#185 add jsoniter.Valid

Used writeTwoBytes in Stream.WriteEmptyArray

README.md

@@ -44,7 +44,9 @@ with
 
 ```go
 import "github.com/json-iterator/go"
-jsoniter.Marshal(&data)
+
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+json.Marshal(&data)
 ```
 
 Replace
@@ -58,7 +60,9 @@ with
 
 ```go
 import "github.com/json-iterator/go"
-jsoniter.Unmarshal(input, &data)
+
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+json.Unmarshal(input, &data)
 ```
 
 [More documentation](http://jsoniter.com/migrate-from-go-std.html)
@@ -76,5 +80,7 @@ Contributors
 * [thockin](https://github.com/thockin) 
 * [mattn](https://github.com/mattn)
 * [cch123](https://github.com/cch123)
+* [Oleg Shaldybin](https://github.com/olegshaldybin)
+* [Jason Toffaletti](https://github.com/toffaletti)
 
 Report issue or pull request, or email taowen@gmail.com, or [![Gitter chat](https://badges.gitter.im/gitterHQ/gitter.png)](https://gitter.im/json-iterator/Lobby)

feature_adapter.go

@@ -125,3 +125,8 @@ func (adapter *Encoder) SetEscapeHTML(escapeHTML bool) {
 	config.EscapeHTML = escapeHTML
 	adapter.stream.cfg = config.Froze().(*frozenConfig)
 }
+
+// Valid reports whether data is a valid JSON encoding.
+func Valid(data []byte) bool {
+	return ConfigDefault.Valid(data)
+}

feature_config.go

@@ -45,6 +45,7 @@ type API interface {
 	Get(data []byte, path ...interface{}) Any
 	NewEncoder(writer io.Writer) *Encoder
 	NewDecoder(reader io.Reader) *Decoder
+	Valid(data []byte) bool
 }
 
 // ConfigDefault the default API
@@ -333,3 +334,10 @@ func (cfg *frozenConfig) NewDecoder(reader io.Reader) *Decoder {
 	iter := Parse(cfg, reader, 512)
 	return &Decoder{iter}
 }
+
+func (cfg *frozenConfig) Valid(data []byte) bool {
+	iter := cfg.BorrowIterator(data)
+	defer cfg.ReturnIterator(iter)
+	iter.Skip()
+	return iter.Error == nil
+}

feature_iter.go

@@ -200,8 +200,22 @@ func (iter *Iterator) ReportError(operation string, msg string) {
 	if peekStart < 0 {
 		peekStart = 0
 	}
-	iter.Error = fmt.Errorf("%s: %s, parsing %v ...%s... at %s", operation, msg, iter.head,
-		string(iter.buf[peekStart:iter.head]), string(iter.buf[0:iter.tail]))
+	peekEnd := iter.head + 10
+	if peekEnd > iter.tail {
+		peekEnd = iter.tail
+	}
+	parsing := string(iter.buf[peekStart:peekEnd])
+	contextStart := iter.head - 50
+	if contextStart < 0 {
+		contextStart = 0
+	}
+	contextEnd := iter.head + 50
+	if contextEnd > iter.tail {
+		contextEnd = iter.tail
+	}
+	context := string(iter.buf[contextStart:contextEnd])
+	iter.Error = fmt.Errorf("%s: %s, error found in #%v byte of ...|%s|..., bigger context ...|%s|...",
+		operation, msg, iter.head-peekStart, parsing, context)
 }
 
 // CurrentBuffer gets current buffer as string for debugging purpose
@@ -210,7 +224,7 @@ func (iter *Iterator) CurrentBuffer() string {
 	if peekStart < 0 {
 		peekStart = 0
 	}
-	return fmt.Sprintf("parsing %v ...|%s|... at %s", iter.head,
+	return fmt.Sprintf("parsing #%v byte, around ...|%s|..., whole buffer ...|%s|...", iter.head,
 		string(iter.buf[peekStart:iter.head]), string(iter.buf[0:iter.tail]))
 }
 

feature_iter_array.go

@@ -19,7 +19,7 @@ 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
 	}
 }
@@ -42,7 +42,7 @@ func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
 				c = iter.nextToken()
 			}
 			if c != ']' {
-				iter.ReportError("ReadArrayCB", "expect ] in the end")
+				iter.ReportError("ReadArrayCB", "expect ] in the end, but found "+string([]byte{c}))
 				return false
 			}
 			return true
@@ -53,6 +53,6 @@ func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
 		iter.skipThreeBytes('u', 'l', 'l')
 		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_object.go

