| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/msw/main.cpp |
| 3 | // Purpose: WinMain/DllMain |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 04/01/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | // For compilers that support precompilation, includes "wx.h". |
| 21 | #include "wx/wxprec.h" |
| 22 | |
| 23 | #ifdef __BORLANDC__ |
| 24 | #pragma hdrstop |
| 25 | #endif |
| 26 | |
| 27 | #ifndef WX_PRECOMP |
| 28 | #include "wx/event.h" |
| 29 | #include "wx/app.h" |
| 30 | #include "wx/utils.h" |
| 31 | #endif //WX_PRECOMP |
| 32 | |
| 33 | #include "wx/cmdline.h" |
| 34 | #include "wx/scopeguard.h" |
| 35 | |
| 36 | #include "wx/msw/private.h" |
| 37 | #include "wx/msw/seh.h" |
| 38 | |
| 39 | #if wxUSE_ON_FATAL_EXCEPTION |
| 40 | #include "wx/datetime.h" |
| 41 | #include "wx/msw/crashrpt.h" |
| 42 | #endif // wxUSE_ON_FATAL_EXCEPTION |
| 43 | |
| 44 | #ifdef __WXWINCE__ |
| 45 | // there is no ExitProcess() under CE but exiting the main thread has the |
| 46 | // same effect |
| 47 | #ifndef ExitProcess |
| 48 | #define ExitProcess ExitThread |
| 49 | #endif |
| 50 | #endif // __WXWINCE__ |
| 51 | |
| 52 | #ifdef __BORLANDC__ |
| 53 | // BC++ has to be special: its run-time expects the DLL entry point to be |
| 54 | // named DllEntryPoint instead of the (more) standard DllMain |
| 55 | #define DllMain DllEntryPoint |
| 56 | #endif // __BORLANDC__ |
| 57 | |
| 58 | #if defined(__WXMICROWIN__) |
| 59 | #define HINSTANCE HANDLE |
| 60 | #endif |
| 61 | |
| 62 | // defined in common/init.cpp |
| 63 | extern int wxEntryReal(int& argc, wxChar **argv); |
| 64 | extern int wxEntryCleanupReal(int& argc, wxChar **argv); |
| 65 | |
| 66 | // ============================================================================ |
| 67 | // implementation: various entry points |
| 68 | // ============================================================================ |
| 69 | |
| 70 | #if wxUSE_BASE |
| 71 | |
| 72 | // ---------------------------------------------------------------------------- |
| 73 | // wrapper wxEntry catching all Win32 exceptions occurring in a wx program |
| 74 | // ---------------------------------------------------------------------------- |
| 75 | |
| 76 | // wrap real wxEntry in a try-except block to be able to call |
| 77 | // OnFatalException() if necessary |
| 78 | #if wxUSE_ON_FATAL_EXCEPTION |
| 79 | |
| 80 | // global pointer to exception information, only valid inside OnFatalException, |
| 81 | // used by wxStackWalker and wxCrashReport |
| 82 | extern EXCEPTION_POINTERS *wxGlobalSEInformation = NULL; |
| 83 | |
| 84 | // flag telling us whether the application wants to handle exceptions at all |
| 85 | static bool gs_handleExceptions = false; |
| 86 | |
| 87 | static void wxFatalExit() |
| 88 | { |
| 89 | // use the same exit code as abort() |
| 90 | ::ExitProcess(3); |
| 91 | } |
| 92 | |
| 93 | unsigned long wxGlobalSEHandler(EXCEPTION_POINTERS *pExcPtrs) |
| 94 | { |
| 95 | if ( gs_handleExceptions && wxTheApp ) |
| 96 | { |
| 97 | // store the pointer to exception info |
| 98 | wxGlobalSEInformation = pExcPtrs; |
| 99 | |
| 100 | // give the user a chance to do something special about this |
| 101 | wxSEH_TRY |
| 102 | { |
