MazeReader::MazeReader(std::string file) throw(MazeCreationException) {
m_filename = file;
m_in.open(m_filename);
if(!m_in.good()) {
throw(MazeCreationException("\nThe file could not be opened\n"));
}
m_in>>m_rows;
m_in>>m_cols;
m_in>>startRow;
m_in>>startCol;
if(m_rows < 1 || m_cols < 1) {
throw(MazeCreationException("\nInvalid size of maze\n"));
}
if(startCol < 0 || startRow < 0 || startRow >= m_rows || startCol >= m_cols) {
throw(MazeCreationException("\nInvalid starting position\n"));
}
try {
readMaze();
}
catch(MazeCreationException& e) {
std::cout<<e.what()<<std::endl;
}
m_in.close();
}
void MazeReader::readMaze() throw (MazeCreationException){
std::ifstream myInput(filename);
//check for validity of file
if(!(myInput.good()))
{
throw MazeCreationException("Error reading Maze file.\n");
}
else
{
myInput >> m_rows;
myInput >> m_columns;
myInput >> m_startRow;
myInput >> m_startCol;
//initialize MazeArray to proper size
MazeArray = new char*[m_rows];
//create the rows of arrays
for(int k = 0; k< m_rows; k++)
{
MazeArray[k] = new char[m_columns];
}
//populate array with characters
for(int i = 0; i < m_rows; i++)
{
//std::cout << "entered first loop\n";
for(int j = 0; j < m_columns; j++)
{
//for each index of char array
myInput >> MazeArray[i][j];
}
}
}
//check for valid size and starting position
if(m_rows <= 0 || m_columns <= 0 || m_startCol < 0 || m_startCol > m_columns || m_startRow > m_rows || m_startRow < 0)
{
throw MazeCreationException("Error with Maze Size or Starting Position.\n");
}
//test output
std::cout << "Maze Information: \n"
<< "# rows: " << m_rows << "\n"
<< "# cols: " << m_columns << "\n"
<< "starting row: " << m_startRow << "\n"
<< "starting column: " << m_startCol << "\n";
}