#53 support escapeHtml

2025-10-31 00:07:40 +02:00 · 2017-06-15 23:54:43 +08:00
parent d867c8ba5c
commit 5f22e50c89
30 changed files with 590 additions and 249 deletions
--- a/feature_adapter.go
+++ b/feature_adapter.go
@@ -26,7 +26,7 @@ import (
 // Refer to https://godoc.org/encoding/json#Unmarshal for more information
 func Unmarshal(data []byte, v interface{}) error {
 	data = data[:lastNotSpacePos(data)]
-	iter := ParseBytes(DEFAULT_CONFIG, data)
+	iter := ParseBytes(ConfigOfDefault, data)
 	typ := reflect.TypeOf(v)
 	if typ.Kind() != reflect.Ptr {
 		// return non-pointer error
@@ -48,7 +48,7 @@ func Unmarshal(data []byte, v interface{}) error {
 // UnmarshalAny adapts to
 func UnmarshalAny(data []byte) (Any, error) {
 	data = data[:lastNotSpacePos(data)]
-	iter := ParseBytes(DEFAULT_CONFIG, data)
+	iter := ParseBytes(ConfigOfDefault, data)
 	any := iter.ReadAny()
 	if iter.head == iter.tail {
 		iter.loadMore()
@@ -74,7 +74,7 @@ func lastNotSpacePos(data []byte) int {
 func UnmarshalFromString(str string, v interface{}) error {
 	data := []byte(str)
 	data = data[:lastNotSpacePos(data)]
-	iter := ParseBytes(DEFAULT_CONFIG, data)
+	iter := ParseBytes(ConfigOfDefault, data)
 	iter.ReadVal(v)
 	if iter.head == iter.tail {
 		iter.loadMore()
@@ -91,7 +91,7 @@ func UnmarshalFromString(str string, v interface{}) error {
 func UnmarshalAnyFromString(str string) (Any, error) {
 	data := []byte(str)
 	data = data[:lastNotSpacePos(data)]
-	iter := ParseBytes(DEFAULT_CONFIG, data)
+	iter := ParseBytes(ConfigOfDefault, data)
 	any := iter.ReadAny()
 	if iter.head == iter.tail {
 		iter.loadMore()
@@ -110,7 +110,7 @@ func UnmarshalAnyFromString(str string) (Any, error) {
 // 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) {
-	stream := NewStream(DEFAULT_CONFIG, nil, 256)
+	stream := NewStream(ConfigOfDefault, nil, 256)
 	stream.WriteVal(v)
 	if stream.Error != nil {
 		return nil, stream.Error
@@ -133,7 +133,7 @@ func MarshalToString(v interface{}) (string, error) {
 // 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 {
-	iter := Parse(DEFAULT_CONFIG, reader, 512)
+	iter := Parse(ConfigOfDefault, reader, 512)
 	return &AdaptedDecoder{iter}
 }

