public string[] GetAssemblyCodeFromMemoryAccessVMCommand(string vmCommand)
{
string[] assemblyCodeEquivalentToVMCommand;
string[] splitVMCommand = vmCommand.Split(' ');
string stackCommand;
string segment;
string i;
int iAsInt;
if (splitVMCommand.Length == 3)
{
stackCommand = splitVMCommand[0];
segment = splitVMCommand[1];
i = splitVMCommand[2];
if (SyntaxValidator.IsConvertableToInteger(i))
{
iAsInt = Convert.ToInt32(i);
if (iAsInt > 65535)
{
throw new Exception("The value parameter cannot be larger than 65535");
}
}
else
{
throw new Exception("An integer is expected as the last parameter");
}
}
else
{
throw new Exception("Memory access command does not have the correct number of arguments");
}
assemblyCodeEquivalentToVMCommand = GetAssemblyCode(stackCommand, segment, i);
return(assemblyCodeEquivalentToVMCommand);
}
public IEnumerable <string> GetAssemblyCommands(IEnumerable <string> vmCommands)
{
IEnumerable <string> nextAssemblyInstructions;
List <string> assemblyCommands = new List <string>();
int vmCommandLineNumber = 1;
try
{
foreach (string vmCommand in vmCommands)
{
if (SyntaxValidator.IsArithmeticVMCommand(vmCommand))
{
nextAssemblyInstructions = translator.GetAssemblyCodeFromArithmeticVMCommand(vmCommand);
}
else if (SyntaxValidator.IsMemoryAccessVMCommand(vmCommand))
{
nextAssemblyInstructions = translator.GetAssemblyCodeFromMemoryAccessVMCommand(vmCommand);
}
else
{
throw new Exception("Unrecognized virtual machine command");
}
assemblyCommands.AddRange(nextAssemblyInstructions);
vmCommandLineNumber++;
}
Console.WriteLine("VM code converted to assembly code...");
return(assemblyCommands);
}
catch (Exception e)
{
string newErrorMessage =
"Error on line " + vmCommandLineNumber.ToString() + ": " + e.Message;
throw new Exception(newErrorMessage);
}
}