go/json-iterator
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Code Issues Releases Activity
b893a0359d
json-iterator/feature_stream_int.go
Tao Wen 102cd8748e fix write int
2017-01-21 23:22:38 +08:00

361 lines
8.1 KiB
Go
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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';
if i < 10 {
DIGITS[i] += 2 << 24
} else if i < 100 {
DIGITS[i] += 1 << 24
}
}
}
func writeFirstBuf(buf []byte, v uint32, n int) int {
start := v >> 24
if start == 0 {
buf[n] = byte(v >> 16)
n++
buf[n] = byte(v >> 8)
n++
} else if start == 1 {
buf[n] = byte(v >> 8)
n++
}
buf[n] = byte(v)
n++
return n
}
func writeBuf(buf []byte, v uint32, n int) {
buf[n] = byte(v >> 16)
buf[n + 1] = byte(v >> 8)
buf[n + 2] = byte(v)
}
func (stream *Stream) WriteUint8(val uint8) {
if stream.Available() < 3 {
stream.Flush()
}
stream.n = writeFirstBuf(stream.buf, DIGITS[val], stream.n)
}
func (stream *Stream) WriteInt8(nval int8) {
if stream.Available() < 4 {
stream.Flush()
}
n := stream.n
var val uint8
if (nval < 0) {
val = uint8(-nval)
stream.buf[n] = '-'
n++
} else {
val = uint8(nval)
}
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
}
func (stream *Stream) WriteUint16(val uint16) {
if stream.Available() < 5 {
stream.Flush()
}
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], stream.n)
return
}
r1 := val - q1 * 1000;
n := writeFirstBuf(stream.buf, DIGITS[q1], stream.n)
writeBuf(stream.buf, DIGITS[r1], n)
stream.n = n + 3
return
}
func (stream *Stream) WriteInt16(nval int16) {
if stream.Available() < 6 {
stream.Flush()
}
n := stream.n
var val uint16
if (nval < 0) {
val = uint16(-nval)
stream.buf[n] = '-'
n++
} else {
val = uint16(nval)
}
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
r1 := val - q1 * 1000;
n = writeFirstBuf(stream.buf, DIGITS[q1], n)
writeBuf(stream.buf, DIGITS[r1], n)
stream.n = n + 3
return
}
func (stream *Stream) WriteUint32(val uint32) {
if stream.Available() < 10 {
stream.Flush()
}
n := stream.n
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
r1 := val - q1 * 1000;
q2 := q1 / 1000
if q2 == 0 {
n := writeFirstBuf(stream.buf, DIGITS[q1], n)
writeBuf(stream.buf, DIGITS[r1], n)
stream.n = n + 3
return
}
r2 := q1 - q2 * 1000
q3 := q2 / 1000
if q3 == 0 {
n = writeFirstBuf(stream.buf, DIGITS[q2], n)
} else {
r3 := q2 - q3 * 1000
stream.buf[n] = byte(q3 + '0')
n++
writeBuf(stream.buf, DIGITS[r3], n)
n += 3
}
writeBuf(stream.buf, DIGITS[r2], n)
writeBuf(stream.buf, DIGITS[r1], n + 3)
stream.n = n + 6
}
func (stream *Stream) WriteInt32(nval int32) {
if stream.Available() < 11 {
stream.Flush()
}
n := stream.n
var val uint32
if (nval < 0) {
val = uint32(-nval)
stream.buf[n] = '-'
n++
} else {
val = uint32(nval)
}
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
r1 := val - q1 * 1000;
q2 := q1 / 1000
if q2 == 0 {
n := writeFirstBuf(stream.buf, DIGITS[q1], n)
writeBuf(stream.buf, DIGITS[r1], n)
stream.n = n + 3
return
}
r2 := q1 - q2 * 1000
q3 := q2 / 1000
if q3 == 0 {
n = writeFirstBuf(stream.buf, DIGITS[q2], n)
} else {
r3 := q2 - q3 * 1000
stream.buf[n] = byte(q3 + '0')
n++
writeBuf(stream.buf, DIGITS[r3], n)
n += 3
}
writeBuf(stream.buf, DIGITS[r2], n)
writeBuf(stream.buf, DIGITS[r1], n + 3)
stream.n = n + 6
}
