stream_int.go raw
1 package jsoniter
2
3 var digits []uint32
4
5 func init() {
6 digits = make([]uint32, 1000)
7 for i := uint32(0); i < 1000; i++ {
8 digits[i] = (((i / 100) + '0') << 16) + ((((i / 10) % 10) + '0') << 8) + i%10 + '0'
9 if i < 10 {
10 digits[i] += 2 << 24
11 } else if i < 100 {
12 digits[i] += 1 << 24
13 }
14 }
15 }
16
17 func writeFirstBuf(space []byte, v uint32) []byte {
18 start := v >> 24
19 if start == 0 {
20 space = append(space, byte(v>>16), byte(v>>8))
21 } else if start == 1 {
22 space = append(space, byte(v>>8))
23 }
24 space = append(space, byte(v))
25 return space
26 }
27
28 func writeBuf(buf []byte, v uint32) []byte {
29 return append(buf, byte(v>>16), byte(v>>8), byte(v))
30 }
31
32 // WriteUint8 write uint8 to stream
33 func (stream *Stream) WriteUint8(val uint8) {
34 stream.buf = writeFirstBuf(stream.buf, digits[val])
35 }
36
37 // WriteInt8 write int8 to stream
38 func (stream *Stream) WriteInt8(nval int8) {
39 var val uint8
40 if nval < 0 {
41 val = uint8(-nval)
42 stream.buf = append(stream.buf, '-')
43 } else {
44 val = uint8(nval)
45 }
46 stream.buf = writeFirstBuf(stream.buf, digits[val])
47 }
48
49 // WriteUint16 write uint16 to stream
50 func (stream *Stream) WriteUint16(val uint16) {
51 q1 := val / 1000
52 if q1 == 0 {
53 stream.buf = writeFirstBuf(stream.buf, digits[val])
54 return
55 }
56 r1 := val - q1*1000
57 stream.buf = writeFirstBuf(stream.buf, digits[q1])
58 stream.buf = writeBuf(stream.buf, digits[r1])
59 return
60 }
61
62 // WriteInt16 write int16 to stream
63 func (stream *Stream) WriteInt16(nval int16) {
64 var val uint16
65 if nval < 0 {
66 val = uint16(-nval)
67 stream.buf = append(stream.buf, '-')
68 } else {
69 val = uint16(nval)
70 }
71 stream.WriteUint16(val)
72 }
73
74 // WriteUint32 write uint32 to stream
75 func (stream *Stream) WriteUint32(val uint32) {
76 q1 := val / 1000
77 if q1 == 0 {
78 stream.buf = writeFirstBuf(stream.buf, digits[val])
79 return
80 }
81 r1 := val - q1*1000
82 q2 := q1 / 1000
83 if q2 == 0 {
84 stream.buf = writeFirstBuf(stream.buf, digits[q1])
85 stream.buf = writeBuf(stream.buf, digits[r1])
86 return
87 }
88 r2 := q1 - q2*1000
89 q3 := q2 / 1000
90 if q3 == 0 {
91 stream.buf = writeFirstBuf(stream.buf, digits[q2])
92 } else {
93 r3 := q2 - q3*1000
94 stream.buf = append(stream.buf, byte(q3+'0'))
95 stream.buf = writeBuf(stream.buf, digits[r3])
96 }
97 stream.buf = writeBuf(stream.buf, digits[r2])
98 stream.buf = writeBuf(stream.buf, digits[r1])
99 }
100
101 // WriteInt32 write int32 to stream
102 func (stream *Stream) WriteInt32(nval int32) {
103 var val uint32
104 if nval < 0 {
105 val = uint32(-nval)
106 stream.buf = append(stream.buf, '-')
107 } else {
108 val = uint32(nval)
109 }
110 stream.WriteUint32(val)
111 }
112
113 // WriteUint64 write uint64 to stream
114 func (stream *Stream) WriteUint64(val uint64) {
115 q1 := val / 1000
116 if q1 == 0 {
117 stream.buf = writeFirstBuf(stream.buf, digits[val])
118 return
119 }
120 r1 := val - q1*1000
121 q2 := q1 / 1000
122 if q2 == 0 {
123 stream.buf = writeFirstBuf(stream.buf, digits[q1])
124 stream.buf = writeBuf(stream.buf, digits[r1])
125 return
126 }
127 r2 := q1 - q2*1000
128 q3 := q2 / 1000
129 if q3 == 0 {
130 stream.buf = writeFirstBuf(stream.buf, digits[q2])
131 stream.buf = writeBuf(stream.buf, digits[r2])
132 stream.buf = writeBuf(stream.buf, digits[r1])
133 return
134 }
135 r3 := q2 - q3*1000
136 q4 := q3 / 1000
137 if q4 == 0 {
138 stream.buf = writeFirstBuf(stream.buf, digits[q3])
139 stream.buf = writeBuf(stream.buf, digits[r3])
140 stream.buf = writeBuf(stream.buf, digits[r2])
141 stream.buf = writeBuf(stream.buf, digits[r1])
142 return
143 }
144 r4 := q3 - q4*1000
145 q5 := q4 / 1000
146 if q5 == 0 {
147 stream.buf = writeFirstBuf(stream.buf, digits[q4])
148 stream.buf = writeBuf(stream.buf, digits[r4])
149 stream.buf = writeBuf(stream.buf, digits[r3])
150 stream.buf = writeBuf(stream.buf, digits[r2])
151 stream.buf = writeBuf(stream.buf, digits[r1])
152 return
153 }
154 r5 := q4 - q5*1000
155 q6 := q5 / 1000
156 if q6 == 0 {
157 stream.buf = writeFirstBuf(stream.buf, digits[q5])
158 } else {
159 stream.buf = writeFirstBuf(stream.buf, digits[q6])
160 r6 := q5 - q6*1000
161 stream.buf = writeBuf(stream.buf, digits[r6])
162 }
163 stream.buf = writeBuf(stream.buf, digits[r5])
164 stream.buf = writeBuf(stream.buf, digits[r4])
165 stream.buf = writeBuf(stream.buf, digits[r3])
166 stream.buf = writeBuf(stream.buf, digits[r2])
167 stream.buf = writeBuf(stream.buf, digits[r1])
168 }
169
170 // WriteInt64 write int64 to stream
171 func (stream *Stream) WriteInt64(nval int64) {
172 var val uint64
173 if nval < 0 {
174 val = uint64(-nval)
175 stream.buf = append(stream.buf, '-')
176 } else {
177 val = uint64(nval)
178 }
179 stream.WriteUint64(val)
180 }
181
182 // WriteInt write int to stream
183 func (stream *Stream) WriteInt(val int) {
184 stream.WriteInt64(int64(val))
185 }
186
187 // WriteUint write uint to stream
188 func (stream *Stream) WriteUint(val uint) {
189 stream.WriteUint64(uint64(val))
190 }
191