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CommandParser.cpp
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/*
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
Version 2, December 2004
Copyright (C) 2017 Ivan Vaccari <[email protected]>
Everyone is permitted to copy and distribute verbatim or modified
copies of this license document, and changing it is allowed as long
as the name is changed.
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. You just DO WHAT THE FUCK YOU WANT TO.
*/
#include "CommandParser.h"
#include "Tokenizer.h"
#include <iostream>
#include <fstream>
#include <algorithm>
#include <list>
Operation::Operation(){
targets.reserve(10);
parameters.reserve(10);
}
void Operation::execute(std::map<std::string,Matrix> &matrixes, std::map<std::string,ColumnVector> &columnVectors){
switch(type){
case Operation::Cramer:{
if(matrixes.find(parameters[0])==matrixes.end())
throw std::string("Cannot perform cramer. Undefined matrix ").append(parameters[0]);
if(columnVectors.find(parameters[1])==columnVectors.end())
throw std::string("Cannot perform cramer. Undefined columnVector ").append(parameters[0]);
std::cout<<"Solving "<<targets[0]<<"=cramer("<<parameters[0]<<","<<parameters[1]<<")..."<<std::endl;
ColumnVector Xi;
float d=matrixes[parameters[0]].determinant();
std::vector<float> result=Algorithms::cramer_solve(matrixes[parameters[0]],columnVectors[parameters[1]].toStdVector(),d);
columnVectors[targets[0]]=ColumnVector(result);
}
break;
case Operation::TriangularSolve:{
if(matrixes.find(parameters[0])==matrixes.end())
throw std::string("Cannot perform triangular back substitution. Undefined matrix ").append(parameters[0]);
if(columnVectors.find(parameters[1])==columnVectors.end())
throw std::string("Cannot perform triangular back substitution. Undefined columnVector ").append(parameters[0]);
std::cout<<"Solving "<<targets[0]<<"=triangularSolve("<<parameters[0]<<","<<parameters[1]<<")..."<<std::endl;
ColumnVector Xi;
std::vector<float> result=Algorithms::triangular_matrix_solve(matrixes[parameters[0]],columnVectors[parameters[1]].toStdVector());
columnVectors[targets[0]]=ColumnVector(result);
}
break;
case Operation::GaussReduction:{
if(matrixes.find(parameters[0])==matrixes.end())
throw std::string("Cannot perform gauss reduction. Undefined matrix ").append(parameters[0]);
if(columnVectors.find(parameters[1])==columnVectors.end())
throw std::string("Cannot perform gauss reduction. Undefined columnVector ").append(parameters[0]);
std::cout<<"Building reduct system "<<targets[0]<<","<<targets[1]<<","<<targets[2]<<"=gauss("<<parameters[0]<<","<<parameters[1]<<")..."<<std::endl;
ColumnVector Xi;
std::tuple<Matrix,std::vector<float>, Matrix> result=Algorithms::gauss_reduction(matrixes[parameters[0]],columnVectors[parameters[1]].toStdVector());
matrixes[targets[0]]=std::get<0>(result);
matrixes[targets[2]]=std::get<2>(result);
columnVectors[targets[1]]=ColumnVector(std::get<1>(result));
}
break;
case Operation::Doolittle:{
if(matrixes.find(parameters[0])==matrixes.end())
throw std::string("Cannot perform doolittle decomposition. Undefined matrix ").append(parameters[0]);
std::cout<<"Building reduct system "<<targets[0]<<","<<targets[1]<<"=doolittle("<<parameters[0]<<")..."<<std::endl;
std::tuple<Matrix,Matrix> result=Algorithms::doolittle(matrixes[parameters[0]]);
matrixes[targets[0]]=std::get<0>(result);
matrixes[targets[1]]=std::get<1>(result);
}
break;
case Operation::Print:{
if(columnVectors.find(parameters[0])!=columnVectors.end()){
std::cout<<"Printing vector "<<parameters[0]<<":"<<std::endl;
columnVectors[parameters[0]].print();
}else if(matrixes.find(parameters[0])!=matrixes.end()){
std::cout<<"Printing matrix "<<parameters[0]<<":"<<std::endl;
matrixes[parameters[0]].print();
}else{
throw std::string("Cannot print undefined variable ").append(parameters[0]);
}
}
break;
}
}
CommandParser::CommandParser()
{
//ctor
}
CommandParser::~CommandParser()
{
}
std::list<std::string> CommandParser::getMatrixesToBeLoaded(){
return matrixParameters;
}
std::list<std::string> CommandParser::getColumnVectorToBeLoaded(){
return columnVectorParameters;
}
bool CommandParser::checkPrint(const std::vector<std::string> & tokens){
if (tokens.size()<4)
return false;
if (tokens[0]!="print")
return false ;
