lib_data.c revision 50276 
1/****************************************************************************
2 * Copyright (c) 1998,1999 Free Software Foundation, Inc.                   *
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28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 ****************************************************************************/
33
34/*
35**	lib_data.c
36**
37**	Common data that may/may not be allocated, but is referenced globally
38**
39*/
40
41#include <curses.priv.h>
42
43MODULE_ID("$Id: lib_data.c,v 1.14 1999/01/31 01:34:33 Ilya.Zakharevich Exp $")
44
45/*
46 * OS/2's native linker complains if we don't initialize public data when
47 * constructing a dll (reported by J.J.G.Ripoll).
48 */
49WINDOW *stdscr = 0;
50WINDOW *curscr = 0;
51WINDOW *newscr = 0;
52
53SCREEN *_nc_screen_chain = 0;
54
55/*
56 * The variable 'SP' will be defined as a function on systems that cannot link
57 * data-only modules, since it is used in a lot of places within ncurses and we
58 * cannot guarantee that any application will use any particular function.  We
59 * put the WINDOW variables in this module, because it appears that any
60 * application that uses them will also use 'SP'.
61 *
62 * This module intentionally does not reference other ncurses modules, to avoid
63 * module coupling that increases the size of the executable.
64 */
65#if BROKEN_LINKER
66static	SCREEN *my_screen;
67
68SCREEN *_nc_screen(void)
69{
70	return my_screen;
71}
72
73int _nc_alloc_screen(void)
74{
75	return ((my_screen = typeCalloc(SCREEN, 1)) != 0);
76}
77
78void _nc_set_screen(SCREEN *sp)
79{
80	my_screen = sp;
81}
82#else
83SCREEN *SP = NULL;		/* Some linkers require initialized data... */
84#endif
85