X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c0aadc6f40301f99cbdcc345807b808737a492bf..ce7208d49d5ce2ca1dc0b3b83f14f1d04f29c4bf:/src/msw/main.cpp

diff --git a/src/msw/main.cpp b/src/msw/main.cpp
index 15741e3ed7..00728f40fd 100644
--- a/src/msw/main.cpp
+++ b/src/msw/main.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        msw/main.cpp
+// Name:        src/msw/main.cpp
 // Purpose:     WinMain/DllMain
 // Author:      Julian Smart
 // Modified by:
@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -28,19 +24,20 @@
     #pragma hdrstop
 #endif
 
-#include "wx/event.h"
-#include "wx/app.h"
+#ifndef WX_PRECOMP
+    #include "wx/event.h"
+    #include "wx/app.h"
+#endif //WX_PRECOMP
+
 #include "wx/cmdline.h"
+#include "wx/scopeguard.h"
 
 #include "wx/msw/private.h"
+#include "wx/msw/seh.h"
 
 #if wxUSE_ON_FATAL_EXCEPTION
     #include "wx/datetime.h"
     #include "wx/msw/crashrpt.h"
-
-    #ifdef __VISUALC__
-        #include <eh.h>
-    #endif // __VISUALC__
 #endif // wxUSE_ON_FATAL_EXCEPTION
 
 #ifdef __WXWINCE__
@@ -70,7 +67,7 @@ extern int wxEntryReal(int& argc, wxChar **argv);
 
 #if wxUSE_BASE
 
-#ifdef __VISUALC__
+#if wxUSE_ON_FATAL_EXCEPTION && defined(__VISUALC__) && !defined(__WXWINCE__)
     // VC++ (at least from 4.0 up to version 7.1) is incredibly broken in that
     // a "catch ( ... )" will *always* catch SEH exceptions in it even though
     // it should have never been the case... to prevent such catches from
@@ -93,7 +90,7 @@ extern int wxEntryReal(int& argc, wxChar **argv);
 #endif // __VISUALC__/!__VISUALC__
 
 // ----------------------------------------------------------------------------
-// wrapper wxEntry catching all Win32 exceptions occuring in a wx program
+// wrapper wxEntry catching all Win32 exceptions occurring in a wx program
 // ----------------------------------------------------------------------------
 
 // wrap real wxEntry in a try-except block to be able to call
@@ -121,16 +118,11 @@ unsigned long wxGlobalSEHandler(EXCEPTION_POINTERS *pExcPtrs)
         wxGlobalSEInformation = pExcPtrs;
 
         // give the user a chance to do something special about this
-        __try
+        wxSEH_TRY
         {
             wxTheApp->OnFatalException();
         }
-        __except ( EXCEPTION_EXECUTE_HANDLER )
-        {
-            // nothing to do here, just ignore the exception inside the
-            // exception handler
-            ;
-        }
+        wxSEH_IGNORE      // ignore any exceptions inside the exception handler
 
         wxGlobalSEInformation = NULL;
 
@@ -143,7 +135,7 @@ unsigned long wxGlobalSEHandler(EXCEPTION_POINTERS *pExcPtrs)
 
 #ifdef __VISUALC__
 
-static void wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS *ep)
+void wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS *ep)
 {
     switch ( wxGlobalSEHandler(ep) )
     {
@@ -211,22 +203,16 @@ int wxEntry(int& argc, wxChar **argv)
 {
     DisableAutomaticSETranslator();
 
-    __try
+    wxSEH_TRY
     {
         return wxEntryReal(argc, argv);
     }
-    __except ( wxGlobalSEHandler(GetExceptionInformation()) )
-    {
-        wxFatalExit();
-
-        // this code is unreachable but put it here to suppress warnings
-        return -1;
-    }
+    wxSEH_HANDLE(-1)
 }
 
