log.cpp
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CPP
841 行
/////////////////////////////////////////////////////////////////////////////
// Name: log.cpp
// Purpose: Assorted wxLogXXX functions, and wxLog (sink for logs)
// Author: Vadim Zeitlin
// Modified by:
// Created: 29/01/98
// RCS-ID: $Id: log.cpp,v 1.161.2.1 2006/01/18 13:20:40 JS Exp $
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "log.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_LOG
// wxWidgets
#ifndef WX_PRECOMP
#include "wx/app.h"
#include "wx/arrstr.h"
#include "wx/intl.h"
#include "wx/string.h"
#endif //WX_PRECOMP
#include "wx/apptrait.h"
#include "wx/file.h"
#include "wx/log.h"
#include "wx/msgout.h"
#include "wx/textfile.h"
#include "wx/thread.h"
#include "wx/utils.h"
#include "wx/wxchar.h"
// other standard headers
#ifndef __WXWINCE__
#include <errno.h>
#endif
#include <stdlib.h>
#ifndef __WXWINCE__
#include <time.h>
#else
#include "wx/msw/wince/time.h"
#endif
#if defined(__WINDOWS__)
#include "wx/msw/private.h" // includes windows.h
#endif
// ----------------------------------------------------------------------------
// 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
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// globals
// ----------------------------------------------------------------------------
// 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
static wxChar s_szBufStatic[LOG_BUFFER_SIZE];
static wxChar *s_szBuf = s_szBufStatic;
static size_t s_szBufSize = WXSIZEOF( s_szBufStatic );
#if wxUSE_THREADS
// the critical section protecting the static buffer
static wxCriticalSection gs_csLogBuf;
#endif // wxUSE_THREADS
// return true if we have a non NULL non disabled log target
static inline bool IsLoggingEnabled()
{
return wxLog::IsEnabled() && (wxLog::GetActiveTarget() != NULL);
}
// ----------------------------------------------------------------------------
// 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.
// ----------------------------------------------------------------------------
// wrapper for wxVsnprintf(s_szBuf) which always NULL-terminates it
static inline void PrintfInLogBug(const wxChar *szFormat, va_list argptr)
{
if ( wxVsnprintf(s_szBuf, s_szBufSize, szFormat, argptr) < 0 )
{
// must NUL-terminate it manually
s_szBuf[s_szBufSize - 1] = _T('\0');
}
//else: NUL-terminated by vsnprintf()
}
// generic log function
void wxVLogGeneric(wxLogLevel level, const wxChar *szFormat, va_list argptr)
{
if ( IsLoggingEnabled() ) {
wxCRIT_SECT_LOCKER(locker, gs_csLogBuf);
PrintfInLogBug(szFormat, argptr);
wxLog::OnLog(level, s_szBuf, time(NULL));
}
}
void wxLogGeneric(wxLogLevel level, const wxChar *szFormat, ...)
{
va_list argptr;
va_start(argptr, szFormat);
wxVLogGeneric(level, szFormat, argptr);
va_end(argptr);
}
#define IMPLEMENT_LOG_FUNCTION(level) \
void wxVLog##level(const wxChar *szFormat, va_list argptr) \
{ \
if ( IsLoggingEnabled() ) { \
wxCRIT_SECT_LOCKER(locker, gs_csLogBuf); \
\
PrintfInLogBug(szFormat, argptr); \
\
wxLog::OnLog(wxLOG_##level, s_szBuf, time(NULL)); \
} \
} \
\
void wxLog##level(const wxChar *szFormat, ...) \
{ \
va_list argptr; \
va_start(argptr, szFormat); \
wxVLog##level(szFormat, argptr); \
va_end(argptr); \
}
IMPLEMENT_LOG_FUNCTION(Error)
IMPLEMENT_LOG_FUNCTION(Warning)
IMPLEMENT_LOG_FUNCTION(Message)
IMPLEMENT_LOG_FUNCTION(Info)
IMPLEMENT_LOG_FUNCTION(Status)
void wxSafeShowMessage(const wxString& title, const wxString& text)
{
#ifdef __WINDOWS__
::MessageBox(NULL, text, title, MB_OK | MB_ICONSTOP);
#else
wxFprintf(stderr, _T("%s: %s\n"), title.c_str(), text.c_str());
#endif
}
// fatal errors can't be suppressed nor handled by the custom log target and
// always terminate the program
void wxVLogFatalError(const wxChar *szFormat, va_list argptr)
{
wxVsnprintf(s_szBuf, s_szBufSize, szFormat, argptr);
wxSafeShowMessage(_T("Fatal Error"), s_szBuf);
#ifdef __WXWINCE__
ExitThread(3);
#else
abort();
#endif
}
void wxLogFatalError(const wxChar *szFormat, ...)
{
va_list argptr;
va_start(argptr, szFormat);
wxVLogFatalError(szFormat, argptr);
// some compilers warn about unreachable code and it shouldn't matter
// for the others anyhow...
//va_end(argptr);
}
// same as info, but only if 'verbose' mode is on
void wxVLogVerbose(const wxChar *szFormat, va_list argptr)
{
if ( IsLoggingEnabled() ) {
if ( wxLog::GetActiveTarget() != NULL && wxLog::GetVerbose() ) {
wxCRIT_SECT_LOCKER(locker, gs_csLogBuf);
wxVsnprintf(s_szBuf, s_szBufSize, szFormat, argptr);
wxLog::OnLog(wxLOG_Info, s_szBuf, time(NULL));
}
}
}
void wxLogVerbose(const wxChar *szFormat, ...)
