#ifndef lint
static const char	RCSid[] = "$Id: editline.c,v 2.4 2003/02/22 02:07:28 greg Exp $";
#endif
/*
 *  editline.c - routine for editing raw input for rview.
 *
 *  External symbols declared in driver.h
 */

/* ====================================================================
 * 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 "color.h"

#include "driver.h"

#define iscntrl(c)	((c) < ' ')
#define isblank(c)	((c) == ' ')
#define iserase(c)	((c) == '\b' || (c) == 127)
#define iswerase(c)	((c) == 'W'-'@')
#define iskill(c)	((c) == 'U'-'@' || (c) == 'X'-'@')


void
editline(buf, c_get, s_put)	/* edit input line */
char  *buf;
int  (*c_get)();
void  (*s_put)();
{
	static char  erases[] = "\b \b";
	static char  obuf[4];
	register int  i;
	register int  c;
	
	i = 0;
	while ((c = (*c_get)()&0177) != '\n' && c != '\r')
		if (iserase(c)) {		/* single char erase */
			if (i > 0) {
				(*s_put)(erases);
				--i;
			}
		} else if (iswerase(c)) {	/* word erase */
			while (i > 0 && isblank(buf[i-1])) {
				(*s_put)(erases);
				--i;
			}
			while (i > 0 && !isblank(buf[i-1])) {
				(*s_put)(erases);
				--i;
			}
		} else if (iskill(c)) {		/* kill line */
			while (i > 0) {
				(*s_put)(erases);
				--i;
			}
		} else if (iscntrl(c)) {		/* control char */
			i = 0;
			buf[i++] = c;
			obuf[0] = '^'; obuf[1] = c|0100; obuf[2] = '\0';
			(*s_put)(obuf);
			break;
		} else {				/* regular char */
			buf[i++] = c;
			obuf[0] = c; obuf[1] = '\0';
			(*s_put)(obuf);
		}
	buf[i] = '\0';
	(*s_put)("\n");
}


static char  mybuf[512];


void
tocombuf(b, d)				/* add command(s) to my buffer */
register char  *b;
register struct driver  *d;
{
	register char  *cp;
	char  *comstart;

	for (cp = mybuf; *cp; cp++)
		;
	comstart = cp;
	while (*cp++ = *b)
		if (cp >= mybuf+sizeof(mybuf)) {
			*comstart = '\0';
			return;		/* what should I do about this? */
		} else if (*b++ == '\n') {
			d->inpready++;
			comstart = cp;
		}
}


int
fromcombuf(b, d)			/* get command from my buffer */
char  *b;
struct driver  *d;
{
	register char	*cp;
						/* get next command */
	for (cp = mybuf; *cp != '\n'; cp++)
		if (!*cp)
			return(0);
	*cp++ = '\0';
#ifdef DEBUG
	(*d->comout)(mybuf);			/* echo my command */
	(*d->comout)("\n");
#endif
						/* send it as reply */
	strcpy(b, mybuf);
	d->inpready--;
						/* advance commands */
	strcpy(mybuf, cp);
	return(1);
}