forked from 0ad/0ad
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/**
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* =========================================================================
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* File : win.h
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* Project : 0 A.D.
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* Description : various compatibility fixes for Win32.
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*
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* @author Jan.Wassenberg@stud.uni-karlsruhe.de
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* =========================================================================
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*/
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/*
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* Copyright (c) 2003-2004 Jan Wassenberg
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*
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* Redistribution and/or modification are also permitted under the
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* terms of the GNU General Public License as published by the
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* Free Software Foundation (version 2 or later, at your option).
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef WIN_H__
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#define WIN_H__
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#if !OS_WIN
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#error "win.h: do not include if not compiling for Windows"
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#endif
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#include "lib/config.h"
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#include <wchar.h>
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// provide C99 *snprintf functions if compiler doesn't already
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// (MinGW does, VC7.1 doesn't).
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#if !HAVE_C99
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# define snprintf _snprintf
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# define swprintf _snwprintf
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# define vsnprintf _vsnprintf
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# define vsnwprintf _vsnwprintf
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#endif
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#include <stddef.h> // wchar_t
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// libpng.h -> zlib.h -> zconf.h includes <windows.h>, which causes conflicts.
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// prevent that, and define what they actually need from windows.h.
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// incidentally, this requires all dependents of windows.h to include
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// sysdep/win/win_internal.h instead.
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#define _WINDOWS_ // windows.h include guard
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#define WINAPI __stdcall
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#define WINAPIV __cdecl
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//
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// main() hook
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//
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// our Windows-specific init code needs to run before the regular main() code.
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// ideally this would happen automagically, but there are two problems:
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// - the C standard expressly forbids calling main() directly;
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// VC apparently makes use of this and changes its calling convention.
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// if we call it, everything appears to work but stack traces in
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// release mode are incorrect (symbol address is off by 4).
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// - other libraries may also want to hook main(); in that case,
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// "one must fall". we need to provide for disabling our hook.
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// this is not enough reason to forego a hook entirely -
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// integration into new projects is easier when there is less
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// stuff to remember (here, calling our init function directly).
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//
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// what we'll do is: redefine the app's main function to app_main, have the
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// OS call our main, and call app_main from there. in case another library
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// (e.g. SDL) has the same idea, #define NO_MAIN_REDIRECT prevents the
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// above; you then need to call win_pre_main_init at the beginning of main().
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//#define NO_MAIN_REDIRECT
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#ifdef NO_MAIN_REDIRECT
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extern void win_pre_main_init();
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#else
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#define main app_main
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#endif
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#endif // #ifndef WIN_H__
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