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itoa.h
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1 // Tencent is pleased to support the open source community by making RapidJSON available.
2 //
3 // Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
4 //
5 // Licensed under the MIT License (the "License"); you may not use this file except
6 // in compliance with the License. You may obtain a copy of the License at
7 //
8 // http://opensource.org/licenses/MIT
9 //
10 // Unless required by applicable law or agreed to in writing, software distributed
11 // under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
12 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
13 // specific language governing permissions and limitations under the License.
14 
15 #ifndef RAPIDJSON_ITOA_
16 #define RAPIDJSON_ITOA_
17 
18 #include "../rapidjson.h"
19 
20 RAPIDJSON_NAMESPACE_BEGIN
21 namespace internal {
22 
23 inline const char* GetDigitsLut() {
24  static const char cDigitsLut[200] = {
25  '0','0','0','1','0','2','0','3','0','4','0','5','0','6','0','7','0','8','0','9',
26  '1','0','1','1','1','2','1','3','1','4','1','5','1','6','1','7','1','8','1','9',
27  '2','0','2','1','2','2','2','3','2','4','2','5','2','6','2','7','2','8','2','9',
28  '3','0','3','1','3','2','3','3','3','4','3','5','3','6','3','7','3','8','3','9',
29  '4','0','4','1','4','2','4','3','4','4','4','5','4','6','4','7','4','8','4','9',
30  '5','0','5','1','5','2','5','3','5','4','5','5','5','6','5','7','5','8','5','9',
31  '6','0','6','1','6','2','6','3','6','4','6','5','6','6','6','7','6','8','6','9',
32  '7','0','7','1','7','2','7','3','7','4','7','5','7','6','7','7','7','8','7','9',
33  '8','0','8','1','8','2','8','3','8','4','8','5','8','6','8','7','8','8','8','9',
34  '9','0','9','1','9','2','9','3','9','4','9','5','9','6','9','7','9','8','9','9'
35  };
36  return cDigitsLut;
37 }
38 
39 inline char* u32toa(uint32_t value, char* buffer) {
40  const char* cDigitsLut = GetDigitsLut();
41 
42  if (value < 10000) {
43  const uint32_t d1 = (value / 100) << 1;
44  const uint32_t d2 = (value % 100) << 1;
45 
46  if (value >= 1000)
47  *buffer++ = cDigitsLut[d1];
48  if (value >= 100)
49  *buffer++ = cDigitsLut[d1 + 1];
50  if (value >= 10)
51  *buffer++ = cDigitsLut[d2];
52  *buffer++ = cDigitsLut[d2 + 1];
53  }
54  else if (value < 100000000) {
55  // value = bbbbcccc
56  const uint32_t b = value / 10000;
57  const uint32_t c = value % 10000;
58 
59  const uint32_t d1 = (b / 100) << 1;
60  const uint32_t d2 = (b % 100) << 1;
61 
62  const uint32_t d3 = (c / 100) << 1;
63  const uint32_t d4 = (c % 100) << 1;
64 
65  if (value >= 10000000)
66  *buffer++ = cDigitsLut[d1];
67  if (value >= 1000000)
68  *buffer++ = cDigitsLut[d1 + 1];
69  if (value >= 100000)
70  *buffer++ = cDigitsLut[d2];
71  *buffer++ = cDigitsLut[d2 + 1];
72 
73  *buffer++ = cDigitsLut[d3];
74  *buffer++ = cDigitsLut[d3 + 1];
75  *buffer++ = cDigitsLut[d4];
76  *buffer++ = cDigitsLut[d4 + 1];
77  }
78  else {
79  // value = aabbbbcccc in decimal
80 
81  const uint32_t a = value / 100000000; // 1 to 42
82  value %= 100000000;
83 
84  if (a >= 10) {
85  const unsigned i = a << 1;
86  *buffer++ = cDigitsLut[i];
87  *buffer++ = cDigitsLut[i + 1];
88  }
89  else
90  *buffer++ = static_cast<char>('0' + static_cast<char>(a));
91 
92  const uint32_t b = value / 10000; // 0 to 9999
93  const uint32_t c = value % 10000; // 0 to 9999
94 
95  const uint32_t d1 = (b / 100) << 1;
96  const uint32_t d2 = (b % 100) << 1;
97 
98  const uint32_t d3 = (c / 100) << 1;
99  const uint32_t d4 = (c % 100) << 1;
100 
101  *buffer++ = cDigitsLut[d1];
102  *buffer++ = cDigitsLut[d1 + 1];
