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wxWidgets/src/common/log.cpp
Julian Smart 2432b92dd7 Doc & Symantec C++ fixes 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1325 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1999-01-07 08:43:47 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: log.cpp
// 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
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "log.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
// wxWindows
#ifndef WX_PRECOMP
#include <wx/event.h>
#include <wx/app.h>
#include <wx/string.h>
#include <wx/intl.h>
#include <wx/menu.h>
#include <wx/frame.h>
#include <wx/msgdlg.h>
#include <wx/filedlg.h>
#include <wx/textctrl.h>
#endif //WX_PRECOMP
#include <wx/file.h>
#include <wx/textfile.h>
#include <wx/utils.h>
#include <wx/log.h>
// other standard headers
#include <errno.h>
#include <stdlib.h>
#include <time.h>
#ifdef __WXMSW__
#include <windows.h>
// Redefines OutputDebugString if necessary
#include "wx/msw/private.h"
#else //Unix
#include <signal.h>
#endif //Win/Unix
// ----------------------------------------------------------------------------
// non member functions
// ----------------------------------------------------------------------------
// define this to enable wrapping of log messages
//#define LOG_PRETTY_WRAP
#ifdef LOG_PRETTY_WRAP
static void wxLogWrap(FILE *f, const char *pszPrefix, const char *psz);
#endif
// ----------------------------------------------------------------------------
// global variables
// ----------------------------------------------------------------------------
// we use a global variable to store the frame pointer for wxLogStatus - bad,
// but it's he easiest way
static wxFrame *gs_pFrame;
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// implementation of Log functions
//
// NB: unfortunately we need all these distinct functions, we can't make them
// macros and not all compilers inline vararg functions.
// ----------------------------------------------------------------------------
// log functions can't allocate memory (LogError("out of memory...") should
// work!), so we use a static buffer for all log messages
#define LOG_BUFFER_SIZE (4096)
// static buffer for error messages (@@@ MT-unsafe)
static char s_szBuf[LOG_BUFFER_SIZE];
// generic log function
void wxLogGeneric(wxLogLevel level, const char *szFormat, ...)
{
if ( wxLog::GetActiveTarget() != NULL ) {
va_list argptr;
va_start(argptr, szFormat);
vsprintf(s_szBuf, szFormat, argptr);
va_end(argptr);
wxLog::OnLog(level, s_szBuf);
}
}
#define IMPLEMENT_LOG_FUNCTION(level) \
void wxLog##level(const char *szFormat, ...) \
{ \
if ( wxLog::GetActiveTarget() != NULL ) { \
va_list argptr; \
va_start(argptr, szFormat); \
vsprintf(s_szBuf, szFormat, argptr); \
va_end(argptr); \
\
wxLog::OnLog(wxLOG_##level, s_szBuf); \
} \
}
IMPLEMENT_LOG_FUNCTION(FatalError)
IMPLEMENT_LOG_FUNCTION(Error)
IMPLEMENT_LOG_FUNCTION(Warning)
IMPLEMENT_LOG_FUNCTION(Message)
IMPLEMENT_LOG_FUNCTION(Info)
IMPLEMENT_LOG_FUNCTION(Status)
// accepts an additional argument which tells to which frame the output should
// be directed
void wxLogStatus(wxFrame *pFrame, const char *szFormat, ...)
{
wxLog *pLog = wxLog::GetActiveTarget();
if ( pLog != NULL ) {
va_list argptr;
va_start(argptr, szFormat);
vsprintf(s_szBuf, szFormat, argptr);
va_end(argptr);
wxASSERT( gs_pFrame == NULL ); // should be reset!
gs_pFrame = pFrame;
wxLog::OnLog(wxLOG_Status, s_szBuf);
gs_pFrame = (wxFrame *) NULL;
}
}
// same as info, but only if 'verbose' mode is on
void wxLogVerbose(const char *szFormat, ...)
