xref: /illumos-gate/usr/src/lib/libcurses/screen/waddchnstr.c (revision 7a6d80f1660abd4755c68cbd094d4a914681d26e)
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  * Add ncols worth of data to win, using string as input.
47  * Return the number of chtypes copied.
48  */
49 int
50 waddchnstr(WINDOW *win, chtype *string, int ncols)
51 {
52 	short		my_x = win->_curx;
53 	short		my_y = win->_cury;
54 	int		remcols;
55 	int		b;
56 	int		sw;
57 	int		ew;
58 
59 	if (ncols < 0) {
60 		remcols = win->_maxx - my_x;
61 		while (*string && remcols) {
62 			sw = mbscrw((int)(_CHAR(*string)));
63 			ew = mbeucw((int)(_CHAR(*string)));
64 			if (remcols < sw)
65 				break;
66 			for (b = 0; b < ew; b++) {
67 				if (waddch(win, *string++) == ERR)
68 					goto out;
69 			}
70 			remcols -= sw;
71 		}
72 	} else {
73 		remcols = win->_maxx - my_x;
74 		while ((*string) && (remcols > 0) && (ncols > 0)) {
75 			sw = mbscrw((int)(_CHAR(*string)));
76 			ew = mbeucw((int)(_CHAR(*string)));
77 			if ((remcols < sw) || (ncols < ew))
78 				break;
79 			for (b = 0; b < ew; b++) {
80 				if (waddch(win, *string++) == ERR)
81 					goto out;
82 			}
83 			remcols -= sw;
84 			ncols -= ew;
85 		}
86 	}
87 out:
88 	/* restore cursor position */
89 	win->_curx = my_x;
90 	win->_cury = my_y;
91 
92 	win->_flags |= _WINCHANGED;
93 
94 	/* sync with ancestor structures */
95 	if (win->_sync)
96 		wsyncup(win);
97 
98 	return (win->_immed ? wrefresh(win) : OK);
99 }
100