if (tokens[1]!="(")
return false;
if (tokens[3]!=")")
return false;
Operation op;
op.parameters.push_back(tokens[2]);
op.type=Operation::Print;
operations.push_back(op);
return true;
}
bool CommandParser::checkCramer(const std::vector<std::string> & tokens){
if (tokens.size()<8)
return false;
if (tokens[1]!="=")
return false ;
if (tokens[2]!="cramer")
return false;
if (tokens[3]!="(")
return false;
if (tokens[5]!=",")
return false;
if (tokens[7]!=")")
return false;
checkLoadMatrixFromFile(tokens[4]);
checkLoadColumnVectorFromFile(tokens[4]);
Operation op;
op.targets.push_back(tokens[0]);
columnVectorTargets.push_back(tokens[0]);
columnVectorParameters.remove(tokens[0]);
op.parameters.push_back(tokens[4]);
op.parameters.push_back(tokens[6]);
op.type=Operation::Cramer;
operations.push_back(op);
return true;
}
bool CommandParser::checkTriangularSolve(const std::vector<std::string> & tokens){
if (tokens.size()<8)
return false;
if (tokens[1]!="=")
return false ;
if (tokens[2]!="triangularSolve")
return false;
if (tokens[3]!="(")
return false;
if (tokens[5]!=",")
return false;
if (tokens[7]!=")")
return false;
checkLoadMatrixFromFile(tokens[4]);
checkLoadColumnVectorFromFile(tokens[4]);
Operation op;
op.targets.push_back(tokens[0]);
columnVectorTargets.push_back(tokens[0]);
op.parameters.push_back(tokens[4]);
op.parameters.push_back(tokens[6]);
op.type=Operation::TriangularSolve;
operations.push_back(op);
return true;
}
void CommandParser::checkLoadMatrixFromFile(std::string matrixName){
if((std::find(matrixTargets.begin(),matrixTargets.end(),matrixName)==matrixTargets.end()) &&
(std::find(matrixParameters.begin(),matrixParameters.end(),matrixName)==matrixParameters.end())){
matrixParameters.push_back(matrixName);
}
}
void CommandParser::checkLoadColumnVectorFromFile(std::string columnName){
if((std::find(columnVectorTargets.begin(),columnVectorTargets.end(),columnName)==columnVectorTargets.end())&&
(std::find(columnVectorParameters.begin(),columnVectorParameters.end(),columnName)==columnVectorParameters.end())){
columnVectorParameters.push_back(columnName);
}
}
bool CommandParser::checkGaussReduction(const std::vector<std::string> & tokens){
if (tokens.size()<9)
return false;
if (tokens[1]!=",")
return false ;
if (tokens[3]!=",")
return false ;
if (tokens[5]!="=")
return false ;
if (tokens[6]!="gauss")
return false ;
if (tokens[7]!="(")
return false;
if (tokens[9]!=",")
return false;
if (tokens[11]!=")")
return false;
checkLoadMatrixFromFile(tokens[8]);
checkLoadColumnVectorFromFile(tokens[10]);
Operation op;
op.parameters.push_back(tokens[8]);
op.parameters.push_back(tokens[10]);
op.type=Operation::GaussReduction;
op.targets.push_back(tokens[0]);
op.targets.push_back(tokens[2]);
op.targets.push_back(tokens[4]);
matrixTargets.push_back(tokens[0]);
matrixTargets.push_back(tokens[4]);
columnVectorTargets.push_back(tokens[2]);
operations.push_back(op);
return true;
}
bool CommandParser::checkDoolittle(const std::vector<std::string> & tokens){
if (tokens.size()<8)
return false;
if (tokens[1]!=",")
return false ;
if (tokens[3]!="=")
return false ;
if (tokens[4]!="doolittle")
return false ;
if (tokens[5]!="(")
return false;
if (tokens[7]!=")")
return false;
checkLoadMatrixFromFile(tokens[6]);
Operation op;
op.parameters.push_back(tokens[6]);
op.type=Operation::Doolittle;
op.targets.push_back(tokens[0]);
op.targets.push_back(tokens[2]);
matrixTargets.push_back(tokens[0]);
columnVectorTargets.push_back(tokens[2]);
operations.push_back(op);
return true;
}
void CommandParser::parseLine(const std::string &line){
Tokenizer t;
std::vector<std::string> tokens=t.tokenize(line);
bool ok=checkCramer(tokens);
ok=ok||checkTriangularSolve(tokens);
ok=ok||checkGaussReduction(tokens);
ok=ok||checkPrint(tokens);
ok=ok||checkDoolittle(tokens);
if (!ok)
throw std::string("unknow command ").append(line);
}
void CommandParser::loadFromFile(const std::string &fileName){
std::ifstream file(fileName.c_str());
std::string command_section("[commands]");
bool process=false;
if (file.is_open()){
std::string line;
while (std::getline(file,line)){
if (process && line.length()==0){
process=false;
break;
}else if (process){
parseLine(line);
}else if (line==command_section){
process=true;
}
}
file.close();
}else{
throw std::string("Unable to open file.");
}
}