Line data Source code
1 : /* Copyright (C) 1991-2014 Free Software Foundation, Inc.
2 : This file is part of the GNU C Library.
3 :
4 : The GNU C Library is free software; you can redistribute it and/or
5 : modify it under the terms of the GNU Lesser General Public
6 : License as published by the Free Software Foundation; either
7 : version 2.1 of the License, or (at your option) any later version.
8 :
9 : The GNU C Library is distributed in the hope that it will be useful,
10 : but WITHOUT ANY WARRANTY; without even the implied warranty of
11 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 : Lesser General Public License for more details.
13 :
14 : You should have received a copy of the GNU Lesser General Public
15 : License along with the GNU C Library; if not, see
16 : <http://www.gnu.org/licenses/>. */
17 :
18 : /*
19 : * ISO C99 Standard: 7.21 String handling <string.h>
20 : */
21 :
22 : #ifndef _STRING_H
23 : #define _STRING_H 1
24 :
25 : #include <features.h>
26 :
27 : __BEGIN_DECLS
28 :
29 : /* Get size_t and NULL from <stddef.h>. */
30 : #define __need_size_t
31 : #define __need_NULL
32 : #include <stddef.h>
33 :
34 : /* Provide correct C++ prototypes, and indicate this to the caller. This
35 : requires a compatible C++ standard library. As a heuristic, we provide
36 : these when the compiler indicates full conformance with C++98 or later,
37 : and for older GCC versions that are known to provide a compatible
38 : libstdc++. */
39 : #if defined __cplusplus && (__cplusplus >= 199711L || __GNUC_PREREQ (4, 4))
40 : # define __CORRECT_ISO_CPP_STRING_H_PROTO
41 : #endif
42 :
43 :
44 : __BEGIN_NAMESPACE_STD
45 : /* Copy N bytes of SRC to DEST. */
46 : extern void *memcpy (void *__restrict __dest, const void *__restrict __src,
47 : size_t __n) __THROW __nonnull ((1, 2));
48 : /* Copy N bytes of SRC to DEST, guaranteeing
49 : correct behavior for overlapping strings. */
50 : extern void *memmove (void *__dest, const void *__src, size_t __n)
51 : __THROW __nonnull ((1, 2));
52 : __END_NAMESPACE_STD
53 :
54 : /* Copy no more than N bytes of SRC to DEST, stopping when C is found.
55 : Return the position in DEST one byte past where C was copied,
56 : or NULL if C was not found in the first N bytes of SRC. */
57 : #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN
58 : extern void *memccpy (void *__restrict __dest, const void *__restrict __src,
59 : int __c, size_t __n)
60 : __THROW __nonnull ((1, 2));
61 : #endif /* SVID. */
62 :
63 :
64 : __BEGIN_NAMESPACE_STD
65 : /* Set N bytes of S to C. */
66 : extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1));
67 :
68 : /* Compare N bytes of S1 and S2. */
69 : extern int memcmp (const void *__s1, const void *__s2, size_t __n)
70 : __THROW __attribute_pure__ __nonnull ((1, 2));
71 :
72 : /* Search N bytes of S for C. */
73 : #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
74 : extern "C++"
75 : {
76 : extern void *memchr (void *__s, int __c, size_t __n)
77 : __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
78 : extern const void *memchr (const void *__s, int __c, size_t __n)
79 : __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
80 :
81 : # ifdef __OPTIMIZE__
82 : __extern_always_inline void *
83 : memchr (void *__s, int __c, size_t __n) __THROW
84 : {
85 : return __builtin_memchr (__s, __c, __n);
86 : }
87 :
88 : __extern_always_inline const void *
89 : memchr (const void *__s, int __c, size_t __n) __THROW
90 : {
91 0 : return __builtin_memchr (__s, __c, __n);
92 : }
93 : # endif
94 : }
95 : #else
96 : extern void *memchr (const void *__s, int __c, size_t __n)
97 : __THROW __attribute_pure__ __nonnull ((1));
98 : #endif
99 : __END_NAMESPACE_STD
100 :
101 : #ifdef __USE_GNU
102 : /* Search in S for C. This is similar to `memchr' but there is no
103 : length limit. */
104 : # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
105 : extern "C++" void *rawmemchr (void *__s, int __c)
106 : __THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1));
107 : extern "C++" const void *rawmemchr (const void *__s, int __c)
