src/common/log.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        log.cpp
   3 // Purpose:     Assorted wxLogXXX functions, and wxLog (sink for logs)
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19 #ifdef __GNUG__
  20   #pragma implementation "log.h"
  21 #endif
  22
  23 // For compilers that support precompilation, includes "wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27   #pragma hdrstop
  28 #endif
  29
  30 // wxWindows
  31 #ifndef WX_PRECOMP
  32   #include  <wx/app.h>
  33   #include  <wx/string.h>
  34   #include  <wx/intl.h>
  35   #include  <wx/menu.h>
  36
  37   #include  <wx/generic/msgdlgg.h>
  38   #include  <wx/filedlg.h>
  39   #include  <wx/textctrl.h>
  40 #endif //WX_PRECOMP
  41
  42 #include  <wx/file.h>
  43 #include  <wx/textfile.h>
  44 #include  <wx/utils.h>
  45 #include  <wx/log.h>
  46
  47 // other standard headers
  48 #include  <errno.h>
  49 #include  <stdlib.h>
  50 #include  <time.h>
  51
  52 #ifdef  __WXMSW__
  53   #include  <windows.h>
  54 #else   //Unix
  55   #include  <signal.h>
  56 #endif  //Win/Unix
  57
  58 // ----------------------------------------------------------------------------
  59 // non member functions
  60 // ----------------------------------------------------------------------------
  61
  62 // define this to enable wrapping of log messages
  63 //#define LOG_PRETTY_WRAP
  64
  65 #ifdef  LOG_PRETTY_WRAP
  66   static void wxLogWrap(FILE *f, const char *pszPrefix, const char *psz);
  67 #endif
  68
  69 // ============================================================================
  70 // implementation
  71 // ============================================================================
  72
  73 // ----------------------------------------------------------------------------
  74 // implementation of Log functions
  75 //
  76 // NB: unfortunately we need all these distinct functions, we can't make them
  77 //     macros and not all compilers inline vararg functions.
  78 // ----------------------------------------------------------------------------
  79
  80 // log functions can't allocate memory (LogError("out of memory...") should
  81 // work!), so we use a static buffer for all log messages
  82 #define LOG_BUFFER_SIZE   (4096)
  83
  84 // static buffer for error messages (@@@ MT-unsafe)
  85 static char s_szBuf[LOG_BUFFER_SIZE];
  86
  87 // generic log function
  88 void wxLogGeneric(wxLogLevel level, const char *szFormat, ...)
  89 {
  90   if ( wxLog::GetActiveTarget() != NULL ) {
  91     va_list argptr;
  92     va_start(argptr, szFormat);
  93     vsprintf(s_szBuf, szFormat, argptr);
  94     va_end(argptr);
  95
  96     wxLog::OnLog(level, s_szBuf);
  97   }
  98 }
  99
 100 #define IMPLEMENT_LOG_FUNCTION(level)                             \
 101   void wxLog##level(const char *szFormat, ...)                    \
 102   {                                                               \
 103     if ( wxLog::GetActiveTarget() != NULL ) {                     \
 104       va_list argptr;                                             \
 105       va_start(argptr, szFormat);                                 \
 106       vsprintf(s_szBuf, szFormat, argptr);                        \
 107       va_end(argptr);                                             \
 108                                                                   \
 109       wxLog::OnLog(wxLOG_##level, s_szBuf);                       \
 110     }                                                             \
 111   }
 112
 113 IMPLEMENT_LOG_FUNCTION(FatalError)
 114 IMPLEMENT_LOG_FUNCTION(Error)
 115 IMPLEMENT_LOG_FUNCTION(Warning)
 116 IMPLEMENT_LOG_FUNCTION(Message)
 117 IMPLEMENT_LOG_FUNCTION(Info)
 118 IMPLEMENT_LOG_FUNCTION(Status)
 119
 120 // same as info, but only if 'verbose' mode is on
 121 void wxLogVerbose(const char *szFormat, ...)
