1/**************************************************************************** 2 * Copyright (c) 1998-2000,2005 Free Software Foundation, Inc. * 3 * * 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 * 7 * without limitation the rights to use, copy, modify, merge, publish, * 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: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 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, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 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 ****************************************************************************/ 34 35/* 36** lib_data.c 37** 38** Common data that may/may not be allocated, but is referenced globally 39** 40*/ 41 42#include <curses.priv.h> 43 44MODULE_ID("$Id: lib_data.c,v 1.17 2005/01/22 17:39:22 tom Exp $") 45 46/* 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). 49 */ 50NCURSES_EXPORT_VAR(WINDOW *) stdscr = 0; 51NCURSES_EXPORT_VAR(WINDOW *) curscr = 0; 52NCURSES_EXPORT_VAR(WINDOW *) newscr = 0; 53 54NCURSES_EXPORT_VAR(SCREEN *) _nc_screen_chain = 0; 55 56/* 57 * The variable 'SP' will be defined as a function on systems that cannot link 58 * data-only modules, since it is used in a lot of places within ncurses and we 59 * cannot guarantee that any application will use any particular function. We 60 * put the WINDOW variables in this module, because it appears that any 61 * application that uses them will also use 'SP'. 62 * 63 * This module intentionally does not reference other ncurses modules, to avoid 64 * module coupling that increases the size of the executable. 65 */ 66#if BROKEN_LINKER 67static SCREEN *my_screen; 68 69NCURSES_EXPORT(SCREEN *) 70_nc_screen(void) 71{ 72 return my_screen; 73} 74 75NCURSES_EXPORT(int) 76_nc_alloc_screen(void) 77{ 78 return ((my_screen = typeCalloc(SCREEN, 1)) != 0); 79} 80 81NCURSES_EXPORT(void) 82_nc_set_screen(SCREEN *sp) 83{ 84 my_screen = sp; 85} 86 87#else 88NCURSES_EXPORT_VAR(SCREEN *) SP = NULL; /* Some linkers require initialized data... */ 89#endif 90