108 : __THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1));
109 : # else
110 : extern void *rawmemchr (const void *__s, int __c)
111 : __THROW __attribute_pure__ __nonnull ((1));
112 : # endif
113 :
114 : /* Search N bytes of S for the final occurrence of C. */
115 : # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
116 : extern "C++" void *memrchr (void *__s, int __c, size_t __n)
117 : __THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1));
118 : extern "C++" const void *memrchr (const void *__s, int __c, size_t __n)
119 : __THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1));
120 : # else
121 : extern void *memrchr (const void *__s, int __c, size_t __n)
122 : __THROW __attribute_pure__ __nonnull ((1));
123 : # endif
124 : #endif
125 :
126 :
127 : __BEGIN_NAMESPACE_STD
128 : /* Copy SRC to DEST. */
129 : extern char *strcpy (char *__restrict __dest, const char *__restrict __src)
130 : __THROW __nonnull ((1, 2));
131 : /* Copy no more than N characters of SRC to DEST. */
132 : extern char *strncpy (char *__restrict __dest,
133 : const char *__restrict __src, size_t __n)
134 : __THROW __nonnull ((1, 2));
135 :
136 : /* Append SRC onto DEST. */
137 : extern char *strcat (char *__restrict __dest, const char *__restrict __src)
138 : __THROW __nonnull ((1, 2));
139 : /* Append no more than N characters from SRC onto DEST. */
140 : extern char *strncat (char *__restrict __dest, const char *__restrict __src,
141 : size_t __n) __THROW __nonnull ((1, 2));
142 :
143 : /* Compare S1 and S2. */
144 : extern int strcmp (const char *__s1, const char *__s2)
145 : __THROW __attribute_pure__ __nonnull ((1, 2));
146 : /* Compare N characters of S1 and S2. */
147 : extern int strncmp (const char *__s1, const char *__s2, size_t __n)
148 : __THROW __attribute_pure__ __nonnull ((1, 2));
149 :
150 : /* Compare the collated forms of S1 and S2. */
151 : extern int strcoll (const char *__s1, const char *__s2)
152 : __THROW __attribute_pure__ __nonnull ((1, 2));
153 : /* Put a transformation of SRC into no more than N bytes of DEST. */
154 : extern size_t strxfrm (char *__restrict __dest,
155 : const char *__restrict __src, size_t __n)
156 : __THROW __nonnull ((2));
157 : __END_NAMESPACE_STD
158 :
159 : #ifdef __USE_XOPEN2K8
160 : /* The following functions are equivalent to the both above but they
161 : take the locale they use for the collation as an extra argument.
162 : This is not standardsized but something like will come. */
163 : # include <xlocale.h>
164 :
165 : /* Compare the collated forms of S1 and S2 using rules from L. */
166 : extern int strcoll_l (const char *__s1, const char *__s2, __locale_t __l)
167 : __THROW __attribute_pure__ __nonnull ((1, 2, 3));
168 : /* Put a transformation of SRC into no more than N bytes of DEST. */
169 : extern size_t strxfrm_l (char *__dest, const char *__src, size_t __n,
170 : __locale_t __l) __THROW __nonnull ((2, 4));
171 : #endif
172 :
173 : #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED \
174 : || defined __USE_XOPEN2K8
175 : /* Duplicate S, returning an identical malloc'd string. */
176 : extern char *strdup (const char *__s)
177 : __THROW __attribute_malloc__ __nonnull ((1));
178 : #endif
179 :
180 : /* Return a malloc'd copy of at most N bytes of STRING. The
181 : resultant string is terminated even if no null terminator
182 : appears before STRING[N]. */
183 : #if defined __USE_XOPEN2K8
184 : extern char *strndup (const char *__string, size_t __n)
185 : __THROW __attribute_malloc__ __nonnull ((1));
186 : #endif
187 :
188 : #if defined __USE_GNU && defined __GNUC__
189 : /* Duplicate S, returning an identical alloca'd string. */
190 : # define strdupa(s) \
191 : (__extension__ \
192 : ({ \
193 : const char *__old = (s); \
194 : size_t __len = strlen (__old) + 1; \
195 : char *__new = (char *) __builtin_alloca (__len); \
196 : (char *) memcpy (__new, __old, __len); \
197 : }))
198 :
199 : /* Return an alloca'd copy of at most N bytes of string. */
200 : # define strndupa(s, n) \
201 : (__extension__ \
202 : ({ \
203 : const char *__old = (s); \