 122 {
 123   wxLog *pLog = wxLog::GetActiveTarget();
 124   if ( pLog != NULL && pLog->GetVerbose() ) {
 125     va_list argptr;
 126     va_start(argptr, szFormat);
 127     vsprintf(s_szBuf, szFormat, argptr);
 128     va_end(argptr);
 129
 130     wxLog::OnLog(wxLOG_Info, s_szBuf);
 131   }
 132 }
 133
 134 // debug functions
 135 #ifdef __WXDEBUG__
 136 #define IMPLEMENT_LOG_DEBUG_FUNCTION(level)                       \
 137   void wxLog##level(const char *szFormat, ...)                    \
 138   {                                                               \
 139     if ( wxLog::GetActiveTarget() != NULL ) {                     \
 140       va_list argptr;                                             \
 141       va_start(argptr, szFormat);                                 \
 142       vsprintf(s_szBuf, szFormat, argptr);                        \
 143       va_end(argptr);                                             \
 144                                                                   \
 145       wxLog::OnLog(wxLOG_##level, s_szBuf);                       \
 146     }                                                             \
 147   }
 148
 149   void wxLogTrace(wxTraceMask mask, const char *szFormat, ...)
 150   {
 151     wxLog *pLog = wxLog::GetActiveTarget();
 152
 153     // we check that all of mask bits are set in the current mask, so
 154     // that wxLogTrace(wxTraceRefCount | wxTraceOle) will only do something
 155     // if both bits are set.
 156     if ( pLog != NULL && ((pLog->GetTraceMask() & mask) == mask) ) {
 157       va_list argptr;
 158       va_start(argptr, szFormat);
 159       vsprintf(s_szBuf, szFormat, argptr);
 160       va_end(argptr);
 161
 162       wxLog::OnLog(wxLOG_Trace, s_szBuf);
 163     }
 164   }
 165
 166 #else // release
 167   #define IMPLEMENT_LOG_DEBUG_FUNCTION(level)
 168 #endif
 169
 170 IMPLEMENT_LOG_DEBUG_FUNCTION(Debug)
 171 IMPLEMENT_LOG_DEBUG_FUNCTION(Trace)
 172
 173 // wxLogSysError: one uses the last error code, for other  you must give it
 174 // explicitly
 175
 176 // common part of both wxLogSysError
 177 void wxLogSysErrorHelper(long lErrCode)
 178 {
 179   char szErrMsg[LOG_BUFFER_SIZE / 2];
 180   sprintf(szErrMsg, _(" (error %ld: %s)"), lErrCode, wxSysErrorMsg(lErrCode));
 181   strncat(s_szBuf, szErrMsg, WXSIZEOF(s_szBuf) - strlen(s_szBuf));
 182
 183   wxLog::OnLog(wxLOG_Error, s_szBuf);
 184 }
 185
 186 void WXDLLEXPORT wxLogSysError(const char *szFormat, ...)
 187 {
 188   va_list argptr;
 189   va_start(argptr, szFormat);
 190   vsprintf(s_szBuf, szFormat, argptr);
 191   va_end(argptr);
 192
 193   wxLogSysErrorHelper(wxSysErrorCode());
 194 }
 195
 196 void WXDLLEXPORT wxLogSysError(long lErrCode, const char *szFormat, ...)
