HuffmanEncoder Class Reference

Encodes data using Huffman coding and writes it to a file in binary format. More...

#include <HuffmanEncoder.hpp>

Collaboration diagram for HuffmanEncoder:

Public Member Functions
	HuffmanEncoder (const string &fn, const HuffmanTree *root)
	Constructs a HuffmanEncoder with output file and tree reference.
void	encodeToFile (const vector< uint8_t > str)
	Encodes a byte vector and writes it to the output file.
void	encodeToFile (const string &fn)
	Encodes file contents (given by filename) and writes the encoded output.

Private Member Functions
void	writeHeader ()
	Writes the header of the encoded file, including code map sizes and padding info.
void	writeMapToBinary ()
	Serializes the Huffman code maps (8b/16b/32b) to the output file in binary format.
void	writeEncodedString ()
	Encodes the string using the Huffman tree and writes the resulting bitstream.
void	insertToBuffer (const bitset< 32 > &code)
	Inserts a 32-bit code into the internal buffer, managing space and alignment.

Private Attributes
vector< u_int32_t >	buffer
	A buffer that stores 32-bit chunks of the encoded bitstream.
uint8_t	space_left
	Indicates the remaining unused bits in the current buffer element.
ofstream	outFile
	Output file stream to which encoded data is written.
const HuffmanTree *	tree
	Pointer to the Huffman tree used for encoding.

Detailed Description

Encodes data using Huffman coding and writes it to a file in binary format.

Constructor & Destructor Documentation

HuffmanEncoder()

HuffmanEncoder::HuffmanEncoder	(	const string &	fn,
		const HuffmanTree *	root )

Constructs a HuffmanEncoder with output file and tree reference.

Parameters

fn	Output file name.
root	Pointer to the Huffman tree.

Member Function Documentation

encodeToFile() [1/2]

void HuffmanEncoder::encodeToFile

(

const string &

fn

)

Encodes file contents (given by filename) and writes the encoded output.

Parameters

fn	Input file name to be read and encoded.

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encodeToFile() [2/2]

void HuffmanEncoder::encodeToFile

(

const vector< uint8_t >

str

)

Encodes a byte vector and writes it to the output file.

Parameters

str	The input data as a byte vector.

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insertToBuffer()

void HuffmanEncoder::insertToBuffer ( const bitset< 32 > & code )

private

Inserts a 32-bit code into the internal buffer, managing space and alignment.

Parameters

code	The bitset representing the Huffman code.

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writeEncodedString()

void HuffmanEncoder::writeEncodedString ( )

private

Encodes the string using the Huffman tree and writes the resulting bitstream.

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writeHeader()

void HuffmanEncoder::writeHeader ( )

private

Writes the header of the encoded file, including code map sizes and padding info.

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writeMapToBinary()

void HuffmanEncoder::writeMapToBinary ( )

private

Serializes the Huffman code maps (8b/16b/32b) to the output file in binary format.

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Member Data Documentation

buffer

vector<u_int32_t> HuffmanEncoder::buffer

private

A buffer that stores 32-bit chunks of the encoded bitstream.

outFile

ofstream HuffmanEncoder::outFile

private

Output file stream to which encoded data is written.

space_left

uint8_t HuffmanEncoder::space_left

private

Indicates the remaining unused bits in the current buffer element.

tree

const HuffmanTree* HuffmanEncoder::tree

private

Pointer to the Huffman tree used for encoding.

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The documentation for this class was generated from the following files:

• include/huffmanencoder/HuffmanEncoder.hpp
• src/huffmanencoder/HuffmanEncoder.cpp