forked from json-iterator/go
/
feature_stream_int.go
310 lines (296 loc) · 6.47 KB
/
feature_stream_int.go
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package jsoniter
var _DIGITS []uint32
func init() {
_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) {
stream.ensure(3)
stream.n = writeFirstBuf(stream.buf, _DIGITS[val], stream.n)
}
func (stream *Stream) WriteInt8(nval int8) {
stream.ensure(4)
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) {
stream.ensure(5)
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) {
stream.ensure(6)
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) {
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
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) {
stream.ensure(11)
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) {
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
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) {
stream.ensure(20)
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))
}