xref: /illumos-gate/usr/src/lib/libcurses/screen/getwin.c (revision e3ae4b35c024af1196582063ecee3ab79367227d)
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 #define		SEPARATE_READ	6
46 
47 /* Read a window that was stored by putwin. */
48 
49 WINDOW	*
50 getwin(FILE *filep)
51 {
52 	short		*save_fch, win_nums[SEPARATE_READ], maxy, maxx, nelt;
53 	WINDOW		*win = NULL;
54 	chtype		**ecp, **wcp;
55 
56 	/* read everything from _cury to _bkgd inclusive */
57 
58 	nelt = sizeof (WINDOW) - sizeof (win->_y) - sizeof (win->_parent) -
59 	    sizeof (win->_parx) - sizeof (win->_pary) -
60 	    sizeof (win->_ndescs) - sizeof (win->_delay) -
61 	    (SEPARATE_READ * sizeof (short));
62 
63 	if ((fread((char *) win_nums, sizeof (short), SEPARATE_READ, filep) !=
64 	    SEPARATE_READ) || ((win = _makenew(maxy = win_nums[2], maxx =
65 	    win_nums[3], win_nums[4], win_nums[5])) == NULL)) {
66 		goto err;
67 	}
68 
69 	if (_image(win) == ERR) {
70 		win = (WINDOW *) NULL;
71 		goto err;
72 	}
73 	save_fch = win->_firstch;
74 
75 	if (fread(&(win->_flags), 1, nelt, filep) != nelt)
76 		goto err;
77 
78 	win->_firstch = save_fch;
79 	win->_lastch = save_fch + maxy;
80 
81 	/* read the image */
82 	wcp = win->_y;
83 	ecp = wcp + maxy;
84 
85 	while (wcp < ecp)
86 		if (fread((char *) *wcp++, sizeof (chtype), maxx, filep) !=
87 		    maxx) {
88 err :
89 			if (win != NULL)
90 				(void) delwin(win);
91 			return ((WINDOW *) NULL);
92 	}
93 
94 	win->_cury = win_nums[0];
95 	win->_curx = win_nums[1];
96 	win->_use_idl = win->_use_keypad = FALSE;
97 
98 	return (win);
99 }
100