{
wxLog *pLog = wxLog::GetActiveTarget();
if ( pLog != NULL && pLog->GetVerbose() ) {
va_list argptr;
va_start(argptr, szFormat);
vsprintf(s_szBuf, szFormat, argptr);
va_end(argptr);
wxLog::OnLog(wxLOG_Info, s_szBuf);
}
}
// debug functions
#ifdef __WXDEBUG__
#define IMPLEMENT_LOG_DEBUG_FUNCTION(level) \
void wxLog##level(const char *szFormat, ...) \
{ \
if ( wxLog::GetActiveTarget() != NULL ) { \
va_list argptr; \
va_start(argptr, szFormat); \
vsprintf(s_szBuf, szFormat, argptr); \
va_end(argptr); \
\
wxLog::OnLog(wxLOG_##level, s_szBuf); \
} \
}
void wxLogTrace(wxTraceMask mask, const char *szFormat, ...)
{
wxLog *pLog = wxLog::GetActiveTarget();
// we check that all of mask bits are set in the current mask, so
// that wxLogTrace(wxTraceRefCount | wxTraceOle) will only do something
// if both bits are set.
if ( pLog != NULL && ((pLog->GetTraceMask() & mask) == mask) ) {
va_list argptr;
va_start(argptr, szFormat);
vsprintf(s_szBuf, szFormat, argptr);
va_end(argptr);
wxLog::OnLog(wxLOG_Trace, s_szBuf);
}
}
#else // release
#define IMPLEMENT_LOG_DEBUG_FUNCTION(level)
#endif
IMPLEMENT_LOG_DEBUG_FUNCTION(Debug)
IMPLEMENT_LOG_DEBUG_FUNCTION(Trace)
// wxLogSysError: one uses the last error code, for other you must give it
// explicitly
// common part of both wxLogSysError
void wxLogSysErrorHelper(long lErrCode)
{
char szErrMsg[LOG_BUFFER_SIZE / 2];
sprintf(szErrMsg, _(" (error %ld: %s)"), lErrCode, wxSysErrorMsg(lErrCode));
strncat(s_szBuf, szErrMsg, WXSIZEOF(s_szBuf) - strlen(s_szBuf));
wxLog::OnLog(wxLOG_Error, s_szBuf);
}
void WXDLLEXPORT wxLogSysError(const char *szFormat, ...)
{
va_list argptr;
va_start(argptr, szFormat);
vsprintf(s_szBuf, szFormat, argptr);
va_end(argptr);
wxLogSysErrorHelper(wxSysErrorCode());
}
void WXDLLEXPORT wxLogSysError(long lErrCode, const char *szFormat, ...)
{
va_list argptr;
va_start(argptr, szFormat);
vsprintf(s_szBuf, szFormat, argptr);
va_end(argptr);
wxLogSysErrorHelper(lErrCode);
}
// ----------------------------------------------------------------------------
// wxLog class implementation
// ----------------------------------------------------------------------------
wxLog::wxLog()
{
m_bHasMessages = FALSE;
m_bVerbose = FALSE;
m_szTimeFormat = "[%d/%b/%y %H:%M:%S] ";
}
wxLog *wxLog::GetActiveTarget()
{
if ( ms_bAutoCreate && ms_pLogger == NULL ) {
// prevent infinite recursion if someone calls wxLogXXX() from
// wxApp::CreateLogTarget()
static bool s_bInGetActiveTarget = FALSE;
if ( !s_bInGetActiveTarget ) {
s_bInGetActiveTarget = TRUE;
#ifdef wxUSE_NOGUI
ms_pLogger = new wxLogStderr;
#else
// ask the application to create a log target for us
if ( wxTheApp != NULL )
ms_pLogger = wxTheApp->CreateLogTarget();
else
ms_pLogger = new wxLogStderr;
#endif
s_bInGetActiveTarget = FALSE;
// do nothing if it fails - what can we do?
