1 /* $NetBSD: str.c,v 1.36 2016/04/06 09:57:00 gson Exp $ */ 2 3 /*- 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /*- 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #ifndef MAKE_NATIVE 72 static char rcsid[] = "$NetBSD: str.c,v 1.36 2016/04/06 09:57:00 gson Exp $"; 73 #else 74 #include <sys/cdefs.h> 75 #ifndef lint 76 #if 0 77 static char sccsid[] = "@(#)str.c 5.8 (Berkeley) 6/1/90"; 78 #else 79 __RCSID("$NetBSD: str.c,v 1.36 2016/04/06 09:57:00 gson Exp $"); 80 #endif 81 #endif /* not lint */ 82 #endif 83 84 #include "make.h" 85 86 /*- 87 * str_concat -- 88 * concatenate the two strings, inserting a space or slash between them, 89 * freeing them if requested. 90 * 91 * returns -- 92 * the resulting string in allocated space. 93 */ 94 char * 95 str_concat(const char *s1, const char *s2, int flags) 96 { 97 int len1, len2; 98 char *result; 99 100 /* get the length of both strings */ 101 len1 = strlen(s1); 102 len2 = strlen(s2); 103 104 /* allocate length plus separator plus EOS */ 105 result = bmake_malloc((unsigned int)(len1 + len2 + 2)); 106 107 /* copy first string into place */ 108 memcpy(result, s1, len1); 109 110 /* add separator character */ 111 if (flags & STR_ADDSPACE) { 112 result[len1] = ' '; 113 ++len1; 114 } else if (flags & STR_ADDSLASH) { 115 result[len1] = '/'; 116 ++len1; 117 } 118 119 /* copy second string plus EOS into place */ 120 memcpy(result + len1, s2, len2 + 1); 121 122 return(result); 123 } 124 125 /*- 126 * brk_string -- 127 * Fracture a string into an array of words (as delineated by tabs or 128 * spaces) taking quotation marks into account. Leading tabs/spaces 129 * are ignored. 130 * 131 * If expand is TRUE, quotes are removed and escape sequences 132 * such as \r, \t, etc... are expanded. 133 * 134 * returns -- 135 * Pointer to the array of pointers to the words. 136 * Memory containing the actual words in *buffer. 137 * Both of these must be free'd by the caller. 138 * Number of words in *store_argc. 139 */ 140 char ** 141 brk_string(const char *str, int *store_argc, Boolean expand, char **buffer) 142 { 143 int argc, ch; 144 char inquote, *start, *t; 145 const char *p; 146 int len; 147 int argmax = 50, curlen = 0; 148 char **argv; 149 150 /* skip leading space chars. */ 151 for (; *str == ' ' || *str == '\t'; ++str) 152 continue; 153 154 /* allocate room for a copy of the string */ 155 if ((len = strlen(str) + 1) > curlen) 156 *buffer = bmake_malloc(curlen = len); 157 158 /* 159 * initial argmax based on len 160 */ 161 argmax = MAX((len / 5), 50); 162 argv = bmake_malloc((argmax + 1) * sizeof(char *)); 163 164 /* 165 * copy the string; at the same time, parse backslashes, 166 * quotes and build the argument list. 167 */ 168 argc = 0; 169 inquote = '\0'; 170 for (p = str, start = t = *buffer;; ++p) { 171 switch(ch = *p) { 172 case '"': 173 case '\'': 174 if (inquote) { 175 if (inquote == ch) 176 inquote = '\0'; 177 else 178 break; 179 } 180 else { 181 inquote = (char) ch; 182 /* Don't miss "" or '' */ 183 if (start == NULL && p[1] == inquote) { 184 if (!expand) { 185 start = t; 186 *t++ = ch; 187 } else 188 start = t + 1; 189 p++; 190 inquote = '\0'; 191 break; 192 } 193 } 194 if (!expand) { 195 if (!start) 196 start = t; 197 *t++ = ch; 198 } 199 continue; 200 case ' ': 201 case '\t': 202 case '\n': 203 if (inquote) 204 break; 205 if (!start) 206 continue; 207 /* FALLTHROUGH */ 208 case '\0': 209 /* 210 * end of a token -- make sure there's enough argv 211 * space and save off a pointer. 