1 files changed, 56 insertions, 0 deletions
diff --git a/src/org/xbill/DNS/utils/hexdump.java b/src/org/xbill/DNS/utils/hexdump.java
new file mode 100644
index 0000000..1a79a40
--- /dev/null
+++ b/src/org/xbill/DNS/utils/hexdump.java
@@ -0,0 +1,56 @@
+// Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org)
+
+package org.xbill.DNS.utils;
+
+/**
+ * A routine to produce a nice looking hex dump
+ *
+ * @author Brian Wellington
+ */
+
+public class hexdump {
+
+private static final char [] hex = "0123456789ABCDEF".toCharArray();
+
+/**
+ * Dumps a byte array into hex format.
+ * @param description If not null, a description of the data.
+ * @param b The data to be printed.
+ * @param offset The start of the data in the array.
+ * @param length The length of the data in the array.
+ */
+public static String
+dump(String description, byte [] b, int offset, int length) {
+	StringBuffer sb = new StringBuffer();
+
+	sb.append(length + "b");
+	if (description != null)
+		sb.append(" (" + description + ")");
+	sb.append(':');
+
+	int prefixlen = sb.toString().length();
+	prefixlen = (prefixlen + 8) & ~ 7;
+	sb.append('\t');
+
+	int perline = (80 - prefixlen) / 3;
+	for (int i = 0; i < length; i++) {
+		if (i != 0 && i % perline == 0) {
+			sb.append('\n');
+			for (int j = 0; j < prefixlen / 8 ; j++)
+				sb.append('\t');
+		}
+		int value = (int)(b[i + offset]) & 0xFF;
+		sb.append(hex[(value >> 4)]);
+		sb.append(hex[(value & 0xF)]);
+		sb.append(' ');
+	}
+	sb.append('\n');
+	return sb.toString();
+}
+
+public static String
+dump(String s, byte [] b) {
+	return dump(s, b, 0, b.length);
+}
+
+}