1 /* A GNU-like <string.h>.
3 Copyright (C) 1995-1996, 2001-2010 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
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 General Public License for more details.
15 You should have received a copy of the GNU 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. */
22 @PRAGMA_SYSTEM_HEADER@
25 /* The include_next requires a split double-inclusion guard. */
26 #@INCLUDE_NEXT@ @NEXT_STRING_H@
31 /* NetBSD 5.0 mis-defines NULL. */
34 /* MirBSD defines mbslen as a macro. */
35 #if @GNULIB_MBSLEN@ && defined __MirBSD__
40 /* This feature is available in gcc versions 2.5 and later. */
41 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
42 # define __attribute__(Spec) /* empty */
44 /* The attribute __pure__ was added in gcc 2.96. */
45 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
46 # define __pure__ /* empty */
51 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
53 /* The definition of _GL_ARG_NONNULL is copied here. */
55 /* The definition of _GL_WARN_ON_USE is copied here. */
58 /* Return the first instance of C within N bytes of S, or NULL. */
61 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
62 # define memchr rpl_memchr
64 _GL_FUNCDECL_RPL (memchr, void *, (void const *__s, int __c, size_t __n)
65 __attribute__ ((__pure__))
66 _GL_ARG_NONNULL ((1)));
67 _GL_CXXALIAS_RPL (memchr, void *, (void const *__s, int __c, size_t __n));
70 _GL_FUNCDECL_SYS (memchr, void *, (void const *__s, int __c, size_t __n)
71 __attribute__ ((__pure__))
72 _GL_ARG_NONNULL ((1)));
74 /* On some systems, this function is defined as an overloaded function:
75 extern "C" { const void * std::memchr (const void *, int, size_t); }
76 extern "C++" { void * std::memchr (void *, int, size_t); } */
77 _GL_CXXALIAS_SYS_CAST2 (memchr,
78 void *, (void const *__s, int __c, size_t __n),
79 void const *, (void const *__s, int __c, size_t __n));
81 # if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
82 && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
83 _GL_CXXALIASWARN1 (memchr, void *, (void *__s, int __c, size_t __n));
84 _GL_CXXALIASWARN1 (memchr, void const *,
85 (void const *__s, int __c, size_t __n));
87 _GL_CXXALIASWARN (memchr);
89 #elif defined GNULIB_POSIXCHECK
91 /* Assume memchr is always declared. */
92 _GL_WARN_ON_USE (memchr, "memchr has platform-specific bugs - "
93 "use gnulib module memchr for portability" );
96 /* Return the first occurrence of NEEDLE in HAYSTACK. */
99 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
100 # define memmem rpl_memmem
102 _GL_FUNCDECL_RPL (memmem, void *,
103 (void const *__haystack, size_t __haystack_len,
104 void const *__needle, size_t __needle_len)
105 __attribute__ ((__pure__)) _GL_ARG_NONNULL ((1, 3)));
106 _GL_CXXALIAS_RPL (memmem, void *,
107 (void const *__haystack, size_t __haystack_len,
108 void const *__needle, size_t __needle_len));
110 # if ! @HAVE_DECL_MEMMEM@
111 _GL_FUNCDECL_SYS (memmem, void *,
112 (void const *__haystack, size_t __haystack_len,
113 void const *__needle, size_t __needle_len)
114 __attribute__ ((__pure__)) _GL_ARG_NONNULL ((1, 3)));
116 _GL_CXXALIAS_SYS (memmem, void *,
117 (void const *__haystack, size_t __haystack_len,
118 void const *__needle, size_t __needle_len));
120 _GL_CXXALIASWARN (memmem);
121 #elif defined GNULIB_POSIXCHECK
123 # if HAVE_RAW_DECL_MEMMEM
124 _GL_WARN_ON_USE (memmem, "memmem is unportable and often quadratic - "
125 "use gnulib module memmem-simple for portability, "
126 "and module memmem for speed" );
130 /* Copy N bytes of SRC to DEST, return pointer to bytes after the
131 last written byte. */
133 # if ! @HAVE_MEMPCPY@
134 _GL_FUNCDECL_SYS (mempcpy, void *,
135 (void *restrict __dest, void const *restrict __src,
137 _GL_ARG_NONNULL ((1, 2)));
