glibc/debug/stpcpy_chk.c

45 lines
1.2 KiB
C

/* Copyright (C) 1992, 1995, 1997, 2002, 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, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
char *
__stpcpy_chk (dest, src, destlen)
char *dest;
const char *src;
size_t destlen;
{
register char *d = dest;
register const char *s = src;
do
{
if (__builtin_expect (destlen-- == 0, 0))
__chk_fail ();
*d++ = *s;
}
while (*s++ != '\0');
return d - 1;
}