xref: /onnv-gate/usr/src/lib/libcurses/screen/mbcharlen.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*  Copyright (c) 1988 AT&T */
23*0Sstevel@tonic-gate /*    All Rights Reserved   */
24*0Sstevel@tonic-gate 
25*0Sstevel@tonic-gate 
26*0Sstevel@tonic-gate /*
27*0Sstevel@tonic-gate  *      Copyright (c) 1997, by Sun Microsystems, Inc.
28*0Sstevel@tonic-gate  *      All rights reserved.
29*0Sstevel@tonic-gate  */
30*0Sstevel@tonic-gate 
31*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
32*0Sstevel@tonic-gate 
33*0Sstevel@tonic-gate /*LINTLIBRARY*/
34*0Sstevel@tonic-gate 
35*0Sstevel@tonic-gate #include	<sys/types.h>
36*0Sstevel@tonic-gate #include	"curses_inc.h"
37*0Sstevel@tonic-gate 
38*0Sstevel@tonic-gate /*
39*0Sstevel@tonic-gate  *	Get the # of valid characters
40*0Sstevel@tonic-gate  */
41*0Sstevel@tonic-gate 
42*0Sstevel@tonic-gate int
mbcharlen(char * sp)43*0Sstevel@tonic-gate mbcharlen(char *sp)
44*0Sstevel@tonic-gate {
45*0Sstevel@tonic-gate 	int		n, m, k, ty;
46*0Sstevel@tonic-gate 	chtype	c;
47*0Sstevel@tonic-gate 
48*0Sstevel@tonic-gate 	n = 0;
49*0Sstevel@tonic-gate 	for (; *sp != '\0'; ++sp, ++n)
50*0Sstevel@tonic-gate 		if (ISMBIT(*sp)) {
51*0Sstevel@tonic-gate 			c = RBYTE(*sp);
52*0Sstevel@tonic-gate 			ty = TYPE(c & 0377);
53*0Sstevel@tonic-gate 			m  = cswidth[ty] - (ty == 0 ? 1 : 0);
54*0Sstevel@tonic-gate 			for (sp += 1, k = 1; *sp != '\0' && k <= m; ++k,
55*0Sstevel@tonic-gate 			    ++sp) {
56*0Sstevel@tonic-gate 				c = RBYTE(*sp);
57*0Sstevel@tonic-gate 				if (TYPE(c) != 0)
58*0Sstevel@tonic-gate 					break;
59*0Sstevel@tonic-gate 			}
60*0Sstevel@tonic-gate 			if (k <= m)
61*0Sstevel@tonic-gate 				break;
62*0Sstevel@tonic-gate 		}
63*0Sstevel@tonic-gate 	return (n);
64*0Sstevel@tonic-gate }
65