diff options
author | Kevin Lyda <kevin@ie.suberic.net> | 2017-02-12 14:38:12 +0000 |
---|---|---|
committer | Niall Sheridan <nsheridan@gmail.com> | 2017-02-12 14:38:12 +0000 |
commit | ed8bc523fd0d1a66acf3fa449c453508035efdfc (patch) | |
tree | c05849546e1dd9d771dcc4c4ff52056d249a95fb /vendor/github.com/prometheus/client_golang/prometheus/fnv.go | |
parent | 9c344a0a95c44ef9cebade7b8a65ac160d9eb900 (diff) |
Initial pass at prometheus support. (#56)
Diffstat (limited to 'vendor/github.com/prometheus/client_golang/prometheus/fnv.go')
-rw-r--r-- | vendor/github.com/prometheus/client_golang/prometheus/fnv.go | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/fnv.go b/vendor/github.com/prometheus/client_golang/prometheus/fnv.go new file mode 100644 index 0000000..e3b67df --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/fnv.go @@ -0,0 +1,29 @@ +package prometheus + +// Inline and byte-free variant of hash/fnv's fnv64a. + +const ( + offset64 = 14695981039346656037 + prime64 = 1099511628211 +) + +// hashNew initializies a new fnv64a hash value. +func hashNew() uint64 { + return offset64 +} + +// hashAdd adds a string to a fnv64a hash value, returning the updated hash. +func hashAdd(h uint64, s string) uint64 { + for i := 0; i < len(s); i++ { + h ^= uint64(s[i]) + h *= prime64 + } + return h +} + +// hashAddByte adds a byte to a fnv64a hash value, returning the updated hash. +func hashAddByte(h uint64, b byte) uint64 { + h ^= uint64(b) + h *= prime64 + return h +} |