--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/huffman/codec.h Fri May 15 20:13:36 2015 +0300
@@ -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