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insch.c revision 1.8 
      1 /*	$NetBSD: insch.c,v 1.8 1997/07/22 07:36:48 mikel Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1981, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)insch.c	8.2 (Berkeley) 5/4/94";
     40 #else
     41 __RCSID("$NetBSD: insch.c,v 1.8 1997/07/22 07:36:48 mikel Exp $");
     42 #endif
     43 #endif	/* not lint */
     44 
     45 #include <string.h>
     46 
     47 #include "curses.h"
     48 
     49 /*
     50  * winsch --
     51  *	Do an insert-char on the line, leaving (cury, curx) unchanged.
     52  */
     53 int
     54 winsch(win, ch)
     55 	register WINDOW *win;
     56 	int ch;
     57 {
     58 
     59 	register __LDATA *end, *temp1, *temp2;
     60 
     61 	end = &win->lines[win->cury]->line[win->curx];
     62 	temp1 = &win->lines[win->cury]->line[win->maxx - 1];
     63 	temp2 = temp1 - 1;
     64 	while (temp1 > end) {
     65 		(void)memcpy(temp1, temp2, sizeof(__LDATA));
     66 		temp1--, temp2--;
     67 	}
     68 	temp1->ch = ch;
     69 	temp1->attr &= ~__STANDOUT;
     70 	__touchline(win, win->cury, win->curx, win->maxx - 1, 0);
     71 	if (win->cury == LINES - 1 &&
     72 	    (win->lines[LINES - 1]->line[COLS - 1].ch != ' ' ||
     73 	    win->lines[LINES -1]->line[COLS - 1].attr != 0))
     74 		if (win->flags & __SCROLLOK) {
     75 			wrefresh(win);
     76 			scroll(win);
     77 			win->cury--;
     78 		} else
     79 			return (ERR);
     80 	return (OK);
     81 }
     82