initial import
Change-Id: Ief25aef0066ea96bd2c329ccef974c072b3a5a73
diff --git a/of/lib/src/main/java/org/projectfloodlight/openflow/util/HexString.java b/of/lib/src/main/java/org/projectfloodlight/openflow/util/HexString.java
new file mode 100644
index 0000000..bcc46f7
--- /dev/null
+++ b/of/lib/src/main/java/org/projectfloodlight/openflow/util/HexString.java
@@ -0,0 +1,100 @@
+/**
+ * Copyright (c) 2008 The Board of Trustees of The Leland Stanford Junior
+ * University
+ *
+ * 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 org.projectfloodlight.openflow.util;
+
+import org.projectfloodlight.openflow.types.U8;
+
+public class HexString {
+ /**
+ * Convert a string of bytes to a ':' separated hex string
+ *
+ * @param bytes
+ * @return "0f:ca:fe:de:ad:be:ef"
+ */
+ public static String toHexString(final byte[] bytes) {
+ int i;
+ String ret = "";
+ String tmp;
+ for (i = 0; i < bytes.length; i++) {
+ if (i > 0)
+ ret += ":";
+ tmp = Integer.toHexString(U8.f(bytes[i]));
+ if (tmp.length() == 1)
+ ret += "0";
+ ret += tmp;
+ }
+ return ret;
+ }
+
+ public static String toHexString(final long val, final int padTo) {
+ char arr[] = Long.toHexString(val).toCharArray();
+ String ret = "";
+ // prepend the right number of leading zeros
+ int i = 0;
+ for (; i < (padTo * 2 - arr.length); i++) {
+ ret += "0";
+ if ((i % 2) != 0)
+ ret += ":";
+ }
+ for (int j = 0; j < arr.length; j++) {
+ ret += arr[j];
+ if ((((i + j) % 2) != 0) && (j < (arr.length - 1)))
+ ret += ":";
+ }
+ return ret;
+ }
+
+ public static String toHexString(final long val) {
+ return toHexString(val, 8);
+ }
+
+ /**
+ * Convert a string of hex values into a string of bytes
+ *
+ * @param values
+ * "0f:ca:fe:de:ad:be:ef"
+ * @return [15, 5 ,2, 5, 17]
+ * @throws NumberFormatException
+ * If the string can not be parsed
+ */
+ public static byte[] fromHexString(final String values) throws NumberFormatException {
+ String[] octets = values.split(":");
+ byte[] ret = new byte[octets.length];
+
+ for (int i = 0; i < octets.length; i++) {
+ if (octets[i].length() > 2)
+ throw new NumberFormatException("Invalid octet length");
+ ret[i] = Integer.valueOf(octets[i], 16).byteValue();
+ }
+ return ret;
+ }
+
+ public static long toLong(String value) throws NumberFormatException {
+ String[] octets = value.split(":");
+ if (octets.length > 8)
+ throw new NumberFormatException("Input string is too big to fit in long: " + value);
+ long l = 0;
+ for (String octet: octets) {
+ if (octet.length() > 2)
+ throw new NumberFormatException("Each colon-separated byte component must consist of 1 or 2 hex digits: " + value);
+ short s = Short.parseShort(octet, 16);
+ l = (l << 8) + s;
+ }
+ return l;
+ }
+}