Mercurial > hg > nnchat
annotate th_string.c @ 358:98a3c525266b
Added tag dev-0_9_7 for changeset 2aef8606539e
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Thu, 23 Jun 2011 09:00:14 +0300 |
| parents | fae4651d37bc |
| children | b3556ff686fc |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Miscellaneous string-handling related utility-functions | |
| 3 * Programmed and designed by Matti 'ccr' Hamalainen | |
| 4 * (C) Copyright 2002-2008 Tecnic Software productions (TNSP) | |
| 5 * | |
| 6 * Please read file 'COPYING' for information on license and distribution. | |
| 7 */ | |
| 8 #ifdef HAVE_CONFIG_H | |
| 2 | 9 #include "config.h" |
| 0 | 10 #endif |
| 11 #include "th_string.h" | |
| 12 | |
| 79 | 13 /* strdup with a NULL check |
| 14 */ | |
| 15 char *th_strdup(const char *s) | |
| 16 { | |
| 81 | 17 char *res; |
| 18 if (s == NULL) | |
| 19 return NULL; | |
| 20 | |
| 21 if ((res = th_malloc(strlen(s) + 1)) == NULL) | |
| 22 return NULL; | |
| 23 | |
| 24 strcpy(res, s); | |
| 25 return res; | |
| 79 | 26 } |
| 27 | |
| 28 | |
| 124 | 29 char *th_strncpy(char * dst, const char * src, const size_t n) |
| 0 | 30 { |
| 81 | 31 const char *s = src; |
| 32 char *d = dst; | |
| 33 size_t i; | |
| 34 assert(src != NULL); | |
| 35 assert(dst != NULL); | |
| 0 | 36 |
| 81 | 37 /* Copy to the destination */ |
| 38 i = n; | |
| 124 | 39 while (*s && i > 0) { |
| 81 | 40 *(d++) = *(s++); |
| 41 i--; | |
| 42 } | |
| 0 | 43 |
| 81 | 44 /* Fill rest of space with zeros */ |
| 45 while (i > 0) { | |
| 46 *(d++) = 0; | |
| 47 i--; | |
| 48 } | |
| 0 | 49 |
| 81 | 50 /* Ensure that last is always zero */ |
| 51 dst[n - 1] = 0; | |
| 0 | 52 |
| 81 | 53 return dst; |
| 0 | 54 } |
| 55 | |
| 56 | |
| 126 | 57 /* Simulate a sprintf() that allocates memory |
| 124 | 58 */ |
| 59 char * th_strdup_vprintf(const char *fmt, va_list args) | |
| 60 { | |
| 127 | 61 int size = 100; |
| 126 | 62 char *buf, *nbuf = NULL; |
| 124 | 63 |
| 126 | 64 if ((buf = th_malloc(size)) == NULL) |
| 65 return NULL; | |
| 66 | |
| 67 while (1) { | |
| 127 | 68 int n = vsnprintf(buf, size, fmt, args); |
| 126 | 69 if (n > -1 && n < size) |
| 70 return buf; | |
| 71 if (n > -1) | |
| 72 size = n + 1; | |
| 73 else | |
| 74 size *= 2; | |
| 75 | |
| 76 if ((nbuf = th_realloc(nbuf, size)) == NULL) { | |
| 77 th_free(buf); | |
| 78 return NULL; | |
| 124 | 79 } |
| 126 | 80 |
| 81 buf = nbuf; | |
| 124 | 82 } |
| 83 } | |
| 84 | |
| 85 | |
| 86 char * th_strdup_printf(const char *fmt, ...) | |
| 87 { | |
| 88 char *res; | |
| 89 va_list ap; | |
| 90 | |
| 91 va_start(ap, fmt); | |
| 92 res = th_strdup_vprintf(fmt, ap); | |
| 93 va_end(ap); | |
| 94 | |
| 95 return res; | |
| 96 } | |
| 126 | 97 |
| 124 | 98 |
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99 void th_pstr_vprintf(char **buf, const char *fmt, va_list ap) |
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100 { |
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101 char *tmp = th_strdup_vprintf(fmt, ap); |
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102 th_free(*buf); |
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103 *buf = tmp; |
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104 } |
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105 |
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106 |
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107 void th_pstr_printf(char **buf, const char *fmt, ...) |
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108 { |
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109 char *tmp; |
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110 va_list ap; |
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111 |
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112 va_start(ap, fmt); |
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113 tmp = th_strdup_vprintf(fmt, ap); |
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114 va_end(ap); |
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115 |
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116 th_free(*buf); |
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117 *buf = tmp; |
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118 } |
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119 |
| 124 | 120 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
| 121 */ | |
| 122 int th_strcasecmp(const char * str1, const char * str2) | |