--- a/feature_any_array.go
+++ b/feature_any_array.go
@@ -22,7 +22,7 @@ func (any *arrayLazyAny) ValueType() ValueType {
 func (any *arrayLazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator(DEFAULT_CONFIG)
+		iter = NewIterator(ConfigOfDefault)
 		any.iter = iter
 	}
 	iter.ResetBytes(any.remaining)
@@ -287,7 +287,7 @@ func (any *arrayLazyAny) IterateArray() (func() (Any, bool), bool) {
 			// read from buffer
 			iter := any.iter
 			if iter == nil {
-				iter = NewIterator(DEFAULT_CONFIG)
+				iter = NewIterator(ConfigOfDefault)
 				any.iter = iter
 			}
 			iter.ResetBytes(remaining)
--- a/feature_any_float.go
+++ b/feature_any_float.go
@@ -17,7 +17,7 @@ type float64LazyAny struct {
 func (any *float64LazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator(DEFAULT_CONFIG)
+		iter = NewIterator(ConfigOfDefault)
 	}
 	iter.ResetBytes(any.buf)
 	return iter
--- a/feature_any_int64.go
+++ b/feature_any_int64.go
@@ -21,7 +21,7 @@ func (any *int64LazyAny) ValueType() ValueType {
 func (any *int64LazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator(DEFAULT_CONFIG)
+		iter = NewIterator(ConfigOfDefault)
 	}
 	iter.ResetBytes(any.buf)
 	return iter
--- a/feature_any_object.go
+++ b/feature_any_object.go
@@ -22,7 +22,7 @@ func (any *objectLazyAny) ValueType() ValueType {
 func (any *objectLazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator(DEFAULT_CONFIG)
+		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(DEFAULT_CONFIG)
+				iter = NewIterator(ConfigOfDefault)
 				any.iter = iter
 			}
 			iter.ResetBytes(remaining)
--- a/feature_any_string.go
+++ b/feature_any_string.go
@@ -20,7 +20,7 @@ func (any *stringLazyAny) ValueType() ValueType {
 func (any *stringLazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator(DEFAULT_CONFIG)
+		iter = NewIterator(ConfigOfDefault)
 		any.iter = iter
 	}
 	iter.ResetBytes(any.buf)
--- a/feature_any_uint64.go
+++ b/feature_any_uint64.go
@@ -21,7 +21,7 @@ func (any *uint64LazyAny) ValueType() ValueType {
 func (any *uint64LazyAny) Parse() *Iterator {
 	iter := any.iter
 	if iter == nil {
-		iter = NewIterator(DEFAULT_CONFIG)
+		iter = NewIterator(ConfigOfDefault)
 	}
 	iter.ResetBytes(any.buf)
 	return iter
--- a/feature_config.go
+++ b/feature_config.go
@@ -11,6 +11,7 @@ type Config struct {
 	IndentionStep                 int
 	MarshalFloatWith6Digits       bool
 	SupportUnexportedStructFields bool
+	EscapeHtml		      bool
 }

 type frozenConfig struct {
@@ -20,7 +21,12 @@ type frozenConfig struct {
 	extensions                    []ExtensionFunc
 }

-var DEFAULT_CONFIG = Config{}.Froze()
+var ConfigOfDefault = Config{}.Froze()
+
+// Trying to be 100% compatible with standard library behavior
+var ConfigCompatibleWithStandardLibrary = Config{
+	EscapeHtml: true,
+}.Froze()

 func (cfg Config) Froze() *frozenConfig {
 	frozenConfig := &frozenConfig{
@@ -34,16 +40,19 @@ func (cfg Config) Froze() *frozenConfig {
 	if cfg.SupportUnexportedStructFields {
 		frozenConfig.supportUnexportedStructFields()
 	}
+	if cfg.EscapeHtml {
+		frozenConfig.escapeHtml()
+	}
 	return frozenConfig
 }

 // RegisterExtension can register a custom extension
-func (cfg *frozenConfig) RegisterExtension(extension ExtensionFunc) {
+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) {
+	cfg.registerExtension(func(type_ reflect.Type, field *reflect.StructField) ([]string, EncoderFunc, DecoderFunc) {
 		return []string{field.Name}, nil, nil
 	})
 }
@@ -62,6 +71,14 @@ func (cfg *frozenConfig) marshalFloatWith6Digits() {
 	}})
 }

+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 {
--- a/feature_stream.go
+++ b/feature_stream.go
@@ -197,64 +197,6 @@ func (b *Stream) WriteRaw(s string) {
 	b.n += n
 }

-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
-	// 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')
 }
--- a/feature_stream_string.go
+++ b/feature_stream_string.go
@@ -0,0 +1,367 @@
+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 > 31 && htmlSafeSet[c] {
+			stream.buf[n] = c
+			n++
+		} else {
+			break
+		}
+	}
+	if i == valLen {
+		stream.buf[n] = '"'
+		n++
+		stream.n = n
+		return
+	}
+	stream.n = n
+	start := 0
+	// for the remaining parts, we process them char by char
+	for ; i < valLen; i++ {
+		if b := s[i]; b < utf8.RuneSelf {
+			if htmlSafeSet[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('"')
+}
+
+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
+	// for the remaining parts, we process them char by char
+	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)
+		}
+	}
+	stream.writeByte('"')
+}
--- a/jsoniter_array_test.go
+++ b/jsoniter_array_test.go
@@ -10,10 +10,10 @@ import (

 func Test_empty_array(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `[]`)
+	iter := ParseString(ConfigOfDefault, `[]`)
 	cont := iter.ReadArray()
 	should.False(cont)
-	iter = ParseString(DEFAULT_CONFIG, `[]`)
+	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(DEFAULT_CONFIG, `[1]`)
+	iter := ParseString(ConfigOfDefault, `[1]`)
 	should.True(iter.ReadArray())
 	should.Equal(1, iter.ReadInt())
 	should.False(iter.ReadArray())
-	iter = ParseString(DEFAULT_CONFIG, `[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(DEFAULT_CONFIG, `[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(DEFAULT_CONFIG, `[1,2]`)
+	iter = ParseString(ConfigOfDefault, `[1,2]`)
 	should.Equal([]interface{}{float64(1), float64(2)}, iter.Read())
 }

