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d8387c7b | 1 | /* Copyright (C) 1991-1993,1995-2004,2007,2009 Free Software Foundation, Inc. |
ba1ffaa1 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
ba1ffaa1 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 8 | |
ba1ffaa1 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 AJ |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. */ | |
28f540f4 RM |
18 | |
19 | /* | |
d1646309 | 20 | * ISO C99 Standard: 7.21 String handling <string.h> |
28f540f4 RM |
21 | */ |
22 | ||
23 | #ifndef _STRING_H | |
28f540f4 | 24 | #define _STRING_H 1 |
5107cf1d | 25 | |
28f540f4 RM |
26 | #include <features.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 | ||
d8387c7b UD |
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 | ||
28f540f4 | 40 | |
7a5affeb | 41 | __BEGIN_NAMESPACE_STD |
28f540f4 | 42 | /* Copy N bytes of SRC to DEST. */ |
c1422e5b | 43 | extern void *memcpy (void *__restrict __dest, |
be27d08c UD |
44 | __const void *__restrict __src, size_t __n) |
45 | __THROW __nonnull ((1, 2)); | |
28f540f4 RM |
46 | /* Copy N bytes of SRC to DEST, guaranteeing |
47 | correct behavior for overlapping strings. */ | |
c1422e5b | 48 | extern void *memmove (void *__dest, __const void *__src, size_t __n) |
be27d08c | 49 | __THROW __nonnull ((1, 2)); |
7a5affeb | 50 | __END_NAMESPACE_STD |
28f540f4 RM |
51 | |
52 | /* Copy no more than N bytes of SRC to DEST, stopping when C is found. | |
53 | Return the position in DEST one byte past where C was copied, | |
54 | or NULL if C was not found in the first N bytes of SRC. */ | |
377a515b | 55 | #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN |
98cbe360 UD |
56 | extern void *memccpy (void *__restrict __dest, __const void *__restrict __src, |
57 | int __c, size_t __n) | |
be27d08c | 58 | __THROW __nonnull ((1, 2)); |
28f540f4 RM |
59 | #endif /* SVID. */ |
60 | ||
61 | ||
7a5affeb | 62 | __BEGIN_NAMESPACE_STD |
28f540f4 | 63 | /* Set N bytes of S to C. */ |
be27d08c | 64 | extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1)); |
28f540f4 RM |
65 | |
66 | /* Compare N bytes of S1 and S2. */ | |
c1422e5b | 67 | extern int memcmp (__const void *__s1, __const void *__s2, size_t __n) |
be27d08c | 68 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 RM |
69 | |
70 | /* Search N bytes of S for C. */ | |
d8387c7b UD |
71 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
72 | extern "C++" void *memchr (void *__s, int __c, size_t __n) | |
73 | __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1)); | |
74 | extern "C++" __const void *memchr (__const void *__s, int __c, size_t __n) | |
75 | __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1)); | |
76 | #else | |
ca5a4c3c | 77 | extern void *memchr (__const void *__s, int __c, size_t __n) |
be27d08c | 78 | __THROW __attribute_pure__ __nonnull ((1)); |
d8387c7b | 79 | #endif |
7a5affeb | 80 | __END_NAMESPACE_STD |
28f540f4 | 81 | |
482eec0d UD |
82 | #ifdef __USE_GNU |
83 | /* Search in S for C. This is similar to `memchr' but there is no | |
84 | length limit. */ | |
d8387c7b UD |
85 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
86 | extern "C++" void *rawmemchr (void *__s, int __c) | |
87 | __THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1)); | |
88 | extern "C++" __const void *rawmemchr (__const void *__s, int __c) | |
89 | __THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1)); | |
90 | # else | |
be27d08c UD |
91 | extern void *rawmemchr (__const void *__s, int __c) |
92 | __THROW __attribute_pure__ __nonnull ((1)); | |
d8387c7b | 93 | # endif |
ca747856 RM |
94 | |
95 | /* Search N bytes of S for the final occurrence of C. */ | |
d8387c7b UD |
96 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