| 123 { | |
| 124 const char *s1 = str1, *s2 = str2; | |
| 81 | 125 assert(str1 != NULL); |
| 126 assert(str2 != NULL); | |
| 0 | 127 |
| 81 | 128 if (str1 == str2) |
| 129 return 0; | |
| 0 | 130 |
| 124 | 131 while (*s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) { |
| 81 | 132 s1++; |
| 133 s2++; | |
| 134 } | |
| 0 | 135 |
| 81 | 136 return (th_tolower(*s1) - th_tolower(*s2)); |
| 0 | 137 } |
| 138 | |
| 139 | |
| 124 | 140 int th_strncasecmp(const char * str1, const char * str2, size_t n) |
| 0 | 141 { |
| 124 | 142 const char *s1 = str1, *s2 = str2; |
| 81 | 143 assert(str1 != NULL); |
| 144 assert(str2 != NULL); | |
| 0 | 145 |
| 81 | 146 if (str1 == str2) |
| 147 return 0; | |
| 0 | 148 |
| 124 | 149 while (n > 0 && *s1 && *s2 && th_tolower(*s1) == th_tolower(*s2)) { |
| 81 | 150 s1++; |
| 151 s2++; | |
| 152 n--; | |
| 153 } | |
| 0 | 154 |
| 124 | 155 return n > 0 ? (th_tolower(*s1) - th_tolower(*s2)) : 0; |
| 0 | 156 } |
| 157 | |
| 158 | |
| 159 /* Remove all occurences of control characters, in-place. | |
| 160 * Resulting string is always shorter or same length than original. | |
| 161 */ | |
| 11 | 162 void th_strip_ctrlchars(char * str) |
| 0 | 163 { |
| 81 | 164 char *i, *j; |
| 165 assert(str != NULL); | |
| 0 | 166 |
| 81 | 167 i = str; |
| 168 j = str; | |
| 169 while (*i) { | |
| 170 if (!th_iscntrl(*i)) | |
| 171 *(j++) = *i; | |
| 172 i++; | |
| 173 } | |
| 0 | 174 |
| 81 | 175 *j = 0; |
| 0 | 176 } |
| 177 | |
| 178 | |
| 11 | 179 /* Copy a given string over in *result. |
| 0 | 180 */ |
| 124 | 181 int th_pstrcpy(char ** result, const char * str) |
| 0 | 182 { |
| 81 | 183 assert(result != NULL); |
| 0 | 184 |
| 81 | 185 if (str == NULL) |
| 186 return -1; | |
| 0 | 187 |
| 81 | 188 th_free(*result); |
| 124 | 189 if ((*result = th_malloc(strlen(str) + 1)) == NULL) |
| 81 | 190 return -2; |
| 0 | 191 |
| 81 | 192 strcpy(*result, str); |
| 193 return 0; | |
| 0 | 194 } |
| 195 | |
| 196 | |
| 11 | 197 /* Concatenates a given string into string pointed by *result. |
| 0 | 198 */ |
| 124 | 199 int th_pstrcat(char ** result, const char * str) |
| 0 | 200 { |
| 81 | 201 assert(result != NULL); |
| 0 | 202 |
| 81 | 203 if (str == NULL) |
| 204 return -1; | |
| 0 | 205 |
| 81 | 206 if (*result != NULL) { |
| 124 | 207 *result = th_realloc(*result, strlen(*result) + strlen(str) + 1); |
| 81 | 208 if (*result == NULL) |
| 209 return -1; | |
| 0 | 210 |
| 81 | 211 strcat(*result, str); |
| 212 } else { | |
| 124 | 213 *result = th_malloc(strlen(str) + 1); |
| 81 | 214 if (*result == NULL) |
| 215 return -1; | |
| 0 | 216 |
| 81 | 217 strcpy(*result, str); |
| 218 } | |
| 0 | 219 |
| 81 | 220 return 0; |
| 0 | 221 } |
| 222 | |
| 223 | |
| 224 /* Find next non-whitespace character in string. | |
| 225 * Updates iPos into the position of such character and | |
| 226 * returns pointer to the string. | |
| 227 */ | |
| 124 | 228 const char *th_findnext(const char * str, size_t * pos) |
| 0 | 229 { |
| 81 | 230 assert(str != NULL); |
| 0 | 231 |
| 81 | 232 /* Terminating NULL-character is not whitespace! */ |
| 124 | 233 while (th_isspace(str[*pos])) |
| 234 (*pos)++; | |
| 235 return &str[*pos]; | |
| 0 | 236 } |
| 237 | |
| 238 | |
| 124 | 239 /* Find next sep-character from string |
| 0 | 240 */ |
| 124 | 241 const char *th_findsep(const char * str, size_t * pos, char sep) |
| 0 | 242 { |
| 81 | 243 assert(str != NULL); |
| 0 | 244 |
| 124 | 245 while (str[*pos] && str[*pos] != sep) |
| 246 (*pos)++; | |
| 247 | |
| 248 return &str[*pos]; | |
| 0 | 249 } |
| 250 | |
| 251 | |
| 124 | 252 /* Find next sep- or whitespace from string |
| 0 | 253 */ |
| 124 | 254 const char *th_findseporspace(const char * str, size_t * pos, char sep) |
| 0 | 255 { |
| 81 | 256 assert(str != NULL); |
| 0 | 257 |
| 124 | 258 while (!th_isspace(str[*pos]) && str[*pos] != sep) |
| 259 (*pos)++; | |
| 260 | |
| 261 return &str[*pos]; | |
| 0 | 262 } |
| 263 | |
| 264 | |
| 265 /* Compare a string to a pattern. Case-SENSITIVE version. | |
| 266 * The matching pattern can consist of any normal characters plus | |
| 267 * wildcards ? and *. "?" matches any character and "*" matches | |
| 268 * any number of characters. | |
| 269 */ | |
| 124 | 270 BOOL th_strmatch(const char * str, const char * pattern) |
| 0 | 271 { |
| 81 | 272 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
| 124 | 273 const char *tmpPattern = NULL; |
