1 | /* Copyright (C) 1991-2024 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 | <https://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 | || __glibc_clang_prereq (3, 5)) |
38 | # define __CORRECT_ISO_CPP_STRING_H_PROTO |
39 | #endif |
40 | |
41 | |
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 | |
50 | /* Copy no more than N bytes of SRC to DEST, stopping when C is found. |
51 | Return the position in DEST one byte past where C was copied, |
52 | or NULL if C was not found in the first N bytes of SRC. */ |
53 | #if defined __USE_MISC || defined __USE_XOPEN || __GLIBC_USE (ISOC2X) |
54 | extern void *memccpy (void *__restrict __dest, const void *__restrict __src, |
55 | int __c, size_t __n) |
56 | __THROW __nonnull ((1, 2)) __attr_access ((__write_only__, 1, 4)); |
57 | #endif /* Misc || X/Open. */ |
58 | |
59 | |
60 | /* Set N bytes of S to C. */ |
61 | extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1)); |
62 | |
63 | /* Compare N bytes of S1 and S2. */ |
64 | extern int memcmp (const void *__s1, const void *__s2, size_t __n) |
65 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
66 | |
67 | /* Compare N bytes of S1 and S2. Return zero if S1 and S2 are equal. |
68 | Return some non-zero value otherwise. |
69 | |
70 | Essentially __memcmpeq has the exact same semantics as memcmp |
71 | except the return value is less constrained. memcmp is always a |
72 | correct implementation of __memcmpeq. As well !!memcmp, -memcmp, |
73 | or bcmp are correct implementations. |
74 | |
75 | __memcmpeq is meant to be used by compilers when memcmp return is |
76 | only used for its boolean value. |
77 | |
78 | __memcmpeq is declared only for use by compilers. Programs should |
79 | continue to use memcmp. */ |
80 | extern int __memcmpeq (const void *__s1, const void *__s2, size_t __n) |
81 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
82 | |
83 | /* Search N bytes of S for C. */ |
84 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
85 | extern "C++" |
86 | { |
87 | extern void *memchr (void *__s, int __c, size_t __n) |
88 | __THROW __asm ("memchr" ) __attribute_pure__ __nonnull ((1)); |
89 | extern const void *memchr (const void *__s, int __c, size_t __n) |
90 | __THROW __asm ("memchr" ) __attribute_pure__ __nonnull ((1)); |
91 | |
92 | # ifdef __OPTIMIZE__ |
93 | __extern_always_inline void * |
94 | memchr (void *__s, int __c, size_t __n) __THROW |
95 | { |
96 | return __builtin_memchr (__s, __c, __n); |
97 | } |
98 | |
99 | __extern_always_inline const void * |
100 | memchr (const void *__s, int __c, size_t __n) __THROW |
101 | { |
102 | return __builtin_memchr (__s, __c, __n); |
103 | } |
104 | # endif |
105 | } |
106 | #else |
107 | extern void *memchr (const void *__s, int __c, size_t __n) |
108 | __THROW __attribute_pure__ __nonnull ((1)); |
109 | #endif |
110 | |
111 | #ifdef __USE_GNU |
112 | /* Search in S for C. This is similar to `memchr' but there is no |
113 | length limit. */ |
114 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
115 | extern "C++" void *rawmemchr (void *__s, int __c) |
116 | __THROW __asm ("rawmemchr" ) __attribute_pure__ __nonnull ((1)); |
117 | extern "C++" const void *rawmemchr (const void *__s, int __c) |
118 | __THROW __asm ("rawmemchr" ) __attribute_pure__ __nonnull ((1)); |
119 | # else |
120 | extern void *rawmemchr (const void *__s, int __c) |
121 | __THROW __attribute_pure__ __nonnull ((1)); |
122 | # endif |
123 | |
124 | /* Search N bytes of S for the final occurrence of C. */ |
125 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
126 | extern "C++" void *memrchr (void *__s, int __c, size_t __n) |
