1 /* Copyright (C) 1991-1993, 1995-2002, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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
20 * ISO C99 Standard: 7.21 String handling <string.h>
30 /* Get size_t and NULL from <stddef.h>. */
37 /* Copy N bytes of SRC to DEST. */
38 extern void *memcpy (void *__restrict __dest,
39 __const void *__restrict __src, size_t __n) __THROW;
40 /* Copy N bytes of SRC to DEST, guaranteeing
41 correct behavior for overlapping strings. */
42 extern void *memmove (void *__dest, __const void *__src, size_t __n)
46 /* Copy no more than N bytes of SRC to DEST, stopping when C is found.
47 Return the position in DEST one byte past where C was copied,
48 or NULL if C was not found in the first N bytes of SRC. */
49 #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN
50 extern void *memccpy (void *__restrict __dest, __const void *__restrict __src,
57 /* Set N bytes of S to C. */
58 extern void *memset (void *__s, int __c, size_t __n) __THROW;
60 /* Compare N bytes of S1 and S2. */
61 extern int memcmp (__const void *__s1, __const void *__s2, size_t __n)
62 __THROW __attribute_pure__;
64 /* Search N bytes of S for C. */
65 extern void *memchr (__const void *__s, int __c, size_t __n)
66 __THROW __attribute_pure__;
70 /* Search in S for C. This is similar to `memchr' but there is no
72 extern void *rawmemchr (__const void *__s, int __c) __THROW __attribute_pure__;
74 /* Search N bytes of S for the final occurrence of C. */
75 extern void *memrchr (__const void *__s, int __c, size_t __n)
76 __THROW __attribute_pure__;
81 /* Copy SRC to DEST. */
82 extern char *strcpy (char *__restrict __dest, __const char *__restrict __src)
84 /* Copy no more than N characters of SRC to DEST. */
85 extern char *strncpy (char *__restrict __dest,
86 __const char *__restrict __src, size_t __n) __THROW;
88 /* Append SRC onto DEST. */
89 extern char *strcat (char *__restrict __dest, __const char *__restrict __src)
91 /* Append no more than N characters from SRC onto DEST. */
92 extern char *strncat (char *__restrict __dest, __const char *__restrict __src,
95 /* Compare S1 and S2. */
96 extern int strcmp (__const char *__s1, __const char *__s2)
97 __THROW __attribute_pure__;
98 /* Compare N characters of S1 and S2. */
99 extern int strncmp (__const char *__s1, __const char *__s2, size_t __n)
100 __THROW __attribute_pure__;
102 /* Compare the collated forms of S1 and S2. */
103 extern int strcoll (__const char *__s1, __const char *__s2)
104 __THROW __attribute_pure__;
105 /* Put a transformation of SRC into no more than N bytes of DEST. */
106 extern size_t strxfrm (char *__restrict __dest,
107 __const char *__restrict __src, size_t __n) __THROW;
110 #ifdef __UCLIBC_HAS_XLOCALE__
112 /* The following functions are equivalent to the both above but they
113 take the locale they use for the collation as an extra argument.
114 This is not standardsized but something like will come. */
115 # include <xlocale.h>
117 /* Compare the collated forms of S1 and S2 using rules from L. */
118 extern int strcoll_l (__const char *__s1, __const char *__s2, __locale_t __l)
119 __THROW __attribute_pure__;
120 extern int __strcoll_l (__const char *__s1, __const char *__s2, __locale_t __l)
121 __THROW __attribute_pure__;
123 /* Put a transformation of SRC into no more than N bytes of DEST. */
124 extern size_t strxfrm_l (char *__dest, __const char *__src, size_t __n,
125 __locale_t __l) __THROW;
126 extern size_t __strxfrm_l (char *__dest, __const char *__src, size_t __n,
127 __locale_t __l) __THROW;
132 #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
133 /* Duplicate S, returning an identical malloc'd string. */
134 extern char *strdup (__const char *__s) __THROW __attribute_malloc__;
137 /* Return a malloc'd copy of at most N bytes of STRING. The
138 resultant string is terminated even if no null terminator
139 appears before STRING[N]. */
140 #if defined __USE_GNU
141 extern char *strndup (__const char *__string, size_t __n)
142 __THROW __attribute_malloc__;
145 #if defined __USE_GNU && defined __GNUC__
