| 1 | /* A GNU-like <string.h>. |
| 2 | |
| 3 | Copyright (C) 1995-1996, 2001-2009 Free Software Foundation, Inc. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU Lesser General Public License as published by |
| 7 | the Free Software Foundation; either version 2, or (at your option) |
| 8 | any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public License |
| 16 | along with this program; if not, write to the Free Software Foundation, |
| 17 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 18 | |
| 19 | #ifndef _GL_STRING_H |
| 20 | |
| 21 | #if __GNUC__ >= 3 |
| 22 | @PRAGMA_SYSTEM_HEADER@ |
| 23 | #endif |
| 24 | |
| 25 | /* The include_next requires a split double-inclusion guard. */ |
| 26 | #@INCLUDE_NEXT@ @NEXT_STRING_H@ |
| 27 | |
| 28 | #ifndef _GL_STRING_H |
| 29 | #define _GL_STRING_H |
| 30 | |
| 31 | /* NetBSD 5.0 mis-defines NULL. */ |
| 32 | #include <stddef.h> |
| 33 | |
| 34 | #ifndef __attribute__ |
| 35 | /* This feature is available in gcc versions 2.5 and later. */ |
| 36 | # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) |
| 37 | # define __attribute__(Spec) /* empty */ |
| 38 | # endif |
| 39 | /* The attribute __pure__ was added in gcc 2.96. */ |
| 40 | # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96) |
| 41 | # define __pure__ /* empty */ |
| 42 | # endif |
| 43 | #endif |
| 44 | |
| 45 | |
| 46 | /* The definition of GL_LINK_WARNING is copied here. */ |
| 47 | |
| 48 | |
| 49 | #ifdef __cplusplus |
| 50 | extern "C" { |
| 51 | #endif |
| 52 | |
| 53 | |
| 54 | /* Return the first instance of C within N bytes of S, or NULL. */ |
| 55 | #if @GNULIB_MEMCHR@ |
| 56 | # if @REPLACE_MEMCHR@ |
| 57 | # define memchr rpl_memchr |
| 58 | extern void *memchr (void const *__s, int __c, size_t __n) |
| 59 | __attribute__ ((__pure__)); |
| 60 | # endif |
| 61 | #elif defined GNULIB_POSIXCHECK |
| 62 | # undef memchr |
| 63 | # define memchr(s,c,n) \ |
| 64 | (GL_LINK_WARNING ("memchr has platform-specific bugs - " \ |
| 65 | "use gnulib module memchr for portability" ), \ |
| 66 | memchr (s, c, n)) |
| 67 | #endif |
| 68 | |
| 69 | /* Return the first occurrence of NEEDLE in HAYSTACK. */ |
| 70 | #if @GNULIB_MEMMEM@ |
| 71 | # if @REPLACE_MEMMEM@ |
| 72 | # define memmem rpl_memmem |
| 73 | # endif |
| 74 | # if ! @HAVE_DECL_MEMMEM@ || @REPLACE_MEMMEM@ |
| 75 | extern void *memmem (void const *__haystack, size_t __haystack_len, |
| 76 | void const *__needle, size_t __needle_len) |
| 77 | __attribute__ ((__pure__)); |
| 78 | # endif |
| 79 | #elif defined GNULIB_POSIXCHECK |
| 80 | # undef memmem |
| 81 | # define memmem(a,al,b,bl) \ |
| 82 | (GL_LINK_WARNING ("memmem is unportable and often quadratic - " \ |
| 83 | "use gnulib module memmem-simple for portability, " \ |
| 84 | "and module memmem for speed" ), \ |
| 85 | memmem (a, al, b, bl)) |
| 86 | #endif |
| 87 | |
| 88 | /* Copy N bytes of SRC to DEST, return pointer to bytes after the |
| 89 | last written byte. */ |
| 90 | #if @GNULIB_MEMPCPY@ |
| 91 | # if ! @HAVE_MEMPCPY@ |
| 92 | extern void *mempcpy (void *restrict __dest, void const *restrict __src, |
| 93 | size_t __n); |
| 94 | # endif |
| 95 | #elif defined GNULIB_POSIXCHECK |
| 96 | # undef mempcpy |
| 97 | # define mempcpy(a,b,n) \ |
| 98 | (GL_LINK_WARNING ("mempcpy is unportable - " \ |
