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b168057a | 1 | /* Copyright (C) 1991-2015 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 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 RM |
17 | |
18 | /* | |
d1646309 | 19 | * ISO C99 Standard: 7.21 String handling <string.h> |
28f540f4 RM |
20 | */ |
21 | ||
22 | #ifndef _STRING_H | |
28f540f4 | 23 | #define _STRING_H 1 |
5107cf1d | 24 | |
28f540f4 RM |
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 | ||
3f637079 BM |
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)) | |
d8387c7b UD |
40 | # define __CORRECT_ISO_CPP_STRING_H_PROTO |
41 | #endif | |
42 | ||
28f540f4 | 43 | |
7a5affeb | 44 | __BEGIN_NAMESPACE_STD |
28f540f4 | 45 | /* Copy N bytes of SRC to DEST. */ |
a784e502 UD |
46 | extern void *memcpy (void *__restrict __dest, const void *__restrict __src, |
47 | size_t __n) __THROW __nonnull ((1, 2)); | |
28f540f4 RM |
48 | /* Copy N bytes of SRC to DEST, guaranteeing |
49 | correct behavior for overlapping strings. */ | |
a784e502 | 50 | extern void *memmove (void *__dest, const void *__src, size_t __n) |
be27d08c | 51 | __THROW __nonnull ((1, 2)); |
7a5affeb | 52 | __END_NAMESPACE_STD |
28f540f4 RM |
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. */ | |
ed9a38e2 | 57 | #if defined __USE_MISC || defined __USE_XOPEN |
a784e502 | 58 | extern void *memccpy (void *__restrict __dest, const void *__restrict __src, |
98cbe360 | 59 | int __c, size_t __n) |
be27d08c | 60 | __THROW __nonnull ((1, 2)); |
acd7f096 | 61 | #endif /* Misc || X/Open. */ |
28f540f4 RM |
62 | |
63 | ||
7a5affeb | 64 | __BEGIN_NAMESPACE_STD |
28f540f4 | 65 | /* Set N bytes of S to C. */ |
be27d08c | 66 | extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1)); |
28f540f4 RM |
67 | |
68 | /* Compare N bytes of S1 and S2. */ | |
a784e502 | 69 | extern int memcmp (const void *__s1, const void *__s2, size_t __n) |
be27d08c | 70 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 RM |
71 | |
72 | /* Search N bytes of S for C. */ | |
d8387c7b | 73 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
8585cb74 UD |
74 | extern "C++" |
75 | { | |
76 | extern void *memchr (void *__s, int __c, size_t __n) | |
d8387c7b | 77 | __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1)); |
a784e502 | 78 | extern const void *memchr (const void *__s, int __c, size_t __n) |
d8387c7b | 79 | __THROW __asm ("memchr") __attribute_pure__ __nonnull ((1)); |
8585cb74 UD |
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 | ||
a784e502 UD |
88 | __extern_always_inline const void * |
89 | memchr (const void *__s, int __c, size_t __n) __THROW | |
8585cb74 UD |
90 | { |
91 | return __builtin_memchr (__s, __c, __n); | |
92 | } | |
93 | # endif | |
94 | } | |
d8387c7b | 95 | #else |
a784e502 | 96 | extern void *memchr (const void *__s, int __c, size_t __n) |
be27d08c | 97 | __THROW __attribute_pure__ __nonnull ((1)); |
d8387c7b | 98 | #endif |
7a5affeb | 99 | __END_NAMESPACE_STD |
28f540f4 | 100 | |
482eec0d UD |
101 | #ifdef __USE_GNU |
102 | /* Search in S for C. This is similar to `memchr' but there is no | |
103 | length limit. */ | |
d8387c7b UD |
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)); | |
a784e502 | 107 | extern "C++" const void *rawmemchr (const void *__s, int __c) |
d8387c7b UD |
108 | __THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1)); |
109 | # else | |
a784e502 | 110 | extern void *rawmemchr (const void *__s, int __c) |
be27d08c | 111 | __THROW __attribute_pure__ __nonnull ((1)); |
d8387c7b | 112 | # endif |
ca747856 RM |