}
}
return ms_pLogger;
}
wxLog *wxLog::SetActiveTarget(wxLog *pLogger)
{
if ( ms_pLogger != NULL ) {
// flush the old messages before changing because otherwise they might
// get lost later if this target is not restored
ms_pLogger->Flush();
}
wxLog *pOldLogger = ms_pLogger;
ms_pLogger = pLogger;
return pOldLogger;
}
wxString wxLog::TimeStamp() const
{
wxString str;
/* Let's disable TimeStamp and see if anyone complains.
* If not, we'll remove it, since it's probably unlikely
* to ever be used. -- JACS 22/11/98
if ( !IsEmpty(m_szTimeFormat) ) {
char szBuf[128];
time_t timeNow;
struct tm *ptmNow;
time(&timeNow);
ptmNow = localtime(&timeNow);
strftime(szBuf, WXSIZEOF(szBuf), m_szTimeFormat, ptmNow);
str = szBuf;
}
*/
return str;
}
void wxLog::DoLog(wxLogLevel level, const char *szString)
{
// prepend a timestamp if not disabled
wxString str = TimeStamp();
switch ( level ) {
case wxLOG_FatalError:
DoLogString(str << _("Fatal error: ") << szString);
DoLogString(_("Program aborted."));
Flush();
abort();
break;
case wxLOG_Error:
DoLogString(str << _("Error: ") << szString);
break;
case wxLOG_Warning:
DoLogString(str << _("Warning: ") << szString);
break;
case wxLOG_Info:
if ( GetVerbose() )
case wxLOG_Message:
DoLogString(str + szString);
// fall through
case wxLOG_Status:
// nothing to do
break;
case wxLOG_Trace:
case wxLOG_Debug:
#ifdef __WXDEBUG__
// DoLogString(str << (level == wxLOG_Trace ? _("Trace") : _("Debug"))
// << ": " << szString);
// JACS: we don't really want to prefix with 'Debug'. It's just extra
// verbiage.
DoLogString(szString);
#endif
break;
default:
wxFAIL_MSG(_("unknown log level in wxLog::DoLog"));
}
}
void wxLog::DoLogString(const char *WXUNUSED(szString))
{
wxFAIL_MSG(_("DoLogString must be overrided if it's called."));
}
void wxLog::Flush()
{
// do nothing
}
// ----------------------------------------------------------------------------
// wxLogStderr class implementation
// ----------------------------------------------------------------------------
wxLogStderr::wxLogStderr(FILE *fp)
{
if ( fp == NULL )
m_fp = stderr;
else
m_fp = fp;
}
void wxLogStderr::DoLogString(const char *szString)
{
fputs(szString, m_fp);
fputc('\n', m_fp);
fflush(m_fp);
}
// ----------------------------------------------------------------------------
// wxLogStream implementation
// ----------------------------------------------------------------------------
#if wxUSE_STD_IOSTREAM
wxLogStream::wxLogStream(ostream *ostr)
{
if ( ostr == NULL )
m_ostr = &cerr;
else
m_ostr = ostr;
}
void wxLogStream::DoLogString(const char *szString)
{
(*m_ostr) << szString << endl << flush;
}
#endif
#ifndef wxUSE_NOGUI
// ----------------------------------------------------------------------------
// wxLogTextCtrl implementation
// ----------------------------------------------------------------------------
#if wxUSE_STD_IOSTREAM
wxLogTextCtrl::wxLogTextCtrl(wxTextCtrl *pTextCtrl)
// DLL mode in wxMSW, can't use it.
#if defined(NO_TEXT_WINDOW_STREAM)
#else
: wxLogStream(new ostream(pTextCtrl))
#endif
{
}
wxLogTextCtrl::~wxLogTextCtrl()
{
delete m_ostr;
}
#endif
// ----------------------------------------------------------------------------
// wxLogGui implementation
// ----------------------------------------------------------------------------
wxLogGui::wxLogGui()
{
m_bErrors = FALSE;
}
void wxLogGui::Flush()
{
if ( !m_bHasMessages )
return;
// do it right now to block any new calls to Flush() while we're here
m_bHasMessages = FALSE;
// @@@ ugly...
