citycrc.h 1.9 KB

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  1. // Copyright (c) 2011 Google, Inc.
  2. //
  3. // Permission is hereby granted, free of charge, to any person obtaining a copy
  4. // of this software and associated documentation files (the "Software"), to deal
  5. // in the Software without restriction, including without limitation the rights
  6. // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  7. // copies of the Software, and to permit persons to whom the Software is
  8. // furnished to do so, subject to the following conditions:
  9. //
  10. // The above copyright notice and this permission notice shall be included in
  11. // all copies or substantial portions of the Software.
  12. //
  13. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14. // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15. // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16. // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17. // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  18. // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  19. // THE SOFTWARE.
  20. //
  21. // CityHash, by Geoff Pike and Jyrki Alakuijala
  22. //
  23. // This file declares the subset of the CityHash functions that require
  24. // _mm_crc32_u64(). See the CityHash README for details.
  25. //
  26. // Functions in the CityHash family are not suitable for cryptography.
  27. #ifndef CITY_HASH_CRC_H_
  28. #define CITY_HASH_CRC_H_
  29. #include <city.h>
  30. #ifdef __SSE4_2__
  31. namespace CityHash_v1_0_2
  32. {
  33. // Hash function for a byte array.
  34. uint128 CityHashCrc128(const char *s, size_t len);
  35. // Hash function for a byte array. For convenience, a 128-bit seed is also
  36. // hashed into the result.
  37. uint128 CityHashCrc128WithSeed(const char *s, size_t len, uint128 seed);
  38. // Hash function for a byte array. Sets result[0] ... result[3].
  39. void CityHashCrc256(const char *s, size_t len, uint64 *result);
  40. }
  41. #endif // __SSE4_2__
  42. #endif // CITY_HASH_CRC_H_