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1 | /* SDSLib, A C dynamic strings library |
2 | * |
12d090d2 |
3 | * Copyright (c) 2006-2010, Salvatore Sanfilippo <antirez at gmail dot com> |
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4 | * All rights reserved. |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions are met: |
8 | * |
9 | * * Redistributions of source code must retain the above copyright notice, |
10 | * this list of conditions and the following disclaimer. |
11 | * * Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
14 | * * Neither the name of Redis nor the names of its contributors may be used |
15 | * to endorse or promote products derived from this software without |
16 | * specific prior written permission. |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
28 | * POSSIBILITY OF SUCH DAMAGE. |
29 | */ |
30 | |
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31 | #define SDS_ABORT_ON_OOM |
32 | |
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33 | #include "sds.h" |
34 | #include <stdio.h> |
35 | #include <stdlib.h> |
36 | #include <stdarg.h> |
37 | #include <string.h> |
38 | #include <ctype.h> |
39 | #include "zmalloc.h" |
40 | |
41 | static void sdsOomAbort(void) { |
42 | fprintf(stderr,"SDS: Out Of Memory (SDS_ABORT_ON_OOM defined)\n"); |
43 | abort(); |
44 | } |
45 | |
46 | sds sdsnewlen(const void *init, size_t initlen) { |
47 | struct sdshdr *sh; |
48 | |
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49 | sh = zmalloc(sizeof(struct sdshdr)+initlen+1); |
50 | #ifdef SDS_ABORT_ON_OOM |
51 | if (sh == NULL) sdsOomAbort(); |
52 | #else |
53 | if (sh == NULL) return NULL; |
54 | #endif |
55 | sh->len = initlen; |
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56 | sh->free = 0; |
57 | if (initlen) { |
58 | if (init) memcpy(sh->buf, init, initlen); |
59 | else memset(sh->buf,0,initlen); |
60 | } |
61 | sh->buf[initlen] = '\0'; |
62 | return (char*)sh->buf; |
63 | } |
64 | |
65 | sds sdsempty(void) { |
66 | return sdsnewlen("",0); |
67 | } |
68 | |
69 | sds sdsnew(const char *init) { |
70 | size_t initlen = (init == NULL) ? 0 : strlen(init); |
71 | return sdsnewlen(init, initlen); |
72 | } |
73 | |
74 | size_t sdslen(const sds s) { |
75 | struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr))); |
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76 | return sh->len; |
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77 | } |
78 | |
79 | sds sdsdup(const sds s) { |
80 | return sdsnewlen(s, sdslen(s)); |
81 | } |
82 | |
83 | void sdsfree(sds s) { |
84 | if (s == NULL) return; |
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85 | zfree(s-sizeof(struct sdshdr)); |
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86 | } |
87 | |
88 | size_t sdsavail(sds s) { |
89 | struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr))); |
90 | return sh->free; |
91 | } |
92 | |
93 | void sdsupdatelen(sds s) { |
94 | struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr))); |
95 | int reallen = strlen(s); |
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96 | sh->free += (sh->len-reallen); |
97 | sh->len = reallen; |
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98 | } |
99 | |
100 | static sds sdsMakeRoomFor(sds s, size_t addlen) { |
101 | struct sdshdr *sh, *newsh; |
102 | size_t free = sdsavail(s); |
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103 | size_t len, newlen; |
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104 | |
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105 | if (free >= addlen) return s; |
ed9b544e |
106 | len = sdslen(s); |
107 | sh = (void*) (s-(sizeof(struct sdshdr))); |
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108 | newlen = (len+addlen)*2; |
109 | newsh = zrealloc(sh, sizeof(struct sdshdr)+newlen+1); |
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110 | #ifdef SDS_ABORT_ON_OOM |
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111 | if (newsh == NULL) sdsOomAbort(); |
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112 | #else |
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113 | if (newsh == NULL) return NULL; |
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114 | #endif |
