1 /* Copyright (C) 1991, 92, 93, 95, 96 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 __dest
, __const __ptr_t __src
,
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 *__dest
, __const
char *__src
));
68 /* Copy no more than N characters of SRC to DEST. */
69 extern char *strncpy
__P ((char *__dest
, __const
char *__src
, size_t __n
));
71 /* Append SRC onto DEST. */
72 extern char *strcat
__P ((char *__dest
, __const
char *__src
));
73 /* Append no more than N characters from SRC onto DEST. */
74 extern char *strncat
__P ((char *__dest
, __const
char *__src
, size_t __n
));
76 /* Compare S1 and S2. */
77 extern int strcmp
__P ((__const
char *__s1
, __const
char *__s2
));
78 /* Compare N characters of S1 and S2. */
79 extern int strncmp
__P ((__const
char *__s1
, __const
char *__s2
, size_t __n
));
81 /* Compare the collated forms of S1 and S2. */
82 extern int strcoll
__P ((__const
char *__s1
, __const
char *__s2
));
83 /* Put a transformation of SRC into no more than N bytes of DEST. */
84 extern size_t strxfrm
__P ((char *__dest
, __const
char *__src
, size_t __n
));
86 #if defined(__USE_SVID) || defined(__USE_BSD) || defined(__USE_XOPEN_EXTENDED)
87 /* Duplicate S, returning an identical malloc'd string. */
88 extern char *__strdup
__P ((__const
char *__s
));
89 extern char *strdup
__P ((__const
char *__s
));
92 /* Return a malloc'd copy of at most N bytes of STRING. The
93 resultant string is terminated even if no null terminator
94 appears before STRING[N]. */
95 extern char *__strndup
__P ((__const
char *__string
, size_t __n
));
96 extern char *strndup
__P ((__const
char *__string
, size_t __n
));
98 #if defined (__USE_GNU) && defined (__GNUC__)
99 /* Duplicate S, returning an identical alloca'd string. */
103 __const char *__old = (s); \
104 size_t __len = strlen (__old) + 1; \
105 char *__new = __builtin_alloca (__len); \
106 memcpy (__new, __old, __len); \
109 /* Return an alloca'd copy of at most N bytes of string. */
110 #define strndupa(s, n) \
113 __const char *__old = (s); \
114 size_t __len = strnlen (__old, (n)); \
115 char *__new = __builtin_alloca (__len + 1); \
116 __new[__len] = '\0'; \
117 memcpy (__new, __old, __len); \
121 /* Find the first occurrence of C in S. */
122 extern char *strchr
__P ((__const
char *__s
, int __c
));
123 /* Find the last occurrence of C in S. */
124 extern char *strrchr
__P ((__const
char *__s
, int __c
));
126 /* Return the length of the initial segment of S which
127 consists entirely of characters not in REJECT. */
128 extern size_t strcspn
__P ((__const
char *__s
, __const
char *__reject
));
129 /* Return the length of the initial segment of S which
130 consists entirely of characters in ACCEPT. */
131 extern size_t strspn
__P ((__const
char *__s
, __const
char *__accept
));
132 /* Find the first occurence in S of any character in ACCEPT. */
133 extern char *strpbrk
__P ((__const
char *__s
, __const
char *__accept
));
134 /* Find the first occurence of NEEDLE in HAYSTACK. */
135 extern char *strstr
__P ((__const
char *__haystack
, __const
char *__needle
));
136 /* Divide S into tokens separated by characters in DELIM. */
137 extern char *strtok
__P ((char *__s
, __const
char *__delim
));
140 /* Divide S into tokens separated by characters in DELIM. Information
141 passed between calls are stored in SAVE_PTR. */
142 extern char *strtok_r
__P ((char *__s
, __const
char *__delim
,
145 /* Find the first occurence of NEEDLE in HAYSTACK.