| 99 | "use gnulib module mempcpy for portability"), \ |
| 100 | mempcpy (a, b, n)) |
| 101 | #endif |
| 102 | |
| 103 | /* Search backwards through a block for a byte (specified as an int). */ |
| 104 | #if @GNULIB_MEMRCHR@ |
| 105 | # if ! @HAVE_DECL_MEMRCHR@ |
| 106 | extern void *memrchr (void const *, int, size_t) |
| 107 | __attribute__ ((__pure__)); |
| 108 | # endif |
| 109 | #elif defined GNULIB_POSIXCHECK |
| 110 | # undef memrchr |
| 111 | # define memrchr(a,b,c) \ |
| 112 | (GL_LINK_WARNING ("memrchr is unportable - " \ |
| 113 | "use gnulib module memrchr for portability"), \ |
| 114 | memrchr (a, b, c)) |
| 115 | #endif |
| 116 | |
| 117 | /* Find the first occurrence of C in S. More efficient than |
| 118 | memchr(S,C,N), at the expense of undefined behavior if C does not |
| 119 | occur within N bytes. */ |
| 120 | #if @GNULIB_RAWMEMCHR@ |
| 121 | # if ! @HAVE_RAWMEMCHR@ |
| 122 | extern void *rawmemchr (void const *__s, int __c_in) |
| 123 | __attribute__ ((__pure__)); |
| 124 | # endif |
| 125 | #elif defined GNULIB_POSIXCHECK |
| 126 | # undef rawmemchr |
| 127 | # define rawmemchr(a,b) \ |
| 128 | (GL_LINK_WARNING ("rawmemchr is unportable - " \ |
| 129 | "use gnulib module rawmemchr for portability"), \ |
| 130 | rawmemchr (a, b)) |
| 131 | #endif |
| 132 | |
| 133 | /* Copy SRC to DST, returning the address of the terminating '\0' in DST. */ |
| 134 | #if @GNULIB_STPCPY@ |
| 135 | # if ! @HAVE_STPCPY@ |
| 136 | extern char *stpcpy (char *restrict __dst, char const *restrict __src); |
| 137 | # endif |
| 138 | #elif defined GNULIB_POSIXCHECK |
| 139 | # undef stpcpy |
| 140 | # define stpcpy(a,b) \ |
| 141 | (GL_LINK_WARNING ("stpcpy is unportable - " \ |
| 142 | "use gnulib module stpcpy for portability"), \ |
| 143 | stpcpy (a, b)) |
| 144 | #endif |
| 145 | |
| 146 | /* Copy no more than N bytes of SRC to DST, returning a pointer past the |
| 147 | last non-NUL byte written into DST. */ |
| 148 | #if @GNULIB_STPNCPY@ |
| 149 | # if ! @HAVE_STPNCPY@ |
| 150 | # define stpncpy gnu_stpncpy |
| 151 | extern char *stpncpy (char *restrict __dst, char const *restrict __src, |
| 152 | size_t __n); |
| 153 | # endif |
| 154 | #elif defined GNULIB_POSIXCHECK |
| 155 | # undef stpncpy |
| 156 | # define stpncpy(a,b,n) \ |
| 157 | (GL_LINK_WARNING ("stpncpy is unportable - " \ |
| 158 | "use gnulib module stpncpy for portability"), \ |
| 159 | stpncpy (a, b, n)) |
| 160 | #endif |
| 161 | |
| 162 | #if defined GNULIB_POSIXCHECK |
| 163 | /* strchr() does not work with multibyte strings if the locale encoding is |
| 164 | GB18030 and the character to be searched is a digit. */ |
| 165 | # undef strchr |
| 166 | # define strchr(s,c) \ |
| 167 | (GL_LINK_WARNING ("strchr cannot work correctly on character strings " \ |
| 168 | "in some multibyte locales - " \ |
| 169 | "use mbschr if you care about internationalization"), \ |
| 170 | strchr (s, c)) |
| 171 | #endif |
| 172 | |
| 173 | /* Find the first occurrence of C in S or the final NUL byte. */ |
| 174 | #if @GNULIB_STRCHRNUL@ |
| 175 | # if ! @HAVE_STRCHRNUL@ |
| 176 | extern char *strchrnul (char const *__s, int __c_in) |
| 177 | __attribute__ ((__pure__)); |
| 178 | # endif |
| 179 | #elif defined GNULIB_POSIXCHECK |
| 180 | # undef strchrnul |
| 181 | # define strchrnul(a,b) \ |
