added wxprec.h

[wxWidgets.git] / include / wx / log.h

diff --git a/include/wx/log.h b/include/wx/log.h
index a0cd25c50d77b6f166d6812f81a7ed0cea97d034..f57a0ddb551c4e30eb38d2acd6ea0a57951dd97b 100644 (file)
--- a/include/wx/log.h
+++ b/include/wx/log.h
@@ -1,22 +1,59 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        log.h
+// Name:        wx/log.h

 // Purpose:     Assorted wxLogXXX functions, and wxLog (sink for logs)
 // Author:      Vadim Zeitlin
 // Modified by:
 // Created:     29/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
 // Purpose:     Assorted wxLogXXX functions, and wxLog (sink for logs)
 // Author:      Vadim Zeitlin
 // Modified by:
 // Created:     29/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>

-// Licence:     wxWindows license
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 

-#ifndef   _WX_LOG_H_
-#define   _WX_LOG_H_
+#ifndef _WX_LOG_H_
+#define _WX_LOG_H_

 
 

-#ifdef  __GNUG__
+#if defined(__GNUG__) && !defined(__APPLE__)

     #pragma interface "log.h"
 #endif
 
     #pragma interface "log.h"
 #endif
 

-#include <wx/dynarray.h>
+#include "wx/string.h"
+
+#if wxUSE_LOG
+
+// ----------------------------------------------------------------------------
+// forward declarations
+// ----------------------------------------------------------------------------
+
+#if wxUSE_GUI
+    class WXDLLIMPEXP_CORE wxTextCtrl;
+    class WXDLLIMPEXP_CORE wxLogFrame;
+    class WXDLLIMPEXP_CORE wxFrame;
+#endif // wxUSE_GUI
+
+// ----------------------------------------------------------------------------
+// types
+// ----------------------------------------------------------------------------
+
+typedef unsigned long wxTraceMask;
+typedef unsigned long wxLogLevel;
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#ifndef __WXWINCE__
+#include <time.h>   // for time_t
+#endif
+
+#include "wx/dynarray.h"
+
+#ifndef wxUSE_LOG_DEBUG
+#  ifdef __WXDEBUG__
+#    define wxUSE_LOG_DEBUG 1
+#  else // !__WXDEBUG__
+#    define wxUSE_LOG_DEBUG 0
+#  endif
+#endif

 
 // ----------------------------------------------------------------------------
 // constants
 
 // ----------------------------------------------------------------------------
 // constants


@@ -29,25 +66,26 @@ enum
     wxLOG_Error,      // a serious error, user must be informed about it
     wxLOG_Warning,    // user is normally informed about it but may be ignored
     wxLOG_Message,    // normal message (i.e. normal output of a non GUI app)
     wxLOG_Error,      // a serious error, user must be informed about it
     wxLOG_Warning,    // user is normally informed about it but may be ignored
     wxLOG_Message,    // normal message (i.e. normal output of a non GUI app)

-    wxLOG_Info,       // informational message (a.k.a. 'Verbose')

     wxLOG_Status,     // informational: might go to the status line of GUI app
     wxLOG_Status,     // informational: might go to the status line of GUI app

+    wxLOG_Info,       // informational message (a.k.a. 'Verbose')

     wxLOG_Debug,      // never shown to the user, disabled in release mode
     wxLOG_Trace,      // trace messages are also only enabled in debug mode
     wxLOG_Progress,   // used for progress indicator (not yet)
     wxLOG_Debug,      // never shown to the user, disabled in release mode
     wxLOG_Trace,      // trace messages are also only enabled in debug mode
     wxLOG_Progress,   // used for progress indicator (not yet)

-    wxLOG_User = 100  // user defined levels start here
+    wxLOG_User = 100, // user defined levels start here
+    wxLOG_Max = 10000

 };
 
 // symbolic trace masks - wxLogTrace("foo", "some trace message...") will be
 // discarded unless the string "foo" has been added to the list of allowed
 // ones with AddTraceMask()
 
 };
 
 // symbolic trace masks - wxLogTrace("foo", "some trace message...") will be
 // discarded unless the string "foo" has been added to the list of allowed
 // ones with AddTraceMask()
 

