1 /****************************************************************************
2 * Copyright (c) 1998-2005,2007 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
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8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 1996-on *
33 ****************************************************************************/
38 ** Common data that may/may not be allocated, but is referenced globally
42 #include <curses.priv.h>
44 MODULE_ID("$Id: lib_data.c,v 1.19 2007/03/10 19:31:27 tom Exp $")
47 * OS/2's native linker complains if we don't initialize public data when
48 * constructing a dll (reported by J.J.G.Ripoll).
51 NCURSES_EXPORT(WINDOW *)
52 NCURSES_PUBLIC_VAR(stdscr) (void)
54 return SP ? SP->_stdscr : 0;
56 NCURSES_EXPORT(WINDOW *)
57 NCURSES_PUBLIC_VAR(curscr) (void)
59 return SP ? SP->_curscr : 0;
61 NCURSES_EXPORT(WINDOW *)
62 NCURSES_PUBLIC_VAR(newscr) (void)
64 return SP ? SP->_newscr : 0;
67 NCURSES_EXPORT_VAR(WINDOW *) stdscr = 0;
68 NCURSES_EXPORT_VAR(WINDOW *) curscr = 0;
69 NCURSES_EXPORT_VAR(WINDOW *) newscr = 0;
72 NCURSES_EXPORT_VAR(SCREEN *) _nc_screen_chain = 0;
75 * The variable 'SP' will be defined as a function on systems that cannot link
76 * data-only modules, since it is used in a lot of places within ncurses and we
77 * cannot guarantee that any application will use any particular function. We
78 * put the WINDOW variables in this module, because it appears that any
79 * application that uses them will also use 'SP'.
81 * This module intentionally does not reference other ncurses modules, to avoid
82 * module coupling that increases the size of the executable.
85 static SCREEN *my_screen;
87 NCURSES_EXPORT(SCREEN *)
94 _nc_alloc_screen(void)
96 return ((my_screen = typeCalloc(SCREEN, 1)) != 0);
100 _nc_set_screen(SCREEN *sp)
106 NCURSES_EXPORT_VAR(SCREEN *) SP = NULL; /* Some linkers require initialized data... */