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Diffstat (limited to 'gcc-4.7/libiberty/memmem.c')
-rw-r--r-- | gcc-4.7/libiberty/memmem.c | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/gcc-4.7/libiberty/memmem.c b/gcc-4.7/libiberty/memmem.c deleted file mode 100644 index 147253f5b..000000000 --- a/gcc-4.7/libiberty/memmem.c +++ /dev/null @@ -1,71 +0,0 @@ -/* Copyright (C) 1991,92,93,94,96,97,98,2000,2004,2007,2011 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, 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 General Public License for more details. - - You should have received a copy of the GNU 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. */ - -/* - -@deftypefn Supplemental void* memmem (const void *@var{haystack}, @ - size_t @var{haystack_len} const void *@var{needle}, size_t @var{needle_len}) - -Returns a pointer to the first occurrence of @var{needle} (length -@var{needle_len}) in @var{haystack} (length @var{haystack_len}). -Returns @code{NULL} if not found. - -@end deftypefn - -*/ - -#ifndef _LIBC -# include <config.h> -#endif - -#include <stddef.h> -#include <string.h> - -#ifndef _LIBC -# define __builtin_expect(expr, val) (expr) -#endif - -#undef memmem - -/* Return the first occurrence of NEEDLE in HAYSTACK. */ -void * -memmem (const void *haystack, size_t haystack_len, const void *needle, - size_t needle_len) -{ - const char *begin; - const char *const last_possible - = (const char *) haystack + haystack_len - needle_len; - - if (needle_len == 0) - /* The first occurrence of the empty string is deemed to occur at - the beginning of the string. */ - return (void *) haystack; - - /* Sanity check, otherwise the loop might search through the whole - memory. */ - if (__builtin_expect (haystack_len < needle_len, 0)) - return NULL; - - for (begin = (const char *) haystack; begin <= last_possible; ++begin) - if (begin[0] == ((const char *) needle)[0] && - !memcmp ((const void *) &begin[1], - (const void *) ((const char *) needle + 1), - needle_len - 1)) - return (void *) begin; - - return NULL; -} |