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Some folks might think: “you still use RCS”?!? And we will say, hey, at least we switched from SCCS to RCS back in … I think it was around 1994 ... at least we are keeping up! :-) :-) :-) Logs say that SCCS version 18 became RCS version 19 on 1994 March 18. RCS served us well. But now it is time to move on. And so we are switching to git. Calc releases produce a lot of file changes. In the 125 releases of calc since 1996, when I started managing calc releases, there have been 15473 file mods!
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
/*
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* have_offscl - determine if we have a scalar off_t element
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*
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* Copyright (C) 1999 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: 1996/07/13 12:57:22
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* File existed as early as: 1996
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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_offscl
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*
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* On some systems, off_t is a scalar value on which one can perform
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* arithmetic operations, assignments and comparisons. On some systems
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* off_t is some sort of union or struct which must be converted into
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* a ZVALUE in order to perform arithmetic operations, assignments and
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* comparisons.
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*
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*
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* This prog outputs several defines:
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*
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* HAVE_OFF_T_SCALAR
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* defined ==> ok to perform arithmetic ops, = and comparisons
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* undefined ==> convert to ZVALUE first
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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int
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main(void)
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{
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#if !defined(OFF_T_NON_SCALAR)
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off_t value; /* an off_t to perform arithmatic on */
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off_t value2; /* an off_t to perform arithmatic on */
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/*
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* do some math opts on an off_t
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*/
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value = (off_t)getpid();
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value2 = (off_t)-1;
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if (value > (off_t)1) {
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--value;
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}
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#if !defined(_WIN32)
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if (value <= (off_t)getppid()) {
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--value;
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}
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#endif
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if (value == value2) {
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value += value2;
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}
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value <<= 1;
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if (!value) {
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printf("/* something for the off_t to do */\n");
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}
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/*
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* report off_t as a scalar
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*/
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printf("#undef HAVE_OFF_T_SCALAR\n");
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printf("#define HAVE_OFF_T_SCALAR /* off_t is a simple value */\n");
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#else
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printf("#undef HAVE_OFF_T_SCALAR /* off_t is not a simple value */\n");
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#endif
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/* exit(0); */
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return 0;
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}
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