diff options
author | Christopher Faylor <me@cgf.cx> | 2005-11-09 01:08:39 +0300 |
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committer | Christopher Faylor <me@cgf.cx> | 2005-11-09 01:08:39 +0300 |
commit | 42cd8528aa3dfde2d7bd9d1eee97a3d96d0efcd0 (patch) | |
tree | b07980be75f1403e879556920b74019fd53e47cf /winsup/cygwin/libc | |
parent | 1f99dd3ecf3252517363ec8f0fec4b0a95706f31 (diff) |
* memmem.cc: New file.
* include/cygwin/version.h: Bump API version number to 142.
* cygwin.din: Export memmem.
Diffstat (limited to 'winsup/cygwin/libc')
-rw-r--r-- | winsup/cygwin/libc/memmem.cc | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/winsup/cygwin/libc/memmem.cc b/winsup/cygwin/libc/memmem.cc new file mode 100644 index 000000000..cd9dc33d3 --- /dev/null +++ b/winsup/cygwin/libc/memmem.cc @@ -0,0 +1,67 @@ +/*- + * Copyright (c) 2005 Pascal Gloor <pascal.gloor@spale.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +#if 0 +__FBSDID("$FreeBSD: src/lib/libc/string/memmem.c,v 1.1 2005/08/25 18:26:58 andre Exp $"); +#endif + +#include <string.h> + +/* Find the first occurrence of the byte string s in byte string l. + */ + +extern "C" void * +memmem (const void *l, size_t l_len, + const void *s, size_t s_len) +{ + register char *cur, *last; + const char *cl = (const char *)l; + const char *cs = (const char *)s; + + /* we need something to compare */ + if (l_len == 0 || s_len == 0) + return NULL; + + /* "s" must be smaller or equal to "l" */ + if (l_len < s_len) + return NULL; + + /* special case where s_len == 1 */ + if (s_len == 1) + return memchr (l, (int) *cs, l_len); + + /* the last position where its possible to find "s" in "l" */ + last = (char *) cl + l_len - s_len; + + for (cur = (char *) cl; cur <= last; cur++) + if (cur[0] == cs[0] && memcmp (cur, cs, s_len) == 0) + return cur; + + return NULL; +} |