97 | extern "C++" void *memrchr (void *__s, int __c, size_t __n) | |
98 | __THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1)); | |
99 | extern "C++" __const void *memrchr (__const void *__s, int __c, size_t __n) | |
100 | __THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1)); | |
101 | # else | |
ca5a4c3c | 102 | extern void *memrchr (__const void *__s, int __c, size_t __n) |
be27d08c | 103 | __THROW __attribute_pure__ __nonnull ((1)); |
d8387c7b | 104 | # endif |
482eec0d UD |
105 | #endif |
106 | ||
28f540f4 | 107 | |
7a5affeb | 108 | __BEGIN_NAMESPACE_STD |
28f540f4 | 109 | /* Copy SRC to DEST. */ |
c1422e5b | 110 | extern char *strcpy (char *__restrict __dest, __const char *__restrict __src) |
be27d08c | 111 | __THROW __nonnull ((1, 2)); |
28f540f4 | 112 | /* Copy no more than N characters of SRC to DEST. */ |
c1422e5b | 113 | extern char *strncpy (char *__restrict __dest, |
be27d08c UD |
114 | __const char *__restrict __src, size_t __n) |
115 | __THROW __nonnull ((1, 2)); | |
28f540f4 RM |
116 | |
117 | /* Append SRC onto DEST. */ | |
c1422e5b | 118 | extern char *strcat (char *__restrict __dest, __const char *__restrict __src) |
be27d08c | 119 | __THROW __nonnull ((1, 2)); |
28f540f4 | 120 | /* Append no more than N characters from SRC onto DEST. */ |
c1422e5b | 121 | extern char *strncat (char *__restrict __dest, __const char *__restrict __src, |
be27d08c | 122 | size_t __n) __THROW __nonnull ((1, 2)); |
28f540f4 RM |
123 | |
124 | /* Compare S1 and S2. */ | |
ca5a4c3c | 125 | extern int strcmp (__const char *__s1, __const char *__s2) |
be27d08c | 126 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 | 127 | /* Compare N characters of S1 and S2. */ |
c1422e5b | 128 | extern int strncmp (__const char *__s1, __const char *__s2, size_t __n) |
be27d08c | 129 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 RM |
130 | |
131 | /* Compare the collated forms of S1 and S2. */ | |
ca5a4c3c | 132 | extern int strcoll (__const char *__s1, __const char *__s2) |
be27d08c | 133 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 | 134 | /* Put a transformation of SRC into no more than N bytes of DEST. */ |
c1422e5b | 135 | extern size_t strxfrm (char *__restrict __dest, |
be27d08c UD |
136 | __const char *__restrict __src, size_t __n) |
137 | __THROW __nonnull ((2)); | |
7a5affeb | 138 | __END_NAMESPACE_STD |
28f540f4 | 139 | |
c84142e8 UD |
140 | #ifdef __USE_GNU |
141 | /* The following functions are equivalent to the both above but they | |
142 | take the locale they use for the collation as an extra argument. | |
143 | This is not standardsized but something like will come. */ | |
144 | # include <xlocale.h> | |
145 | ||
146 | /* Compare the collated forms of S1 and S2 using rules from L. */ | |
1ab62b32 | 147 | extern int strcoll_l (__const char *__s1, __const char *__s2, __locale_t __l) |
be27d08c | 148 | __THROW __attribute_pure__ __nonnull ((1, 2, 3)); |
c84142e8 | 149 | /* Put a transformation of SRC into no more than N bytes of DEST. */ |
1ab62b32 | 150 | extern size_t strxfrm_l (char *__dest, __const char *__src, size_t __n, |
be27d08c | 151 | __locale_t __l) __THROW __nonnull ((2, 4)); |
c84142e8 UD |
152 | #endif |
153 | ||
377a515b | 154 | #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED |
28f540f4 | 155 | /* Duplicate S, returning an identical malloc'd string. */ |
be27d08c UD |
156 | extern char *strdup (__const char *__s) |
157 | __THROW __attribute_malloc__ __nonnull ((1)); | |
28f540f4 RM |
158 | #endif |
159 | ||
6dbe2837 RM |
160 | /* Return a malloc'd copy of at most N bytes of STRING. The |
161 | resultant string is terminated even if no null terminator | |
162 | appears before STRING[N]. */ | |
377a515b | 163 | #if defined __USE_GNU |
e9e9b245 | 164 | extern char *strndup (__const char *__string, size_t __n) |
