#1455 Add Airspy HF+/Discovery Tuner Support (#1524)

* #1455 Add support for airspy hf+/discovery tuners

* #1455 testing updates

---------

Co-authored-by: Dennis Sheirer <dsheirer@github.com>

src/main/java/io/github/dsheirer/util/ByteUtil.java

@@ -0,0 +1,65 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.util;
+
+/**
+ * Utilities for working with bytes and byte arrays
+ */
+public class ByteUtil
+{
+    /**
+     * Converts a byte array to an integer using big endian format.
+     * @param bytes containing four bytes.
+     * @param offset into the byte array to start parsing.
+     * @return signed integer value.
+     */
+    public static int toInteger(byte[] bytes, int offset)
+    {
+        if(bytes == null || bytes.length < (offset + 4))
+        {
+            throw new IllegalArgumentException("Conversion to integer requires byte array with at least 4 bytes - " +
+                    "length:" + bytes.length + " offset:" + offset);
+        }
+
+        int value = (bytes[offset + 3] & 0xFF) << 24;
+        value += (bytes[offset + 2] & 0xFF) << 16;
+        value += (bytes[offset + 1] & 0xFF) << 8;
+        value += (bytes[offset] & 0xFF);
+
+        return value;
+    }
+
+    /**
+     * Formats the byte array as a string of hexadecimal values.
+     * @param bytes to format
+     * @return hex string
+     */
+    public static String toHexString(byte[] bytes)
+    {
+        StringBuilder sb = new StringBuilder();
+
+        for(byte b : bytes)
+        {
+            sb.append(String.format("%02X", b));
+        }
+
+        return sb.toString();
+    }
+}