gtsocial-umbx

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hashing.go (1032B)

      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(strhash)
     27     S_strhash = *(*uintptr)(V_strhash.Value)
     28 )
     29 
     30 //go:noescape
     31 //go:linkname strhash runtime.strhash
     32 func strhash(_ unsafe.Pointer, _ uintptr) uintptr
     33 
     34 func StrHash(s string) uint64 {
     35     if v := strhash(unsafe.Pointer(&s), 0); v == 0 {
     36         return 1
     37     } else {
     38         return uint64(v)
     39     }
     40 }