xref: /titanic_50/usr/src/lib/libcurses/screen/winnstr.c (revision c77a61a72b5ecdc507d6cf104142edd371a16c84)
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 #pragma ident	"%Z%%M%	%I%	%E% SMI"
41 
42 /*LINTLIBRARY*/
43 
44 #include	<sys/types.h>
45 #include	"curses_inc.h"
46 
47 /*
48  * Copy n chars in window win from current cursor position to end
49  * of window into char buffer str.  Return the number of chars copied.
50  */
51 
52 int
53 winnstr(WINDOW *win, char *str, int ncols)
54 {
55 	int	counter = 0;
56 	int	cy = win->_cury;
57 	chtype	*ptr = &(win->_y[cy][win->_curx]),
58 		*pmax = &(win->_y[cy][win->_maxx]);
59 	chtype	wc;
60 	int	eucw, scrw, s;
61 
62 
63 	while (ISCBIT(*ptr))
64 		ptr--;
65 
66 	if (ncols < -1)
67 		ncols = MAXINT;
68 
69 	while (counter < ncols) {
70 		scrw = mbscrw((int) RBYTE(*ptr));
71 		eucw = mbeucw((int) RBYTE(*ptr));
72 		if (counter + eucw > ncols)
73 			break;
74 
75 		for (s = 0; s < scrw; s++, ptr++) {
76 			if ((wc = RBYTE(*ptr)) == MBIT)
77 				continue;
78 			/* LINTED */
79 			*str++ = (char) wc;
80 			counter++;
81 			if ((wc = LBYTE(*ptr) | MBIT) == MBIT)
82 				continue;
83 			/* LINTED */
84 			*str++ = (char) wc;
85 			counter++;
86 		}
87 
88 		if (ptr >= pmax) {
89 			if (++cy == win->_maxy)
90 				break;
91 
92 			ptr = &(win->_y[cy][0]);
93 			pmax = ptr + win->_maxx;
94 		}
95 	}
96 	if (counter < ncols)
97 		*str = '\0';
98 
99 	return (counter);
100 }
101