204 : size_t __len = strnlen (__old, (n)); \
205 : char *__new = (char *) __builtin_alloca (__len + 1); \
206 : __new[__len] = '\0'; \
207 : (char *) memcpy (__new, __old, __len); \
208 : }))
209 : #endif
210 :
211 : __BEGIN_NAMESPACE_STD
212 : /* Find the first occurrence of C in S. */
213 : #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
214 : extern "C++"
215 : {
216 : extern char *strchr (char *__s, int __c)
217 : __THROW __asm ("strchr") __attribute_pure__ __nonnull ((1));
218 : extern const char *strchr (const char *__s, int __c)
219 : __THROW __asm ("strchr") __attribute_pure__ __nonnull ((1));
220 :
221 : # ifdef __OPTIMIZE__
222 : __extern_always_inline char *
223 : strchr (char *__s, int __c) __THROW
224 : {
225 237 : return __builtin_strchr (__s, __c);
226 : }
227 :
228 : __extern_always_inline const char *
229 : strchr (const char *__s, int __c) __THROW
230 : {
231 454786 : return __builtin_strchr (__s, __c);
232 : }
233 : # endif
234 : }
235 : #else
236 : extern char *strchr (const char *__s, int __c)
237 : __THROW __attribute_pure__ __nonnull ((1));
238 : #endif
239 : /* Find the last occurrence of C in S. */
240 : #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
241 : extern "C++"
242 : {
243 : extern char *strrchr (char *__s, int __c)
244 : __THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1));
245 : extern const char *strrchr (const char *__s, int __c)
246 : __THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1));
247 :
248 : # ifdef __OPTIMIZE__
249 : __extern_always_inline char *
250 : strrchr (char *__s, int __c) __THROW
251 : {
252 : return __builtin_strrchr (__s, __c);
253 : }
254 :
255 : __extern_always_inline const char *
256 : strrchr (const char *__s, int __c) __THROW
257 : {
258 : return __builtin_strrchr (__s, __c);
259 : }
260 : # endif
261 : }
262 : #else
263 : extern char *strrchr (const char *__s, int __c)
264 : __THROW __attribute_pure__ __nonnull ((1));
265 : #endif
266 : __END_NAMESPACE_STD
267 :
268 : #ifdef __USE_GNU
269 : /* This function is similar to `strchr'. But it returns a pointer to
270 : the closing NUL byte in case C is not found in S. */
271 : # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
272 : extern "C++" char *strchrnul (char *__s, int __c)
273 : __THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1));
274 : extern "C++" const char *strchrnul (const char *__s, int __c)
275 : __THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1));
276 : # else
277 : extern char *strchrnul (const char *__s, int __c)
278 : __THROW __attribute_pure__ __nonnull ((1));
279 : # endif
280 : #endif
281 :
282 : __BEGIN_NAMESPACE_STD
283 : /* Return the length of the initial segment of S which
284 : consists entirely of characters not in REJECT. */
285 : extern size_t strcspn (const char *__s, const char *__reject)
286 : __THROW __attribute_pure__ __nonnull ((1, 2));
287 : /* Return the length of the initial segment of S which
288 : consists entirely of characters in ACCEPT. */
289 : extern size_t strspn (const char *__s, const char *__accept)
290 : __THROW __attribute_pure__ __nonnull ((1, 2));
291 : /* Find the first occurrence in S of any character in ACCEPT. */
292 : #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
293 : extern "C++"
294 : {
295 : extern char *strpbrk (char *__s, const char *__accept)
296 : __THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2));
297 : extern const char *strpbrk (const char *__s, const char *__accept)
298 : __THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2));
299 :
300 : # ifdef __OPTIMIZE__
301 : __extern_always_inline char *
302 : strpbrk (char *__s, const char *__accept) __THROW
303 : {
304 : return __builtin_strpbrk (__s, __accept);
305 : }
306 :
307 : __extern_always_inline const char *
308 : strpbrk (const char *__s, const char *__accept) __THROW
309 : {
310 0 : return __builtin_strpbrk (__s, __accept);
311 : }
312 : # endif
313 : }
314 : #else
315 : extern char *strpbrk (const char *__s, const char *__accept)
316 : __THROW __attribute_pure__ __nonnull ((1, 2));
317 : #endif
