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LLVM 19.0.0git
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The intermediate state used during hashing. More...
#include "llvm/ADT/Hashing.h"
Public Member Functions | |
| void | mix (const char *s) |
| Mix in a 64-byte buffer of data. | |
| uint64_t | finalize (size_t length) |
| Compute the final 64-bit hash code value based on the current state and the length of bytes hashed. | |
Static Public Member Functions | |
| static hash_state | create (const char *s, uint64_t seed) |
| Create a new hash_state structure and initialize it based on the seed and the first 64-byte chunk. | |
| static void | mix_32_bytes (const char *s, uint64_t &a, uint64_t &b) |
| Mix 32-bytes from the input sequence into the 16-bytes of 'a' and 'b', including whatever is already in 'a' and 'b'. | |
Public Attributes | |
| uint64_t | h0 = 0 |
| uint64_t | h1 = 0 |
| uint64_t | h2 = 0 |
| uint64_t | h3 = 0 |
| uint64_t | h4 = 0 |
| uint64_t | h5 = 0 |
| uint64_t | h6 = 0 |
The intermediate state used during hashing.
Currently, the algorithm for computing hash codes is based on CityHash and keeps 56 bytes of arbitrary state.
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inlinestatic |
Create a new hash_state structure and initialize it based on the seed and the first 64-byte chunk.
This effectively performs the initial mix.
Definition at line 274 of file Hashing.h.
References h4, h5, h6, llvm::hashing::detail::hash_16_bytes(), llvm::hashing::detail::k1, mix(), and llvm::hashing::detail::shift_mix().
Referenced by llvm::hashing::detail::hash_combine_recursive_helper::combine_data(), and llvm::hashing::detail::hash_combine_range_impl().
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inline |
Compute the final 64-bit hash code value based on the current state and the length of bytes hashed.
Definition at line 319 of file Hashing.h.
References h0, h1, h2, h3, h4, h5, h6, llvm::hashing::detail::hash_16_bytes(), llvm::hashing::detail::k1, and llvm::hashing::detail::shift_mix().
Referenced by llvm::hashing::detail::hash_combine_recursive_helper::combine(), and llvm::hashing::detail::hash_combine_range_impl().
Mix in a 64-byte buffer of data.
We mix all 64 bytes even when the chunk length is smaller, but we record the actual length.
Definition at line 302 of file Hashing.h.
References llvm::hashing::detail::fetch64(), h0, h1, h2, h3, h4, h5, h6, llvm::hashing::detail::k1, mix_32_bytes(), and std::swap().
Referenced by llvm::hashing::detail::hash_combine_recursive_helper::combine(), llvm::hashing::detail::hash_combine_recursive_helper::combine_data(), create(), and llvm::hashing::detail::hash_combine_range_impl().
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inlinestatic |
Mix 32-bytes from the input sequence into the 16-bytes of 'a' and 'b', including whatever is already in 'a' and 'b'.
Definition at line 289 of file Hashing.h.
References llvm::hashing::detail::fetch64().
Referenced by mix().
| uint64_t llvm::hashing::detail::hash_state::h0 = 0 |
Definition at line 269 of file Hashing.h.
Referenced by finalize(), and mix().
| uint64_t llvm::hashing::detail::hash_state::h1 = 0 |
Definition at line 269 of file Hashing.h.
Referenced by finalize(), and mix().
| uint64_t llvm::hashing::detail::hash_state::h2 = 0 |
Definition at line 269 of file Hashing.h.
Referenced by finalize(), and mix().
| uint64_t llvm::hashing::detail::hash_state::h3 = 0 |
Definition at line 269 of file Hashing.h.
Referenced by finalize(), and mix().
| uint64_t llvm::hashing::detail::hash_state::h4 = 0 |
Definition at line 269 of file Hashing.h.
Referenced by create(), finalize(), and mix().
| uint64_t llvm::hashing::detail::hash_state::h5 = 0 |
Definition at line 269 of file Hashing.h.
Referenced by create(), finalize(), and mix().
| uint64_t llvm::hashing::detail::hash_state::h6 = 0 |
Definition at line 269 of file Hashing.h.
Referenced by create(), finalize(), and mix().
1.9.6