/* unsigned long dtoul(x)
 *
 * ARGUMENT
 *	DEC	*x;
 *
 * DESCRIPTION
 *	Converts a DEC to an unsigned long.
 *
 * SIDE	EFFECTS
 *	None.
 *
 * RETURNS
 *	The long if the	conversion is successful, and the error	code
 * otherwise.
 *
 * POSSIBLE ERROR CODES
 *
 *	GM_NULLPOINTER
 *	GM_CNVRE
 *	GM_CNVRW
 *
 * AUTHOR
 *  Jared Levy	Feb. 9,	1987
 *   Copyright (C) 1987-1990 Greenleaf Software	Inc.  All rights reserved.
 *
 * MODIFICATIONS
 *
 */

#include <stdio.h>
#include "gm.h"
#include "gmsystem.h"

unsigned long ConvDecimalToUnsLong(x)
DEC	*x;
{
	DEC	t;
	DEC	*pt;
	unsigned long	i;

	_MacStart(GM_DTOUL);
	_MacInVar(x, 0L);

	pt=&t;
	(void) _ScaleDec80Bit(pt, x, 0);

/* 0 <=	x < 2^32 */
	if (!_MacIsDecN(pt) && (pt->ls.lsl[1] == 0) && (pt->dc.msd == 0))  {
		if (CompareDecimal(pt,x)!=0)
			_MacErr(GM_CNVRW);
		i = pt->ls.lsl[0];
		_MacRet	(i);
	}

/* overflow */
	_MacErr(GM_CNVRE);
	_MacRet((unsigned) 0L);
}