1 /* A GNU-like <string.h>.
3 Copyright (C) 1995-1996, 2001-2007 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
22 #include @ABSOLUTE_STRING_H@
28 /* Return the first occurrence of NEEDLE in HAYSTACK. */
30 # if ! @HAVE_DECL_MEMMEM@
31 extern void *memmem (void const *__haystack, size_t __haystack_len,
32 void const *__needle, size_t __needle_len);
36 # define memmem memmem_is_unportable__use_gnulib_module_memmem_for_portability
39 /* Copy N bytes of SRC to DEST, return pointer to bytes after the
43 extern void *mempcpy (void *restrict __dest, void const *restrict __src,
48 # define mempcpy mempcpy_is_unportable__use_gnulib_module_mempcpy_for_portability
51 /* Search backwards through a block for a byte (specified as an int). */
53 # if ! @HAVE_DECL_MEMRCHR@
54 extern void *memrchr (void const *, int, size_t);
58 # define memrchr memrchr_is_unportable__use_gnulib_module_memrchr_for_portability
61 /* Copy SRC to DST, returning the address of the terminating '\0' in DST. */
64 extern char *stpcpy (char *restrict __dst, char const *restrict __src);
68 # define stpcpy stpcpy_is_unportable__use_gnulib_module_stpcpy_for_portability
71 /* Copy no more than N bytes of SRC to DST, returning a pointer past the
72 last non-NUL byte written into DST. */
75 # define stpncpy gnu_stpncpy
76 extern char *stpncpy (char *restrict __dst, char const *restrict __src,
81 # define stpncpy stpncpy_is_unportable__use_gnulib_module_stpncpy_for_portability
84 /* Compare strings S1 and S2, ignoring case, returning less than, equal to or
85 greater than zero if S1 is lexicographically less than, equal to or greater
87 Note: This function may, in multibyte locales, return 0 for strings of
89 No known system has a strcasecmp() function that works correctly in
90 multibyte locales. Therefore use our version always, if the
91 strcase module is available. */
93 # if @REPLACE_STRCASECMP@
94 # define strcasecmp rpl_strcasecmp
95 extern int strcasecmp (char const *__s1, char const *__s2);
99 # define strcasecmp strcasecmp_is_unportable__use_gnulib_module_strcase_for_portability
102 /* Compare no more than N bytes of strings S1 and S2, ignoring case,
103 returning less than, equal to or greater than zero if S1 is
104 lexicographically less than, equal to or greater than S2.
105 Note: This function cannot work correctly in multibyte locales. */
107 # if ! @HAVE_DECL_STRNCASECMP@
108 extern int strncasecmp (char const *__s1, char const *__s2, size_t __n);
112 # define strncasecmp strncasecmp_is_unportable__use_gnulib_module_strcase_for_portability
115 /* Find the first occurrence of C in S or the final NUL byte. */
116 #if @GNULIB_STRCHRNUL@
117 # if ! @HAVE_STRCHRNUL@
118 extern char *strchrnul (char const *__s, int __c_in);
122 # define strchrnul strchrnul_is_unportable__use_gnulib_module_strchrnul_for_portability
125 /* Duplicate S, returning an identical malloc'd string. */
127 # if ! @HAVE_DECL_STRDUP@ && ! defined strdup
128 extern char *strdup (char const *__s);
132 # define strdup strdup_is_unportable__use_gnulib_module_strdup_for_portability
135 /* Return a newly allocated copy of at most N bytes of STRING. */
137 # if ! @HAVE_STRNDUP@
139 # define strndup rpl_strndup
140 # if ! @HAVE_DECL_STRNDUP@
141 extern char *strndup (char const *__string, size_t __n);
146 # define strndup strndup_is_unportable__use_gnulib_module_strndup_for_portability
149 /* Find the length (number of bytes) of STRING, but scan at most
150 MAXLEN bytes. If no '\0' terminator is found in that many bytes,
153 # if ! @HAVE_DECL_STRNLEN@
154 extern size_t strnlen (char const *__string, size_t __maxlen);
158 # define strnlen strnlen_is_unportable__use_gnulib_module_strnlen_for_portability
161 /* Find the first occurrence in S of any character in ACCEPT. */
163 # if ! @HAVE_STRPBRK@
164 extern char *strpbrk (char const *__s, char const *__accept);
168 # define strpbrk strpbrk_is_unportable__use_gnulib_module_strpbrk_for_portability
171 /* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
172 If one is found, overwrite it with a NUL, and advance *STRINGP
173 to point to the next char after it. Otherwise, set *STRINGP to NULL.
174 If *STRINGP was already NULL, nothing happens.
175 Return the old value of *STRINGP.
177 This is a variant of strtok() that is multithread-safe and supports
180 Caveat: It modifies the original string.
181 Caveat: These functions cannot be used on constant strings.
182 Caveat: The identity of the delimiting character is lost.
183 Caveat: It doesn't work with multibyte strings unless all of the delimiter
184 characters are ASCII characters < 0x30.
186 See also strtok_r(). */
189 extern char *strsep (char **restrict __stringp, char const *restrict __delim);
193 # define strsep strsep_is_unportable__use_gnulib_module_strsep_for_portability
196 /* Find the first occurrence of NEEDLE in HAYSTACK.
197 No known system has a strstr() function that works correctly in
198 multibyte locales. Therefore use our version always, if the strstr
199 module is available. */
201 # if @REPLACE_STRSTR@
203 # define strstr rpl_strstr
204 extern char *strstr (char const *__haystack, char const *__needle);
208 # define strstr strstr_is_unportable__use_gnulib_module_strstr_for_portability
211 /* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
213 Note: This function may, in multibyte locales, return success even if
214 strlen (haystack) < strlen (needle) ! */
215 #if @GNULIB_STRCASESTR@
216 # if @REPLACE_STRCASESTR@
218 # define strcasestr rpl_strcasestr
219 extern char *strcasestr (const char *haystack, const char *needle);
223 # define strcasestr strcasestr_is_unportable__use_gnulib_module_strcasestr_for_portability
226 /* Parse S into tokens separated by characters in DELIM.
227 If S is NULL, the saved pointer in SAVE_PTR is used as
228 the next starting point. For example:
229 char s[] = "-abc-=-def";
231 x = strtok_r(s, "-", &sp); // x = "abc", sp = "=-def"
232 x = strtok_r(NULL, "-=", &sp); // x = "def", sp = NULL
233 x = strtok_r(NULL, "=", &sp); // x = NULL
236 This is a variant of strtok() that is multithread-safe.
238 For the POSIX documentation for this function, see:
239 http://www.opengroup.org/susv3xsh/strtok.html
241 Caveat: It modifies the original string.
242 Caveat: These functions cannot be used on constant strings.
243 Caveat: The identity of the delimiting character is lost.
244 Caveat: It doesn't work with multibyte strings unless all of the delimiter
245 characters are ASCII characters < 0x30.
247 See also strsep(). */
248 #if @GNULIB_STRTOK_R@
249 # if ! @HAVE_DECL_STRTOK_R@
250 extern char *strtok_r (char *restrict __s, char const *restrict __sep,
251 char **restrict __lasts);
255 # define strtok_r strtok_r_is_unportable__use_gnulib_module_strtok_r_for_portability