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 /*
28 * wdelch.c
29 *
30 * XCurses Library
31 *
32 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved.
33 *
34 */
35
36 #ifdef M_RCSID
37 #ifndef lint
38 static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/wdelch.c 1.3 1995/06/21 20:30:59 ant Exp $";
39 #endif
40 #endif
41
42 #include <private.h>
43
44 /*f
45 * Delete the character under the cursor; all characters to the right of
46 * the cursor on the same line are moved to the left by one position and
47 * the last character on the line is filled with a blank. The cursor
48 * position does not change.
49 */
50 int
wdelch(w)51 wdelch(w)
52 WINDOW *w;
53 {
54 extern void *memcpy(); /* quiet sparcv9 warning */
55 int next, width, y, x;
56
57 #ifdef M_CURSES_TRACE
58 __m_trace("wdelch(%p) at (%d,%d)", w, w->_cury, w->_curx);
59 #endif
60
61 y = w->_cury;
62 x = w->_curx;
63
64 next = __m_cc_next(w, y, x);
65 x = __m_cc_first(w, y, x);
66
67 /* Determine the character width to delete. */
68 width = __m_cc_width(&w->_line[y][x]);
69
70 /* Shift line left to erase the character under the cursor. */
71 (void) memcpy(
72 &w->_line[y][x], &w->_line[y][next],
73 (w->_maxx - next) * sizeof **w->_line
74 );
75
76 /* Add blank(s) to the end of line based on the width
77 * of the character that was deleted.
78 */
79 (void) __m_cc_erase(w, y, w->_maxx - width, y, w->_maxx - 1);
80
81 /* Set dity region markers. */
82 if (x < w->_first[y])
83 w->_first[y] = x;
84 w->_last[y] = w->_maxx;
85
86 WSYNC(w);
87
88 return __m_return_code("wdelch", WFLUSH(w));
89 }
90