go/json-iterator
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support []byte; marshal without copy

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This commit is contained in:
Tao Wen
2017-06-06 09:44:56 +08:00
parent 3979955e69
commit a4e5abf492
9 changed files with 225 additions and 140 deletions
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81
feature_stream_int.go
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@ -1,43 +1,8 @@
package jsoniter
var digits []uint8
var digitTens []uint8
var digitOnes []uint8
var DIGITS []uint32
func init() {
digits = []uint8{
'0', '1', '2', '3', '4', '5',
'6', '7', '8', '9', 'a', 'b',
'c', 'd', 'e', 'f', 'g', 'h',
'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't',
'u', 'v', 'w', 'x', 'y', 'z',
}
digitTens = []uint8{
'0', '0', '0', '0', '0', '0', '0', '0', '0', '0',
'1', '1', '1', '1', '1', '1', '1', '1', '1', '1',
'2', '2', '2', '2', '2', '2', '2', '2', '2', '2',
'3', '3', '3', '3', '3', '3', '3', '3', '3', '3',
'4', '4', '4', '4', '4', '4', '4', '4', '4', '4',
'5', '5', '5', '5', '5', '5', '5', '5', '5', '5',
'6', '6', '6', '6', '6', '6', '6', '6', '6', '6',
'7', '7', '7', '7', '7', '7', '7', '7', '7', '7',
'8', '8', '8', '8', '8', '8', '8', '8', '8', '8',
'9', '9', '9', '9', '9', '9', '9', '9', '9', '9',
}
digitOnes = []uint8{
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
}
DIGITS = make([]uint32, 1000)
for i := uint32(0); i < 1000; i++ {
DIGITS[i] = (((i / 100) + '0') << 16) + ((((i / 10) % 10) + '0') << 8) + i % 10 + '0';
@ -72,19 +37,15 @@ func writeBuf(buf []byte, v uint32, n int) {
}
func (stream *Stream) WriteUint8(val uint8) {
if stream.Available() < 3 {
stream.Flush()
}
stream.ensure(3)
stream.n = writeFirstBuf(stream.buf, DIGITS[val], stream.n)
}
func (stream *Stream) WriteInt8(nval int8) {
if stream.Available() < 4 {
stream.Flush()
}
stream.ensure(4)
n := stream.n
var val uint8
if (nval < 0) {
if nval < 0 {
val = uint8(-nval)
stream.buf[n] = '-'
n++
@ -95,15 +56,13 @@ func (stream *Stream) WriteInt8(nval int8) {
}
func (stream *Stream) WriteUint16(val uint16) {
if stream.Available() < 5 {
stream.Flush()
}
stream.ensure(5)
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], stream.n)
return
}
r1 := val - q1 * 1000;
r1 := val - q1 * 1000
n := writeFirstBuf(stream.buf, DIGITS[q1], stream.n)
writeBuf(stream.buf, DIGITS[r1], n)
stream.n = n + 3
@ -111,12 +70,10 @@ func (stream *Stream) WriteUint16(val uint16) {
}
func (stream *Stream) WriteInt16(nval int16) {
if stream.Available() < 6 {
stream.Flush()
}
stream.ensure(6)
n := stream.n
var val uint16
if (nval < 0) {
if nval < 0 {
val = uint16(-nval)
stream.buf[n] = '-'
n++
@ -128,7 +85,7 @@ func (stream *Stream) WriteInt16(nval int16) {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
r1 := val - q1 * 1000;
r1 := val - q1 * 1000
n = writeFirstBuf(stream.buf, DIGITS[q1], n)
writeBuf(stream.buf, DIGITS[r1], n)
stream.n = n + 3
@ -136,16 +93,14 @@ func (stream *Stream) WriteInt16(nval int16) {
}
func (stream *Stream) WriteUint32(val uint32) {
if stream.Available() < 10 {
stream.Flush()
}
stream.ensure(10)
n := stream.n
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
r1 := val - q1 * 1000;
r1 := val - q1 * 1000
q2 := q1 / 1000
if q2 == 0 {
n := writeFirstBuf(stream.buf, DIGITS[q1], n)
@ -170,9 +125,7 @@ func (stream *Stream) WriteUint32(val uint32) {
}
func (stream *Stream) WriteInt32(nval int32) {
if stream.Available() < 11 {
stream.Flush()
}
stream.ensure(11)
n := stream.n
var val uint32
if (nval < 0) {
@ -187,7 +140,7 @@ func (stream *Stream) WriteInt32(nval int32) {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
r1 := val - q1 * 1000;
r1 := val - q1 * 1000
q2 := q1 / 1000
if q2 == 0 {
n := writeFirstBuf(stream.buf, DIGITS[q1], n)
@ -212,16 +165,14 @@ func (stream *Stream) WriteInt32(nval int32) {
}
func (stream *Stream) WriteUint64(val uint64) {
if stream.Available() < 20 {
stream.Flush()
}
stream.ensure(20)
n := stream.n
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
r1 := val - q1 * 1000;
r1 := val - q1 * 1000
q2 := q1 / 1000
if q2 == 0 {
n := writeFirstBuf(stream.buf, DIGITS[q1], n)
@ -278,9 +229,7 @@ func (stream *Stream) WriteUint64(val uint64) {
}
func (stream *Stream) WriteInt64(nval int64) {
if stream.Available() < 20 {
stream.Flush()
}
stream.ensure(20)
n := stream.n
var val uint64
if (nval < 0) {