#ifndef lint
static const char	RCSid[] = "$Id: calprnt.c,v 2.2 2003/02/22 02:07:21 greg Exp $";
#endif
/*
 *  calprint.c - routines for printing calcomp expressions.
 */

/* ====================================================================
 * The Radiance Software License, Version 1.0
 *
 * Copyright (c) 1990 - 2002 The Regents of the University of California,
 * through Lawrence Berkeley National Laboratory.   All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *         notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *           if any, must include the following acknowledgment:
 *             "This product includes Radiance software
 *                 (http://radsite.lbl.gov/)
 *                 developed by the Lawrence Berkeley National Laboratory
 *               (http://www.lbl.gov/)."
 *       Alternately, this acknowledgment may appear in the software itself,
 *       if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
 *       and "The Regents of the University of California" must
 *       not be used to endorse or promote products derived from this
 *       software without prior written permission. For written
 *       permission, please contact radiance@radsite.lbl.gov.
 *
 * 5. Products derived from this software may not be called "Radiance",
 *       nor may "Radiance" appear in their name, without prior written
 *       permission of Lawrence Berkeley National Laboratory.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.   IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Lawrence Berkeley National Laboratory.   For more
 * information on Lawrence Berkeley National Laboratory, please see
 * <http://www.lbl.gov/>.
 */

#include  <stdio.h>

#include  "calcomp.h"


void
eprint(ep, fp)			/* print a parse tree */
register EPNODE  *ep;
FILE  *fp;
{
    static EPNODE  *curdef = NULL;
    register EPNODE  *ep1;

    switch (ep->type) {

	case VAR:
	    fputs(ep->v.ln->name, fp);
	    break;

	case SYM:
	    fputs(ep->v.name, fp);
	    break;

	case FUNC:
	    eprint(ep->v.kid, fp);
	    fputc('(', fp);
	    ep1 = ep->v.kid->sibling;
	    while (ep1 != NULL) {
		eprint(ep1, fp);
		if ((ep1 = ep1->sibling) != NULL)
		    fputs(", ", fp);
	    }
	    fputc(')', fp);
	    break;

	case ARG:
	    if (curdef == NULL || curdef->v.kid->type != FUNC ||
			(ep1 = ekid(curdef->v.kid, ep->v.chan)) == NULL) {
		eputs("Bad argument!\n");
		quit(1);
	    }
	    eprint(ep1, fp);
	    break;

	case NUM:
	    fprintf(fp, "%.9g", ep->v.num);
	    break;

	case UMINUS:
	    fputc('-', fp);
	    eprint(ep->v.kid, fp);
	    break;

	case CHAN:
	    fprintf(fp, "$%d", ep->v.chan);
	    break;
	
	case '=':
	case ':':
	    ep1 = curdef;
	    curdef = ep;
	    eprint(ep->v.kid, fp);
	    fputc(' ', fp);
	    fputc(ep->type, fp);
	    fputc(' ', fp);
	    eprint(ep->v.kid->sibling, fp);
	    curdef = ep1;
	    break;
	    
	case '+':
	case '-':
	case '*':
	case '/':
	case '^':
	    fputc('(', fp);
	    eprint(ep->v.kid, fp);
	    fputc(' ', fp);
	    fputc(ep->type, fp);
	    fputc(' ', fp);
	    eprint(ep->v.kid->sibling, fp);
	    fputc(')', fp);
	    break;

	default:
	    eputs("Bad expression!\n");
	    quit(1);

    }

}


void
dprint(name, fp)		/* print a definition (all if no name) */
char  *name;
FILE  *fp;
{
    register EPNODE  *ep;
    
    if (name == NULL)
	for (ep = dfirst(); ep != NULL; ep = dnext()) {
	    eprint(ep, fp);
	    fputs(";\n", fp);
	}
    else if ((ep = dlookup(name)) != NULL) {
	eprint(ep, fp);
	fputs(";\n", fp);
    } else {
	wputs(name);
	wputs(": undefined\n");
    }
}