| 182 | (GL_LINK_WARNING ("strchrnul is unportable - " \ |
| 183 | "use gnulib module strchrnul for portability"), \ |
| 184 | strchrnul (a, b)) |
| 185 | #endif |
| 186 | |
| 187 | /* Duplicate S, returning an identical malloc'd string. */ |
| 188 | #if @GNULIB_STRDUP@ |
| 189 | # if @REPLACE_STRDUP@ |
| 190 | # undef strdup |
| 191 | # define strdup rpl_strdup |
| 192 | # endif |
| 193 | # if !(@HAVE_DECL_STRDUP@ || defined strdup) || @REPLACE_STRDUP@ |
| 194 | extern char *strdup (char const *__s); |
| 195 | # endif |
| 196 | #elif defined GNULIB_POSIXCHECK |
| 197 | # undef strdup |
| 198 | # define strdup(a) \ |
| 199 | (GL_LINK_WARNING ("strdup is unportable - " \ |
| 200 | "use gnulib module strdup for portability"), \ |
| 201 | strdup (a)) |
| 202 | #endif |
| 203 | |
| 204 | /* Return a newly allocated copy of at most N bytes of STRING. */ |
| 205 | #if @GNULIB_STRNDUP@ |
| 206 | # if @REPLACE_STRNDUP@ |
| 207 | # undef strndup |
| 208 | # define strndup rpl_strndup |
| 209 | # endif |
| 210 | # if @REPLACE_STRNDUP@ || ! @HAVE_DECL_STRNDUP@ |
| 211 | extern char *strndup (char const *__string, size_t __n); |
| 212 | # endif |
| 213 | #elif defined GNULIB_POSIXCHECK |
| 214 | # undef strndup |
| 215 | # define strndup(a,n) \ |
| 216 | (GL_LINK_WARNING ("strndup is unportable - " \ |
| 217 | "use gnulib module strndup for portability"), \ |
| 218 | strndup (a, n)) |
| 219 | #endif |
| 220 | |
| 221 | /* Find the length (number of bytes) of STRING, but scan at most |
| 222 | MAXLEN bytes. If no '\0' terminator is found in that many bytes, |
| 223 | return MAXLEN. */ |
| 224 | #if @GNULIB_STRNLEN@ |
| 225 | # if ! @HAVE_DECL_STRNLEN@ |
| 226 | extern size_t strnlen (char const *__string, size_t __maxlen) |
| 227 | __attribute__ ((__pure__)); |
| 228 | # endif |
| 229 | #elif defined GNULIB_POSIXCHECK |
| 230 | # undef strnlen |
| 231 | # define strnlen(a,n) \ |
| 232 | (GL_LINK_WARNING ("strnlen is unportable - " \ |
| 233 | "use gnulib module strnlen for portability"), \ |
| 234 | strnlen (a, n)) |
| 235 | #endif |
| 236 | |
| 237 | #if defined GNULIB_POSIXCHECK |
| 238 | /* strcspn() assumes the second argument is a list of single-byte characters. |
| 239 | Even in this simple case, it does not work with multibyte strings if the |
| 240 | locale encoding is GB18030 and one of the characters to be searched is a |
| 241 | digit. */ |
| 242 | # undef strcspn |
| 243 | # define strcspn(s,a) \ |
| 244 | (GL_LINK_WARNING ("strcspn cannot work correctly on character strings " \ |
| 245 | "in multibyte locales - " \ |
| 246 | "use mbscspn if you care about internationalization"), \ |
| 247 | strcspn (s, a)) |
| 248 | #endif |
| 249 | |
| 250 | /* Find the first occurrence in S of any character in ACCEPT. */ |
| 251 | #if @GNULIB_STRPBRK@ |
| 252 | # if ! @HAVE_STRPBRK@ |
| 253 | extern char *strpbrk (char const *__s, char const *__accept) |
| 254 | __attribute__ ((__pure__)); |
| 255 | # endif |
| 256 | # if defined GNULIB_POSIXCHECK |
| 257 | /* strpbrk() assumes the second argument is a list of single-byte characters. |
| 258 | Even in this simple case, it does not work with multibyte strings if the |
| 259 | locale encoding is GB18030 and one of the characters to be searched is a |
| 260 | digit. */ |
| 261 | # undef strpbrk |
| 262 | # define strpbrk(s,a) \ |