146 /* Duplicate S, returning an identical alloca'd string. */
147 # define strdupa(s) \
150 __const char *__old = (s); \
151 size_t __len = strlen (__old) + 1; \
152 char *__new = (char *) __builtin_alloca (__len); \
153 (char *) memcpy (__new, __old, __len); \
156 /* Return an alloca'd copy of at most N bytes of string. */
157 # define strndupa(s, n) \
160 __const char *__old = (s); \
161 size_t __len = strnlen (__old, (n)); \
162 char *__new = (char *) __builtin_alloca (__len + 1); \
163 __new[__len] = '\0'; \
164 (char *) memcpy (__new, __old, __len); \
168 __BEGIN_NAMESPACE_STD
169 /* Find the first occurrence of C in S. */
170 extern char *strchr (__const char *__s, int __c) __THROW __attribute_pure__;
171 /* Find the last occurrence of C in S. */
172 extern char *strrchr (__const char *__s, int __c) __THROW __attribute_pure__;
176 /* This function is similar to `strchr'. But it returns a pointer to
177 the closing NUL byte in case C is not found in S. */
178 extern char *strchrnul (__const char *__s, int __c) __THROW __attribute_pure__;
181 __BEGIN_NAMESPACE_STD
182 /* Return the length of the initial segment of S which
183 consists entirely of characters not in REJECT. */
184 extern size_t strcspn (__const char *__s, __const char *__reject)
185 __THROW __attribute_pure__;
186 /* Return the length of the initial segment of S which
187 consists entirely of characters in ACCEPT. */
188 extern size_t strspn (__const char *__s, __const char *__accept)
189 __THROW __attribute_pure__;
190 /* Find the first occurrence in S of any character in ACCEPT. */
191 extern char *strpbrk (__const char *__s, __const char *__accept)
192 __THROW __attribute_pure__;
193 /* Find the first occurrence of NEEDLE in HAYSTACK. */
194 extern char *strstr (__const char *__haystack, __const char *__needle)
195 __THROW __attribute_pure__;
198 /* Divide S into tokens separated by characters in DELIM. */
199 extern char *strtok (char *__restrict __s, __const char *__restrict __delim)
203 /* Divide S into tokens separated by characters in DELIM. Information
204 passed between calls are stored in SAVE_PTR. */
205 extern char *__strtok_r (char *__restrict __s,
206 __const char *__restrict __delim,
207 char **__restrict __save_ptr) __THROW;
208 #if defined __USE_POSIX || defined __USE_MISC
209 extern char *strtok_r (char *__restrict __s, __const char *__restrict __delim,
210 char **__restrict __save_ptr) __THROW;
214 /* Similar to `strstr' but this function ignores the case of both strings. */
215 extern char *strcasestr (__const char *__haystack, __const char *__needle)
216 __THROW __attribute_pure__;
220 /* Find the first occurrence of NEEDLE in HAYSTACK.
221 NEEDLE is NEEDLELEN bytes long;
222 HAYSTACK is HAYSTACKLEN bytes long. */
223 extern void *memmem (__const void *__haystack, size_t __haystacklen,
224 __const void *__needle, size_t __needlelen)
225 __THROW __attribute_pure__;
227 /* Copy N bytes of SRC to DEST, return pointer to bytes after the
228 last written byte. */
229 extern void *__mempcpy (void *__restrict __dest,
230 __const void *__restrict __src, size_t __n) __THROW;
231 extern void *mempcpy (void *__restrict __dest,
232 __const void *__restrict __src, size_t __n) __THROW;
236 __BEGIN_NAMESPACE_STD
237 /* Return the length of S. */
238 extern size_t strlen (__const char *__s) __THROW __attribute_pure__;
242 /* Find the length of STRING, but scan at most MAXLEN characters.
243 If no '\0' terminator is found in that many characters, return MAXLEN. */
244 extern size_t strnlen (__const char *__string, size_t __maxlen)
245 __THROW __attribute_pure__;
249 __BEGIN_NAMESPACE_STD
250 /* Return a string describing the meaning of the `errno' code in ERRNUM. */
251 extern char *strerror (int __errnum) __THROW;
253 #if defined __USE_XOPEN2K || defined __USE_MISC
254 /* Reentrant version of `strerror'. If a temporary buffer is required, at
255 most BUFLEN bytes of BUF will be used. */
256 /* extern char *strerror_r (int __errnum, char *__buf, size_t __buflen) __THROW; */
258 /* uClibc Note: glibc's strerror_r is different from that specified in SUSv3.
