sysdeps/generic/strcpy.c

   1 /* Copyright (C) 1991 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <stddef.h>
  21 #include <string.h>
  22 #include <memcopy.h>
  23
  24 /* Copy SRC to DEST.  */
  25 char *
  26 DEFUN(strcpy, (dest, src), char *dest AND CONST char *src)
  27 {
  28   reg_char c;
  29   char *s = (char *) src;
  30   CONST ptrdiff_t off = dest - src - 1;
  31
  32   do
  33     {
  34       c = *s++;
  35       s[off] = c;
  36     }
  37   while (c != '\0');
  38
  39   return dest;
  40 }
  41