 197 {
 198   va_list argptr;
 199   va_start(argptr, szFormat);
 200   vsprintf(s_szBuf, szFormat, argptr);
 201   va_end(argptr);
 202
 203   wxLogSysErrorHelper(lErrCode);
 204 }
 205
 206 // ----------------------------------------------------------------------------
 207 // wxLog class implementation
 208 // ----------------------------------------------------------------------------
 209
 210 wxLog::wxLog()
 211 {
 212   m_bHasMessages = FALSE;
 213   m_bVerbose     = FALSE;
 214   m_szTimeFormat = "[%d/%b/%y %H:%M:%S] ";
 215 }
 216
 217 wxLog *wxLog::GetActiveTarget()
 218 {
 219   if ( ms_bAutoCreate && ms_pLogger == NULL ) {
 220     // prevent infinite recursion if someone calls wxLogXXX() from
 221     // wxApp::CreateLogTarget()
 222     static bool s_bInGetActiveTarget = FALSE;
 223     if ( !s_bInGetActiveTarget ) {
 224       s_bInGetActiveTarget = TRUE;
 225
 226       #ifdef  WX_TEST_MINIMAL
 227         ms_pLogger = new wxLogStderr;
 228       #else
 229         // ask the application to create a log target for us
 230         if ( wxTheApp != NULL )
 231           ms_pLogger = wxTheApp->CreateLogTarget();
 232       #endif
 233
 234       // do nothing if it fails - what can we do?
 235     }
 236   }
 237
 238   return ms_pLogger;
 239 }
 240
 241 wxLog *wxLog::SetActiveTarget(wxLog *pLogger)
 242 {
 243   // flush the old messages before changing
 244   if ( ms_pLogger != NULL )
 245     ms_pLogger->Flush();
 246
 247   wxLog *pOldLogger = ms_pLogger;
 248   ms_pLogger = pLogger;
 249   return pOldLogger;
 250 }
 251
 252 void wxLog::DoLog(wxLogLevel level, const char *szString)
 253 {
 254   wxString str;
 255
 256   // prepend a timestamp if not disabled
 257   if ( !IsEmpty(m_szTimeFormat) ) {
 258     char szBuf[128];
 259     time_t timeNow;
 260     struct tm *ptmNow;
 261
 262     time(&timeNow);
 263     ptmNow = localtime(&timeNow);
 264
 265     strftime(szBuf, WXSIZEOF(szBuf), m_szTimeFormat, ptmNow);
 266     str = szBuf;
 267   }
 268
 269   switch ( level ) {
 270     case wxLOG_FatalError:
 271       DoLogString(str << _("Fatal error: ") << szString);
 272       DoLogString(_("Program aborted."));
 273       Flush();
 274       abort();
 275       break;
 276
 277     case wxLOG_Error:
 278       DoLogString(str << _("Error: ") << szString);
 279       break;
 280
 281     case wxLOG_Warning:
 282       DoLogString(str << _("Warning: ") << szString);
 283       break;
 284
 285     case wxLOG_Info:
 286       if ( GetVerbose() )
 287     case wxLOG_Message:
 288         DoLogString(str + szString);
 289       // fall through
 290
 291     case wxLOG_Status:
 292       // nothing to do
 293       break;
 294
 295     case wxLOG_Trace:
 296     case wxLOG_Debug:
 297       #ifdef __WXDEBUG__
 298         #ifdef  __WIN32__
 299           // in addition to normal logging, also send the string to debugger
 300           // (don't prepend "Debug" here: it will go to debug window anyhow)
 301           ::OutputDebugString(str + szString + "\n\r");
 302         #endif  //Win32
 303         DoLogString(str << (level == wxLOG_Trace ? _("Trace") : _("Debug"))
 304                         << ": " << szString);
 305       #endif
 306
 307       break;
 308
 309     default:
 310       wxFAIL_MSG("unknown log level in wxLog::DoLog");
 311   }
 312 }
