diff options
Diffstat (limited to 'vendor/github.com/dolthub/maphash/hasher.go')
-rw-r--r-- | vendor/github.com/dolthub/maphash/hasher.go | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/vendor/github.com/dolthub/maphash/hasher.go b/vendor/github.com/dolthub/maphash/hasher.go deleted file mode 100644 index ef53596a2..000000000 --- a/vendor/github.com/dolthub/maphash/hasher.go +++ /dev/null @@ -1,48 +0,0 @@ -// Copyright 2022 Dolthub, Inc. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package maphash - -import "unsafe" - -// Hasher hashes values of type K. -// Uses runtime AES-based hashing. -type Hasher[K comparable] struct { - hash hashfn - seed uintptr -} - -// NewHasher creates a new Hasher[K] with a random seed. -func NewHasher[K comparable]() Hasher[K] { - return Hasher[K]{ - hash: getRuntimeHasher[K](), - seed: newHashSeed(), - } -} - -// NewSeed returns a copy of |h| with a new hash seed. -func NewSeed[K comparable](h Hasher[K]) Hasher[K] { - return Hasher[K]{ - hash: h.hash, - seed: newHashSeed(), - } -} - -// Hash hashes |key|. -func (h Hasher[K]) Hash(key K) uint64 { - // promise to the compiler that pointer - // |p| does not escape the stack. - p := noescape(unsafe.Pointer(&key)) - return uint64(h.hash(p, h.seed)) -} |