1 /* Copyright (C) 1991, 92, 93, 95, 96, 97 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 Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 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 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
20 * ISO C Standard: 4.11 STRING HANDLING <string.h>
30 /* Get size_t and NULL from <stddef.h>. */
36 /* Copy N bytes of SRC to DEST. */
37 extern __ptr_t memcpy __P ((__ptr_t __restrict __dest,
38 __const __ptr_t __restrict __src, size_t __n));
39 /* Copy N bytes of SRC to DEST, guaranteeing
40 correct behavior for overlapping strings. */
41 extern __ptr_t memmove __P ((__ptr_t __dest, __const __ptr_t __src,
44 /* Copy no more than N bytes of SRC to DEST, stopping when C is found.
45 Return the position in DEST one byte past where C was copied,
46 or NULL if C was not found in the first N bytes of SRC. */
47 extern __ptr_t __memccpy __P ((__ptr_t __dest, __const __ptr_t __src,
48 int __c, size_t __n));
49 #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN
50 extern __ptr_t memccpy __P ((__ptr_t __dest, __const __ptr_t __src,
51 int __c, size_t __n));
55 /* Set N bytes of S to C. */
56 extern __ptr_t memset __P ((__ptr_t __s, int __c, size_t __n));
58 /* Compare N bytes of S1 and S2. */
59 extern int memcmp __P ((__const __ptr_t __s1, __const __ptr_t __s2,
62 /* Search N bytes of S for C. */
63 extern __ptr_t memchr __P ((__const __ptr_t __s, int __c, size_t __n));
66 /* Copy SRC to DEST. */
67 extern char *strcpy __P ((char *__restrict __dest,
68 __const char *__restrict __src));
69 /* Copy no more than N characters of SRC to DEST. */
70 extern char *strncpy __P ((char *__restrict __dest,
71 __const char *__restrict __src, size_t __n));
73 /* Append SRC onto DEST. */
74 extern char *strcat __P ((char *__restrict __dest,
75 __const char *__restrict __src));
76 /* Append no more than N characters from SRC onto DEST. */
77 extern char *strncat __P ((char *__restrict __dest,
78 __const char *__restrict __src, size_t __n));
80 /* Compare S1 and S2. */
81 extern int strcmp __P ((__const char *__s1, __const char *__s2));
82 /* Compare N characters of S1 and S2. */
83 extern int strncmp __P ((__const char *__s1, __const char *__s2, size_t __n));
85 /* Compare the collated forms of S1 and S2. */
86 extern int strcoll __P ((__const char *__s1, __const char *__s2));
87 /* Put a transformation of SRC into no more than N bytes of DEST. */
88 extern size_t strxfrm __P ((char *__restrict __dest,
89 __const char *__restrict __src, size_t __n));
92 /* The following functions are equivalent to the both above but they
93 take the locale they use for the collation as an extra argument.
94 This is not standardsized but something like will come. */
97 /* Compare the collated forms of S1 and S2 using rules from L. */
98 extern int __strcoll_l __P ((__const char *__s1, __const char *__s2,
100 /* Put a transformation of SRC into no more than N bytes of DEST. */
101 extern size_t __strxfrm_l __P ((char *__dest, __const char *__src, size_t __n,
105 #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
106 /* Duplicate S, returning an identical malloc'd string. */
107 extern char *__strdup __P ((__const char *__s));
108 extern char *strdup __P ((__const char *__s));
111 /* Return a malloc'd copy of at most N bytes of STRING. The
112 resultant string is terminated even if no null terminator
113 appears before STRING[N]. */
114 extern char *__strndup __P ((__const char *__string, size_t __n));
115 #if defined __USE_GNU
116 extern char *strndup __P ((__const char *__string, size_t __n));
119 #if defined __USE_GNU && defined __GNUC__
120 /* Duplicate S, returning an identical alloca'd string. */
124 __const char *__old = (s); \
125 size_t __len = strlen (__old) + 1; \
126 char *__new = __builtin_alloca (__len); \
127 memcpy (__new, __old, __len); \
130 /* Return an alloca'd copy of at most N bytes of string. */
131 #define strndupa(s, n) \
134 __const char *__old = (s); \
135 size_t __len = strnlen (__old, (n)); \
136 char *__new = __builtin_alloca (__len + 1); \
137 __new[__len] = '\0'; \
138 memcpy (__new, __old, __len); \
142 /* Find the first occurrence of C in S. */
143 extern char *strchr __P ((__const char *__s, int __c));
144 /* Find the last occurrence of C in S. */
145 extern char *strrchr __P ((__const char *__s, int __c));
147 /* Return the length of the initial segment of S which
148 consists entirely of characters not in REJECT. */
149 extern size_t strcspn __P ((__const char *__s, __const char *__reject));
150 /* Return the length of the initial segment of S which
151 consists entirely of characters in ACCEPT. */
152 extern size_t strspn __P ((__const char *__s, __const char *__accept));
153 /* Find the first occurrence in S of any character in ACCEPT. */
154 extern char *strpbrk __P ((__const char *__s, __const char *__accept));
155 /* Find the first occurrence of NEEDLE in HAYSTACK. */
156 extern char *strstr __P ((__const char *__haystack, __const char *__needle));
157 /* Divide S into tokens separated by characters in DELIM. */
158 extern char *strtok __P ((char *__restrict __s,
159 __const char *__restrict __delim));
161 #if defined __USE_POSIX || defined __USE_MISC
162 /* Divide S into tokens separated by characters in DELIM. Information
163 passed between calls are stored in SAVE_PTR. */
164 extern char *strtok_r __P ((char *__s, __const char *__delim,
169 /* Find the first occurrence of NEEDLE in HAYSTACK.