318 : /* Find the first occurrence of NEEDLE in HAYSTACK. */
319 : #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
320 : extern "C++"
321 : {
322 : extern char *strstr (char *__haystack, const char *__needle)
323 : __THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2));
324 : extern const char *strstr (const char *__haystack, const char *__needle)
325 : __THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2));
326 :
327 : # ifdef __OPTIMIZE__
328 : __extern_always_inline char *
329 : strstr (char *__haystack, const char *__needle) __THROW
330 : {
331 : return __builtin_strstr (__haystack, __needle);
332 : }
333 :
334 : __extern_always_inline const char *
335 : strstr (const char *__haystack, const char *__needle) __THROW
336 : {
337 : return __builtin_strstr (__haystack, __needle);
338 : }
339 : # endif
340 : }
341 : #else
342 : extern char *strstr (const char *__haystack, const char *__needle)
343 : __THROW __attribute_pure__ __nonnull ((1, 2));
344 : #endif
345 :
346 :
347 : /* Divide S into tokens separated by characters in DELIM. */
348 : extern char *strtok (char *__restrict __s, const char *__restrict __delim)
349 : __THROW __nonnull ((2));
350 : __END_NAMESPACE_STD
351 :
352 : /* Divide S into tokens separated by characters in DELIM. Information
353 : passed between calls are stored in SAVE_PTR. */
354 : extern char *__strtok_r (char *__restrict __s,
355 : const char *__restrict __delim,
356 : char **__restrict __save_ptr)
357 : __THROW __nonnull ((2, 3));
358 : #if defined __USE_POSIX || defined __USE_MISC
359 : extern char *strtok_r (char *__restrict __s, const char *__restrict __delim,
360 : char **__restrict __save_ptr)
361 : __THROW __nonnull ((2, 3));
362 : #endif
363 :
364 : #ifdef __USE_GNU
365 : /* Similar to `strstr' but this function ignores the case of both strings. */
366 : # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
367 : extern "C++" char *strcasestr (char *__haystack, const char *__needle)
368 : __THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2));
369 : extern "C++" const char *strcasestr (const char *__haystack,
370 : const char *__needle)
371 : __THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2));
372 : # else
373 : extern char *strcasestr (const char *__haystack, const char *__needle)
374 : __THROW __attribute_pure__ __nonnull ((1, 2));
375 : # endif
376 : #endif
377 :
378 : #ifdef __USE_GNU
379 : /* Find the first occurrence of NEEDLE in HAYSTACK.
380 : NEEDLE is NEEDLELEN bytes long;
381 : HAYSTACK is HAYSTACKLEN bytes long. */
382 : extern void *memmem (const void *__haystack, size_t __haystacklen,
383 : const void *__needle, size_t __needlelen)
384 : __THROW __attribute_pure__ __nonnull ((1, 3));
385 :
386 : /* Copy N bytes of SRC to DEST, return pointer to bytes after the
387 : last written byte. */
388 : extern void *__mempcpy (void *__restrict __dest,
389 : const void *__restrict __src, size_t __n)
390 : __THROW __nonnull ((1, 2));
391 : extern void *mempcpy (void *__restrict __dest,
392 : const void *__restrict __src, size_t __n)
393 : __THROW __nonnull ((1, 2));
394 : #endif
395 :
396 :
397 : __BEGIN_NAMESPACE_STD
398 : /* Return the length of S. */
399 : extern size_t strlen (const char *__s)
400 : __THROW __attribute_pure__ __nonnull ((1));
401 : __END_NAMESPACE_STD
402 :
403 : #ifdef __USE_XOPEN2K8
404 : /* Find the length of STRING, but scan at most MAXLEN characters.
405 : If no '\0' terminator is found in that many characters, return MAXLEN. */
406 : extern size_t strnlen (const char *__string, size_t __maxlen)
407 : __THROW __attribute_pure__ __nonnull ((1));
408 : #endif
409 :
410 :
411 : __BEGIN_NAMESPACE_STD
412 : /* Return a string describing the meaning of the `errno' code in ERRNUM. */
413 : extern char *strerror (int __errnum) __THROW;
414 : __END_NAMESPACE_STD
415 : #if defined __USE_XOPEN2K || defined __USE_MISC
416 : /* Reentrant version of `strerror'.
417 : There are 2 flavors of `strerror_r', GNU which returns the string
418 : and may or may not use the supplied temporary buffer and POSIX one
419 : which fills the string into the buffer.