139 _GL_CXXALIAS_SYS (mempcpy, void *,
140 (void *restrict __dest, void const *restrict __src,
142 _GL_CXXALIASWARN (mempcpy);
143 #elif defined GNULIB_POSIXCHECK
145 # if HAVE_RAW_DECL_MEMPCPY
146 _GL_WARN_ON_USE (mempcpy, "mempcpy is unportable - "
147 "use gnulib module mempcpy for portability");
151 /* Search backwards through a block for a byte (specified as an int). */
153 # if ! @HAVE_DECL_MEMRCHR@
154 _GL_FUNCDECL_SYS (memrchr, void *, (void const *, int, size_t)
155 __attribute__ ((__pure__))
156 _GL_ARG_NONNULL ((1)));
158 /* On some systems, this function is defined as an overloaded function:
159 extern "C++" { const void * std::memrchr (const void *, int, size_t); }
160 extern "C++" { void * std::memrchr (void *, int, size_t); } */
161 _GL_CXXALIAS_SYS_CAST2 (memrchr,
162 void *, (void const *, int, size_t),
163 void const *, (void const *, int, size_t));
164 # if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
165 && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
166 _GL_CXXALIASWARN1 (memrchr, void *, (void *, int, size_t));
167 _GL_CXXALIASWARN1 (memrchr, void const *, (void const *, int, size_t));
169 _GL_CXXALIASWARN (memrchr);
171 #elif defined GNULIB_POSIXCHECK
173 # if HAVE_RAW_DECL_MEMRCHR
174 _GL_WARN_ON_USE (memrchr, "memrchr is unportable - "
175 "use gnulib module memrchr for portability");
179 /* Find the first occurrence of C in S. More efficient than
180 memchr(S,C,N), at the expense of undefined behavior if C does not
181 occur within N bytes. */
182 #if @GNULIB_RAWMEMCHR@
183 # if ! @HAVE_RAWMEMCHR@
184 _GL_FUNCDECL_SYS (rawmemchr, void *, (void const *__s, int __c_in)
185 __attribute__ ((__pure__))
186 _GL_ARG_NONNULL ((1)));
188 /* On some systems, this function is defined as an overloaded function:
189 extern "C++" { const void * std::rawmemchr (const void *, int); }
190 extern "C++" { void * std::rawmemchr (void *, int); } */
191 _GL_CXXALIAS_SYS_CAST2 (rawmemchr,
192 void *, (void const *__s, int __c_in),
193 void const *, (void const *__s, int __c_in));
194 # if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
195 && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
196 _GL_CXXALIASWARN1 (rawmemchr, void *, (void *__s, int __c_in));
197 _GL_CXXALIASWARN1 (rawmemchr, void const *, (void const *__s, int __c_in));
199 _GL_CXXALIASWARN (rawmemchr);
201 #elif defined GNULIB_POSIXCHECK
203 # if HAVE_RAW_DECL_RAWMEMCHR
204 _GL_WARN_ON_USE (rawmemchr, "rawmemchr is unportable - "
205 "use gnulib module rawmemchr for portability");
209 /* Copy SRC to DST, returning the address of the terminating '\0' in DST. */
212 _GL_FUNCDECL_SYS (stpcpy, char *,
213 (char *restrict __dst, char const *restrict __src)
214 _GL_ARG_NONNULL ((1, 2)));
216 _GL_CXXALIAS_SYS (stpcpy, char *,
217 (char *restrict __dst, char const *restrict __src));
218 _GL_CXXALIASWARN (stpcpy);
219 #elif defined GNULIB_POSIXCHECK
221 # if HAVE_RAW_DECL_STPCPY
222 _GL_WARN_ON_USE (stpcpy, "stpcpy is unportable - "
223 "use gnulib module stpcpy for portability");
227 /* Copy no more than N bytes of SRC to DST, returning a pointer past the
228 last non-NUL byte written into DST. */
230 # if @REPLACE_STPNCPY@
231 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
232 # define stpncpy rpl_stpncpy
234 _GL_FUNCDECL_RPL (stpncpy, char *,
235 (char *restrict __dst, char const *restrict __src,
237 _GL_ARG_NONNULL ((1, 2)));
238 _GL_CXXALIAS_RPL (stpncpy, char *,
239 (char *restrict __dst, char const *restrict __src,
242 # if ! @HAVE_STPNCPY@
243 _GL_FUNCDECL_SYS (stpncpy, char *,
244 (char *restrict __dst, char const *restrict __src,
246 _GL_ARG_NONNULL ((1, 2)));
248 _GL_CXXALIAS_SYS (stpncpy, char *,
249 (char *restrict __dst, char const *restrict __src,
252 _GL_CXXALIASWARN (stpncpy);
253 #elif defined GNULIB_POSIXCHECK
