1 /* $NetBSD: in_wch.c,v 1.8 2022/01/25 03:05:06 blymn Exp $ */
2
3 /*
4 * Copyright (c) 2005 The NetBSD Foundation Inc.
5 * All rights reserved.
6 *
7 * This code is derived from code donated to the NetBSD Foundation
8 * by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>.
9 *
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the NetBSD Foundation nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
24 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
25 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <sys/cdefs.h>
38 #ifndef lint
39 __RCSID("$NetBSD: in_wch.c,v 1.8 2022/01/25 03:05:06 blymn Exp $");
40 #endif /* not lint */
41
42 #include "curses.h"
43 #include "curses_private.h"
44
45 /*
46 * in_wch --
47 * Return wide character at cursor position from stdscr.
48 */
49 int
in_wch(cchar_t * wcval)50 in_wch(cchar_t *wcval)
51 {
52 return win_wch(stdscr, wcval);
53 }
54
55 /*
56 * mvin_wch --
57 * Return wide character at position (y, x) from stdscr.
58 */
59 int
mvin_wch(int y,int x,cchar_t * wcval)60 mvin_wch(int y, int x, cchar_t *wcval)
61 {
62 return mvwin_wch(stdscr, y, x, wcval);
63 }
64
65 /*
66 * mvwin_wch --
67 * Return wide character at position (y, x) from the given window.
68 */
69 int
mvwin_wch(WINDOW * win,int y,int x,cchar_t * wcval)70 mvwin_wch(WINDOW *win, int y, int x, cchar_t *wcval)
71 {
72 if (wmove(win, y, x) == ERR)
73 return ERR;
74
75 return win_wch(win, wcval);
76 }
77
78 /*
79 * win_wch --
80 * Return wide character at cursor position.
81 */
82 int
win_wch(WINDOW * win,cchar_t * wcval)83 win_wch(WINDOW *win, cchar_t *wcval)
84 {
85 nschar_t *np;
86 __LDATA *lp = &win->alines[win->cury]->line[win->curx];
87 int cw = lp->wcols;
88
89 if (cw < 0)
90 lp += cw;
91 wcval->vals[0] = lp->ch;
92 wcval->attributes = lp->attr;
93 wcval->elements = 1;
94 np = lp->nsp;
95 if (np) {
96 do {
97 wcval->vals[wcval->elements++] = np->ch;
98 np = np-> next;
99 } while (np);
100 }
101
102 return OK;
103 }
104