@@ -152,7 +152,7 @@ func Test_invalid_array(t *testing.T) {
 }

 func Test_whitespace_in_head(t *testing.T) {
-	iter := ParseString(DEFAULT_CONFIG, ` [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(DEFAULT_CONFIG, `[ 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(DEFAULT_CONFIG, `[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(DEFAULT_CONFIG, `[1 ,2]`)
+	iter := ParseString(ConfigOfDefault, `[1 ,2]`)
 	cont := iter.ReadArray()
 	if cont != true {
 		t.FailNow()
@@ -287,7 +287,7 @@ func Test_decode_byte_array(t *testing.T) {
 func Benchmark_jsoniter_array(b *testing.B) {
 	b.ReportAllocs()
 	input := []byte(`[1,2,3,4,5,6,7,8,9]`)
-	iter := ParseBytes(DEFAULT_CONFIG, input)
+	iter := ParseBytes(ConfigOfDefault, input)
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
 		iter.ResetBytes(input)
--- a/jsoniter_base64_test.go
+++ b/jsoniter_base64_test.go
--- a/jsoniter_bool_test.go
+++ b/jsoniter_bool_test.go
@@ -8,15 +8,15 @@ import (

 func Test_true(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `true`)
+	iter := ParseString(ConfigOfDefault, `true`)
 	should.True(iter.ReadBool())
-	iter = ParseString(DEFAULT_CONFIG, `true`)
+	iter = ParseString(ConfigOfDefault, `true`)
 	should.Equal(true, iter.Read())
 }

 func Test_false(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	stream.WriteTrue()
 	stream.WriteFalse()
 	stream.Flush()
@@ -41,7 +41,7 @@ func Test_write_true_false(t *testing.T) {
 func Test_write_val_bool(t *testing.T) {
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(DEFAULT_CONFIG, buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	stream.WriteVal(true)
 	stream.Flush()
 	should.Nil(stream.Error)
--- a/jsoniter_customize_test.go
+++ b/jsoniter_customize_test.go
@@ -19,7 +19,7 @@ func Test_customize_type_decoder(t *testing.T) {
 		}
 		*((*time.Time)(ptr)) = t
 	})
-	defer DEFAULT_CONFIG.CleanDecoders()
+	defer ConfigOfDefault.CleanDecoders()
 	val := time.Time{}
 	err := Unmarshal([]byte(`"2016-12-05 08:43:28"`), &val)
 	if err != nil {
@@ -37,7 +37,7 @@ func Test_customize_type_encoder(t *testing.T) {
 		t := *((*time.Time)(ptr))
 		stream.WriteString(t.UTC().Format("2006-01-02 15:04:05"))
 	})
-	defer DEFAULT_CONFIG.CleanEncoders()
+	defer ConfigOfDefault.CleanEncoders()
 	val := time.Unix(0, 0)
 	str, err := MarshalToString(val)
 	should.Nil(err)
@@ -45,13 +45,13 @@ func Test_customize_type_encoder(t *testing.T) {
 }

 func Test_customize_byte_array_encoder(t *testing.T) {
-	DEFAULT_CONFIG.CleanEncoders()
+	ConfigOfDefault.CleanEncoders()
 	should := require.New(t)
 	RegisterTypeEncoder("[]uint8", func(ptr unsafe.Pointer, stream *Stream) {
 		t := *((*[]byte)(ptr))
 		stream.WriteString(string(t))
 	})
-	defer DEFAULT_CONFIG.CleanEncoders()
+	defer ConfigOfDefault.CleanEncoders()
 	val := []byte("abc")
 	str, err := MarshalToString(val)
 	should.Nil(err)
@@ -74,7 +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 DEFAULT_CONFIG.CleanDecoders()
+	defer ConfigOfDefault.CleanDecoders()
 	tom := Tom{}
 	err := Unmarshal([]byte(`{"field1": 100}`), &tom)
 	if err != nil {
--- a/jsoniter_demo_test.go
+++ b/jsoniter_demo_test.go
@@ -16,7 +16,7 @@ func Test_bind_api_demo(t *testing.T) {
 }