255 # if HAVE_RAW_DECL_STPNCPY
256 _GL_WARN_ON_USE (stpncpy, "stpncpy is unportable - "
257 "use gnulib module stpncpy for portability");
261 #if defined GNULIB_POSIXCHECK
262 /* strchr() does not work with multibyte strings if the locale encoding is
263 GB18030 and the character to be searched is a digit. */
265 /* Assume strchr is always declared. */
266 _GL_WARN_ON_USE (strchr, "strchr cannot work correctly on character strings "
267 "in some multibyte locales - "
268 "use mbschr if you care about internationalization");
271 /* Find the first occurrence of C in S or the final NUL byte. */
272 #if @GNULIB_STRCHRNUL@
273 # if ! @HAVE_STRCHRNUL@
274 _GL_FUNCDECL_SYS (strchrnul, char *, (char const *__s, int __c_in)
275 __attribute__ ((__pure__))
276 _GL_ARG_NONNULL ((1)));
278 /* On some systems, this function is defined as an overloaded function:
279 extern "C++" { const char * std::strchrnul (const char *, int); }
280 extern "C++" { char * std::strchrnul (char *, int); } */
281 _GL_CXXALIAS_SYS_CAST2 (strchrnul,
282 char *, (char const *__s, int __c_in),
283 char const *, (char const *__s, int __c_in));
284 # if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
285 && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
286 _GL_CXXALIASWARN1 (strchrnul, char *, (char *__s, int __c_in));
287 _GL_CXXALIASWARN1 (strchrnul, char const *, (char const *__s, int __c_in));
289 _GL_CXXALIASWARN (strchrnul);
291 #elif defined GNULIB_POSIXCHECK
293 # if HAVE_RAW_DECL_STRCHRNUL
294 _GL_WARN_ON_USE (strchrnul, "strchrnul is unportable - "
295 "use gnulib module strchrnul for portability");
299 /* Duplicate S, returning an identical malloc'd string. */
301 # if @REPLACE_STRDUP@
302 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
304 # define strdup rpl_strdup
306 _GL_FUNCDECL_RPL (strdup, char *, (char const *__s) _GL_ARG_NONNULL ((1)));
307 _GL_CXXALIAS_RPL (strdup, char *, (char const *__s));
309 # if !(@HAVE_DECL_STRDUP@ || defined strdup)
310 _GL_FUNCDECL_SYS (strdup, char *, (char const *__s) _GL_ARG_NONNULL ((1)));
312 _GL_CXXALIAS_SYS (strdup, char *, (char const *__s));
314 _GL_CXXALIASWARN (strdup);
315 #elif defined GNULIB_POSIXCHECK
317 # if HAVE_RAW_DECL_STRDUP
318 _GL_WARN_ON_USE (strdup, "strdup is unportable - "
319 "use gnulib module strdup for portability");
323 /* Return a newly allocated copy of at most N bytes of STRING. */
325 # if @REPLACE_STRNDUP@
326 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
328 # define strndup rpl_strndup
330 _GL_FUNCDECL_RPL (strndup, char *, (char const *__string, size_t __n)
331 _GL_ARG_NONNULL ((1)));
332 _GL_CXXALIAS_RPL (strndup, char *, (char const *__string, size_t __n));
334 # if ! @HAVE_DECL_STRNDUP@
335 _GL_FUNCDECL_SYS (strndup, char *, (char const *__string, size_t __n)
336 _GL_ARG_NONNULL ((1)));
338 _GL_CXXALIAS_SYS (strndup, char *, (char const *__string, size_t __n));
340 _GL_CXXALIASWARN (strndup);
341 #elif defined GNULIB_POSIXCHECK
343 # if HAVE_RAW_DECL_STRNDUP
344 _GL_WARN_ON_USE (strndup, "strndup is unportable - "
345 "use gnulib module strndup for portability");
349 /* Find the length (number of bytes) of STRING, but scan at most
350 MAXLEN bytes. If no '\0' terminator is found in that many bytes,
353 # if ! @HAVE_DECL_STRNLEN@
354 _GL_FUNCDECL_SYS (strnlen, size_t, (char const *__string, size_t __maxlen)
355 __attribute__ ((__pure__))
356 _GL_ARG_NONNULL ((1)));
358 _GL_CXXALIAS_SYS (strnlen, size_t, (char const *__string, size_t __maxlen));
359 _GL_CXXALIASWARN (strnlen);
360 #elif defined GNULIB_POSIXCHECK
362 # if HAVE_RAW_DECL_STRNLEN
363 _GL_WARN_ON_USE (strnlen, "strnlen is unportable - "
364 "use gnulib module strnlen for portability");
368 #if defined GNULIB_POSIXCHECK
369 /* strcspn() assumes the second argument is a list of single-byte characters.
