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// Copyright 2016 The etcd 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 stringutil exports string utility functions.
package stringutil
import "math/rand"
const (
chars = "abcdefghijklmnopqrstuvwxyz0123456789"
)
// UniqueStrings returns a slice of randomly generated unique strings.
func UniqueStrings(maxlen uint, n int) []string {
exist := make(map[string]bool)
ss := make([]string, 0)
for len(ss) < n {
s := randomString(maxlen)
if !exist[s] {
exist[s] = true
ss = append(ss, s)
}
}
return ss
}
// RandomStrings returns a slice of randomly generated strings.
func RandomStrings(maxlen uint, n int) []string {
ss := make([]string, 0)
for i := 0; i < n; i++ {
ss = append(ss, randomString(maxlen))
}
return ss
}
func randomString(l uint) string {
s := make([]byte, l)
for i := 0; i < int(l); i++ {
s[i] = chars[rand.Intn(len(chars))]
}
return string(s)
}
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