1 | /* Copyright (C) 1991-2017 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 | #define |
26 | #include <bits/libc-header-start.h> |
27 | |
28 | __BEGIN_DECLS |
29 | |
30 | /* Get size_t and NULL from <stddef.h>. */ |
31 | #define __need_size_t |
32 | #define __need_NULL |
33 | #include <stddef.h> |
34 | |
35 | /* Tell the caller that we provide correct C++ prototypes. */ |
36 | #if defined __cplusplus && __GNUC_PREREQ (4, 4) |
37 | # define __CORRECT_ISO_CPP_STRING_H_PROTO |
38 | #endif |
39 | |
40 | |
41 | __BEGIN_NAMESPACE_STD |
42 | /* Copy N bytes of SRC to DEST. */ |
43 | extern void *memcpy (void *__restrict __dest, const void *__restrict __src, |
44 | size_t __n) __THROW __nonnull ((1, 2)); |
45 | /* Copy N bytes of SRC to DEST, guaranteeing |
46 | correct behavior for overlapping strings. */ |
47 | extern void *memmove (void *__dest, const void *__src, size_t __n) |
48 | __THROW __nonnull ((1, 2)); |
49 | __END_NAMESPACE_STD |
50 | |
51 | /* Copy no more than N bytes of SRC to DEST, stopping when C is found. |
52 | Return the position in DEST one byte past where C was copied, |
53 | or NULL if C was not found in the first N bytes of SRC. */ |
54 | #if defined __USE_MISC || defined __USE_XOPEN |
55 | extern void *memccpy (void *__restrict __dest, const void *__restrict __src, |
56 | int __c, size_t __n) |
57 | __THROW __nonnull ((1, 2)); |
58 | #endif /* Misc || X/Open. */ |
59 | |
60 | |
61 | __BEGIN_NAMESPACE_STD |
62 | /* Set N bytes of S to C. */ |
63 | extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1)); |
64 | |
65 | /* Compare N bytes of S1 and S2. */ |
66 | extern int memcmp (const void *__s1, const void *__s2, size_t __n) |
67 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
68 | |
69 | /* Search N bytes of S for C. */ |
70 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
71 | extern "C++" |
72 | { |
73 | extern void *memchr (void *__s, int __c, size_t __n) |
74 | __THROW __asm ("memchr" ) __attribute_pure__ __nonnull ((1)); |
75 | extern const void *memchr (const void *__s, int __c, size_t __n) |
76 | __THROW __asm ("memchr" ) __attribute_pure__ __nonnull ((1)); |
77 | |
78 | # ifdef __OPTIMIZE__ |
79 | __extern_always_inline void * |
80 | memchr (void *__s, int __c, size_t __n) __THROW |
81 | { |
82 | return __builtin_memchr (__s, __c, __n); |
83 | } |
84 | |
85 | __extern_always_inline const void * |
86 | memchr (const void *__s, int __c, size_t __n) __THROW |
87 | { |
88 | return __builtin_memchr (__s, __c, __n); |
89 | } |
90 | # endif |
91 | } |
92 | #else |
93 | extern void *memchr (const void *__s, int __c, size_t __n) |
94 | __THROW __attribute_pure__ __nonnull ((1)); |
95 | #endif |
96 | __END_NAMESPACE_STD |
97 | |
98 | #ifdef __USE_GNU |
99 | /* Search in S for C. This is similar to `memchr' but there is no |
100 | length limit. */ |
101 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
102 | extern "C++" void *rawmemchr (void *__s, int __c) |
103 | __THROW __asm ("rawmemchr" ) __attribute_pure__ __nonnull ((1)); |
104 | extern "C++" const void *rawmemchr (const void *__s, int __c) |
105 | __THROW __asm ("rawmemchr" ) __attribute_pure__ __nonnull ((1)); |
106 | # else |
107 | extern void *rawmemchr (const void *__s, int __c) |
108 | __THROW __attribute_pure__ __nonnull ((1)); |
109 | # endif |
110 | |
111 | /* Search N bytes of S for the final occurrence of C. */ |
112 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
113 | extern "C++" void *memrchr (void *__s, int __c, size_t __n) |
114 | __THROW __asm ("memrchr" ) __attribute_pure__ __nonnull ((1)); |
115 | extern "C++" const void *memrchr (const void *__s, int __c, size_t __n) |
116 | __THROW __asm ("memrchr" ) __attribute_pure__ __nonnull ((1)); |
