reflector.cpp

#include "reflector.h"
#include "helper.h"
#include "errors.h"
#include <fstream>
#include <istream>
#include <iostream>
using namespace std;

void Reflector::operate_reflector(int &i)
{

	for (int a = 0; a <= 25; a++)
	{
		if (i == reflector[a])
		{
			if (a % 2)
			{
				
				i = (reflector[a - 1]);
				return;
			}

			if (!(a % 2))
			{
				i = (reflector[a + 1]);
				return;
			}
		}
	}

} 

bool Reflector::set_reflector(char const filename[], int& error)
{
	ifstream reflector_file;//Open file
	reflector_file.open(filename);
	if(reflector_file.fail())//If error opening file
	{
		cerr << "Reflector file " << filename << " open failed." 
		<< endl;		
		error = ERROR_OPENING_CONFIGURATION_FILE;
		return false;
	}

	if (eof_test(reflector_file))//Check if file empty
	{
		cerr << "Reflector file " << filename << " empty." << endl;
		reflector_file.close();
		error = INCORRECT_NUMBER_OF_REFLECTOR_PARAMETERS;
		return false;
	}

	int index, repeat_index = 0;

	for (index = 0 ; index <= 26 && !(eof_test(reflector_file)) ; index++)
	{
		if(index <= 25)
		{
			if(!(symbol_test(reflector_file)))//Check for non-numeric chars
			{
				cerr << "Non-numeric character in reflector file " 
				<< filename << "." << endl;
				reflector_file.close();	
				error = NON_NUMERIC_CHARACTER;
				return false;
			}

			reflector_file >> reflector[index];//Read in

			if (!(range_test(reflector, index)))//Check number within range
			{
				cerr << "Number out of range in reflector file "
				<< filename << "." << endl;
				reflector_file.close();
				error = INVALID_INDEX;
				return false;
			}
			
			if (index > 0)//Check for reptitions of read in numbers
			{
				if(!(repetition_test(reflector, index, 
							repeat_index)))
				{
					cerr << "Invalid mapping of input " << 
					reflector[index] << " in " << filename 
					<< "." << endl;
					reflector_file.close();
					error = INVALID_REFLECTOR_MAPPING;
					return false;
				}
			}
		}
	}	

	if (index % 2)//Check if number read in is odd
	{
		cerr << "Incorrect (odd) number of mappings in reflector file " 
		<< filename << "." << endl;
		reflector_file.close();
		error = INCORRECT_NUMBER_OF_REFLECTOR_PARAMETERS;
		return false;
	} else if (index < 26)//Check if number read in is less than 26
	{
		cerr << "Insufficient number of mappings in reflector file " 
		<< filename << "." << endl;
		reflector_file.close();
		error = INCORRECT_NUMBER_OF_REFLECTOR_PARAMETERS;

	} else if (index > 26)//Check if number read in is over 26
	{
		cerr << "Too many mappings in reflector file " << filename 
		<< "." << endl;
		reflector_file.close();
		error = INCORRECT_NUMBER_OF_REFLECTOR_PARAMETERS;
		return false;
	}
	
	reflector_file.close();
	return true;

}