delch.c revision 1.20 1 /* $NetBSD: delch.c,v 1.20 2007/05/28 15:01:55 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. 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 1.20 2007/05/28 15:01:55 blymn Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include <string.h>
42 #include <stdlib.h>
43
44 #include "curses.h"
45 #include "curses_private.h"
46
47 #ifndef _CURSES_USE_MACROS
48 /*
49 * delch --
50 * Do a delete-char on the line, leaving (cury, curx) unchanged.
51 */
52 int
53 delch(void)
54 {
55 return wdelch(stdscr);
56 }
57
58 /*
59 * mvdelch --
60 * Do a delete-char on the line at (y, x) on stdscr.
61 */
62 int
63 mvdelch(int y, int x)
64 {
65 return mvwdelch(stdscr, y, x);
66 }
67
68 /*
69 * mvwdelch --
70 * Do a delete-char on the line at (y, x) of the given window.
71 */
72 int
73 mvwdelch(WINDOW *win, int y, int x)
74 {
75 if (wmove(win, y, x) == ERR)
76 return ERR;
77
78 return wdelch(win);
79 }
80
81 #endif
82
83 /*
84 * wdelch --
85 * Do a delete-char on the line, leaving (cury, curx) unchanged.
86 */
87 int
88 wdelch(WINDOW *win)
89 {
90 __LDATA *end, *temp1, *temp2;
91
92 #ifndef HAVE_WCHAR
93 end = &win->lines[win->cury]->line[win->maxx - 1];
94 temp1 = &win->lines[win->cury]->line[win->curx];
95 temp2 = temp1 + 1;
96 while (temp1 < end) {
97 (void) memcpy(temp1, temp2, sizeof(__LDATA));
98 temp1++, temp2++;
99 }
100 temp1->ch = win->bch;
101 if (_cursesi_copy_nsp(win->bnsp, temp1) == ERR)
102 return ERR;
103 if (__using_color && win != curscr)
104 temp1->attr = win->battr & __COLOR;
105 else
106 temp1->attr = 0;
107 SET_WCOL( *temp1, 1 );
108 __touchline(win, (int) win->cury, (int) win->curx, (int) win->maxx - 1);
109 return (OK);
110 #else
111 int cw, sx;
112 nschar_t *np, *tnp;
113
114 end = &win->lines[win->cury]->line[win->maxx - 1];
115 sx = win->curx;
116 temp1 = &win->lines[win->cury]->line[win->curx];
117 cw = WCOL( *temp1 );
118 if ( cw < 0 ) {
119 temp1 += cw;
120 sx += cw;
121 cw = WCOL( *temp1 );
122 }
123 np = temp1->nsp;
124 if (np) {
125 while ( np ) {
126 tnp = np->next;
127 free( np );
128 np = tnp;
129 }
130 temp1->nsp = NULL;
131 }
132 if ( sx + cw < win->maxx ) {
133 temp2 = temp1 + cw;
134 while ( temp1 < end - ( cw - 1 )) {
135 ( void )memcpy( temp1, temp2, sizeof( __LDATA ));
136 temp1++, temp2++;
137 }
138 }
139 while ( temp1 <= end ) {
140 temp1->ch = ( wchar_t )btowc(( int ) win->bch );
141 temp1->attr = 0;
142 if (_cursesi_copy_nsp(win->bnsp, temp1) == ERR)
143 return ERR;
144 SET_WCOL(*temp1, 1);
145 temp1++;
146 }
147 __touchline(win, (int) win->cury, sx, (int) win->maxx - 1);
148 return (OK);
149 #endif /* HAVE_WCHAR */
150 }
151