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 /*
23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved	*/
29 
30 /*
31  * University Copyright- Copyright (c) 1982, 1986, 1988
32  * The Regents of the University of California
33  * All Rights Reserved
34  *
35  * University Acknowledgment- Portions of this document are derived from
36  * software developed by the University of California, Berkeley, and its
37  * contributors.
38  */
39 
40 /*LINTLIBRARY*/
41 
42 #include	<sys/types.h>
43 #include	"curses_inc.h"
44 
45 /*
46  * Read in ncols worth of data from window win and assign the
47  * chars to string. NULL terminate string upon completion.
48  * Return the number of chtypes copied.
49  */
50 
51 int
52 winchnstr(WINDOW *win, chtype *string, int ncols)
53 {
54 	chtype	*ptr = &(win->_y[win->_cury][win->_curx]);
55 	int	counter = 0;
56 	int	maxcols = win->_maxx - win->_curx;
57 	int	eucw, scrw, s;
58 	chtype	rawc, attr, wc;
59 
60 	if (ncols < 0)
61 		ncols = MAXINT;
62 
63 	while (ISCBIT(*ptr)) {
64 		ptr--;
65 		maxcols++;
66 	}
67 
68 	while ((counter < ncols) && maxcols > 0) {
69 		eucw = mbeucw((int) RBYTE(*ptr));
70 		scrw = mbscrw((int) RBYTE(*ptr));
71 
72 		if (counter + eucw > ncols)
73 			break;
74 		for (s = 0; s < scrw; s++, maxcols--, ptr++) {
75 			attr = _ATTR(*ptr);
76 			rawc = _CHAR(*ptr);
77 			if ((wc = RBYTE(rawc)) == MBIT)
78 				continue;
79 			*string++ = wc | attr;
80 			counter++;
81 			if ((wc = LBYTE(rawc) | MBIT) == MBIT)
82 				continue;
83 			*string++ = wc | attr;
84 			counter++;
85 		}
86 	}
87 	if (counter < ncols)
88 		*string = (chtype) 0;
89 	return (counter);
90 }
91