CRC32.cpp 433 B

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  1. /*
  2. * Copyright (c) 2020, the SerenityOS developers.
  3. *
  4. * SPDX-License-Identifier: BSD-2-Clause
  5. */
  6. #include <AK/Span.h>
  7. #include <AK/Types.h>
  8. #include <LibCrypto/Checksum/CRC32.h>
  9. namespace Crypto::Checksum {
  10. void CRC32::update(ReadonlyBytes data)
  11. {
  12. for (size_t i = 0; i < data.size(); i++) {
  13. m_state = table[(m_state ^ data.at(i)) & 0xFF] ^ (m_state >> 8);
  14. }
  15. };
  16. u32 CRC32::digest()
  17. {
  18. return ~m_state;
  19. }
  20. }