370 Even in this simple case, it does not work with multibyte strings if the
371 locale encoding is GB18030 and one of the characters to be searched is a
374 /* Assume strcspn is always declared. */
375 _GL_WARN_ON_USE (strcspn, "strcspn cannot work correctly on character strings "
376 "in multibyte locales - "
377 "use mbscspn if you care about internationalization");
380 /* Find the first occurrence in S of any character in ACCEPT. */
382 # if ! @HAVE_STRPBRK@
383 _GL_FUNCDECL_SYS (strpbrk, char *, (char const *__s, char const *__accept)
384 __attribute__ ((__pure__))
385 _GL_ARG_NONNULL ((1, 2)));
387 /* On some systems, this function is defined as an overloaded function:
388 extern "C" { const char * strpbrk (const char *, const char *); }
389 extern "C++" { char * strpbrk (char *, const char *); } */
390 _GL_CXXALIAS_SYS_CAST2 (strpbrk,
391 char *, (char const *__s, char const *__accept),
392 const char *, (char const *__s, char const *__accept));
393 # if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
394 && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
395 _GL_CXXALIASWARN1 (strpbrk, char *, (char *__s, char const *__accept));
396 _GL_CXXALIASWARN1 (strpbrk, char const *,
397 (char const *__s, char const *__accept));
399 _GL_CXXALIASWARN (strpbrk);
401 # if defined GNULIB_POSIXCHECK
402 /* strpbrk() assumes the second argument is a list of single-byte characters.
403 Even in this simple case, it does not work with multibyte strings if the
404 locale encoding is GB18030 and one of the characters to be searched is a
407 _GL_WARN_ON_USE (strpbrk, "strpbrk cannot work correctly on character strings "
408 "in multibyte locales - "
409 "use mbspbrk if you care about internationalization");
411 #elif defined GNULIB_POSIXCHECK
413 # if HAVE_RAW_DECL_STRPBRK
414 _GL_WARN_ON_USE (strpbrk, "strpbrk is unportable - "
415 "use gnulib module strpbrk for portability");
419 #if defined GNULIB_POSIXCHECK
420 /* strspn() assumes the second argument is a list of single-byte characters.
421 Even in this simple case, it cannot work with multibyte strings. */
423 /* Assume strspn is always declared. */
424 _GL_WARN_ON_USE (strspn, "strspn cannot work correctly on character strings "
425 "in multibyte locales - "
426 "use mbsspn if you care about internationalization");
429 #if defined GNULIB_POSIXCHECK
430 /* strrchr() does not work with multibyte strings if the locale encoding is
431 GB18030 and the character to be searched is a digit. */
433 /* Assume strrchr is always declared. */
434 _GL_WARN_ON_USE (strrchr, "strrchr cannot work correctly on character strings "
435 "in some multibyte locales - "
436 "use mbsrchr if you care about internationalization");
439 /* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
440 If one is found, overwrite it with a NUL, and advance *STRINGP
441 to point to the next char after it. Otherwise, set *STRINGP to NULL.
442 If *STRINGP was already NULL, nothing happens.
443 Return the old value of *STRINGP.
445 This is a variant of strtok() that is multithread-safe and supports
448 Caveat: It modifies the original string.
449 Caveat: These functions cannot be used on constant strings.
450 Caveat: The identity of the delimiting character is lost.
451 Caveat: It doesn't work with multibyte strings unless all of the delimiter
452 characters are ASCII characters < 0x30.
