quakeforge/qw/source/buildnum.c

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/*
buildnum.c
build number function
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
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static const char rcsid[] =
"$Id$";
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
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# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
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# include <strings.h>
#endif
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#include <stdlib.h>
static char *date = __DATE__; // Was "Dec 21 1999"
static char *mon[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
"Aug", "Sep", "Oct", "Nov", "Dec" };
static char mond[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
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/* returns days since Dec 21 1999 */
int
build_number (void)
{
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int m = 0;
int d = 0;
int y = 0;
static int b = 0;
if (b != 0)
return b;
for (m = 0; m < 11; m++) {
if (strncasecmp (&date[0], mon[m], 3) == 0)
break;
d += mond[m];
}
d += atoi (&date[4]) - 1;
y = atoi (&date[7]) - 1900;
b = d + (int) ((y - 1) * 365.25);
if (((y % 4) == 0) && m > 1) {
b += 1;
}
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b -= 36148; // Dec 21 1999
return b;
}