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458 lines
10 KiB
C++
458 lines
10 KiB
C++
// License: AGPLv3 or later. https://www.gnu.org/licenses/licenses.html
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#ifndef _CFC_H_
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#define _CFC_H_
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#include <vector>
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#include "auxiliary.h"
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#include "general_functions.h"
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class Mint
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{
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public:
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Mint() {};
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Mint(int Number, int Modulus);
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int getNumber() const;
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// standard function to be used for template codeword.
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// it just 'return getNumber();'
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int getSymbol() const;
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int operator-(const Mint mint2) const;
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static const int zeroSymbol = 0;
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private:
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int number;
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int modulus;
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};
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class Melt
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{
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public:
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Melt() {};
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Melt(char Character);
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char getCharacter() const;
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// standard function to be used for template codeword.
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// it just 'return getCharacter();'
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char getSymbol() const;
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int operator-(const Melt melt2) const;
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static const char zeroSymbol = 'a';
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private:
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char character;
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};
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template<typename T>
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class Codeword
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{
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public:
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Codeword();
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Codeword(std::vector<T> &aTVector);
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Codeword(const Codeword<T> &aCodeword);
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void push_back(T symbol);
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std::vector<T> getCodeword() const;
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int getWeight() const;
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// return -1 if encounters error i.e.:
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// If size of own codeword and codeword passed as argument
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// mismatch However It Will Not Happen Within Runtime Of This
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// Program. This is just defensive programming.
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int Distance(const Codeword<T> &aCodeword) const;
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void Display() const;
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int size() const;
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T getSymbolByIndex(int index) const;
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//bool isZeroCodeword() const;
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private:
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void Weight();
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void incrementalWeight();
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//void calculateIfZeroCodeword();
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std::vector<T> codeword;
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int weight = 0;
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//bool isZerocodeword;
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};
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template<typename T>
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class Codebook
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{
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public:
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Codebook();
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Codebook(std::vector<T> &aTVector);
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Codebook(const Codebook<T> &aCodebook);
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void push_back(T codeword);
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std::vector<T> getCodebook() const;
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void Display() const;
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int getMinimumWeight() const;
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std::vector<std::vector<int>> getDistance() const;
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int getMinimumDistance() const;
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private:
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// this function simply calls other three private functions
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void doCalculations();
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void minimumWeight();
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void calcDistance();
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void minimumDistance();
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void doIncrementalCalculations();
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void minimumIncrementalWeight();
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void calcIncrementalDistance();
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void minimumIncrementalDistance();
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int minWeight = 0;
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std::vector<std::vector<int>> distance;
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int minDistance = 0;
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std::vector<T> codebook;
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inline void updateIfNewMinimumDistance(int aDistance);
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};
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class driver
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{
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public:
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driver(processArguments &ProgArgs);
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private:
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template<typename U>
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void processMintOrMelt(U aMintOrMelt);
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void processMint(Codebook<Codeword<Mint>> &theCodebook);
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void processMelt(Codebook<Codeword<Melt>> &theCodebook);
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// placeholder functions which are never called and
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// will print error and quit if called
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void processMint(Codebook<Codeword<Melt>> &theCodebook);
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void processMelt(Codebook<Codeword<Mint>> &theCodebook);
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processArguments &ProgramArguments;
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};
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/******TEMPLATE CLASES AND FUNCTIONS DEFINITION STARTS FROM HERE******/
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template<typename U>
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void driver::processMintOrMelt(U aMintOrMelt)
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{
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Codebook<Codeword<U>> theCodebook;
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Codeword<U> aCodeword;
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for (int i=0; i < 1 &&i < ProgramArguments.codebookSize(); i++)
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{
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for (int j=0; j < ProgramArguments.codewordLength(); j++)
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{
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aCodeword.push_back(aMintOrMelt);
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}
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theCodebook.push_back(aCodeword);
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}
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if (typeid(U) == typeid(Mint))
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{
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processMint(theCodebook);
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}
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else if (typeid(U) == typeid(Melt))
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{
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processMelt(theCodebook);
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}
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}
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template<typename T>
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Codeword<T>::Codeword()
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{
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}
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template<typename T>
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Codeword<T>::Codeword(std::vector<T> &aTVector)
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{
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for (T symbol: aTVector)
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{
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codeword.push_back(symbol);
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}
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Weight();
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}
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template<typename T>
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Codeword<T>::Codeword(const Codeword<T> &aCodeword)
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{
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codeword = aCodeword.getCodeword();
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weight = aCodeword.getWeight();
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}
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template<typename T>
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void Codeword<T>::push_back(T symbol)
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{
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codeword.push_back(symbol);
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incrementalWeight();
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}
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template<typename T>
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std::vector<T> Codeword<T>::getCodeword() const
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{
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return codeword;
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}
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template<typename T>
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int Codeword<T>::getWeight() const
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{
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return weight;
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}
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template<typename T>
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int Codeword<T>::Distance(const Codeword<T> &aCodeword) const
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{
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int distance = 0;
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if (codeword.size() != aCodeword.size())
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{
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cerr_only(
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"Internal",
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__FILE__,
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__func__,
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__LINE__,
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"For calculating Codeword Distance, no. of symbols in own"
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" codeword and codeword passed as argument mismatch. "
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"Though technically a possiblity, it should not happen "
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"within the run of this program."
