byte2str.go

/*
 * Copyright 2021 CloudWeGo 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
 *
 *     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 utils

import (
	"reflect"
	"unsafe"
)

// SliceByteToString converts []byte to string without copy.
// DO NOT USE unless you know what you're doing.
func SliceByteToString(b []byte) string {
	return *(*string)(unsafe.Pointer(&b))
}

// StringToSliceByte converts string to []byte without copy.
// DO NOT USE unless you know what you're doing.
func StringToSliceByte(s string) []byte {
	p := unsafe.Pointer((*reflect.StringHeader)(unsafe.Pointer(&s)).Data)
	var b []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&b))
	hdr.Data = uintptr(p)
	hdr.Cap = len(s)
	hdr.Len = len(s)
	return b
}