| 0 | 274 |
| 81 | 275 /* Check given pattern and string */ |
| 276 if (str == NULL || pattern == NULL) | |
| 277 return FALSE; | |
| 0 | 278 |
| 81 | 279 /* Start comparision */ |
| 280 do { | |
| 281 didMatch = FALSE; | |
| 282 switch (*pattern) { | |
| 283 case '?': | |
| 284 /* Any single character matches */ | |
| 285 if (*str) { | |
| 286 didMatch = TRUE; | |
| 287 pattern++; | |
| 288 str++; | |
| 289 } | |
| 290 break; | |
| 0 | 291 |
| 81 | 292 case '*': |
| 293 didMatch = TRUE; | |
| 294 pattern++; | |
| 295 if (!*pattern) | |
| 296 isEnd = TRUE; | |
| 297 isAnyMode = TRUE; | |
| 298 tmpPattern = pattern; | |
| 299 break; | |
| 0 | 300 |
| 81 | 301 case 0: |
| 302 if (isAnyMode) { | |
| 303 if (*str) | |
| 304 str++; | |
| 305 else | |
| 306 isEnd = TRUE; | |
| 307 } else { | |
| 308 if (*str) { | |
| 309 if (tmpPattern) { | |
| 310 isAnyMode = TRUE; | |
| 311 pattern = tmpPattern; | |
| 312 } else | |
| 313 didMatch = FALSE; | |
| 314 } else | |
| 315 isEnd = TRUE; | |
| 316 } | |
| 317 break; | |
| 318 default: | |
| 319 if (isAnyMode) { | |
| 320 if (*pattern == *str) { | |
| 321 isAnyMode = FALSE; | |
| 322 didMatch = TRUE; | |
| 323 } else { | |
| 324 if (*str) { | |
| 325 didMatch = TRUE; | |
| 326 str++; | |
| 327 } | |
| 328 } | |
| 329 } else { | |
| 330 if (*pattern == *str) { | |
| 331 didMatch = TRUE; | |
| 332 if (*pattern) | |
| 333 pattern++; | |
| 334 if (*str) | |
| 335 str++; | |
| 336 } else { | |
| 337 if (tmpPattern) { | |
| 338 didMatch = TRUE; | |
| 339 isAnyMode = TRUE; | |
| 340 pattern = tmpPattern; | |
| 341 } | |
| 342 } | |
| 343 } | |
| 0 | 344 |
| 81 | 345 if (!*str && !*pattern) |
| 346 isEnd = TRUE; | |
| 347 break; | |
| 0 | 348 |
| 81 | 349 } /* switch */ |
| 0 | 350 |
| 81 | 351 } while (didMatch && !isEnd); |
| 0 | 352 |
| 81 | 353 return didMatch; |
| 0 | 354 } |
| 355 | |
| 356 | |
| 357 /* Compare a string to a pattern. Case-INSENSITIVE version. | |
| 358 */ | |
| 124 | 359 BOOL th_strcasematch(const char * str, const char * pattern) |
| 0 | 360 { |
| 81 | 361 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
| 124 | 362 const char *tmpPattern = NULL; |
| 0 | 363 |
| 81 | 364 /* Check given pattern and string */ |
| 365 if (str == NULL || pattern == NULL) | |
| 366 return FALSE; | |
| 0 | 367 |
| 81 | 368 /* Start comparision */ |
| 369 do { | |
| 370 switch (*pattern) { | |
| 371 case '?': | |
| 372 /* Any single character matches */ | |
| 373 if (*str) { | |
| 374 pattern++; | |
| 375 str++; | |
| 376 } else | |
| 377 didMatch = FALSE; | |
| 378 break; | |
| 0 | 379 |
| 81 | 380 case '*': |
| 381 pattern++; | |
| 382 if (!*pattern || *pattern == '?') | |
| 383 isEnd = TRUE; | |
| 384 isAnyMode = TRUE; | |
| 385 tmpPattern = pattern; | |
| 386 break; | |
| 0 | 387 |
| 81 | 388 case 0: |
| 389 if (isAnyMode) { | |
| 390 if (*str) | |
| 391 str++; | |
| 392 else | |
| 393 isEnd = TRUE; | |
| 394 } else { | |
| 395 if (*str) { | |
| 396 if (tmpPattern) { | |
| 397 isAnyMode = TRUE; | |
| 398 pattern = tmpPattern; | |
| 399 } else | |
| 400 didMatch = FALSE; | |
| 401 } else | |
| 402 isEnd = TRUE; | |
| 403 } | |
| 404 break; | |
| 0 | 405 |
| 81 | 406 default: |
| 407 if (isAnyMode) { | |
| 408 if (th_tolower(*pattern) == th_tolower(*str)) { | |
| 409 isAnyMode = FALSE; | |
| 410 } else { | |
| 411 if (*str) | |
| 412 str++; | |
| 413 else | |
| 414 didMatch = FALSE; | |
| 415 } | |
| 416 } else { | |
| 417 if (th_tolower(*pattern) == th_tolower(*str)) { | |
| 418 if (*pattern) | |
| 419 pattern++; | |
| 420 if (*str) | |
| 421 str++; | |
| 422 } else { | |
| 423 if (tmpPattern) { | |
| 424 isAnyMode = TRUE; | |
| 425 pattern = tmpPattern; | |
| 426 } else | |
| 427 didMatch = FALSE; | |
| 428 } | |
| 429 } | |
| 0 | 430 |
| 81 | 431 if (!*str && !*pattern) |
| 432 isEnd = TRUE; | |
| 433 break; | |
| 0 | 434 |
| 81 | 435 } /* switch */ |
| 0 | 436 |
| 81 | 437 } while (didMatch && !isEnd); |
| 0 | 438 |
| 81 | 439 return didMatch; |
| 0 | 440 } |
| 441 | |
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442 |
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443 int th_get_hex_triplet(const char *str) |
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444 { |
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445 const char *p = str; |
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446 int len, val = 0; |
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447 |