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115 | |
116 | newsh->free = newlen - len; |
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117 | return newsh->buf; |
118 | } |
119 | |
120 | sds sdscatlen(sds s, void *t, size_t len) { |
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121 | struct sdshdr *sh; |
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122 | size_t curlen = sdslen(s); |
123 | |
124 | s = sdsMakeRoomFor(s,len); |
125 | if (s == NULL) return NULL; |
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126 | sh = (void*) (s-(sizeof(struct sdshdr))); |
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127 | memcpy(s+curlen, t, len); |
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128 | sh->len = curlen+len; |
129 | sh->free = sh->free-len; |
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130 | s[curlen+len] = '\0'; |
131 | return s; |
132 | } |
133 | |
134 | sds sdscat(sds s, char *t) { |
135 | return sdscatlen(s, t, strlen(t)); |
136 | } |
137 | |
138 | sds sdscpylen(sds s, char *t, size_t len) { |
139 | struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr))); |
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140 | size_t totlen = sh->free+sh->len; |
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141 | |
142 | if (totlen < len) { |
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143 | s = sdsMakeRoomFor(s,len-sh->len); |
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144 | if (s == NULL) return NULL; |
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145 | sh = (void*) (s-(sizeof(struct sdshdr))); |
146 | totlen = sh->free+sh->len; |
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147 | } |
148 | memcpy(s, t, len); |
149 | s[len] = '\0'; |
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150 | sh->len = len; |
151 | sh->free = totlen-len; |
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152 | return s; |
153 | } |
154 | |
155 | sds sdscpy(sds s, char *t) { |
156 | return sdscpylen(s, t, strlen(t)); |
157 | } |
158 | |
159 | sds sdscatprintf(sds s, const char *fmt, ...) { |
160 | va_list ap; |
161 | char *buf, *t; |
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162 | size_t buflen = 16; |
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163 | |
164 | while(1) { |
165 | buf = zmalloc(buflen); |
166 | #ifdef SDS_ABORT_ON_OOM |
167 | if (buf == NULL) sdsOomAbort(); |
168 | #else |
169 | if (buf == NULL) return NULL; |
170 | #endif |
171 | buf[buflen-2] = '\0'; |
172 | va_start(ap, fmt); |
173 | vsnprintf(buf, buflen, fmt, ap); |
174 | va_end(ap); |
175 | if (buf[buflen-2] != '\0') { |
176 | zfree(buf); |
177 | buflen *= 2; |
178 | continue; |
179 | } |
180 | break; |
181 | } |
182 | t = sdscat(s, buf); |
183 | zfree(buf); |
184 | return t; |
185 | } |
186 | |
187 | sds sdstrim(sds s, const char *cset) { |
188 | struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr))); |
189 | char *start, *end, *sp, *ep; |
190 | size_t len; |
191 | |
192 | sp = start = s; |
193 | ep = end = s+sdslen(s)-1; |
194 | while(sp <= end && strchr(cset, *sp)) sp++; |
195 | while(ep > start && strchr(cset, *ep)) ep--; |
196 | len = (sp > ep) ? 0 : ((ep-sp)+1); |
197 | if (sh->buf != sp) memmove(sh->buf, sp, len); |
198 | sh->buf[len] = '\0'; |
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199 | sh->free = sh->free+(sh->len-len); |
200 | sh->len = len; |
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201 | return s; |
202 | } |
203 | |
204 | sds sdsrange(sds s, long start, long end) { |
205 | struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr))); |
206 | size_t newlen, len = sdslen(s); |
207 | |
208 | if (len == 0) return s; |
209 | if (start < 0) { |
210 | start = len+start; |
211 | if (start < 0) start = 0; |
212 | } |
213 | if (end < 0) { |
214 | end = len+end; |
215 | if (end < 0) end = 0; |
216 | } |
217 | newlen = (start > end) ? 0 : (end-start)+1; |
218 | if (newlen != 0) { |
219 | if (start >= (signed)len) start = len-1; |
220 | if (end >= (signed)len) end = len-1; |
221 | newlen = (start > end) ? 0 : (end-start)+1; |
222 | } else { |
223 | start = 0; |
224 | } |
225 | if (start != 0) memmove(sh->buf, sh->buf+start, newlen); |
