diff -r 01e4e9ae323a -r 8b697d30c49f sources/huffman/codec.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sources/huffman/codec.h	Thu Dec 11 07:18:11 2014 +0200
@@ -0,0 +1,70 @@
+/*
+ * skulltag::Codec class interface - Base class for data encoding or decoding operations.
+ *
+ * Copyright 2009 Timothy Landers
+ * email: code.vortexcortex@gmail.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef _CODEC_VERSION
+#define _CODEC_VERSION 1
+
+/** Prevents naming convention problems via encapsulation. */
+namespace skulltag {
+
+	/** Huffman tree node -- used to represent a Huffman tree. <br>
+	 * Huffman trees are use by compression / decompression codecs. */
+	struct HuffmanNode {
+		int bitCount;			/**< number of bits in the Huffman code. */
+		int code;				/**< bit representation of a Huffman code. */
+		int value;				/**< the value the Huffman code represents. */
+		HuffmanNode * branch;	/**< the left and right child branches or NULL (0) if leaf. */
+	};
+
+// Codec Class Interface
+
+	/** Base class for encoding and decoding data. */
+	class Codec {
+
+	public:
+
+		/** Decodes data read from an input buffer and stores the result in the output buffer.
+		 * @return number of bytes stored in the output buffer or -1 if an error occurs while encoding. */
+		virtual int encode(
+			unsigned char const * const input,	/**< in: pointer to the first byte to encode. */
+			unsigned char * const output,		/**< out: pointer to an output buffer to store data. */
+			int const &inLength,		/**< in: number of bytes of input buffer to encoded. */
+			int const &outLength		/**< in: maximum length of data to output. */
+		) const = 0;
+
+		/** Decodes data read from an input buffer and stores the result in the output buffer.
+		 * @return number of bytes stored in the output buffer or -1 if an error occurs while decoding. */
+		virtual int decode(
+			unsigned char const * const input,	/**< in: pointer to data that needs decoding. */
+			unsigned char * const output,		/**< out: pointer to output buffer to store decoded data. */
+			int const &inLength,		/**< in: number of bytes of input buffer to read. */
+			int const &outLength		/**< in: maximum length of data to output. */
+		) = 0;
+
+	}; // end class Codec
+
+}; // end namespace Codec
+
+#endif