C++记录debug信息的log类

取自：http://www.viksoe.dk/code/all_mfc.htm，里面有各种MFC常用的类

// LogFile.h: interface for the CLogFile class.
//
// Written by Bjarke Viksoe (bjarke@viksoe.dk)
// Copyright (c) 2000.
//
// This code may be used in compiled form in any way you desire. This
// file may be redistributed by any means PROVIDING it is 
// not sold for profit without the authors written consent, and 
// providing that this notice and the authors name is included. 
//
// This file is provided "as is" with no expressed or implied warranty.
// The author accepts no liability if it causes any damage to you or your
// computer whatsoever. It's free, so don't hassle me about it.
//
// Beware of bugs.
////////////////////////////////////////////////////////////////////////

#if !defined(AFX_LOGFILE_H__0EE45201_E8F9_11D1_93C1_241C08C10000__INCLUDED_)
#define AFX_LOGFILE_H__0EE45201_E8F9_11D1_93C1_241C08C10000__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

// A small class implementing a debug log file.
class CLogFile : public CObject  
{
public:
   CLogFile();
   CLogFile(LPCTSTR Filename);
   virtual ~CLogFile();

// Methods
public:
   // Creates (removes previous) log file.
   RETCODE Create(LPCTSTR Filename, LPCTSTR Text);
   // Set the filename of the log fil to use.
   RETCODE SetFilename(LPCTSTR Filename);
   // Creates or appends to an exisiting log file.
   RETCODE AppendText(LPCTSTR Text, ...);
   // Writes System Information to the log
   RETCODE LogSystemInformation();

// Variables
protected:
   CString m_Filename;     // The log file we're currently writing to.
};

#endif // !defined(AFX_LOGFILE_H__0EE45201_E8F9_11D1_93C1_241C08C10000__INCLUDED_)

LogFile.cpp

  1 // LogFile.cpp: implementation of the CLogFile class.
  2 //
  3 // A small class which can be used for debug logs.
  4 //
  5 //////////////////////////////////////////////////////////////////////
  6 
  7 #include "stdafx.h"
  8 #include "LogFile.h"
  9 
 10 #ifdef _DEBUG
 11 #undef THIS_FILE
 12 static char THIS_FILE[]=__FILE__;
 13 #define new DEBUG_NEW
 14 #endif
 15 
 16 //////////////////////////////////////////////////////////////////////
 17 // Construction/Destruction
 18 //////////////////////////////////////////////////////////////////////
 19 
 20 CLogFile::CLogFile()
 21 {
 22 }
 23 
 24 CLogFile::CLogFile(LPCTSTR Filename)
 25 {
 26    SetFilename( Filename );
 27 }
 28 
 29 CLogFile::~CLogFile()
 30 {
 31 }
 32 
 33 
 34 //////////////////////////////////////////////////////////////////////
 35 // Methods
 36 //////////////////////////////////////////////////////////////////////
 37 
 38 RETCODE CLogFile::Create(LPCTSTR Filename, LPCTSTR Text)
 39 {
 40    ASSERT( Filename );
 41    ASSERT( Text );
 42    m_Filename = Filename;
 43    ASSERT( !m_Filename.IsEmpty() );
 44    if( m_Filename.IsEmpty() ) return RET_INVALIDARGS;
 45    // Write text to (text)file
 46    CStdioFile f;
 47    TRY 
 48    {
 49       BOOL res = f.Open( Filename, CFile::modeCreate|CFile::modeWrite|CFile::typeText );
 50       if( res ) {
 51          f.WriteString( Text );
 52          f.WriteString( _T("
") );
 53          f.Close();
 54       };
 55    }
 56    CATCH_ALL(e) 
 57    {
 58       f.Abort();
 59 #ifdef _DEBUG
 60       e->ReportError();
 61 #endif
 62       return RET_ERROR;
 63    }
 64    END_CATCH_ALL;
 65    return RET_OK;
 66 };
 67 
 68 RETCODE CLogFile::AppendText(LPCTSTR Text, ...)
 69 {
 70    ASSERT(AfxIsValidString(Text));
 71    ASSERT(!m_Filename.IsEmpty());
 72    if( m_Filename.IsEmpty() ) return RET_NOTINITIALIZED;
 73    // Append text to (text)file
 74    CStdioFile f;
 75    CString sText;
 76    va_list args;   
 77    va_start(args, Text);   
 78    sText.FormatV(Text, args);
 79    TRY 
 80    {
 81       BOOL res = f.Open( m_Filename, CFile::modeCreate|CFile::modeNoTruncate|CFile::modeWrite|CFile::typeText );
 82       if( res ) {
 83          f.SeekToEnd();
 84          f.WriteString( sText );
 85          f.WriteString( _T("
") );
 86          f.Close();
 87       };
 88    }
 89    CATCH_ALL(e) 
 90    {
 91       f.Abort();
 92 #ifdef _DEBUG
 93       e->ReportError();
 94 #endif
 95       return RET_FILEERROR;
 96    }
 97    END_CATCH_ALL;
 98    return RET_OK;
 99 };
100 
101 RETCODE CLogFile::SetFilename(LPCTSTR Filename)
102 // Sets the log filename.  A new log file will
103 // be created if the file does not exist.
104 {
105    ASSERT(AfxIsValidString(Filename));
106    m_Filename = Filename;
107    if( m_Filename.IsEmpty() ) return RET_INVALIDARGS;
108    return RET_OK;
109 }
110 
111 RETCODE CLogFile::LogSystemInformation()
112 // Write some standard system information to
113 // the log file.
114 {
115    ASSERT(!m_Filename.IsEmpty());
116    if( m_Filename.IsEmpty() ) return RET_NOTINITIALIZED;
117 
118    SYSTEMTIME time;
119    ::GetLocalTime( &time );
120    AppendText(_T("Date: %04d-%02d-%02d Time: %02d:%02d:%02d"),
121               time.wYear,time.wMonth,time.wDay,time.wHour,time.wMinute,time.wSecond);
122 
123    OSVERSIONINFO verinfo;
124    verinfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
125    ::GetVersionEx(&verinfo);
126    AppendText(_T("Win%s Version %d.%.2d (build %d) %s
"), 
127       (verinfo.dwPlatformId==VER_PLATFORM_WIN32_NT ? _T("NT") : _T("32")),
128       verinfo.dwMajorVersion,
129       verinfo.dwMinorVersion,
130       verinfo.dwBuildNumber,
131       verinfo.szCSDVersion);
132   
133    SYSTEM_INFO sysinfo; 
134    LPCTSTR pszProcessor; 
135    ::GetSystemInfo(&sysinfo); 
136    switch( sysinfo.dwProcessorType ) { 
137    case PROCESSOR_INTEL_386: 
138    case PROCESSOR_INTEL_486: 
139    case PROCESSOR_INTEL_PENTIUM: 
140       pszProcessor = _T("Intel "); 
141       break; 
142    case PROCESSOR_MIPS_R4000: 
143       pszProcessor = _T("MIPS R"); 
144       break; 
145    case PROCESSOR_ALPHA_21064: 
146       pszProcessor = _T("DEC Alpha "); 
147       break; 
148    default: 
149       pszProcessor = _T("Chipset "); 
150       break; 
151    } 
152    return AppendText(_T("%s%d, %d Processor(s)
"), 
153       (LPCTSTR)pszProcessor, 
154       sysinfo.dwProcessorType, 
155       sysinfo.dwNumberOfProcessors);
156 };