113 | |
114 | /* Search N bytes of S for the final occurrence of C. */ | |
d8387c7b UD |
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)); | |
a784e502 | 118 | extern "C++" const void *memrchr (const void *__s, int __c, size_t __n) |
d8387c7b UD |
119 | __THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1)); |
120 | # else | |
a784e502 | 121 | extern void *memrchr (const void *__s, int __c, size_t __n) |
be27d08c | 122 | __THROW __attribute_pure__ __nonnull ((1)); |
d8387c7b | 123 | # endif |
482eec0d UD |
124 | #endif |
125 | ||
28f540f4 | 126 | |
7a5affeb | 127 | __BEGIN_NAMESPACE_STD |
28f540f4 | 128 | /* Copy SRC to DEST. */ |
a784e502 | 129 | extern char *strcpy (char *__restrict __dest, const char *__restrict __src) |
be27d08c | 130 | __THROW __nonnull ((1, 2)); |
28f540f4 | 131 | /* Copy no more than N characters of SRC to DEST. */ |
c1422e5b | 132 | extern char *strncpy (char *__restrict __dest, |
a784e502 | 133 | const char *__restrict __src, size_t __n) |
be27d08c | 134 | __THROW __nonnull ((1, 2)); |
28f540f4 RM |
135 | |
136 | /* Append SRC onto DEST. */ | |
a784e502 | 137 | extern char *strcat (char *__restrict __dest, const char *__restrict __src) |
be27d08c | 138 | __THROW __nonnull ((1, 2)); |
28f540f4 | 139 | /* Append no more than N characters from SRC onto DEST. */ |
a784e502 | 140 | extern char *strncat (char *__restrict __dest, const char *__restrict __src, |
be27d08c | 141 | size_t __n) __THROW __nonnull ((1, 2)); |
28f540f4 RM |
142 | |
143 | /* Compare S1 and S2. */ | |
a784e502 | 144 | extern int strcmp (const char *__s1, const char *__s2) |
be27d08c | 145 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 | 146 | /* Compare N characters of S1 and S2. */ |
a784e502 | 147 | extern int strncmp (const char *__s1, const char *__s2, size_t __n) |
be27d08c | 148 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 RM |
149 | |
150 | /* Compare the collated forms of S1 and S2. */ | |
a784e502 | 151 | extern int strcoll (const char *__s1, const char *__s2) |
be27d08c | 152 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 | 153 | /* Put a transformation of SRC into no more than N bytes of DEST. */ |
c1422e5b | 154 | extern size_t strxfrm (char *__restrict __dest, |
a784e502 | 155 | const char *__restrict __src, size_t __n) |
be27d08c | 156 | __THROW __nonnull ((2)); |
7a5affeb | 157 | __END_NAMESPACE_STD |
28f540f4 | 158 | |
6cbe890a | 159 | #ifdef __USE_XOPEN2K8 |
c84142e8 UD |
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. */ | |
a784e502 | 166 | extern int strcoll_l (const char *__s1, const char *__s2, __locale_t __l) |
be27d08c | 167 | __THROW __attribute_pure__ __nonnull ((1, 2, 3)); |
c84142e8 | 168 | /* Put a transformation of SRC into no more than N bytes of DEST. */ |
a784e502 | 169 | extern size_t strxfrm_l (char *__dest, const char *__src, size_t __n, |
be27d08c | 170 | __locale_t __l) __THROW __nonnull ((2, 4)); |
c84142e8 UD |
171 | #endif |
172 | ||
acd7f096 | 173 | #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 |
28f540f4 | 174 | /* Duplicate S, returning an identical malloc'd string. */ |
a784e502 | 175 | extern char *strdup (const char *__s) |
be27d08c | 176 | __THROW __attribute_malloc__ __nonnull ((1)); |
28f540f4 RM |
177 | #endif |
178 | ||
6dbe2837 RM |
179 | /* Return a malloc'd copy of at most N bytes of STRING. The |
180 | resultant string is terminated even if no null terminator | |
181 | appears before STRING[N]. */ | |
6cbe890a | 182 | #if defined __USE_XOPEN2K8 |
a784e502 | 183 | extern char *strndup (const char *__string, size_t __n) |