| 103 | wxTheApp->OnFatalException(); |
| 104 | } |
| 105 | wxSEH_IGNORE // ignore any exceptions inside the exception handler |
| 106 | |
| 107 | wxGlobalSEInformation = NULL; |
| 108 | |
| 109 | // this will execute our handler and terminate the process |
| 110 | return EXCEPTION_EXECUTE_HANDLER; |
| 111 | } |
| 112 | |
| 113 | return EXCEPTION_CONTINUE_SEARCH; |
| 114 | } |
| 115 | |
| 116 | #ifdef __VISUALC__ |
| 117 | |
| 118 | void wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS *ep) |
| 119 | { |
| 120 | switch ( wxGlobalSEHandler(ep) ) |
| 121 | { |
| 122 | default: |
| 123 | wxFAIL_MSG( wxT("unexpected wxGlobalSEHandler() return value") ); |
| 124 | // fall through |
| 125 | |
| 126 | case EXCEPTION_EXECUTE_HANDLER: |
| 127 | // if wxApp::OnFatalException() had been called we should exit the |
| 128 | // application -- but we shouldn't kill our host when we're a DLL |
| 129 | #ifndef WXMAKINGDLL |
| 130 | wxFatalExit(); |
| 131 | #endif // not a DLL |
| 132 | break; |
| 133 | |
| 134 | case EXCEPTION_CONTINUE_SEARCH: |
| 135 | // we're called for each "catch ( ... )" and if we (re)throw from |
| 136 | // here, the catch handler body is not executed, so the effect is |
| 137 | // as if had inhibited translation of SE to C++ ones because the |
| 138 | // handler will never see any structured exceptions |
| 139 | throw; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | #endif // __VISUALC__ |
| 144 | |
| 145 | bool wxHandleFatalExceptions(bool doit) |
| 146 | { |
| 147 | // assume this can only be called from the main thread |
| 148 | gs_handleExceptions = doit; |
| 149 | |
| 150 | #if wxUSE_CRASHREPORT |
| 151 | if ( doit ) |
| 152 | { |
| 153 | // try to find a place where we can put out report file later |
| 154 | wxChar fullname[MAX_PATH]; |
| 155 | if ( !::GetTempPath(WXSIZEOF(fullname), fullname) ) |
| 156 | { |
| 157 | wxLogLastError(wxT("GetTempPath")); |
| 158 | |
| 159 | // when all else fails... |
| 160 | wxStrcpy(fullname, wxT("c:\\")); |
| 161 | } |
| 162 | |
| 163 | // use PID and date to make the report file name more unique |
| 164 | wxString name = wxString::Format |
| 165 | ( |
| 166 | wxT("%s_%s_%lu.dmp"), |
| 167 | wxTheApp ? (const wxChar*)wxTheApp->GetAppDisplayName().c_str() |
| 168 | : wxT("wxwindows"), |
| 169 | wxDateTime::Now().Format(wxT("%Y%m%dT%H%M%S")).c_str(), |
| 170 | ::GetCurrentProcessId() |
| 171 | ); |
| 172 | |
| 173 | wxStrncat(fullname, name, WXSIZEOF(fullname) - wxStrlen(fullname) - 1); |
| 174 | |
| 175 | wxCrashReport::SetFileName(fullname); |
| 176 | } |
| 177 | #endif // wxUSE_CRASHREPORT |
| 178 | |
| 179 | return true; |
| 180 | } |
| 181 | |
| 182 | int wxEntry(int& argc, wxChar **argv) |
| 183 | { |
| 184 | DisableAutomaticSETranslator(); |
| 185 | |
| 186 | wxSEH_TRY |
| 187 | { |
| 188 | return wxEntryReal(argc, argv); |
| 189 | } |
| 190 | wxSEH_HANDLE(-1) |
| 191 | } |
| 192 | |
| 193 | #else // !wxUSE_ON_FATAL_EXCEPTION |
| 194 | |
| 195 | int wxEntry(int& argc, wxChar **argv) |
| 196 | { |
| 197 | return wxEntryReal(argc, argv); |
| 198 | } |
| 199 | |
| 200 | #endif // wxUSE_ON_FATAL_EXCEPTION/!wxUSE_ON_FATAL_EXCEPTION |
| 201 | |
| 202 | #endif // wxUSE_BASE |
| 203 | |
