lib/libcurses/in_wch.c

   1 /*   $NetBSD: in_wch.c,v 1.3 2009/07/22 16:57:14 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@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 1.3 2009/07/22 16:57:14 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 }