be27d08c | 184 | __THROW __attribute_malloc__ __nonnull ((1)); |
6d52618b | 185 | #endif |
6dbe2837 | 186 | |
377a515b | 187 | #if defined __USE_GNU && defined __GNUC__ |
036cc82f | 188 | /* Duplicate S, returning an identical alloca'd string. */ |
3996f34b | 189 | # define strdupa(s) \ |
036cc82f RM |
190 | (__extension__ \ |
191 | ({ \ | |
a784e502 | 192 | const char *__old = (s); \ |
036cc82f | 193 | size_t __len = strlen (__old) + 1; \ |
8c8f3704 | 194 | char *__new = (char *) __builtin_alloca (__len); \ |
3996f34b | 195 | (char *) memcpy (__new, __old, __len); \ |
036cc82f RM |
196 | })) |
197 | ||
6dbe2837 | 198 | /* Return an alloca'd copy of at most N bytes of string. */ |
3996f34b | 199 | # define strndupa(s, n) \ |
036cc82f RM |
200 | (__extension__ \ |
201 | ({ \ | |
a784e502 | 202 | const char *__old = (s); \ |
036cc82f | 203 | size_t __len = strnlen (__old, (n)); \ |
8c8f3704 | 204 | char *__new = (char *) __builtin_alloca (__len + 1); \ |
036cc82f | 205 | __new[__len] = '\0'; \ |
3996f34b | 206 | (char *) memcpy (__new, __old, __len); \ |
036cc82f | 207 | })) |
02ac66c5 RM |
208 | #endif |
209 | ||
7a5affeb | 210 | __BEGIN_NAMESPACE_STD |
28f540f4 | 211 | /* Find the first occurrence of C in S. */ |
d8387c7b | 212 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
8585cb74 UD |
213 | extern "C++" |
214 | { | |
215 | extern char *strchr (char *__s, int __c) | |
d8387c7b | 216 | __THROW __asm ("strchr") __attribute_pure__ __nonnull ((1)); |
a784e502 | 217 | extern const char *strchr (const char *__s, int __c) |
d8387c7b | 218 | __THROW __asm ("strchr") __attribute_pure__ __nonnull ((1)); |
8585cb74 UD |
219 | |
220 | # ifdef __OPTIMIZE__ | |
221 | __extern_always_inline char * | |
222 | strchr (char *__s, int __c) __THROW | |
223 | { | |
224 | return __builtin_strchr (__s, __c); | |
225 | } | |
226 | ||
a784e502 UD |
227 | __extern_always_inline const char * |
228 | strchr (const char *__s, int __c) __THROW | |
8585cb74 UD |
229 | { |
230 | return __builtin_strchr (__s, __c); | |
231 | } | |
232 | # endif | |
233 | } | |
d8387c7b | 234 | #else |
a784e502 | 235 | extern char *strchr (const char *__s, int __c) |
be27d08c | 236 | __THROW __attribute_pure__ __nonnull ((1)); |
d8387c7b | 237 | #endif |
28f540f4 | 238 | /* Find the last occurrence of C in S. */ |
d8387c7b | 239 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
8585cb74 UD |
240 | extern "C++" |
241 | { | |
242 | extern char *strrchr (char *__s, int __c) | |
d8387c7b | 243 | __THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1)); |
a784e502 | 244 | extern const char *strrchr (const char *__s, int __c) |
d8387c7b | 245 | __THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1)); |
8585cb74 UD |
246 | |
247 | # ifdef __OPTIMIZE__ | |
248 | __extern_always_inline char * | |
249 | strrchr (char *__s, int __c) __THROW | |
250 | { | |
251 | return __builtin_strrchr (__s, __c); | |
252 | } | |
253 | ||
a784e502 UD |
254 | __extern_always_inline const char * |
255 | strrchr (const char *__s, int __c) __THROW | |
8585cb74 UD |
256 | { |
257 | return __builtin_strrchr (__s, __c); | |
258 | } | |
259 | # endif | |
260 | } | |
d8387c7b | 261 | #else |
a784e502 | 262 | extern char *strrchr (const char *__s, int __c) |
be27d08c | 263 | __THROW __attribute_pure__ __nonnull ((1)); |
d8387c7b | 264 | #endif |
7a5affeb | 265 | __END_NAMESPACE_STD |
28f540f4 | 266 | |
c4563d2d | 267 | #ifdef __USE_GNU |
557a9213 | 268 | /* This function is similar to `strchr'. But it returns a pointer to |