@@ -24,7 +24,7 @@ func (iter *Iterator) ReadObject() (ret string) {
 		if c == '}' {
 			return "" // end of object
 		}
-		iter.ReportError("ReadObject", `expect " after {`)
+		iter.ReportError("ReadObject", `expect " after {, but found `+string([]byte{c}))
 		return
 	case ',':
 		return string(iter.readObjectFieldAsBytes())
@@ -105,14 +105,14 @@ func (iter *Iterator) ReadObjectCB(callback func(*Iterator, string) bool) bool {
 		if c == '}' {
 			return true
 		}
-		iter.ReportError("ReadObjectCB", `expect " after }`)
+		iter.ReportError("ReadObjectCB", `expect " after }, but found `+string([]byte{c}))
 		return false
 	}
 	if c == 'n' {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadObjectCB", `expect { or n`)
+	iter.ReportError("ReadObjectCB", `expect { or n, but found `+string([]byte{c}))
 	return false
 }
 
@@ -125,7 +125,7 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 			iter.unreadByte()
 			field := iter.ReadString()
 			if iter.nextToken() != ':' {
-				iter.ReportError("ReadMapCB", "expect : after object field")
+				iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
 				return false
 			}
 			if !callback(iter, field) {
@@ -135,7 +135,7 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 			for c == ',' {
 				field = iter.ReadString()
 				if iter.nextToken() != ':' {
-					iter.ReportError("ReadMapCB", "expect : after object field")
+					iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
 					return false
 				}
 				if !callback(iter, field) {
@@ -152,14 +152,14 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 		if c == '}' {
 			return true
 		}
-		iter.ReportError("ReadMapCB", `expect " after }`)
+		iter.ReportError("ReadMapCB", `expect " after }, but found `+string([]byte{c}))
 		return false
 	}
 	if c == 'n' {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadMapCB", `expect { or n`)
+	iter.ReportError("ReadMapCB", `expect { or n, but found `+string([]byte{c}))
 	return false
 }
 
@@ -176,7 +176,7 @@ func (iter *Iterator) readObjectStart() bool {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return false
 	}
-	iter.ReportError("readObjectStart", "expect { or n")
+	iter.ReportError("readObjectStart", "expect { or n, but found "+string([]byte{c}))
 	return false
 }
 
@@ -192,7 +192,7 @@ func (iter *Iterator) readObjectFieldAsBytes() (ret []byte) {
 		}
 	}
 	if iter.buf[iter.head] != ':' {
-		iter.ReportError("readObjectFieldAsBytes", "expect : after object field")
+		iter.ReportError("readObjectFieldAsBytes", "expect : after object field, but found "+string([]byte{iter.buf[iter.head]}))
 		return
 	}
 	iter.head++

feature_iter_skip.go

@@ -25,7 +25,7 @@ func (iter *Iterator) ReadBool() (ret bool) {
 		iter.skipFourBytes('a', 'l', 's', 'e')
 		return false
 	}
-	iter.ReportError("ReadBool", "expect t or f")
+	iter.ReportError("ReadBool", "expect t or f, but found "+string([]byte{c}))
 	return
 }
 
@@ -59,7 +59,9 @@ func (iter *Iterator) stopCapture() []byte {
 	iter.captureStartedAt = -1
 	iter.captured = nil
 	if len(captured) == 0 {
-		return remaining
+		copied := make([]byte, len(remaining))
+		copy(copied, remaining)
+		return copied
 	}
 	captured = append(captured, remaining...)
 	return captured

feature_iter_string.go

@@ -28,7 +28,7 @@ func (iter *Iterator) ReadString() (ret string) {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return ""
 	}
-	iter.ReportError("ReadString", `expects " or n`)
+	iter.ReportError("ReadString", `expects " or n, but found `+string([]byte{c}))
 	return
 }
 
@@ -139,7 +139,7 @@ func (iter *Iterator) ReadStringAsSlice() (ret []byte) {
 		}
 		return copied
 	}
-	iter.ReportError("ReadStringAsSlice", `expects " or n`)
+	iter.ReportError("ReadStringAsSlice", `expects " or n, but found `+string([]byte{c}))
 	return
 }
 
