stringify key/val

stringify.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"encoding/binary"
+	"fmt"
+	"unicode/utf8"
+)
+
+// stringify ensures that we can print only valid characters.
+// It's wrong to assume that everything is a string, since BoltDB is typeless.
+func stringify(v []byte) string {
+	if utf8.Valid(v) {
+		ok := true
+		for _, r := range string(v) {
+			if r < 0x20 {
+				ok = false
+				break
+			} else if r >= 0x7f && r <= 0x9f {
+				ok = false
+				break
+			}
+		}
+		if ok {
+			return string(v)
+		}
+	}
+	if len(v) == 8 {
+		return fmt.Sprintf("%v", binary.BigEndian.Uint64(v))
+	}
+
+	return fmt.Sprintf("%x", v)
+}