1 files changed, 82 insertions, 0 deletions

diff --git a/src/cz/crcs/ectester/reader/Util.java b/src/cz/crcs/ectester/reader/Util.java
new file mode 100644
index 0000000..7af6e9c
--- /dev/null
+++ b/src/cz/crcs/ectester/reader/Util.java
@@ -0,0 +1,82 @@
+package cz.crcs.ectester.reader;
+
+/**
+ * @author Petr Svenda petr@svenda.com
+ * @author Jan Jancar johny@neuromancer.sk
+ */
+public class Util {
+
+    public static short getShort(byte[] array, int offset) {
+        return (short) (((array[offset] & 0xFF) << 8) | (array[offset + 1] & 0xFF));
+    }
+
+    public static void setShort(byte[] array, int offset, short value) {
+        array[offset + 1] = (byte) (value & 0xFF);
+        array[offset] = (byte) ((value >> 8) & 0xFF);
+    }
+
+    public static byte[] hexToBytes(String hex) {
+        return hexToBytes(hex, true);
+    }
+
+    public static byte[] hexToBytes(String hex, boolean bigEndian) {
+        StringBuilder sb = new StringBuilder(hex.replace(" ", ""));
+        if (!bigEndian) {
+            sb.reverse();
+        }
+        int len = sb.length();
+        if (len % 2 == 1) {
+            sb.insert(0, "0");
+            ++len;
+        }
+
+        String data = sb.toString();
+        byte[] result = new byte[len / 2];
+        for (int i = 0; i < len; i += 2) {
+            result[i / 2] = (byte) ((Character.digit(data.charAt(i), 16) << 4)
+                    + (Character.digit(data.charAt(i + 1), 16)));
+        }
+        return result;
+    }
+
+    public static String byteToHex(byte data) {
+        return String.format("%02x", data);
+    }
+
+    public static String bytesToHex(byte[] data) {
+        return bytesToHex(data, 0, data.length, true);
+    }
+
+    public static String bytesToHex(byte[] data, int offset, int len) {
+        return bytesToHex(data, offset, len, true);
+    }
+
+    public static String bytesToHex(byte[] data, int offset, int len, boolean bAddSpace) {
+        StringBuilder buf = new StringBuilder();
+        for (int i = offset; i < (offset + len); i++) {
+            buf.append(byteToHex(data[i]));
+            if (bAddSpace && i != (offset + len - 1)) {
+                buf.append(" ");
+            }
+        }
+        return (buf.toString());
+    }
+
+    public static byte[] concatenate(byte[]... arrays) {
+        int len = 0;
+        for (byte[] array : arrays) {
+            if (array == null)
+                continue;
+            len += array.length;
+        }
+        byte[] out = new byte[len];
+        int offset = 0;
+        for (byte[] array : arrays) {
+            if (array == null)
+                continue;
+            System.arraycopy(array, 0, out, offset, array.length);
+            offset += array.length;
+        }
+        return out;
+    }
+}