226 | sh->buf[newlen] = 0; |
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227 | sh->free = sh->free+(sh->len-newlen); |
228 | sh->len = newlen; |
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229 | return s; |
230 | } |
231 | |
232 | void sdstolower(sds s) { |
233 | int len = sdslen(s), j; |
234 | |
235 | for (j = 0; j < len; j++) s[j] = tolower(s[j]); |
236 | } |
237 | |
238 | void sdstoupper(sds s) { |
239 | int len = sdslen(s), j; |
240 | |
241 | for (j = 0; j < len; j++) s[j] = toupper(s[j]); |
242 | } |
243 | |
244 | int sdscmp(sds s1, sds s2) { |
245 | size_t l1, l2, minlen; |
246 | int cmp; |
247 | |
248 | l1 = sdslen(s1); |
249 | l2 = sdslen(s2); |
250 | minlen = (l1 < l2) ? l1 : l2; |
251 | cmp = memcmp(s1,s2,minlen); |
252 | if (cmp == 0) return l1-l2; |
253 | return cmp; |
254 | } |
255 | |
256 | /* Split 's' with separator in 'sep'. An array |
257 | * of sds strings is returned. *count will be set |
258 | * by reference to the number of tokens returned. |
259 | * |
260 | * On out of memory, zero length string, zero length |
261 | * separator, NULL is returned. |
262 | * |
263 | * Note that 'sep' is able to split a string using |
264 | * a multi-character separator. For example |
265 | * sdssplit("foo_-_bar","_-_"); will return two |
266 | * elements "foo" and "bar". |
267 | * |
268 | * This version of the function is binary-safe but |
269 | * requires length arguments. sdssplit() is just the |
270 | * same function but for zero-terminated strings. |
271 | */ |
272 | sds *sdssplitlen(char *s, int len, char *sep, int seplen, int *count) { |
273 | int elements = 0, slots = 5, start = 0, j; |
274 | |
275 | sds *tokens = zmalloc(sizeof(sds)*slots); |
276 | #ifdef SDS_ABORT_ON_OOM |
277 | if (tokens == NULL) sdsOomAbort(); |
278 | #endif |
279 | if (seplen < 1 || len < 0 || tokens == NULL) return NULL; |
ed10f40b |
280 | if (len == 0) { |
281 | *count = 0; |
282 | return tokens; |
283 | } |
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284 | for (j = 0; j < (len-(seplen-1)); j++) { |
285 | /* make sure there is room for the next element and the final one */ |
286 | if (slots < elements+2) { |
a4d1ba9a |
287 | sds *newtokens; |
288 | |
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289 | slots *= 2; |
a4d1ba9a |
290 | newtokens = zrealloc(tokens,sizeof(sds)*slots); |
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291 | if (newtokens == NULL) { |
292 | #ifdef SDS_ABORT_ON_OOM |
293 | sdsOomAbort(); |
294 | #else |
295 | goto cleanup; |
296 | #endif |
297 | } |
298 | tokens = newtokens; |
299 | } |
300 | /* search the separator */ |
301 | if ((seplen == 1 && *(s+j) == sep[0]) || (memcmp(s+j,sep,seplen) == 0)) { |
302 | tokens[elements] = sdsnewlen(s+start,j-start); |
303 | if (tokens[elements] == NULL) { |
304 | #ifdef SDS_ABORT_ON_OOM |
305 | sdsOomAbort(); |
306 | #else |
307 | goto cleanup; |
308 | #endif |
309 | } |
310 | elements++; |
311 | start = j+seplen; |
312 | j = j+seplen-1; /* skip the separator */ |
313 | } |
314 | } |
315 | /* Add the final element. We are sure there is room in the tokens array. */ |
316 | tokens[elements] = sdsnewlen(s+start,len-start); |
317 | if (tokens[elements] == NULL) { |
318 | #ifdef SDS_ABORT_ON_OOM |
319 | sdsOomAbort(); |
320 | #else |
321 | goto cleanup; |
322 | #endif |
323 | } |
324 | elements++; |
325 | *count = elements; |
326 | return tokens; |
327 | |
328 | #ifndef SDS_ABORT_ON_OOM |
329 | cleanup: |
330 | { |
331 | int i; |
332 | for (i = 0; i < elements; i++) sdsfree(tokens[i]); |
333 | zfree(tokens); |
334 | return NULL; |
335 | } |
336 | #endif |
337 | } |
a34e0a25 |
338 | |
339 | void sdsfreesplitres(sds *tokens, int count) { |
340 | if (!tokens) return; |
341 | while(count--) |
342 | sdsfree(tokens[count]); |
343 | zfree(tokens); |
344 | } |
ee14da56 |
345 | |
346 | sds sdsfromlonglong(long long value) { |
347 | char buf[32], *p; |
348 | unsigned long long v; |
349 | |
350 | v = (value < 0) ? -value : value; |
351 | p = buf+31; /* point to the last character */ |
352 | do { |
353 | *p-- = '0'+(v%10); |
354 | v /= 10; |
355 | } while(v); |
356 | if (value < 0) *p-- = '-'; |
357 | p++; |
358 | return sdsnewlen(p,32-(p-buf)); |
359 | } |