Initial source commit

minorGems/util/log/FileLog.cpp

@@ -0,0 +1,146 @@
+/*
+ * 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 );
+    }
+
+
+
+
+
+
+
+
+