420 : To use the POSIX version, -D_XOPEN_SOURCE=600 or -D_POSIX_C_SOURCE=200112L
421 : without -D_GNU_SOURCE is needed, otherwise the GNU version is
422 : preferred. */
423 : # if defined __USE_XOPEN2K && !defined __USE_GNU
424 : /* Fill BUF with a string describing the meaning of the `errno' code in
425 : ERRNUM. */
426 : # ifdef __REDIRECT_NTH
427 : extern int __REDIRECT_NTH (strerror_r,
428 : (int __errnum, char *__buf, size_t __buflen),
429 : __xpg_strerror_r) __nonnull ((2));
430 : # else
431 : extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen)
432 : __THROW __nonnull ((2));
433 : # define strerror_r __xpg_strerror_r
434 : # endif
435 : # else
436 : /* If a temporary buffer is required, at most BUFLEN bytes of BUF will be
437 : used. */
438 : extern char *strerror_r (int __errnum, char *__buf, size_t __buflen)
439 : __THROW __nonnull ((2)) __wur;
440 : # endif
441 : #endif
442 :
443 : #ifdef __USE_XOPEN2K8
444 : /* Translate error number to string according to the locale L. */
445 : extern char *strerror_l (int __errnum, __locale_t __l) __THROW;
446 : #endif
447 :
448 :
449 : /* We define this function always since `bzero' is sometimes needed when
450 : the namespace rules does not allow this. */
451 : extern void __bzero (void *__s, size_t __n) __THROW __nonnull ((1));
452 :
453 : #ifdef __USE_BSD
454 : /* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
455 : extern void bcopy (const void *__src, void *__dest, size_t __n)
456 : __THROW __nonnull ((1, 2));
457 :
458 : /* Set N bytes of S to 0. */
459 : extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1));
460 :
461 : /* Compare N bytes of S1 and S2 (same as memcmp). */
462 : extern int bcmp (const void *__s1, const void *__s2, size_t __n)
463 : __THROW __attribute_pure__ __nonnull ((1, 2));
464 :
465 : /* Find the first occurrence of C in S (same as strchr). */
466 : # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
467 : extern "C++"
468 : {
469 : extern char *index (char *__s, int __c)
470 : __THROW __asm ("index") __attribute_pure__ __nonnull ((1));
471 : extern const char *index (const char *__s, int __c)
472 : __THROW __asm ("index") __attribute_pure__ __nonnull ((1));
473 :
474 : # if defined __OPTIMIZE__ && !defined __CORRECT_ISO_CPP_STRINGS_H_PROTO
475 : __extern_always_inline char *
476 : index (char *__s, int __c) __THROW
477 : {
478 : return __builtin_index (__s, __c);
479 : }
480 :
481 : __extern_always_inline const char *
482 : index (const char *__s, int __c) __THROW
483 : {
484 : return __builtin_index (__s, __c);
485 : }
486 : # endif
487 : }
488 : # else
489 : extern char *index (const char *__s, int __c)
490 : __THROW __attribute_pure__ __nonnull ((1));
491 : # endif
492 :
493 : /* Find the last occurrence of C in S (same as strrchr). */
494 : # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
495 : extern "C++"
496 : {
497 : extern char *rindex (char *__s, int __c)
498 : __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1));
499 : extern const char *rindex (const char *__s, int __c)
500 : __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1));
501 :
502 : # if defined __OPTIMIZE__ && !defined __CORRECT_ISO_CPP_STRINGS_H_PROTO
503 : __extern_always_inline char *
504 : rindex (char *__s, int __c) __THROW
505 : {
506 : return __builtin_rindex (__s, __c);
507 : }
508 :
509 : __extern_always_inline const char *
510 : rindex (const char *__s, int __c) __THROW
511 : {
512 : return __builtin_rindex (__s, __c);
513 : }
514 : #endif
515 : }
516 : # else
517 : extern char *rindex (const char *__s, int __c)
518 : __THROW __attribute_pure__ __nonnull ((1));
519 : # endif
520 :
521 : /* Return the position of the first bit set in I, or 0 if none are set.
