usr/src/lib/libcurses/screen/getwin.c

   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 }