traefik/vendor/github.com/huandu/xstrings/common.go
2019-04-05 12:44:03 +02:00

25 lines
539 B
Go

// Copyright 2015 Huan Du. All rights reserved.
// Licensed under the MIT license that can be found in the LICENSE file.
package xstrings
import (
"bytes"
)
const bufferMaxInitGrowSize = 2048
// Lazy initialize a buffer.
func allocBuffer(orig, cur string) *bytes.Buffer {
output := &bytes.Buffer{}
maxSize := len(orig) * 4
// Avoid to reserve too much memory at once.
if maxSize > bufferMaxInitGrowSize {
maxSize = bufferMaxInitGrowSize
}
output.Grow(maxSize)
output.WriteString(orig[:len(orig)-len(cur)])
return output
}