454 See also strtok_r(). */
457 _GL_FUNCDECL_SYS (strsep, char *,
458 (char **restrict __stringp, char const *restrict __delim)
459 _GL_ARG_NONNULL ((1, 2)));
461 _GL_CXXALIAS_SYS (strsep, char *,
462 (char **restrict __stringp, char const *restrict __delim));
463 _GL_CXXALIASWARN (strsep);
464 # if defined GNULIB_POSIXCHECK
466 _GL_WARN_ON_USE (strsep, "strsep cannot work correctly on character strings "
467 "in multibyte locales - "
468 "use mbssep if you care about internationalization");
470 #elif defined GNULIB_POSIXCHECK
472 # if HAVE_RAW_DECL_STRSEP
473 _GL_WARN_ON_USE (strsep, "strsep is unportable - "
474 "use gnulib module strsep for portability");
479 # if @REPLACE_STRSTR@
480 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
481 # define strstr rpl_strstr
483 _GL_FUNCDECL_RPL (strstr, char *, (const char *haystack, const char *needle)
484 __attribute__ ((__pure__))
485 _GL_ARG_NONNULL ((1, 2)));
486 _GL_CXXALIAS_RPL (strstr, char *, (const char *haystack, const char *needle));
488 /* On some systems, this function is defined as an overloaded function:
489 extern "C++" { const char * strstr (const char *, const char *); }
490 extern "C++" { char * strstr (char *, const char *); } */
491 _GL_CXXALIAS_SYS_CAST2 (strstr,
492 char *, (const char *haystack, const char *needle),
493 const char *, (const char *haystack, const char *needle));
495 # if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
496 && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
497 _GL_CXXALIASWARN1 (strstr, char *, (char *haystack, const char *needle));
498 _GL_CXXALIASWARN1 (strstr, const char *,
499 (const char *haystack, const char *needle));
501 _GL_CXXALIASWARN (strstr);
503 #elif defined GNULIB_POSIXCHECK
504 /* strstr() does not work with multibyte strings if the locale encoding is
505 different from UTF-8:
506 POSIX says that it operates on "strings", and "string" in POSIX is defined
507 as a sequence of bytes, not of characters. */
509 /* Assume strstr is always declared. */
510 _GL_WARN_ON_USE (strstr, "strstr is quadratic on many systems, and cannot "
511 "work correctly on character strings in most "
512 "multibyte locales - "
513 "use mbsstr if you care about internationalization, "
514 "or use strstr if you care about speed");
517 /* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
519 #if @GNULIB_STRCASESTR@
520 # if @REPLACE_STRCASESTR@
521 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
522 # define strcasestr rpl_strcasestr
524 _GL_FUNCDECL_RPL (strcasestr, char *,
525 (const char *haystack, const char *needle)
526 __attribute__ ((__pure__)) _GL_ARG_NONNULL ((1, 2)));
527 _GL_CXXALIAS_RPL (strcasestr, char *,
528 (const char *haystack, const char *needle));
530 # if ! @HAVE_STRCASESTR@
531 _GL_FUNCDECL_SYS (strcasestr, char *,
532 (const char *haystack, const char *needle)
533 __attribute__ ((__pure__)) _GL_ARG_NONNULL ((1, 2)));
535 /* On some systems, this function is defined as an overloaded function:
536 extern "C++" { const char * strcasestr (const char *, const char *); }
537 extern "C++" { char * strcasestr (char *, const char *); } */
538 _GL_CXXALIAS_SYS_CAST2 (strcasestr,
539 char *, (const char *haystack, const char *needle),
540 const char *, (const char *haystack, const char *needle));
542 # if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
543 && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
544 _GL_CXXALIASWARN1 (strcasestr, char *, (char *haystack, const char *needle));
545 _GL_CXXALIASWARN1 (strcasestr, const char *,
546 (const char *haystack, const char *needle));
548 _GL_CXXALIASWARN (strcasestr);
550 #elif defined GNULIB_POSIXCHECK
551 /* strcasestr() does not work with multibyte strings:
552 It is a glibc extension, and glibc implements it only for unibyte
555 # if HAVE_RAW_DECL_STRCASESTR
556 _GL_WARN_ON_USE (strcasestr, "strcasestr does work correctly on character "
557 "strings in multibyte locales - "
558 "use mbscasestr if you care about "
559 "internationalization, or use c-strcasestr if you want "
560 "a locale independent function");
564 /* Parse S into tokens separated by characters in DELIM.
565 If S is NULL, the saved pointer in SAVE_PTR is used as
566 the next starting point. For example:
567 char s[] = "-abc-=-def";
569 x = strtok_r(s, "-", &sp); // x = "abc", sp = "=-def"
570 x = strtok_r(NULL, "-=", &sp); // x = "def", sp = NULL
571 x = strtok_r(NULL, "=", &sp); // x = NULL
574 This is a variant of strtok() that is multithread-safe.
576 For the POSIX documentation for this function, see:
577 http://www.opengroup.org/susv3xsh/strtok.html
579 Caveat: It modifies the original string.
580 Caveat: These functions cannot be used on constant strings.
581 Caveat: The identity of the delimiting character is lost.
582 Caveat: It doesn't work with multibyte strings unless all of the delimiter
583 characters are ASCII characters < 0x30.