127 | __THROW __asm ("memrchr" ) __attribute_pure__ __nonnull ((1)) |
128 | __attr_access ((__read_only__, 1, 3)); |
129 | extern "C++" const void *memrchr (const void *__s, int __c, size_t __n) |
130 | __THROW __asm ("memrchr" ) __attribute_pure__ __nonnull ((1)) |
131 | __attr_access ((__read_only__, 1, 3)); |
132 | # else |
133 | extern void *memrchr (const void *__s, int __c, size_t __n) |
134 | __THROW __attribute_pure__ __nonnull ((1)) |
135 | __attr_access ((__read_only__, 1, 3)); |
136 | # endif |
137 | #endif |
138 | |
139 | |
140 | /* Copy SRC to DEST. */ |
141 | extern char *strcpy (char *__restrict __dest, const char *__restrict __src) |
142 | __THROW __nonnull ((1, 2)); |
143 | /* Copy no more than N characters of SRC to DEST. */ |
144 | extern char *strncpy (char *__restrict __dest, |
145 | const char *__restrict __src, size_t __n) |
146 | __THROW __nonnull ((1, 2)); |
147 | |
148 | /* Append SRC onto DEST. */ |
149 | extern char *strcat (char *__restrict __dest, const char *__restrict __src) |
150 | __THROW __nonnull ((1, 2)); |
151 | /* Append no more than N characters from SRC onto DEST. */ |
152 | extern char *strncat (char *__restrict __dest, const char *__restrict __src, |
153 | size_t __n) __THROW __nonnull ((1, 2)); |
154 | |
155 | /* Compare S1 and S2. */ |
156 | extern int strcmp (const char *__s1, const char *__s2) |
157 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
158 | /* Compare N characters of S1 and S2. */ |
159 | extern int strncmp (const char *__s1, const char *__s2, size_t __n) |
160 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
161 | |
162 | /* Compare the collated forms of S1 and S2. */ |
163 | extern int strcoll (const char *__s1, const char *__s2) |
164 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
165 | /* Put a transformation of SRC into no more than N bytes of DEST. */ |
166 | extern size_t strxfrm (char *__restrict __dest, |
167 | const char *__restrict __src, size_t __n) |
168 | __THROW __nonnull ((2)) __attr_access ((__write_only__, 1, 3)); |
169 | |
170 | #ifdef __USE_XOPEN2K8 |
171 | /* POSIX.1-2008 extended locale interface (see locale.h). */ |
172 | # include <bits/types/locale_t.h> |
173 | |
174 | /* Compare the collated forms of S1 and S2, using sorting rules from L. */ |
175 | extern int strcoll_l (const char *__s1, const char *__s2, locale_t __l) |
176 | __THROW __attribute_pure__ __nonnull ((1, 2, 3)); |
177 | /* Put a transformation of SRC into no more than N bytes of DEST, |
178 | using sorting rules from L. */ |
179 | extern size_t strxfrm_l (char *__dest, const char *__src, size_t __n, |
180 | locale_t __l) __THROW __nonnull ((2, 4)) |
181 | __attr_access ((__write_only__, 1, 3)); |
182 | #endif |
183 | |
184 | #if (defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 \ |
185 | || __GLIBC_USE (LIB_EXT2) || __GLIBC_USE (ISOC2X)) |
186 | /* Duplicate S, returning an identical malloc'd string. */ |
187 | extern char *strdup (const char *__s) |
188 | __THROW __attribute_malloc__ __nonnull ((1)); |
189 | #endif |
190 | |
191 | /* Return a malloc'd copy of at most N bytes of STRING. The |
192 | resultant string is terminated even if no null terminator |
193 | appears before STRING[N]. */ |
194 | #if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2) || __GLIBC_USE (ISOC2X) |
195 | extern char *strndup (const char *__string, size_t __n) |
196 | __THROW __attribute_malloc__ __nonnull ((1)); |
197 | #endif |
198 | |
199 | #if defined __USE_GNU && defined __GNUC__ |
200 | /* Duplicate S, returning an identical alloca'd string. */ |
201 | # define strdupa(s) \ |