// concatenate all strings (but not too many to not overfill the msg box)
wxString str;
size_t nLines = 0,
nMsgCount = m_aMessages.Count();
// start from the most recent message
for ( size_t n = nMsgCount; n > 0; n-- ) {
// for Windows strings longer than this value are wrapped (NT 4.0)
const size_t nMsgLineWidth = 156;
nLines += (m_aMessages[n - 1].Len() + nMsgLineWidth - 1) / nMsgLineWidth;
if ( nLines > 25 ) // don't put too many lines in message box
break;
str << m_aMessages[n - 1] << "\n";
}
if ( m_bErrors ) {
wxMessageBox(str, _("Error"), wxOK | wxICON_EXCLAMATION);
}
else {
wxMessageBox(str, _("Information"), wxOK | wxICON_INFORMATION);
}
// no undisplayed messages whatsoever
m_bErrors = FALSE;
m_aMessages.Empty();
}
// the default behaviour is to discard all informational messages if there
// are any errors/warnings.
void wxLogGui::DoLog(wxLogLevel level, const char *szString)
{
switch ( level ) {
case wxLOG_Info:
if ( GetVerbose() )
case wxLOG_Message:
if ( !m_bErrors ) {
m_aMessages.Add(szString);
m_bHasMessages = TRUE;
}
break;
case wxLOG_Status:
{
// find the top window and set it's status text if it has any
wxFrame *pFrame = gs_pFrame;
if ( pFrame == NULL ) {
wxWindow *pWin = wxTheApp->GetTopWindow();
if ( pWin != NULL && pWin->IsKindOf(CLASSINFO(wxFrame)) ) {
pFrame = (wxFrame *)pWin;
}
}
if ( pFrame != NULL )
pFrame->SetStatusText(szString);
}
break;
case wxLOG_Trace:
case wxLOG_Debug:
#ifdef __WXDEBUG__
{
wxString strTime = TimeStamp();
#ifdef __WXMSW__
// don't prepend debug/trace here: it goes to the debug window
// anyhow, but do put a timestamp
OutputDebugString(strTime + szString + "\n\r");
#else
// send them to stderr
/*
fprintf(stderr, "%s %s: %s\n",
strTime.c_str(),
level == wxLOG_Trace ? _("Trace") : _("Debug"),
szString);
*/
fprintf(stderr, "%s\n",
szString);
fflush(stderr);
#endif
}
#endif
break;
case wxLOG_FatalError:
// show this one immediately
wxMessageBox(szString, _("Fatal error"), wxICON_HAND);
break;
case wxLOG_Error:
case wxLOG_Warning:
// discard earlier informational messages if this is the 1st error
if ( !m_bErrors ) {
m_aMessages.Empty();
m_bHasMessages = TRUE;
m_bErrors = TRUE;
}
m_aMessages.Add(szString);
break;
default:
wxFAIL_MSG(_("unknown log level in wxLogGui::DoLog"));
}
}
// ----------------------------------------------------------------------------
// wxLogWindow and wxLogFrame implementation
// ----------------------------------------------------------------------------
// log frame class
// ---------------
class wxLogFrame : public wxFrame
{
public:
// ctor & dtor
wxLogFrame(wxFrame *pParent, wxLogWindow *log, const char *szTitle);
virtual ~wxLogFrame();
// menu callbacks
void OnClose(wxCommandEvent& event);
void OnCloseWindow(wxCloseEvent& event);
void OnSave (wxCommandEvent& event);
void OnClear(wxCommandEvent& event);
void OnIdle(wxIdleEvent&);
// accessors
wxTextCtrl *TextCtrl() const { return m_pTextCtrl; }
private:
enum
{
Menu_Close = 100,
Menu_Save,
Menu_Clear
};
// instead of closing just hide the window to be able to Show() it later
void DoClose() { Show(FALSE); }
wxTextCtrl *m_pTextCtrl;
wxLogWindow *m_log;
DECLARE_EVENT_TABLE()
};
BEGIN_EVENT_TABLE(wxLogFrame, wxFrame)
// wxLogWindow menu events
EVT_MENU(Menu_Close, wxLogFrame::OnClose)
EVT_MENU(Menu_Save, wxLogFrame::OnSave)
EVT_MENU(Menu_Clear, wxLogFrame::OnClear)
