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cchar.c revision 1.1 
      1 /*   $NetBSD: cchar.c,v 1.1 2007/01/21 11:38:59 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 (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: cchar.c,v 1.1 2007/01/21 11:38:59 blymn Exp $");
     40 #endif						  /* not lint */
     41 
     42 #include <string.h>
     43 
     44 #include "curses.h"
     45 #include "curses_private.h"
     46 
     47 /*
     48  * getcchar --
     49  *	get a wide character string and rendition from a cchar_t
     50  */
     51 int
     52 getcchar(const cchar_t *wcval, wchar_t *wch, attr_t *attrs,
     53 					 short *color_pair, void *opts)
     54 {
     55 #ifndef HAVE_WCHAR
     56 	return ERR;
     57 #else
     58 	wchar_t *wp;
     59 	int len;
     60 
     61 	if ( opts )
     62 		return ERR;
     63 
     64 	len = (wp = wmemchr(wcval->vals, L'\0', CCHARW_MAX))
     65 		? wp - wcval->vals : CCHARW_MAX;
     66 
     67 	if (wch == NULL)
     68 		return len;
     69 	if (attrs == 0 || color_pair == 0)
     70 		return ERR;
     71 	if (len >= 0) {
     72 		*attrs = wcval -> attributes;
     73 		*color_pair = COLOR_PAIR( wcval -> attributes );
     74 		wmemcpy(wch, wcval->vals, (unsigned) len);
     75 		wch[len] = L'\0';
     76 	}
     77 	return OK;
     78 #endif /* HAVE_WCHAR */
     79 }
     80 
     81 /*
     82  * setcchar --
     83  *	set cchar_t from a wide character string and rendition
     84  */
     85 int
     86 setcchar(cchar_t *wcval, const wchar_t *wch, const attr_t attrs,
     87 					 short color_pair, const void *opts)
     88 {
     89 #ifndef HAVE_WCHAR
     90 	return ERR;
     91 #else
     92 	int i;
     93 	int len;
     94 
     95 	if (opts || (len = wcslen(wch)) > CCHARW_MAX
     96 		|| (len > 1 && wcwidth(wch[0]) < 0)) {
     97 		return ERR;
     98 	}
     99 
    100 	/*
    101 	 * If we have a following spacing-character, stop at that point.  We
    102 	 * are only interested in adding non-spacing characters.
    103 	 */
    104 	for (i = 1; i < len; ++i) {
    105 		if (wcwidth(wch[i]) != 0) {
    106 			len = i;
    107 			break;
    108 		}
    109 	}
    110 
    111 	memset(wcval, 0, sizeof(*wcval));
    112 	if (len != 0) {
    113 		wcval -> attributes = attrs | color_pair;
    114 		wcval -> elements = 1;
    115 		memcpy(&wcval->vals, wch, len * sizeof(wchar_t));
    116 	}
    117 
    118 	return OK;
    119 #endif /* HAVE_WCHAR */
    120 }
    121 
    122