212 */ 213 if (!start) 214 goto done; 215 216 *t++ = '\0'; 217 if (argc == argmax) { 218 argmax *= 2; /* ramp up fast */ 219 argv = (char **)bmake_realloc(argv, 220 (argmax + 1) * sizeof(char *)); 221 } 222 argv[argc++] = start; 223 start = NULL; 224 if (ch == '\n' || ch == '\0') { 225 if (expand && inquote) { 226 free(argv); 227 free(*buffer); 228 *buffer = NULL; 229 return NULL; 230 } 231 goto done; 232 } 233 continue; 234 case '\\': 235 if (!expand) { 236 if (!start) 237 start = t; 238 *t++ = '\\'; 239 if (*(p+1) == '\0') /* catch '\' at end of line */ 240 continue; 241 ch = *++p; 242 break; 243 } 244 245 switch (ch = *++p) { 246 case '\0': 247 case '\n': 248 /* hmmm; fix it up as best we can */ 249 ch = '\\'; 250 --p; 251 break; 252 case 'b': 253 ch = '\b'; 254 break; 255 case 'f': 256 ch = '\f'; 257 break; 258 case 'n': 259 ch = '\n'; 260 break; 261 case 'r': 262 ch = '\r'; 263 break; 264 case 't': 265 ch = '\t'; 266 break; 267 } 268 break; 269 } 270 if (!start) 271 start = t; 272 *t++ = (char) ch; 273 } 274 done: argv[argc] = NULL; 275 *store_argc = argc; 276 return(argv); 277 } 278 279 /* 280 * Str_FindSubstring -- See if a string contains a particular substring. 281 * 282 * Input: 283 * string String to search. 284 * substring Substring to find in string. 285 * 286 * Results: If string contains substring, the return value is the location of 287 * the first matching instance of substring in string. If string doesn't 288 * contain substring, the return value is NULL. Matching is done on an exact 289 * character-for-character basis with no wildcards or special characters. 290 * 291 * Side effects: None. 292 */ 293 char * 294 Str_FindSubstring(const char *string, const char *substring) 295 { 296 const char *a, *b; 297 298 /* 299 * First scan quickly through the two strings looking for a single- 300 * character match. When it's found, then compare the rest of the 301 * substring. 302 */ 303 304 for (b = substring; *string != 0; string += 1) { 305 if (*string != *b) 306 continue; 307 a = string; 308 for (;;) { 309 if (*b == 0) 310 return UNCONST(string); 311 if (*a++ != *b++) 312 break; 313 } 314 b = substring; 315 } 316 return NULL; 317 } 318 319 /* 320 * Str_Match -- 321 * 322 * See if a particular string matches a particular pattern. 323 * 324 * Results: Non-zero is returned if string matches pattern, 0 otherwise. The 325 * matching operation permits the following special characters in the 326 * pattern: *?\[] (see the man page for details on what these mean). 327 * 328 * XXX this function does not detect or report malformed patterns. 329 * 330 * Side effects: None. 331 */ 332 int 333 Str_Match(const char *string, const char *pattern) 334 { 335 char c2; 336 337 for (;;) { 338 /* 339 * See if we're at the end of both the pattern and the 340 * string. If, we succeeded. If we're at the end of the 341 * pattern but not at the end of the string, we failed. 342 */ 343 if (*pattern == 0) 344 return(!*string); 345 if (*string == 0 && *pattern != '*') 346 return(0); 347 /* 348 * Check for a "*" as the next pattern character. It matches 349 * any substring. We handle this by calling ourselves 350 * recursively for each postfix of string, until either we 351 * match or we reach the end of the string. 352 */ 353 if (*pattern == '*') { 354 pattern += 1; 355 if (*pattern == 0) 356 return(1); 357 while (*string != 0) { 358 if (Str_Match(string, pattern)) 359 return(1); 360 ++string; 361 } 362 return(0); 363 } 364 /* 365 * Check for a "?" as the next pattern character. It matches 366 * any single character. 