gno/lib/libcurses/addbytes.c

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1997-10-01 02:57:29 +00:00
/*
* Copyright (c) 1987, 1993, 1994
* The Regents of the University of California. 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. 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.
*/
#ifndef lint
static char sccsid[] = "@(#)addbytes.c 8.4 (Berkeley) 5/4/94";
#endif /* not lint */
#include "curses.h"
#define SYNCH_IN {y = win->cury; x = win->curx;}
#define SYNCH_OUT {win->cury = y; win->curx = x;}
/*
* waddbytes --
* Add the character to the current position in the given window.
*/
int
__waddbytes(WINDOW *win, const char *bytes, int count, int so)
1997-10-01 02:57:29 +00:00
{
static char blanks[] = " ";
register int c, newx, x, y;
char stand;
__LINE *lp;
SYNCH_IN;
#ifdef DEBUG
__CTRACE("ADDBYTES('%c') at (%d, %d)\n", c, y, x);
#endif
while (count--) {
c = *bytes++;
switch (c) {
case '\t':
SYNCH_OUT;
if (waddbytes(win, blanks, 8 - (x % 8)) == ERR)
return (ERR);
SYNCH_IN;
break;
default:
#ifdef DEBUG
__CTRACE("ADDBYTES(%0.2o, %d, %d)\n", win, y, x);
#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;
} else
return (ERR);
} else {
y++;
lp = win->lines[y];
x = 0;
}
if (c == '\n')
break;
}
stand = '\0';
if (win->flags & __WSTANDOUT || so)
stand |= __STANDOUT;
#ifdef DEBUG
__CTRACE("ADDBYTES: 1: y = %d, x = %d, firstch = %d, lastch = %d\n",
y, x, *win->lines[y]->firstchp, *win->lines[y]->lastchp);
#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;
#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);
#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++;
#ifdef DEBUG
__CTRACE("ADDBYTES: 2: y = %d, x = %d, firstch = %d, lastch = %d\n",
y, x, *win->lines[y]->firstchp, *win->lines[y]->lastchp);
#endif
break;
case '\n':
SYNCH_OUT;
wclrtoeol(win);
SYNCH_IN;
if (!NONL)
x = 0;
goto newline;
case '\r':
x = 0;
break;
case '\b':
if (--x < 0)
x = 0;
break;
}
}
SYNCH_OUT;
return (OK);
}