-#define wxTRACE_MemAlloc "memalloc" // trace memory allocation (new/delete)
-#define wxTRACE_Messages "messages" // trace window messages/X callbacks
-#define wxTRACE_ResAlloc "resalloc" // trace GDI resource allocation
-#define wxTRACE_RefCount "refcount" // trace various ref counting operations
+#define wxTRACE_MemAlloc wxT("memalloc") // trace memory allocation (new/delete)
+#define wxTRACE_Messages wxT("messages") // trace window messages/X callbacks
+#define wxTRACE_ResAlloc wxT("resalloc") // trace GDI resource allocation
+#define wxTRACE_RefCount wxT("refcount") // trace various ref counting operations

 
 #ifdef  __WXMSW__
 
 #ifdef  __WXMSW__

-    #define wxTRACE_OleCalls "ole"  // OLE interface calls
+    #define wxTRACE_OleCalls wxT("ole")  // OLE interface calls

 #endif
 
 // the trace masks have been superceded by symbolic trace constants, they're
 #endif
 
 // the trace masks have been superceded by symbolic trace constants, they're


@@ -64,38 +102,25 @@ enum
     #define wxTraceOleCalls 0x0100  // OLE interface calls
 #endif
 
     #define wxTraceOleCalls 0x0100  // OLE interface calls
 #endif
 

-typedef unsigned long wxTraceMask;
-typedef unsigned long wxLogLevel;
-
-// ----------------------------------------------------------------------------
-// forward declarations
-// ----------------------------------------------------------------------------
-
-class WXDLLEXPORT wxTextCtrl;
-class WXDLLEXPORT wxLogFrame;
-class WXDLLEXPORT wxFrame;
-
-#if wxUSE_IOSTREAMH
-// N.B. BC++ doesn't have istream.h, ostream.h
-#   include <iostream.h>
-#else
-#   include <ostream>
-#   if defined(__VISUALC__) || defined(__MWERKS__)
-        using namespace std;
-#   endif
-#endif
+#include "wx/iosfwrap.h"

 
 // ----------------------------------------------------------------------------
 // derive from this class to redirect (or suppress, or ...) log messages
 // normally, only a single instance of this class exists but it's not enforced
 // ----------------------------------------------------------------------------
 
 
 // ----------------------------------------------------------------------------
 // derive from this class to redirect (or suppress, or ...) log messages
 // normally, only a single instance of this class exists but it's not enforced
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxLog
+class WXDLLIMPEXP_BASE wxLog

 {
 public:
     // ctor
     wxLog();
 
 {
 public:
     // ctor
     wxLog();
 

+    // Internal buffer.
+        // Allow replacement of the fixed size static buffer with
+        // a user allocated one.  Pass in NULL to restore the
+        // built in static buffer.
+    static wxChar *SetLogBuffer( wxChar *buf, size_t size = 0 );
+

     // these functions allow to completely disable all log messages
         // is logging disabled now?
     static bool IsEnabled() { return ms_doLog; }
     // these functions allow to completely disable all log messages
         // is logging disabled now?
     static bool IsEnabled() { return ms_doLog; }


@@ -105,9 +130,9 @@ public:
 
     // static sink function - see DoLog() for function to overload in the
     // derived classes
 
     // static sink function - see DoLog() for function to overload in the
     // derived classes

-    static void OnLog(wxLogLevel level, const char *szString, time_t t)
+    static void OnLog(wxLogLevel level, const wxChar *szString, time_t t)

     {
     {

-        if ( IsEnabled() ) {
+        if ( IsEnabled() && ms_logLevel >= level ) {

             wxLog *pLogger = GetActiveTarget();
             if ( pLogger )
                 pLogger->DoLog(level, szString, t);
             wxLog *pLogger = GetActiveTarget();
             if ( pLogger )
                 pLogger->DoLog(level, szString, t);


@@ -119,10 +144,17 @@ public:
         // and iostream logs don't need it, but wxGuiLog does to avoid showing
         // 17 modal dialogs one after another)
     virtual void Flush();
         // and iostream logs don't need it, but wxGuiLog does to avoid showing
         // 17 modal dialogs one after another)
     virtual void Flush();

-        // call to Flush() may be optimized: call it only if this function
-        // returns true (although Flush() also returns immediately if there is
-        // no messages, this functions is more efficient because inline)
-    bool HasPendingMessages() const { return m_bHasMessages; }
+
+        // flush the active target if any
+    static void FlushActive()
+    {
+        if ( !ms_suspendCount )
+        {
+            wxLog *log = GetActiveTarget();
+            if ( log )
+                log->Flush();
+        }
+    }