 func Test_iterator_api_demo(t *testing.T) {
-	iter := ParseString(DEFAULT_CONFIG, `[0,1,2,3]`)
+	iter := ParseString(ConfigOfDefault, `[0,1,2,3]`)
 	total := 0
 	for iter.ReadArray() {
 		total += iter.ReadInt()
--- a/jsoniter_find_end_test.go
+++ b/jsoniter_find_end_test.go
@@ -7,56 +7,56 @@ import (
 )

 func Test_string_end(t *testing.T) {
-	end, escaped := ParseString(DEFAULT_CONFIG, `abc"`).findStringEnd()
+	end, escaped := ParseString(ConfigOfDefault, `abc"`).findStringEnd()
 	if end != 4 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(DEFAULT_CONFIG, `abc\\"`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\\"`).findStringEnd()
 	if end != 6 {
 		t.Fatal(end)
 	}
 	if escaped != true {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(DEFAULT_CONFIG, `abc\\\\"`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\\\\"`).findStringEnd()
 	if end != 8 {
 		t.Fatal(end)
 	}
 	if escaped != true {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(DEFAULT_CONFIG, `abc\"`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\"`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(DEFAULT_CONFIG, `abc\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != true {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(DEFAULT_CONFIG, `abc\\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(DEFAULT_CONFIG, `\\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `\\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(DEFAULT_CONFIG, `\`).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(DEFAULT_CONFIG, `"abc`)
+	iter := ParseString(ConfigOfDefault, `"abc`)
 	iter.skipString()
 	should.Equal(1, iter.head)
-	iter = ParseString(DEFAULT_CONFIG, `\""abc`)
+	iter = ParseString(ConfigOfDefault, `\""abc`)
 	iter.skipString()
 	should.Equal(3, iter.head)
 	reader := &StagedReader{
 		r1: `abc`,
 		r2: `"`,
 	}
-	iter = Parse(DEFAULT_CONFIG, reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
 	should.Equal(1, iter.head)
 	reader = &StagedReader{
 		r1: `abc`,
 		r2: `1"`,
 	}
-	iter = Parse(DEFAULT_CONFIG, reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
 	should.Equal(2, iter.head)
 	reader = &StagedReader{
 		r1: `abc\`,
 		r2: `"`,
 	}
-	iter = Parse(DEFAULT_CONFIG, reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
 	should.NotNil(iter.Error)
 	reader = &StagedReader{
 		r1: `abc\`,
 		r2: `""`,
 	}
-	iter = Parse(DEFAULT_CONFIG, reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
 	should.Equal(2, iter.head)
 }

 func Test_skip_object(t *testing.T) {
-	iter := ParseString(DEFAULT_CONFIG, `}`)
+	iter := ParseString(ConfigOfDefault, `}`)
 	iter.skipObject()
 	if iter.head != 1 {
 		t.Fatal(iter.head)
 	}
-	iter = ParseString(DEFAULT_CONFIG, `a}`)
+	iter = ParseString(ConfigOfDefault, `a}`)
 	iter.skipObject()
 	if iter.head != 2 {
 		t.Fatal(iter.head)
 	}
-	iter = ParseString(DEFAULT_CONFIG, `{}}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(DEFAULT_CONFIG, reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipObject()
 	if iter.head != 2 {
 		t.Fatal(iter.head)
 	}
-	iter = ParseString(DEFAULT_CONFIG, `"}"}a`)
+	iter = ParseString(ConfigOfDefault, `"}"}a`)
 	iter.skipObject()
 	if iter.head != 4 {
 		t.Fatal(iter.head)
--- a/jsoniter_float_test.go
+++ b/jsoniter_float_test.go
@@ -11,7 +11,7 @@ import (

