1 files changed, 45 insertions, 0 deletions
diff --git a/sd_id128/util.go b/sd_id128/util.go
new file mode 100644
index 0000000..ae50008
--- /dev/null
+++ b/sd_id128/util.go
@@ -0,0 +1,45 @@
+// Copyright 2016 Luke Shumaker
+//
+// 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 sd_id128
+
+import (
+	"io/ioutil"
+	"os"
+)
+
+func hexchar(x byte) byte {
+	return "0123456789abcdef"[x&15]
+}
+
+func unhexchar(c byte) (byte, error) {
+	if c >= '0' && c <= '9' {
+		return c - '0', nil
+	} else if c >= 'a' && c <= 'f' {
+		return c - 'a' + 10, nil
+	} else if c >= 'A' && c <= 'F' {
+		return c - 'A' + 10, nil
+	}
+	return 0, ErrInvalid
+}
+
+func readfile(filename string) (string, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+	b, err := ioutil.ReadAll(file)
+	return string(b), err
+}