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CraftyBoss
18cdf141cb
Original repository: https://github.com/AxioDL/kabufuda Cleaned up & converted to `aurora::card`, with SDL3 file I/O. --------- Co-authored-by: Phillip Stephens <antidote.crk@gmail.com> Co-authored-by: Jack Andersen <jackoalan@gmail.com> Co-authored-by: Lioncash <mathew1800@gmail.com> Co-authored-by: Luke Street <luke@street.dev>
42 lines
949 B
C++
42 lines
949 B
C++
#include <ctime>
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#include "../internal.hpp"
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namespace aurora::card {
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uint64_t getGCTime() {
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time_t sysTime, tzDST;
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time(&sysTime);
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// Account for DST where needed
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tm* 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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time_t tzDiff = sysTime - mktime(gmTime);
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return static_cast<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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*checksum = 0;
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*checksumInv = 0;
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for (size_t i = 0; i < len; ++i) {
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*checksum += bswap(data[i]);
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*checksumInv += bswap(static_cast<uint16_t>(data[i] ^ 0xFFFF));
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}
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*checksum = bswap(*checksum);
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*checksumInv = bswap(*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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} // namespace aurora::card
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