usr/src/lib/libcurses/screen/getsyx.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 /*
  48  * Get the current screen coordinates (y, x).
  49  *
  50  * The current screen coordinates are defined as the last place that
  51  * the cursor was placed by a wnoutrefresh(), pnoutrefresh() or setsyx()
  52  * call. If leaveok() was true for the last window refreshed, then
  53  * return (-1, -1) so that setsyx() can reset the leaveok flag.
  54  *
  55  * This function is actually called by the macro getsyx(y, x), which is
  56  * defined in curses.h as:
  57  *
  58  * #define getsyx(y, x) _getsyx(&y, &x)
  59  *
  60  * Note that this macro just adds in the '&'. In this way, getsyx()
  61  * is parallel with the other getyx() routines which don't require
  62  * ampersands. The reason that this can't all be a macro is that
  63  * that we need to access SP, which is normally not available in
  64  * user-level routines.
  65  */
  66
  67 int
  68 _getsyx(int *yp, int *xp)
  69 {
  70         if (SP->virt_scr->_leave)
  71                 *yp = *xp = -1;
  72         else {
  73                 *yp = _virtscr->_cury - SP->Yabove;
  74                 *xp = _virtscr->_curx;
  75         }
  76         return (OK);
  77 }