 
     // only one sink is active at each moment
         // get current log target, will call wxApp::CreateLogTarget() to
 
     // only one sink is active at each moment
         // get current log target, will call wxApp::CreateLogTarget() to


@@ -131,13 +163,24 @@ public:
         // change log target, pLogger may be NULL
     static wxLog *SetActiveTarget(wxLog *pLogger);
 
         // change log target, pLogger may be NULL
     static wxLog *SetActiveTarget(wxLog *pLogger);
 

+        // suspend the message flushing of the main target until the next call
+        // to Resume() - this is mainly for internal use (to prevent wxYield()
+        // from flashing the messages)
+    static void Suspend() { ms_suspendCount++; }
+        // must be called for each Suspend()!
+    static void Resume() { ms_suspendCount--; }
+

     // functions controlling the default wxLog behaviour
         // verbose mode is activated by standard command-line '-verbose'
         // option
     // functions controlling the default wxLog behaviour
         // verbose mode is activated by standard command-line '-verbose'
         // option

-    void SetVerbose(bool bVerbose = TRUE) { m_bVerbose = bVerbose; }
+    static void SetVerbose(bool bVerbose = TRUE) { ms_bVerbose = bVerbose; }
+
+        // Set log level.  Log messages with level > logLevel will not be logged.
+    static void SetLogLevel(wxLogLevel logLevel) { ms_logLevel = logLevel; }
+

         // should GetActiveTarget() try to create a new log object if the
         // current is NULL?
         // should GetActiveTarget() try to create a new log object if the
         // current is NULL?

-    static void DontCreateOnDemand() { ms_bAutoCreate = FALSE; }
+    static void DontCreateOnDemand();

 
         // trace mask (see wxTraceXXX constants for details)
     static void SetTraceMask(wxTraceMask ulMask) { ms_ulTraceMask = ulMask; }
 
         // trace mask (see wxTraceXXX constants for details)
     static void SetTraceMask(wxTraceMask ulMask) { ms_ulTraceMask = ulMask; }


@@ -145,30 +188,52 @@ public:
     static void AddTraceMask(const wxString& str) { ms_aTraceMasks.Add(str); }
         // add string trace mask
     static void RemoveTraceMask(const wxString& str);
     static void AddTraceMask(const wxString& str) { ms_aTraceMasks.Add(str); }
         // add string trace mask
     static void RemoveTraceMask(const wxString& str);

+        // remove all string trace masks
+    static void ClearTraceMasks();
+       // get string trace masks
+    static const wxArrayString &GetTraceMasks() { return ms_aTraceMasks; }
+
+        // sets the timestamp string: this is used as strftime() format string
+        // for the log targets which add time stamps to the messages - set it
+        // to NULL to disable time stamping completely.
+    static void SetTimestamp(const wxChar *ts) { ms_timestamp = ts; }
+

 
     // accessors
         // gets the verbose status
 
     // accessors
         // gets the verbose status

-    bool GetVerbose() const { return m_bVerbose; }
+    static bool GetVerbose() { return ms_bVerbose; }

         // get trace mask
     static wxTraceMask GetTraceMask() { return ms_ulTraceMask; }
         // is this trace mask in the list?
         // get trace mask
     static wxTraceMask GetTraceMask() { return ms_ulTraceMask; }
         // is this trace mask in the list?

-    static bool IsAllowedTraceMask(const char *mask)
+    static bool IsAllowedTraceMask(const wxChar *mask)

         { return ms_aTraceMasks.Index(mask) != wxNOT_FOUND; }
         { return ms_aTraceMasks.Index(mask) != wxNOT_FOUND; }

+        // return the current loglevel limit
+    static wxLogLevel GetLogLevel() { return ms_logLevel; }
+
+        // get the current timestamp format string (may be NULL)
+    static const wxChar *GetTimestamp() { return ms_timestamp; }
+
+
+    // helpers
+        // put the time stamp into the string if ms_timestamp != NULL (don't
+        // change it otherwise)
+    static void TimeStamp(wxString *str);

 
     // make dtor virtual for all derived classes
     virtual ~wxLog() { }
 
 
     // make dtor virtual for all derived classes
     virtual ~wxLog() { }
 

-protected:
-    bool m_bHasMessages; // any messages in the queue?
-    bool m_bVerbose;     // FALSE => ignore LogInfo messages

 
 