 313
 314 void wxLog::DoLogString(const char *WXUNUSED(szString))
 315 {
 316   wxFAIL_MSG("DoLogString must be overrided if it's called.");
 317 }
 318
 319 void wxLog::Flush()
 320 {
 321   // do nothing
 322 }
 323
 324 // ----------------------------------------------------------------------------
 325 // wxLogStderr class implementation
 326 // ----------------------------------------------------------------------------
 327
 328 wxLogStderr::wxLogStderr(FILE *fp)
 329 {
 330   if ( fp == NULL )
 331     m_fp = stderr;
 332   else
 333     m_fp = fp;
 334 }
 335
 336 void wxLogStderr::DoLogString(const char *szString)
 337 {
 338   fputs(szString, m_fp);
 339   fputc('\n', m_fp);
 340   fflush(m_fp);
 341 }
 342
 343 // ----------------------------------------------------------------------------
 344 // wxLogStream implementation
 345 // ----------------------------------------------------------------------------
 346
 347 wxLogStream::wxLogStream(ostream *ostr)
 348 {
 349   if ( ostr == NULL )
 350     m_ostr = &cerr;
 351   else
 352     m_ostr = ostr;
 353 }
 354
 355 void wxLogStream::DoLogString(const char *szString)
 356 {
 357   (*m_ostr) << szString << endl << flush;
 358 }
 359
 360 // ----------------------------------------------------------------------------
 361 // wxLogTextCtrl implementation
 362 // ----------------------------------------------------------------------------
 363 wxLogTextCtrl::wxLogTextCtrl(wxTextCtrl *pTextCtrl)
 364 // @@@ TODO: in wxGTK wxTextCtrl doesn't derive from streambuf
 365
 366 // Also, in DLL mode in wxMSW, can't use it.
 367 #if defined(NO_TEXT_WINDOW_STREAM)
 368 #else
 369              : wxLogStream(new ostream(pTextCtrl))
 370 #endif
 371 {
 372 }
 373
 374 wxLogTextCtrl::~wxLogTextCtrl()
 375 {
 376   delete m_ostr;
 377 }
 378
 379 // ----------------------------------------------------------------------------
 380 // wxLogGui implementation
 381 // ----------------------------------------------------------------------------
 382
 383 #ifndef   WX_TEST_MINIMAL
 384
 385 wxLogGui::wxLogGui()
 386 {
 387   m_bErrors = FALSE;
 388 }
 389
 390 void wxLogGui::Flush()
 391 {
 392   if ( !m_bHasMessages )
 393     return;
 394
 395   // @@@ ugly...
 396
 397   // concatenate all strings (but not too many to not overfill the msg box)
 398   wxString str;
 399   uint nLines    = 0,
 400        nMsgCount = m_aMessages.Count();
 401
 402   // start from the most recent message
 403   for ( uint n = nMsgCount; n > 0; n-- ) {
 404     // for Windows strings longer than this value are wrapped (NT 4.0)
 405     const uint nMsgLineWidth = 156;
 406
 407     nLines += (m_aMessages[n - 1].Len() + nMsgLineWidth - 1) / nMsgLineWidth;
 408
 409     if ( nLines > 25 )  // don't put too many lines in message box
 410       break;
 411
 412     str << m_aMessages[n - 1] << "\n";
 413   }
 414
 415   if ( m_bErrors ) {
 416     wxMessageBox(str, _("Error"), wxOK | wxICON_EXCLAMATION);
 417   }
 418   else {
 419     wxMessageBox(str, _("Information"), wxOK | wxICON_INFORMATION);
 420   }
 421
 422   // no undisplayed messages whatsoever
 423   m_bHasMessages =
 424   m_bErrors      = FALSE;
 425   m_aMessages.Empty();
 426 }
 427
 428 // the default behaviour is to discard all informational messages if there
 429 // are any errors/warnings.