@@ -156,7 +156,7 @@ func (iter *Iterator) readU4() (ret rune) {
 		} else if c >= 'A' && c <= 'F' {
 			ret = ret*16 + rune(c-'A'+10)
 		} else {
-			iter.ReportError("readU4", "expects 0~9 or a~f")
+			iter.ReportError("readU4", "expects 0~9 or a~f, but found "+string([]byte{c}))
 			return
 		}
 	}

feature_json_number.go

@@ -1,9 +1,25 @@
 package jsoniter
 
-import "encoding/json"
+import (
+	"encoding/json"
+	"strconv"
+)
 
 type Number string
 
+// String returns the literal text of the number.
+func (n Number) String() string { return string(n) }
+
+// Float64 returns the number as a float64.
+func (n Number) Float64() (float64, error) {
+	return strconv.ParseFloat(string(n), 64)
+}
+
+// Int64 returns the number as an int64.
+func (n Number) Int64() (int64, error) {
+	return strconv.ParseInt(string(n), 10, 64)
+}
+
 func CastJsonNumber(val interface{}) (string, bool) {
 	switch typedVal := val.(type) {
 	case json.Number:

feature_reflect_extension.go

@@ -269,7 +269,7 @@ func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, err
 		if decoder == nil {
 			var err error
 			decoder, err = decoderOfType(cfg, field.Type)
-			if err != nil {
+			if len(fieldNames) > 0 && err != nil {
 				return nil, err
 			}
 		}
@@ -277,11 +277,11 @@ func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, err
 		if encoder == nil {
 			var err error
 			encoder, err = encoderOfType(cfg, field.Type)
-			if err != nil {
+			if len(fieldNames) > 0 && err != nil {
 				return nil, err
 			}
 			// map is stored as pointer in the struct
-			if field.Type.Kind() == reflect.Map {
+			if encoder != nil && field.Type.Kind() == reflect.Map {
 				encoder = &optionalEncoder{encoder}
 			}
 		}

feature_reflect_native.go

@@ -32,11 +32,9 @@ type intCodec struct {
 }
 
 func (codec *intCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*int)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*int)(ptr)) = iter.ReadInt()
 	}
-	*((*int)(ptr)) = iter.ReadInt()
 }
 
 func (codec *intCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -55,11 +53,9 @@ type uintptrCodec struct {
 }
 
 func (codec *uintptrCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uintptr)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*uintptr)(ptr)) = uintptr(iter.ReadUint64())
 	}
-	*((*uintptr)(ptr)) = uintptr(iter.ReadUint64())
 }
 
 func (codec *uintptrCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -78,11 +74,9 @@ type int8Codec struct {
 }
 
 func (codec *int8Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint8)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*int8)(ptr)) = iter.ReadInt8()
 	}
-	*((*int8)(ptr)) = iter.ReadInt8()
 }
 
 func (codec *int8Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -101,11 +95,9 @@ type int16Codec struct {
 }
 
 func (codec *int16Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*int16)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*int16)(ptr)) = iter.ReadInt16()
 	}
-	*((*int16)(ptr)) = iter.ReadInt16()
 }
 
 func (codec *int16Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -124,11 +116,9 @@ type int32Codec struct {
 }
 
 func (codec *int32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*int32)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*int32)(ptr)) = iter.ReadInt32()
 	}
-	*((*int32)(ptr)) = iter.ReadInt32()
 }
 
 func (codec *int32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -147,11 +137,9 @@ type int64Codec struct {
 }
 
 func (codec *int64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*int64)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*int64)(ptr)) = iter.ReadInt64()
 	}
-	*((*int64)(ptr)) = iter.ReadInt64()
 }
 
 func (codec *int64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -170,11 +158,10 @@ type uintCodec struct {
 }
 
 func (codec *uintCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint)(ptr)) = 0
+	if !iter.ReadNil() {
+		*((*uint)(ptr)) = iter.ReadUint()
 		return
 	}
-	*((*uint)(ptr)) = iter.ReadUint()
 }
 
 func (codec *uintCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -193,11 +180,9 @@ type uint8Codec struct {
 }
 
 func (codec *uint8Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint8)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*uint8)(ptr)) = iter.ReadUint8()
 	}
-	*((*uint8)(ptr)) = iter.ReadUint8()
 }
 
 func (codec *uint8Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -216,11 +201,9 @@ type uint16Codec struct {
 }
 
 func (codec *uint16Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint16)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*uint16)(ptr)) = iter.ReadUint16()
 	}
-	*((*uint16)(ptr)) = iter.ReadUint16()
 }
 
 func (codec *uint16Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -239,11 +222,9 @@ type uint32Codec struct {
 }
 
 func (codec *uint32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint32)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*uint32)(ptr)) = iter.ReadUint32()
 	}
-	*((*uint32)(ptr)) = iter.ReadUint32()
 }
 