103  *buffer++ = cDigitsLut[d2];
104  *buffer++ = cDigitsLut[d2 + 1];
105  *buffer++ = cDigitsLut[d3];
106  *buffer++ = cDigitsLut[d3 + 1];
107  *buffer++ = cDigitsLut[d4];
108  *buffer++ = cDigitsLut[d4 + 1];
109  }
110  return buffer;
111 }
112 
113 inline char* i32toa(int32_t value, char* buffer) {
114  uint32_t u = static_cast<uint32_t>(value);
115  if (value < 0) {
116  *buffer++ = '-';
117  u = ~u + 1;
118  }
119 
120  return u32toa(u, buffer);
121 }
122 
123 inline char* u64toa(uint64_t value, char* buffer) {
124  const char* cDigitsLut = GetDigitsLut();
125  const uint64_t kTen8 = 100000000;
126  const uint64_t kTen9 = kTen8 * 10;
127  const uint64_t kTen10 = kTen8 * 100;
128  const uint64_t kTen11 = kTen8 * 1000;
129  const uint64_t kTen12 = kTen8 * 10000;
130  const uint64_t kTen13 = kTen8 * 100000;
131  const uint64_t kTen14 = kTen8 * 1000000;
132  const uint64_t kTen15 = kTen8 * 10000000;
133  const uint64_t kTen16 = kTen8 * kTen8;
134 
135  if (value < kTen8) {
136  uint32_t v = static_cast<uint32_t>(value);
137  if (v < 10000) {
138  const uint32_t d1 = (v / 100) << 1;
139  const uint32_t d2 = (v % 100) << 1;
140 
141  if (v >= 1000)
142  *buffer++ = cDigitsLut[d1];
143  if (v >= 100)
144  *buffer++ = cDigitsLut[d1 + 1];
145  if (v >= 10)
146  *buffer++ = cDigitsLut[d2];
147  *buffer++ = cDigitsLut[d2 + 1];
148  }
149  else {
150  // value = bbbbcccc
151  const uint32_t b = v / 10000;
152  const uint32_t c = v % 10000;
153 
154  const uint32_t d1 = (b / 100) << 1;
155  const uint32_t d2 = (b % 100) << 1;
156 
157  const uint32_t d3 = (c / 100) << 1;
158  const uint32_t d4 = (c % 100) << 1;
159 
160  if (value >= 10000000)
161  *buffer++ = cDigitsLut[d1];
162  if (value >= 1000000)
163  *buffer++ = cDigitsLut[d1 + 1];
164  if (value >= 100000)
165  *buffer++ = cDigitsLut[d2];
166  *buffer++ = cDigitsLut[d2 + 1];
167 
168  *buffer++ = cDigitsLut[d3];
169  *buffer++ = cDigitsLut[d3 + 1];
170  *buffer++ = cDigitsLut[d4];
171  *buffer++ = cDigitsLut[d4 + 1];
172  }
173  }
174  else if (value < kTen16) {
175  const uint32_t v0 = static_cast<uint32_t>(value / kTen8);
176  const uint32_t v1 = static_cast<uint32_t>(value % kTen8);
177 
178  const uint32_t b0 = v0 / 10000;
179  const uint32_t c0 = v0 % 10000;
180 
181  const uint32_t d1 = (b0 / 100) << 1;
182  const uint32_t d2 = (b0 % 100) << 1;
183 
184  const uint32_t d3 = (c0 / 100) << 1;
185  const uint32_t d4 = (c0 % 100) << 1;
186 
187  const uint32_t b1 = v1 / 10000;
188  const uint32_t c1 = v1 % 10000;
189 
190  const uint32_t d5 = (b1 / 100) << 1;
191  const uint32_t d6 = (b1 % 100) << 1;
192 
193  const uint32_t d7 = (c1 / 100) << 1;
194  const uint32_t d8 = (c1 % 100) << 1;
195 
196  if (value >= kTen15)
197  *buffer++ = cDigitsLut[d1];
198  if (value >= kTen14)
199  *buffer++ = cDigitsLut[d1 + 1];
200  if (value >= kTen13)
201  *buffer++ = cDigitsLut[d2];
202  if (value >= kTen12)
203  *buffer++ = cDigitsLut[d2 + 1];
204  if (value >= kTen11)
205  *buffer++ = cDigitsLut[d3];
206  if (value >= kTen10)
207  *buffer++ = cDigitsLut[d3 + 1];
208  if (value >= kTen9)
209  *buffer++ = cDigitsLut[d4];
210  if (value >= kTen8)
211  *buffer++ = cDigitsLut[d4 + 1];
212 
213  *buffer++ = cDigitsLut[d5];
214  *buffer++ = cDigitsLut[d5 + 1];
215  *buffer++ = cDigitsLut[d6];
216  *buffer++ = cDigitsLut[d6 + 1];
217  *buffer++ = cDigitsLut[d7];
218  *buffer++ = cDigitsLut[d7 + 1];
219  *buffer++ = cDigitsLut[d8];
220  *buffer++ = cDigitsLut[d8 + 1];
221  }
222  else {
223  const uint32_t a = static_cast<uint32_t>(value / kTen16); // 1 to 1844
224  value %= kTen16;
225 
226  if (a < 10)
227  *buffer++ = static_cast<char>('0' + static_cast<char>(a));
