version 2.2.0

remove deprecated members
PIVariantTypes::File add "is_save" flag
PIBinaryLog clear

lib/main/io_devices/pibinarylog.h

@@ -25,14 +25,7 @@
 
 #include "pifile.h"
 
-#define PIBINARYLOG_VERSION 0x32
-namespace __S__PIBinaryLog {
-static const uchar binlog_sig[] = {'B','I','N','L','O','G'};
-}
-#define PIBINARYLOG_SIGNATURE_SIZE sizeof(__S__PIBinaryLog::binlog_sig)
 
-/// TODO: Create static functions to join binlog files
-/// TODO: Create functions to insert and delete records
 class PIP_EXPORT PIBinaryLog: public PIIODevice
 {
 	PIIODEVICE(PIBinaryLog)
@@ -196,7 +189,7 @@ public:
 	bool isEnd() const {if (isClosed()) return true; return file.isEnd();}
 	
 	//! Returns if BinLog file is empty
-	bool isEmpty() const {return (log_size <= llong(PIBINARYLOG_SIGNATURE_SIZE + 1));}
+	bool isEmpty() const;
 
 	//! Returns BinLog pause status
 	bool isPause() const {return is_pause;}