install approved copyright notice
[unix-history] / usr / src / lib / libcurses / addbytes.c
/*
* Copyright (c) 1987 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)addbytes.c 5.3 (Berkeley) %G%";
#endif /* not lint */
# include "curses.ext"
/*
* This routine adds the character to the current position
*
*/
waddbytes(win, bytes, count)
reg WINDOW *win;
reg char *bytes;
reg int count;
{
#define SYNCH_OUT() {win->_cury = y; win->_curx = x;}
#define SYNCH_IN() {y = win->_cury; x = win->_curx;}
reg int x, y;
reg int newx;
SYNCH_IN();
# ifdef FULLDEBUG
fprintf(outf, "ADDBYTES('%c') at (%d, %d)\n", c, y, x);
# endif
while (count--) {
register int c;
static char blanks[] = " ";
c = *bytes++;
switch (c) {
case '\t':
SYNCH_IN();
if (waddbytes(win, blanks, 8-(x%8)) == ERR) {
return ERR;
}
SYNCH_OUT();
break;
default:
# ifdef FULLDEBUG
fprintf(outf, "ADDBYTES: 1: y = %d, x = %d, firstch = %d, lastch = %d\n", y, x, win->_firstch[y], win->_lastch[y]);
# endif
if (win->_flags & _STANDOUT)
c |= _STANDOUT;
{
# ifdef FULLDEBUG
fprintf(outf, "ADDBYTES(%0.2o, %d, %d)\n", win, y, x);
# endif
if (win->_y[y][x] != c) {
newx = x + win->_ch_off;
if (win->_firstch[y] == _NOCHANGE) {
win->_firstch[y] =
win->_lastch[y] = newx;
} else if (newx < win->_firstch[y])
win->_firstch[y] = newx;
else if (newx > win->_lastch[y])
win->_lastch[y] = newx;
# ifdef FULLDEBUG
fprintf(outf, "ADDBYTES: change gives f/l: %d/%d [%d/%d]\n",
win->_firstch[y], win->_lastch[y],
win->_firstch[y] - win->_ch_off,
win->_lastch[y] - win->_ch_off);
# endif
}
}
win->_y[y][x++] = c;
if (x >= win->_maxx) {
x = 0;
newline:
if (++y >= win->_maxy)
if (win->_scroll) {
SYNCH_OUT();
scroll(win);
SYNCH_IN();
--y;
}
else
return ERR;
}
# ifdef FULLDEBUG
fprintf(outf, "ADDBYTES: 2: y = %d, x = %d, firstch = %d, lastch = %d\n", y, x, win->_firstch[y], win->_lastch[y]);
# 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;
}