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hash.go
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hash.go
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/*
* Copyright 2022 ByteDance 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 encoder
import (
`unsafe`
)
//go:noescape
//go:linkname strhash runtime.strhash
//goland:noinspection GoUnusedParameter
func strhash(p unsafe.Pointer, h uintptr) uintptr
func mkhash(v int) int {
if v != 0 {
return v
} else {
return 1
}
}
func hash64(h uint64) int {
h ^= h >> 33
h *= 0x9e3779b97f4a7c15
return mkhash(int(h &^ (1 << 63)))
}
func hashstr(p unsafe.Pointer) int {
return mkhash(int(strhash(p, 0) &^ (1 << 63)))
}