public void WriteLine(AssemblyLine line, string comment)
{
if (line == null)
{
throw new ArgumentNullException(nameof(line));
}
switch (line.Type)
{
case AssemblyLineType.None:
break;
case AssemblyLineType.Label:
if (IndentLabels)
{
WriteIndentation();
}
WriteLabel(line);
break;
case AssemblyLineType.Directive:
if (IndentDirectives)
{
WriteIndentation();
}
WriteCommand(line);
if (line.Parameters.Length > 0)
{
if (IndentParameters)
{
WriteIndentation();
}
else
{
writer.Write(' ');
}
WriteParameters(line);
}
break;
case AssemblyLineType.Instruction:
if (IndentInstructions)
{
WriteIndentation();
}
WriteCommand(line);
if (line.Parameters.Length > 0)
{
if (IndentParameters)
{
WriteIndentation();
}
else
{
writer.Write(' ');
}
WriteParameters(line);
}
break;
default:
throw new ArgumentException($"Cannot write line of type {line.Type}.", nameof(line));
}
if (!string.IsNullOrEmpty(comment))
{
//WriteIndentation(); // or space?
writer.Write(' ');
WriteComment(comment);
}
writer.WriteLine();
}
public void WriteLine(AssemblyLine line)
{
WriteLine(line, null);
}
private void WriteParameters(AssemblyLine line)
{
writer.Write(string.Join(", ", line.Parameters));
}
private void WriteCommand(AssemblyLine line)
{
writer.Write(line.Value);
}
private void WriteLabel(AssemblyLine line)
{
writer.Write(line.Value);
writer.Write(':');
}
/// <summary>
/// Reads the next line from the stream.
/// </summary>
/// <returns></returns>
public AssemblyLine ReadLine()
{
if (reader == null)
{
return(null);
}
// Read the next line from the stream
var line = reader.ReadLine();
if (line == null)
{
return(null);
}
// Trim trailing whitespace
line = line.Trim();
// Trim the comment
line = AssemblyHelpers.RemoveComments(line);
// Handle empty lines
if (line.Length == 0)
{
return(AssemblyLine.Empty(currentLine++));
}
// Handle labels
var labelIndex = line.IndexOf(Label);
if (labelIndex >= 0)
{
return(AssemblyLine.Label(
line.Substring(0, labelIndex),
currentLine++
));
}
// Handle directives
var parameterIndex = line.IndexOfAny(WhiteSpace);
if (parameterIndex >= 0)
{
var value = line.Substring(0, parameterIndex);
var parameters = AssemblyHelpers.SplitParameters(line.Substring(parameterIndex)).ToArray();
if (value.Length > 0 && value[0] == '.')
{
return(AssemblyLine.Directive(
value,
parameters,
currentLine++
));
}
else
{
return(AssemblyLine.Instruction(
value,
parameters,
currentLine++
));
}
}
else
{
return((line.Length > 0 && line[0] == '.') ? AssemblyLine.Directive(line, currentLine++)
: AssemblyLine.Instruction(line, currentLine++));
}
}