117 | # else |
118 | extern void *memrchr (const void *__s, int __c, size_t __n) |
119 | __THROW __attribute_pure__ __nonnull ((1)); |
120 | # endif |
121 | #endif |
122 | |
123 | |
124 | __BEGIN_NAMESPACE_STD |
125 | /* Copy SRC to DEST. */ |
126 | extern char *strcpy (char *__restrict __dest, const char *__restrict __src) |
127 | __THROW __nonnull ((1, 2)); |
128 | /* Copy no more than N characters of SRC to DEST. */ |
129 | extern char *strncpy (char *__restrict __dest, |
130 | const char *__restrict __src, size_t __n) |
131 | __THROW __nonnull ((1, 2)); |
132 | |
133 | /* Append SRC onto DEST. */ |
134 | extern char *strcat (char *__restrict __dest, const char *__restrict __src) |
135 | __THROW __nonnull ((1, 2)); |
136 | /* Append no more than N characters from SRC onto DEST. */ |
137 | extern char *strncat (char *__restrict __dest, const char *__restrict __src, |
138 | size_t __n) __THROW __nonnull ((1, 2)); |
139 | |
140 | /* Compare S1 and S2. */ |
141 | extern int strcmp (const char *__s1, const char *__s2) |
142 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
143 | /* Compare N characters of S1 and S2. */ |
144 | extern int strncmp (const char *__s1, const char *__s2, size_t __n) |
145 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
146 | |
147 | /* Compare the collated forms of S1 and S2. */ |
148 | extern int strcoll (const char *__s1, const char *__s2) |
149 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
150 | /* Put a transformation of SRC into no more than N bytes of DEST. */ |
151 | extern size_t strxfrm (char *__restrict __dest, |
152 | const char *__restrict __src, size_t __n) |
153 | __THROW __nonnull ((2)); |
154 | __END_NAMESPACE_STD |
155 | |
156 | #ifdef __USE_XOPEN2K8 |
157 | # include <xlocale.h> |
158 | |
159 | /* Compare the collated forms of S1 and S2, using sorting rules from L. */ |
160 | extern int strcoll_l (const char *__s1, const char *__s2, __locale_t __l) |
161 | __THROW __attribute_pure__ __nonnull ((1, 2, 3)); |
162 | /* Put a transformation of SRC into no more than N bytes of DEST, |
163 | using sorting rules from L. */ |
164 | extern size_t strxfrm_l (char *__dest, const char *__src, size_t __n, |
165 | __locale_t __l) __THROW __nonnull ((2, 4)); |
166 | #endif |
167 | |
168 | #if (defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 \ |
169 | || __GLIBC_USE (LIB_EXT2)) |
170 | /* Duplicate S, returning an identical malloc'd string. */ |
171 | extern char *strdup (const char *__s) |
172 | __THROW __attribute_malloc__ __nonnull ((1)); |
173 | #endif |
174 | |
175 | /* Return a malloc'd copy of at most N bytes of STRING. The |
176 | resultant string is terminated even if no null terminator |
177 | appears before STRING[N]. */ |
178 | #if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2) |
179 | extern char *strndup (const char *__string, size_t __n) |
180 | __THROW __attribute_malloc__ __nonnull ((1)); |
181 | #endif |
182 | |
183 | #if defined __USE_GNU && defined __GNUC__ |
184 | /* Duplicate S, returning an identical alloca'd string. */ |
185 | # define strdupa(s) \ |
186 | (__extension__ \ |
187 | ({ \ |
188 | const char *__old = (s); \ |
189 | size_t __len = strlen (__old) + 1; \ |
190 | char *__new = (char *) __builtin_alloca (__len); \ |
191 | (char *) memcpy (__new, __old, __len); \ |
192 | })) |
193 | |
194 | /* Return an alloca'd copy of at most N bytes of string. */ |
195 | # define strndupa(s, n) \ |
196 | (__extension__ \ |
197 | ({ \ |
198 | const char *__old = (s); \ |
199 | size_t __len = strnlen (__old, (n)); \ |
200 | char *__new = (char *) __builtin_alloca (__len + 1); \ |
201 | __new[__len] = '\0'; \ |
202 | (char *) memcpy (__new, __old, __len); \ |