func (stream *Stream) WriteUint64(val uint64) {
if stream.Available() < 20 {
stream.Flush()
}
n := stream.n
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
r1 := val - q1 * 1000;
q2 := q1 / 1000
if q2 == 0 {
n := writeFirstBuf(stream.buf, DIGITS[q1], n)
writeBuf(stream.buf, DIGITS[r1], n)
stream.n = n + 3
return
}
r2 := q1 - q2 * 1000
q3 := q2 / 1000
if q3 == 0 {
n = writeFirstBuf(stream.buf, DIGITS[q2], n)
writeBuf(stream.buf, DIGITS[r2], n)
writeBuf(stream.buf, DIGITS[r1], n + 3)
stream.n = n + 6
return
}
r3 := q2 - q3 * 1000
q4 := q3 / 1000
if q4 == 0 {
n = writeFirstBuf(stream.buf, DIGITS[q3], n)
writeBuf(stream.buf, DIGITS[r3], n)
writeBuf(stream.buf, DIGITS[r2], n + 3)
writeBuf(stream.buf, DIGITS[r1], n + 6)
stream.n = n + 9
return
}
r4 := q3 - q4 * 1000
q5 := q4 / 1000
if q5 == 0 {
n = writeFirstBuf(stream.buf, DIGITS[q4], n)
writeBuf(stream.buf, DIGITS[r4], n)
writeBuf(stream.buf, DIGITS[r3], n + 3)
writeBuf(stream.buf, DIGITS[r2], n + 6)
writeBuf(stream.buf, DIGITS[r1], n + 9)
stream.n = n + 12
return
}
r5 := q4 - q5 * 1000
q6 := q5 / 1000
if q6 == 0 {
n = writeFirstBuf(stream.buf, DIGITS[q5], n)
} else {
n = writeFirstBuf(stream.buf, DIGITS[q6], n)
r6 := q5 - q6 * 1000
writeBuf(stream.buf, DIGITS[r6], n)
n += 3
}
writeBuf(stream.buf, DIGITS[r5], n)
writeBuf(stream.buf, DIGITS[r4], n + 3)
writeBuf(stream.buf, DIGITS[r3], n + 6)
writeBuf(stream.buf, DIGITS[r2], n + 9)
writeBuf(stream.buf, DIGITS[r1], n + 12)
stream.n = n + 15
}
func (stream *Stream) WriteInt64(nval int64) {
if stream.Available() < 20 {
stream.Flush()
}
n := stream.n
var val uint64
if (nval < 0) {
val = uint64(-nval)
stream.buf[n] = '-'
n++
} else {
val = uint64(nval)
}
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
r1 := val - q1 * 1000;
q2 := q1 / 1000
if q2 == 0 {
n := writeFirstBuf(stream.buf, DIGITS[q1], n)
writeBuf(stream.buf, DIGITS[r1], n)
stream.n = n + 3
return
}
r2 := q1 - q2 * 1000
q3 := q2 / 1000
if q3 == 0 {
n = writeFirstBuf(stream.buf, DIGITS[q2], n)
writeBuf(stream.buf, DIGITS[r2], n)
writeBuf(stream.buf, DIGITS[r1], n + 3)
stream.n = n + 6
return
}
r3 := q2 - q3 * 1000
q4 := q3 / 1000
if q4 == 0 {
n = writeFirstBuf(stream.buf, DIGITS[q3], n)
writeBuf(stream.buf, DIGITS[r3], n)
writeBuf(stream.buf, DIGITS[r2], n + 3)
writeBuf(stream.buf, DIGITS[r1], n + 6)
stream.n = n + 9
return
}
r4 := q3 - q4 * 1000
q5 := q4 / 1000
if q5 == 0 {
n = writeFirstBuf(stream.buf, DIGITS[q4], n)
writeBuf(stream.buf, DIGITS[r4], n)
writeBuf(stream.buf, DIGITS[r3], n + 3)
writeBuf(stream.buf, DIGITS[r2], n + 6)
writeBuf(stream.buf, DIGITS[r1], n + 9)
stream.n = n + 12
return
}
r5 := q4 - q5 * 1000
q6 := q5 / 1000
if q6 == 0 {
n = writeFirstBuf(stream.buf, DIGITS[q5], n)
} else {
stream.buf[n] = byte(q6 + '0')
n++
r6 := q5 - q6 * 1000
writeBuf(stream.buf, DIGITS[r6], n)
n += 3
}
writeBuf(stream.buf, DIGITS[r5], n)
writeBuf(stream.buf, DIGITS[r4], n + 3)
writeBuf(stream.buf, DIGITS[r3], n + 6)
writeBuf(stream.buf, DIGITS[r2], n + 9)
writeBuf(stream.buf, DIGITS[r1], n + 12)
stream.n = n + 15
}
func (stream *Stream) WriteInt(val int) {
stream.WriteInt64(int64(val))
}
func (stream *Stream) WriteUint(val uint) {
stream.WriteUint64(uint64(val))
}
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