be27d08c | 165 | __THROW __attribute_malloc__ __nonnull ((1)); |
6d52618b | 166 | #endif |
6dbe2837 | 167 | |
377a515b | 168 | #if defined __USE_GNU && defined __GNUC__ |
036cc82f | 169 | /* Duplicate S, returning an identical alloca'd string. */ |
3996f34b | 170 | # define strdupa(s) \ |
036cc82f RM |
171 | (__extension__ \ |
172 | ({ \ | |
173 | __const char *__old = (s); \ | |
174 | size_t __len = strlen (__old) + 1; \ | |
8c8f3704 | 175 | char *__new = (char *) __builtin_alloca (__len); \ |
3996f34b | 176 | (char *) memcpy (__new, __old, __len); \ |
036cc82f RM |
177 | })) |
178 | ||
6dbe2837 | 179 | /* Return an alloca'd copy of at most N bytes of string. */ |
3996f34b | 180 | # define strndupa(s, n) \ |
036cc82f RM |
181 | (__extension__ \ |
182 | ({ \ | |
183 | __const char *__old = (s); \ | |
184 | size_t __len = strnlen (__old, (n)); \ | |
8c8f3704 | 185 | char *__new = (char *) __builtin_alloca (__len + 1); \ |
036cc82f | 186 | __new[__len] = '\0'; \ |
3996f34b | 187 | (char *) memcpy (__new, __old, __len); \ |
036cc82f | 188 | })) |
02ac66c5 RM |
189 | #endif |
190 | ||
7a5affeb | 191 | __BEGIN_NAMESPACE_STD |
28f540f4 | 192 | /* Find the first occurrence of C in S. */ |
d8387c7b UD |
193 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
194 | extern "C++" char *strchr (char *__s, int __c) | |
195 | __THROW __asm ("strchr") __attribute_pure__ __nonnull ((1)); | |
196 | extern "C++" __const char *strchr (__const char *__s, int __c) | |
197 | __THROW __asm ("strchr") __attribute_pure__ __nonnull ((1)); | |
198 | #else | |
be27d08c UD |
199 | extern char *strchr (__const char *__s, int __c) |
200 | __THROW __attribute_pure__ __nonnull ((1)); | |
d8387c7b | 201 | #endif |
28f540f4 | 202 | /* Find the last occurrence of C in S. */ |
d8387c7b UD |
203 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
204 | extern "C++" char *strrchr (char *__s, int __c) | |
205 | __THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1)); | |
206 | extern "C++" __const char *strrchr (__const char *__s, int __c) | |
207 | __THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1)); | |
208 | #else | |
be27d08c UD |
209 | extern char *strrchr (__const char *__s, int __c) |
210 | __THROW __attribute_pure__ __nonnull ((1)); | |
d8387c7b | 211 | #endif |
7a5affeb | 212 | __END_NAMESPACE_STD |
28f540f4 | 213 | |
c4563d2d | 214 | #ifdef __USE_GNU |
557a9213 | 215 | /* This function is similar to `strchr'. But it returns a pointer to |
c4563d2d | 216 | the closing NUL byte in case C is not found in S. */ |
d8387c7b UD |
217 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
218 | extern "C++" char *strchrnul (char *__s, int __c) | |
219 | __THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1)); | |
220 | extern "C++" __const char *strchrnul (__const char *__s, int __c) | |
221 | __THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1)); | |
222 | # else | |
be27d08c UD |
223 | extern char *strchrnul (__const char *__s, int __c) |
224 | __THROW __attribute_pure__ __nonnull ((1)); | |
d8387c7b | 225 | # endif |
c4563d2d UD |
226 | #endif |
227 | ||
7a5affeb | 228 | __BEGIN_NAMESPACE_STD |
28f540f4 RM |
229 | /* Return the length of the initial segment of S which |
230 | consists entirely of characters not in REJECT. */ | |
ca5a4c3c | 231 | extern size_t strcspn (__const char *__s, __const char *__reject) |
be27d08c | 232 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 RM |
233 | /* Return the length of the initial segment of S which |
234 | consists entirely of characters in ACCEPT. */ | |
ca5a4c3c | 235 | extern size_t strspn (__const char *__s, __const char *__accept) |
be27d08c | 236 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
6d52618b | 237 | /* Find the first occurrence in S of any character in ACCEPT. */ |
