Home | History | Annotate | Line # | Download | only in libcurses
in_wch.c revision 1.4 
      1 /*   $NetBSD: in_wch.c,v 1.4 2017/01/06 13:53:18 roy 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 (at) arl.wustl.edu,ruibiao (at) 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 1.4 2017/01/06 13:53:18 roy 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 #ifndef HAVE_WCHAR
     53 	return ERR;
     54 #else
     55 	return win_wch(stdscr, wcval);
     56 #endif /* HAVE_WCHAR */
     57 }
     58 
     59 /*
     60  * mvin_wch --
     61  *  Return wide character at position (y, x) from stdscr.
     62  */
     63 int
     64 mvin_wch(int y, int x, cchar_t *wcval)
     65 {
     66 #ifndef HAVE_WCHAR
     67 	return ERR;
     68 #else
     69 	return mvwin_wch(stdscr, y, x, wcval);
     70 #endif /* HAVE_WCHAR */
     71 }
     72 
     73 /*
     74  * mvwin_wch --
     75  *  Return wide character at position (y, x) from the given window.
     76  */
     77 int
     78 mvwin_wch(WINDOW *win, int y, int x, cchar_t *wcval)
     79 {
     80 #ifndef HAVE_WCHAR
     81 	return ERR;
     82 #else
     83 	if (wmove(win, y, x) == ERR)
     84 		return ERR;
     85 
     86 	return win_wch(win, wcval);
     87 #endif /* HAVE_WCHAR */
     88 }
     89 
     90 /*
     91  * win_wch --
     92  *	Return wide character at cursor position.
     93  */
     94 int
     95 win_wch(WINDOW *win, cchar_t *wcval)
     96 {
     97 #ifndef HAVE_WCHAR
     98 	return ERR;
     99 #else
    100 	nschar_t *np;
    101 	__LDATA *lp = &win->alines[win->cury]->line[win->curx];
    102 	int cw = WCOL(*lp);
    103 
    104 	if (cw < 0)
    105 		lp += cw;
    106 	wcval->vals[0] = lp->ch;
    107 	wcval->attributes = lp->attr;
    108 	wcval->elements = 1;
    109 	np = lp->nsp;
    110 	if (np) {
    111 		do {
    112 			wcval->vals[wcval->elements++] = np->ch;
    113 			np = np-> next;
    114 		} while (np);
    115 	}
    116 
    117 	return OK;
    118 #endif /* HAVE_WCHAR */
    119 }
    120