| 263 | (GL_LINK_WARNING ("strpbrk cannot work correctly on character strings " \ |
| 264 | "in multibyte locales - " \ |
| 265 | "use mbspbrk if you care about internationalization"), \ |
| 266 | strpbrk (s, a)) |
| 267 | # endif |
| 268 | #elif defined GNULIB_POSIXCHECK |
| 269 | # undef strpbrk |
| 270 | # define strpbrk(s,a) \ |
| 271 | (GL_LINK_WARNING ("strpbrk is unportable - " \ |
| 272 | "use gnulib module strpbrk for portability"), \ |
| 273 | strpbrk (s, a)) |
| 274 | #endif |
| 275 | |
| 276 | #if defined GNULIB_POSIXCHECK |
| 277 | /* strspn() assumes the second argument is a list of single-byte characters. |
| 278 | Even in this simple case, it cannot work with multibyte strings. */ |
| 279 | # undef strspn |
| 280 | # define strspn(s,a) \ |
| 281 | (GL_LINK_WARNING ("strspn cannot work correctly on character strings " \ |
| 282 | "in multibyte locales - " \ |
| 283 | "use mbsspn if you care about internationalization"), \ |
| 284 | strspn (s, a)) |
| 285 | #endif |
| 286 | |
| 287 | #if defined GNULIB_POSIXCHECK |
| 288 | /* strrchr() does not work with multibyte strings if the locale encoding is |
| 289 | GB18030 and the character to be searched is a digit. */ |
| 290 | # undef strrchr |
| 291 | # define strrchr(s,c) \ |
| 292 | (GL_LINK_WARNING ("strrchr cannot work correctly on character strings " \ |
| 293 | "in some multibyte locales - " \ |
| 294 | "use mbsrchr if you care about internationalization"), \ |
| 295 | strrchr (s, c)) |
| 296 | #endif |
| 297 | |
| 298 | /* Search the next delimiter (char listed in DELIM) starting at *STRINGP. |
| 299 | If one is found, overwrite it with a NUL, and advance *STRINGP |
| 300 | to point to the next char after it. Otherwise, set *STRINGP to NULL. |
| 301 | If *STRINGP was already NULL, nothing happens. |
| 302 | Return the old value of *STRINGP. |
| 303 | |
| 304 | This is a variant of strtok() that is multithread-safe and supports |
| 305 | empty fields. |
| 306 | |
| 307 | Caveat: It modifies the original string. |
| 308 | Caveat: These functions cannot be used on constant strings. |
| 309 | Caveat: The identity of the delimiting character is lost. |
| 310 | Caveat: It doesn't work with multibyte strings unless all of the delimiter |
| 311 | characters are ASCII characters < 0x30. |
| 312 | |
| 313 | See also strtok_r(). */ |
| 314 | #if @GNULIB_STRSEP@ |
| 315 | # if ! @HAVE_STRSEP@ |
| 316 | extern char *strsep (char **restrict __stringp, char const *restrict __delim); |
| 317 | # endif |
| 318 | # if defined GNULIB_POSIXCHECK |
| 319 | # undef strsep |
| 320 | # define strsep(s,d) \ |
| 321 | (GL_LINK_WARNING ("strsep cannot work correctly on character strings " \ |
| 322 | "in multibyte locales - " \ |
| 323 | "use mbssep if you care about internationalization"), \ |
| 324 | strsep (s, d)) |
| 325 | # endif |
| 326 | #elif defined GNULIB_POSIXCHECK |
| 327 | # undef strsep |
| 328 | # define strsep(s,d) \ |
| 329 | (GL_LINK_WARNING ("strsep is unportable - " \ |
| 330 | "use gnulib module strsep for portability"), \ |
| 331 | strsep (s, d)) |
| 332 | #endif |
| 333 | |
| 334 | #if @GNULIB_STRSTR@ |
| 335 | # if @REPLACE_STRSTR@ |
| 336 | # define strstr rpl_strstr |
| 337 | char *strstr (const char *haystack, const char *needle) |
| 338 | __attribute__ ((__pure__)); |
| 339 | # endif |
| 340 | #elif defined GNULIB_POSIXCHECK |