170 NEEDLE is NEEDLELEN bytes long;
171 HAYSTACK is HAYSTACKLEN bytes long. */
172 extern __ptr_t memmem __P ((__const __ptr_t __haystack, size_t __haystacklen,
173 __const __ptr_t __needle, size_t __needlelen));
177 /* Return the length of S. */
178 extern size_t strlen __P ((__const char *__s));
181 /* Find the length of STRING, but scan at most MAXLEN characters.
182 If no '\0' terminator is found in that many characters, return MAXLEN. */
183 extern size_t strnlen __P ((__const char *__string, size_t __maxlen));
186 extern __inline size_t
187 strnlen (__const char *__string, size_t __maxlen)
189 __const char *__end = (__const char *) memchr (__string, '\0', __maxlen);
190 return __end ? __end - __string : __maxlen;
196 /* Return a string describing the meaning of the `errno' code in ERRNUM. */
197 extern char *strerror __P ((int __errnum));
199 /* Reentrant version of `strerror'. If a temporary buffer is required, at
200 most BUFLEN bytes of BUF will be used. */
201 extern char *__strerror_r __P ((int __errnum, char *__buf, size_t __buflen));
202 extern char *strerror_r __P ((int __errnum, char *__buf, size_t __buflen));
205 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
206 /* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
207 extern void bcopy __P ((__const __ptr_t __src, __ptr_t __dest, size_t __n));
209 /* Set N bytes of S to 0. */
210 extern void bzero __P ((__ptr_t __s, size_t __n));
212 /* Compare N bytes of S1 and S2 (same as memcmp). */
213 extern int bcmp __P ((__const __ptr_t __s1, __const __ptr_t __s2, size_t __n));
215 /* Find the first occurrence of C in S (same as strchr). */
216 extern char *index __P ((__const char *__s, int __c));
218 /* Find the last occurrence of C in S (same as strrchr). */
219 extern char *rindex __P ((__const char *__s, int __c));
221 /* Return the position of the first bit set in I, or 0 if none are set.
222 The least-significant bit is position 1, the most-significant 32. */
223 extern int ffs __P ((int __i));
225 /* Compare S1 and S2, ignoring case. */
226 extern int __strcasecmp __P ((__const char *__s1, __const char *__s2));
227 extern int strcasecmp __P ((__const char *__s1, __const char *__s2));
229 /* Compare no more than N chars of S1 and S2, ignoring case. */
230 extern int __strncasecmp __P ((__const char *__s1, __const char *__s2,
232 extern int strncasecmp __P ((__const char *__s1, __const char *__s2,
234 #endif /* Use BSD or X/Open Unix. */
237 /* Return the next DELIM-delimited token from *STRINGP,
238 terminating it with a '\0', and update *STRINGP to point past it. */
239 extern char *__strsep __P ((char **__stringp, __const char *__delim));
240 extern char *strsep __P ((char **__stringp, __const char *__delim));
244 /* Compare S1 and S2 as strings holding name & indices/version numbers. */
245 extern int strverscmp __P ((__const char *__s1, __const char *__s2));
247 /* Return a string describing the meaning of the signal number in SIG. */
248 extern char *strsignal __P ((int __sig));
250 /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
251 extern char *__stpcpy __P ((char *__dest, __const char *__src));
252 extern char *stpcpy __P ((char *__dest, __const char *__src));
254 /* Copy no more than N characters of SRC to DEST, returning the address of
255 the last character written into DEST. */
256 extern char *__stpncpy __P ((char *__dest, __const char *__src, size_t __n));
257 extern char *stpncpy __P ((char *__dest, __const char *__src, size_t __n));
259 /* Sautee STRING briskly. */
260 extern char *strfry __P ((char *__string));
262 /* Frobnicate N bytes of S. */
263 extern __ptr_t memfrob __P ((__ptr_t __s, size_t __n));
266 #if defined __USE_MISC || !defined basename
267 /* Return the file name within directory of FILENAME. We don't
268 declare the function if the `basename' macro is available (defined
269 in <libgen.h>) which makes the XPG version of this function
271 extern char *basename __P ((__const char *__filename));
276 #endif /* string.h */