 func (codec *uint32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -262,11 +243,9 @@ type uint64Codec struct {
 }
 
 func (codec *uint64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint64)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*uint64)(ptr)) = iter.ReadUint64()
 	}
-	*((*uint64)(ptr)) = iter.ReadUint64()
 }
 
 func (codec *uint64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -285,11 +264,9 @@ type float32Codec struct {
 }
 
 func (codec *float32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*float32)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*float32)(ptr)) = iter.ReadFloat32()
 	}
-	*((*float32)(ptr)) = iter.ReadFloat32()
 }
 
 func (codec *float32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -308,11 +285,9 @@ type float64Codec struct {
 }
 
 func (codec *float64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*float64)(ptr)) = 0
-		return
+	if !iter.ReadNil() {
+		*((*float64)(ptr)) = iter.ReadFloat64()
 	}
-	*((*float64)(ptr)) = iter.ReadFloat64()
 }
 
 func (codec *float64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -352,13 +327,39 @@ type emptyInterfaceCodec struct {
 }
 
 func (codec *emptyInterfaceCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*interface{})(ptr)) = nil
+	existing := *((*interface{})(ptr))
+
+	// Checking for both typed and untyped nil pointers.
+	if existing != nil &&
+		reflect.TypeOf(existing).Kind() == reflect.Ptr &&
+		!reflect.ValueOf(existing).IsNil() {
+
+		var ptrToExisting interface{}
+		for {
+			elem := reflect.ValueOf(existing).Elem()
+			if elem.Kind() != reflect.Ptr || elem.IsNil() {
+				break
+			}
+			ptrToExisting = existing
+			existing = elem.Interface()
+		}
+
+		if iter.ReadNil() {
+			if ptrToExisting != nil {
+				nilPtr := reflect.Zero(reflect.TypeOf(ptrToExisting).Elem())
+				reflect.ValueOf(ptrToExisting).Elem().Set(nilPtr)
+			} else {
+				*((*interface{})(ptr)) = nil
+			}
+		} else {
+			iter.ReadVal(existing)
+		}
+
 		return
 	}
-	existing := *((*interface{})(ptr))
-	if existing != nil && reflect.TypeOf(existing).Kind() == reflect.Ptr {
-		iter.ReadVal(existing)
+
+	if iter.ReadNil() {
+		*((*interface{})(ptr)) = nil
 	} else {
 		*((*interface{})(ptr)) = iter.Read()
 	}
@@ -391,15 +392,20 @@ func (codec *nonEmptyInterfaceCodec) Decode(ptr unsafe.Pointer, iter *Iterator)
 	e.typ = nonEmptyInterface.itab.typ
 	e.word = nonEmptyInterface.word
 	iter.ReadVal(&i)
+	if e.word == nil {
+		nonEmptyInterface.itab = nil
+	}
 	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
+	if nonEmptyInterface.itab != nil {
+		e := (*emptyInterface)(unsafe.Pointer(&i))
+		e.typ = nonEmptyInterface.itab.typ
+		e.word = nonEmptyInterface.word
+	}
 	stream.WriteVal(i)
 }
 
@@ -435,7 +441,15 @@ type jsonNumberCodec struct {
 }
 
 func (codec *jsonNumberCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*json.Number)(ptr)) = json.Number([]byte(iter.readNumberAsString()))
+	switch iter.WhatIsNext() {
+	case StringValue:
+		*((*json.Number)(ptr)) = json.Number(iter.ReadString())
+	case NilValue:
+		iter.skipFourBytes('n', 'u', 'l', 'l')
+		*((*json.Number)(ptr)) = ""
+	default:
+		*((*json.Number)(ptr)) = json.Number([]byte(iter.readNumberAsString()))
+	}
 }
 
 func (codec *jsonNumberCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -454,7 +468,15 @@ type jsoniterNumberCodec struct {
 }
 
 func (codec *jsoniterNumberCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*Number)(ptr)) = Number([]byte(iter.readNumberAsString()))
+	switch iter.WhatIsNext() {
+	case StringValue:
+		*((*Number)(ptr)) = Number(iter.ReadString())
+	case NilValue:
+		iter.skipFourBytes('n', 'u', 'l', 'l')
+		*((*Number)(ptr)) = ""
+	default:
+		*((*Number)(ptr)) = Number([]byte(iter.readNumberAsString()))
+	}
 }
 