202 | (__extension__ \ |
203 | ({ \ |
204 | const char *__old = (s); \ |
205 | size_t __len = strlen (__old) + 1; \ |
206 | char *__new = (char *) __builtin_alloca (__len); \ |
207 | (char *) memcpy (__new, __old, __len); \ |
208 | })) |
209 | |
210 | /* Return an alloca'd copy of at most N bytes of string. */ |
211 | # define strndupa(s, n) \ |
212 | (__extension__ \ |
213 | ({ \ |
214 | const char *__old = (s); \ |
215 | size_t __len = strnlen (__old, (n)); \ |
216 | char *__new = (char *) __builtin_alloca (__len + 1); \ |
217 | __new[__len] = '\0'; \ |
218 | (char *) memcpy (__new, __old, __len); \ |
219 | })) |
220 | #endif |
221 | |
222 | /* Find the first occurrence of C in S. */ |
223 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
224 | extern "C++" |
225 | { |
226 | extern char *strchr (char *__s, int __c) |
227 | __THROW __asm ("strchr" ) __attribute_pure__ __nonnull ((1)); |
228 | extern const char *strchr (const char *__s, int __c) |
229 | __THROW __asm ("strchr" ) __attribute_pure__ __nonnull ((1)); |
230 | |
231 | # ifdef __OPTIMIZE__ |
232 | __extern_always_inline char * |
233 | strchr (char *__s, int __c) __THROW |
234 | { |
235 | return __builtin_strchr (__s, __c); |
236 | } |
237 | |
238 | __extern_always_inline const char * |
239 | strchr (const char *__s, int __c) __THROW |
240 | { |
241 | return __builtin_strchr (__s, __c); |
242 | } |
243 | # endif |
244 | } |
245 | #else |
246 | extern char *strchr (const char *__s, int __c) |
247 | __THROW __attribute_pure__ __nonnull ((1)); |
248 | #endif |
249 | /* Find the last occurrence of C in S. */ |
250 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
251 | extern "C++" |
252 | { |
253 | extern char *strrchr (char *__s, int __c) |
254 | __THROW __asm ("strrchr" ) __attribute_pure__ __nonnull ((1)); |
255 | extern const char *strrchr (const char *__s, int __c) |
256 | __THROW __asm ("strrchr" ) __attribute_pure__ __nonnull ((1)); |
257 | |
258 | # ifdef __OPTIMIZE__ |
259 | __extern_always_inline char * |
260 | strrchr (char *__s, int __c) __THROW |
261 | { |
262 | return __builtin_strrchr (__s, __c); |
263 | } |
264 | |
265 | __extern_always_inline const char * |
266 | strrchr (const char *__s, int __c) __THROW |
267 | { |
268 | return __builtin_strrchr (__s, __c); |
269 | } |
270 | # endif |
271 | } |
272 | #else |
273 | extern char *strrchr (const char *__s, int __c) |
274 | __THROW __attribute_pure__ __nonnull ((1)); |
275 | #endif |
276 | |
277 | #ifdef __USE_MISC |
278 | /* This function is similar to `strchr'. But it returns a pointer to |
279 | the closing NUL byte in case C is not found in S. */ |
280 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
281 | extern "C++" char *strchrnul (char *__s, int __c) |
282 | __THROW __asm ("strchrnul" ) __attribute_pure__ __nonnull ((1)); |
283 | extern "C++" const char *strchrnul (const char *__s, int __c) |
284 | __THROW __asm ("strchrnul" ) __attribute_pure__ __nonnull ((1)); |
285 | # else |
286 | extern char *strchrnul (const char *__s, int __c) |
287 | __THROW __attribute_pure__ __nonnull ((1)); |
288 | # endif |
289 | #endif |
290 | |
291 | /* Return the length of the initial segment of S which |
292 | consists entirely of characters not in REJECT. */ |
293 | extern size_t strcspn (const char *__s, const char *__reject) |
294 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
295 | /* Return the length of the initial segment of S which |
296 | consists entirely of characters in ACCEPT. */ |
297 | extern size_t strspn (const char *__s, const char *__accept) |
298 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