585 See also strsep(). */
586 #if @GNULIB_STRTOK_R@
587 # if @REPLACE_STRTOK_R@
588 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
590 # define strtok_r rpl_strtok_r
592 _GL_FUNCDECL_RPL (strtok_r, char *,
593 (char *restrict s, char const *restrict delim,
594 char **restrict save_ptr)
595 _GL_ARG_NONNULL ((2, 3)));
596 _GL_CXXALIAS_RPL (strtok_r, char *,
597 (char *restrict s, char const *restrict delim,
598 char **restrict save_ptr));
600 # if @UNDEFINE_STRTOK_R@ || defined GNULIB_POSIXCHECK
603 # if ! @HAVE_DECL_STRTOK_R@
604 _GL_FUNCDECL_SYS (strtok_r, char *,
605 (char *restrict s, char const *restrict delim,
606 char **restrict save_ptr)
607 _GL_ARG_NONNULL ((2, 3)));
609 _GL_CXXALIAS_SYS (strtok_r, char *,
610 (char *restrict s, char const *restrict delim,
611 char **restrict save_ptr));
613 _GL_CXXALIASWARN (strtok_r);
614 # if defined GNULIB_POSIXCHECK
615 _GL_WARN_ON_USE (strtok_r, "strtok_r cannot work correctly on character "
616 "strings in multibyte locales - "
617 "use mbstok_r if you care about internationalization");
619 #elif defined GNULIB_POSIXCHECK
621 # if HAVE_RAW_DECL_STRTOK_R
622 _GL_WARN_ON_USE (strtok_r, "strtok_r is unportable - "
623 "use gnulib module strtok_r for portability");
628 /* The following functions are not specified by POSIX. They are gnulib
632 /* Return the number of multibyte characters in the character string STRING.
633 This considers multibyte characters, unlike strlen, which counts bytes. */
634 # ifdef __MirBSD__ /* MirBSD defines mbslen as a macro. Override it. */
637 # if @HAVE_MBSLEN@ /* AIX, OSF/1, MirBSD define mbslen already in libc. */
638 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
639 # define mbslen rpl_mbslen
641 _GL_FUNCDECL_RPL (mbslen, size_t, (const char *string) _GL_ARG_NONNULL ((1)));
642 _GL_CXXALIAS_RPL (mbslen, size_t, (const char *string));
644 _GL_FUNCDECL_SYS (mbslen, size_t, (const char *string) _GL_ARG_NONNULL ((1)));
645 _GL_CXXALIAS_SYS (mbslen, size_t, (const char *string));
647 _GL_CXXALIASWARN (mbslen);
651 /* Return the number of multibyte characters in the character string starting
652 at STRING and ending at STRING + LEN. */
653 _GL_EXTERN_C size_t mbsnlen (const char *string, size_t len)
654 _GL_ARG_NONNULL ((1));
658 /* Locate the first single-byte character C in the character string STRING,
659 and return a pointer to it. Return NULL if C is not found in STRING.
660 Unlike strchr(), this function works correctly in multibyte locales with
661 encodings such as GB18030. */
663 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
664 # define mbschr rpl_mbschr /* avoid collision with HP-UX function */
666 _GL_FUNCDECL_RPL (mbschr, char *, (const char *string, int c)
667 _GL_ARG_NONNULL ((1)));
668 _GL_CXXALIAS_RPL (mbschr, char *, (const char *string, int c));
670 _GL_FUNCDECL_SYS (mbschr, char *, (const char *string, int c)
671 _GL_ARG_NONNULL ((1)));
672 _GL_CXXALIAS_SYS (mbschr, char *, (const char *string, int c));
674 _GL_CXXALIASWARN (mbschr);
678 /* Locate the last single-byte character C in the character string STRING,
679 and return a pointer to it. Return NULL if C is not found in STRING.