 430 void wxLogGui::DoLog(wxLogLevel level, const char *szString)
 431 {
 432   switch ( level ) {
 433     case wxLOG_Info:
 434       if ( GetVerbose() )
 435     case wxLOG_Message:
 436         if ( !m_bErrors ) {
 437           m_aMessages.Add(szString);
 438           m_bHasMessages = TRUE;
 439         }
 440       break;
 441
 442     case wxLOG_Status:
 443       {
 444         // find the top window and set it's status text if it has any
 445         wxWindow *pWin = wxTheApp->GetTopWindow();
 446         if ( pWin != NULL && pWin->IsKindOf(CLASSINFO(wxFrame)) ) {
 447           wxFrame *pFrame = (wxFrame *)pWin;
 448           pFrame->SetStatusText(szString);
 449         }
 450       }
 451       break;
 452
 453     case wxLOG_Trace:
 454     case wxLOG_Debug:
 455       #ifdef __WXDEBUG__
 456         #ifdef  __WIN32__
 457           OutputDebugString(szString);
 458           OutputDebugString("\n\r");
 459         #else   //!WIN32
 460           // send them to stderr
 461           fprintf(stderr, "%s: %s\n",
 462                   level == wxLOG_Trace ? _("Trace") : _("Debug"), szString);
 463           fflush(stderr);
 464         #endif  // WIN32
 465       #endif
 466       break;
 467
 468     case wxLOG_FatalError:
 469       // show this one immediately
 470       wxMessageBox(szString, _("Fatal error"), wxICON_HAND);
 471       break;
 472
 473     case wxLOG_Error:
 474     case wxLOG_Warning:
 475       // discard earlier informational messages if this is the 1st error
 476       if ( !m_bErrors ) {
 477         m_aMessages.Empty();
 478         m_bHasMessages = TRUE;
 479         m_bErrors = TRUE;
 480       }
 481
 482       m_aMessages.Add(szString);
 483       break;
 484
 485     default:
 486       wxFAIL_MSG("unknown log level in wxLogGui::DoLog");
 487   }
 488 }
 489
 490 // ----------------------------------------------------------------------------
 491 // wxLogWindow implementation
 492 // ----------------------------------------------------------------------------
 493
 494 // log frame class
 495 class wxLogFrame : public wxFrame
 496 {
 497 public:
 498   // ctor
 499   wxLogFrame(const char *szTitle);
 500
 501   // menu callbacks
 502   void OnClose(wxCommandEvent& event);
 503   void OnCloseWindow(wxCloseEvent& event);
 504   void OnSave (wxCommandEvent& event);
 505   void OnClear(wxCommandEvent& event);
 506
 507   // accessors
 508   wxTextCtrl *TextCtrl() const { return m_pTextCtrl; }
 509
 510 private:
 511   enum
 512   {
 513     Menu_Close = 100,
 514     Menu_Save,
 515     Menu_Clear
 516   };
 517
 518   wxTextCtrl *m_pTextCtrl;
 519
 520   DECLARE_EVENT_TABLE()
 521 };
 522
 523 BEGIN_EVENT_TABLE(wxLogFrame, wxFrame)
 524   // wxLogWindow menu events
 525   EVT_MENU(Menu_Close, wxLogFrame::OnClose)
 526   EVT_MENU(Menu_Save,  wxLogFrame::OnSave)
 527   EVT_MENU(Menu_Clear, wxLogFrame::OnClear)
 528
 529   EVT_CLOSE(wxLogFrame::OnCloseWindow)
 530 END_EVENT_TABLE()
 531
 532 wxLogFrame::wxLogFrame(const char *szTitle)
 533           : wxFrame(NULL, -1, szTitle)
 534 {
 535   // we don't want to be a top-level frame because it would prevent the
 536   // application termination when all other frames are closed
 537   wxTopLevelWindows.DeleteObject(this);
 538
 539   // @@ kludge: wxSIMPLE_BORDER is simply to prevent wxWindows from creating
 540   //    a rich edit control instead of a normal one we want
 541   m_pTextCtrl = new wxTextCtrl(this, -1, wxEmptyString, wxDefaultPosition,
 542                                wxDefaultSize,
 543                                wxSIMPLE_BORDER |
 544                                wxTE_MULTILINE  |
 545                                wxHSCROLL       |
 546                                wxTE_READONLY);
 547   /*
 548   m_pTextCtrl->SetEditable(FALSE);
 549   m_pTextCtrl->SetRichEdit(FALSE);
 550   */
 551
 552   // create menu
 553   wxMenuBar *pMenuBar = new wxMenuBar;
 554   wxMenu *pMenu = new wxMenu;
 555   pMenu->Append(Menu_Save,  "&Save...");
 556   pMenu->Append(Menu_Clear, "C&lear");
 557   pMenu->AppendSeparator();
 558   pMenu->Append(Menu_Close, "&Close");
 559   pMenuBar->Append(pMenu, "&Log");
 560   SetMenuBar(pMenuBar);
 561
 562   // @@ what about status bar? needed (for menu prompts)?
