RedAlert/WIN32LIB/MISC/IRANDOM.CPP

/*
**	Command & Conquer Red Alert(tm)
**	Copyright 2025 Electronic Arts 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 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.
**
**	You should have received a copy of the GNU General Public License
**	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/***************************************************************************
 **   C O N F I D E N T I A L --- W E S T W O O D   A S S O C I A T E S   **
 ***************************************************************************
 *                                                                         *
 *                 Project Name : LIBRARY                                  *
 *                                                                         *
 *                    File Name : IRANDOM.C                                *
 *                                                                         *
 *                   Programmer : Barry W. Green                           *
 *                                                                         *
 *                  Last Update : 10 Feb, 1995     [BWG]                   *
 *                                                                         *
 *-------------------------------------------------------------------------*
 * Functions:                                                              *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

#include <stdlib.h>
#include <time.h>
#include "misc.h"






/* IRANDOM ----------------------------------------------------------

   IRandom returns a random value between min and max inclusive.

   INPUTS:	int min and int max

   RETURNS:	int random number
*/

int IRandom(int minval, int maxval)
{
	int num,mask;

	// Keep minval and maxval straight.
	if (minval > maxval) {
		minval ^= maxval;
		maxval ^= minval;
		minval ^= maxval;
	}

	mask = Get_Random_Mask(maxval - minval);

	while( (num = (rand() & mask) + minval) > maxval ) ;
	return(num);
}