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/*
* Modification History
*
* 2002-February-25 Jason Rohrer
* Created.
*
* 2002-March-13 Jason Rohrer
* Added a flush after every write.
*
* 2002-April-8 Jason Rohrer
* Changed to be thread-safe.
*
* 2002-November-5 Jason Rohrer
* Added support for backing up logs and deleting old log data.
*
* 2010-May-14 Jason Rohrer
* String parameters as const to fix warnings.
*/
#include "FileLog.h"
#include "PrintLog.h"
#include "minorGems/util/stringUtils.h"
#include "minorGems/io/file/File.h"
#include <stdio.h>
#include <time.h>
const char *FileLog::mDefaultLogFileName = "default.log";
FileLog::FileLog( const char *inFileName, unsigned long inSecondsBetweenBackups )
: mLogFile( NULL ),
mLogFileName( stringDuplicate( inFileName ) ),
mSecondsBetweenBackups( inSecondsBetweenBackups ),
mTimeOfLastBackup( time( NULL ) ) {
mLogFile = fopen( mLogFileName, "a" );
if( mLogFile == NULL ) {
printf( "Log file %s failed to open.\n", mLogFileName );
printf( "Writing log to default file: %s\n",
mDefaultLogFileName );
// switch to default log file name
delete [] mLogFileName;
mLogFileName = stringDuplicate( mDefaultLogFileName );
mLogFile = fopen( mLogFileName, "a" );
if( mLogFile == NULL ) {
printf( "Default log file %s failed to open.\n",
mLogFileName );
}
}
}
FileLog::~FileLog() {
if( mLogFile != NULL ) {
fclose( mLogFile );
}
delete [] mLogFileName;
}
void FileLog::logString( const char *inLoggerName, const char *inString,
int inLevel ) {
if( mLogFile != NULL ) {
if( inLevel <= mLoggingLevel ) {
char *message = PrintLog::generateLogMessage( inLoggerName,
inString,
inLevel );
mLock->lock();
fprintf( mLogFile, "%s\n", message );
fflush( mLogFile );
if( time( NULL ) - mTimeOfLastBackup > mSecondsBetweenBackups ) {
makeBackup();
}
mLock->unlock();
delete [] message;
}
}
}
void FileLog::makeBackup() {
fclose( mLogFile );
File *currentLogFile = new File( NULL, mLogFileName );
char *backupFileName = new char[ strlen( mLogFileName ) + 10 ];
sprintf( backupFileName, "%s.backup", mLogFileName );
File *backupLogFile = new File( NULL, backupFileName );
delete [] backupFileName;
// copy into backup log file, which will overwrite it
currentLogFile->copy( backupLogFile );
delete currentLogFile;
delete backupLogFile;
// clear main log file and start writing to it again
mLogFile = fopen( mLogFileName, "w" );
if( mLogFile == NULL ) {
printf( "Log file %s failed to open.\n", mLogFileName );
}
mTimeOfLastBackup = time( NULL );
}
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