util.go

// Copyright 2023 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 etag

import "unsafe"

// b2s converts byte slice to a string without memory allocation
func b2s(b []byte) string {
	return *(*string)(unsafe.Pointer(&b))
}

// appendUint appends n to dst and returns the extended dst
func appendUint(dst []byte, n uint32) []byte {
	var b [20]byte
	buf := b[:]
	i := len(buf)
	var q uint32
	for n >= 10 {
		i--
		q = n / 10
		buf[i] = '0' + byte(n-q*10)
		n = q
	}
	i--
	buf[i] = '0' + byte(n)
	dst = append(dst, buf[i:]...)
	return dst
}