peridot/vendor/github.com/json-iterator/go/stream_int.go
2022-07-07 22:13:21 +02:00

191 lines
4.5 KiB
Go

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(space []byte, v uint32) []byte {
start := v >> 24
if start == 0 {
space = append(space, byte(v>>16), byte(v>>8))
} else if start == 1 {
space = append(space, byte(v>>8))
}
space = append(space, byte(v))
return space
}
func writeBuf(buf []byte, v uint32) []byte {
return append(buf, byte(v>>16), byte(v>>8), byte(v))
}
// WriteUint8 write uint8 to stream
func (stream *Stream) WriteUint8(val uint8) {
stream.buf = writeFirstBuf(stream.buf, digits[val])
}
// WriteInt8 write int8 to stream
func (stream *Stream) WriteInt8(nval int8) {
var val uint8
if nval < 0 {
val = uint8(-nval)
stream.buf = append(stream.buf, '-')
} else {
val = uint8(nval)
}
stream.buf = writeFirstBuf(stream.buf, digits[val])
}
// WriteUint16 write uint16 to stream
func (stream *Stream) WriteUint16(val uint16) {
q1 := val / 1000
if q1 == 0 {
stream.buf = writeFirstBuf(stream.buf, digits[val])
return
}
r1 := val - q1*1000
stream.buf = writeFirstBuf(stream.buf, digits[q1])
stream.buf = writeBuf(stream.buf, digits[r1])
return
}
// WriteInt16 write int16 to stream
func (stream *Stream) WriteInt16(nval int16) {
var val uint16
if nval < 0 {
val = uint16(-nval)
stream.buf = append(stream.buf, '-')
} else {
val = uint16(nval)
}
stream.WriteUint16(val)
}
// WriteUint32 write uint32 to stream
func (stream *Stream) WriteUint32(val uint32) {
q1 := val / 1000
if q1 == 0 {
stream.buf = writeFirstBuf(stream.buf, digits[val])
return
}
r1 := val - q1*1000
q2 := q1 / 1000
if q2 == 0 {
stream.buf = writeFirstBuf(stream.buf, digits[q1])
stream.buf = writeBuf(stream.buf, digits[r1])
return
}
r2 := q1 - q2*1000
q3 := q2 / 1000
if q3 == 0 {
stream.buf = writeFirstBuf(stream.buf, digits[q2])
} else {
r3 := q2 - q3*1000
stream.buf = append(stream.buf, byte(q3+'0'))
stream.buf = writeBuf(stream.buf, digits[r3])
}
stream.buf = writeBuf(stream.buf, digits[r2])
stream.buf = writeBuf(stream.buf, digits[r1])
}
// WriteInt32 write int32 to stream
func (stream *Stream) WriteInt32(nval int32) {
var val uint32
if nval < 0 {
val = uint32(-nval)
stream.buf = append(stream.buf, '-')
} else {
val = uint32(nval)
}
stream.WriteUint32(val)
}
// WriteUint64 write uint64 to stream
func (stream *Stream) WriteUint64(val uint64) {
q1 := val / 1000
if q1 == 0 {
stream.buf = writeFirstBuf(stream.buf, digits[val])
return
}
r1 := val - q1*1000
q2 := q1 / 1000
if q2 == 0 {
stream.buf = writeFirstBuf(stream.buf, digits[q1])
stream.buf = writeBuf(stream.buf, digits[r1])
return
}
r2 := q1 - q2*1000
q3 := q2 / 1000
if q3 == 0 {
stream.buf = writeFirstBuf(stream.buf, digits[q2])
stream.buf = writeBuf(stream.buf, digits[r2])
stream.buf = writeBuf(stream.buf, digits[r1])
return
}
r3 := q2 - q3*1000
q4 := q3 / 1000
if q4 == 0 {
stream.buf = writeFirstBuf(stream.buf, digits[q3])
stream.buf = writeBuf(stream.buf, digits[r3])
stream.buf = writeBuf(stream.buf, digits[r2])
stream.buf = writeBuf(stream.buf, digits[r1])
return
}
r4 := q3 - q4*1000
q5 := q4 / 1000
if q5 == 0 {
stream.buf = writeFirstBuf(stream.buf, digits[q4])
stream.buf = writeBuf(stream.buf, digits[r4])
stream.buf = writeBuf(stream.buf, digits[r3])
stream.buf = writeBuf(stream.buf, digits[r2])
stream.buf = writeBuf(stream.buf, digits[r1])
return
}
r5 := q4 - q5*1000
q6 := q5 / 1000
if q6 == 0 {
stream.buf = writeFirstBuf(stream.buf, digits[q5])
} else {
stream.buf = writeFirstBuf(stream.buf, digits[q6])
r6 := q5 - q6*1000
stream.buf = writeBuf(stream.buf, digits[r6])
}
stream.buf = writeBuf(stream.buf, digits[r5])
stream.buf = writeBuf(stream.buf, digits[r4])
stream.buf = writeBuf(stream.buf, digits[r3])
stream.buf = writeBuf(stream.buf, digits[r2])
stream.buf = writeBuf(stream.buf, digits[r1])
}
// WriteInt64 write int64 to stream
func (stream *Stream) WriteInt64(nval int64) {
var val uint64
if nval < 0 {
val = uint64(-nval)
stream.buf = append(stream.buf, '-')
} else {
val = uint64(nval)
}
stream.WriteUint64(val)
}
// WriteInt write int to stream
func (stream *Stream) WriteInt(val int) {
stream.WriteInt64(int64(val))
}
// WriteUint write uint to stream
func (stream *Stream) WriteUint(val uint) {
stream.WriteUint64(uint64(val))
}