mirror of
https://gitee.com/rainbond/Rainbond.git
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54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
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// RAINBOND, Application Management Platform
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// Copyright (C) 2014-2017 Goodrain Co., Ltd.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version. For any non-GPL usage of Rainbond,
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// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
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// must be obtained first.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package utils
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import (
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"math/rand"
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"time"
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)
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// ASCII values 33 ~ 126
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const _dcl = 126 - 33 + 1
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var defaultCharacters [_dcl]byte
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func init() {
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for i := 0; i < _dcl; i++ {
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defaultCharacters[i] = byte(i + 33)
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}
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rand.Seed(time.Now().UnixNano())
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}
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func RandString(length int, characters ...byte) string {
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if len(characters) == 0 {
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characters = defaultCharacters[:]
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}
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n := len(characters)
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var rs = make([]byte, length)
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for i := 0; i < length; i++ {
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rs[i] = characters[rand.Intn(n-1)]
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}
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return string(rs)
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}
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