| 341 | /* strstr() does not work with multibyte strings if the locale encoding is |
| 342 | different from UTF-8: |
| 343 | POSIX says that it operates on "strings", and "string" in POSIX is defined |
| 344 | as a sequence of bytes, not of characters. */ |
| 345 | # undef strstr |
| 346 | # define strstr(a,b) \ |
| 347 | (GL_LINK_WARNING ("strstr is quadratic on many systems, and cannot " \ |
| 348 | "work correctly on character strings in most " \ |
| 349 | "multibyte locales - " \ |
| 350 | "use mbsstr if you care about internationalization, " \ |
| 351 | "or use strstr if you care about speed"), \ |
| 352 | strstr (a, b)) |
| 353 | #endif |
| 354 | |
| 355 | /* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive |
| 356 | comparison. */ |
| 357 | #if @GNULIB_STRCASESTR@ |
| 358 | # if @REPLACE_STRCASESTR@ |
| 359 | # define strcasestr rpl_strcasestr |
| 360 | # endif |
| 361 | # if ! @HAVE_STRCASESTR@ || @REPLACE_STRCASESTR@ |
| 362 | extern char *strcasestr (const char *haystack, const char *needle) |
| 363 | __attribute__ ((__pure__)); |
| 364 | # endif |
| 365 | #elif defined GNULIB_POSIXCHECK |
| 366 | /* strcasestr() does not work with multibyte strings: |
| 367 | It is a glibc extension, and glibc implements it only for unibyte |
| 368 | locales. */ |
| 369 | # undef strcasestr |
| 370 | # define strcasestr(a,b) \ |
| 371 | (GL_LINK_WARNING ("strcasestr does work correctly on character strings " \ |
| 372 | "in multibyte locales - " \ |
| 373 | "use mbscasestr if you care about " \ |
| 374 | "internationalization, or use c-strcasestr if you want " \ |
| 375 | "a locale independent function"), \ |
| 376 | strcasestr (a, b)) |
| 377 | #endif |
| 378 | |
| 379 | /* Parse S into tokens separated by characters in DELIM. |
| 380 | If S is NULL, the saved pointer in SAVE_PTR is used as |
| 381 | the next starting point. For example: |
| 382 | char s[] = "-abc-=-def"; |
| 383 | char *sp; |
| 384 | x = strtok_r(s, "-", &sp); // x = "abc", sp = "=-def" |
| 385 | x = strtok_r(NULL, "-=", &sp); // x = "def", sp = NULL |
| 386 | x = strtok_r(NULL, "=", &sp); // x = NULL |
| 387 | // s = "abc\0-def\0" |
| 388 | |
| 389 | This is a variant of strtok() that is multithread-safe. |
| 390 | |
| 391 | For the POSIX documentation for this function, see: |
| 392 | http://www.opengroup.org/susv3xsh/strtok.html |
| 393 | |
| 394 | Caveat: It modifies the original string. |
| 395 | Caveat: These functions cannot be used on constant strings. |
| 396 | Caveat: The identity of the delimiting character is lost. |
| 397 | Caveat: It doesn't work with multibyte strings unless all of the delimiter |
| 398 | characters are ASCII characters < 0x30. |
| 399 | |
| 400 | See also strsep(). */ |
| 401 | #if @GNULIB_STRTOK_R@ |
| 402 | # if @REPLACE_STRTOK_R@ |
| 403 | # undef strtok_r |
| 404 | # define strtok_r rpl_strtok_r |
| 405 | # elif @UNDEFINE_STRTOK_R@ |
| 406 | # undef strtok_r |
| 407 | # endif |
| 408 | # if ! @HAVE_DECL_STRTOK_R@ || @REPLACE_STRTOK_R@ |
| 409 | extern char *strtok_r (char *restrict s, char const *restrict delim, |
| 410 | char **restrict save_ptr); |
| 411 | # endif |
| 412 | # if defined GNULIB_POSIXCHECK |
| 413 | # undef strtok_r |
| 414 | # define strtok_r(s,d,p) \ |
| 415 | (GL_LINK_WARNING ("strtok_r cannot work correctly on character strings " \ |