 func (codec *jsoniterNumberCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -586,7 +608,7 @@ type stringModeNumberDecoder struct {
 func (decoder *stringModeNumberDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
 	c := iter.nextToken()
 	if c != '"' {
-		iter.ReportError("stringModeNumberDecoder", `expect "`)
+		iter.ReportError("stringModeNumberDecoder", `expect ", but found `+string([]byte{c}))
 		return
 	}
 	decoder.elemDecoder.Decode(ptr, iter)
@@ -595,7 +617,7 @@ func (decoder *stringModeNumberDecoder) Decode(ptr unsafe.Pointer, iter *Iterato
 	}
 	c = iter.readByte()
 	if c != '"' {
-		iter.ReportError("stringModeNumberDecoder", `expect "`)
+		iter.ReportError("stringModeNumberDecoder", `expect ", but found `+string([]byte{c}))
 		return
 	}
 }
@@ -660,7 +682,11 @@ func (encoder *marshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 	templateInterface := encoder.templateInterface
 	templateInterface.word = ptr
 	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
-	marshaler := (*realInterface).(json.Marshaler)
+	marshaler, ok := (*realInterface).(json.Marshaler)
+	if !ok {
+		stream.WriteVal(nil)
+		return
+	}
 
 	bytes, err := marshaler.MarshalJSON()
 	if err != nil {

feature_stream.go

@@ -191,6 +191,9 @@ func (stream *Stream) ensure(minimal int) {
 func (stream *Stream) growAtLeast(minimal int) {
 	if stream.out != nil {
 		stream.Flush()
+		if stream.Available() >= minimal {
+			return
+		}
 	}
 	toGrow := len(stream.buf)
 	if toGrow < minimal {
@@ -280,8 +283,7 @@ func (stream *Stream) WriteArrayStart() {
 
 // WriteEmptyArray write []
 func (stream *Stream) WriteEmptyArray() {
-	stream.writeByte('[')
-	stream.writeByte(']')
+	stream.writeTwoBytes('[', ']')
 }
 
 // WriteArrayEnd write ] with possible indention

jsoniter_bool_test.go

@@ -92,22 +92,22 @@ func Test_bool_can_be_null(t *testing.T) {
 	obj := TestData{}
 	data1 := []byte(`{"field": true}`)
 	err := Unmarshal(data1, &obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(true, obj.Field)
 
 	data2 := []byte(`{"field": null}`)
 	err = Unmarshal(data2, &obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	// Same behavior as stdlib, not touching the existing value.
 	should.Equal(true, obj.Field)
 
 	// Checking stdlib behavior as well
 	obj2 := TestData{}
 	err = json.Unmarshal(data1, &obj2)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(true, obj2.Field)
 
 	err = json.Unmarshal(data2, &obj2)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(true, obj2.Field)
 }

jsoniter_customize_test.go

@@ -2,11 +2,12 @@ package jsoniter
 
 import (
 	"encoding/json"
-	"github.com/stretchr/testify/require"
 	"strconv"
 	"testing"
 	"time"
 	"unsafe"
+
+	"github.com/stretchr/testify/require"
 )
 
 func Test_customize_type_decoder(t *testing.T) {
@@ -82,7 +83,7 @@ func Test_customize_field_decoder(t *testing.T) {
 }
 
 type TestObject1 struct {
-	field1 string
+	Field1 string
 }
 
 type testExtension struct {
@@ -93,7 +94,7 @@ func (extension *testExtension) UpdateStructDescriptor(structDescriptor *StructD
 	if structDescriptor.Type.String() != "jsoniter.TestObject1" {
 		return
 	}
-	binding := structDescriptor.GetField("field1")
+	binding := structDescriptor.GetField("Field1")
 	binding.Encoder = &funcEncoder{fun: func(ptr unsafe.Pointer, stream *Stream) {
 		str := *((*string)(ptr))
 		val, _ := strconv.Atoi(str)
@@ -112,7 +113,7 @@ func Test_customize_field_by_extension(t *testing.T) {
 	obj := TestObject1{}
 	err := UnmarshalFromString(`{"field-1": 100}`, &obj)
 	should.Nil(err)
-	should.Equal("100", obj.field1)
+	should.Equal("100", obj.Field1)
 	str, err := MarshalToString(obj)
 	should.Nil(err)
 	should.Equal(`{"field-1":100}`, str)

jsoniter_enum_marshaler_test.go

@@ -40,11 +40,11 @@ func Test_custom_marshaler_on_enum(t *testing.T) {
 	w := Wrapper{Payload: MyEnumB}
 
 	jb, err := Marshal(w)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(`{"Payload":"foo-1"}`, string(jb))
 
 	var w2 Wrapper2
 	err = Unmarshal(jb, &w2)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(MyEnumB, w2.Payload)
 }

jsoniter_int_test.go

@@ -506,6 +506,30 @@ func Test_jsoniter_number(t *testing.T) {
 	should.Equal("1", str)
 }
 
