mirror of https://github.com/AxioDL/kabufuda.git
45 lines
977 B
C++
45 lines
977 B
C++
#include "kabufuda/Util.hpp"
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#include <time.h>
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namespace kabufuda
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{
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uint64_t getGCTime()
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{
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time_t sysTime, tzDiff, tzDST;
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struct tm * gmTime;
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time(&sysTime);
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// Account for DST where needed
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gmTime = localtime(&sysTime);
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if (gmTime->tm_isdst == 1)
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tzDST = 3600;
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else
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tzDST = 0;
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// Lazy way to get local time in sec
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gmTime = gmtime(&sysTime);
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tzDiff = sysTime - mktime(gmTime);
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return (uint64_t)(sysTime + tzDiff + tzDST) - 0x386D4380;
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}
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void calculateChecksumBE(const uint16_t* data, size_t len, uint16_t* checksum, uint16_t* checksumInv)
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{
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*checksum = 0;
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*checksumInv = 0;
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for (size_t i = 0; i < len; ++i)
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{
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*checksum += SBig(data[i]);
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*checksumInv += SBig(uint16_t(data[i] ^ 0xFFFF));
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}
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*checksum = SBig(*checksum);
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*checksumInv = SBig(*checksumInv);
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if (*checksum == 0xFFFF)
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*checksum = 0;
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if (*checksumInv == 0xFFFF)
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*checksumInv = 0;
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}
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}
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