22 lines
520 B
Go
22 lines
520 B
Go
|
// Copyright 2015 Huan Du. All rights reserved.
|
||
|
|
// Licensed under the MIT license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package xstrings
|
||
|
|
|
||
|
|
const bufferMaxInitGrowSize = 2048
|
||
|
|
|
||
|
|
// Lazy initialize a buffer.
|
||
|
|
func allocBuffer(orig, cur string) *stringBuilder {
|
||
|
|
output := &stringBuilder{}
|
||
|
|
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
|
||
|
|
}
|