367 */ 368 if (*pattern == '?') 369 goto thisCharOK; 370 /* 371 * Check for a "[" as the next pattern character. It is 372 * followed by a list of characters that are acceptable, or 373 * by a range (two characters separated by "-"). 374 */ 375 if (*pattern == '[') { 376 ++pattern; 377 for (;;) { 378 if ((*pattern == ']') || (*pattern == 0)) 379 return(0); 380 if (*pattern == *string) 381 break; 382 if (pattern[1] == '-') { 383 c2 = pattern[2]; 384 if (c2 == 0) 385 return(0); 386 if ((*pattern <= *string) && 387 (c2 >= *string)) 388 break; 389 if ((*pattern >= *string) && 390 (c2 <= *string)) 391 break; 392 pattern += 2; 393 } 394 ++pattern; 395 } 396 while ((*pattern != ']') && (*pattern != 0)) 397 ++pattern; 398 goto thisCharOK; 399 } 400 /* 401 * If the next pattern character is '/', just strip off the 402 * '/' so we do exact matching on the character that follows. 403 */ 404 if (*pattern == '\\') { 405 ++pattern; 406 if (*pattern == 0) 407 return(0); 408 } 409 /* 410 * There's no special character. Just make sure that the 411 * next characters of each string match. 412 */ 413 if (*pattern != *string) 414 return(0); 415 thisCharOK: ++pattern; 416 ++string; 417 } 418 } 419 420 421 /*- 422 *----------------------------------------------------------------------- 423 * Str_SYSVMatch -- 424 * Check word against pattern for a match (% is wild), 425 * 426 * Input: 427 * word Word to examine 428 * pattern Pattern to examine against 429 * len Number of characters to substitute 430 * 431 * Results: 432 * Returns the beginning position of a match or null. The number 433 * of characters matched is returned in len. 434 * 435 * Side Effects: 436 * None 437 * 438 *----------------------------------------------------------------------- 439 */ 440 char * 441 Str_SYSVMatch(const char *word, const char *pattern, int *len) 442 { 443 const char *p = pattern; 444 const char *w = word; 445 const char *m; 446 447 if (*p == '\0') { 448 /* Null pattern is the whole string */ 449 *len = strlen(w); 450 return UNCONST(w); 451 } 452 453 if ((m = strchr(p, '%')) != NULL) { 454 /* check that the prefix matches */ 455 for (; p != m && *w && *w == *p; w++, p++) 456 continue; 457 458 if (p != m) 459 return NULL; /* No match */ 460 461 if (*++p == '\0') { 462 /* No more pattern, return the rest of the string */ 463 *len = strlen(w); 464 return UNCONST(w); 465 } 466 } 467 468 m = w; 469 470 /* Find a matching tail */ 471 do 472 if (strcmp(p, w) == 0) { 473 *len = w - m; 474 return UNCONST(m); 475 } 476 while (*w++ != '\0'); 477 478 return NULL; 479 } 480 481 482 /*- 483 *----------------------------------------------------------------------- 484 * Str_SYSVSubst -- 485 * Substitute '%' on the pattern with len characters from src. 486 * If the pattern does not contain a '%' prepend len characters 487 * from src. 488 * 489 * Results: 490 * None 491 * 492 * Side Effects: 493 * Places result on buf 494 * 495 *----------------------------------------------------------------------- 496 */ 497 void 498 Str_SYSVSubst(Buffer *buf, char *pat, char *src, int len) 499 { 500 char *m; 501 502 if ((m = strchr(pat, '%')) != NULL) { 503 /* Copy the prefix */ 504 Buf_AddBytes(buf, m - pat, pat); 505 /* skip the % */ 506 pat = m + 1; 507 } 508 509 /* Copy the pattern */ 510 Buf_AddBytes(buf, len, src); 511 512 /* append the rest */ 513 Buf_AddBytes(buf, strlen(pat), pat); 514 } 515