+    // this method exists for backwards compatibility only, don't use
+    bool HasPendingMessages() const { return TRUE; }
+
+protected:

     // the logging functions that can be overriden
         // default DoLog() prepends the time stamp and a prefix corresponding
         // to the message to szString and then passes it to DoLogString()
     // the logging functions that can be overriden
         // default DoLog() prepends the time stamp and a prefix corresponding
         // to the message to szString and then passes it to DoLogString()

-    virtual void DoLog(wxLogLevel level, const char *szString, time_t t);
+    virtual void DoLog(wxLogLevel level, const wxChar *szString, time_t t);

         // default DoLogString does nothing but is not pure virtual because if
         // you override DoLog() you might not need it at all
         // default DoLogString does nothing but is not pure virtual because if
         // you override DoLog() you might not need it at all

-    virtual void DoLogString(const char *szString, time_t t);
+    virtual void DoLogString(const wxChar *szString, time_t t);

 
 private:
     // static variables
 
 private:
     // static variables


@@ -177,6 +242,15 @@ private:
     static wxLog      *ms_pLogger;      // currently active log sink
     static bool        ms_doLog;        // FALSE => all logging disabled
     static bool        ms_bAutoCreate;  // create new log targets on demand?
     static wxLog      *ms_pLogger;      // currently active log sink
     static bool        ms_doLog;        // FALSE => all logging disabled
     static bool        ms_bAutoCreate;  // create new log targets on demand?

+    static bool        ms_bVerbose;     // FALSE => ignore LogInfo messages
+
+    static wxLogLevel  ms_logLevel;     // limit logging to levels <= ms_logLevel
+
+    static size_t      ms_suspendCount; // if positive, logs are not flushed
+
+    // format string for strftime(), if NULL, time stamping log messages is
+    // disabled
+    static const wxChar *ms_timestamp;

 
     static wxTraceMask ms_ulTraceMask;   // controls wxLogTrace behaviour
     static wxArrayString ms_aTraceMasks; // more powerful filter for wxLogTrace
 
     static wxTraceMask ms_ulTraceMask;   // controls wxLogTrace behaviour
     static wxArrayString ms_aTraceMasks; // more powerful filter for wxLogTrace


@@ -187,155 +261,130 @@ private:
 // ----------------------------------------------------------------------------
 
 // log everything to a "FILE *", stderr by default
 // ----------------------------------------------------------------------------
 
 // log everything to a "FILE *", stderr by default

-class WXDLLEXPORT wxLogStderr : public wxLog
+class WXDLLIMPEXP_BASE wxLogStderr : public wxLog

 {
 {

+    DECLARE_NO_COPY_CLASS(wxLogStderr)
+

 public:
     // redirect log output to a FILE
     wxLogStderr(FILE *fp = (FILE *) NULL);
 
 public:
     // redirect log output to a FILE
     wxLogStderr(FILE *fp = (FILE *) NULL);
 

-private:
+protected:

     // implement sink function
     // implement sink function

-    virtual void DoLogString(const char *szString, time_t t);
+    virtual void DoLogString(const wxChar *szString, time_t t);

 
     FILE *m_fp;
 };
 
 #if wxUSE_STD_IOSTREAM
 
     FILE *m_fp;
 };
 
 #if wxUSE_STD_IOSTREAM

+

 // log everything to an "ostream", cerr by default
 // log everything to an "ostream", cerr by default

-class WXDLLEXPORT wxLogStream : public wxLog
+class WXDLLIMPEXP_BASE wxLogStream : public wxLog

 {
 public:
     // redirect log output to an ostream
 {
 public:
     // redirect log output to an ostream

-    wxLogStream(ostream *ostr = (ostream *) NULL);
+    wxLogStream(wxSTD ostream *ostr = (wxSTD ostream *) NULL);

 
 protected:
     // implement sink function
 
 protected:
     // implement sink function

-    virtual void DoLogString(const char *szString, time_t t);
+    virtual void DoLogString(const wxChar *szString, time_t t);

 
     // using ptr here to avoid including <iostream.h> from this file
 
     // using ptr here to avoid including <iostream.h> from this file

-    ostream *m_ostr;
+    wxSTD ostream *m_ostr;

 };
 };

-#endif
-
-#ifndef wxUSE_NOGUI

 
 