680 Unlike strrchr(), this function works correctly in multibyte locales with
681 encodings such as GB18030. */
683 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
684 # define mbsrchr rpl_mbsrchr /* avoid collision with HP-UX function */
686 _GL_FUNCDECL_RPL (mbsrchr, char *, (const char *string, int c)
687 _GL_ARG_NONNULL ((1)));
688 _GL_CXXALIAS_RPL (mbsrchr, char *, (const char *string, int c));
690 _GL_FUNCDECL_SYS (mbsrchr, char *, (const char *string, int c)
691 _GL_ARG_NONNULL ((1)));
692 _GL_CXXALIAS_SYS (mbsrchr, char *, (const char *string, int c));
694 _GL_CXXALIASWARN (mbsrchr);
698 /* Find the first occurrence of the character string NEEDLE in the character
699 string HAYSTACK. Return NULL if NEEDLE is not found in HAYSTACK.
700 Unlike strstr(), this function works correctly in multibyte locales with
701 encodings different from UTF-8. */
702 _GL_EXTERN_C char * mbsstr (const char *haystack, const char *needle)
703 _GL_ARG_NONNULL ((1, 2));
706 #if @GNULIB_MBSCASECMP@
707 /* Compare the character strings S1 and S2, ignoring case, returning less than,
708 equal to or greater than zero if S1 is lexicographically less than, equal to
710 Note: This function may, in multibyte locales, return 0 for strings of
712 Unlike strcasecmp(), this function works correctly in multibyte locales. */
713 _GL_EXTERN_C int mbscasecmp (const char *s1, const char *s2)
714 _GL_ARG_NONNULL ((1, 2));
717 #if @GNULIB_MBSNCASECMP@
718 /* Compare the initial segment of the character string S1 consisting of at most
719 N characters with the initial segment of the character string S2 consisting
720 of at most N characters, ignoring case, returning less than, equal to or
721 greater than zero if the initial segment of S1 is lexicographically less
722 than, equal to or greater than the initial segment of S2.
723 Note: This function may, in multibyte locales, return 0 for initial segments
724 of different lengths!
725 Unlike strncasecmp(), this function works correctly in multibyte locales.
726 But beware that N is not a byte count but a character count! */
727 _GL_EXTERN_C int mbsncasecmp (const char *s1, const char *s2, size_t n)
728 _GL_ARG_NONNULL ((1, 2));
731 #if @GNULIB_MBSPCASECMP@
732 /* Compare the initial segment of the character string STRING consisting of
733 at most mbslen (PREFIX) characters with the character string PREFIX,
734 ignoring case, returning less than, equal to or greater than zero if this
735 initial segment is lexicographically less than, equal to or greater than
737 Note: This function may, in multibyte locales, return 0 if STRING is of
738 smaller length than PREFIX!
739 Unlike strncasecmp(), this function works correctly in multibyte
741 _GL_EXTERN_C char * mbspcasecmp (const char *string, const char *prefix)
742 _GL_ARG_NONNULL ((1, 2));
745 #if @GNULIB_MBSCASESTR@
746 /* Find the first occurrence of the character string NEEDLE in the character
747 string HAYSTACK, using case-insensitive comparison.
748 Note: This function may, in multibyte locales, return success even if
749 strlen (haystack) < strlen (needle) !
750 Unlike strcasestr(), this function works correctly in multibyte locales. */
751 _GL_EXTERN_C char * mbscasestr (const char *haystack, const char *needle)
752 _GL_ARG_NONNULL ((1, 2));
756 /* Find the first occurrence in the character string STRING of any character
757 in the character string ACCEPT. Return the number of bytes from the
758 beginning of the string to this occurrence, or to the end of the string
760 Unlike strcspn(), this function works correctly in multibyte locales. */
761 _GL_EXTERN_C size_t mbscspn (const char *string, const char *accept)
762 _GL_ARG_NONNULL ((1, 2));
766 /* Find the first occurrence in the character string STRING of any character
767 in the character string ACCEPT. Return the pointer to it, or NULL if none
769 Unlike strpbrk(), this function works correctly in multibyte locales. */
771 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
772 # define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */
774 _GL_FUNCDECL_RPL (mbspbrk, char *, (const char *string, const char *accept)
775 _GL_ARG_NONNULL ((1, 2)));
776 _GL_CXXALIAS_RPL (mbspbrk, char *, (const char *string, const char *accept));
778 _GL_FUNCDECL_SYS (mbspbrk, char *, (const char *string, const char *accept)
779 _GL_ARG_NONNULL ((1, 2)));
780 _GL_CXXALIAS_SYS (mbspbrk, char *, (const char *string, const char *accept));
782 _GL_CXXALIASWARN (mbspbrk);
786 /* Find the first occurrence in the character string STRING of any character
787 not in the character string REJECT. Return the number of bytes from the
788 beginning of the string to this occurrence, or to the end of the string
790 Unlike strspn(), this function works correctly in multibyte locales. */
791 _GL_EXTERN_C size_t mbsspn (const char *string, const char *reject)
792 _GL_ARG_NONNULL ((1, 2));
796 /* Search the next delimiter (multibyte character listed in the character
797 string DELIM) starting at the character string *STRINGP.