203 | })) |
204 | #endif |
205 | |
206 | __BEGIN_NAMESPACE_STD |
207 | /* Find the first occurrence of C in S. */ |
208 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
209 | extern "C++" |
210 | { |
211 | extern char *strchr (char *__s, int __c) |
212 | __THROW __asm ("strchr" ) __attribute_pure__ __nonnull ((1)); |
213 | extern const char *strchr (const char *__s, int __c) |
214 | __THROW __asm ("strchr" ) __attribute_pure__ __nonnull ((1)); |
215 | |
216 | # ifdef __OPTIMIZE__ |
217 | __extern_always_inline char * |
218 | strchr (char *__s, int __c) __THROW |
219 | { |
220 | return __builtin_strchr (__s, __c); |
221 | } |
222 | |
223 | __extern_always_inline const char * |
224 | strchr (const char *__s, int __c) __THROW |
225 | { |
226 | return __builtin_strchr (__s, __c); |
227 | } |
228 | # endif |
229 | } |
230 | #else |
231 | extern char *strchr (const char *__s, int __c) |
232 | __THROW __attribute_pure__ __nonnull ((1)); |
233 | #endif |
234 | /* Find the last occurrence of C in S. */ |
235 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
236 | extern "C++" |
237 | { |
238 | extern char *strrchr (char *__s, int __c) |
239 | __THROW __asm ("strrchr" ) __attribute_pure__ __nonnull ((1)); |
240 | extern const char *strrchr (const char *__s, int __c) |
241 | __THROW __asm ("strrchr" ) __attribute_pure__ __nonnull ((1)); |
242 | |
243 | # ifdef __OPTIMIZE__ |
244 | __extern_always_inline char * |
245 | strrchr (char *__s, int __c) __THROW |
246 | { |
247 | return __builtin_strrchr (__s, __c); |
248 | } |
249 | |
250 | __extern_always_inline const char * |
251 | strrchr (const char *__s, int __c) __THROW |
252 | { |
253 | return __builtin_strrchr (__s, __c); |
254 | } |
255 | # endif |
256 | } |
257 | #else |
258 | extern char *strrchr (const char *__s, int __c) |
259 | __THROW __attribute_pure__ __nonnull ((1)); |
260 | #endif |
261 | __END_NAMESPACE_STD |
262 | |
263 | #ifdef __USE_GNU |
264 | /* This function is similar to `strchr'. But it returns a pointer to |
265 | the closing NUL byte in case C is not found in S. */ |
266 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
267 | extern "C++" char *strchrnul (char *__s, int __c) |
268 | __THROW __asm ("strchrnul" ) __attribute_pure__ __nonnull ((1)); |
269 | extern "C++" const char *strchrnul (const char *__s, int __c) |
270 | __THROW __asm ("strchrnul" ) __attribute_pure__ __nonnull ((1)); |
271 | # else |
272 | extern char *strchrnul (const char *__s, int __c) |
273 | __THROW __attribute_pure__ __nonnull ((1)); |
274 | # endif |
275 | #endif |
276 | |
277 | __BEGIN_NAMESPACE_STD |
278 | /* Return the length of the initial segment of S which |
279 | consists entirely of characters not in REJECT. */ |
280 | extern size_t strcspn (const char *__s, const char *__reject) |
281 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
282 | /* Return the length of the initial segment of S which |
283 | consists entirely of characters in ACCEPT. */ |
284 | extern size_t strspn (const char *__s, const char *__accept) |
285 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
286 | /* Find the first occurrence in S of any character in ACCEPT. */ |
287 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
288 | extern "C++" |
289 | { |
290 | extern char *strpbrk (char *__s, const char *__accept) |
291 | __THROW __asm ("strpbrk" ) __attribute_pure__ __nonnull ((1, 2)); |
292 | extern const char *strpbrk (const char *__s, const char *__accept) |
293 | __THROW __asm ("strpbrk" ) __attribute_pure__ __nonnull ((1, 2)); |
294 | |
295 | # ifdef __OPTIMIZE__ |
296 | __extern_always_inline char * |
297 | strpbrk (char *__s, const char *__accept) __THROW |
298 | { |