-#if wxUSE_STD_IOSTREAM
-// log everything to a text window (GUI only of course)
-class WXDLLEXPORT wxLogTextCtrl : public wxLogStream
-{
-public:
-    // we just create an ostream from wxTextCtrl and use it in base class
-    wxLogTextCtrl(wxTextCtrl *pTextCtrl);
-    ~wxLogTextCtrl();
-};
-#endif
+#endif // wxUSE_STD_IOSTREAM

 
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------

-// GUI log target, the default one for wxWindows programs
+// /dev/null log target: suppress logging until this object goes out of scope

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-class WXDLLEXPORT wxLogGui : public wxLog
-{
-public:
-    // ctor
-    wxLogGui();

 
 

-    // show all messages that were logged since the last Flush()
-    virtual void Flush();
+// example of usage:
+/*
+    void Foo()
+    {
+        wxFile file;

 
 

-protected:
-    virtual void DoLog(wxLogLevel level, const char *szString, time_t t);
+        // wxFile.Open() normally complains if file can't be opened, we don't
+        // want it
+        wxLogNull logNo;

 
 

-    // empty everything
-    void Clear();
+        if ( !file.Open("bar") )
+            ... process error ourselves ...

 
 

-    wxArrayString m_aMessages;
-    wxArrayLong   m_aTimes;
-    bool          m_bErrors,        // do we have any errors?
-                  m_bWarnings;      // any warnings?
+        // ~wxLogNull called, old log sink restored
+    }
+ */
+class WXDLLIMPEXP_BASE wxLogNull
+{
+public:
+    wxLogNull() : m_flagOld(wxLog::EnableLogging(FALSE)) { }
+    ~wxLogNull() { (void)wxLog::EnableLogging(m_flagOld); }
+
+private:
+    bool m_flagOld; // the previous value of the wxLog::ms_doLog

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------

-// (background) log window: this class forwards all log messages to the log
-// target which was active when it was instantiated, but also collects them
-// to the log window. This window has it's own menu which allows the user to
-// close it, clear the log contents or save it to the file.
+// chaining log target: installs itself as a log target and passes all
+// messages to the real log target given to it in the ctor but also forwards
+// them to the previously active one
+//
+// note that you don't have to call SetActiveTarget() with this class, it
+// does it itself in its ctor

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-class WXDLLEXPORT wxLogWindow : public wxLog
+
+class WXDLLIMPEXP_BASE wxLogChain : public wxLog

 {
 public:
 {
 public:

-    wxLogWindow(wxFrame *pParent,         // the parent frame (can be NULL)
-            const char *szTitle,      // the title of the frame
-            bool bShow = TRUE,        // show window immediately?
-            bool bPassToOld = TRUE);  // pass log messages to the old target?
-    ~wxLogWindow();
-
-    // window operations
-    // show/hide the log window
-    void Show(bool bShow = TRUE);
-    // retrieve the pointer to the frame
-    wxFrame *GetFrame() const;
+    wxLogChain(wxLog *logger);
+    virtual ~wxLogChain();
+
+    // change the new log target
+    void SetLog(wxLog *logger);
+
+    // this can be used to temporarily disable (and then reenable) passing
+    // messages to the old logger (by default we do pass them)
+    void PassMessages(bool bDoPass) { m_bPassMessages = bDoPass; }

 
 

-    // accessors
-    // the previous log target (may be NULL)
-    wxLog *GetOldLog() const { return m_pOldLog; }

     // are we passing the messages to the previous log target?
     bool IsPassingMessages() const { return m_bPassMessages; }
 
     // are we passing the messages to the previous log target?
     bool IsPassingMessages() const { return m_bPassMessages; }
 

-    // we can pass the messages to the previous log target (we're in this mode by
-    // default: we collect all messages in the window, but also let the default
-    // processing take place)
-    void PassMessages(bool bDoPass) { m_bPassMessages = bDoPass; }
+    // return the previous log target (may be NULL)
+    wxLog *GetOldLog() const { return m_logOld; }

 
 

-    // base class virtuals
-    // we don't need it ourselves, but we pass it to the previous logger
+    // override base class version to flush the old logger as well

     virtual void Flush();
 
     virtual void Flush();
 

-    // overridables
-    // called immediately after the log frame creation allowing for
-    // any extra initializations
-    virtual void OnFrameCreate(wxFrame *frame);
-    // called right before the log frame is going to be deleted
-    virtual void OnFrameDelete(wxFrame *frame);
-

 protected:
 protected:

