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77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* have_strlcat - determine if we have strlcat()
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*
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* Copyright (C) 2021 Landon Curt Noll
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*
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* Calc is open software; you can redistribute it and/or modify it under
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* the terms of the version 2.1 of the GNU Lesser General Public License
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* as published by the Free Software Foundation.
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*
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* Calc is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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* Public License for more details.
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*
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* A copy of version 2.1 of the GNU Lesser General Public License is
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* distributed with calc under the filename COPYING-LGPL. You should have
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* received a copy with calc; if not, write to Free Software Foundation, Inc.
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Under source code control: 2021/03/08 20:34:13
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* File existed as early as: 2021
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*
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* chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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* Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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*/
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/*
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* usage:
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* have_strlcat
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*
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* Not all systems have the strlcat() function, so this may not
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* compile on your system.
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*
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* This prog outputs several defines:
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*
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* HAVE_STRLCAT
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* defined ==> use strlcat()
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* undefined ==> do not or cannot call strlcat()
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*/
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#include <stdio.h>
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#include "have_string.h"
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#include "banned.h" /* include after system header <> includes */
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#define BUF_SIZ 5
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char src[BUF_SIZ+1] = "abcde";
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int
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main(void)
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{
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#if defined(HAVE_NO_STRLCAT)
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printf("#undef HAVE_STRLCAT /* no */\n");
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#else /* HAVE_NO_STRLCAT */
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char dst[BUF_SIZ+1+1];
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dst[0] = 'S';
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dst[1] = '\0';
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(void) strlcat(dst, src, sizeof(dst));
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printf("#define HAVE_STRLCAT /* yes */\n");
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#endif /* HAVE_NO_STRLCAT */
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/* exit(0); */
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return 0;
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}
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