#ifndef CMessage__h
#define CMessage__h
#include <string>
#include <iostream>

#define MAX_TRANSFER_LEN	(2*1024*1024)	//系统默认读缓冲区就这么大，/proc/sys/net/core/rmem_default

namespace Chromium {
	class CMessage {
	public:
		CMessage();
		explicit CMessage(unsigned int length);
		explicit CMessage(CMessage* p);
		~CMessage();
		const char* getPayload() const;
		const unsigned int getLength();
		char* getWriteableData();
		unsigned int getBufferLength();
		int getMessageType();
		int getSessionID();
		int getTransID();
		void exchangeSessionIdAndTransId();
		bool getIsEnd();
		int getEventID();
		int getSignatureID();
		unsigned int getCMessageLength();
		void clear();

		void setSessionID(int sessionid, bool hasTransId = true);
		void setTransID(int transid);

		std::string printfHEX(int preNum = 0);	//0即printAll
		void hexToFile();

	private:
		int memoryDynamicGrowth();
	public:
		enum { HEADER_LENGTH = 4 };
		enum { SUGGEST_BUFFER_LENGTH = 1024 * 4 };
	private:
		char* _data;
		unsigned int _buf_length;
	};

}

#endif