-    virtual void DoLog(wxLogLevel level, const char *szString, time_t t);
-    virtual void DoLogString(const char *szString, time_t t);
+    // pass the chain to the old logger if needed
+    virtual void DoLog(wxLogLevel level, const wxChar *szString, time_t t);

 
 private:
 
 private:

-    bool        m_bPassMessages;  // pass messages to m_pOldLog?
-    wxLog      *m_pOldLog;        // previous log target
-    wxLogFrame *m_pLogFrame;      // the log frame
-};
+    // the current log target
+    wxLog *m_logNew;

 
 

-#endif // wxUSE_NOGUI
-
-// ----------------------------------------------------------------------------
-// /dev/null log target: suppress logging until this object goes out of scope
-// ----------------------------------------------------------------------------
+    // the previous log target
+    wxLog *m_logOld;

 
 

-// example of usage:
-/*
-   void Foo() {
-   wxFile file;
+    // do we pass the messages to the old logger?
+    bool m_bPassMessages;

 
 

-// wxFile.Open() normally complains if file can't be opened, we don't want it
-wxLogNull logNo;
-if ( !file.Open("bar") )
-... process error ourselves ...
+    DECLARE_NO_COPY_CLASS(wxLogChain)
+};

 
 

-// ~wxLogNull called, old log sink restored
-}
- */
-class WXDLLEXPORT wxLogNull
+// a chain log target which uses itself as the new logger
+class WXDLLIMPEXP_BASE wxLogPassThrough : public wxLogChain

 {
 public:
 {
 public:

-    wxLogNull() { m_flagOld = wxLog::EnableLogging(FALSE); }
-    ~wxLogNull() { (void)wxLog::EnableLogging(m_flagOld);   }
-
-private:
-    bool m_flagOld; // the previous value of the wxLog::ms_doLog
+    wxLogPassThrough();

 };
 
 };
 

+#if wxUSE_GUI
+    // include GUI log targets:
+    #include "wx/generic/logg.h"
+#endif // wxUSE_GUI
+

 // ============================================================================
 // global functions
 // ============================================================================
 // ============================================================================
 // global functions
 // ============================================================================


@@ -345,51 +394,100 @@ private:
 // for log messages for easy redirection
 // ----------------------------------------------------------------------------
 
 // for log messages for easy redirection
 // ----------------------------------------------------------------------------
 

+// ----------------------------------------------------------------------------
+// get error code/error message from system in a portable way
+// ----------------------------------------------------------------------------
+
+// return the last system error code
+WXDLLIMPEXP_BASE unsigned long wxSysErrorCode();
+
+// return the error message for given (or last if 0) error code
+WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
+
+// ----------------------------------------------------------------------------

 // define wxLog<level>
 // define wxLog<level>

-// -------------------
+// ----------------------------------------------------------------------------
+
+#define DECLARE_LOG_FUNCTION(level)                                         \
+extern void WXDLLIMPEXP_BASE wxVLog##level(const wxChar *szFormat,          \
+                                      va_list argptr);                      \
+extern void WXDLLIMPEXP_BASE wxLog##level(const wxChar *szFormat,           \
+                                     ...) ATTRIBUTE_PRINTF_1
+#define DECLARE_LOG_FUNCTION2_EXP(level, arg, expdecl)                      \
+extern void expdecl wxVLog##level(arg, const wxChar *szFormat,              \
+                                      va_list argptr);                      \
+extern void expdecl wxLog##level(arg, const wxChar *szFormat,               \
+                                     ...) ATTRIBUTE_PRINTF_2
+#define DECLARE_LOG_FUNCTION2(level, arg)                                   \
+    DECLARE_LOG_FUNCTION2_EXP(level, arg, WXDLLIMPEXP_BASE)
+
+#else // !wxUSE_LOG
+
+// log functions do nothing at all
+#define DECLARE_LOG_FUNCTION(level)                                         \
+inline void wxVLog##level(const wxChar *szFormat,                           \
+                                     va_list argptr) { }                    \
+inline void wxLog##level(const wxChar *szFormat, ...) { }
+#define DECLARE_LOG_FUNCTION2(level, arg)                                   \
+inline void wxVLog##level(arg, const wxChar *szFormat,                      \
+                                     va_list argptr) {}                     \
+inline void wxLog##level(arg, const wxChar *szFormat, ...) { }
+
+// Empty Class to fake wxLogNull
+class WXDLLIMPEXP_BASE wxLogNull
+{
+public:
+    wxLogNull() { }
+};
+
+// Dummy macros to replace some functions.
+#define wxSysErrorCode() (unsigned long)0
+#define wxSysErrorMsg( X ) (const wxChar*)NULL
+
+// Fake symbolic trace masks... for those that are used frequently
+#define wxTRACE_OleCalls wxT("") // OLE interface calls