+func Test_non_numeric_as_number(t *testing.T) {
+	should := require.New(t)
+	var v1 json.Number
+	err := Unmarshal([]byte(`"500"`), &v1)
+	should.Nil(err)
+	should.Equal("500", string(v1))
+	var v2 Number
+	err = Unmarshal([]byte(`"500"`), &v2)
+	should.Nil(err)
+	should.Equal("500", string(v2))
+}
+
+func Test_null_as_number(t *testing.T) {
+	should := require.New(t)
+	var v1 json.Number
+	err := json.Unmarshal([]byte(`null`), &v1)
+	should.Nil(err)
+	should.Equal("", string(v1))
+	var v2 Number
+	err = Unmarshal([]byte(`null`), &v2)
+	should.Nil(err)
+	should.Equal("", string(v2))
+}
+
 func Benchmark_jsoniter_encode_int(b *testing.B) {
 	stream := NewStream(ConfigDefault, ioutil.Discard, 64)
 	for n := 0; n < b.N; n++ {

jsoniter_interface_test.go

@@ -329,13 +329,13 @@ func Test_nil_out_null_interface(t *testing.T) {
 	data1 := []byte(`{"field": true}`)
 
 	err := Unmarshal(data1, &obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(true, *(obj.Field.(*bool)))
 
 	data2 := []byte(`{"field": null}`)
 
 	err = Unmarshal(data2, &obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(nil, obj.Field)
 
 	// Checking stdlib behavior matches.
@@ -344,11 +344,11 @@ func Test_nil_out_null_interface(t *testing.T) {
 	}
 
 	err = json.Unmarshal(data1, &obj2)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(true, *(obj2.Field.(*bool)))
 
 	err = json.Unmarshal(data2, &obj2)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(nil, obj2.Field)
 }
 
@@ -363,10 +363,198 @@ func Test_omitempty_nil_interface(t *testing.T) {
 	}
 
 	js, err := json.Marshal(obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal("{}", string(js))
 
