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delch.c revision 1.12 
      1 /*	$NetBSD: delch.c,v 1.12 2000/04/15 13:17:03 blymn 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[] = "@(#)delch.c	8.2 (Berkeley) 5/4/94";
     40 #else
     41 __RCSID("$NetBSD: delch.c,v 1.12 2000/04/15 13:17:03 blymn Exp $");
     42 #endif
     43 #endif				/* not lint */
     44 
     45 #include <string.h>
     46 
     47 #include "curses.h"
     48 #include "curses_private.h"
     49 
     50 #ifndef _CURSES_USE_MACROS
     51 /*
     52  * delch --
     53  *	Do an insert-char on the line, leaving (cury, curx) unchanged.
     54  */
     55 int
     56 delch(void)
     57 {
     58 	return wdelch(stdscr);
     59 }
     60 
     61 /*
     62  * mvdelch --
     63  *      Do an insert-char on the line at (y, x) on stdscr.
     64  */
     65 int
     66 mvdelch(int y, int x)
     67 {
     68 	return mvwdelch(stdscr, y, x);
     69 }
     70 
     71 /*
     72  * mvwdelch --
     73  *      Do an insert-char on the line at (y, x) of the given window.
     74  */
     75 int
     76 mvwdelch(WINDOW *win, int y, int x)
     77 {
     78 	if (wmove(win, y, x) == ERR)
     79 		return ERR;
     80 
     81 	return wdelch(win);
     82 }
     83 
     84 #endif
     85 
     86 /*
     87  * wdelch --
     88  *	Do an insert-char on the line, leaving (cury, curx) unchanged.
     89  */
     90 int
     91 wdelch(WINDOW *win)
     92 {
     93 	__LDATA *end, *temp1, *temp2;
     94 
     95 	end = &win->lines[win->cury]->line[win->maxx - 1];
     96 	temp1 = &win->lines[win->cury]->line[win->curx];
     97 	temp2 = temp1 + 1;
     98 	while (temp1 < end) {
     99 		(void) memcpy(temp1, temp2, sizeof(__LDATA));
    100 		temp1++, temp2++;
    101 	}
    102 	temp1->ch = ' ';
    103 	temp1->attr = 0;
    104 	__touchline(win, (int) win->cury, (int) win->curx, (int) win->maxx - 1, 0);
    105 	return (OK);
    106 }
    107