newtree/source/buildnum.c

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/*
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buildnum.c
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build number function
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Copyright (C) 1996-1997 Id Software, Inc.
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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.
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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.
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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
$Id$
*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
#include <string.h>
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//char *date = "Dec 21 1999";
static char *date = __DATE__ ;
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 )
{
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;
}