146 NEEDLE is NEEDLELEN bytes long;
147 HAYSTACK is HAYSTACKLEN bytes long. */
148 extern __ptr_t memmem
__P ((__const __ptr_t __haystack
, size_t __haystacklen
,
149 __const __ptr_t __needle
, size_t __needlelen
));
153 /* Return the length of S. */
154 extern size_t strlen
__P ((__const
char *__s
));
157 /* Find the length of STRING, but scan at most MAXLEN characters.
158 If no '\0' terminator is found in that many characters, return MAXLEN. */
159 extern size_t strnlen
__P ((__const
char *__string
, size_t __maxlen
));
162 extern __inline
size_t
163 strnlen (__const
char *__string
, size_t __maxlen
)
165 __const
char *__end
= memchr (__string
, '\0', __maxlen
);
166 return __end
? __end
- __string
: __maxlen
;
172 /* Return a string describing the meaning of the `errno' code in ERRNUM. */
173 extern char *strerror
__P ((int __errnum
));
174 #ifdef __USE_REENTRANT
175 /* Reentrant version of `strerror'. If a temporary buffer is required, at
176 most BUFLEN bytes of BUF will be used. */
177 extern char *strerror_r
__P ((int __errnum
, char *__buf
, size_t __buflen
));
180 #if defined(__USE_BSD) || defined(__USE_XOPEN_EXTENDED)
181 /* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
182 extern void bcopy
__P ((__const __ptr_t __src
, __ptr_t __dest
, size_t __n
));
184 /* Set N bytes of S to 0. */
185 extern void bzero
__P ((__ptr_t __s
, size_t __n
));
187 /* Compare N bytes of S1 and S2 (same as memcmp). */
188 extern int bcmp
__P ((__const __ptr_t __s1
, __const __ptr_t __s2
, size_t __n
));
190 /* Find the first occurrence of C in S (same as strchr). */
191 extern char *index
__P ((__const
char *__s
, int __c
));
193 /* Find the last occurrence of C in S (same as strrchr). */
194 extern char *rindex
__P ((__const
char *__s
, int __c
));
196 /* Return the position of the first bit set in I, or 0 if none are set.
197 The least-significant bit is position 1, the most-significant 32. */
198 extern int ffs
__P ((int __i
));
200 /* Compare S1 and S2, ignoring case. */
201 extern int __strcasecmp
__P ((__const
char *__s1
, __const
char *__s2
));
202 extern int strcasecmp
__P ((__const
char *__s1
, __const
char *__s2
));
204 /* Compare no more than N chars of S1 and S2, ignoring case. */
205 extern int __strncasecmp
__P ((__const
char *__s1
, __const
char *__s2
,
207 extern int strncasecmp
__P ((__const
char *__s1
, __const
char *__s2
,
209 #endif /* Use BSD or X/Open Unix. */
212 /* Return the next DELIM-delimited token from *STRINGP,
213 terminating it with a '\0', and update *STRINGP to point past it. */
214 extern char *__strsep
__P ((char **__stringp
, __const
char *__delim
));
215 extern char *strsep
__P ((char **__stringp
, __const
char *__delim
));
219 /* Return a string describing the meaning of the signal number in SIG. */
220 extern char *strsignal
__P ((int __sig
));
222 /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
223 extern char *__stpcpy
__P ((char *__dest
, __const
char *__src
));
224 extern char *stpcpy
__P ((char *__dest
, __const
char *__src
));
226 /* Copy no more than N characters of SRC to DEST, returning the address of
227 the last character written into DEST. */
228 extern char *__stpncpy
__P ((char *__dest
, __const
char *__src
, size_t __n
));
229 extern char *stpncpy
__P ((char *__dest
, __const
char *__src
, size_t __n
));
231 /* Sautee STRING briskly. */
232 extern char *strfry
__P ((char *__string
));
234 /* Frobnicate N bytes of S. */
235 extern __ptr_t memfrob
__P ((__ptr_t __s
, size_t __n
));
239 /* Return the file name within directory of FILENAME. */
240 extern char *basename
__P ((__const
char *__filename
));
245 #endif /* string.h */