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26 lines
677 B
C++
26 lines
677 B
C++
#include "platform/base/byte_utils.h"
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#include <cstdlib>
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#include "platform/base/base_input_stream.h"
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#include "absl/strings/str_format.h"
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namespace location {
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namespace nearby {
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std::string ByteUtils::ToFourDigitString(ByteArray& bytes) {
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int multiplier = 1;
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int hashCode = 0;
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BaseInputStream base_input_stream{bytes};
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while (base_input_stream.IsAvailable(1)) {
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auto byte = static_cast<int>(base_input_stream.ReadUint8());
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hashCode = (hashCode + byte * multiplier) % kHashBasePrime;
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multiplier = multiplier * kHashBaseMultiplier % kHashBasePrime;
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}
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return absl::StrFormat("%04d", abs(hashCode));
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}
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} // namespace nearby
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} // namespace location
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