1 files changed, 58 insertions, 0 deletions
diff --git a/isoparser/src/main/java/com/coremedia/iso/Hex.java b/isoparser/src/main/java/com/coremedia/iso/Hex.java
new file mode 100644
index 0000000..b3d55ef
--- /dev/null
+++ b/isoparser/src/main/java/com/coremedia/iso/Hex.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/*
+Extracted from commons-codec
+ */
+package com.coremedia.iso;
+
+import java.io.ByteArrayOutputStream;
+
+/**
+ * Converts hexadecimal Strings.
+ */
+public class Hex {
+    private static final char[] DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
+
+    public static String encodeHex(byte[] data) {
+        return encodeHex(data, 0);
+    }
+
+    public static String encodeHex(byte[] data, int group) {
+        int l = data.length;
+        char[] out = new char[(l << 1) + (group > 0 ? (l / group) : 0)];
+        // two characters form the hex value.
+        for (int i = 0, j = 0; i < l; i++) {
+            if ((group > 0) && ((i % group) == 0) && j > 0) {
+                out[j++] = '-';
+            }
+
+            out[j++] = DIGITS[(0xF0 & data[i]) >>> 4];
+            out[j++] = DIGITS[0x0F & data[i]];
+        }
+        return new String(out);
+    }
+
+    public static byte[] decodeHex(String hexString) {
+        ByteArrayOutputStream bas = new ByteArrayOutputStream();
+        for (int i = 0; i < hexString.length(); i += 2) {
+            int b = Integer.parseInt(hexString.substring(i, i + 2), 16);
+            bas.write(b);
+        }
+        return bas.toByteArray();
+    }
+}