299 | /* Find the first occurrence in S of any character in ACCEPT. */ |
300 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
301 | extern "C++" |
302 | { |
303 | extern char *strpbrk (char *__s, const char *__accept) |
304 | __THROW __asm ("strpbrk" ) __attribute_pure__ __nonnull ((1, 2)); |
305 | extern const char *strpbrk (const char *__s, const char *__accept) |
306 | __THROW __asm ("strpbrk" ) __attribute_pure__ __nonnull ((1, 2)); |
307 | |
308 | # ifdef __OPTIMIZE__ |
309 | __extern_always_inline char * |
310 | strpbrk (char *__s, const char *__accept) __THROW |
311 | { |
312 | return __builtin_strpbrk (__s, __accept); |
313 | } |
314 | |
315 | __extern_always_inline const char * |
316 | strpbrk (const char *__s, const char *__accept) __THROW |
317 | { |
318 | return __builtin_strpbrk (__s, __accept); |
319 | } |
320 | # endif |
321 | } |
322 | #else |
323 | extern char *strpbrk (const char *__s, const char *__accept) |
324 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
325 | #endif |
326 | /* Find the first occurrence of NEEDLE in HAYSTACK. */ |
327 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
328 | extern "C++" |
329 | { |
330 | extern char *strstr (char *__haystack, const char *__needle) |
331 | __THROW __asm ("strstr" ) __attribute_pure__ __nonnull ((1, 2)); |
332 | extern const char *strstr (const char *__haystack, const char *__needle) |
333 | __THROW __asm ("strstr" ) __attribute_pure__ __nonnull ((1, 2)); |
334 | |
335 | # ifdef __OPTIMIZE__ |
336 | __extern_always_inline char * |
337 | strstr (char *__haystack, const char *__needle) __THROW |
338 | { |
339 | return __builtin_strstr (__haystack, __needle); |
340 | } |
341 | |
342 | __extern_always_inline const char * |
343 | strstr (const char *__haystack, const char *__needle) __THROW |
344 | { |
345 | return __builtin_strstr (__haystack, __needle); |
346 | } |
347 | # endif |
348 | } |
349 | #else |
350 | extern char *strstr (const char *__haystack, const char *__needle) |
351 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
352 | #endif |
353 | |
354 | |
355 | /* Divide S into tokens separated by characters in DELIM. */ |
356 | extern char *strtok (char *__restrict __s, const char *__restrict __delim) |
357 | __THROW __nonnull ((2)); |
358 | |
359 | /* Divide S into tokens separated by characters in DELIM. Information |
360 | passed between calls are stored in SAVE_PTR. */ |
361 | extern char *__strtok_r (char *__restrict __s, |
362 | const char *__restrict __delim, |
363 | char **__restrict __save_ptr) |
364 | __THROW __nonnull ((2, 3)); |
365 | #ifdef __USE_POSIX |
366 | extern char *strtok_r (char *__restrict __s, const char *__restrict __delim, |
367 | char **__restrict __save_ptr) |
368 | __THROW __nonnull ((2, 3)); |
369 | #endif |
370 | |
371 | #ifdef __USE_MISC |
372 | /* Similar to `strstr' but this function ignores the case of both strings. */ |
373 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
374 | extern "C++" char *strcasestr (char *__haystack, const char *__needle) |
375 | __THROW __asm ("strcasestr" ) __attribute_pure__ __nonnull ((1, 2)); |
376 | extern "C++" const char *strcasestr (const char *__haystack, |
377 | const char *__needle) |
378 | __THROW __asm ("strcasestr" ) __attribute_pure__ __nonnull ((1, 2)); |
379 | # else |
380 | extern char *strcasestr (const char *__haystack, const char *__needle) |
381 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
382 | # endif |
383 | #endif |
384 | |
385 | #ifdef __USE_MISC |
386 | /* Find the first occurrence of NEEDLE in HAYSTACK. |
387 | NEEDLE is NEEDLELEN bytes long; |
