1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 1995, by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29/*
30 * wdelch.c
31 *
32 * XCurses Library
33 *
34 * Copyright 1990, 1995 by Mortice Kern Systems Inc.  All rights reserved.
35 *
36 */
37
38#ifdef M_RCSID
39#ifndef lint
40static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/wdelch.c 1.3 1995/06/21 20:30:59 ant Exp $";
41#endif
42#endif
43
44#include <private.h>
45
46/*f
47 * Delete the character under the cursor; all characters to the right of
48 * the cursor on the same line are moved to the left by one position and
49 * the last character on the line is filled with a blank. The cursor
50 * position does not change.
51 */
52int
53wdelch(w)
54WINDOW *w;
55{
56	extern void *memcpy();	/* quiet sparcv9 warning */
57	int next, width, y, x;
58
59#ifdef M_CURSES_TRACE
60	__m_trace("wdelch(%p) at (%d,%d)", w, w->_cury, w->_curx);
61#endif
62
63	y = w->_cury;
64	x = w->_curx;
65
66	next = __m_cc_next(w, y, x);
67	x = __m_cc_first(w, y, x);
68
69	/* Determine the character width to delete. */
70	width = __m_cc_width(&w->_line[y][x]);
71
72	/* Shift line left to erase the character under the cursor. */
73	(void) memcpy(
74		&w->_line[y][x], &w->_line[y][next],
75		(w->_maxx - next) * sizeof **w->_line
76	);
77
78	/* Add blank(s) to the end of line based on the width
79	 * of the character that was deleted.
80	 */
81	(void) __m_cc_erase(w, y, w->_maxx - width, y, w->_maxx - 1);
82
83	/* Set dity region markers. */
84	if (x < w->_first[y])
85		w->_first[y] = x;
86	w->_last[y] = w->_maxx;
87
88	WSYNC(w);
89
90	return __m_return_code("wdelch", WFLUSH(w));
91}
92