d8387c7b UD |
238 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
239 | extern "C++" char *strpbrk (char *__s, __const char *__accept) | |
240 | __THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2)); | |
241 | extern "C++" __const char *strpbrk (__const char *__s, __const char *__accept) | |
242 | __THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2)); | |
243 | #else | |
ca5a4c3c | 244 | extern char *strpbrk (__const char *__s, __const char *__accept) |
be27d08c | 245 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
d8387c7b | 246 | #endif |
6d52618b | 247 | /* Find the first occurrence of NEEDLE in HAYSTACK. */ |
d8387c7b UD |
248 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
249 | extern "C++" char *strstr (char *__haystack, __const char *__needle) | |
250 | __THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2)); | |
251 | extern "C++" __const char *strstr (__const char *__haystack, | |
252 | __const char *__needle) | |
253 | __THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2)); | |
254 | #else | |
ca5a4c3c | 255 | extern char *strstr (__const char *__haystack, __const char *__needle) |
be27d08c | 256 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
d8387c7b | 257 | #endif |
f4017d20 | 258 | |
f4017d20 | 259 | |
28f540f4 | 260 | /* Divide S into tokens separated by characters in DELIM. */ |
c1422e5b | 261 | extern char *strtok (char *__restrict __s, __const char *__restrict __delim) |
be27d08c | 262 | __THROW __nonnull ((2)); |
7a5affeb | 263 | __END_NAMESPACE_STD |
28f540f4 | 264 | |
59dd8641 RM |
265 | /* Divide S into tokens separated by characters in DELIM. Information |
266 | passed between calls are stored in SAVE_PTR. */ | |
c1422e5b UD |
267 | extern char *__strtok_r (char *__restrict __s, |
268 | __const char *__restrict __delim, | |
be27d08c UD |
269 | char **__restrict __save_ptr) |
270 | __THROW __nonnull ((2, 3)); | |
89a9e37b | 271 | #if defined __USE_POSIX || defined __USE_MISC |
c1422e5b | 272 | extern char *strtok_r (char *__restrict __s, __const char *__restrict __delim, |
be27d08c UD |
273 | char **__restrict __save_ptr) |
274 | __THROW __nonnull ((2, 3)); | |
9d187dd4 | 275 | #endif |
59dd8641 | 276 | |
7a5affeb UD |
277 | #ifdef __USE_GNU |
278 | /* Similar to `strstr' but this function ignores the case of both strings. */ | |
d8387c7b UD |
279 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
280 | extern "C++" char *strcasestr (char *__haystack, __const char *__needle) | |
281 | __THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2)); | |
282 | extern "C++" __const char *strcasestr (__const char *__haystack, | |
283 | __const char *__needle) | |
284 | __THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2)); | |
285 | # else | |
7a5affeb | 286 | extern char *strcasestr (__const char *__haystack, __const char *__needle) |
be27d08c | 287 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
d8387c7b | 288 | # endif |
7a5affeb UD |
289 | #endif |
290 | ||
9d187dd4 | 291 | #ifdef __USE_GNU |
6d52618b | 292 | /* Find the first occurrence of NEEDLE in HAYSTACK. |
28f540f4 RM |
293 | NEEDLE is NEEDLELEN bytes long; |
294 | HAYSTACK is HAYSTACKLEN bytes long. */ | |
c1422e5b | 295 | extern void *memmem (__const void *__haystack, size_t __haystacklen, |
ca5a4c3c | 296 | __const void *__needle, size_t __needlelen) |
be27d08c | 297 | __THROW __attribute_pure__ __nonnull ((1, 3)); |
9a0a462c UD |
298 | |
299 | /* Copy N bytes of SRC to DEST, return pointer to bytes after the | |
300 | last written byte. */ | |
c1422e5b | 301 | extern void *__mempcpy (void *__restrict __dest, |
be27d08c UD |
302 | __const void *__restrict __src, size_t __n) |
303 | __THROW __nonnull ((1, 2)); | |
