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mirror of https://github.com/json-iterator/go.git synced 2025-04-11 11:12:03 +02:00

fix write int

This commit is contained in:
Tao Wen 2017-01-21 23:22:38 +08:00
parent 8345c731dd
commit 102cd8748e
2 changed files with 262 additions and 333 deletions

View File

@ -3,6 +3,7 @@ package jsoniter
var digits []uint8
var digitTens []uint8
var digitOnes []uint8
var DIGITS []uint32
func init() {
digits = []uint8{
@ -37,390 +38,318 @@ func init() {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
}
}
func (stream *Stream) WriteUint8(val uint8) {
if stream.Available() < 3 {
stream.Flush()
}
charPos := stream.n
if val <= 9 {
charPos += 1;
} else {
if val <= 99 {
charPos += 2;
} else {
charPos += 3;
}
}
stream.n = charPos
var q uint8
for {
q = val / 10
r := val - ((q << 3) + (q << 1)) // r = i-(q*10) ...
charPos--
stream.buf[charPos] = digits[r]
val = q;
if val == 0 {
break
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 (stream *Stream) WriteInt8(val int8) {
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()
}
charPos := stream.n
if (val < 0) {
charPos += 1
val = -val
stream.buf[stream.n] = '-'
}
if val <= 9 {
charPos += 1;
n := stream.n
var val uint8
if (nval < 0) {
val = uint8(-nval)
stream.buf[n] = '-'
n++
} else {
if val <= 99 {
charPos += 2;
} else {
charPos += 3;
}
}
stream.n = charPos
var q int8
for {
q = val / 10
r := val - ((q << 3) + (q << 1)) // r = i-(q*10) ...
charPos--
stream.buf[charPos] = digits[r]
val = q;
if val == 0 {
break
}
val = uint8(nval)
}
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
}
func (stream *Stream) WriteUint16(val uint16) {
if stream.Available() < 5 {
stream.Flush()
}
charPos := stream.n
if val <= 99 {
if val <= 9 {
charPos += 1;
} else {
charPos += 2;
}
} else {
if val <= 999 {
charPos += 3;
} else {
if val <= 9999 {
charPos += 4;
} else {
charPos += 5;
}
}
}
stream.n = charPos
var q uint16
for {
q = val / 10
r := val - ((q << 3) + (q << 1)) // r = i-(q*10) ...
charPos--
stream.buf[charPos] = digits[r]
val = q;
if val == 0 {
break
}
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(val int16) {
func (stream *Stream) WriteInt16(nval int16) {
if stream.Available() < 6 {
stream.Flush()
}
charPos := stream.n
if (val < 0) {
charPos += 1
val = -val
stream.buf[stream.n] = '-'
}
if val <= 99 {
if val <= 9 {
charPos += 1;
} else {
charPos += 2;
}
n := stream.n
var val uint16
if (nval < 0) {
val = uint16(-nval)
stream.buf[n] = '-'
n++
} else {
if val <= 999 {
charPos += 3;
} else {
if val <= 9999 {
charPos += 4;
} else {
charPos += 5;
}
}
val = uint16(nval)
}
stream.n = charPos
var q int16
for {
q = val / 10
r := val - ((q << 3) + (q << 1)) // r = i-(q*10) ...
charPos--
stream.buf[charPos] = digits[r]
val = q;
if val == 0 {
break
}
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()
}
charPos := stream.n
if val <= 99999 {
if val <= 999 {
if val <= 9 {
charPos += 1;
} else {
if val <= 99 {
charPos += 2;
} else {
charPos += 3;
}
}
} else {
if val <= 9999 {
charPos += 4;
} else {
charPos += 5;
}
}
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 {
if val < 99999999 {
if val <= 999999 {
charPos += 6;
} else {
if val <= 9999999 {
charPos += 7;
} else {
charPos += 8;
}
}
} else {
if val <= 999999999 {
charPos += 9;
} else {
charPos += 10;
}
}
}
stream.n = charPos
var q uint32
for val >= 65536 {
q = val / 100;
// really: r = i - (q * 100);
r := val - ((q << 6) + (q << 5) + (q << 2));
val = q;
charPos--
stream.buf[charPos] = digitOnes[r];
charPos--
stream.buf[charPos] = digitTens[r];
}
for {
q = val / 10
r := val - ((q << 3) + (q << 1)) // r = i-(q*10) ...
charPos--
stream.buf[charPos] = digits[r]
val = q;
if val == 0 {
break
}
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(val int32) {
func (stream *Stream) WriteInt32(nval int32) {
if stream.Available() < 11 {
stream.Flush()
}
charPos := stream.n
if (val < 0) {
charPos += 1
val = -val
stream.buf[stream.n] = '-'
}
if val <= 99999 {
if val <= 999 {
if val <= 9 {
charPos += 1;
} else {
if val <= 99 {
charPos += 2;
} else {
charPos += 3;
}
}
} else {
if val <= 9999 {
charPos += 4;
} else {
charPos += 5;
}
}
n := stream.n
var val uint32
if (nval < 0) {
val = uint32(-nval)
stream.buf[n] = '-'
n++
} else {
if val < 99999999 {
if val <= 999999 {
charPos += 6;
} else {
if val <= 9999999 {
charPos += 7;
} else {
charPos += 8;
}
}
} else {
if val <= 999999999 {
charPos += 9;
} else {
charPos += 10;
}
}
val = uint32(nval)
}
stream.n = charPos
var q int32
for val >= 65536 {
q = val / 100;
// really: r = i - (q * 100);
r := val - ((q << 6) + (q << 5) + (q << 2));
val = q;
charPos--
stream.buf[charPos] = digitOnes[r];
charPos--
stream.buf[charPos] = digitTens[r];
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
for {
q = val / 10
r := val - ((q << 3) + (q << 1)) // r = i-(q*10) ...
charPos--
stream.buf[charPos] = digits[r]
val = q;
if val == 0 {
break
}
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() < 10 {
if stream.Available() < 20 {
stream.Flush()
}
charPos := stream.n
if val <= 99999 {
if val <= 999 {
if val <= 9 {
charPos += 1;
} else {
if val <= 99 {
charPos += 2;
} else {
charPos += 3;
}
}
} else {
if val <= 9999 {
charPos += 4;
} else {
charPos += 5;
}
}
} else if val < 9999999999 {
if val < 99999999 {
if val <= 999999 {
charPos += 6;
} else {
if val <= 9999999 {
charPos += 7;
} else {
charPos += 8;
}
}
} else {
if val <= 999999999 {
charPos += 9;
} else {
charPos += 10;
}
}
} else {
stream.writeUint64SlowPath(val)
n := stream.n
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
stream.n = charPos
var q uint64
for val >= 65536 {
q = val / 100;
// really: r = i - (q * 100);
r := val - ((q << 6) + (q << 5) + (q << 2));
val = q;
charPos--
stream.buf[charPos] = digitOnes[r];
charPos--
stream.buf[charPos] = digitTens[r];
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
}
for {
q = val / 10
r := val - ((q << 3) + (q << 1)) // r = i-(q*10) ...
charPos--
stream.buf[charPos] = digits[r]
val = q;
if val == 0 {
break
}
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(val int64) {
if (val < 0) {
val = -val
stream.writeByte('-')
func (stream *Stream) WriteInt64(nval int64) {
if stream.Available() < 20 {
stream.Flush()
}
stream.WriteUint64(uint64(val))
}
func (stream *Stream) writeUint64SlowPath(val uint64) {
var temp [20]byte
charPos := 20
var q uint64
for val >= 65536 {
q = val / 100;
// really: r = i - (q * 100);
r := val - ((q << 6) + (q << 5) + (q << 2));
val = q;
charPos--
temp[charPos] = digitOnes[r];
charPos--
temp[charPos] = digitTens[r];
n := stream.n
var val uint64
if (nval < 0) {
val = uint64(-nval)
stream.buf[n] = '-'
n++
} else {
val = uint64(nval)
}
for {
q = val / 10
r := val - ((q << 3) + (q << 1)) // r = i-(q*10) ...
charPos--
temp[charPos] = digits[r]
val = q;
if val == 0 {
break
}
q1 := val / 1000
if q1 == 0 {
stream.n = writeFirstBuf(stream.buf, DIGITS[val], n)
return
}
stream.Write(temp[charPos:])
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) {

