lib_data.c revision 76726 
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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 1.16 2000/12/10 02:55:07 tom 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 */
49NCURSES_EXPORT_VAR(WINDOW *)
50stdscr = 0;
51NCURSES_EXPORT_VAR(WINDOW *)
52curscr = 0;
53NCURSES_EXPORT_VAR(WINDOW *)
54newscr = 0;
55
56NCURSES_EXPORT_VAR(SCREEN *) _nc_screen_chain = 0;
57
58/*
59 * The variable 'SP' will be defined as a function on systems that cannot link
60 * data-only modules, since it is used in a lot of places within ncurses and we
61 * cannot guarantee that any application will use any particular function.  We
62 * put the WINDOW variables in this module, because it appears that any
63 * application that uses them will also use 'SP'.
64 *
65 * This module intentionally does not reference other ncurses modules, to avoid
66 * module coupling that increases the size of the executable.
67 */
68#if BROKEN_LINKER
69     static SCREEN *my_screen;
70
71NCURSES_EXPORT(SCREEN *)
72_nc_screen(void)
73{
74    return my_screen;
75}
76
77NCURSES_EXPORT(int)
78_nc_alloc_screen(void)
79{
80    return ((my_screen = typeCalloc(SCREEN, 1)) != 0);
81}
82
83NCURSES_EXPORT(void)
84_nc_set_screen(SCREEN * sp)
85{
86    my_screen = sp;
87}
88
89#else
90NCURSES_EXPORT_VAR(SCREEN *) SP = NULL;		/* Some linkers require initialized data... */
91#endif
92