c4563d2d | 269 | the closing NUL byte in case C is not found in S. */ |
d8387c7b UD |
270 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
271 | extern "C++" char *strchrnul (char *__s, int __c) | |
272 | __THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1)); | |
a784e502 | 273 | extern "C++" const char *strchrnul (const char *__s, int __c) |
d8387c7b UD |
274 | __THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1)); |
275 | # else | |
a784e502 | 276 | extern char *strchrnul (const char *__s, int __c) |
be27d08c | 277 | __THROW __attribute_pure__ __nonnull ((1)); |
d8387c7b | 278 | # endif |
c4563d2d UD |
279 | #endif |
280 | ||
7a5affeb | 281 | __BEGIN_NAMESPACE_STD |
28f540f4 RM |
282 | /* Return the length of the initial segment of S which |
283 | consists entirely of characters not in REJECT. */ | |
a784e502 | 284 | extern size_t strcspn (const char *__s, const char *__reject) |
be27d08c | 285 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 RM |
286 | /* Return the length of the initial segment of S which |
287 | consists entirely of characters in ACCEPT. */ | |
a784e502 | 288 | extern size_t strspn (const char *__s, const char *__accept) |
be27d08c | 289 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
6d52618b | 290 | /* Find the first occurrence in S of any character in ACCEPT. */ |
d8387c7b | 291 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
8585cb74 UD |
292 | extern "C++" |
293 | { | |
a784e502 | 294 | extern char *strpbrk (char *__s, const char *__accept) |
d8387c7b | 295 | __THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2)); |
a784e502 | 296 | extern const char *strpbrk (const char *__s, const char *__accept) |
d8387c7b | 297 | __THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2)); |
8585cb74 UD |
298 | |
299 | # ifdef __OPTIMIZE__ | |
300 | __extern_always_inline char * | |
a784e502 | 301 | strpbrk (char *__s, const char *__accept) __THROW |
8585cb74 UD |
302 | { |
303 | return __builtin_strpbrk (__s, __accept); | |
304 | } | |
305 | ||
a784e502 UD |
306 | __extern_always_inline const char * |
307 | strpbrk (const char *__s, const char *__accept) __THROW | |
8585cb74 UD |
308 | { |
309 | return __builtin_strpbrk (__s, __accept); | |
310 | } | |
311 | # endif | |
312 | } | |
d8387c7b | 313 | #else |
a784e502 | 314 | extern char *strpbrk (const char *__s, const char *__accept) |
be27d08c | 315 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
d8387c7b | 316 | #endif |
6d52618b | 317 | /* Find the first occurrence of NEEDLE in HAYSTACK. */ |
d8387c7b | 318 | #ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
8585cb74 UD |
319 | extern "C++" |
320 | { | |
a784e502 | 321 | extern char *strstr (char *__haystack, const char *__needle) |
d8387c7b | 322 | __THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2)); |
a784e502 | 323 | extern const char *strstr (const char *__haystack, const char *__needle) |
d8387c7b | 324 | __THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2)); |
8585cb74 UD |
325 | |
326 | # ifdef __OPTIMIZE__ | |
327 | __extern_always_inline char * | |
a784e502 | 328 | strstr (char *__haystack, const char *__needle) __THROW |
8585cb74 UD |
329 | { |
330 | return __builtin_strstr (__haystack, __needle); | |
331 | } | |
332 | ||
a784e502 UD |
333 | __extern_always_inline const char * |
334 | strstr (const char *__haystack, const char *__needle) __THROW | |
8585cb74 UD |
335 | { |
336 | return __builtin_strstr (__haystack, __needle); | |
337 | } | |
338 | # endif | |
339 | } | |
d8387c7b | 340 | #else |
