www.pudn.com > MP3CORD.rar > log.cpp

/*____________________________________________________________________________ 
         
        FreeAmp - The Free MP3 Player 
 
        Portions Copyright (C) 1998-1999 EMusic.com 
 
        This program is free software; you can redistribute it and/or modify 
        it under the terms of the GNU General Public License as published by 
        the Free Software Foundation; either version 2 of the License, or 
        (at your option) any later version. 
 
        This program is distributed in the hope that it will be useful, 
        but WITHOUT ANY WARRANTY; without even the implied warranty of 
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
        GNU General Public License for more details. 
 
        You should have received a copy of the GNU General Public License 
        along with this program; if not, Write to the Free Software 
        Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 
         
        $Id: log.cpp,v 1.6 1999/10/19 07:12:46 elrod Exp $ 
____________________________________________________________________________*/ 
#include  
#include  
#include  
#include  
#include  
 
#include "log.h" 
 
const int iMaxLogLineLen = 2048; 
const char *szLogLevelNames[] =  
{ 
    "Main", 
    "Decode", 
    "Input", 
    "Output", 
    "Perf" 
}; 
 
LogFile::LogFile(char *m_szLogFileArg) 
{ 
    m_szLogFile = strdup(m_szLogFileArg); 
    m_fpLog = NULL; 
 
    // Log nothing but errors on default 
    m_iLogLevelFlags = 0x0; 
} 
 
LogFile::~LogFile(void) 
{ 
    if (m_fpLog) 
       fclose(m_fpLog); 
	if (m_szLogFile) 
	   free(m_szLogFile); 
} 
 
bool LogFile::Open(void) 
{ 
    m_fpLog = fopen(m_szLogFile, "a"); 
    if (m_fpLog == NULL) 
       printf("Cannot open logfile freeamp.log\n"); 
 
    return m_fpLog != NULL; 
} 
 
bool LogFile::Close(void) 
{ 
    if (m_fpLog == NULL) 
        return false; 
    else 
    { 
        fclose(m_fpLog); 
        m_fpLog = NULL; 
    } 
 
    return true; 
} 
 
void LogFile::AddLogLevel(int iLogLevelFlags) 
{ 
    if (iLogLevelFlags < 0 || iLogLevelFlags >= LogLast) 
       return; 
 
    m_iLogLevelFlags |= 1 << iLogLevelFlags; 
} 
 
void LogFile::Error(char *format, ...) 
{ 
    char *szBuffer; 
    va_list argptr; 
 
    if (m_fpLog == NULL) 
       return; 
 
    szBuffer = new char[iMaxLogLineLen]; 
 
    va_start(argptr, format); 
    vsprintf(szBuffer, format, argptr); 
    va_end(argptr); 
 
    fprintf(m_fpLog, "Error: %s", szBuffer); 
    fflush(m_fpLog); 
 
    delete szBuffer; 
} 
 
void LogFile::Log(int iLogLevel, char *format, ...) 
{ 
    char *szBuffer; 
    va_list argptr; 
 
    if (m_fpLog == NULL || (m_iLogLevelFlags & ( 1 << iLogLevel)) == 0) 
       return; 
 
    szBuffer = new char[iMaxLogLineLen]; 
 
    va_start(argptr, format); 
    vsprintf(szBuffer, format, argptr); 
    va_end(argptr); 
 
    fprintf(m_fpLog, "%s: %s", szLogLevelNames[iLogLevel], szBuffer); 
    fflush(m_fpLog); 
 
    delete szBuffer; 
}