Source code of Windows XP (NT5)
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//=======================================================================
//
// Copyright (c) 1998-1999 Microsoft Corporation. All Rights Reserved.
//
// File: log.h
//
// Original Author: Yan Leshinsky
//
// Description:
//
// Logging support
//
//=======================================================================
#pragma once
#include <stdio.h>
#if 1
#ifndef LOGGING_LEVEL
#define LOGGING_LEVEL 0
#endif
const DWORD MAX_FORMATTED_STRING = 1024;
class CLogger
{
public:
CLogger(const char* szBlockName = 0, int nLoggingLevel = 0, const char* szFileName = 0, int nLine = 0);
~CLogger();
void __cdecl out(const char *szFormat, ...);
void __cdecl error(const char *szFormat, ...);
static void __cdecl out1(const char *szFormat, ...);
private:
void v_out( const char* szFormat, va_list va);
bool m_fOut;
char m_szBlockName[64];
DWORD m_dwStartTick;
static FILE* c_pfile;
static int c_cnIndent;
static int c_cnLevels;
};
#define THIS_FILE __FILE__
#define LOG_block(name) CLogger logger(name, LOGGING_LEVEL, THIS_FILE, __LINE__)
#define LOG_out logger.out
#define LOG_out1 CLogger::out1
#define LOG_error logger.error
#ifdef _UNICODE
#define return_if_false(f) if (f) {/*OK*/} else { LOG_error("%S LastError = %d", #f, GetLastError()); return false;}
#define return_error_if_false(f) if (f) {/*OK*/} else { DWORD dwErr = GetLastError(); LOG_error("%S LastError = %d", #f, dwErr); return dwErr;}
#define return_if_error(f) { DWORD dwErr = f; if (dwErr) { LOG_error("%S LastError = %d", #f, dwErr); return dwErr;} }
#else
#define return_if_false(f) if (f) {/*OK*/} else { LOG_error("%s LastError = %d", #f, GetLastError()); return false;}
#define return_error_if_false(f) if (f) {/*OK*/} else { DWORD dwErr = GetLastError(); LOG_error("%s LastError = %d", #f, dwErr); return dwErr;}
#define return_if_error(f) { DWORD dwErr = f; if (dwErr) { LOG_error("%s LastError = %d", #f, dwErr); return dwErr;} }
#endif
#else
#define LOG_block(name)
inline void __cdecl ___LOG(const char *szFormat, ...){}
#define LOG_out true ? (void)0 : ___LOG
#define LOG_out1 true ? (void)0 : ___LOG
#define LOG_error true ? (void)0 : ___LOG
#define return_if_false(f) if (f) {/*OK*/} else { return false;}
#define return_error_if_false(f) if (f) {/*OK*/} else { return GetLastError(); }
#define return_if_error(f) { DWORD dwErr = f; if (dwErr) { return dwErr;} }
#endif
#define tab_out(){if(c_pfile){ for(int i = 0; i < c_cnIndent; i ++) {_fputtc(_T('\t'),c_pfile);}}}