a784e502 | 341 | extern char *strstr (const char *__haystack, const char *__needle) |
be27d08c | 342 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
d8387c7b | 343 | #endif |
f4017d20 | 344 | |
f4017d20 | 345 | |
28f540f4 | 346 | /* Divide S into tokens separated by characters in DELIM. */ |
a784e502 | 347 | extern char *strtok (char *__restrict __s, const char *__restrict __delim) |
be27d08c | 348 | __THROW __nonnull ((2)); |
7a5affeb | 349 | __END_NAMESPACE_STD |
28f540f4 | 350 | |
59dd8641 RM |
351 | /* Divide S into tokens separated by characters in DELIM. Information |
352 | passed between calls are stored in SAVE_PTR. */ | |
c1422e5b | 353 | extern char *__strtok_r (char *__restrict __s, |
a784e502 | 354 | const char *__restrict __delim, |
be27d08c UD |
355 | char **__restrict __save_ptr) |
356 | __THROW __nonnull ((2, 3)); | |
acd7f096 | 357 | #ifdef __USE_POSIX |
a784e502 | 358 | extern char *strtok_r (char *__restrict __s, const char *__restrict __delim, |
be27d08c UD |
359 | char **__restrict __save_ptr) |
360 | __THROW __nonnull ((2, 3)); | |
9d187dd4 | 361 | #endif |
59dd8641 | 362 | |
7a5affeb UD |
363 | #ifdef __USE_GNU |
364 | /* Similar to `strstr' but this function ignores the case of both strings. */ | |
d8387c7b | 365 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
a784e502 | 366 | extern "C++" char *strcasestr (char *__haystack, const char *__needle) |
d8387c7b | 367 | __THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2)); |
a784e502 UD |
368 | extern "C++" const char *strcasestr (const char *__haystack, |
369 | const char *__needle) | |
d8387c7b UD |
370 | __THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2)); |
371 | # else | |
a784e502 | 372 | extern char *strcasestr (const char *__haystack, const char *__needle) |
be27d08c | 373 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
d8387c7b | 374 | # endif |
7a5affeb UD |
375 | #endif |
376 | ||
9d187dd4 | 377 | #ifdef __USE_GNU |
6d52618b | 378 | /* Find the first occurrence of NEEDLE in HAYSTACK. |
28f540f4 RM |
379 | NEEDLE is NEEDLELEN bytes long; |
380 | HAYSTACK is HAYSTACKLEN bytes long. */ | |
a784e502 UD |
381 | extern void *memmem (const void *__haystack, size_t __haystacklen, |
382 | const void *__needle, size_t __needlelen) | |
be27d08c | 383 | __THROW __attribute_pure__ __nonnull ((1, 3)); |
9a0a462c UD |
384 | |
385 | /* Copy N bytes of SRC to DEST, return pointer to bytes after the | |
386 | last written byte. */ | |
c1422e5b | 387 | extern void *__mempcpy (void *__restrict __dest, |
a784e502 | 388 | const void *__restrict __src, size_t __n) |
be27d08c | 389 | __THROW __nonnull ((1, 2)); |
c1422e5b | 390 | extern void *mempcpy (void *__restrict __dest, |
a784e502 | 391 | const void *__restrict __src, size_t __n) |
be27d08c | 392 | __THROW __nonnull ((1, 2)); |
28f540f4 RM |
393 | #endif |
394 | ||
8d71c7b0 | 395 | |
7a5affeb | 396 | __BEGIN_NAMESPACE_STD |
28f540f4 | 397 | /* Return the length of S. */ |
a784e502 | 398 | extern size_t strlen (const char *__s) |
be27d08c | 399 | __THROW __attribute_pure__ __nonnull ((1)); |
7a5affeb | 400 | __END_NAMESPACE_STD |
28f540f4 | 401 | |
6cbe890a | 402 | #ifdef __USE_XOPEN2K8 |
8d71c7b0 RM |
403 | /* Find the length of STRING, but scan at most MAXLEN characters. |
404 | If no '\0' terminator is found in that many characters, return MAXLEN. */ | |
a784e502 | 405 | extern size_t strnlen (const char *__string, size_t __maxlen) |
be27d08c | 406 | __THROW __attribute_pure__ __nonnull ((1)); |
8d71c7b0 RM |
407 | #endif |
408 | ||
409 | ||
7a5affeb | 410 | __BEGIN_NAMESPACE_STD |