228  else if (a < 100) {
229  const uint32_t i = a << 1;
230  *buffer++ = cDigitsLut[i];
231  *buffer++ = cDigitsLut[i + 1];
232  }
233  else if (a < 1000) {
234  *buffer++ = static_cast<char>('0' + static_cast<char>(a / 100));
235 
236  const uint32_t i = (a % 100) << 1;
237  *buffer++ = cDigitsLut[i];
238  *buffer++ = cDigitsLut[i + 1];
239  }
240  else {
241  const uint32_t i = (a / 100) << 1;
242  const uint32_t j = (a % 100) << 1;
243  *buffer++ = cDigitsLut[i];
244  *buffer++ = cDigitsLut[i + 1];
245  *buffer++ = cDigitsLut[j];
246  *buffer++ = cDigitsLut[j + 1];
247  }
248 
249  const uint32_t v0 = static_cast<uint32_t>(value / kTen8);
250  const uint32_t v1 = static_cast<uint32_t>(value % kTen8);
251 
252  const uint32_t b0 = v0 / 10000;
253  const uint32_t c0 = v0 % 10000;
254 
255  const uint32_t d1 = (b0 / 100) << 1;
256  const uint32_t d2 = (b0 % 100) << 1;
257 
258  const uint32_t d3 = (c0 / 100) << 1;
259  const uint32_t d4 = (c0 % 100) << 1;
260 
261  const uint32_t b1 = v1 / 10000;
262  const uint32_t c1 = v1 % 10000;
263 
264  const uint32_t d5 = (b1 / 100) << 1;
265  const uint32_t d6 = (b1 % 100) << 1;
266 
267  const uint32_t d7 = (c1 / 100) << 1;
268  const uint32_t d8 = (c1 % 100) << 1;
269 
270  *buffer++ = cDigitsLut[d1];
271  *buffer++ = cDigitsLut[d1 + 1];
272  *buffer++ = cDigitsLut[d2];
273  *buffer++ = cDigitsLut[d2 + 1];
274  *buffer++ = cDigitsLut[d3];
275  *buffer++ = cDigitsLut[d3 + 1];
276  *buffer++ = cDigitsLut[d4];
277  *buffer++ = cDigitsLut[d4 + 1];
278  *buffer++ = cDigitsLut[d5];
279  *buffer++ = cDigitsLut[d5 + 1];
280  *buffer++ = cDigitsLut[d6];
281  *buffer++ = cDigitsLut[d6 + 1];
282  *buffer++ = cDigitsLut[d7];
283  *buffer++ = cDigitsLut[d7 + 1];
284  *buffer++ = cDigitsLut[d8];
285  *buffer++ = cDigitsLut[d8 + 1];
286  }
287 
288  return buffer;
289 }
290 
291 inline char* i64toa(int64_t value, char* buffer) {
292  uint64_t u = static_cast<uint64_t>(value);
293  if (value < 0) {
294  *buffer++ = '-';
295  u = ~u + 1;
296  }
297 
298  return u64toa(u, buffer);
299 }
300 
301 } // namespace internal
302 RAPIDJSON_NAMESPACE_END
303 
304 #endif // RAPIDJSON_ITOA_
buffer
GLuint buffer
Definition: glext.h:6555
internal::i64toa
char * i64toa(int64_t value, char *buffer)
Definition: itoa.h:291
internal::u64toa
char * u64toa(uint64_t value, char *buffer)
Definition: itoa.h:123
internal::u32toa
char * u32toa(uint32_t value, char *buffer)
Definition: itoa.h:39
RAPIDJSON_NAMESPACE_END
#define RAPIDJSON_NAMESPACE_END
provide custom rapidjson namespace (closing expression)
Definition: rapidjson.h:119
c
const GLubyte * c
Definition: glext.h:9812
b
GLboolean GLboolean GLboolean b
Definition: glext.h:6844
v0
GLfloat v0
Definition: glext.h:6701
internal
Definition: document.h:391
int32_t
signed int int32_t
Definition: stdint.h:123
v
const GLdouble * v
Definition: glext.h:6391
RAPIDJSON_NAMESPACE_BEGIN
#define RAPIDJSON_NAMESPACE_BEGIN
provide custom rapidjson namespace (opening expression)
Definition: rapidjson.h:116
j
GLint j
Definition: nx_glsym.h:307
int64_t
signed __int64 int64_t
Definition: stdint.h:135
internal::i32toa
char * i32toa(int32_t value, char *buffer)
Definition: itoa.h:113
internal::GetDigitsLut
const char * GetDigitsLut()
Definition: itoa.h:23
value
GLsizei const GLfloat * value
Definition: glext.h:6709
buffer
Definition: video4linux2.c:51
v1
GLfloat GLfloat v1
Definition: glext.h:6702
uint64_t
unsigned __int64 uint64_t
Definition: stdint.h:136
uint32_t
unsigned int uint32_t
Definition: stdint.h:126
a
GLboolean GLboolean GLboolean GLboolean a
Definition: glext.h:6844
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