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#ifndef _NTP_TIME
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#define _NTP_TIME
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#if (defined(_WIN32) || defined(_MSC_VER))
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#include <windows.h>
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#endif
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#include <time.h>
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#include <assert.h>
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#include "datatype.h"
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#ifndef _WIN32
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typedef struct _SYSTEMTIME {
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unsigned short wYear;
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unsigned short wMonth;
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unsigned short wDayOfWeek;
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unsigned short wDay;
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unsigned short wHour;
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unsigned short wMinute;
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unsigned short wSecond;
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unsigned short wMilliseconds;
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} SYSTEMTIME, *PSYSTEMTIME, *LPSYSTEMTIME;
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#endif
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static double NTP_FRACTIONAL_TO_MS = (((double)1000.0)/0xFFFFFFFF); //230ms->10位十进制,NTP_TO_SECOND表示十进制中的1代表多少秒，就是把1秒切割成32bit的数。
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static double NTP_TO_SECOND = (((double)1.0)/0xFFFFFFFF);
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static long JAN_1ST_1900 = 2415021;
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//Representation of an NTP timestamp
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typedef struct
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{
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ulong m_dwInteger;
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ulong m_dwFractional; // 2 packets of 32bit，one is integer part,the other is frantional part
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}NTPTIMEPACKET;
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//General functions
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SYSTEMTIME NtpTimePacket2SystemTime(NTPTIMEPACKET pNtpTime);
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double NtpTimePacket2Double(NTPTIMEPACKET pNtpTime);
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NTPTIMEPACKET Double2CNtpTimePacket(double f);
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NTPTIMEPACKET Systemtime2CNtpTimePacket(SYSTEMTIME st);
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NTPTIMEPACKET MyGetCurrentTime();
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NTPTIMEPACKET NewTime(double nOffset);
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ulong Ms2NtpFraction(u16_t wMilliSeconds);
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u16_t NtpFraction2Ms(ulong dwFraction);
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double NtpFraction2Second(ulong dwFraction);
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long GetJulianDay(u16_t Year, u16_t Month, u16_t Day);
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NTPTIMEPACKET host2network(NTPTIMEPACKET ntp);
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NTPTIMEPACKET network2host(NTPTIMEPACKET packet);
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//////////////////////////////////////////////////////////////////////////
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int send_sntp_packet(char* pszBuf, int nBuf);
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int is_readible(int *bReadible);
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int rcv_sntp_packet(char* pszBuf, int nBuf);
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void close_socket();
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int set_client_time(NTPTIMEPACKET * NewTime);
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//////////////////////////////////////////////////////////////////////////
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void set_last_error(unsigned long dwerror);
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long get_last_error();
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#endif
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