jgrogan/stuff-from-scratch
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add test fixture.

Browse source
This commit is contained in:
James Grogan 2022-11-29 18:00:19 +00:00
parent af6fad72eb
commit d6d4319e21
37 changed files with 421 additions and 279 deletions
Download patch file Download diff file Expand all files Collapse all files

14
src/compression/huffman/HuffmanEncoder.h
View file

@ -6,6 +6,7 @@
#include "HuffmanFixedCodes.h"
#include <vector>
#include <tuple>
#include <unordered_map>
class PrefixCodeGenerator
@ -21,11 +22,11 @@ public:
class HuffmanEncoder : public PrefixCodeGenerator
{
using DataStream = std::vector<unsigned char>;
using CountPair = std::pair<unsigned char, unsigned>;
using CountPair = std::pair<unsigned, unsigned>;
using Hit = std::tuple<unsigned, unsigned, unsigned char>;
public:
void encode(const DataStream& stream);
void encode(const std::vector<unsigned>& counts);
void encode(const std::unordered_map<unsigned char, unsigned>& counts);
uint32_t getLengthValue(unsigned length);
@ -38,18 +39,19 @@ public:
std::optional<PrefixCode> getEndOfStreamValue() const override;
void initializeTrees();
void initializeTrees(const std::vector<Hit>& hits);
void setUseFixedCode(bool useFixed);
private:
void initializeLiteralLengthTable();
void initializeLiteralLengthTable(const std::vector<Hit>& hits);
void dumpTree(const RawTree<CountPair>& tree) const;
void dumpNode(RawNode<CountPair>* node, unsigned depth) const;
bool mUseFixedCode{false};
bool mTableIsInitialized{false};
std::vector<unsigned char> mSymbolMapping;
HuffmanCodeLengthTable mLiteralLengthTable;
HuffmanCodeLengthTable mDistanceTable;
};