/// <summary>
/// Validates instruction lines for the load instructions and edit instructions dialogs
/// </summary>
/// <param name="instructionLines">The list of lines to validate.</param>
/// <returns>An empty string if there were no errors, otherwise, the error.</returns>
private string ValidateInstructionsFromDialog(List <string> instructionLines)
{
// Show error if user entered more than MAX_INSTRUCTION_COUNT instructions
if (instructionLines.Count > Settings.Default.MemorySize)
{
return($"Please enter {Settings.Default.MemorySize} or fewer instructions. You entered {instructionLines.Count}.");
}
else
{
// Validate each instruction
foreach (string instructionLine in instructionLines)
{
if (string.IsNullOrWhiteSpace(instructionLine))
{
return($"Error: Please do not enter any empty lines.");
}
else if (instructionLine[0] == '#')
{
if (!ValidationEngine.ValidateStartLocation(instructionLine.Substring(1, instructionLine.Length - 1)))
{
return($"Error: One of the '#' instructions is referencing an invalid memory location.");
}
}
else
{
InstructionError instructionError = ValidationEngine.ValidateInstruction(instructionLine);
if (instructionError == InstructionError.InvalidLength)
{
return($"Error: One of the instructions isn't { Settings.Default.InstructionSize } characters in length.");
}
else if (instructionError == InstructionError.SignMissing)
{
return("Error: One of the instructions does not start with a '+' or '-' sign.");
}
else if (instructionError == InstructionError.InvalidCharacters)
{
return("Error: One of the instructions contains invalid characters.");
}
}
} // End foreach
return(string.Empty);
}
}
/// <summary>
/// Gets program starting locations.
/// </summary>
/// <returns>A list containing one or two starting locations. If program #2's starting location
/// was blank, only one starting location (program 1's)
/// is returned. If program #1's starting location was blank, 0 is returned for program #1's
/// starting location.</returns>
private List <int> GetProgramStartingLocations()
{
List <int> startingLocations = new List <int>();
if (program1StartLocationTextBox.Text == string.Empty)
{
startingLocations.Add(0);
}
else
{
if (ValidationEngine.ValidateStartLocation(program1StartLocationTextBox.Text))
{
startingLocations.Add(Convert.ToInt32(program1StartLocationTextBox.Text));
}
else
{
MessageBox.Show($"Please enter a valid starting location for program 1.");
}
}
if (Settings.Default.MultiThreaded)
{
if (program2StartLocationTextBox.Text == string.Empty)
{
startingLocations.Add(0);
}
else
{
if (ValidationEngine.ValidateStartLocation(program2StartLocationTextBox.Text))
{
startingLocations.Add(Convert.ToInt32(program2StartLocationTextBox.Text));
}
else
{
MessageBox.Show($"Please enter a valid starting location for program 2.");
}
}
}
return(startingLocations);
}