View File

@ -132,7 +132,7 @@ func Test_write_uint8(t *testing.T) {
}
func Test_write_int8(t *testing.T) {
vals := []int8{0, 1, -1, 99, 0x7f, -0x7f}
vals := []int8{0, 1, -1, 99, 0x7f, -0x80}
for _, val := range vals {
t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
should := require.New(t)
@ -196,7 +196,7 @@ func Test_write_uint16(t *testing.T) {
}
func Test_write_int16(t *testing.T) {
vals := []int16{0, 1, 11, 111, 255, 0xfff, 0x7fff, -0x7fff}
vals := []int16{0, 1, 11, 111, 255, 0xfff, 0x7fff, -0x8000}
for _, val := range vals {
t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
should := require.New(t)
@ -260,7 +260,7 @@ func Test_write_uint32(t *testing.T) {
}
func Test_write_int32(t *testing.T) {
vals := []int32{0, 1, 11, 111, 255, 999999, 0xfff, 0xffff, 0xfffff, 0xffffff, 0xfffffff, 0x7fffffff, -0x7fffffff}
vals := []int32{0, 1, 11, 111, 255, 999999, 0xfff, 0xffff, 0xfffff, 0xffffff, 0xfffffff, 0x7fffffff, -0x80000000}
for _, val := range vals {
t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
should := require.New(t)
@ -328,7 +328,7 @@ func Test_write_uint64(t *testing.T) {
func Test_write_int64(t *testing.T) {
vals := []int64{0, 1, 11, 111, 255, 999999, 0xfff, 0xffff, 0xfffff, 0xffffff, 0xfffffff, 0xffffffff,
0xfffffffff, 0xffffffffff, 0xfffffffffff, 0xffffffffffff, 0xfffffffffffff, 0xffffffffffffff,
0xfffffffffffffff, 0x7fffffffffffffff, -0x7fffffffffffffff}
0xfffffffffffffff, 0x7fffffffffffffff, -0x8000000000000000}
for _, val := range vals {
t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
should := require.New(t)