EVT_CLOSE(wxLogFrame::OnCloseWindow)
END_EVENT_TABLE()
wxLogFrame::wxLogFrame(wxFrame *pParent, wxLogWindow *log, const char *szTitle)
: wxFrame(pParent, -1, szTitle)
{
m_log = log;
// @@ kludge: wxSIMPLE_BORDER is simply to prevent wxWindows from creating
// a rich edit control instead of a normal one we want in wxMSW
m_pTextCtrl = new wxTextCtrl(this, -1, wxEmptyString, wxDefaultPosition,
wxDefaultSize,
//wxSIMPLE_BORDER |
wxTE_MULTILINE |
wxHSCROLL |
wxTE_READONLY);
// create menu
wxMenuBar *pMenuBar = new wxMenuBar;
wxMenu *pMenu = new wxMenu;
pMenu->Append(Menu_Save, _("&Save..."), _("Save log contents to file"));
pMenu->Append(Menu_Clear, _("C&lear"), _("Clear the log contents"));
pMenu->AppendSeparator();
pMenu->Append(Menu_Close, _("&Close"), _("Close this window"));
pMenuBar->Append(pMenu, _("&Log"));
SetMenuBar(pMenuBar);
// status bar for menu prompts
CreateStatusBar();
m_log->OnFrameCreate(this);
}
void wxLogFrame::OnClose(wxCommandEvent& WXUNUSED(event))
{
DoClose();
}
void wxLogFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
{
DoClose();
}
void wxLogFrame::OnSave(wxCommandEvent& WXUNUSED(event))
{
// get the file name
// -----------------
const char *szFileName = wxSaveFileSelector("log", "txt", "log.txt");
if ( szFileName == NULL ) {
// cancelled
return;
}
// open file
// ---------
wxFile file;
bool bOk = FALSE;
if ( wxFile::Exists(szFileName) ) {
bool bAppend = FALSE;
wxString strMsg;
strMsg.Printf(_("Append log to file '%s' "
"(choosing [No] will overwrite it)?"), szFileName);
switch ( wxMessageBox(strMsg, _("Question"), wxYES_NO | wxCANCEL) ) {
case wxYES:
bAppend = TRUE;
break;
case wxNO:
bAppend = FALSE;
break;
case wxCANCEL:
return;
default:
wxFAIL_MSG(_("invalid message box return value"));
}
if ( bAppend ) {
bOk = file.Open(szFileName, wxFile::write_append);
}
else {
bOk = file.Create(szFileName, TRUE /* overwrite */);
}
}
else {
bOk = file.Create(szFileName);
}
// retrieve text and save it
// -------------------------
int nLines = m_pTextCtrl->GetNumberOfLines();
for ( int nLine = 0; bOk && nLine < nLines; nLine++ ) {
bOk = file.Write(m_pTextCtrl->GetLineText(nLine) + wxTextFile::GetEOL());
}
if ( bOk )
bOk = file.Close();
if ( !bOk ) {
wxLogError(_("Can't save log contents to file."));
}
else {
wxLogStatus(this, _("Log saved to the file '%s'."), szFileName);
}
}
void wxLogFrame::OnClear(wxCommandEvent& WXUNUSED(event))
{
m_pTextCtrl->Clear();
}
wxLogFrame::~wxLogFrame()
{
m_log->OnFrameDelete(this);
}
// wxLogWindow
// -----------
wxLogWindow::wxLogWindow(wxFrame *pParent,
const char *szTitle,
bool bShow,
bool bDoPass)
{
m_bPassMessages = bDoPass;
m_pLogFrame = new wxLogFrame(pParent, this, szTitle);
m_pOldLog = wxLog::SetActiveTarget(this);
if ( bShow )
m_pLogFrame->Show(TRUE);
}
void wxLogWindow::Show(bool bShow)
{
m_pLogFrame->Show(bShow);
}
void wxLogWindow::Flush()
{
if ( m_pOldLog != NULL )
m_pOldLog->Flush();
m_bHasMessages = FALSE;
}
void wxLogWindow::DoLog(wxLogLevel level, const char *szString)
{
// first let the previous logger show it
if ( m_pOldLog != NULL && m_bPassMessages ) {
// @@@ why can't we access protected wxLog method from here (we derive
// from wxLog)? gcc gives "DoLog is protected in this context", what
// does this mean? Anyhow, the cast is harmless and let's us do what
// we want.
