1 /* $NetBSD: in_wch.c,v 1.9 2024/12/23 02:58:03 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 1.9 2024/12/23 02:58:03 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 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 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 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 83 win_wch(WINDOW *win, cchar_t *wcval) 84 { 85 if (__predict_false(win == NULL)) 86 return ERR; 87 88 nschar_t *np; 89 __LDATA *lp = &win->alines[win->cury]->line[win->curx]; 90 int cw = lp->wcols; 91 92 if (cw < 0) 93 lp += cw; 94 wcval->vals[0] = lp->ch; 95 wcval->attributes = lp->attr; 96 wcval->elements = 1; 97 np = lp->nsp; 98 if (np) { 99 do { 100 wcval->vals[wcval->elements++] = np->ch; 101 np = np-> next; 102 } while (np); 103 } 104 105 return OK; 106 } 107