Blame common.h

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#ifndef COMMON_H
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#define COMMON_H
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#include <cstdio></cstdio>
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#define logf(...) do { fprintf(stdout, __VA_ARGS__); fflush(stdout); } while(0)
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#define HideDebugMSG(...) do {} while(0)
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#ifdef NDEBUG
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#	define ShowDebugMSG(...) do {} while(0)
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#else
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#	define ShowDebugMSG(...) do { \
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		logf("DEBUG %16lld %s:%s:%d:", monotonicTime(), __FILE__, __func__, __LINE__); \
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		logf(" " __VA_ARGS__); \
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		logf("\n"); \
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	} while(0)
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#endif
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enum {
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	PACKET_SIZE     = 470,
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	PACKETS_COUNT   = 8*PACKET_SIZE,
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	TCP_BUFFER_SIZE = PACKET_SIZE*PACKETS_COUNT,
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	CRYPT_BLOCK     = 128,
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	HASH_SIZE       = 32,
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};
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enum : unsigned short {
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	CMD_SHIFT   = 12,
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	CMD_MASK    = (unsigned short)(0xffff << CMD_SHIFT),
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	SIZE_MASK   = (unsigned short)(~CMD_MASK),
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	CMD_DATA      = 0,
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	CMD_CONFIRM   = 1,
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	CMD_TERM      = 2,
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	CMDMAX        = 3,
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};
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typedef unsigned long long Time;
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Time monotonicTime();
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Time globalTime();
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const char* bitsToString(const void *data, int size);
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inline bool cycleLequal(unsigned int a, unsigned int b)
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	{ return (b - a) <= 0x7fffffff; }
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inline bool cycleLess(unsigned int a, unsigned int b)
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	{ return !cycleLequal(b, a); }
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inline bool timeLequal(Time a, Time b)
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	{ return (b - a) <= 0x7fffffffffffffffull; }
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inline bool timeLess(Time a, Time b)
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	{ return !timeLequal(b, a); }
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class Address {
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public:
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	union {
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		struct { unsigned int ipUInt; };
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		struct { unsigned char ip[4]; };
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	};
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	unsigned short port;
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	inline Address(): ipUInt(), port() { }
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	inline bool operator<(const Address &other) const {
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		return ipUInt < other.ipUInt ? true
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		     : other.ipUInt < ipUInt ? false
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		     : port < other.port;
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	}
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	void print() const;
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};
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class ConnId {
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public:
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	Address address;
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	unsigned int id;
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	inline ConnId(): id() { }
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	inline bool operator<(const ConnId &other) const {
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		return address < other.address ? true
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				: other.address < address ? false
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				: id < other.id;
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	}
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};
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struct __attribute__((__packed__)) Packet {
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	unsigned int connId;
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	unsigned int index;
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	unsigned short cmdSize;
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	unsigned char payload[PACKET_SIZE];
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	inline Packet():
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		connId(), index(), cmdSize(), payload() { }
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	inline int getSize() const
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		{ return cmdSize & SIZE_MASK; }
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	inline int getCommand() const
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		{ return cmdSize >> CMD_SHIFT; }
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	inline void init(
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		unsigned int connId,
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		unsigned int index,
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		unsigned short cmd,
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		unsigned short size )
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	{
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		this->connId = connId;
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		this->index = index;
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		this->cmdSize = (cmd << CMD_SHIFT) | size;
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	}
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};
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enum {
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	FULL_PACKET_SIZE  = sizeof(Packet),
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	HEADER_SIZE       = FULL_PACKET_SIZE - PACKET_SIZE,
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	CRYPT_PACKET_SIZE = ((FULL_PACKET_SIZE + HASH_SIZE - 1)/CRYPT_BLOCK + 1)*CRYPT_BLOCK,
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};
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#endif