NetBSD/lib/libcurses/addbytes.c

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/* $NetBSD: addbytes.c,v 1.12 1998/02/03 19:12:16 perry Exp $ */
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/*
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* Copyright (c) 1987, 1993, 1994
* The Regents of the University of California. All rights reserved.
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*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS 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 THE REGENTS OR 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.
*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)addbytes.c 8.4 (Berkeley) 5/4/94";
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#else
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__RCSID("$NetBSD: addbytes.c,v 1.12 1998/02/03 19:12:16 perry Exp $");
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#endif
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#endif /* not lint */
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#include "curses.h"
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#define SYNCH_IN {y = win->cury; x = win->curx;}
#define SYNCH_OUT {win->cury = y; win->curx = x;}
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/*
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* waddbytes --
* Add the character to the current position in the given window.
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*/
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int
__waddbytes(win, bytes, count, so)
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WINDOW *win;
const char *bytes;
int count;
int so;
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{
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static char blanks[] = " ";
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int c, newx, x, y;
char stand;
__LINE *lp;
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SYNCH_IN;
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while (count--) {
c = *bytes++;
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#ifdef DEBUG
__CTRACE("ADDBYTES('%c') at (%d, %d)\n", c, y, x);
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#endif
switch (c) {
case '\t':
SYNCH_OUT;
if (waddbytes(win, blanks, 8 - (x % 8)) == ERR)
return (ERR);
SYNCH_IN;
break;
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default:
#ifdef DEBUG
__CTRACE("ADDBYTES(%0.2o, %d, %d)\n", win, y, x);
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#endif
lp = win->lines[y];
if (lp->flags & __ISPASTEOL) {
lp->flags &= ~__ISPASTEOL;
newline: if (y == win->maxy - 1) {
if (win->flags & __SCROLLOK) {
SYNCH_OUT;
scroll(win);
SYNCH_IN;
lp = win->lines[y];
x = 0;
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} else
return (ERR);
} else {
y++;
lp = win->lines[y];
x = 0;
}
if (c == '\n')
break;
}
stand = '\0';
if (win->flags & __WSTANDOUT || so)
stand |= __STANDOUT;
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#ifdef DEBUG
__CTRACE("ADDBYTES: 1: y = %d, x = %d, firstch = %d, lastch = %d\n",
y, x, *win->lines[y]->firstchp, *win->lines[y]->lastchp);
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#endif
if (lp->line[x].ch != c ||
!(lp->line[x].attr & stand)) {
newx = x + win->ch_off;
if (!(lp->flags & __ISDIRTY)) {
lp->flags |= __ISDIRTY;
*lp->firstchp = *lp->lastchp = newx;
}
else if (newx < *lp->firstchp)
*lp->firstchp = newx;
else if (newx > *lp->lastchp)
*lp->lastchp = newx;
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#ifdef DEBUG
__CTRACE("ADDBYTES: change gives f/l: %d/%d [%d/%d]\n",
*lp->firstchp, *lp->lastchp,
*lp->firstchp - win->ch_off,
*lp->lastchp - win->ch_off);
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#endif
}
lp->line[x].ch = c;
if (stand)
lp->line[x].attr |= __STANDOUT;
else
lp->line[x].attr &= ~__STANDOUT;
if (x == win->maxx - 1)
lp->flags |= __ISPASTEOL;
else
x++;
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#ifdef DEBUG
__CTRACE("ADDBYTES: 2: y = %d, x = %d, firstch = %d, lastch = %d\n",
y, x, *win->lines[y]->firstchp, *win->lines[y]->lastchp);
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#endif
break;
case '\n':
SYNCH_OUT;
wclrtoeol(win);
SYNCH_IN;
if (!NONL)
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x = 0;
goto newline;
case '\r':
x = 0;
break;
case '\b':
if (--x < 0)
x = 0;
break;
}
}
SYNCH_OUT;
return (OK);
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}