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check whether unicows.dll works correctly instead of just crashing if we linked it in wrong order (i.e. not before wx libs)

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35236 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2005-08-19 17:10:24 +00:00
parent 69c54afe21
commit 6f2df739f4
1 changed files with 81 additions and 36 deletions
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117
src/msw/main.cpp
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@@ -253,6 +253,84 @@ int wxEntry(int& argc, wxChar **argv)
#if wxUSE_GUI && defined(__WXMSW__)
#if wxUSE_UNICODE && !defined(__WXWINCE__)
#define NEED_UNICODE_CHECK
#endif
#ifdef NEED_UNICODE_CHECK
// check whether Unicode is available
static bool wxIsUnicodeAvailable()
{
static const wchar_t *ERROR_STRING = L"wxWidgets Fatal Error";
if ( wxGetOsVersion() != wxWINDOWS_NT )
{
// we need to be built with MSLU support
#if !wxUSE_UNICODE_MSLU
// note that we can use MessageBoxW() as it's implemented even under
// Win9x - OTOH, we can't use wxGetTranslation() because the file APIs
// used by wxLocale are not
::MessageBox
(
NULL,
L"This program uses Unicode and requires Windows NT/2000/XP.\n"
L"\n"
L"Program aborted.",
ERROR_STRING,
MB_ICONERROR | MB_OK
);
return false;
#endif // !wxUSE_UNICODE_MSLU
// and the MSLU DLL must also be available
HMODULE hmod = ::LoadLibraryA("unicows.dll");
if ( !hmod )
{
::MessageBox
(
NULL,
L"This program uses Unicode and requires unicows.dll to work "
L"under current operating system.\n"
L"\n"
L"Please install unicows.dll and relaunch the program.",
ERROR_STRING,
MB_ICONERROR | MB_OK
);
return false;
}
// this is not really necessary but be tidy
::FreeLibrary(hmod);
// finally do the last check: has unicows.lib initialized correctly?
hmod = ::LoadLibraryW(L"unicows.dll");
if ( !hmod )
{
::MessageBox
(
NULL,
L"This program uses Unicode but is not using unicows.dll\n"
L"correctly and so cannot work under current operating system.\n"
L"Please contact the program author for an updated version.\n"
L"\n"
L"Program aborted.",
ERROR_STRING,
MB_ICONERROR | MB_OK
);
return false;
}
::FreeLibrary(hmod);
}
return true;
}
#endif // NEED_UNICODE_CHECK
// ----------------------------------------------------------------------------
// Windows-specific wxEntry
// ----------------------------------------------------------------------------
@@ -265,43 +343,10 @@ WXDLLEXPORT int wxEntry(HINSTANCE hInstance,
// the first thing to do is to check if we're trying to run an Unicode
// program under Win9x w/o MSLU emulation layer - if so, abort right now
// as it has no chance to work and has all chances to crash
#if wxUSE_UNICODE && !defined(__WXWINCE__)
if ( wxGetOsVersion() != wxWINDOWS_NT )
{
// we need to be built with MSLU support
#if !wxUSE_UNICODE_MSLU
// note that we can use MessageBoxW() as it's implemented even under
// Win9x - OTOH, we can't use wxGetTranslation() because the file APIs
// used by wxLocale are not
::MessageBox
(
NULL,
_T("This program uses Unicode and requires Windows NT/2000/XP.\n\nProgram aborted."),
_T("wxWidgets Fatal Error"),
MB_ICONERROR | MB_OK
);
#ifdef NEED_UNICODE_CHECK
if ( !wxIsUnicodeAvailable() )
return -1;
#endif // !wxUSE_UNICODE_MSLU
// and the MSLU DLL must also be available
HMODULE hmod = ::LoadLibraryA("unicows.dll");
if ( !hmod )
{
::MessageBox
(
NULL,
_T("This program uses Unicode and requires unicows.dll to work under current operating system.\n\nPlease install unicows.dll and relaunch the program."),
_T("wxWidgets Fatal Error"),
MB_ICONERROR | MB_OK
);
return -1;
}
// this is not really necessary but be tidy
::FreeLibrary(hmod);
}
#endif // wxUSE_UNICODE && !wxUSE_UNICODE_MSLU
#endif // NEED_UNICODE_CHECK
// remember the parameters Windows gave us