299 | return __builtin_strpbrk (__s, __accept); |
300 | } |
301 | |
302 | __extern_always_inline const char * |
303 | strpbrk (const char *__s, const char *__accept) __THROW |
304 | { |
305 | return __builtin_strpbrk (__s, __accept); |
306 | } |
307 | # endif |
308 | } |
309 | #else |
310 | extern char *strpbrk (const char *__s, const char *__accept) |
311 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
312 | #endif |
313 | /* Find the first occurrence of NEEDLE in HAYSTACK. */ |
314 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
315 | extern "C++" |
316 | { |
317 | extern char *strstr (char *__haystack, const char *__needle) |
318 | __THROW __asm ("strstr" ) __attribute_pure__ __nonnull ((1, 2)); |
319 | extern const char *strstr (const char *__haystack, const char *__needle) |
320 | __THROW __asm ("strstr" ) __attribute_pure__ __nonnull ((1, 2)); |
321 | |
322 | # ifdef __OPTIMIZE__ |
323 | __extern_always_inline char * |
324 | strstr (char *__haystack, const char *__needle) __THROW |
325 | { |
326 | return __builtin_strstr (__haystack, __needle); |
327 | } |
328 | |
329 | __extern_always_inline const char * |
330 | strstr (const char *__haystack, const char *__needle) __THROW |
331 | { |
332 | return __builtin_strstr (__haystack, __needle); |
333 | } |
334 | # endif |
335 | } |
336 | #else |
337 | extern char *strstr (const char *__haystack, const char *__needle) |
338 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
339 | #endif |
340 | |
341 | |
342 | /* Divide S into tokens separated by characters in DELIM. */ |
343 | extern char *strtok (char *__restrict __s, const char *__restrict __delim) |
344 | __THROW __nonnull ((2)); |
345 | __END_NAMESPACE_STD |
346 | |
347 | /* Divide S into tokens separated by characters in DELIM. Information |
348 | passed between calls are stored in SAVE_PTR. */ |
349 | extern char *__strtok_r (char *__restrict __s, |
350 | const char *__restrict __delim, |
351 | char **__restrict __save_ptr) |
352 | __THROW __nonnull ((2, 3)); |
353 | #ifdef __USE_POSIX |
354 | extern char *strtok_r (char *__restrict __s, const char *__restrict __delim, |
355 | char **__restrict __save_ptr) |
356 | __THROW __nonnull ((2, 3)); |
357 | #endif |
358 | |
359 | #ifdef __USE_GNU |
360 | /* Similar to `strstr' but this function ignores the case of both strings. */ |
361 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
362 | extern "C++" char *strcasestr (char *__haystack, const char *__needle) |
363 | __THROW __asm ("strcasestr" ) __attribute_pure__ __nonnull ((1, 2)); |
364 | extern "C++" const char *strcasestr (const char *__haystack, |
365 | const char *__needle) |
366 | __THROW __asm ("strcasestr" ) __attribute_pure__ __nonnull ((1, 2)); |
367 | # else |
368 | extern char *strcasestr (const char *__haystack, const char *__needle) |
369 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
370 | # endif |
371 | #endif |
372 | |
373 | #ifdef __USE_GNU |
374 | /* Find the first occurrence of NEEDLE in HAYSTACK. |
375 | NEEDLE is NEEDLELEN bytes long; |
376 | HAYSTACK is HAYSTACKLEN bytes long. */ |
377 | extern void *memmem (const void *__haystack, size_t __haystacklen, |
378 | const void *__needle, size_t __needlelen) |
379 | __THROW __attribute_pure__ __nonnull ((1, 3)); |
380 | |
381 | /* Copy N bytes of SRC to DEST, return pointer to bytes after the |
382 | last written byte. */ |
383 | extern void *__mempcpy (void *__restrict __dest, |
384 | const void *__restrict __src, size_t __n) |
385 | __THROW __nonnull ((1, 2)); |
386 | extern void *mempcpy (void *__restrict __dest, |
387 | const void *__restrict __src, size_t __n) |
388 | __THROW __nonnull ((1, 2)); |
389 | #endif |
390 | |
391 | |
392 | __BEGIN_NAMESPACE_STD |
