hashing.go raw

   1  /*
   2   * Copyright 2021 ByteDance Inc.
   3   *
   4   * Licensed under the Apache License, Version 2.0 (the "License");
   5   * you may not use this file except in compliance with the License.
   6   * You may obtain a copy of the License at
   7   *
   8   *     http://www.apache.org/licenses/LICENSE-2.0
   9   *
  10   * Unless required by applicable law or agreed to in writing, software
  11   * distributed under the License is distributed on an "AS IS" BASIS,
  12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13   * See the License for the specific language governing permissions and
  14   * limitations under the License.
  15   */
  16  
  17  package caching
  18  
  19  import (
  20      `unsafe`
  21  
  22      `github.com/bytedance/sonic/internal/rt`
  23  )
  24  
  25  var (
  26      V_strhash = rt.UnpackEface(rt.Strhash)
  27      S_strhash = *(*uintptr)(V_strhash.Value)
  28  )
  29  
  30  func StrHash(s string) uint64 {
  31      if v := rt.Strhash(unsafe.Pointer(&s), 0); v == 0 {
  32          return 1
  33      } else {
  34          return uint64(v)
  35      }
  36  }
  37