{
va_list argptr;
va_start(argptr, szFormat);
wxVLogVerbose(szFormat, argptr);
va_end(argptr);
}
// debug functions
#ifdef __WXDEBUG__
#define IMPLEMENT_LOG_DEBUG_FUNCTION(level) \
void wxVLog##level(const wxChar *szFormat, va_list argptr) \
{ \
if ( IsLoggingEnabled() ) { \
wxCRIT_SECT_LOCKER(locker, gs_csLogBuf); \
\
wxVsnprintf(s_szBuf, s_szBufSize, szFormat, argptr); \
\
wxLog::OnLog(wxLOG_##level, s_szBuf, time(NULL)); \
} \
} \
void wxLog##level(const wxChar *szFormat, ...) \
{ \
va_list argptr; \
va_start(argptr, szFormat); \
wxVLog##level(szFormat, argptr); \
va_end(argptr); \
}
void wxVLogTrace(const wxChar *mask, const wxChar *szFormat, va_list argptr)
{
if ( IsLoggingEnabled() && wxLog::IsAllowedTraceMask(mask) ) {
wxCRIT_SECT_LOCKER(locker, gs_csLogBuf);
wxChar *p = s_szBuf;
size_t len = s_szBufSize;
wxStrncpy(s_szBuf, _T("("), len);
len -= 1; // strlen("(")
p += 1;
wxStrncat(p, mask, len);
size_t lenMask = wxStrlen(mask);
len -= lenMask;
p += lenMask;
wxStrncat(p, _T(") "), len);
len -= 2;
p += 2;
wxVsnprintf(p, len, szFormat, argptr);
wxLog::OnLog(wxLOG_Trace, s_szBuf, time(NULL));
}
}
void wxLogTrace(const wxChar *mask, const wxChar *szFormat, ...)
{
va_list argptr;
va_start(argptr, szFormat);
wxVLogTrace(mask, szFormat, argptr);
va_end(argptr);
}
void wxVLogTrace(wxTraceMask mask, const wxChar *szFormat, va_list argptr)
{
// 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 ( IsLoggingEnabled() && ((wxLog::GetTraceMask() & mask) == mask) ) {
wxCRIT_SECT_LOCKER(locker, gs_csLogBuf);
wxVsnprintf(s_szBuf, s_szBufSize, szFormat, argptr);
wxLog::OnLog(wxLOG_Trace, s_szBuf, time(NULL));
}
}
void wxLogTrace(wxTraceMask mask, const wxChar *szFormat, ...)
{
va_list argptr;
va_start(argptr, szFormat);
wxVLogTrace(mask, szFormat, argptr);
va_end(argptr);
}
#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)
{
wxChar szErrMsg[LOG_BUFFER_SIZE / 2];
wxSnprintf(szErrMsg, WXSIZEOF(szErrMsg),
_(" (error %ld: %s)"), lErrCode, wxSysErrorMsg(lErrCode));
wxStrncat(s_szBuf, szErrMsg, s_szBufSize - wxStrlen(s_szBuf));
wxLog::OnLog(wxLOG_Error, s_szBuf, time(NULL));
}
void WXDLLEXPORT wxVLogSysError(const wxChar *szFormat, va_list argptr)
{
if ( IsLoggingEnabled() ) {
wxCRIT_SECT_LOCKER(locker, gs_csLogBuf);
wxVsnprintf(s_szBuf, s_szBufSize, szFormat, argptr);
wxLogSysErrorHelper(wxSysErrorCode());
}
}
void WXDLLEXPORT wxLogSysError(const wxChar *szFormat, ...)
{
va_list argptr;
va_start(argptr, szFormat);
wxVLogSysError(szFormat, argptr);
va_end(argptr);
}
void WXDLLEXPORT wxVLogSysError(long lErrCode, const wxChar *szFormat, va_list argptr)
{
if ( IsLoggingEnabled() ) {
wxCRIT_SECT_LOCKER(locker, gs_csLogBuf);
wxVsnprintf(s_szBuf, s_szBufSize, szFormat, argptr);
wxLogSysErrorHelper(lErrCode);
}
}
void WXDLLEXPORT wxLogSysError(long lErrCode, const wxChar *szFormat, ...)
{
va_list argptr;
va_start(argptr, szFormat);
wxVLogSysError(lErrCode, szFormat, argptr);
va_end(argptr);
}
// ----------------------------------------------------------------------------
// wxLog class implementation
// ----------------------------------------------------------------------------
wxChar *wxLog::SetLogBuffer( wxChar *buf, size_t size)
{
wxChar *oldbuf = s_szBuf;
if( buf == 0 )
{
s_szBuf = s_szBufStatic;
s_szBufSize = WXSIZEOF( s_szBufStatic );
}
else
{
s_szBuf = buf;
s_szBufSize = size;
}
return (oldbuf == s_szBufStatic ) ? 0 : oldbuf;
}
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;
// ask the application to create a log target for us
if ( wxTheApp != NULL )
ms_pLogger = wxTheApp->GetTraits()->CreateLogTarget();
else
ms_pLogger = new wxLogStderr;
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;
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