 563 }
 564
 565 void wxLogFrame::OnClose(wxCommandEvent& WXUNUSED(event))
 566 {
 567   // just hide the window
 568   Show(FALSE);
 569 }
 570
 571 void wxLogFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 572 {
 573   // just hide the window
 574   Show(FALSE);
 575 }
 576
 577 void wxLogFrame::OnSave(wxCommandEvent& WXUNUSED(event))
 578 {
 579   // get the file name
 580   // -----------------
 581   const char *szFileName = wxSaveFileSelector("log", "txt", "log.txt");
 582   if ( szFileName == NULL ) {
 583     // cancelled
 584     return;
 585   }
 586
 587   // open file
 588   // ---------
 589   wxFile file;
 590   bool bOk = FALSE;
 591   if ( wxFile::Exists(szFileName) ) {
 592     bool bAppend = FALSE;
 593     wxString strMsg;
 594     strMsg.Printf(_("Append log to file '%s' "
 595                     "(choosing [No] will overwrite it)?"), szFileName);
 596     switch ( wxMessageBox(strMsg, "Question", wxYES_NO | wxCANCEL) ) {
 597       case wxYES:
 598         bAppend = TRUE;
 599         break;
 600
 601       case wxNO:
 602         bAppend = FALSE;
 603         break;
 604
 605       case wxCANCEL:
 606         return;
 607
 608       default:
 609         wxFAIL_MSG("invalid message box return value");
 610     }
 611
 612     if ( bAppend ) {
 613       bOk = file.Open(szFileName, wxFile::write_append);
 614     }
 615     else {
 616       bOk = file.Create(szFileName, TRUE /* overwrite */);
 617     }
 618   }
 619   else {
 620     bOk = file.Create(szFileName);
 621   }
 622
 623   // retrieve text and save it
 624   // -------------------------
 625 #ifdef __WXGTK__
 626   // @@@@ TODO: no GetNumberOfLines and GetLineText in wxGTK yet
 627   wxLogError("Sorry, this function is not implemented under GTK");
 628 #else
 629   int nLines = m_pTextCtrl->GetNumberOfLines();
 630   for ( int nLine = 0; bOk && nLine < nLines; nLine++ ) {
 631     bOk = file.Write(m_pTextCtrl->GetLineText(nLine) + wxTextFile::GetEOL());
 632   }
 633 #endif //GTK
 634
 635   if ( bOk )
 636     bOk = file.Close();
 637
 638   if ( !bOk ) {
 639     wxLogError(_("Can't save log contents to file."));
 640     return;
 641   }
 642 }
 643
 644 void wxLogFrame::OnClear(wxCommandEvent& WXUNUSED(event))
 645 {
 646   m_pTextCtrl->Clear();
 647 }
 648
 649 wxLogWindow::wxLogWindow(const char *szTitle, bool bShow, bool bDoPass)
 650 {
 651   m_bPassMessages = bDoPass;
 652
 653   m_pLogFrame = new wxLogFrame(szTitle);
 654   m_pOldLog = wxLog::SetActiveTarget(this);
 655
 656   if ( bShow )
 657     m_pLogFrame->Show(TRUE);
 658 }
 659
 660 void wxLogWindow::Show(bool bShow)
 661 {
 662   m_pLogFrame->Show(bShow);
 663 }
 664
 665 wxFrame *wxLogWindow::GetFrame() const
 666 {
 667   return m_pLogFrame;
 668 }
 669
 670 void wxLogWindow::DoLog(wxLogLevel level, const char *szString)
 671 {
 672   // first let the previous logger show it
 673   if ( m_pOldLog != NULL && m_bPassMessages ) {
 674     // @@@ why can't we access protected wxLog method from here (we derive
 675     // from wxLog)? gcc gives "DoLog is protected in this context", what
 676     // does this mean? Anyhow, the cast is harmless and let's us do what
 677     // we want.