522 : The least-significant bit is position 1, the most-significant 32. */
523 : extern int ffs (int __i) __THROW __attribute__ ((__const__));
524 :
525 : /* The following two functions are non-standard but necessary for non-32 bit
526 : platforms. */
527 : # ifdef __USE_GNU
528 : extern int ffsl (long int __l) __THROW __attribute__ ((__const__));
529 : __extension__ extern int ffsll (long long int __ll)
530 : __THROW __attribute__ ((__const__));
531 : # endif
532 :
533 : /* Compare S1 and S2, ignoring case. */
534 : extern int strcasecmp (const char *__s1, const char *__s2)
535 : __THROW __attribute_pure__ __nonnull ((1, 2));
536 :
537 : /* Compare no more than N chars of S1 and S2, ignoring case. */
538 : extern int strncasecmp (const char *__s1, const char *__s2, size_t __n)
539 : __THROW __attribute_pure__ __nonnull ((1, 2));
540 : #endif /* Use BSD. */
541 :
542 : #ifdef __USE_GNU
543 : /* Again versions of a few functions which use the given locale instead
544 : of the global one. */
545 : extern int strcasecmp_l (const char *__s1, const char *__s2,
546 : __locale_t __loc)
547 : __THROW __attribute_pure__ __nonnull ((1, 2, 3));
548 :
549 : extern int strncasecmp_l (const char *__s1, const char *__s2,
550 : size_t __n, __locale_t __loc)
551 : __THROW __attribute_pure__ __nonnull ((1, 2, 4));
552 : #endif
553 :
554 : #ifdef __USE_BSD
555 : /* Return the next DELIM-delimited token from *STRINGP,
556 : terminating it with a '\0', and update *STRINGP to point past it. */
557 : extern char *strsep (char **__restrict __stringp,
558 : const char *__restrict __delim)
559 : __THROW __nonnull ((1, 2));
560 : #endif
561 :
562 : #ifdef __USE_XOPEN2K8
563 : /* Return a string describing the meaning of the signal number in SIG. */
564 : extern char *strsignal (int __sig) __THROW;
565 :
566 : /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
567 : extern char *__stpcpy (char *__restrict __dest, const char *__restrict __src)
568 : __THROW __nonnull ((1, 2));
569 : extern char *stpcpy (char *__restrict __dest, const char *__restrict __src)
570 : __THROW __nonnull ((1, 2));
571 :
572 : /* Copy no more than N characters of SRC to DEST, returning the address of
573 : the last character written into DEST. */
574 : extern char *__stpncpy (char *__restrict __dest,
575 : const char *__restrict __src, size_t __n)
576 : __THROW __nonnull ((1, 2));
577 : extern char *stpncpy (char *__restrict __dest,
578 : const char *__restrict __src, size_t __n)
579 : __THROW __nonnull ((1, 2));
580 : #endif
581 :
582 : #ifdef __USE_GNU
583 : /* Compare S1 and S2 as strings holding name & indices/version numbers. */
584 : extern int strverscmp (const char *__s1, const char *__s2)
585 : __THROW __attribute_pure__ __nonnull ((1, 2));
586 :
587 : /* Sautee STRING briskly. */
588 : extern char *strfry (char *__string) __THROW __nonnull ((1));
589 :
590 : /* Frobnicate N bytes of S. */
591 : extern void *memfrob (void *__s, size_t __n) __THROW __nonnull ((1));
592 :
593 : # ifndef basename
594 : /* Return the file name within directory of FILENAME. We don't
595 : declare the function if the `basename' macro is available (defined
596 : in <libgen.h>) which makes the XPG version of this function
597 : available. */
598 : # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
599 : extern "C++" char *basename (char *__filename)
600 : __THROW __asm ("basename") __nonnull ((1));
601 : extern "C++" const char *basename (const char *__filename)
602 : __THROW __asm ("basename") __nonnull ((1));
603 : # else
604 : extern char *basename (const char *__filename) __THROW __nonnull ((1));
605 : # endif
606 : # endif
607 : #endif
608 :
609 :
610 : #if defined __GNUC__ && __GNUC__ >= 2
611 : # if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ \
612 : && !defined __NO_INLINE__ && !defined __cplusplus
613 : /* When using GNU CC we provide some optimized versions of selected
614 : functions from this header. There are two kinds of optimizations:
615 :
616 : - machine-dependent optimizations, most probably using inline
617 : assembler code; these might be quite expensive since the code
618 : size can increase significantly.
619 : These optimizations are not used unless the symbol
620 : __USE_STRING_INLINES
621 : is defined before including this header.
622 :
623 : - machine-independent optimizations which do not increase the
624 : code size significantly and which optimize mainly situations
625 : where one or more arguments are compile-time constants.
626 : These optimizations are used always when the compiler is
627 : taught to optimize.
628 :
629 : One can inhibit all optimizations by defining __NO_STRING_INLINES. */
630 :
631 : /* Get the machine-dependent optimizations (if any). */
632 : # include <bits/string.h>
633 :
634 : /* These are generic optimizations which do not add too much inline code. */
635 : # include <bits/string2.h>
636 : # endif
637 :
638 : # if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
639 : /* Functions with security checks. */
640 : # include <bits/string3.h>
641 : # endif
642 : #endif
643 :
644 : __END_DECLS
645 :
646 : #endif /* string.h */
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