xref: /illumos-gate/usr/src/lib/libcurses/screen/getwin.c (revision 9890ff8357a674572254e0be06b175a1e8eab4b0)
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 #define		SEPARATE_READ	6
48 
49 /* Read a window that was stored by putwin. */
50 
51 WINDOW	*
52 getwin(FILE *filep)
53 {
54 	short		*save_fch, win_nums[SEPARATE_READ], maxy, maxx, nelt;
55 	WINDOW		*win = NULL;
56 	chtype		**ecp, **wcp;
57 
58 	/* read everything from _cury to _bkgd inclusive */
59 
60 	nelt = sizeof (WINDOW) - sizeof (win->_y) - sizeof (win->_parent) -
61 	    sizeof (win->_parx) - sizeof (win->_pary) -
62 	    sizeof (win->_ndescs) - sizeof (win->_delay) -
63 	    (SEPARATE_READ * sizeof (short));
64 
65 	if ((fread((char *) win_nums, sizeof (short), SEPARATE_READ, filep) !=
66 	    SEPARATE_READ) || ((win = _makenew(maxy = win_nums[2], maxx =
67 	    win_nums[3], win_nums[4], win_nums[5])) == NULL)) {
68 		goto err;
69 	}
70 
71 	if (_image(win) == ERR) {
72 		win = (WINDOW *) NULL;
73 		goto err;
74 	}
75 	save_fch = win->_firstch;
76 
77 	if (fread(&(win->_flags), 1, nelt, filep) != nelt)
78 		goto err;
79 
80 	win->_firstch = save_fch;
81 	win->_lastch = save_fch + maxy;
82 
83 	/* read the image */
84 	wcp = win->_y;
85 	ecp = wcp + maxy;
86 
87 	while (wcp < ecp)
88 		if (fread((char *) *wcp++, sizeof (chtype), maxx, filep) !=
89 		    maxx) {
90 err :
91 			if (win != NULL)
92 				(void) delwin(win);
93 			return ((WINDOW *) NULL);
94 	}
95 
96 	win->_cury = win_nums[0];
97 	win->_curx = win_nums[1];
98 	win->_use_idl = win->_use_keypad = FALSE;
99 
100 	return (win);
101 }
102