binlog user header

lib/main/io_devices/pibinarylog.cpp

@@ -21,6 +21,8 @@
 #include "pidir.h"
 #include "pipropertystorage.h"
 
+#define PIBINARYLOG_VERSION_OLD 0x31
+
 /*! \class PIBinaryLog
  * \brief Class for read and write binary data to logfile, and playback this data in realtime, or custom speed
  *
@@ -356,6 +358,16 @@ int PIBinaryLog::readBinLog(int id, void *read_to, int max_size, PISystemTime *
 }
 
 
+void PIBinaryLog::setHeader(const PIByteArray & header) {
+	user_header = header;
+}
+
+
+PIByteArray PIBinaryLog::getHeader() {
+	return user_header_readed;
+}
+
+
 int PIBinaryLog::readDevice(void *read_to, int max_size) {
 	if (lastrecord.id == -1 || isEnd()) return 0;
 	if(!is_thread_ok && lastrecord.id > 0) return lastrecord.data.size();
@@ -405,12 +417,16 @@ bool PIBinaryLog::writeFileHeader() {
 	if (file.write(&__S__PIBinaryLog::binlog_sig, PIBINARYLOG_SIGNATURE_SIZE) <= 0) return false;
 	uchar version = PIBINARYLOG_VERSION;
 	if (file.write(&version, 1) <= 0) return false;
+	uint32_t sz = user_header.size();
+	file.write(&sz, 4);
+	file.write(user_header);
 	file.flush();
 	return true;
 }
 
 
 bool PIBinaryLog::checkFileHeader() {
+	user_header_readed.clear();
 	uchar read_sig[PIBINARYLOG_SIGNATURE_SIZE];
 	for (uint i=0; i<PIBINARYLOG_SIGNATURE_SIZE; i++) read_sig[i] = 0;
 	if (file.read(read_sig, PIBINARYLOG_SIGNATURE_SIZE) < 0) return false;
@@ -423,8 +439,17 @@ bool PIBinaryLog::checkFileHeader() {
 	}
 	uchar read_version = 0;
 	if (file.read(&read_version, 1) < 0) return false;
+	if (read_version == PIBINARYLOG_VERSION_OLD) {
+		log_size = file.size();
+		return true;
+	}
 	if (read_version == PIBINARYLOG_VERSION) {
 		log_size = file.size();
+		uint32_t sz = 0;
+		file.read(&sz, 4);
+		if (sz > 0) {
+			user_header_readed = file.read(sz);
+		}
 		return true;
 	}
 	if (read_version == 0)