| URL: https://github.com/google/cityhash |
| This is a fast non-cryptographic hash function. |
| There are currently two distinct sets of CityHash functions: |
| v1.0.3 and v1.1+ that produce distinct outputs. |
| The version in //base/third_party/cityhash_v103 is 1.0.3 and has some hash |
| quality issues that led to non-backwards compatible changes in v1.1+. See |
| //base/hash/README.md for instructions on how to choose a hash function. |
| - guarded function declaration (i.e. CityHash64) within a namespace |
| (base::internal::cityhash_v111). |
| - defined bswap_32/bswap_64 to use compiler builtins to make 'native_client' |
| - remove unneeded CRC32 stuff. |
| - formating to make 'git cl format' happy. |
| - Use the builtins for bswap when compiling with clang. |
| - https://github.com/google/cityhash/pull/36 |