((wxLogWindow *)m_pOldLog)->DoLog(level, szString);
}
if ( m_pLogFrame ) {
switch ( level ) {
case wxLOG_Status:
// by default, these messages are ignored by wxLog, so process
// them ourselves
{
wxString str = TimeStamp();
str << _("Status: ") << szString;
DoLogString(str);
}
break;
// don't put trace messages in the text window for 2 reasons:
// 1) there are too many of them
// 2) they may provoke other trace messages thus sending a program
// into an infinite loop
case wxLOG_Trace:
break;
default:
// and this will format it nicely and call our DoLogString()
wxLog::DoLog(level, szString);
}
}
m_bHasMessages = TRUE;
}
void wxLogWindow::DoLogString(const char *szString)
{
// put the text into our window
wxTextCtrl *pText = m_pLogFrame->TextCtrl();
// remove selection (WriteText is in fact ReplaceSelection)
#ifdef __WXMSW__
long nLen = pText->GetLastPosition();
pText->SetSelection(nLen, nLen);
#endif // Windows
pText->WriteText(szString);
pText->WriteText("\n"); // "\n" ok here (_not_ "\r\n")
// TODO ensure that the line can be seen
}
wxFrame *wxLogWindow::GetFrame() const
{
return m_pLogFrame;
}
void wxLogWindow::OnFrameCreate(wxFrame * WXUNUSED(frame))
{
}
void wxLogWindow::OnFrameDelete(wxFrame * WXUNUSED(frame))
{
m_pLogFrame = (wxLogFrame *)NULL;
}
wxLogWindow::~wxLogWindow()
{
delete m_pOldLog;
// may be NULL if log frame already auto destroyed itself
delete m_pLogFrame;
}
#endif //wxUSE_NOGUI
// ============================================================================
// Global functions/variables
// ============================================================================
// ----------------------------------------------------------------------------
// static variables
// ----------------------------------------------------------------------------
wxLog *wxLog::ms_pLogger = (wxLog *) NULL;
bool wxLog::ms_doLog = TRUE;
bool wxLog::ms_bAutoCreate = TRUE;
wxTraceMask wxLog::ms_ulTraceMask = (wxTraceMask)0;
// ----------------------------------------------------------------------------
// stdout error logging helper
// ----------------------------------------------------------------------------
// helper function: wraps the message and justifies it under given position
// (looks more pretty on the terminal). Also adds newline at the end.
//
// @@ this is now disabled until I find a portable way of determining the
// terminal window size (ok, I found it but does anybody really cares?)
