diff options
Diffstat (limited to 'sysdeps/generic/memmem.c')
-rw-r--r-- | sysdeps/generic/memmem.c | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/sysdeps/generic/memmem.c b/sysdeps/generic/memmem.c deleted file mode 100644 index c404621..0000000 --- a/sysdeps/generic/memmem.c +++ /dev/null @@ -1,58 +0,0 @@ -/* Copyright (C) 1991,92,93,94,96,97,98,2000,2004 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library 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. - - The GNU C Library 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 the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#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 (haystack, haystack_len, needle, needle_len) - 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; -} |