 678     ((wxLogWindow *)m_pOldLog)->DoLog(level, szString);
 679   }
 680
 681   // and this will format it nicely and call our DoLogString()
 682   wxLog::DoLog(level, szString);
 683 }
 684
 685 void wxLogWindow::DoLogString(const char *szString)
 686 {
 687   // put the text into our window
 688   wxTextCtrl *pText = m_pLogFrame->TextCtrl();
 689
 690   // remove selection (WriteText is in fact ReplaceSelection)
 691   #ifdef __WXMSW__
 692     long nLen = pText->GetLastPosition();
 693     pText->SetSelection(nLen, nLen);
 694   #endif // Windows
 695
 696   pText->WriteText(szString);
 697   pText->WriteText("\n"); // "\n" ok here (_not_ "\r\n")
 698
 699   // ensure that the line can be seen
 700   // @@@ TODO
 701 }
 702
 703 wxLogWindow::~wxLogWindow()
 704 {
 705   m_pLogFrame->Close(TRUE);
 706 }
 707
 708 #endif  //WX_TEST_MINIMAL
 709
 710 // ============================================================================
 711 // Global functions/variables
 712 // ============================================================================
 713
 714 // ----------------------------------------------------------------------------
 715 // static variables
 716 // ----------------------------------------------------------------------------
 717 wxLog      *wxLog::ms_pLogger      = NULL;
 718 bool        wxLog::ms_bAutoCreate  = TRUE;
 719 wxTraceMask wxLog::ms_ulTraceMask  = (wxTraceMask)0;
 720
 721 // ----------------------------------------------------------------------------
 722 // stdout error logging helper
 723 // ----------------------------------------------------------------------------
 724
 725 // helper function: wraps the message and justifies it under given position
 726 // (looks more pretty on the terminal). Also adds newline at the end.
 727 //
 728 // @@ this is now disabled until I find a portable way of determining the
 729 //    terminal window size (ok, I found it but does anybody really cares?)
 730 #ifdef    LOG_PRETTY_WRAP
 731 static void wxLogWrap(FILE *f, const char *pszPrefix, const char *psz)
 732 {
 733   size_t nMax = 80; // @@@@
 734   size_t nStart = strlen(pszPrefix);
 735   fputs(pszPrefix, f);
 736
 737   size_t n;
 738   while ( *psz != '\0' ) {
 739     for ( n = nStart; (n < nMax) && (*psz != '\0'); n++ )
 740       putc(*psz++, f);
 741
 742     // wrapped?
 743     if ( *psz != '\0' ) {
 744       /*putc('\n', f);*/
 745       for ( n = 0; n < nStart; n++ )
 746         putc(' ', f);
 747
 748       // as we wrapped, squeeze all white space
 749       while ( isspace(*psz) )
 750         psz++;
 751     }
 752   }
 753
 754   putc('\n', f);
 755 }
 756 #endif  //LOG_PRETTY_WRAP
 757
 758 // ----------------------------------------------------------------------------
 759 // error code/error message retrieval functions
 760 // ----------------------------------------------------------------------------
 761
 762 // get error code from syste
 763 unsigned long wxSysErrorCode()
 764 {
 765   #ifdef  __WXMSW__
 766     #ifdef  __WIN32__
 767       return ::GetLastError();
 768     #else   //WIN16
 769       // @@@@ what to do on Windows 3.1?