| 416 | "in multibyte locales - " \ |
| 417 | "use mbstok_r if you care about internationalization"), \ |
| 418 | strtok_r (s, d, p)) |
| 419 | # endif |
| 420 | #elif defined GNULIB_POSIXCHECK |
| 421 | # undef strtok_r |
| 422 | # define strtok_r(s,d,p) \ |
| 423 | (GL_LINK_WARNING ("strtok_r is unportable - " \ |
| 424 | "use gnulib module strtok_r for portability"), \ |
| 425 | strtok_r (s, d, p)) |
| 426 | #endif |
| 427 | |
| 428 | |
| 429 | /* The following functions are not specified by POSIX. They are gnulib |
| 430 | extensions. */ |
| 431 | |
| 432 | #if @GNULIB_MBSLEN@ |
| 433 | /* Return the number of multibyte characters in the character string STRING. |
| 434 | This considers multibyte characters, unlike strlen, which counts bytes. */ |
| 435 | extern size_t mbslen (const char *string); |
| 436 | #endif |
| 437 | |
| 438 | #if @GNULIB_MBSNLEN@ |
| 439 | /* Return the number of multibyte characters in the character string starting |
| 440 | at STRING and ending at STRING + LEN. */ |
| 441 | extern size_t mbsnlen (const char *string, size_t len); |
| 442 | #endif |
| 443 | |
| 444 | #if @GNULIB_MBSCHR@ |
| 445 | /* Locate the first single-byte character C in the character string STRING, |
| 446 | and return a pointer to it. Return NULL if C is not found in STRING. |
| 447 | Unlike strchr(), this function works correctly in multibyte locales with |
| 448 | encodings such as GB18030. */ |
| 449 | # define mbschr rpl_mbschr /* avoid collision with HP-UX function */ |
| 450 | extern char * mbschr (const char *string, int c); |
| 451 | #endif |
| 452 | |
| 453 | #if @GNULIB_MBSRCHR@ |
| 454 | /* Locate the last single-byte character C in the character string STRING, |
| 455 | and return a pointer to it. Return NULL if C is not found in STRING. |
| 456 | Unlike strrchr(), this function works correctly in multibyte locales with |
| 457 | encodings such as GB18030. */ |
| 458 | # define mbsrchr rpl_mbsrchr /* avoid collision with HP-UX function */ |
| 459 | extern char * mbsrchr (const char *string, int c); |
| 460 | #endif |
| 461 | |
| 462 | #if @GNULIB_MBSSTR@ |
| 463 | /* Find the first occurrence of the character string NEEDLE in the character |
| 464 | string HAYSTACK. Return NULL if NEEDLE is not found in HAYSTACK. |
| 465 | Unlike strstr(), this function works correctly in multibyte locales with |
| 466 | encodings different from UTF-8. */ |
| 467 | extern char * mbsstr (const char *haystack, const char *needle); |
| 468 | #endif |
| 469 | |
| 470 | #if @GNULIB_MBSCASECMP@ |
| 471 | /* Compare the character strings S1 and S2, ignoring case, returning less than, |
| 472 | equal to or greater than zero if S1 is lexicographically less than, equal to |
| 473 | or greater than S2. |
| 474 | Note: This function may, in multibyte locales, return 0 for strings of |
| 475 | different lengths! |
| 476 | Unlike strcasecmp(), this function works correctly in multibyte locales. */ |
| 477 | extern int mbscasecmp (const char *s1, const char *s2); |
| 478 | #endif |
| 479 | |
| 480 | #if @GNULIB_MBSNCASECMP@ |
| 481 | /* Compare the initial segment of the character string S1 consisting of at most |
| 482 | N characters with the initial segment of the character string S2 consisting |
| 483 | of at most N characters, ignoring case, returning less than, equal to or |
