/// <summary>
/// Gets the lines of source code. Ignores all empty lines and comments.
/// </summary>
/// <param name="options"></param>
/// <returns></returns>
private SourceLine[] GetSourceLines(AssemblerOptions options)
{
List<SourceLine> sourceLines = new List<SourceLine>();
var lineNumber = 1;
using (var sourceReader = new StreamReader(options.SourceFile))
{
var line = sourceReader.ReadLine();
while (line != null)
{
if (string.IsNullOrWhiteSpace(line))
{
//Do nothing
}
else
{
if (!line.TrimStart().StartsWith("#"))
{
sourceLines.Add(new SourceLine(lineNumber, line));
}
}
lineNumber++;
line = sourceReader.ReadLine();
}
}
return sourceLines.ToArray();
}
static void Main(string[] args)
{
var options = new AssemblerOptions()
{
SourceFile = "HelloWorld.asm",
OutputFile = @"C:\Users\rich.quackenbush\Documents\Visual Studio 2013\Projects\EVM\Debug\HelloWorld.evm"
};
var assembler = new EvmAssembler();
var result = assembler.Assemble(options);
foreach (var message in result.Messages)
{
System.Console.WriteLine("{0}:{1} {2}",
message.ErrorLevel,
message.LineNumber == null ? "" : string.Format("Line [{0}]", message.LineNumber),
message.Message);
}
if (result.Succeeded)
{
System.Console.WriteLine("Succeeded");
}
else
{
System.Console.WriteLine("Failed.");
}
System.Console.ReadKey();
}
public AssemblerResult Assemble(AssemblerOptions options)
{
if (options == null)
throw new ArgumentNullException("options");
List<AssemblerMessage> messages = new List<AssemblerMessage>();
try
{
//Get the lines
var sourceLines = GetSourceLines(options);
//Do the first pass
var pass1Result = Pass1(messages, sourceLines);
if (messages.All(m => m.ErrorLevel != ErrorLevel.Error))
{
Pass2(messages, pass1Result, options.OutputFile);
}
}
catch (Exception ex)
{
messages.Add(new AssemblerMessage(ErrorLevel.Error, ex.Message));
}
//We're done here
return new AssemblerResult()
{
Messages = messages.ToArray(),
Succeeded = messages.All(m => m.ErrorLevel != ErrorLevel.Error)
};
}
