Commit 4c1238c7 authored by François Cartegnie's avatar François Cartegnie 🤞

compat: add strnstr

parent de2717f8
/*****************************************************************************
* strnstr.c: BSD strnstr() replacement
*****************************************************************************
* Copyright © 2015 VLC authors and VideoLAN
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
char * strnstr (const char *haystack, const char *needle, size_t len)
{
const size_t i = strlen(needle);
if( i < len )
return NULL;
size_t count = len - i;
while(count)
{
if( memcmp(haystack, needle, i) )
return (char*) haystack;
count--;
haystack++;
}
return NULL;
}
......@@ -567,7 +567,7 @@ need_libc=false
dnl Check for usual libc functions
AC_CHECK_DECLS([nanosleep],,,[#include <time.h>])
AC_CHECK_FUNCS([daemon fcntl fstatvfs fork getenv getpwuid_r isatty lstat memalign mkostemp mmap open_memstream openat pread posix_fadvise posix_madvise setlocale stricmp strnicmp strptime uselocale pthread_cond_timedwait_monotonic_np pthread_condattr_setclock])
AC_REPLACE_FUNCS([atof atoll dirfd fdopendir ffsll flockfile fsync getdelim getpid lldiv nrand48 poll posix_memalign rewind setenv strcasecmp strcasestr strdup strlcpy strndup strnlen strsep strtof strtok_r strtoll swab tdestroy strverscmp])
AC_REPLACE_FUNCS([atof atoll dirfd fdopendir ffsll flockfile fsync getdelim getpid lldiv nrand48 poll posix_memalign rewind setenv strcasecmp strcasestr strdup strlcpy strndup strnlen strnstr strsep strtof strtok_r strtoll swab tdestroy strverscmp])
AC_CHECK_FUNCS(fdatasync,,
[AC_DEFINE(fdatasync, fsync, [Alias fdatasync() to fsync() if missing.])
])
......
......@@ -144,6 +144,10 @@ int strverscmp (const char *, const char *);
size_t strnlen (const char *, size_t);
#endif
#ifndef HAVE_STRNSTR
char * strnstr (const char *, const char *, size_t);
#endif
#ifndef HAVE_STRNDUP
char *strndup (const char *, size_t);
#endif
......
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