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448 for (len = 0; *p && len < 6; p++, len++) { |
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449 if (*p >= '0' && *p <= '9') { |
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450 val *= 16; val += (*p - '0'); |
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451 } else if (*p >= 'A' && *p <= 'F') { |
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452 val *= 16; val += (*p - 'A') + 10; |
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453 } else if (*p >= 'a' && *p <= 'f') { |
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454 val *= 16; val += (*p - 'a') + 10; |
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455 } else |
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456 return -1; |
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457 } |
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458 |
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459 return (len == 6) ? val : -1; |
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460 } |
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461 |
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462 |
| 327 | 463 BOOL th_growbuf(char **buf, size_t *bufsize, size_t *len, size_t grow) |
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464 { |
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465 if (*buf == NULL) |
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466 *bufsize = *len = 0; |
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467 |
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468 if (*buf == NULL || *len + grow >= *bufsize) { |
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469 *bufsize += grow + TH_BUFGROW; |
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470 *buf = (char *) th_realloc(*buf, *bufsize); |
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471 if (*buf == NULL) |
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472 return FALSE; |
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473 } |
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474 return TRUE; |
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475 } |
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476 |
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477 |
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478 BOOL th_vputch(char **buf, size_t *bufsize, size_t *len, const char ch) |
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479 { |
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480 if (!th_growbuf(buf, bufsize, len, 1)) |
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481 return FALSE; |
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482 |
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483 (*buf)[*len] = ch; |
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484 (*len)++; |
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485 |
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486 return TRUE; |
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487 } |
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488 |
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489 |
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490 BOOL th_vputs(char **buf, size_t *bufsize, size_t *len, const char *str) |
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491 { |
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492 size_t slen; |
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493 if (str == NULL) |
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494 return FALSE; |
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495 |
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496 slen = strlen(str); |
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497 if (!th_growbuf(buf, bufsize, len, slen)) |
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498 return FALSE; |
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499 |
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500 strcpy(*buf + *len, str); |
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501 (*len) += slen; |
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502 |
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503 return TRUE; |
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504 } |
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505 |