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glibc  2.9
stpcpy_chk.c
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00001 /* Copyright (C) 1992, 1995, 1997, 2002, 2004 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #ifdef HAVE_CONFIG_H
00020 # include <config.h>
00021 #endif
00022 
00023 #include <string.h>
00024 
00025 
00026 /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST.  */
00027 char *
00028 __stpcpy_chk (dest, src, destlen)
00029      char *dest;
00030      const char *src;
00031      size_t destlen;
00032 {
00033   register char *d = dest;
00034   register const char *s = src;
00035 
00036   do
00037     {
00038       if (__builtin_expect (destlen-- == 0, 0))
00039        __chk_fail ();
00040       *d++ = *s;
00041     }
00042   while (*s++ != '\0');
00043 
00044   return d - 1;
00045 }