393 | /* Return the length of S. */ |
394 | extern size_t strlen (const char *__s) |
395 | __THROW __attribute_pure__ __nonnull ((1)); |
396 | __END_NAMESPACE_STD |
397 | |
398 | #ifdef __USE_XOPEN2K8 |
399 | /* Find the length of STRING, but scan at most MAXLEN characters. |
400 | If no '\0' terminator is found in that many characters, return MAXLEN. */ |
401 | extern size_t strnlen (const char *__string, size_t __maxlen) |
402 | __THROW __attribute_pure__ __nonnull ((1)); |
403 | #endif |
404 | |
405 | |
406 | __BEGIN_NAMESPACE_STD |
407 | /* Return a string describing the meaning of the `errno' code in ERRNUM. */ |
408 | extern char *strerror (int __errnum) __THROW; |
409 | __END_NAMESPACE_STD |
410 | #ifdef __USE_XOPEN2K |
411 | /* Reentrant version of `strerror'. |
412 | There are 2 flavors of `strerror_r', GNU which returns the string |
413 | and may or may not use the supplied temporary buffer and POSIX one |
414 | which fills the string into the buffer. |
415 | To use the POSIX version, -D_XOPEN_SOURCE=600 or -D_POSIX_C_SOURCE=200112L |
416 | without -D_GNU_SOURCE is needed, otherwise the GNU version is |
417 | preferred. */ |
418 | # if defined __USE_XOPEN2K && !defined __USE_GNU |
419 | /* Fill BUF with a string describing the meaning of the `errno' code in |
420 | ERRNUM. */ |
421 | # ifdef __REDIRECT_NTH |
422 | extern int __REDIRECT_NTH (strerror_r, |
423 | (int __errnum, char *__buf, size_t __buflen), |
424 | __xpg_strerror_r) __nonnull ((2)); |
425 | # else |
426 | extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen) |
427 | __THROW __nonnull ((2)); |
428 | # define strerror_r __xpg_strerror_r |
429 | # endif |
430 | # else |
431 | /* If a temporary buffer is required, at most BUFLEN bytes of BUF will be |
432 | used. */ |
433 | extern char *strerror_r (int __errnum, char *__buf, size_t __buflen) |
434 | __THROW __nonnull ((2)) __wur; |
435 | # endif |
436 | #endif |
437 | |
438 | #ifdef __USE_XOPEN2K8 |
439 | /* Translate error number to string according to the locale L. */ |
440 | extern char *strerror_l (int __errnum, __locale_t __l) __THROW; |
441 | #endif |
442 | |
443 | |
444 | /* We define this function always since `bzero' is sometimes needed when |
445 | the namespace rules does not allow this. */ |
446 | extern void __bzero (void *__s, size_t __n) __THROW __nonnull ((1)); |
447 | |
448 | #ifdef __USE_MISC |
449 | /* Copy N bytes of SRC to DEST (like memmove, but args reversed). */ |
450 | extern void bcopy (const void *__src, void *__dest, size_t __n) |
451 | __THROW __nonnull ((1, 2)); |
452 | |
453 | /* Set N bytes of S to 0. */ |
454 | extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1)); |
455 | |
456 | /* As bzero, but the compiler will not delete a call to this |
457 | function, even if S is dead after the call. */ |
458 | extern void explicit_bzero (void *__s, size_t __n) __THROW __nonnull ((1)); |
459 | |
460 | /* Compare N bytes of S1 and S2 (same as memcmp). */ |
461 | extern int bcmp (const void *__s1, const void *__s2, size_t __n) |
462 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
463 | |
464 | /* Find the first occurrence of C in S (same as strchr). */ |
465 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
466 | extern "C++" |
467 | { |
468 | extern char *index (char *__s, int __c) |
469 | __THROW __asm ("index" ) __attribute_pure__ __nonnull ((1)); |
470 | extern const char *index (const char *__s, int __c) |
471 | __THROW __asm ("index" ) __attribute_pure__ __nonnull ((1)); |
472 | |
473 | # if defined __OPTIMIZE__ && !defined __CORRECT_ISO_CPP_STRINGS_H_PROTO |
474 | __extern_always_inline char * |
475 | index (char *__s, int __c) __THROW |
476 | { |
477 | return __builtin_index (__s, __c); |