388 | HAYSTACK is HAYSTACKLEN bytes long. */ |
389 | extern void *memmem (const void *__haystack, size_t __haystacklen, |
390 | const void *__needle, size_t __needlelen) |
391 | __THROW __attribute_pure__ __nonnull ((1, 3)) |
392 | __attr_access ((__read_only__, 1, 2)) |
393 | __attr_access ((__read_only__, 3, 4)); |
394 | |
395 | /* Copy N bytes of SRC to DEST, return pointer to bytes after the |
396 | last written byte. */ |
397 | extern void *__mempcpy (void *__restrict __dest, |
398 | const void *__restrict __src, size_t __n) |
399 | __THROW __nonnull ((1, 2)); |
400 | extern void *mempcpy (void *__restrict __dest, |
401 | const void *__restrict __src, size_t __n) |
402 | __THROW __nonnull ((1, 2)); |
403 | #endif |
404 | |
405 | |
406 | /* Return the length of S. */ |
407 | extern size_t strlen (const char *__s) |
408 | __THROW __attribute_pure__ __nonnull ((1)); |
409 | |
410 | #ifdef __USE_XOPEN2K8 |
411 | /* Find the length of STRING, but scan at most MAXLEN characters. |
412 | If no '\0' terminator is found in that many characters, return MAXLEN. */ |
413 | extern size_t strnlen (const char *__string, size_t __maxlen) |
414 | __THROW __attribute_pure__ __nonnull ((1)); |
415 | #endif |
416 | |
417 | |
418 | /* Return a string describing the meaning of the `errno' code in ERRNUM. */ |
419 | extern char *strerror (int __errnum) __THROW; |
420 | #ifdef __USE_XOPEN2K |
421 | /* Reentrant version of `strerror'. |
422 | There are 2 flavors of `strerror_r', GNU which returns the string |
423 | and may or may not use the supplied temporary buffer and POSIX one |
424 | which fills the string into the buffer. |
425 | To use the POSIX version, -D_XOPEN_SOURCE=600 or -D_POSIX_C_SOURCE=200112L |
426 | without -D_GNU_SOURCE is needed, otherwise the GNU version is |
427 | preferred. */ |
428 | # if defined __USE_XOPEN2K && !defined __USE_GNU |
429 | /* Fill BUF with a string describing the meaning of the `errno' code in |
430 | ERRNUM. */ |
431 | # ifdef __REDIRECT_NTH |
432 | extern int __REDIRECT_NTH (strerror_r, |
433 | (int __errnum, char *__buf, size_t __buflen), |
434 | __xpg_strerror_r) __nonnull ((2)) |
435 | __attr_access ((__write_only__, 2, 3)); |
436 | # else |
437 | extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen) |
438 | __THROW __nonnull ((2)) __attr_access ((__write_only__, 2, 3)); |
439 | # define strerror_r __xpg_strerror_r |
440 | # endif |
441 | # else |
442 | /* If a temporary buffer is required, at most BUFLEN bytes of BUF will be |
443 | used. */ |
444 | extern char *strerror_r (int __errnum, char *__buf, size_t __buflen) |
445 | __THROW __nonnull ((2)) __wur __attr_access ((__write_only__, 2, 3)); |
446 | # endif |
447 | |
448 | # ifdef __USE_GNU |
449 | /* Return a string describing the meaning of tthe error in ERR. */ |
450 | extern const char *strerrordesc_np (int __err) __THROW; |
451 | /* Return a string with the error name in ERR. */ |
452 | extern const char *strerrorname_np (int __err) __THROW; |
453 | # endif |
454 | #endif |
455 | |
456 | #ifdef __USE_XOPEN2K8 |
457 | /* Translate error number to string according to the locale L. */ |
458 | extern char *strerror_l (int __errnum, locale_t __l) __THROW; |
459 | #endif |
460 | |
461 | #ifdef __USE_MISC |
462 | # include <strings.h> |
463 | |
464 | /* Set N bytes of S to 0. The compiler will not delete a call to this |
465 | function, even if S is dead after the call. */ |
466 | extern void explicit_bzero (void *__s, size_t __n) __THROW __nonnull ((1)) |
467 | __fortified_attr_access (__write_only__, 1, 2); |
468 | |
469 | /* Return the next DELIM-delimited token from *STRINGP, |
