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Diffstat (limited to 'go/parabola_hackers/util.go')
-rw-r--r--go/parabola_hackers/util.go47
1 files changed, 47 insertions, 0 deletions
diff --git a/go/parabola_hackers/util.go b/go/parabola_hackers/util.go
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+++ b/go/parabola_hackers/util.go
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+// Copyright 2015-2016 Luke Shumaker <lukeshu@sbcglobal.net>.
+//
+// This is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of
+// the License, or (at your option) any later version.
+//
+// This software is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public
+// License along with this manual; if not, see
+// <http://www.gnu.org/licenses/>.
+
+package parabola_hackers
+
+import (
+ "crypto/rand"
+ "math/big"
+)
+
+func RandomString(alphabet string, n uint) (str string, err error) {
+ var alphabet_len = big.NewInt(int64(len(alphabet)))
+ var bigint *big.Int
+ _str := make([]byte, n)
+ for i := 0; i < len(_str); i++ {
+ bigint, err = rand.Int(rand.Reader, alphabet_len)
+ if err != nil {
+ return
+ }
+ _str[i] = alphabet[bigint.Int64()]
+ }
+ str = string(_str[:])
+ return
+}
+
+func Set2list(set map[string]bool) []string {
+ list := make([]string, len(set))
+ i := uint(0)
+ for item, _ := range set {
+ list[i] = item
+ i++
+ }
+ return list
+}