259 * So we try to compensate based on feature macros. */
260 extern char *_glibc_strerror_r (int __errnum, char *__buf, size_t __buflen) __THROW;
261 extern int _susv3_strerror_r (int __errnum, char *__buf, size_t buflen) __THROW;
263 #if defined(__USE_XOPEN2K) && !defined(__USE_GNU)
265 extern int __REDIRECT (strerror_r,
266 (int __errnum, char *__buf, size_t buflen) __THROW,
269 # define strerror_r _susv3_strerror_r
271 #else /* defined(__USE_XOPEN2K) && !defined(__USE_GNU) */
273 extern char *__REDIRECT (strerror_r,
274 (int __errnum, char *__buf, size_t buflen) __THROW,
277 # define strerror_r _glibc_strerror_r
279 #endif /* defined(__USE_XOPEN2K) && !defined(__USE_GNU) */
282 /* We define this function always since `bzero' is sometimes needed when
283 the namespace rules does not allow this. */
284 extern void __bzero (void *__s, size_t __n) __THROW;
287 /* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
288 extern void bcopy (__const void *__src, void *__dest, size_t __n) __THROW;
290 /* Set N bytes of S to 0. */
291 extern void bzero (void *__s, size_t __n) __THROW;
293 /* Compare N bytes of S1 and S2 (same as memcmp). */
294 extern int bcmp (__const void *__s1, __const void *__s2, size_t __n)
295 __THROW __attribute_pure__;
297 /* Find the first occurrence of C in S (same as strchr). */
298 extern char *index (__const char *__s, int __c) __THROW __attribute_pure__;
300 /* Find the last occurrence of C in S (same as strrchr). */
301 extern char *rindex (__const char *__s, int __c) __THROW __attribute_pure__;
303 /* Return the position of the first bit set in I, or 0 if none are set.
304 The least-significant bit is position 1, the most-significant 32. */
305 extern int ffs (int __i) __THROW __attribute__ ((__const__));
307 /* The following two functions are non-standard but necessary for non-32 bit
310 extern int ffsl (long int __l) __THROW __attribute__ ((__const__));
312 __extension__ extern int ffsll (long long int __ll)
313 __THROW __attribute__ ((__const__));
317 /* Compare S1 and S2, ignoring case. */
318 extern int strcasecmp (__const char *__s1, __const char *__s2)
319 __THROW __attribute_pure__;
321 /* Compare no more than N chars of S1 and S2, ignoring case. */
322 extern int strncasecmp (__const char *__s1, __const char *__s2, size_t __n)
323 __THROW __attribute_pure__;
324 #endif /* Use BSD. */
326 #ifdef __UCLIBC_HAS_XLOCALE__
328 /* Again versions of a few functions which use the given locale instead
329 of the global one. */
330 extern int strcasecmp_l (__const char *__s1, __const char *__s2,
331 __locale_t __loc) __THROW __attribute_pure__;
332 extern int __strcasecmp_l (__const char *__s1, __const char *__s2,
333 __locale_t __loc) __THROW __attribute_pure__;
335 extern int strncasecmp_l (__const char *__s1, __const char *__s2,
336 size_t __n, __locale_t __loc)
337 __THROW __attribute_pure__;
338 extern int __strncasecmp_l (__const char *__s1, __const char *__s2,
339 size_t __n, __locale_t __loc)
340 __THROW __attribute_pure__;
345 /* Return the next DELIM-delimited token from *STRINGP,
346 terminating it with a '\0', and update *STRINGP to point past it. */
347 extern char *strsep (char **__restrict __stringp,
348 __const char *__restrict __delim) __THROW;
353 /* Return a string describing the meaning of the signal number in SIG. */
354 extern char *strsignal (int __sig) __THROW;
356 /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
357 extern char *__stpcpy (char *__restrict __dest, __const char *__restrict __src)
359 extern char *stpcpy (char *__restrict __dest, __const char *__restrict __src)
362 /* Copy no more than N characters of SRC to DEST, returning the address of
363 the last character written into DEST. */
364 extern char *__stpncpy (char *__restrict __dest,
365 __const char *__restrict __src, size_t __n) __THROW;
366 extern char *stpncpy (char *__restrict __dest,
367 __const char *__restrict __src, size_t __n) __THROW;
370 /* Return the file name within directory of FILENAME. We don't
371 declare the function if the `basename' macro is available (defined
372 in <libgen.h>) which makes the XPG version of this function
374 extern char *basename (__const char *__filename) __THROW;
380 /* Two OpenBSD extension functions. */
381 extern size_t strlcat(char *__restrict dst, const char *__restrict src,
383 extern size_t strlcpy(char *__restrict dst, const char *__restrict src,
389 #endif /* string.h */