c1422e5b | 304 | extern void *mempcpy (void *__restrict __dest, |
be27d08c UD |
305 | __const void *__restrict __src, size_t __n) |
306 | __THROW __nonnull ((1, 2)); | |
28f540f4 RM |
307 | #endif |
308 | ||
8d71c7b0 | 309 | |
7a5affeb | 310 | __BEGIN_NAMESPACE_STD |
28f540f4 | 311 | /* Return the length of S. */ |
be27d08c UD |
312 | extern size_t strlen (__const char *__s) |
313 | __THROW __attribute_pure__ __nonnull ((1)); | |
7a5affeb | 314 | __END_NAMESPACE_STD |
28f540f4 | 315 | |
8d71c7b0 RM |
316 | #ifdef __USE_GNU |
317 | /* Find the length of STRING, but scan at most MAXLEN characters. | |
318 | If no '\0' terminator is found in that many characters, return MAXLEN. */ | |
ca5a4c3c | 319 | extern size_t strnlen (__const char *__string, size_t __maxlen) |
be27d08c | 320 | __THROW __attribute_pure__ __nonnull ((1)); |
8d71c7b0 RM |
321 | #endif |
322 | ||
323 | ||
7a5affeb | 324 | __BEGIN_NAMESPACE_STD |
73299943 UD |
325 | /* Return a string describing the meaning of the `errno' code in ERRNUM. */ |
326 | extern char *strerror (int __errnum) __THROW; | |
7a5affeb | 327 | __END_NAMESPACE_STD |
47cbdebd | 328 | #if defined __USE_XOPEN2K || defined __USE_MISC |
61645263 UD |
329 | /* Reentrant version of `strerror'. |
330 | There are 2 flavors of `strerror_r', GNU which returns the string | |
331 | and may or may not use the supplied temporary buffer and POSIX one | |
332 | which fills the string into the buffer. | |
333 | To use the POSIX version, -D_XOPEN_SOURCE=600 or -D_POSIX_C_SOURCE=200112L | |
334 | without -D_GNU_SOURCE is needed, otherwise the GNU version is | |
335 | preferred. */ | |
336 | # if defined __USE_XOPEN2K && !defined __USE_GNU | |
337 | /* Fill BUF with a string describing the meaning of the `errno' code in | |
338 | ERRNUM. */ | |
f377d022 UD |
339 | # ifdef __REDIRECT_NTH |
340 | extern int __REDIRECT_NTH (strerror_r, | |
341 | (int __errnum, char *__buf, size_t __buflen), | |
be27d08c | 342 | __xpg_strerror_r) __nonnull ((2)); |
61645263 UD |
343 | # else |
344 | extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen) | |
be27d08c | 345 | __THROW __nonnull ((2)); |
61645263 UD |
346 | # define strerror_r __xpg_strerror_r |
347 | # endif | |
348 | # else | |
349 | /* If a temporary buffer is required, at most BUFLEN bytes of BUF will be | |
350 | used. */ | |
be27d08c UD |
351 | extern char *strerror_r (int __errnum, char *__buf, size_t __buflen) |
352 | __THROW __nonnull ((2)); | |
61645263 | 353 | # endif |
60478656 | 354 | #endif |
28f540f4 | 355 | |
4a44ce79 UD |
356 | #ifdef __USE_GNU |
357 | /* Translate error number to string according to the locale L. */ | |
358 | extern char *strerror_l (int __errnum, __locale_t __l) __THROW; | |
359 | #endif | |
360 | ||
361 | ||
61eb22d3 UD |
362 | /* We define this function always since `bzero' is sometimes needed when |
363 | the namespace rules does not allow this. */ | |
be27d08c | 364 | extern void __bzero (void *__s, size_t __n) __THROW __nonnull ((1)); |
61eb22d3 | 365 | |
47cbdebd | 366 | #ifdef __USE_BSD |
28f540f4 | 367 | /* Copy N bytes of SRC to DEST (like memmove, but args reversed). */ |
be27d08c UD |
368 | extern void bcopy (__const void *__src, void *__dest, size_t __n) |
369 | __THROW __nonnull ((1, 2)); | |
28f540f4 RM |
370 | |
371 | /* Set N bytes of S to 0. */ | |
be27d08c | 372 | extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1)); |
28f540f4 RM |
373 | |
374 | /* Compare N bytes of S1 and S2 (same as memcmp). */ | |
ca5a4c3c | 375 | extern int bcmp (__const void *__s1, __const void *__s2, size_t __n) |
be27d08c | 376 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 | 377 | |
2c6fe0bd | 378 | /* Find the first occurrence of C in S (same as strchr). */ |
d8387c7b UD |
379 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