 #else // !wxUSE_ON_FATAL_EXCEPTION
 
-#ifdef __VISUALC__
+#if defined(__VISUALC__) && !defined(__WXWINCE__)
 
 static void
 wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS * WXUNUSED(ep))
@@ -239,9 +225,7 @@ wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS * WXUNUSED(ep))
 
 int wxEntry(int& argc, wxChar **argv)
 {
-#ifndef __WXWINCE__
     DisableAutomaticSETranslator();
-#endif
 
     return wxEntryReal(argc, argv);
 }
@@ -250,17 +234,118 @@ int wxEntry(int& argc, wxChar **argv)
 
 #endif // wxUSE_BASE
 
-#if wxUSE_GUI
+#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() != wxOS_WINDOWS_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;
+#else // 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);
+#endif // !wxUSE_UNICODE_MSLU
+    }
+
+    return true;
+}
+
+#endif // NEED_UNICODE_CHECK
 
 // ----------------------------------------------------------------------------
 // Windows-specific wxEntry
 // ----------------------------------------------------------------------------
 
+// helper function used to clean up in wxEntry() just below
+//
+// notice that argv elements are supposed to be allocated using malloc() while
+// argv array itself is allocated with new
+static void wxFreeArgs(int argc, wxChar **argv)
+{
+    for ( int i = 0; i < argc; i++ )
+    {
+        free(argv[i]);
+    }
+
+    delete [] argv;
+}
+
 WXDLLEXPORT int wxEntry(HINSTANCE hInstance,
                         HINSTANCE WXUNUSED(hPrevInstance),
                         wxCmdLineArgType WXUNUSED(pCmdLine),
                         int nCmdShow)
 {
+    // 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
+#ifdef NEED_UNICODE_CHECK
+    if ( !wxIsUnicodeAvailable() )
+        return -1;
+#endif // NEED_UNICODE_CHECK
+
+
     // remember the parameters Windows gave us
     wxSetInstance(hInstance);
     wxApp::m_nCmdShow = nCmdShow;
@@ -295,59 +380,12 @@ WXDLLEXPORT int wxEntry(HINSTANCE hInstance,
     // argv[] must be NULL-terminated
     argv[argc] = NULL;
 
-    return wxEntry(argc, argv);
-}
-
-// May wish not to have a DllMain or WinMain, e.g. if we're programming
-// a Netscape plugin or if we're writing a console application
-#if !defined(NOMAIN)
-
-extern "C"
-{
-
-// ----------------------------------------------------------------------------
-// WinMain
-// ----------------------------------------------------------------------------
-
-// Note that WinMain is also defined in dummy.obj, which is linked to
-// an application that is using the DLL version of wxWidgets.
-
-#if defined(_WINDLL)
-
-// DLL entry point
-
-BOOL WINAPI
-DllMain(HANDLE hModule, DWORD fdwReason, LPVOID WXUNUSED(lpReserved))
-{
-    // Only call wxEntry if the application itself is part of the DLL.
-    // If only the wxWidgets library is in the DLL, then the
-    // initialisation will be called when the application implicitly
-    // calls WinMain.
-#ifndef WXMAKINGDLL
-    switch (fdwReason)
-    {
-        case DLL_PROCESS_ATTACH:
-            return wxEntry(hModule);
-
-        case DLL_PROCESS_DETACH:
-            wxEntryCleanup();
-            break;
-    }
-#else
-    (void)hModule;
-    (void)fdwReason;
-#endif // !WXMAKINGDLL
+    wxON_BLOCK_EXIT2(wxFreeArgs, argc, argv);
 
-    return TRUE;
+    return wxEntry(argc, argv);
 }
 
-#endif // _WINDLL
-
-} // extern "C"
-
-#endif // !NOMAIN
-
-#endif // wxUSE_GUI
+#endif // wxUSE_GUI && __WXMSW__
 
 // ----------------------------------------------------------------------------
 // global HINSTANCE
@@ -368,4 +406,3 @@ void wxSetInstance(HINSTANCE hInst)
 }
 
 #endif // wxUSE_BASE
-