/*
build.c - returns a build number
Copyright (C) 2013 hzqst

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 3 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.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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 };

// returns days since Feb 13 2007
int getbuildnum(void)
{

	int m = 0, d = 0, y = 0;
	static int b = 0;

	if( b != 0 ) return b;

	for( m = 0; m < 11; m++ )
	{
		if( !strnicmp( &date[0], mon[m], 3 ))
			break;
		d += mond[m];
	}

	d += atoi( &date[4] ) - 1;
	y = atoi( &date[7] ) - 1900;
	b = d + (int)((y - 1) * 365.25f );

	if((( y % 4 ) == 0 ) && m > 1 )
	{
		b += 1;
	}
	b -= 38752+2220; // Feb 13 2007 // 2013-3-13

	return b;
}