HuffmanDecoder Class Reference

Handles reading a binary-encoded file, reconstructing the Huffman codes, and decoding the data. More...

#include <HuffmanDecoder.hpp>

Collaboration diagram for HuffmanDecoder:

Public Member Functions
vector< uint8_t >	decodeFile (const string &filenameIn, const string &filenameOut)
	Decodes a file and writes the decoded output to another file.
vector< uint8_t >	decodeFile (const string &filenameIn)
	Decodes an input file and returns the decoded contents.
vector< uint8_t >	decodeVector (const vector< uint8_t > &vector)
	Decodes a Huffman-encoded byte vector in memory.

Private Member Functions
void	readCodes ()
	Reads the Huffman header and code mappings from the encoded file.
vector< uint8_t >	readMessage ()
	Reads and decodes the Huffman-encoded message from the input file.
vector< uint8_t >	decodeVec (const vector< uint8_t > &buffer)
	Decodes a buffer of raw Huffman-encoded bytes into original data.

Private Attributes
ifstream	inFile
	Input file stream from which the encoded data is read.
unordered_map< uint32_t, uint8_t >	code
	Maps Huffman codes (represented as integers) to original byte values.
uint64_t	current_position
	Tracks the current byte position in the input file for reading code maps and data.
uint8_t	last_bit_to_read
	Specifies how many bits in the last byte are valid and should be read.

Detailed Description

Handles reading a binary-encoded file, reconstructing the Huffman codes, and decoding the data.

Member Function Documentation

decodeFile() [1/2]

vector< uint8_t > HuffmanDecoder::decodeFile

(

const string &

filenameIn

)

Decodes an input file and returns the decoded contents.

Parameters

filenameIn

The name of the input file to decode.

Returns

The decoded data as a byte vector.

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decodeFile() [2/2]

vector< uint8_t > HuffmanDecoder::decodeFile	(	const string &	filenameIn,
		const string &	filenameOut )

Decodes a file and writes the decoded output to another file.

Parameters

filenameIn	The name of the encoded input file.
filenameOut	The name of the output file to write the decoded data.

Returns

The decoded data as a byte vector.

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decodeVec()

vector< uint8_t > HuffmanDecoder::decodeVec ( const vector< uint8_t > & buffer )

private

Decodes a buffer of raw Huffman-encoded bytes into original data.

Parameters

buffer

The encoded data buffer.

Returns

A vector of decoded bytes.

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decodeVector()

vector< uint8_t > HuffmanDecoder::decodeVector

(

const vector< uint8_t > &

vector

)

Decodes a Huffman-encoded byte vector in memory.

Parameters

vector

The encoded byte vector.

Returns

The decoded byte vector.

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readCodes()

void HuffmanDecoder::readCodes ( )

private

Reads the Huffman header and code mappings from the encoded file.

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readMessage()

vector< uint8_t > HuffmanDecoder::readMessage ( )

private

Reads and decodes the Huffman-encoded message from the input file.

Returns

A vector of decoded bytes.

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Member Data Documentation

code

unordered_map<uint32_t, uint8_t> HuffmanDecoder::code

private

Maps Huffman codes (represented as integers) to original byte values.

current_position

uint64_t HuffmanDecoder::current_position

private

Tracks the current byte position in the input file for reading code maps and data.

inFile

ifstream HuffmanDecoder::inFile

private

Input file stream from which the encoded data is read.

last_bit_to_read

uint8_t HuffmanDecoder::last_bit_to_read

private

Specifies how many bits in the last byte are valid and should be read.

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

• include/huffmandecoder/HuffmanDecoder.hpp
• src/huffmandecoder/HuffmanDecoder.cpp