 
 

-#define DECLARE_LOG_FUNCTION(level)                                 \
-extern void WXDLLEXPORT wxLog##level(const char *szFormat, ...)
-#define DECLARE_LOG_FUNCTION2(level, arg1)                          \
-extern void WXDLLEXPORT wxLog##level(arg1, const char *szFormat, ...)
+#endif // wxUSE_LOG/!wxUSE_LOG

 
 

-    // a generic function for all levels (level is passes as parameter)
-    DECLARE_LOG_FUNCTION2(Generic, wxLogLevel level);
+// a generic function for all levels (level is passes as parameter)
+DECLARE_LOG_FUNCTION2(Generic, wxLogLevel level);

 
 

-    // one function per each level
-    DECLARE_LOG_FUNCTION(FatalError);
-    DECLARE_LOG_FUNCTION(Error);
-    DECLARE_LOG_FUNCTION(Warning);
-    DECLARE_LOG_FUNCTION(Message);
-    DECLARE_LOG_FUNCTION(Info);
-    DECLARE_LOG_FUNCTION(Verbose);
+// one function per each level
+DECLARE_LOG_FUNCTION(FatalError);
+DECLARE_LOG_FUNCTION(Error);
+DECLARE_LOG_FUNCTION(Warning);
+DECLARE_LOG_FUNCTION(Message);
+DECLARE_LOG_FUNCTION(Info);
+DECLARE_LOG_FUNCTION(Verbose);

 
 

-    // this function sends the log message to the status line of the top level
-    // application frame, if any
-    DECLARE_LOG_FUNCTION(Status);
+// this function sends the log message to the status line of the top level
+// application frame, if any
+DECLARE_LOG_FUNCTION(Status);

 
 

+#if wxUSE_GUI

     // this one is the same as previous except that it allows to explicitly
     // specify the frame to which the output should go
     // this one is the same as previous except that it allows to explicitly
     // specify the frame to which the output should go

-    DECLARE_LOG_FUNCTION2(Status, wxFrame *pFrame);
+    DECLARE_LOG_FUNCTION2_EXP(Status, wxFrame *pFrame, WXDLLIMPEXP_CORE);
+#endif // wxUSE_GUI

 
 

-    // additional one: as wxLogError, but also logs last system call error code
-    // and the corresponding error message if available
-    DECLARE_LOG_FUNCTION(SysError);
+// additional one: as wxLogError, but also logs last system call error code
+// and the corresponding error message if available
+DECLARE_LOG_FUNCTION(SysError);

 
 

-    // and another one which also takes the error code (for those broken APIs
-    // that don't set the errno (like registry APIs in Win32))
-    DECLARE_LOG_FUNCTION2(SysError, long lErrCode);
+// and another one which also takes the error code (for those broken APIs
+// that don't set the errno (like registry APIs in Win32))
+DECLARE_LOG_FUNCTION2(SysError, long lErrCode);

 
 

-    // debug functions do nothing in release mode
-#ifdef  __WXDEBUG__
+// debug functions do nothing in release mode
+#if wxUSE_LOG_DEBUG

     DECLARE_LOG_FUNCTION(Debug);
 
     DECLARE_LOG_FUNCTION(Debug);
 

-    // first king of LogTrace is uncoditional: it doesn't check the level,
+    // first kind of LogTrace is unconditional: it doesn't check the level,

     DECLARE_LOG_FUNCTION(Trace);
 
     // this second version will only log the message if the mask had been
     // added to the list of masks with AddTraceMask()
     DECLARE_LOG_FUNCTION(Trace);
 
     // this second version will only log the message if the mask had been
     // added to the list of masks with AddTraceMask()

-    DECLARE_LOG_FUNCTION2(Trace, const char *mask);
+    DECLARE_LOG_FUNCTION2(Trace, const wxChar *mask);

 
     // the last one does nothing if all of level bits are not set
     // in wxLog::GetActive()->GetTraceMask() - it's deprecated in favour of
 