| 204 | #if wxUSE_GUI && defined(__WXMSW__) |
| 205 | |
| 206 | #if wxUSE_UNICODE && !defined(__WXWINCE__) |
| 207 | #define NEED_UNICODE_CHECK |
| 208 | #endif |
| 209 | |
| 210 | #ifdef NEED_UNICODE_CHECK |
| 211 | |
| 212 | // check whether Unicode is available |
| 213 | static bool wxIsUnicodeAvailable() |
| 214 | { |
| 215 | static const wchar_t *ERROR_STRING = L"wxWidgets Fatal Error"; |
| 216 | |
| 217 | if ( wxGetOsVersion() != wxOS_WINDOWS_NT ) |
| 218 | { |
| 219 | // we need to be built with MSLU support |
| 220 | #if !wxUSE_UNICODE_MSLU |
| 221 | // note that we can use MessageBoxW() as it's implemented even under |
| 222 | // Win9x - OTOH, we can't use wxGetTranslation() because the file APIs |
| 223 | // used by wxLocale are not |
| 224 | ::MessageBox |
| 225 | ( |
| 226 | NULL, |
| 227 | L"This program uses Unicode and requires Windows NT/2000/XP.\n" |
| 228 | L"\n" |
| 229 | L"Program aborted.", |
| 230 | ERROR_STRING, |
| 231 | MB_ICONERROR | MB_OK |
| 232 | ); |
| 233 | |
| 234 | return false; |
| 235 | #else // wxUSE_UNICODE_MSLU |
| 236 | // and the MSLU DLL must also be available |
| 237 | HMODULE hmod = ::LoadLibraryA("unicows.dll"); |
| 238 | if ( !hmod ) |
| 239 | { |
| 240 | ::MessageBox |
| 241 | ( |
| 242 | NULL, |
| 243 | L"This program uses Unicode and requires unicows.dll to work " |
| 244 | L"under current operating system.\n" |
| 245 | L"\n" |
| 246 | L"Please install unicows.dll and relaunch the program.", |
| 247 | ERROR_STRING, |
| 248 | MB_ICONERROR | MB_OK |
| 249 | ); |
| 250 | return false; |
| 251 | } |
| 252 | |
| 253 | // this is not really necessary but be tidy |
| 254 | ::FreeLibrary(hmod); |
| 255 | |
| 256 | // finally do the last check: has unicows.lib initialized correctly? |
| 257 | hmod = ::LoadLibraryW(L"unicows.dll"); |
| 258 | if ( !hmod ) |
| 259 | { |
| 260 | ::MessageBox |
| 261 | ( |
| 262 | NULL, |
| 263 | L"This program uses Unicode but is not using unicows.dll\n" |
| 264 | L"correctly and so cannot work under current operating system.\n" |
| 265 | L"Please contact the program author for an updated version.\n" |
| 266 | L"\n" |
| 267 | L"Program aborted.", |
| 268 | ERROR_STRING, |
| 269 | MB_ICONERROR | MB_OK |
| 270 | ); |
| 271 | |
| 272 | return false; |
| 273 | } |
| 274 | |
| 275 | ::FreeLibrary(hmod); |
| 276 | #endif // !wxUSE_UNICODE_MSLU |
| 277 | } |
| 278 | |
| 279 | return true; |
| 280 | } |
| 281 | |
| 282 | #endif // NEED_UNICODE_CHECK |
| 283 | |
| 284 | // ---------------------------------------------------------------------------- |
| 285 | // Windows-specific wxEntry |
| 286 | // ---------------------------------------------------------------------------- |
| 287 | |
| 288 | struct wxMSWCommandLineArguments |
| 289 | { |
| 290 | wxMSWCommandLineArguments() { argc = 0; argv = NULL; } |
| 291 | |
| 292 | void Init(const wxArrayString& args) |
| 293 | { |
| 294 | argc = args.size(); |
| 295 | |
| 296 | // +1 here for the terminating NULL |
| 297 | argv = new wxChar *[argc + 1]; |
| 298 | for ( int i = 0; i < argc; i++ ) |
| 299 | { |
| 300 | argv[i] = wxStrdup(args[i].wx_str()); |
| 301 | } |
| 302 | |
| 303 | // argv[] must be NULL-terminated |
| 304 | argv[argc] = NULL; |
| 305 | } |
| 306 | |
| 307 | void Free() |