73299943 UD |
411 | /* Return a string describing the meaning of the `errno' code in ERRNUM. */ |
412 | extern char *strerror (int __errnum) __THROW; | |
7a5affeb | 413 | __END_NAMESPACE_STD |
acd7f096 | 414 | #ifdef __USE_XOPEN2K |
61645263 UD |
415 | /* Reentrant version of `strerror'. |
416 | There are 2 flavors of `strerror_r', GNU which returns the string | |
417 | and may or may not use the supplied temporary buffer and POSIX one | |
418 | which fills the string into the buffer. | |
419 | To use the POSIX version, -D_XOPEN_SOURCE=600 or -D_POSIX_C_SOURCE=200112L | |
420 | without -D_GNU_SOURCE is needed, otherwise the GNU version is | |
421 | preferred. */ | |
422 | # if defined __USE_XOPEN2K && !defined __USE_GNU | |
423 | /* Fill BUF with a string describing the meaning of the `errno' code in | |
424 | ERRNUM. */ | |
f377d022 UD |
425 | # ifdef __REDIRECT_NTH |
426 | extern int __REDIRECT_NTH (strerror_r, | |
427 | (int __errnum, char *__buf, size_t __buflen), | |
be27d08c | 428 | __xpg_strerror_r) __nonnull ((2)); |
61645263 UD |
429 | # else |
430 | extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen) | |
be27d08c | 431 | __THROW __nonnull ((2)); |
61645263 UD |
432 | # define strerror_r __xpg_strerror_r |
433 | # endif | |
434 | # else | |
435 | /* If a temporary buffer is required, at most BUFLEN bytes of BUF will be | |
436 | used. */ | |
be27d08c | 437 | extern char *strerror_r (int __errnum, char *__buf, size_t __buflen) |
a3aeac40 | 438 | __THROW __nonnull ((2)) __wur; |
61645263 | 439 | # endif |
60478656 | 440 | #endif |
28f540f4 | 441 | |
6cbe890a | 442 | #ifdef __USE_XOPEN2K8 |
4a44ce79 UD |
443 | /* Translate error number to string according to the locale L. */ |
444 | extern char *strerror_l (int __errnum, __locale_t __l) __THROW; | |
445 | #endif | |
446 | ||
447 | ||
61eb22d3 UD |
448 | /* We define this function always since `bzero' is sometimes needed when |
449 | the namespace rules does not allow this. */ | |
be27d08c | 450 | extern void __bzero (void *__s, size_t __n) __THROW __nonnull ((1)); |
61eb22d3 | 451 | |
498afc54 | 452 | #ifdef __USE_MISC |
28f540f4 | 453 | /* Copy N bytes of SRC to DEST (like memmove, but args reversed). */ |
a784e502 | 454 | extern void bcopy (const void *__src, void *__dest, size_t __n) |
be27d08c | 455 | __THROW __nonnull ((1, 2)); |
28f540f4 RM |
456 | |
457 | /* Set N bytes of S to 0. */ | |
be27d08c | 458 | extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1)); |
28f540f4 RM |
459 | |
460 | /* Compare N bytes of S1 and S2 (same as memcmp). */ | |
a784e502 | 461 | extern int bcmp (const void *__s1, const void *__s2, size_t __n) |
be27d08c | 462 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 | 463 | |
2c6fe0bd | 464 | /* Find the first occurrence of C in S (same as strchr). */ |
d8387c7b | 465 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
8585cb74 UD |
466 | extern "C++" |
467 | { | |
468 | extern char *index (char *__s, int __c) | |
d8387c7b | 469 | __THROW __asm ("index") __attribute_pure__ __nonnull ((1)); |
a784e502 | 470 | extern const char *index (const char *__s, int __c) |
d8387c7b | 471 | __THROW __asm ("index") __attribute_pure__ __nonnull ((1)); |
8585cb74 UD |
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 | ||
a784e502 UD |
480 | __extern_always_inline const char * |
481 | index (const char *__s, int __c) __THROW | |
8585cb74 UD |
482 | { |
483 | return __builtin_index (__s, __c); | |
484 | } | |
485 | # endif | |
486 | } | |
d8387c7b | 487 | # else |