 	str, err := MarshalToString(obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(string(js), str)
 }
+
+func Test_omitempty_nil_nonempty_interface(t *testing.T) {
+	type TestData struct {
+		Field MyInterface `json:"field,omitempty"`
+	}
+	should := require.New(t)
+
+	obj := TestData{
+		Field: nil,
+	}
+
+	js, err := json.Marshal(obj)
+	should.NoError(err)
+	should.Equal("{}", string(js))
+
+	str, err := MarshalToString(obj)
+	should.NoError(err)
+	should.Equal(string(js), str)
+
+	obj.Field = MyString("hello")
+	err = UnmarshalFromString(`{"field":null}`, &obj)
+	should.NoError(err)
+	should.Equal(nil, obj.Field)
+}
+
+func Test_marshal_nil_marshaler_interface(t *testing.T) {
+	type TestData struct {
+		Field json.Marshaler `json:"field"`
+	}
+	should := require.New(t)
+
+	obj := TestData{
+		Field: nil,
+	}
+
+	js, err := json.Marshal(obj)
+	should.NoError(err)
+	should.Equal(`{"field":null}`, string(js))
+
+	str, err := MarshalToString(obj)
+	should.NoError(err)
+	should.Equal(string(js), str)
+}
+
+func Test_marshal_nil_nonempty_interface(t *testing.T) {
+	type TestData struct {
+		Field MyInterface `json:"field"`
+	}
+	should := require.New(t)
+
+	obj := TestData{
+		Field: nil,
+	}
+
+	js, err := json.Marshal(obj)
+	should.NoError(err)
+	should.Equal(`{"field":null}`, string(js))
+
+	str, err := MarshalToString(obj)
+	should.NoError(err)
+	should.Equal(string(js), str)
+
+	obj.Field = MyString("hello")
+	err = Unmarshal(js, &obj)
+	should.NoError(err)
+	should.Equal(nil, obj.Field)
+}
+
+func Test_overwrite_interface_ptr_value_with_nil(t *testing.T) {
+	type Wrapper struct {
+		Payload interface{} `json:"payload,omitempty"`
+	}
+	type Payload struct {
+		Value int `json:"val,omitempty"`
+	}
+
+	should := require.New(t)
+
+	payload := &Payload{}
+	wrapper := &Wrapper{
+		Payload: &payload,
+	}
+
+	err := json.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(&payload, wrapper.Payload)
+	should.Equal(42, (*(wrapper.Payload.(**Payload))).Value)
+
+	err = json.Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(&payload, wrapper.Payload)
+	should.Equal((*Payload)(nil), payload)
+
+	payload = &Payload{}
+	wrapper = &Wrapper{
+		Payload: &payload,
+	}
+
+	err = Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(&payload, wrapper.Payload)
+	should.Equal(42, (*(wrapper.Payload.(**Payload))).Value)
+
+	err = Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(&payload, wrapper.Payload)
+	should.Equal((*Payload)(nil), payload)
+}
+
+func Test_overwrite_interface_value_with_nil(t *testing.T) {
+	type Wrapper struct {
+		Payload interface{} `json:"payload,omitempty"`
+	}
+	type Payload struct {
+		Value int `json:"val,omitempty"`
+	}
+
+	should := require.New(t)
+
+	payload := &Payload{}
+	wrapper := &Wrapper{
+		Payload: payload,
+	}
+
+	err := json.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(42, (*(wrapper.Payload.(*Payload))).Value)
+
+	err = json.Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(nil, wrapper.Payload)
+	should.Equal(42, payload.Value)
+
+	payload = &Payload{}
+	wrapper = &Wrapper{
+		Payload: payload,
+	}
+
+	err = Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(42, (*(wrapper.Payload.(*Payload))).Value)
+
+	err = Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(nil, wrapper.Payload)
+	should.Equal(42, payload.Value)
+}
+
+func Test_unmarshal_into_nil(t *testing.T) {
+	type Payload struct {
+		Value int `json:"val,omitempty"`
+	}
+	type Wrapper struct {
+		Payload interface{} `json:"payload,omitempty"`
+	}
+
+	should := require.New(t)
+
+	var payload *Payload
+	wrapper := &Wrapper{
+		Payload: payload,
+	}
+
+	err := json.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Nil(err)
+	should.NotNil(wrapper.Payload)
+	should.Nil(payload)
+
+	err = json.Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Nil(err)
+	should.Nil(wrapper.Payload)
+	should.Nil(payload)
+
+	payload = nil
+	wrapper = &Wrapper{
+		Payload: payload,
+	}
+
+	err = Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Nil(err)
+	should.NotNil(wrapper.Payload)
+	should.Nil(payload)
+
+	err = Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Nil(err)
+	should.Nil(wrapper.Payload)
+	should.Nil(payload)
+}

jsoniter_invalid_test.go

@@ -130,3 +130,9 @@ func Test_invalid_number(t *testing.T) {
 	should.Nil(err)
 	should.Equal(string(result2), string(result))
 }
+
+func Test_valid(t *testing.T) {
+	should := require.New(t)
+	should.True(Valid([]byte(`{}`)))
+	should.False(Valid([]byte(`{`)))
+}

jsoniter_null_test.go

@@ -3,9 +3,10 @@ package jsoniter
 import (
 	"bytes"
 	"encoding/json"
-	"github.com/stretchr/testify/require"
 	"io"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func Test_read_null(t *testing.T) {
@@ -135,3 +136,33 @@ func Test_encode_nil_array(t *testing.T) {
 	should.Nil(err)
 	should.Equal("null", string(output))
 }
+
+func Test_decode_nil_num(t *testing.T) {
+	type TestData struct {
+		Field int `json:"field"`
+	}
+	should := require.New(t)
+
+	data1 := []byte(`{"field": 42}`)
+	data2 := []byte(`{"field": null}`)
+
+	// Checking stdlib behavior as well
+	obj2 := TestData{}
+	err := json.Unmarshal(data1, &obj2)
+	should.Equal(nil, err)
+	should.Equal(42, obj2.Field)
+
+	err = json.Unmarshal(data2, &obj2)
+	should.Equal(nil, err)
+	should.Equal(42, obj2.Field)
+
+	obj := TestData{}
+
+	err = Unmarshal(data1, &obj)
+	should.Equal(nil, err)
+	should.Equal(42, obj.Field)
+
+	err = Unmarshal(data2, &obj)
+	should.Equal(nil, err)
+	should.Equal(42, obj.Field)
+}

jsoniter_raw_message_test.go

@@ -3,6 +3,7 @@ package jsoniter
 import (
 	"encoding/json"
 	"github.com/stretchr/testify/require"
+	"strings"
 	"testing"
 )
 