478 | } |
479 | |
480 | __extern_always_inline const char * |
481 | index (const char *__s, int __c) __THROW |
482 | { |
483 | return __builtin_index (__s, __c); |
484 | } |
485 | # endif |
486 | } |
487 | # else |
488 | extern char *index (const char *__s, int __c) |
489 | __THROW __attribute_pure__ __nonnull ((1)); |
490 | # endif |
491 | |
492 | /* Find the last occurrence of C in S (same as strrchr). */ |
493 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
494 | extern "C++" |
495 | { |
496 | extern char *rindex (char *__s, int __c) |
497 | __THROW __asm ("rindex" ) __attribute_pure__ __nonnull ((1)); |
498 | extern const char *rindex (const char *__s, int __c) |
499 | __THROW __asm ("rindex" ) __attribute_pure__ __nonnull ((1)); |
500 | |
501 | # if defined __OPTIMIZE__ && !defined __CORRECT_ISO_CPP_STRINGS_H_PROTO |
502 | __extern_always_inline char * |
503 | rindex (char *__s, int __c) __THROW |
504 | { |
505 | return __builtin_rindex (__s, __c); |
506 | } |
507 | |
508 | __extern_always_inline const char * |
509 | rindex (const char *__s, int __c) __THROW |
510 | { |
511 | return __builtin_rindex (__s, __c); |
512 | } |
513 | #endif |
514 | } |
515 | # else |
516 | extern char *rindex (const char *__s, int __c) |
517 | __THROW __attribute_pure__ __nonnull ((1)); |
518 | # endif |
519 | |
520 | /* Return the position of the first bit set in I, or 0 if none are set. |
521 | The least-significant bit is position 1, the most-significant 32. */ |
522 | extern int ffs (int __i) __THROW __attribute__ ((__const__)); |
523 | |
524 | /* The following two functions are non-standard but necessary for non-32 bit |
525 | platforms. */ |
526 | # ifdef __USE_GNU |
527 | extern int ffsl (long int __l) __THROW __attribute__ ((__const__)); |
528 | __extension__ extern int ffsll (long long int __ll) |
529 | __THROW __attribute__ ((__const__)); |
530 | # endif |
531 | |
532 | /* Compare S1 and S2, ignoring case. */ |
533 | extern int strcasecmp (const char *__s1, const char *__s2) |
534 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
535 | |
536 | /* Compare no more than N chars of S1 and S2, ignoring case. */ |
537 | extern int strncasecmp (const char *__s1, const char *__s2, size_t __n) |
538 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
539 | #endif /* Use misc. */ |
540 | |
541 | #ifdef __USE_GNU |
542 | /* Again versions of a few functions which use the given locale instead |
543 | of the global one. */ |
544 | extern int strcasecmp_l (const char *__s1, const char *__s2, |
545 | __locale_t __loc) |
546 | __THROW __attribute_pure__ __nonnull ((1, 2, 3)); |
547 | |
548 | extern int strncasecmp_l (const char *__s1, const char *__s2, |
549 | size_t __n, __locale_t __loc) |
550 | __THROW __attribute_pure__ __nonnull ((1, 2, 4)); |
551 | #endif |
552 | |
553 | #ifdef __USE_MISC |
554 | /* Return the next DELIM-delimited token from *STRINGP, |
555 | terminating it with a '\0', and update *STRINGP to point past it. */ |
556 | extern char *strsep (char **__restrict __stringp, |
557 | const char *__restrict __delim) |
558 | __THROW __nonnull ((1, 2)); |
559 | #endif |
560 | |
561 | #ifdef __USE_XOPEN2K8 |
562 | /* Return a string describing the meaning of the signal number in SIG. */ |
563 | extern char *strsignal (int __sig) __THROW; |
564 | |
565 | /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */ |
566 | extern char *__stpcpy (char *__restrict __dest, const char *__restrict __src) |
567 | __THROW __nonnull ((1, 2)); |
568 | extern char *stpcpy (char *__restrict __dest, const char *__restrict __src) |
569 | __THROW __nonnull ((1, 2)); |
570 | |
571 | /* Copy no more than N characters of SRC to DEST, returning the address of |
