1 files changed, 112 insertions, 0 deletions
diff --git a/framework/src/onos/utils/misc/src/main/java/org/onlab/util/HexString.java b/framework/src/onos/utils/misc/src/main/java/org/onlab/util/HexString.java
new file mode 100644
index 00000000..a1aba93b
--- /dev/null
+++ b/framework/src/onos/utils/misc/src/main/java/org/onlab/util/HexString.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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.onlab.util;
+
+public final class HexString {
+
+    private HexString() {
+
+    }
+
+    /**
+     * Convert a string of bytes to a ':' separated hex string.
+     *
+     * @param bytes string of bytes to convert
+     * @return "0f:ca:fe:de:ad:be:ef"
+     */
+    public static String toHexString(final byte[] bytes) {
+        if (bytes == null) {
+            return "(null)";
+        }
+        int i;
+        StringBuilder ret = new StringBuilder(bytes.length * 3 - 1);
+        String tmp;
+        for (i = 0; i < bytes.length; i++) {
+            if (i > 0) {
+                ret.append(':');
+            }
+            tmp = Integer.toHexString((bytes[i] & 0xff));
+            if (tmp.length() == 1) {
+                ret.append('0');
+            }
+            ret.append(tmp);
+        }
+        return ret.toString();
+    }
+
+    public static String toHexString(final long val, final int padTo) {
+        char[] arr = Long.toHexString(val).toCharArray();
+        StringBuilder ret = new StringBuilder(padTo * 3 - 1);
+        // prepend the right number of leading zeros
+        int i = 0;
+        for (; i < (padTo * 2 - arr.length); i++) {
+            ret.append('0');
+            if ((i % 2) != 0) {
+                ret.append(':');
+            }
+        }
+        for (int j = 0; j < arr.length; j++) {
+            ret.append(arr[j]);
+            if ((((i + j) % 2) != 0) && (j < (arr.length - 1))) {
+                ret.append(':');
+            }
+        }
+        return ret.toString();
+    }
+
+    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) {
+        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) {
+        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;
+    }
+}