(bytes.NewBufferString(input), 2)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
 			should.Equal(output, string(iter.ReadStringAsSlice()))
 		})
 	}
@@ -40,20 +41,20 @@ func Test_read_normal_string(t *testing.T) {
 
 func Test_read_exotic_string(t *testing.T) {
 	cases := map[string]string{
-		`"hel\"lo"`: `hel"lo`,
-		`"hel\nlo"`: "hel\nlo",
+		`"hel\"lo"`:      `hel"lo`,
+		`"hel\nlo"`:      "hel\nlo",
 		`"\u4e2d\u6587"`: "中文",
 		`"\ud83d\udc4a"`: "\xf0\x9f\x91\x8a", // surrogate
 	}
 	for input, output := range cases {
 		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(input)
+			iter := ParseString(ConfigOfDefault, input)
 			should.Equal(output, iter.ReadString())
 		})
 		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
 			should := require.New(t)
-			iter := Parse(bytes.NewBufferString(input), 2)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
 			should.Equal(output, iter.ReadString())
 		})
 	}
@@ -61,7 +62,7 @@ func Test_read_exotic_string(t *testing.T) {
 
 func Test_read_string_as_interface(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(`"hello"`)
+	iter := ParseString(ConfigOfDefault, `"hello"`)
 	should.Equal("hello", iter.Read())
 }
 
@@ -98,22 +99,71 @@ func Test_write_string(t *testing.T) {
 func Test_write_val_string(t *testing.T) {
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	stream.WriteVal("hello")
 	stream.Flush()
 	should.Nil(stream.Error)
 	should.Equal(`"hello"`, buf.String())
 }
 
+func Test_decode_slash(t *testing.T) {
+	should := require.New(t)
+	var obj interface{}
+	should.NotNil(json.Unmarshal([]byte("\\"), &obj))
+	should.NotNil(UnmarshalFromString("\\", &obj))
+}
+
+func Test_html_escape(t *testing.T) {
+	should := require.New(t)
+	output, err := json.Marshal(`>`)
+	should.Nil(err)
+	should.Equal(`"\u003e"`, string(output))
+	output, err = ConfigCompatibleWithStandardLibrary.Marshal(`>`)
+	should.Nil(err)
+	should.Equal(`"\u003e"`, string(output))
+}
+
+func Test_string_encode_with_std(t *testing.T) {
+	should := require.New(t)
+	for i := 0; i < utf8.RuneSelf; i++ {
+		input := string([]byte{byte(i)})
+		stdOutputBytes, err := json.Marshal(input)
+		should.Nil(err)
+		stdOutput := string(stdOutputBytes)
+		jsoniterOutputBytes, err := ConfigCompatibleWithStandardLibrary.Marshal(input)
+		should.Nil(err)
+		jsoniterOutput := string(jsoniterOutputBytes)
+		should.Equal(stdOutput, jsoniterOutput)
+	}
+}
+
+func Test_string_encode_with_std_without_html_escape(t *testing.T) {
+	should := require.New(t)
+	for i := 0; i < utf8.RuneSelf; i++ {
+		input := string([]byte{byte(i)})
+		buf := &bytes.Buffer{}
+		encoder := json.NewEncoder(buf)
+		encoder.SetEscapeHTML(false)
+		err := encoder.Encode(input)
+		should.Nil(err)
+		stdOutput := buf.String()
+		stdOutput = stdOutput[:len(stdOutput) - 1]
+		jsoniterOutputBytes, err := Marshal(input)
+		should.Nil(err)
+		jsoniterOutput := string(jsoniterOutputBytes)
+		should.Equal(stdOutput, jsoniterOutput)
+	}
+}
+
 func Benchmark_jsoniter_unicode(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(`"\ud83d\udc4a"`)
+		iter := ParseString(ConfigOfDefault, `"\ud83d\udc4a"`)
 		iter.ReadString()
 	}
 }
 
 func Benchmark_jsoniter_ascii(b *testing.B) {
-	iter := NewIterator()
+	iter := NewIterator(ConfigOfDefault)
 	input := []byte(`"hello, world! hello, world!"`)
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
@@ -123,7 +173,7 @@ func Benchmark_jsoniter_ascii(b *testing.B) {
 }
 
 func Benchmark_jsoniter_string_as_bytes(b *testing.B) {
-	iter := ParseString(`"hello, world!"`)
+	iter := ParseString(ConfigOfDefault, `"hello, world!"`)
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
 		iter.ResetBytes(iter.buf)

output_tests/builtins/bool/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/bool/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T bool

output_tests/builtins/bool_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/bool_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T bool

output_tests/builtins/byte/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/byte/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T byte

output_tests/builtins/byte_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/byte_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T byte

output_tests/builtins/float32/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/float32/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T float32

output_tests/builtins/float32_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/float32_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T float32

output_tests/builtins/float64/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/float64/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T float64

output_tests/builtins/float64_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/float64_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T float64

output_tests/builtins/int16/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int16/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int16

output_tests/builtins/int16_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int16_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int16

output_tests/builtins/int32/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int32/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int32

output_tests/builtins/int32_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int32_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int32

output_tests/builtins/int8/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int8/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int8

output_tests/builtins/int8_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int8_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int8

output_tests/builtins/string/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/string/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T string

output_tests/builtins/string_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/string_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T string

output_tests/builtins/uint16/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/uint16/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T uint16

output_tests/builtins/uint16_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/uint16_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T uint16

output_tests/builtins/uint32/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/uint32/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T uint32

output_tests/builtins/uint32_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/uint32_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T uint32

output_tests/builtins/uint8/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/uint8/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T uint8

output_tests/builtins/uint8_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/uint8_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T uint8

output_tests/maps/builtins/int32/bool/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/maps/builtins/int32/bool/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T map[int32]bool