c_cpp/etc/calc/have_newstr.c

   1 /*
   2  * have_newstr - Determine if we have a system without ANSI C string functions
   3  *
   4  * Copyright (C) 1999  Landon Curt Noll
   5  *
   6  * Calc is open software; you can redistribute it and/or modify it under
   7  * the terms of the version 2.1 of the GNU Lesser General Public License
   8  * as published by the Free Software Foundation.
   9  *
  10  * Calc is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
  13  * Public License for more details.
  14  *
  15  * A copy of version 2.1 of the GNU Lesser General Public License is
  16  * distributed with calc under the filename COPYING-LGPL.  You should have
  17  * received a copy with calc; if not, write to Free Software Foundation, Inc.
  18  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19  *
  20  * @(#) $Revision: 30.1 $
  21  * @(#) $Id: have_newstr.c,v 30.1 2007/03/16 11:09:46 chongo Exp $
  22  * @(#) $Source: /usr/local/src/bin/calc/RCS/have_newstr.c,v $
  23  *
  24  * Under source code control:   1995/05/02 03:55:08
  25  * File existed as early as:    1995
  26  *
  27  * chongo <was here> /\oo/\     http://www.isthe.com/chongo/
  28  * Share and enjoy!  :-)        http://www.isthe.com/chongo/tech/comp/calc/
  29  */
  30
  31 /*
  32  * usage:
  33  *      have_newstr
  34  *
  35  * Not all systems support all ANSI C string functions, so this may not
  36  * compile on your system.
  37  *
  38  * This prog outputs several defines:
  39  *
  40  *      HAVE_NEWSTR
  41  *              defined ==> use memcpy(), memset(), strchr()
  42  *              undefined ==> use bcopy() instead of memcpy(),
  43  *                            use bfill() instead of memset(),
  44  *                            use index() instead of strchr()
  45  */
  46
  47
  48 #include <stdio.h>
  49
  50 #define MOVELEN 3
  51
  52 char src[] = "chongo was here";
  53 char dest[MOVELEN+1];
  54
  55 int
  56 main(void)
  57 {
  58 #if defined(HAVE_NO_NEWSTR)
  59
  60         printf("#undef HAVE_NEWSTR /* no */\n");
  61
  62 #else /* HAVE_NO_NEWSTR */
  63
  64         (void) memcpy(dest, src, MOVELEN);
  65         (void) memset(dest, 0, MOVELEN);
  66         (void) strchr(src, 'e');
  67
  68         printf("#define HAVE_NEWSTR /* yes */\n");
  69
  70 #endif /* HAVE_NO_NEWSTR */
  71
  72         /* exit(0); */
  73         return 0;
  74 }