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);
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distance = -1;
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}
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else
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{
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for (int i=0; i < size(); i++)
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{
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distance += codeword[i] - aCodeword.getSymbolByIndex(i);
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}
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}
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return distance;
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}
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template<typename T>
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void Codeword<T>::Display() const
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{
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for(T symbol: codeword)
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{
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std::cout << symbol.getSymbol() << " ";
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}
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std::cout << " Weight: " << weight << std::endl;
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}
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template<typename T>
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int Codeword<T>::size() const
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{
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return codeword.size();
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}
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template<typename T>
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T Codeword<T>::getSymbolByIndex(int index) const
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{
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if (codeword.size() > index)
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{
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return codeword[index];
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}
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else
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{
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cerr_only(
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"internal",
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__FILE__,
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__func__,
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__LINE__,
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"Index symbol requqested is greater than cointainer size "
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"An empty symbol of same type will be returned but this "
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"will therefore give garbage result."
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);
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T emptySymbol;
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return emptySymbol;
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}
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}
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template<typename T>
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void Codeword<T>::Weight()
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{
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weight = 0;
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for (T symbol: codeword)
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{
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if (symbol.getSymbol() != symbol.zeroSymbol)
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{
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weight++;
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}
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}
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}
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template<typename T>
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void Codeword<T>::incrementalWeight()
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{
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if (codeword[codeword.size()-1].getSymbol()
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!= codeword[0].zeroSymbol)
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{
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weight++;
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}
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}
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template<typename T>
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Codebook<T>::Codebook()
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{
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}
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template<typename T>
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Codebook<T>::Codebook(std::vector<T> &aTVector)
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{
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for (T codeword: aTVector)
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{
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codebook.push_back(codeword);
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}
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doCalculations();
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}
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template<typename T>
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Codebook<T>::Codebook(const Codebook<T> &aCodebook)
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{
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minWeight = aCodebook.getMinimumWeight();
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distance = aCodebook.getDistance();
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minDistance = aCodebook.getMinimumDistance();
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codebook = aCodebook.getCodebook();
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}
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template<typename T>
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void Codebook<T>::push_back(T codeword)
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{
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codebook.push_back(codeword);
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doIncrementalCalculations();
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}
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template<typename T>
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std::vector<T> Codebook<T>::getCodebook() const
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{
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return codebook;
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}
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template<typename T>
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void Codebook<T>::Display() const
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{
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for (T codeword: codebook)
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{
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codeword.Display();
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}
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std::cout
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<< "Minimum Weight: " << minWeight << '\n'
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<< "Minimum Distance: " << minDistance << '\n'
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<< "Distances Table:" << std::endl;
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for (auto row: distance)
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{
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for (int eachDistance: row)
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{
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std::cout << eachDistance << " ";
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}
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std::cout << "\b\n";
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}
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std::cout << std::flush;
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}
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template<typename T>
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int Codebook<T>::getMinimumWeight() const
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{
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return minWeight;
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}
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template<typename T>
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std::vector<std::vector<int>> Codebook<T>::getDistance() const
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{
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return distance;
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}
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template<typename T>
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int Codebook<T>::getMinimumDistance() const
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{
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return minDistance;
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}
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template<typename T>
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void Codebook<T>::doCalculations()
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{
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minimumWeight();
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calcDistance();
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minimumDistance();
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}
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template<typename T>
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void Codebook<T>::minimumWeight()
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{
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for (T codeword: codebook)
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{
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int weight = codeword.getWeight();
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if (weight < minWeight or minWeight == 0)
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{
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minWeight = weight;
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}
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}
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}
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template<typename T>
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void Codebook<T>::calcDistance()
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{
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int i = 0;
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for (T codeword: codebook)
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{
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distance.emplace_back();
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for(T otherCodeword: codebook)
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{
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int aDistance = codeword.Distance(otherCodeword);
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distance[i].push_back(aDistance);
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}
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}
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}
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template<typename T>
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void Codebook<T>::minimumDistance()
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{
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for (std::vector<int> distanceVector: distance)
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{
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for (int aDistance: distanceVector)
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{
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if ((aDistance < minDistance
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and aDistance != 0)
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or minDistance == 0)
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{
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minDistance = aDistance;
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}
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}
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}
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}
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template<typename T>
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void Codebook<T>::doIncrementalCalculations()
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{
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minimumIncrementalWeight();
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calcIncrementalDistance();
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minimumDistance();
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}
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template<typename T>
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void Codebook<T>::minimumIncrementalWeight()
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{
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int weight = codebook[codebook.size()-1].getWeight();
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if (weight < minWeight or minWeight == 0)
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{
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minWeight = weight;
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}
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}
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template<typename T>
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void Codebook<T>::calcIncrementalDistance()
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{
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int lastCodeword = codebook.size()-1;
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// Adding new column to table
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// previous codewords - new codeowrd
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for (int i=0; i < distance.size(); i++)
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{
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int aDistance = codebook[i].Distance(codebook[lastCodeword]);
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distance[i].push_back(aDistance);
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}
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// Adding new row to table
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// new codeword - all Codewords
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distance.emplace_back();
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for(T aCodeword: codebook)
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{
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int aDistance = codebook[lastCodeword].Distance(aCodeword);
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distance[distance.size()-1].push_back(aDistance);
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}
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}
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template<typename T>
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void Codebook<T>::minimumIncrementalDistance()
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{
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for (int aDistance: distance[distance.size()-1])
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{
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if (aDistance < minDistance or minDistance == 0)
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{
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minDistance = aDistance;
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}
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}
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}
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#endif
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