1 /* $NetBSD: in_wchstr.c,v 1.11 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_wchstr.c,v 1.11 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_wchstr, in_wchnstr -- 47 * Return an array of wide characters at cursor position from stdscr. 48 */ 49 __warn_references(in_wchstr, 50 "warning: this program uses in_wchstr(), which is unsafe.") 51 int 52 in_wchstr(cchar_t *wchstr) 53 { 54 return win_wchstr(stdscr, wchstr); 55 } 56 57 int 58 in_wchnstr(cchar_t *wchstr, int n) 59 { 60 return win_wchnstr(stdscr, wchstr, n); 61 } 62 63 /* 64 * mvin_wchstr, mv_winchnstr -- 65 * Return an array of wide characters at position (y, x) from stdscr. 66 */ 67 __warn_references(mvin_wchstr, 68 "warning: this program uses mvin_wchstr(), which is unsafe.") 69 int 70 mvin_wchstr(int y, int x, cchar_t *wchstr) 71 { 72 return mvwin_wchstr(stdscr, y, x, wchstr); 73 } 74 75 int 76 mvin_wchnstr(int y, int x, cchar_t *wchstr, int n) 77 { 78 return mvwin_wchnstr(stdscr, y, x, wchstr, n); 79 } 80 81 /* 82 * mvwin_wchstr, mvwin_wchnstr -- 83 * Return an array wide characters at position (y, x) from the given window. 84 */ 85 __warn_references(mvwin_wchstr, 86 "warning: this program uses mvwin_wchstr(), which is unsafe.") 87 int 88 mvwin_wchstr(WINDOW *win, int y, int x, cchar_t *wchstr) 89 { 90 if (wmove(win, y, x) == ERR) 91 return ERR; 92 93 return win_wchstr(win, wchstr); 94 } 95 96 int 97 mvwin_wchnstr(WINDOW *win, int y, int x, cchar_t *wchstr, int n) 98 { 99 if (wmove(win, y, x) == ERR) 100 return ERR; 101 102 return win_wchnstr(win, wchstr, n); 103 } 104 105 /* 106 * win_wchstr, win_wchnstr -- 107 * Return an array of characters at cursor position. 108 */ 109 __warn_references(win_wchstr, 110 "warning: this program uses win_wchstr(), which is unsafe.") 111 int 112 win_wchstr(WINDOW *win, cchar_t *wchstr) 113 { 114 115 return win_wchnstr(win, wchstr, -1); 116 } 117 118 /* 119 * - SUSv2/xcurses doesn't document whether the trailing 0 is included 120 * in the length count or not. For safety's sake it _is_ included. 121 */ 122 int 123 win_wchnstr(WINDOW *win, cchar_t *wchstr, int n) 124 { 125 __LDATA *start; 126 int x = 0, cw = 0, cnt = 0; 127 cchar_t *wcp; 128 nschar_t *np; 129 130 if (__predict_false(win == NULL)) 131 return ERR; 132 133 if (wchstr == NULL) 134 return ERR; 135 136 start = &win->alines[win->cury]->line[win->curx]; 137 x = win->curx; 138 cw = start->wcols; 139 if (cw < 0) { 140 start += cw; 141 x += cw; 142 } 143 wcp = wchstr; 144 /* (n - 1) to leave room for the trailing 0 element */ 145 while ((x < win->maxx) && ((n < 0) || ((n > 1) && (cnt < n - 1)))) { 146 cw = start->wcols; 147 wcp->vals[0] = start->ch; 148 wcp->attributes = start->attr; 149 wcp->elements = 1; 150 np = start->nsp; 151 if (np) { 152 do { 153 wcp->vals[wcp->elements++] = np->ch; 154 np = np->next; 155 } while (np); 156 } 157 wcp++; 158 cnt++; 159 x += cw; 160 if (x < win->maxx) 161 start += cw; 162 } 163 wcp->vals[0] = L'\0'; 164 wcp->elements = 1; 165 wcp->attributes = win->wattr; 166 167 return OK; 168 } 169