 770       return 0;
 771     #endif  //WIN16/32
 772   #else   //Unix
 773     return errno;
 774   #endif  //Win/Unix
 775 }
 776
 777 // get error message from system
 778 const char *wxSysErrorMsg(unsigned long nErrCode)
 779 {
 780   if ( nErrCode == 0 )
 781     nErrCode = wxSysErrorCode();
 782
 783   #ifdef  __WXMSW__
 784     #ifdef  __WIN32__
 785       static char s_szBuf[LOG_BUFFER_SIZE / 2];
 786
 787       // get error message from system
 788       LPVOID lpMsgBuf;
 789       FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
 790                     NULL, nErrCode,
 791                     MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
 792                     (LPTSTR)&lpMsgBuf,
 793                     0, NULL);
 794
 795       // copy it to our buffer and free memory
 796       strncpy(s_szBuf, (const char *)lpMsgBuf, WXSIZEOF(s_szBuf) - 1);
 797       s_szBuf[WXSIZEOF(s_szBuf) - 1] = '\0';
 798       LocalFree(lpMsgBuf);
 799
 800       // returned string is capitalized and ended with '\r\n' - bad
 801       s_szBuf[0] = (char)wxToLower(s_szBuf[0]);
 802       size_t len = strlen(s_szBuf);
 803       if ( len > 0 ) {
 804         // truncate string
 805         if ( s_szBuf[len - 2] == '\r' )
 806           s_szBuf[len - 2] = '\0';
 807       }
 808
 809       return s_szBuf;
 810     #else   //Win16
 811       // TODO @@@@
 812       return NULL;
 813     #endif // Win16/32
 814   #else   // Unix
 815     return strerror(nErrCode);
 816   #endif  // Win/Unix
 817 }
 818
 819 // ----------------------------------------------------------------------------
 820 // debug helper
 821 // ----------------------------------------------------------------------------
 822
 823 #ifdef  __WXDEBUG__
 824
 825 void Trap()
 826 {
 827   #ifdef __WXMSW__
 828     DebugBreak();
 829   #else // Unix
 830     raise(SIGTRAP);
 831   #endif // Win/Unix
 832 }
 833
 834 // this function is called when an assert fails
 835 void wxOnAssert(const char *szFile, int nLine, const char *szMsg)
 836 {
 837   // this variable can be set to true to suppress "assert failure" messages
 838   static bool s_bNoAsserts = FALSE;
 839   static bool s_bInAssert = FALSE;
 840
 841   if ( s_bInAssert ) {
 842     // He-e-e-e-elp!! we're trapped in endless loop
 843     Trap();
 844   }
 845
 846   s_bInAssert = TRUE;
 847
 848   char szBuf[LOG_BUFFER_SIZE];
 849   sprintf(szBuf, _("Assert failed in file %s at line %d"), szFile, nLine);
 850   if ( szMsg != NULL ) {
 851     strcat(szBuf, ": ");
 852     strcat(szBuf, szMsg);
 853   }
 854   else {
 855     strcat(szBuf, ".");
 856   }
 857
 858   if ( !s_bNoAsserts ) {
 859     // send it to the normal log destination
 860     wxLogDebug(szBuf);
 861
 862     strcat(szBuf, _("\nDo you want to stop the program?"
 863                     "\nYou can also choose [Cancel] to suppress "
 864                     "further warnings."));
 865
 866     switch ( wxMessageBox(szBuf, _("Debug"),
 867                           wxYES_NO | wxCANCEL | wxICON_STOP ) ) {
 868       case wxYES:
 869         Trap();
 870         break;
 871
 872       case wxCANCEL:
 873         s_bNoAsserts = TRUE;
 874         break;
 875
 876       //case wxNO: nothing to do
 877     }
 878   }
 879
 880   s_bInAssert = FALSE;
 881 }
 882
 883 #endif  //WXDEBUG
 884