380 | extern "C++" char *index (char *__s, int __c) | |
381 | __THROW __asm ("index") __attribute_pure__ __nonnull ((1)); | |
382 | extern "C++" __const char *index (__const char *__s, int __c) | |
383 | __THROW __asm ("index") __attribute_pure__ __nonnull ((1)); | |
384 | # else | |
be27d08c UD |
385 | extern char *index (__const char *__s, int __c) |
386 | __THROW __attribute_pure__ __nonnull ((1)); | |
d8387c7b | 387 | # endif |
2c6fe0bd UD |
388 | |
389 | /* Find the last occurrence of C in S (same as strrchr). */ | |
d8387c7b UD |
390 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
391 | extern "C++" char *rindex (char *__s, int __c) | |
392 | __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1)); | |
393 | extern "C++" __const char *rindex (__const char *__s, int __c) | |
394 | __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1)); | |
395 | # else | |
be27d08c UD |
396 | extern char *rindex (__const char *__s, int __c) |
397 | __THROW __attribute_pure__ __nonnull ((1)); | |
d8387c7b | 398 | # endif |
2c6fe0bd | 399 | |
28f540f4 RM |
400 | /* Return the position of the first bit set in I, or 0 if none are set. |
401 | The least-significant bit is position 1, the most-significant 32. */ | |
976da847 | 402 | extern int ffs (int __i) __THROW __attribute__ ((__const__)); |
bdd421cc UD |
403 | |
404 | /* The following two functions are non-standard but necessary for non-32 bit | |
405 | platforms. */ | |
406 | # ifdef __USE_GNU | |
976da847 | 407 | extern int ffsl (long int __l) __THROW __attribute__ ((__const__)); |
bdd421cc | 408 | # ifdef __GNUC__ |
c1422e5b | 409 | __extension__ extern int ffsll (long long int __ll) |
976da847 | 410 | __THROW __attribute__ ((__const__)); |
bdd421cc UD |
411 | # endif |
412 | # endif | |
28f540f4 RM |
413 | |
414 | /* Compare S1 and S2, ignoring case. */ | |
ca5a4c3c | 415 | extern int strcasecmp (__const char *__s1, __const char *__s2) |
be27d08c | 416 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 | 417 | |
6e86a7c2 | 418 | /* Compare no more than N chars of S1 and S2, ignoring case. */ |
c1422e5b | 419 | extern int strncasecmp (__const char *__s1, __const char *__s2, size_t __n) |
be27d08c | 420 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
002e2dc4 | 421 | #endif /* Use BSD. */ |
6e86a7c2 | 422 | |
0501d603 UD |
423 | #ifdef __USE_GNU |
424 | /* Again versions of a few functions which use the given locale instead | |
425 | of the global one. */ | |
1ab62b32 | 426 | extern int strcasecmp_l (__const char *__s1, __const char *__s2, |
be27d08c UD |
427 | __locale_t __loc) |
428 | __THROW __attribute_pure__ __nonnull ((1, 2, 3)); | |
0501d603 | 429 | |
1ab62b32 RM |
430 | extern int strncasecmp_l (__const char *__s1, __const char *__s2, |
431 | size_t __n, __locale_t __loc) | |
be27d08c | 432 | __THROW __attribute_pure__ __nonnull ((1, 2, 4)); |
0501d603 UD |
433 | #endif |
434 | ||
2c6fe0bd | 435 | #ifdef __USE_BSD |
28f540f4 RM |
436 | /* Return the next DELIM-delimited token from *STRINGP, |
437 | terminating it with a '\0', and update *STRINGP to point past it. */ | |
c1422e5b | 438 | extern char *strsep (char **__restrict __stringp, |
be27d08c UD |
439 | __const char *__restrict __delim) |
440 | __THROW __nonnull ((1, 2)); | |
28f540f4 RM |
441 | #endif |
442 | ||
28f540f4 | 443 | #ifdef __USE_GNU |
1f205a47 | 444 | /* Compare S1 and S2 as strings holding name & indices/version numbers. */ |
ca5a4c3c | 445 | extern int strverscmp (__const char *__s1, __const char *__s2) |
be27d08c | 446 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
1f205a47 | 447 | |
28f540f4 | 448 | /* Return a string describing the meaning of the signal number in SIG. */ |
c1422e5b | 449 | extern char *strsignal (int __sig) __THROW; |
28f540f4 RM |
450 | |
