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glibc  2.9
strcpy.c
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00001 /* Copyright (C) 1991, 1997, 2000, 2003 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 #include <stddef.h>
00020 #include <string.h>
00021 #include <memcopy.h>
00022 #include <bp-checks.h>
00023 
00024 #undef strcpy
00025 
00026 /* Copy SRC to DEST.  */
00027 char *
00028 strcpy (dest, src)
00029      char *dest;
00030      const char *src;
00031 {
00032   reg_char c;
00033   char *__unbounded s = (char *__unbounded) CHECK_BOUNDS_LOW (src);
00034   const ptrdiff_t off = CHECK_BOUNDS_LOW (dest) - s - 1;
00035   size_t n;
00036 
00037   do
00038     {
00039       c = *s++;
00040       s[off] = c;
00041     }
00042   while (c != '\0');
00043 
00044   n = s - src;
00045   (void) CHECK_BOUNDS_HIGH (src + n);
00046   (void) CHECK_BOUNDS_HIGH (dest + n);
00047 
00048   return dest;
00049 }
00050 libc_hidden_builtin_def (strcpy)