@@ -86,3 +87,28 @@ func Test_marshal_invalid_json_raw_message(t *testing.T) {
 	should.Equal(`{"raw":null}`, string(aout))
 	should.Nil(aouterr)
 }
+
+func Test_raw_message_memory_not_copied_issue(t *testing.T) {
+	jsonStream := `{"name":"xxxxx","bundle_id":"com.zonst.majiang","app_platform":"ios","app_category":"100103", "budget_day":1000,"bidding_min":1,"bidding_max":2,"bidding_type":"CPM", "freq":{"open":true,"type":"day","num":100},"speed":1, "targeting":{"vendor":{"open":true,"list":["zonst"]}, "geo_code":{"open":true,"list":["156110100"]},"app_category":{"open":true,"list":["100101"]}, "day_parting":{"open":true,"list":["100409","100410"]},"device_type":{"open":true,"list":["ipad"]}, "os_version":{"open":true,"list":[10]},"carrier":{"open":true,"list":["mobile"]}, "network":{"open":true,"list":["4G"]}},"url":{"tracking_imp_url":"http://www.baidu.com", "tracking_clk_url":"http://www.baidu.com","jump_url":"http://www.baidu.com","deep_link_url":"http://www.baidu.com"}}`
+	type IteratorObject struct {
+		Name        *string     `json:"name"`
+		BundleId    *string     `json:"bundle_id"`
+		AppCategory *string     `json:"app_category"`
+		AppPlatform *string     `json:"app_platform"`
+		BudgetDay   *float32    `json:"budget_day"`
+		BiddingMax  *float32    `json:"bidding_max"`
+		BiddingMin  *float32    `json:"bidding_min"`
+		BiddingType *string     `json:"bidding_type"`
+		Freq        *RawMessage `json:"freq"`
+		Targeting   *RawMessage `json:"targeting"`
+		Url         *RawMessage `json:"url"`
+		Speed       *int        `json:"speed" db:"speed"`
+	}
+
+	obj := &IteratorObject{}
+	decoder := NewDecoder(strings.NewReader(jsonStream))
+	err := decoder.Decode(obj)
+	should := require.New(t)
+	should.Nil(err)
+	should.Equal(`{"open":true,"type":"day","num":100}`, string(*obj.Freq))
+}

jsoniter_stream_test.go

@@ -51,3 +51,19 @@ func Test_writeString_should_grow_buffer(t *testing.T) {
 	should.Nil(stream.Error)
 	should.Equal(`"123"`, string(stream.Buffer()))
 }
+
+type NopWriter struct {
+	bufferSize int
+}
+
+func (w *NopWriter) Write(p []byte) (n int, err error) {
+	w.bufferSize = cap(p)
+	return len(p), nil
+}
+
+func Test_flush_buffer_should_stop_grow_buffer(t *testing.T) {
+	writer := new(NopWriter)
+	NewEncoder(writer).Encode(make([]int, 10000000))
+	should := require.New(t)
+	should.Equal(512, writer.bufferSize)
+}

jsoniter_struct_encoder_test.go

@@ -0,0 +1,52 @@
+package jsoniter
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+func Test_encode_unexported_field(t *testing.T) {
+	type TestData struct {
+		a int
+		b <-chan int
+		C int
+		d *time.Timer
+	}
+
+	should := require.New(t)
+
+	testChan := make(<-chan int, 10)
+	testTimer := time.NewTimer(10 * time.Second)
+
+	obj := &TestData{
+		a: 42,
+		b: testChan,
+		C: 21,
+		d: testTimer,
+	}
+
+	jb, err := json.Marshal(obj)
+	should.NoError(err)
+	should.Equal([]byte(`{"C":21}`), jb)
+
+	err = json.Unmarshal([]byte(`{"a": 444, "b":"bad", "C":55, "d":{"not": "a timer"}}`), obj)
+	should.NoError(err)
+	should.Equal(42, obj.a)
+	should.Equal(testChan, obj.b)
+	should.Equal(55, obj.C)
+	should.Equal(testTimer, obj.d)
+
+	jb, err = Marshal(obj)
+	should.NoError(err)
+	should.Equal(jb, []byte(`{"C":55}`))
+
+	err = Unmarshal([]byte(`{"a": 444, "b":"bad", "C":256, "d":{"not":"a timer"}}`), obj)
+	should.NoError(err)
+	should.Equal(42, obj.a)
+	should.Equal(testChan, obj.b)
+	should.Equal(256, obj.C)
+	should.Equal(testTimer, obj.d)
+}