451 | /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */ | |
c1422e5b | 452 | extern char *__stpcpy (char *__restrict __dest, __const char *__restrict __src) |
be27d08c | 453 | __THROW __nonnull ((1, 2)); |
c1422e5b | 454 | extern char *stpcpy (char *__restrict __dest, __const char *__restrict __src) |
be27d08c | 455 | __THROW __nonnull ((1, 2)); |
28f540f4 RM |
456 | |
457 | /* Copy no more than N characters of SRC to DEST, returning the address of | |
458 | the last character written into DEST. */ | |
c1422e5b | 459 | extern char *__stpncpy (char *__restrict __dest, |
be27d08c UD |
460 | __const char *__restrict __src, size_t __n) |
461 | __THROW __nonnull ((1, 2)); | |
c1422e5b | 462 | extern char *stpncpy (char *__restrict __dest, |
be27d08c UD |
463 | __const char *__restrict __src, size_t __n) |
464 | __THROW __nonnull ((1, 2)); | |
28f540f4 | 465 | |
28f540f4 | 466 | /* Sautee STRING briskly. */ |
be27d08c | 467 | extern char *strfry (char *__string) __THROW __nonnull ((1)); |
28f540f4 RM |
468 | |
469 | /* Frobnicate N bytes of S. */ | |
be27d08c | 470 | extern void *memfrob (void *__s, size_t __n) __THROW __nonnull ((1)); |
28f540f4 | 471 | |
92f1da4d | 472 | # ifndef basename |
dd33e89f UD |
473 | /* Return the file name within directory of FILENAME. We don't |
474 | declare the function if the `basename' macro is available (defined | |
475 | in <libgen.h>) which makes the XPG version of this function | |
476 | available. */ | |
d8387c7b UD |
477 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
478 | extern "C++" char *basename (char *__filename) | |
479 | __THROW __asm ("basename") __nonnull ((1)); | |
480 | extern "C++" __const char *basename (__const char *__filename) | |
481 | __THROW __asm ("basename") __nonnull ((1)); | |
482 | # else | |
be27d08c | 483 | extern char *basename (__const char *__filename) __THROW __nonnull ((1)); |
d8387c7b | 484 | # endif |
92f1da4d | 485 | # endif |
84724245 RM |
486 | #endif |
487 | ||
55c14926 | 488 | |
847a35a0 | 489 | #if defined __GNUC__ && __GNUC__ >= 2 |
07c416ed AJ |
490 | # if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ \ |
491 | && !defined __NO_INLINE__ && !defined __cplusplus | |
9a0a462c UD |
492 | /* When using GNU CC we provide some optimized versions of selected |
493 | functions from this header. There are two kinds of optimizations: | |
494 | ||
61952351 UD |
495 | - machine-dependent optimizations, most probably using inline |
496 | assembler code; these might be quite expensive since the code | |
497 | size can increase significantly. | |
9a0a462c UD |
498 | These optimizations are not used unless the symbol |
499 | __USE_STRING_INLINES | |
61952351 | 500 | is defined before including this header. |
9a0a462c UD |
501 | |
502 | - machine-independent optimizations which do not increase the | |
503 | code size significantly and which optimize mainly situations | |
504 | where one or more arguments are compile-time constants. | |
505 | These optimizations are used always when the compiler is | |
61952351 | 506 | taught to optimize. |
9a0a462c | 507 | |
61eb22d3 UD |
508 | One can inhibit all optimizations by defining __NO_STRING_INLINES. */ |
509 | ||
510 | /* Get the machine-dependent optimizations (if any). */ | |
847a35a0 | 511 | # include <bits/string.h> |
9a0a462c UD |
512 | |
513 | /* These are generic optimizations which do not add too much inline code. */ | |
847a35a0 UD |
514 | # include <bits/string2.h> |
515 | # endif | |
b5cc329c | 516 | |
de1c3ebb | 517 | # if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline |
b5cc329c UD |
518 | /* Functions with security checks. */ |
519 | # include <bits/string3.h> | |
520 | # endif | |
92f1da4d UD |
521 | #endif |
522 | ||
28f540f4 RM |
523 | __END_DECLS |
524 | ||
525 | #endif /* string.h */ |