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
16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17 Cambridge, MA 02139, USA. */
20 * ANSI 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)
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)
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 #if defined (__USE_GNU) && defined (__GNUC__)
93 /* Duplicate S, returning an identical alloca'd string. */
96 __const char *__old = (s); \
97 size_t __len = strlen (__old) + 1; \
98 memcpy (__builtin_alloca (__len), __old, __len); \
101 /* Return a malloc'd copy of at most N bytes of STRING. The
102 resultant string is terminated even if no null terminator
103 appears before STRING[N]. */
104 extern char *strndup __P ((__const char *__string, size_t __n));
106 /* Return an alloca'd copy of at most N bytes of string. */
107 #define strndupa(s, n) \
109 __const char *__old = (s); \
111 size_t __len = strnlen (__old, (n)); \
112 __new = memcpy (__builtin_alloca (__len + 1), __old, __len); \
113 __new[__len] = '\0'; \
118 /* Find the first occurrence of C in S. */
119 extern char *strchr __P ((__const char *__s, int __c));
120 /* Find the last occurrence of C in S. */
121 extern char *strrchr __P ((__const char *__s, int __c));
123 /* Return the length of the initial segment of S which
124 consists entirely of characters not in REJECT. */
125 extern size_t strcspn __P ((__const char *__s, __const char *__reject));
126 /* Return the length of the initial segment of S which
127 consists entirely of characters in ACCEPT. */
128 extern size_t strspn __P ((__const char *__s, __const char *__accept));
129 /* Find the first occurence in S of any character in ACCEPT. */
130 extern char *strpbrk __P ((__const char *__s, __const char *__accept));
131 /* Find the first occurence of NEEDLE in HAYSTACK. */
132 extern char *strstr __P ((__const char *__haystack, __const char *__needle));
133 /* Divide S into tokens separated by characters in DELIM. */
134 extern char *strtok __P ((char *__s, __const char *__delim));
137 /* Divide S into tokens separated by characters in DELIM. Information
138 passed between calls are stored in SAVE_PTR. */
139 extern char *strtok_r __P ((char *__s, __const char *__delim,
142 /* Find the first occurence of NEEDLE in HAYSTACK.
143 NEEDLE is NEEDLELEN bytes long;
144 HAYSTACK is HAYSTACKLEN bytes long. */
145 extern __ptr_t memmem __P ((__const __ptr_t __haystack, size_t __haystacklen,
146 __const __ptr_t __needle, size_t __needlelen));
150 /* Return the length of S. */
151 extern size_t strlen __P ((__const char *__s));
154 /* Find the length of STRING, but scan at most MAXLEN characters.
155 If no '\0' terminator is found in that many characters, return MAXLEN. */
156 extern size_t strnlen __P ((__const char *__string, size_t __maxlen));
159 extern __inline size_t
160 strnlen (__const char *__string, size_t __maxlen)
162 __const char *__end = memchr (__string, '\0', __maxlen);
163 return __end ? __end - __string : __maxlen;
169 /* Return a string describing the meaning of the `errno' code in ERRNUM. */
170 extern char *strerror __P ((int __errnum));
171 #ifdef __USE_REENTRANT
172 /* Reentrant version of `strerror'. If a temporary buffer is required, at
173 most BUFLEN bytes of BUF will be used. */
174 extern char *strerror_r __P ((int __errnum, char *__buf, size_t __buflen));
178 /* Find the first occurrence of C in S (same as strchr). */
179 extern char *index __P ((__const char *__s, int __c));
181 /* Find the last occurrence of C in S (same as strrchr). */
182 extern char *rindex __P ((__const char *__s, int __c));
184 /* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
185 extern void bcopy __P ((__const __ptr_t __src, __ptr_t __dest, size_t __n));
187 /* Set N bytes of S to 0. */
188 extern void bzero __P ((__ptr_t __s, size_t __n));
190 /* Compare N bytes of S1 and S2 (same as memcmp). */
191 extern int bcmp __P ((__const __ptr_t __s1, __const __ptr_t __s2, size_t __n));
193 /* Return the position of the first bit set in I, or 0 if none are set.
194 The least-significant bit is position 1, the most-significant 32. */
195 extern int ffs __P ((int __i));
197 /* Compare S1 and S2, ignoring case. */
198 extern int __strcasecmp __P ((__const char *__s1, __const char *__s2));
199 extern int strcasecmp __P ((__const char *__s1, __const char *__s2));
201 /* Compare no more than N chars of S1 and S2, ignoring case. */
202 extern int __strncasecmp __P ((__const char *__s1, __const char *__s2,
204 extern int strncasecmp __P ((__const char *__s1, __const char *__s2,
207 /* Return the next DELIM-delimited token from *STRINGP,
208 terminating it with a '\0', and update *STRINGP to point past it. */
209 extern char *strsep __P ((char **__stringp, __const char *__delim));
213 /* Return a string describing the meaning of the signal number in SIG. */
214 extern char *strsignal __P ((int __sig));
216 /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
217 extern char *__stpcpy __P ((char *__dest, __const char *__src));
218 extern char *stpcpy __P ((char *__dest, __const char *__src));
220 /* Copy no more than N characters of SRC to DEST, returning the address of
221 the last character written into DEST. */
222 extern char *__stpncpy __P ((char *__dest, __const char *__src, size_t __n));
223 extern char *stpncpy __P ((char *__dest, __const char *__src, size_t __n));
225 /* Sautee STRING briskly. */
226 extern char *strfry __P ((char *__string));
228 /* Frobnicate N bytes of S. */
229 extern __ptr_t memfrob __P ((__ptr_t __s, size_t __n));
233 /* Return the file name within directory of FILENAME. */
234 extern char *basename __P ((__const char *filename));
239 #endif /* string.h */