572 | the last character written into DEST. */ |
573 | extern char *__stpncpy (char *__restrict __dest, |
574 | const char *__restrict __src, size_t __n) |
575 | __THROW __nonnull ((1, 2)); |
576 | extern char *stpncpy (char *__restrict __dest, |
577 | const char *__restrict __src, size_t __n) |
578 | __THROW __nonnull ((1, 2)); |
579 | #endif |
580 | |
581 | #ifdef __USE_GNU |
582 | /* Compare S1 and S2 as strings holding name & indices/version numbers. */ |
583 | extern int strverscmp (const char *__s1, const char *__s2) |
584 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
585 | |
586 | /* Sautee STRING briskly. */ |
587 | extern char *strfry (char *__string) __THROW __nonnull ((1)); |
588 | |
589 | /* Frobnicate N bytes of S. */ |
590 | extern void *memfrob (void *__s, size_t __n) __THROW __nonnull ((1)); |
591 | |
592 | # ifndef basename |
593 | /* Return the file name within directory of FILENAME. We don't |
594 | declare the function if the `basename' macro is available (defined |
595 | in <libgen.h>) which makes the XPG version of this function |
596 | available. */ |
597 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
598 | extern "C++" char *basename (char *__filename) |
599 | __THROW __asm ("basename" ) __nonnull ((1)); |
600 | extern "C++" const char *basename (const char *__filename) |
601 | __THROW __asm ("basename" ) __nonnull ((1)); |
602 | # else |
603 | extern char *basename (const char *__filename) __THROW __nonnull ((1)); |
604 | # endif |
605 | # endif |
606 | #endif |
607 | |
608 | |
609 | #if __GNUC_PREREQ (3,4) |
610 | # if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ \ |
611 | && !defined __NO_INLINE__ && !defined __cplusplus |
612 | /* When using GNU CC we provide some optimized versions of selected |
613 | functions from this header. There are two kinds of optimizations: |
614 | |
615 | - machine-dependent optimizations, most probably using inline |
616 | assembler code; these might be quite expensive since the code |
617 | size can increase significantly. |
618 | These optimizations are not used unless the symbol |
619 | __USE_STRING_INLINES |
620 | is defined before including this header. |
621 | |
622 | - machine-independent optimizations which do not increase the |
623 | code size significantly and which optimize mainly situations |
624 | where one or more arguments are compile-time constants. |
625 | These optimizations are used always when the compiler is |
626 | taught to optimize. |
627 | |
628 | One can inhibit all optimizations by defining __NO_STRING_INLINES. */ |
629 | |
630 | /* Get the machine-dependent optimizations (if any). */ |
631 | # include <bits/string.h> |
632 | |
633 | /* These are generic optimizations which do not add too much inline code. */ |
634 | # include <bits/string2.h> |
635 | # endif |
636 | |
637 | # if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function |
638 | /* Functions with security checks. */ |
639 | # include <bits/string3.h> |
640 | # endif |
641 | #endif |
642 | |
643 | #if defined __USE_GNU && defined __OPTIMIZE__ \ |
644 | && defined __extern_always_inline && __GNUC_PREREQ (3,2) |
645 | # if !defined _FORCE_INLINES && !defined _HAVE_STRING_ARCH_mempcpy |
646 | |
647 | #define mempcpy(dest, src, n) __mempcpy_inline (dest, src, n) |
648 | #define __mempcpy(dest, src, n) __mempcpy_inline (dest, src, n) |
649 | |
650 | __extern_always_inline void * |
651 | __mempcpy_inline (void *__restrict __dest, |
652 | const void *__restrict __src, size_t __n) |
653 | { |
654 | return (char *) memcpy (__dest, __src, __n) + __n; |
655 | } |
656 | |
657 | # endif |
658 | #endif |
659 | |
660 | __END_DECLS |
661 | |
662 | #endif /* string.h */ |
663 | |