 func Test_read_big_float(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `12.3`)
+	iter := ParseString(ConfigOfDefault, `12.3`)
 	val := iter.ReadBigFloat()
 	val64, _ := val.Float64()
 	should.Equal(12.3, val64)
@@ -19,7 +19,7 @@ func Test_read_big_float(t *testing.T) {

 func Test_read_big_int(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `92233720368547758079223372036854775807`)
+	iter := ParseString(ConfigOfDefault, `92233720368547758079223372036854775807`)
 	val := iter.ReadBigInt()
 	should.NotNil(val)
 	should.Equal(`92233720368547758079223372036854775807`, val.String())
@@ -31,14 +31,14 @@ func Test_read_float(t *testing.T) {
 		// non-streaming
 		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, input+",")
+			iter := ParseString(ConfigOfDefault, input+",")
 			expected, err := strconv.ParseFloat(input, 64)
 			should.Nil(err)
 			should.Equal(expected, iter.ReadFloat64())
@@ -46,14 +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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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())
@@ -63,7 +63,7 @@ func Test_read_float(t *testing.T) {

 func Test_read_float_as_interface(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `12.3`)
+	iter := ParseString(ConfigOfDefault, `12.3`)
 	should.Equal(float64(12.3), iter.Read())
 }

@@ -90,7 +90,7 @@ 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(DEFAULT_CONFIG, buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteFloat32Lossy(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -99,7 +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(DEFAULT_CONFIG, buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -108,7 +108,7 @@ func Test_write_float32(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(DEFAULT_CONFIG, buf, 10)
+	stream := NewStream(ConfigOfDefault, buf, 10)
 	stream.WriteRaw("abcdefg")
 	stream.WriteFloat32Lossy(1.123456)
 	stream.Flush()
@@ -123,7 +123,7 @@ 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(DEFAULT_CONFIG, buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteFloat64Lossy(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -132,7 +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(DEFAULT_CONFIG, buf, 4096)
+			stream := NewStream(ConfigOfDefault, buf, 4096)
 			stream.WriteVal(val)
 			stream.Flush()
 			should.Nil(stream.Error)
@@ -141,7 +141,7 @@ func Test_write_float64(t *testing.T) {
 	}
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(DEFAULT_CONFIG, buf, 10)
+	stream := NewStream(ConfigOfDefault, buf, 10)
 	stream.WriteRaw("abcdefg")
 	stream.WriteFloat64Lossy(1.123456)
 	stream.Flush()
@@ -151,7 +151,7 @@ func Test_write_float64(t *testing.T) {

 func Test_read_float64_cursor(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, "[1.23456789\n,2,3]")
+	iter := ParseString(ConfigOfDefault, "[1.23456789\n,2,3]")
 	should.True(iter.ReadArray())
 	should.Equal(1.23456789, iter.Read())
 	should.True(iter.ReadArray())
@@ -174,7 +174,7 @@ func Test_read_float_scientific(t *testing.T) {
 func Benchmark_jsoniter_float(b *testing.B) {
 	b.ReportAllocs()
 	input := []byte(`1.1123,`)
-	iter := NewIterator(DEFAULT_CONFIG)
+	iter := NewIterator(ConfigOfDefault)
 	for n := 0; n < b.N; n++ {
 		iter.ResetBytes(input)
 		iter.ReadFloat64()
--- a/jsoniter_int_test.go
+++ b/jsoniter_int_test.go
@@ -13,7 +13,7 @@ import (

 func Test_read_uint64_invalid(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, ",")
+	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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	val := 1001
 	stream.WriteVal(&val)
 	stream.Flush()
@@ -433,7 +433,7 @@ func Test_json_number(t *testing.T) {
 }

 func Benchmark_jsoniter_encode_int(b *testing.B) {
-	stream := NewStream(DEFAULT_CONFIG, ioutil.Discard, 64)
+	stream := NewStream(ConfigOfDefault, ioutil.Discard, 64)
 	for n := 0; n < b.N; n++ {
 		stream.n = 0
 		stream.WriteUint64(0xffffffff)
@@ -447,7 +447,7 @@ func Benchmark_itoa(b *testing.B) {
 }

 func Benchmark_jsoniter_int(b *testing.B) {
-	iter := NewIterator(DEFAULT_CONFIG)
+	iter := NewIterator(ConfigOfDefault)
 	input := []byte(`100`)
 	for n := 0; n < b.N; n++ {
 		iter.ResetBytes(input)
--- a/jsoniter_interface_test.go
+++ b/jsoniter_interface_test.go
@@ -141,8 +141,8 @@ func Test_encode_object_contain_non_empty_interface(t *testing.T) {
 }