| 484 | greater than zero if the initial segment of S1 is lexicographically less |
| 485 | than, equal to or greater than the initial segment of S2. |
| 486 | Note: This function may, in multibyte locales, return 0 for initial segments |
| 487 | of different lengths! |
| 488 | Unlike strncasecmp(), this function works correctly in multibyte locales. |
| 489 | But beware that N is not a byte count but a character count! */ |
| 490 | extern int mbsncasecmp (const char *s1, const char *s2, size_t n); |
| 491 | #endif |
| 492 | |
| 493 | #if @GNULIB_MBSPCASECMP@ |
| 494 | /* Compare the initial segment of the character string STRING consisting of |
| 495 | at most mbslen (PREFIX) characters with the character string PREFIX, |
| 496 | ignoring case, returning less than, equal to or greater than zero if this |
| 497 | initial segment is lexicographically less than, equal to or greater than |
| 498 | PREFIX. |
| 499 | Note: This function may, in multibyte locales, return 0 if STRING is of |
| 500 | smaller length than PREFIX! |
| 501 | Unlike strncasecmp(), this function works correctly in multibyte |
| 502 | locales. */ |
| 503 | extern char * mbspcasecmp (const char *string, const char *prefix); |
| 504 | #endif |
| 505 | |
| 506 | #if @GNULIB_MBSCASESTR@ |
| 507 | /* Find the first occurrence of the character string NEEDLE in the character |
| 508 | string HAYSTACK, using case-insensitive comparison. |
| 509 | Note: This function may, in multibyte locales, return success even if |
| 510 | strlen (haystack) < strlen (needle) ! |
| 511 | Unlike strcasestr(), this function works correctly in multibyte locales. */ |
| 512 | extern char * mbscasestr (const char *haystack, const char *needle); |
| 513 | #endif |
| 514 | |
| 515 | #if @GNULIB_MBSCSPN@ |
| 516 | /* Find the first occurrence in the character string STRING of any character |
| 517 | in the character string ACCEPT. Return the number of bytes from the |
| 518 | beginning of the string to this occurrence, or to the end of the string |
| 519 | if none exists. |
| 520 | Unlike strcspn(), this function works correctly in multibyte locales. */ |
| 521 | extern size_t mbscspn (const char *string, const char *accept); |
| 522 | #endif |
| 523 | |
| 524 | #if @GNULIB_MBSPBRK@ |
| 525 | /* Find the first occurrence in the character string STRING of any character |
| 526 | in the character string ACCEPT. Return the pointer to it, or NULL if none |
| 527 | exists. |
| 528 | Unlike strpbrk(), this function works correctly in multibyte locales. */ |
| 529 | # define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */ |
| 530 | extern char * mbspbrk (const char *string, const char *accept); |
| 531 | #endif |
| 532 | |
| 533 | #if @GNULIB_MBSSPN@ |
| 534 | /* Find the first occurrence in the character string STRING of any character |
| 535 | not in the character string REJECT. Return the number of bytes from the |
| 536 | beginning of the string to this occurrence, or to the end of the string |
| 537 | if none exists. |
| 538 | Unlike strspn(), this function works correctly in multibyte locales. */ |
| 539 | extern size_t mbsspn (const char *string, const char *reject); |
| 540 | #endif |
| 541 | |
| 542 | #if @GNULIB_MBSSEP@ |
| 543 | /* Search the next delimiter (multibyte character listed in the character |