a784e502 | 488 | extern char *index (const char *__s, int __c) |
be27d08c | 489 | __THROW __attribute_pure__ __nonnull ((1)); |
d8387c7b | 490 | # endif |
2c6fe0bd UD |
491 | |
492 | /* Find the last occurrence of C in S (same as strrchr). */ | |
d8387c7b | 493 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
8585cb74 UD |
494 | extern "C++" |
495 | { | |
496 | extern char *rindex (char *__s, int __c) | |
d8387c7b | 497 | __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1)); |
a784e502 | 498 | extern const char *rindex (const char *__s, int __c) |
d8387c7b | 499 | __THROW __asm ("rindex") __attribute_pure__ __nonnull ((1)); |
8585cb74 UD |
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 | ||
a784e502 UD |
508 | __extern_always_inline const char * |
509 | rindex (const char *__s, int __c) __THROW | |
8585cb74 UD |
510 | { |
511 | return __builtin_rindex (__s, __c); | |
512 | } | |
513 | #endif | |
514 | } | |
d8387c7b | 515 | # else |
a784e502 | 516 | extern char *rindex (const char *__s, int __c) |
be27d08c | 517 | __THROW __attribute_pure__ __nonnull ((1)); |
d8387c7b | 518 | # endif |
2c6fe0bd | 519 | |
28f540f4 RM |
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. */ | |
976da847 | 522 | extern int ffs (int __i) __THROW __attribute__ ((__const__)); |
bdd421cc UD |
523 | |
524 | /* The following two functions are non-standard but necessary for non-32 bit | |
525 | platforms. */ | |
526 | # ifdef __USE_GNU | |
976da847 | 527 | extern int ffsl (long int __l) __THROW __attribute__ ((__const__)); |
c1422e5b | 528 | __extension__ extern int ffsll (long long int __ll) |
976da847 | 529 | __THROW __attribute__ ((__const__)); |
bdd421cc | 530 | # endif |
28f540f4 RM |
531 | |
532 | /* Compare S1 and S2, ignoring case. */ | |
a784e502 | 533 | extern int strcasecmp (const char *__s1, const char *__s2) |
be27d08c | 534 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 | 535 | |
6e86a7c2 | 536 | /* Compare no more than N chars of S1 and S2, ignoring case. */ |
a784e502 | 537 | extern int strncasecmp (const char *__s1, const char *__s2, size_t __n) |
be27d08c | 538 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
acd7f096 | 539 | #endif /* Use misc. */ |
6e86a7c2 | 540 | |
0501d603 UD |
541 | #ifdef __USE_GNU |
542 | /* Again versions of a few functions which use the given locale instead | |
543 | of the global one. */ | |
a784e502 | 544 | extern int strcasecmp_l (const char *__s1, const char *__s2, |
be27d08c UD |
545 | __locale_t __loc) |
546 | __THROW __attribute_pure__ __nonnull ((1, 2, 3)); | |
0501d603 | 547 | |
a784e502 | 548 | extern int strncasecmp_l (const char *__s1, const char *__s2, |
1ab62b32 | 549 | size_t __n, __locale_t __loc) |
be27d08c | 550 | __THROW __attribute_pure__ __nonnull ((1, 2, 4)); |
0501d603 UD |
551 | #endif |
552 | ||
498afc54 | 553 | #ifdef __USE_MISC |
28f540f4 RM |
554 | /* Return the next DELIM-delimited token from *STRINGP, |
555 | terminating it with a '\0', and update *STRINGP to point past it. */ | |
c1422e5b | 556 | extern char *strsep (char **__restrict __stringp, |
a784e502 | 557 | const char *__restrict __delim) |
be27d08c | 558 | __THROW __nonnull ((1, 2)); |
28f540f4 RM |
559 | #endif |
560 | ||
6cbe890a | 561 | #ifdef __USE_XOPEN2K8 |
28f540f4 | 562 | /* Return a string describing the meaning of the signal number in SIG. */ |
c1422e5b | 563 | extern char *strsignal (int __sig) __THROW; |
28f540f4 RM |
564 | |
565 | /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */ | |
a784e502 | 566 | extern char *__stpcpy (char *__restrict __dest, const char *__restrict __src) |