 func Test_nil_non_empty_interface(t *testing.T) {
-	DEFAULT_CONFIG.CleanEncoders()
-	DEFAULT_CONFIG.CleanDecoders()
+	ConfigOfDefault.CleanEncoders()
+	ConfigOfDefault.CleanDecoders()
 	type TestObject struct {
 		Field []MyInterface
 	}
--- a/jsoniter_io_test.go
+++ b/jsoniter_io_test.go
@@ -7,7 +7,7 @@ import (
 )

 func Test_read_by_one(t *testing.T) {
-	iter := Parse(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, bytes.NewBufferString("abc"), 2)
+	iter := Parse(ConfigOfDefault, bytes.NewBufferString("abc"), 2)
 	iter.readByte()
 	iter.readByte()
 	b := iter.readByte()
--- a/jsoniter_large_file_test.go
+++ b/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(DEFAULT_CONFIG, file, 4096)
+		iter := Parse(ConfigOfDefault, file, 4096)
 		count := 0
 		for iter.ReadArray() {
 			iter.Skip()
--- a/jsoniter_map_test.go
+++ b/jsoniter_map_test.go
@@ -9,7 +9,7 @@ import (

 func Test_read_map(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `{"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})
@@ -18,11 +18,11 @@ func Test_read_map(t *testing.T) {

 func Test_read_map_of_interface(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `{"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(DEFAULT_CONFIG, `{"hello": "world"}`)
+	iter = ParseString(ConfigOfDefault, `{"hello": "world"}`)
 	should.Equal(map[string]interface{}{"hello": "world"}, iter.Read())
 }

--- a/jsoniter_nested_test.go
+++ b/jsoniter_nested_test.go
@@ -15,7 +15,7 @@ type Level2 struct {
 }

 func Test_nested(t *testing.T) {
-	iter := ParseString(DEFAULT_CONFIG, `{"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(DEFAULT_CONFIG, `{"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 {
--- a/jsoniter_null_test.go
+++ b/jsoniter_null_test.go
@@ -9,11 +9,11 @@ import (

 func Test_read_null(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `null`)
+	iter := ParseString(ConfigOfDefault, `null`)
 	should.True(iter.ReadNil())
-	iter = ParseString(DEFAULT_CONFIG, `null`)
+	iter = ParseString(ConfigOfDefault, `null`)
 	should.Nil(iter.Read())
-	iter = ParseString(DEFAULT_CONFIG, `null`)
+	iter = ParseString(ConfigOfDefault, `null`)
 	any, err := UnmarshalAnyFromString(`null`)
 	should.Nil(err)
 	should.Equal(0, any.ToInt())
@@ -25,7 +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(DEFAULT_CONFIG, buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	stream.WriteNil()
 	stream.Flush()
 	should.Nil(stream.Error)
@@ -41,7 +41,7 @@ func Test_encode_null(t *testing.T) {

 func Test_decode_null_object(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `[null,"a"]`)
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	iter.ReadArray()
 	if iter.ReadObject() != "" {
 		t.FailNow()
@@ -59,7 +59,7 @@ func Test_decode_null_object(t *testing.T) {
 }

 func Test_decode_null_array(t *testing.T) {
-	iter := ParseString(DEFAULT_CONFIG, `[null,"a"]`)
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	iter.ReadArray()
 	if iter.ReadArray() != false {
 		t.FailNow()
@@ -72,7 +72,7 @@ func Test_decode_null_array(t *testing.T) {

 func Test_decode_null_string(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `[null,"a"]`)
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	should.True(iter.ReadArray())
 	should.Equal("", iter.ReadString())
 	should.True(iter.ReadArray())
@@ -80,7 +80,7 @@ func Test_decode_null_string(t *testing.T) {
 }

 func Test_decode_null_skip(t *testing.T) {
-	iter := ParseString(DEFAULT_CONFIG, `[null,"a"]`)
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
--- a/jsoniter_object_test.go
+++ b/jsoniter_object_test.go
@@ -9,10 +9,10 @@ import (

