xref: /titanic_51/usr/src/lib/libcurses/screen/winnwstr.c (revision bbaa8b60dd95d714741fc474adad3cf710ef4efd)
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  * Copy n chars(wchar_t) in window win from current cursor position to end
40  * of window into char buffer str.  Return the number of chars copied.
41  */
42 
43 int
44 winnwstr(WINDOW *win, wchar_t *wstr, int ncols)
45 {
46 	int	counter = 0;
47 	int	cy = win->_cury;
48 	chtype	*ptr = &(win->_y[cy][win->_curx]),
49 		*pmax = &(win->_y[cy][win->_maxx]);
50 	wchar_t	wc, *cp;
51 	int	scrw, s;
52 	char	cbuf[CSMAX+1];
53 
54 
55 	while (ISCBIT(*ptr))
56 		ptr--;
57 
58 	if (ncols < -1)
59 		ncols = MAXINT;
60 
61 	while (counter < ncols) {
62 		wc = RBYTE(*ptr);
63 		scrw = mbscrw((int) wc);
64 		(void) mbeucw((int) wc);
65 		/* LINTED */
66 		cp = (wchar_t *)cbuf;
67 		for (s = 0; s < scrw; s++, ptr++) {
68 			if ((wc = RBYTE(*ptr)) == MBIT)
69 				continue;
70 			*cp++ = wc;
71 			if ((wc = LBYTE(*ptr) | MBIT) == MBIT)
72 				continue;
73 			*cp++ = wc;
74 		}
75 		*cp = (char)0;
76 
77 		if (_curs_mbtowc(&wc, cbuf, CSMAX) <= 0)
78 			break;
79 
80 		*wstr++ = wc;
81 		counter++;
82 
83 		if (ptr >= pmax) {
84 			if (++cy == win->_maxy)
85 				break;
86 
87 			ptr = &(win->_y[cy][0]);
88 			pmax = ptr + win->_maxx;
89 		}
90 	}
91 	if (counter < ncols)
92 		*wstr = (wchar_t)0;
93 
94 	return (counter);
95 }
96