xref: /illumos-gate/usr/src/lib/libcurses/screen/mbcharlen.c (revision 1da57d551424de5a9d469760be7c4b4d4f10a755)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*  Copyright (c) 1988 AT&T */
23 /*    All Rights Reserved   */
24 
25 
26 /*
27  *      Copyright (c) 1997, by Sun Microsystems, Inc.
28  *      All rights reserved.
29  */
30 
31 /*LINTLIBRARY*/
32 
33 #include	<sys/types.h>
34 #include	"curses_inc.h"
35 
36 /*
37  *	Get the # of valid characters
38  */
39 
40 int
mbcharlen(char * sp)41 mbcharlen(char *sp)
42 {
43 	int		n, m, k, ty;
44 	chtype	c;
45 
46 	n = 0;
47 	for (; *sp != '\0'; ++sp, ++n)
48 		if (ISMBIT(*sp)) {
49 			c = RBYTE(*sp);
50 			ty = TYPE(c & 0377);
51 			m  = cswidth[ty] - (ty == 0 ? 1 : 0);
52 			for (sp += 1, k = 1; *sp != '\0' && k <= m; ++k,
53 			    ++sp) {
54 				c = RBYTE(*sp);
55 				if (TYPE(c) != 0)
56 					break;
57 			}
58 			if (k <= m)
59 				break;
60 		}
61 	return (n);
62 }
63