 func Test_empty_object(t *testing.T) {
 	should := require.New(t)
-	iter := ParseString(DEFAULT_CONFIG, `{}`)
+	iter := ParseString(ConfigOfDefault, `{}`)
 	field := iter.ReadObject()
 	should.Equal("", field)
-	iter = ParseString(DEFAULT_CONFIG, `{}`)
+	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(DEFAULT_CONFIG, `{"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(DEFAULT_CONFIG, `{"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(DEFAULT_CONFIG, `{ "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(DEFAULT_CONFIG, `{"field1": "1", "field2": 2}`)
+	iter = ParseString(ConfigOfDefault, `{"field1": "1", "field2": 2}`)
 	for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
 		switch field {
 		case "field1":
@@ -229,7 +229,7 @@ func Benchmark_jsoniter_object(b *testing.B) {
 		Field2 uint64
 	}
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(DEFAULT_CONFIG, `{"field1": "1", "field2": 2}`)
+		iter := ParseString(ConfigOfDefault, `{"field1": "1", "field2": 2}`)
 		obj := TestObj{}
 		for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
 			switch field {
--- a/jsoniter_reflect_native_test.go
+++ b/jsoniter_reflect_native_test.go
@@ -6,7 +6,7 @@ import (
 )

 func Test_reflect_str(t *testing.T) {
-	iter := ParseString(DEFAULT_CONFIG, `"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(DEFAULT_CONFIG, `"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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `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(DEFAULT_CONFIG, `1.23`)
+	iter := ParseString(ConfigOfDefault, `1.23`)
 	val := float64(0)
 	iter.ReadVal(&val)
 	if val != 1.23 {
@@ -144,7 +144,7 @@ func Test_reflect_float64(t *testing.T) {
 }

 func Test_reflect_bool(t *testing.T) {
-	iter := ParseString(DEFAULT_CONFIG, `true`)
+	iter := ParseString(ConfigOfDefault, `true`)
 	val := false
 	iter.ReadVal(&val)
 	if val != true {
--- a/jsoniter_reflect_test.go
+++ b/jsoniter_reflect_test.go
@@ -27,7 +27,7 @@ func Test_decode_nested(t *testing.T) {
 		Field1 string
 		Field2 string
 	}
-	iter := ParseString(DEFAULT_CONFIG, `[{"field1": "hello"}, null, {"field2": "world"}]`)
+	iter := ParseString(ConfigOfDefault, `[{"field1": "hello"}, null, {"field2": "world"}]`)
 	slice := []*StructOfString{}
 	iter.ReadVal(&slice)
 	if len(slice) != 3 {
@@ -49,12 +49,12 @@ func Test_decode_nested(t *testing.T) {
 }

 func Test_decode_base64(t *testing.T) {
-	iter := ParseString(DEFAULT_CONFIG, `"YWJj"`)
+	iter := ParseString(ConfigOfDefault, `"YWJj"`)
 	val := []byte{}
 	RegisterTypeDecoder("[]uint8", func(ptr unsafe.Pointer, iter *Iterator) {
 		*((*[]byte)(ptr)) = iter.ReadBase64()
 	})
-	defer DEFAULT_CONFIG.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(DEFAULT_CONFIG)
+	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(DEFAULT_CONFIG, `["hello", "world"]`)
+		iter := ParseString(ConfigOfDefault, `["hello", "world"]`)
 		array := make([]string, 0, 2)
 		for iter.ReadArray() {
 			array = append(array, iter.ReadString())
--- a/jsoniter_skip_test.go
+++ b/jsoniter_skip_test.go
@@ -6,7 +6,7 @@ import (
 )

 func Test_skip_number(t *testing.T) {
-	iter := ParseString(DEFAULT_CONFIG, `[-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(DEFAULT_CONFIG, `[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(DEFAULT_CONFIG, `[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(DEFAULT_CONFIG, `[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(DEFAULT_CONFIG, `[[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(DEFAULT_CONFIG, `[ [ ], "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(DEFAULT_CONFIG, `[ {"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(DEFAULT_CONFIG, input)
+		iter := ParseBytes(ConfigOfDefault, input)
 		for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
 			switch field {
 			case "code":
--- a/jsoniter_stream_test.go
+++ b/jsoniter_stream_test.go
@@ -7,7 +7,7 @@ import (

