xref: /titanic_41/usr/src/lib/libcurses/screen/mbdisplen.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
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 #pragma ident	"%Z%%M%	%I%	%E% SMI"
32 
33 /*LINTLIBRARY*/
34 
35 #include	<sys/types.h>
36 #include	"curses_inc.h"
37 
38 /*
39  *	Get the display length of a string.
40  */
41 
42 int
mbdisplen(char * sp)43 mbdisplen(char *sp)
44 {
45 	int		n, m, k, ty;
46 	chtype	c;
47 
48 	n = 0;
49 	for (; *sp != '\0'; ++sp) {
50 		if (!ISMBIT(*sp))
51 			++n;
52 		else {
53 			c = RBYTE(*sp);
54 			ty = TYPE(c & 0377);
55 			m  = cswidth[ty] - (ty == 0 ? 1 : 0);
56 			for (sp += 1, k = 1; *sp != '\0' && k <= m;
57 			    ++k, ++sp) {
58 				c = RBYTE(*sp);
59 				if (TYPE(c) != 0)
60 					break;
61 			}
62 			if (k <= m)
63 				break;
64 			n += _curs_scrwidth[ty];
65 		}
66 	}
67 	return (n);
68 }
69