janwas
d0acaecc5c
fix warnings in self tests make win_pre_main_init manually callable and remove the main() hook (see rationale at decl of win_pre_main_init) This was SVN commit r3981.
79 lines
2.8 KiB
C
79 lines
2.8 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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#include "lib/config.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 <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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// rationale for manual init:
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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.
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// one possibility is using WinMain as the entry point, and then calling the
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// application's main(), but this is expressly forbidden by the C standard.
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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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//
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// another alternative is re#defining the app's main function to app_main,
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// having the OS call our main, and then dispatching to app_main.
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// however, this leads to trouble when another library (e.g. SDL) wants to
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// do the same.
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//
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// moreover, this file is compiled into a static library and used both for
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// the 0ad executable as well as the separate self-test. this means
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// we can't enable the main() hook for one and disable in the other.
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//
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// the consequence is that automatic init isn't viable. users MUST call this
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// at the beginning of main (or at least before using any lib function).
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// this is unfortunate because integration into new projects requires
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// remembering to call the init function, but it can't be helped.
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extern void win_pre_main_init();
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#endif // #ifndef WIN_H__
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