be27d08c | 567 | __THROW __nonnull ((1, 2)); |
a784e502 | 568 | extern char *stpcpy (char *__restrict __dest, const char *__restrict __src) |
be27d08c | 569 | __THROW __nonnull ((1, 2)); |
28f540f4 RM |
570 | |
571 | /* Copy no more than N characters of SRC to DEST, returning the address of | |
572 | the last character written into DEST. */ | |
c1422e5b | 573 | extern char *__stpncpy (char *__restrict __dest, |
a784e502 | 574 | const char *__restrict __src, size_t __n) |
be27d08c | 575 | __THROW __nonnull ((1, 2)); |
c1422e5b | 576 | extern char *stpncpy (char *__restrict __dest, |
a784e502 | 577 | const char *__restrict __src, size_t __n) |
be27d08c | 578 | __THROW __nonnull ((1, 2)); |
6cbe890a UD |
579 | #endif |
580 | ||
581 | #ifdef __USE_GNU | |
582 | /* Compare S1 and S2 as strings holding name & indices/version numbers. */ | |
a784e502 | 583 | extern int strverscmp (const char *__s1, const char *__s2) |
6cbe890a | 584 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
28f540f4 | 585 | |
28f540f4 | 586 | /* Sautee STRING briskly. */ |
be27d08c | 587 | extern char *strfry (char *__string) __THROW __nonnull ((1)); |
28f540f4 RM |
588 | |
589 | /* Frobnicate N bytes of S. */ | |
be27d08c | 590 | extern void *memfrob (void *__s, size_t __n) __THROW __nonnull ((1)); |
28f540f4 | 591 | |
92f1da4d | 592 | # ifndef basename |
dd33e89f UD |
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. */ | |
d8387c7b UD |
597 | # ifdef __CORRECT_ISO_CPP_STRING_H_PROTO |
598 | extern "C++" char *basename (char *__filename) | |
599 | __THROW __asm ("basename") __nonnull ((1)); | |
a784e502 | 600 | extern "C++" const char *basename (const char *__filename) |
d8387c7b UD |
601 | __THROW __asm ("basename") __nonnull ((1)); |
602 | # else | |
a784e502 | 603 | extern char *basename (const char *__filename) __THROW __nonnull ((1)); |
d8387c7b | 604 | # endif |
92f1da4d | 605 | # endif |
84724245 RM |
606 | #endif |
607 | ||
55c14926 | 608 | |
847a35a0 | 609 | #if defined __GNUC__ && __GNUC__ >= 2 |
07c416ed AJ |
610 | # if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ \ |
611 | && !defined __NO_INLINE__ && !defined __cplusplus | |
9a0a462c UD |
612 | /* When using GNU CC we provide some optimized versions of selected |
613 | functions from this header. There are two kinds of optimizations: | |
614 | ||
61952351 UD |
615 | - machine-dependent optimizations, most probably using inline |
616 | assembler code; these might be quite expensive since the code | |
617 | size can increase significantly. | |
9a0a462c UD |
618 | These optimizations are not used unless the symbol |
619 | __USE_STRING_INLINES | |
61952351 | 620 | is defined before including this header. |
9a0a462c UD |
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 | |
61952351 | 626 | taught to optimize. |
9a0a462c | 627 | |
61eb22d3 UD |
628 | One can inhibit all optimizations by defining __NO_STRING_INLINES. */ |
629 | ||
630 | /* Get the machine-dependent optimizations (if any). */ | |
847a35a0 | 631 | # include <bits/string.h> |
9a0a462c UD |
632 | |
633 | /* These are generic optimizations which do not add too much inline code. */ | |
847a35a0 UD |
634 | # include <bits/string2.h> |
635 | # endif | |
b5cc329c | 636 | |
5ac3ea17 | 637 | # if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function |
b5cc329c UD |
638 | /* Functions with security checks. */ |
639 | # include <bits/string3.h> | |
640 | # endif | |
92f1da4d UD |
641 | #endif |
642 | ||
28f540f4 RM |
643 | __END_DECLS |
644 | ||
645 | #endif /* string.h */ |