470 | terminating it with a '\0', and update *STRINGP to point past it. */ |
471 | extern char *strsep (char **__restrict __stringp, |
472 | const char *__restrict __delim) |
473 | __THROW __nonnull ((1, 2)); |
474 | #endif |
475 | |
476 | #ifdef __USE_XOPEN2K8 |
477 | /* Return a string describing the meaning of the signal number in SIG. */ |
478 | extern char *strsignal (int __sig) __THROW; |
479 | |
480 | # ifdef __USE_GNU |
481 | /* Return an abbreviation string for the signal number SIG. */ |
482 | extern const char *sigabbrev_np (int __sig) __THROW; |
483 | /* Return a string describing the meaning of the signal number in SIG, |
484 | the result is not translated. */ |
485 | extern const char *sigdescr_np (int __sig) __THROW; |
486 | # endif |
487 | |
488 | /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */ |
489 | extern char *__stpcpy (char *__restrict __dest, const char *__restrict __src) |
490 | __THROW __nonnull ((1, 2)); |
491 | extern char *stpcpy (char *__restrict __dest, const char *__restrict __src) |
492 | __THROW __nonnull ((1, 2)); |
493 | |
494 | /* Copy no more than N characters of SRC to DEST, returning the address of |
495 | the last character written into DEST. */ |
496 | extern char *__stpncpy (char *__restrict __dest, |
497 | const char *__restrict __src, size_t __n) |
498 | __THROW __nonnull ((1, 2)); |
499 | extern char *stpncpy (char *__restrict __dest, |
500 | const char *__restrict __src, size_t __n) |
501 | __THROW __nonnull ((1, 2)); |
502 | #endif |
503 | |
504 | #ifdef __USE_MISC |
505 | /* Copy at most N - 1 characters from SRC to DEST. */ |
506 | extern size_t strlcpy (char *__restrict __dest, |
507 | const char *__restrict __src, size_t __n) |
508 | __THROW __nonnull ((1, 2)) __attr_access ((__write_only__, 1, 3)); |
509 | |
510 | /* Append SRC to DEST, possibly with truncation to keep the total size |
511 | below N. */ |
512 | extern size_t strlcat (char *__restrict __dest, |
513 | const char *__restrict __src, size_t __n) |
514 | __THROW __nonnull ((1, 2)) __attr_access ((__read_write__, 1, 3)); |
515 | #endif |
516 | |
517 | #ifdef __USE_GNU |
518 | /* Compare S1 and S2 as strings holding name & indices/version numbers. */ |
519 | extern int strverscmp (const char *__s1, const char *__s2) |
520 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
521 | |
522 | /* Sautee STRING briskly. */ |
523 | extern char *strfry (char *__string) __THROW __nonnull ((1)); |
524 | |
525 | /* Frobnicate N bytes of S. */ |
526 | extern void *memfrob (void *__s, size_t __n) __THROW __nonnull ((1)) |
527 | __attr_access ((__read_write__, 1, 2)); |
528 | |
529 | # ifndef basename |
530 | /* Return the file name within directory of FILENAME. We don't |
531 | declare the function if the `basename' macro is available (defined |
532 | in <libgen.h>) which makes the XPG version of this function |
533 | available. */ |
534 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
535 | extern "C++" char *basename (char *__filename) |
536 | __THROW __asm ("basename" ) __nonnull ((1)); |
537 | extern "C++" const char *basename (const char *__filename) |
538 | __THROW __asm ("basename" ) __nonnull ((1)); |
539 | # else |
540 | extern char *basename (const char *__filename) __THROW __nonnull ((1)); |
541 | # endif |
542 | # endif |
543 | #endif |
544 | |
545 | #if __GNUC_PREREQ (3,4) |
546 | # if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function |
547 | /* Functions with security checks. */ |
548 | # include <bits/string_fortified.h> |
549 | # endif |
550 | #endif |
551 | |
552 | __END_DECLS |
553 | |
554 | #endif /* string.h */ |
555 | |