#ifdef LOG_PRETTY_WRAP
static void wxLogWrap(FILE *f, const char *pszPrefix, const char *psz)
{
size_t nMax = 80; // @@@@
size_t nStart = strlen(pszPrefix);
fputs(pszPrefix, f);
size_t n;
while ( *psz != '\0' ) {
for ( n = nStart; (n < nMax) && (*psz != '\0'); n++ )
putc(*psz++, f);
// wrapped?
if ( *psz != '\0' ) {
/*putc('\n', f);*/
for ( n = 0; n < nStart; n++ )
putc(' ', f);
// as we wrapped, squeeze all white space
while ( isspace(*psz) )
psz++;
}
}
putc('\n', f);
}
#endif //LOG_PRETTY_WRAP
// ----------------------------------------------------------------------------
// error code/error message retrieval functions
// ----------------------------------------------------------------------------
// get error code from syste
unsigned long wxSysErrorCode()
{
#ifdef __WXMSW__
#ifdef __WIN32__
return ::GetLastError();
#else //WIN16
// @@@@ what to do on Windows 3.1?
return 0;
#endif //WIN16/32
#else //Unix
return errno;
#endif //Win/Unix
}
// get error message from system
const char *wxSysErrorMsg(unsigned long nErrCode)
{
if ( nErrCode == 0 )
nErrCode = wxSysErrorCode();
#ifdef __WXMSW__
#ifdef __WIN32__
static char s_szBuf[LOG_BUFFER_SIZE / 2];
// get error message from system
LPVOID lpMsgBuf;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, nErrCode,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)&lpMsgBuf,
0, NULL);
// copy it to our buffer and free memory
strncpy(s_szBuf, (const char *)lpMsgBuf, WXSIZEOF(s_szBuf) - 1);
s_szBuf[WXSIZEOF(s_szBuf) - 1] = '\0';
LocalFree(lpMsgBuf);
// returned string is capitalized and ended with '\r\n' - bad
s_szBuf[0] = (char)wxToLower(s_szBuf[0]);
size_t len = strlen(s_szBuf);
if ( len > 0 ) {
// truncate string
if ( s_szBuf[len - 2] == '\r' )
s_szBuf[len - 2] = '\0';
}
return s_szBuf;
#else //Win16
// TODO @@@@
return NULL;
#endif // Win16/32
#else // Unix
return strerror(nErrCode);
#endif // Win/Unix
}
// ----------------------------------------------------------------------------
// debug helper
// ----------------------------------------------------------------------------
#ifdef __WXDEBUG__
void Trap()
{
#ifdef __WXMSW__
DebugBreak();
#elif defined(__WXSTUBS__)
// TODO
#elif defined(__WXMAC__)
#if __powerc
Debugger();
#else
SysBreak();
#endif
#else // Unix
raise(SIGTRAP);
#endif // Win/Unix
}
// this function is called when an assert fails
void wxOnAssert(const char *szFile, int nLine, const char *szMsg)
{
// this variable can be set to true to suppress "assert failure" messages
static bool s_bNoAsserts = FALSE;
static bool s_bInAssert = FALSE;
if ( s_bInAssert ) {
// He-e-e-e-elp!! we're trapped in endless loop
Trap();
return;
}
s_bInAssert = TRUE;
char szBuf[LOG_BUFFER_SIZE];
sprintf(szBuf, _("Assert failed in file %s at line %d"), szFile, nLine);
if ( szMsg != NULL ) {
strcat(szBuf, ": ");
strcat(szBuf, szMsg);
}
else {
strcat(szBuf, ".");
}
if ( !s_bNoAsserts ) {
// send it to the normal log destination
wxLogDebug(szBuf);
#ifdef wxUSE_NOGUI
Trap();
#else
strcat(szBuf, _("\nDo you want to stop the program?"
"\nYou can also choose [Cancel] to suppress "
"further warnings."));
switch ( wxMessageBox(szBuf, _("Debug"),
wxYES_NO | wxCANCEL | wxICON_STOP ) ) {
case wxYES:
Trap();
break;
case wxCANCEL:
s_bNoAsserts = TRUE;
break;
//case wxNO: nothing to do
}
#endif // USE_NOGUI
}
s_bInAssert = FALSE;
}
#endif //WXDEBUG
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