/* $Log:	firstpar.c,v $
 * Revision 0.8  92/11/23  19:46:45  19:46:45  bt (Bo Thide')
 * Fixed resolution bug. Portable downloading. Added/changed options. PJXL color support
 * 
 * Revision 0.7  92/11/13  02:41:29  02:41:29  bt (Bo Thide')
 * More bug fixes and improvements. Support for PaintJet XL
 * 
 * Revision 0.6  92/11/10  21:47:45  21:47:45  bt (Bo Thide')
 * Bug fixes. Added -R option. Better font handling.
 * 
 * Revision 0.5  92/11/09  16:25:32  16:25:32  bt (Bo Thide')
 * Rewrite of dospecial.c. Extended \special support
 * 
 * Revision 0.4  92/11/08  02:45:48  02:45:48  bt (Bo Thide')
 * Changed to portable bit manipulations. Replaced strrstr for non-POSIX compliant C. Fixed numerous bugs. Added support for more \special's.
 * 
 * Revision 0.3  92/08/24  12:45:40  12:45:40  bt (Bo Thide')
 * Fixed 8 bit (dc font) support.
 * 
 * Revision 0.2  92/08/23  17:28:57  17:28:57  bt (Bo Thide')
 * Source cleaned up.  Changed certain function calls.  Removed globals.
 * 
 * Revision 0.1  92/08/22  23:58:47  23:58:47  bt (Bo Thide')
 * First Release.
 *  */

#include <stdio.h>
#include "dvi.h"
#include "globals.h"
#include "macros.h"

static char rcsid[] = "$Header: firstpar.c,v 0.8 92/11/23 19:46:45 bt Exp $";

/*
 * This routine computes the first parameter of each dvi opcode.
 */
long firstpar(dvifile, k)
FILE	*dvifile;
int	k;
{
	switch (k)
	{ 
	case DVI_SET1:
	case DVI_PUT1:
	case DVI_FNT1:
	case DVI_XXX1:
	case DVI_FNT_DEF1:
		return((long)getubyte(dvifile));
		break;
	case DVI_SET2:
	case DVI_PUT2:
	case DVI_FNT2:
	case DVI_XXX2:
	case DVI_FNT_DEF2:
		return((long)getupair(dvifile));
		break;
	case DVI_SET3:
	case DVI_PUT3:
	case DVI_FNT3:
	case DVI_XXX3:
	case DVI_FNT_DEF3:
		return((long)getutrio(dvifile));
		break;
	case DVI_RIGHT1:
	case DVI_W1:
	case DVI_X1:
	case DVI_DOWN1:
	case DVI_Y1:
	case DVI_Z1:
		return((long)getsbyte(dvifile));
		break;
	case DVI_RIGHT2:
	case DVI_W2:
	case DVI_X2:
	case DVI_DOWN2:
	case DVI_Y2:
	case DVI_Z2:
		return((long)getspair(dvifile));
		break;
	case DVI_RIGHT3:
	case DVI_W3:
	case DVI_X3:
	case DVI_DOWN3:
	case DVI_Y3:
	case DVI_Z3:
		return((long)getstrio(dvifile));
		break;
	case DVI_SET4:
	case DVI_SET_RULE:
	case DVI_PUT4:
	case DVI_PUT_RULE:
	case DVI_RIGHT4:
	case DVI_W4:
	case DVI_X4:
	case DVI_DOWN4:
	case DVI_Y4:
	case DVI_Z4:
	case DVI_FNT4:
	case DVI_XXX4:
	case DVI_FNT_DEF4:
		return((long)getsquad(dvifile));
		break;
	case DVI_NOP:
	case DVI_BOP:
	case DVI_EOP:
	case DVI_PUSH:
	case DVI_POP:
	case DVI_PRE:
	case DVI_POST:
	case DVI_POSTPOST:
	case DVI_UNDEF0:
	case DVI_UNDEF1:
	case DVI_UNDEF2:
	case DVI_UNDEF3:
	case DVI_UNDEF4:
	case DVI_UNDEF5:
		return(0);
		break;
	case DVI_W0:
		return(w);
		break;
	case DVI_X0:
		return(x);
		break;
	case DVI_Y0:
		return(y);
		break;
	case DVI_Z0:
		return(z);
		break;
	default:
		if((k >= DVI_FNT_NUM_0) && (k <= DVI_FNT_NUM_63))
			return((long)(k - DVI_FNT_NUM_0));
		break;
	}
}