 func Test_writeByte_should_grow_buffer(t *testing.T) {
 	should := require.New(t)
-	stream := NewStream(DEFAULT_CONFIG, nil, 1)
+	stream := NewStream(ConfigOfDefault, nil, 1)
 	stream.writeByte('1')
 	should.Equal("1", string(stream.Buffer()))
 	should.Equal(1, len(stream.buf))
@@ -20,7 +20,7 @@ func Test_writeByte_should_grow_buffer(t *testing.T) {

 func Test_writeBytes_should_grow_buffer(t *testing.T) {
 	should := require.New(t)
-	stream := NewStream(DEFAULT_CONFIG, nil, 1)
+	stream := NewStream(ConfigOfDefault, nil, 1)
 	stream.Write([]byte{'1', '2'})
 	should.Equal("12", string(stream.Buffer()))
 	should.Equal(3, len(stream.buf))
@@ -38,7 +38,7 @@ func Test_writeIndention_should_grow_buffer(t *testing.T) {

 func Test_writeRaw_should_grow_buffer(t *testing.T) {
 	should := require.New(t)
-	stream := NewStream(DEFAULT_CONFIG, nil, 1)
+	stream := NewStream(ConfigOfDefault, nil, 1)
 	stream.WriteRaw("123")
 	should.Nil(stream.Error)
 	should.Equal("123", string(stream.Buffer()))
@@ -46,7 +46,7 @@ func Test_writeRaw_should_grow_buffer(t *testing.T) {

 func Test_writeString_should_grow_buffer(t *testing.T) {
 	should := require.New(t)
-	stream := NewStream(DEFAULT_CONFIG, nil, 0)
+	stream := NewStream(ConfigOfDefault, nil, 0)
 	stream.WriteString("123")
 	should.Nil(stream.Error)
 	should.Equal(`"123"`, string(stream.Buffer()))
--- a/jsoniter_string_test.go
+++ b/jsoniter_string_test.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"github.com/json-iterator/go/require"
 	"testing"
+	"unicode/utf8"
 )

 func Test_read_normal_string(t *testing.T) {
@@ -17,22 +18,22 @@ func Test_read_normal_string(t *testing.T) {
 	for input, output := range cases {
 		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, bytes.NewBufferString(input), 2)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
 			should.Equal(output, string(iter.ReadStringAsSlice()))
 		})
 	}
@@ -48,12 +49,12 @@ func Test_read_exotic_string(t *testing.T) {
 	for input, output := range cases {
 		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
 			should := require.New(t)
-			iter := ParseString(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, 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(DEFAULT_CONFIG, `"hello"`)
+	iter := ParseString(ConfigOfDefault, `"hello"`)
 	should.Equal("hello", iter.Read())
 }

@@ -98,7 +99,7 @@ func Test_write_string(t *testing.T) {
 func Test_write_val_string(t *testing.T) {
 	should := require.New(t)
 	buf := &bytes.Buffer{}
-	stream := NewStream(DEFAULT_CONFIG, buf, 4096)
+	stream := NewStream(ConfigOfDefault, buf, 4096)
 	stream.WriteVal("hello")
 	stream.Flush()
 	should.Nil(stream.Error)
@@ -112,25 +113,39 @@ func Test_decode_slash(t *testing.T) {
 	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 = Marshal(`>`)
-//	should.Nil(err)
-//	should.Equal(`"\u003e"`, string(output))
-//}
+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 Benchmark_jsoniter_unicode(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(DEFAULT_CONFIG, `"\ud83d\udc4a"`)
+		iter := ParseString(ConfigOfDefault, `"\ud83d\udc4a"`)
 		iter.ReadString()
 	}
 }

 func Benchmark_jsoniter_ascii(b *testing.B) {
-	iter := NewIterator(DEFAULT_CONFIG)
+	iter := NewIterator(ConfigOfDefault)
 	input := []byte(`"hello, world! hello, world!"`)
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
@@ -140,7 +155,7 @@ func Benchmark_jsoniter_ascii(b *testing.B) {
 }

 func Benchmark_jsoniter_string_as_bytes(b *testing.B) {
-	iter := ParseString(DEFAULT_CONFIG, `"hello, world!"`)
+	iter := ParseString(ConfigOfDefault, `"hello, world!"`)
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
 		iter.ResetBytes(iter.buf)