| 544 | string DELIM) starting at the character string *STRINGP. |
| 545 | If one is found, overwrite it with a NUL, and advance *STRINGP to point |
| 546 | to the next multibyte character after it. Otherwise, set *STRINGP to NULL. |
| 547 | If *STRINGP was already NULL, nothing happens. |
| 548 | Return the old value of *STRINGP. |
| 549 | |
| 550 | This is a variant of mbstok_r() that supports empty fields. |
| 551 | |
| 552 | Caveat: It modifies the original string. |
| 553 | Caveat: These functions cannot be used on constant strings. |
| 554 | Caveat: The identity of the delimiting character is lost. |
| 555 | |
| 556 | See also mbstok_r(). */ |
| 557 | extern char * mbssep (char **stringp, const char *delim); |
| 558 | #endif |
| 559 | |
| 560 | #if @GNULIB_MBSTOK_R@ |
| 561 | /* Parse the character string STRING into tokens separated by characters in |
| 562 | the character string DELIM. |
| 563 | If STRING is NULL, the saved pointer in SAVE_PTR is used as |
| 564 | the next starting point. For example: |
| 565 | char s[] = "-abc-=-def"; |
| 566 | char *sp; |
| 567 | x = mbstok_r(s, "-", &sp); // x = "abc", sp = "=-def" |
| 568 | x = mbstok_r(NULL, "-=", &sp); // x = "def", sp = NULL |
| 569 | x = mbstok_r(NULL, "=", &sp); // x = NULL |
| 570 | // s = "abc\0-def\0" |
| 571 | |
| 572 | Caveat: It modifies the original string. |
| 573 | Caveat: These functions cannot be used on constant strings. |
| 574 | Caveat: The identity of the delimiting character is lost. |
| 575 | |
| 576 | See also mbssep(). */ |
| 577 | extern char * mbstok_r (char *string, const char *delim, char **save_ptr); |
| 578 | #endif |
| 579 | |
| 580 | /* Map any int, typically from errno, into an error message. */ |
| 581 | #if @GNULIB_STRERROR@ |
| 582 | # if @REPLACE_STRERROR@ |
| 583 | # undef strerror |
| 584 | # define strerror rpl_strerror |
| 585 | extern char *strerror (int); |
| 586 | # endif |
| 587 | #elif defined GNULIB_POSIXCHECK |
| 588 | # undef strerror |
| 589 | # define strerror(e) \ |
| 590 | (GL_LINK_WARNING ("strerror is unportable - " \ |
| 591 | "use gnulib module strerror to guarantee non-NULL result"), \ |
| 592 | strerror (e)) |
| 593 | #endif |
| 594 | |
| 595 | #if @GNULIB_STRSIGNAL@ |
| 596 | # if @REPLACE_STRSIGNAL@ |
| 597 | # define strsignal rpl_strsignal |
| 598 | # endif |
| 599 | # if ! @HAVE_DECL_STRSIGNAL@ || @REPLACE_STRSIGNAL@ |
| 600 | extern char *strsignal (int __sig); |
| 601 | # endif |
| 602 | #elif defined GNULIB_POSIXCHECK |
| 603 | # undef strsignal |
| 604 | # define strsignal(a) \ |
| 605 | (GL_LINK_WARNING ("strsignal is unportable - " \ |
| 606 | "use gnulib module strsignal for portability"), \ |
| 607 | strsignal (a)) |
| 608 | #endif |
| 609 | |
| 610 | #if @GNULIB_STRVERSCMP@ |
| 611 | # if !@HAVE_STRVERSCMP@ |
| 612 | extern int strverscmp (const char *, const char *); |
| 613 | # endif |
| 614 | #elif defined GNULIB_POSIXCHECK |
| 615 | # undef strverscmp |
| 616 | # define strverscmp(a, b) \ |
| 617 | (GL_LINK_WARNING ("strverscmp is unportable - " \ |
| 618 | "use gnulib module strverscmp for portability"), \ |
| 619 | strverscmp (a, b)) |
| 620 | #endif |
| 621 | |
| 622 | |
| 623 | #ifdef __cplusplus |
| 624 | } |
| 625 | #endif |
| 626 | |
| 627 | #endif /* _GL_STRING_H */ |
| 628 | #endif /* _GL_STRING_H */ |