     // the last one does nothing if all of level bits are not set
     // in wxLog::GetActive()->GetTraceMask() - it's deprecated in favour of


@@ -397,41 +495,47 @@ extern void WXDLLEXPORT wxLog##level(arg1, const char *szFormat, ...)
     DECLARE_LOG_FUNCTION2(Trace, wxTraceMask mask);
 #else   //!debug
     // these functions do nothing in release builds
     DECLARE_LOG_FUNCTION2(Trace, wxTraceMask mask);
 #else   //!debug
     // these functions do nothing in release builds

-    inline void wxLogDebug(const char *, ...) { }
-    inline void wxLogTrace(const char *, ...) { }
-    inline void wxLogTrace(wxTraceMask, const char *, ...) { }
-    inline void wxLogTrace(const char *, const char *, ...) { }
-#endif
-
-
-    // are we in 'verbose' mode?
-    // (note that it's often handy to change this var manually from the
-    //  debugger, thus enabling/disabling verbose reporting for some
-    //  parts of the program only)
-    WXDLLEXPORT_DATA(extern bool) g_bVerbose;
-
-    // ----------------------------------------------------------------------------
-    // get error code/error message from system in a portable way
-    // ----------------------------------------------------------------------------
+    inline void wxVLogDebug(const wxChar *, va_list) { }
+    inline void wxLogDebug(const wxChar *, ...) { }
+    inline void wxVLogTrace(const wxChar *, va_list) { }
+    inline void wxLogTrace(const wxChar *, ...) { }
+    inline void wxVLogTrace(wxTraceMask, const wxChar *, va_list) { }
+    inline void wxLogTrace(wxTraceMask, const wxChar *, ...) { }
+    inline void wxVLogTrace(const wxChar *, const wxChar *, va_list) { }
+    inline void wxLogTrace(const wxChar *, const wxChar *, ...) { }
+#endif // debug/!debug
+
+// wxLogFatalError helper: show the (fatal) error to the user in a safe way,
+// i.e. without using wxMessageBox() for example because it could crash
+void WXDLLIMPEXP_BASE
+wxSafeShowMessage(const wxString& title, const wxString& text);

 
 

-    // return the last system error code
-    WXDLLEXPORT unsigned long wxSysErrorCode();
-    // return the error message for given (or last if 0) error code
-    WXDLLEXPORT const char* wxSysErrorMsg(unsigned long nErrCode = 0);
+// ----------------------------------------------------------------------------
+// debug only logging functions: use them with API name and error code
+// ----------------------------------------------------------------------------

 
 

-    // ----------------------------------------------------------------------------
-    // debug only logging functions: use them with API name and error code
-    // ----------------------------------------------------------------------------
+#ifdef __WXDEBUG__
+    // make life easier for people using VC++ IDE: clicking on the message
+    // will take us immediately to the place of the failed API
+#ifdef __VISUALC__
+    #define wxLogApiError(api, rc)                                            \
+        wxLogDebug(wxT("%s(%d): '%s' failed with error 0x%08lx (%s)."),       \
+                   __TFILE__, __LINE__, api,                                  \
+                   (long)rc, wxSysErrorMsg(rc))
+#else // !VC++
+    #define wxLogApiError(api, rc)                                            \
+        wxLogDebug(wxT("In file %s at line %d: '%s' failed with "             \
+                       "error 0x%08lx (%s)."),                                \
+                   __TFILE__, __LINE__, api,                                  \
+                   (long)rc, wxSysErrorMsg(rc))
+#endif // VC++/!VC++
+
+    #define wxLogLastError(api) wxLogApiError(api, wxSysErrorCode())

 
 

-#ifdef  __WXDEBUG__
-#define wxLogApiError(api, rc)                                              \
-    wxLogDebug("At %s(%d) '%s' failed with error %lx (%s).",  \
-            __FILE__, __LINE__, api,                       \
-            rc, wxSysErrorMsg(rc))
-#define wxLogLastError(api) wxLogApiError(api, wxSysErrorCode())

 #else   //!debug
 #else   //!debug

-    inline void wxLogApiError(const char *, long) { }
-    inline void wxLogLastError(const char *) { }
+    inline void wxLogApiError(const wxChar *, long) { }
+    inline void wxLogLastError(const wxChar *) { }

 #endif  //debug/!debug
 
 #endif  // _WX_LOG_H_
 #endif  //debug/!debug
 
 #endif  // _WX_LOG_H_

+