libcurses/screen/getwin.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1988 AT&T */
/*    All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*LINTLIBRARY*/

#include    <sys/types.h>
#include    "curses_inc.h"

#define     SEPARATE_READ   6

/* Read a window that was stored by putwin. */

WINDOW  *
getwin(FILE *filep)
{
    short       *save_fch, win_nums[SEPARATE_READ], maxy, maxx, nelt;
    WINDOW      *win = NULL;
    chtype      **ecp, **wcp;

    /* read everything from _cury to _bkgd inclusive */

    nelt = sizeof (WINDOW) - sizeof (win->_y) - sizeof (win->_parent) -
        sizeof (win->_parx) - sizeof (win->_pary) -
        sizeof (win->_ndescs) - sizeof (win->_delay) -
        (SEPARATE_READ * sizeof (short));

    if ((fread((char *) win_nums, sizeof (short), SEPARATE_READ, filep) !=
        SEPARATE_READ) || ((win = _makenew(maxy = win_nums[2], maxx =
        win_nums[3], win_nums[4], win_nums[5])) == NULL)) {
        goto err;
    }

    if (_image(win) == ERR) {
        win = (WINDOW *) NULL;
        goto err;
    }
    save_fch = win->_firstch;

    if (fread(&(win->_flags), 1, nelt, filep) != nelt)
        goto err;

    win->_firstch = save_fch;
    win->_lastch = save_fch + maxy;

    /* read the image */
    wcp = win->_y;
    ecp = wcp + maxy;

    while (wcp < ecp)
        if (fread((char *) *wcp++, sizeof (chtype), maxx, filep) !=
            maxx) {
err :
            if (win != NULL)
                (void) delwin(win);
            return ((WINDOW *) NULL);
    }

    win->_cury = win_nums[0];
    win->_curx = win_nums[1];
    win->_use_idl = win->_use_keypad = FALSE;

    return (win);
}