blob: 5e97e6950a556294723461ea5e110a7d63100674 [file] [log] [blame]
// Copyright 2020 The Pigweed Authors
// 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
// 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.
#pragma once
#include <cstddef>
#include <string_view>
namespace pw::kvs::internal {
// The hash function used to hash keys.
constexpr uint32_t Hash(std::string_view string) {
uint32_t hash = 0;
uint32_t coefficient = 65599u;
for (char ch : string) {
hash += coefficient * uint32_t(ch);
coefficient *= 65599u;
return hash;
} // namespace pw::kvs::internal