798 If one is found, overwrite it with a NUL, and advance *STRINGP to point
799 to the next multibyte character after it. Otherwise, set *STRINGP to NULL.
800 If *STRINGP was already NULL, nothing happens.
801 Return the old value of *STRINGP.
803 This is a variant of mbstok_r() that supports empty fields.
805 Caveat: It modifies the original string.
806 Caveat: These functions cannot be used on constant strings.
807 Caveat: The identity of the delimiting character is lost.
809 See also mbstok_r(). */
810 _GL_EXTERN_C char * mbssep (char **stringp, const char *delim)
811 _GL_ARG_NONNULL ((1, 2));
814 #if @GNULIB_MBSTOK_R@
815 /* Parse the character string STRING into tokens separated by characters in
816 the character string DELIM.
817 If STRING is NULL, the saved pointer in SAVE_PTR is used as
818 the next starting point. For example:
819 char s[] = "-abc-=-def";
821 x = mbstok_r(s, "-", &sp); // x = "abc", sp = "=-def"
822 x = mbstok_r(NULL, "-=", &sp); // x = "def", sp = NULL
823 x = mbstok_r(NULL, "=", &sp); // x = NULL
826 Caveat: It modifies the original string.
827 Caveat: These functions cannot be used on constant strings.
828 Caveat: The identity of the delimiting character is lost.
830 See also mbssep(). */
831 _GL_EXTERN_C char * mbstok_r (char *string, const char *delim, char **save_ptr)
832 _GL_ARG_NONNULL ((2, 3));
835 /* Map any int, typically from errno, into an error message. */
836 #if @GNULIB_STRERROR@
837 # if @REPLACE_STRERROR@
838 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
840 # define strerror rpl_strerror
842 _GL_FUNCDECL_RPL (strerror, char *, (int));
843 _GL_CXXALIAS_RPL (strerror, char *, (int));
845 _GL_CXXALIAS_SYS (strerror, char *, (int));
847 _GL_CXXALIASWARN (strerror);
848 #elif defined GNULIB_POSIXCHECK
850 /* Assume strerror is always declared. */
851 _GL_WARN_ON_USE (strerror, "strerror is unportable - "
852 "use gnulib module strerror to guarantee non-NULL result");
855 #if @GNULIB_STRSIGNAL@
856 # if @REPLACE_STRSIGNAL@
857 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
858 # define strsignal rpl_strsignal
860 _GL_FUNCDECL_RPL (strsignal, char *, (int __sig));
861 _GL_CXXALIAS_RPL (strsignal, char *, (int __sig));
863 # if ! @HAVE_DECL_STRSIGNAL@
864 _GL_FUNCDECL_SYS (strsignal, char *, (int __sig));
866 /* Need to cast, because on Cygwin 1.5.x systems, the return type is
868 _GL_CXXALIAS_SYS_CAST (strsignal, char *, (int __sig));
870 _GL_CXXALIASWARN (strsignal);
871 #elif defined GNULIB_POSIXCHECK
873 # if HAVE_RAW_DECL_STRSIGNAL
874 _GL_WARN_ON_USE (strsignal, "strsignal is unportable - "
875 "use gnulib module strsignal for portability");
879 #if @GNULIB_STRVERSCMP@
880 # if !@HAVE_STRVERSCMP@
881 _GL_FUNCDECL_SYS (strverscmp, int, (const char *, const char *)
882 _GL_ARG_NONNULL ((1, 2)));
884 _GL_CXXALIAS_SYS (strverscmp, int, (const char *, const char *));
885 _GL_CXXALIASWARN (strverscmp);
886 #elif defined GNULIB_POSIXCHECK
888 # if HAVE_RAW_DECL_STRVERSCMP
889 _GL_WARN_ON_USE (strverscmp, "strverscmp is unportable - "
890 "use gnulib module strverscmp for portability");
895 #endif /* _GL_STRING_H */
896 #endif /* _GL_STRING_H */