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delch.c revision 1.17 
      1 /*	$NetBSD: delch.c,v 1.17 2004/01/20 08:28:26 wiz 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)delch.c	8.2 (Berkeley) 5/4/94";
     36 #else
     37 __RCSID("$NetBSD: delch.c,v 1.17 2004/01/20 08:28:26 wiz Exp $");
     38 #endif
     39 #endif				/* not lint */
     40 
     41 #include <string.h>
     42 
     43 #include "curses.h"
     44 #include "curses_private.h"
     45 
     46 #ifndef _CURSES_USE_MACROS
     47 /*
     48  * delch --
     49  *	Do a delete-char on the line, leaving (cury, curx) unchanged.
     50  */
     51 int
     52 delch(void)
     53 {
     54 	return wdelch(stdscr);
     55 }
     56 
     57 /*
     58  * mvdelch --
     59  *      Do a delete-char on the line at (y, x) on stdscr.
     60  */
     61 int
     62 mvdelch(int y, int x)
     63 {
     64 	return mvwdelch(stdscr, y, x);
     65 }
     66 
     67 /*
     68  * mvwdelch --
     69  *      Do a delete-char on the line at (y, x) of the given window.
     70  */
     71 int
     72 mvwdelch(WINDOW *win, int y, int x)
     73 {
     74 	if (wmove(win, y, x) == ERR)
     75 		return ERR;
     76 
     77 	return wdelch(win);
     78 }
     79 
     80 #endif
     81 
     82 /*
     83  * wdelch --
     84  *	Do a delete-char on the line, leaving (cury, curx) unchanged.
     85  */
     86 int
     87 wdelch(WINDOW *win)
     88 {
     89 	__LDATA *end, *temp1, *temp2;
     90 
     91 	end = &win->lines[win->cury]->line[win->maxx - 1];
     92 	temp1 = &win->lines[win->cury]->line[win->curx];
     93 	temp2 = temp1 + 1;
     94 	while (temp1 < end) {
     95 		(void) memcpy(temp1, temp2, sizeof(__LDATA));
     96 		temp1++, temp2++;
     97 	}
     98 	temp1->ch = ' ';
     99 	temp1->bch = win->bch;
    100 	temp1->attr = 0;
    101 	temp1->battr = win->battr;
    102 	__touchline(win, (int) win->cury, (int) win->curx, (int) win->maxx - 1);
    103 	return (OK);
    104 }
    105