| 308 | { |
| 309 | if ( !argc ) |
| 310 | return; |
| 311 | |
| 312 | for ( int i = 0; i < argc; i++ ) |
| 313 | { |
| 314 | free(argv[i]); |
| 315 | } |
| 316 | |
| 317 | delete [] argv; |
| 318 | argv = NULL; |
| 319 | argc = 0; |
| 320 | } |
| 321 | |
| 322 | int argc; |
| 323 | wxChar **argv; |
| 324 | }; |
| 325 | |
| 326 | static wxMSWCommandLineArguments wxArgs; |
| 327 | |
| 328 | // common part of wxMSW-specific wxEntryStart() and wxEntry() overloads |
| 329 | static bool |
| 330 | wxMSWEntryCommon(HINSTANCE hInstance, int nCmdShow) |
| 331 | { |
| 332 | // the first thing to do is to check if we're trying to run an Unicode |
| 333 | // program under Win9x w/o MSLU emulation layer - if so, abort right now |
| 334 | // as it has no chance to work and has all chances to crash |
| 335 | #ifdef NEED_UNICODE_CHECK |
| 336 | if ( !wxIsUnicodeAvailable() ) |
| 337 | return false; |
| 338 | #endif // NEED_UNICODE_CHECK |
| 339 | |
| 340 | |
| 341 | // remember the parameters Windows gave us |
| 342 | wxSetInstance(hInstance); |
| 343 | wxApp::m_nCmdShow = nCmdShow; |
| 344 | |
| 345 | // parse the command line: we can't use pCmdLine in Unicode build so it is |
| 346 | // simpler to never use it at all (this also results in a more correct |
| 347 | // argv[0]) |
| 348 | |
| 349 | // break the command line in words |
| 350 | wxArrayString args; |
| 351 | |
| 352 | const wxChar *cmdLine = ::GetCommandLine(); |
| 353 | if ( cmdLine ) |
| 354 | { |
| 355 | args = wxCmdLineParser::ConvertStringToArgs(cmdLine); |
| 356 | } |
| 357 | |
| 358 | #ifdef __WXWINCE__ |
| 359 | // WinCE doesn't insert the program itself, so do it ourselves. |
| 360 | args.Insert(wxGetFullModuleName(), 0); |
| 361 | #endif |
| 362 | |
| 363 | wxArgs.Init(args); |
| 364 | |
| 365 | return true; |
| 366 | } |
| 367 | |
| 368 | WXDLLEXPORT bool wxEntryStart(HINSTANCE hInstance, |
| 369 | HINSTANCE WXUNUSED(hPrevInstance), |
| 370 | wxCmdLineArgType WXUNUSED(pCmdLine), |
| 371 | int nCmdShow) |
| 372 | { |
| 373 | if ( !wxMSWEntryCommon(hInstance, nCmdShow) ) |
| 374 | return false; |
| 375 | |
| 376 | return wxEntryStart(wxArgs.argc, wxArgs.argv); |
| 377 | } |
| 378 | |
| 379 | WXDLLEXPORT int wxEntry(HINSTANCE hInstance, |
| 380 | HINSTANCE WXUNUSED(hPrevInstance), |
| 381 | wxCmdLineArgType WXUNUSED(pCmdLine), |
| 382 | int nCmdShow) |
| 383 | { |
| 384 | if ( !wxMSWEntryCommon(hInstance, nCmdShow) ) |
| 385 | return -1; |
| 386 | |
| 387 | wxON_BLOCK_EXIT_OBJ0(wxArgs, wxMSWCommandLineArguments::Free); |
| 388 | |
| 389 | return wxEntry(wxArgs.argc, wxArgs.argv); |
| 390 | } |
| 391 | |
| 392 | #endif // wxUSE_GUI && __WXMSW__ |
| 393 | |
| 394 | // ---------------------------------------------------------------------------- |
| 395 | // global HINSTANCE |
| 396 | // ---------------------------------------------------------------------------- |
| 397 | |
| 398 | #if wxUSE_BASE |
| 399 | |
| 400 | HINSTANCE wxhInstance = 0; |
| 401 | |
| 402 | extern "C" HINSTANCE wxGetInstance() |
| 403 | { |
| 404 | return wxhInstance; |
| 405 | } |
| 406 | |
| 407 | void wxSetInstance(HINSTANCE hInst) |
| 408 | { |
| 409 | wxhInstance = hInst; |
| 410 | } |
| 411 | |
| 412 | #endif // wxUSE_BASE |