List <SourceLine> ProcessFromStream(string fileName, int lineNumber, StreamReader sr, bool stopAtFirstInstruction = false)
{
var sourceLines = new List <SourceLine>();
var lineSources = new List <string>();
var blockComment = false;
var readyForNewLine = true;
var expected = TokenType.LabelInstr;
var previousType = TokenType.None;
var opens = new Stack <char>();
Macro definingMacro = null;
string nextLine;
var stopProcessing = false;
var previousWasPlus = false;
List <Token> tokens = null;
var linesProcessed = lineNumber;
while ((nextLine = sr.ReadLine()) != null && !stopProcessing)
{
if (readyForNewLine)
{
StartNewLine();
}
else
{
lineSources.Add(nextLine);
}
linesProcessed++;
var it = nextLine.GetIterator();
char c;
var previous = EOS;
var isWidth = false;
while (!_lineHasErrors && (c = it.GetNext()) != EOS)
{
if (char.IsWhiteSpace(c))
{
while (c == ' ' || c == '\t')
{
previous = c;
c = it.GetNext();
}
if (c == EOS)
{
break;
}
}
if (blockComment)
{
if (c == '*' && it.PeekNext() == '/')
{
blockComment = !it.MoveNext();
}
continue;
}
char peek = it.PeekNext();
if (c == '/' && peek == '/')
{
break;
}
if (c == '*' && peek == '/')
{
LogError(fileName, lineNumber, it.Index + 1, "\"*/\" does not close a block comment.");
break;
}
if (c == '/' && peek == '*')
{
it.MoveNext();
blockComment = true;
continue;
}
if (c == ';')
{
if (!_options.IgnoreCommentColons)
{
expected = TokenType.Instruction;
c = it.FirstOrDefault(chr => chr == ':');
}
else
{
c = EOS;
}
if (c == EOS)
{
break;
}
}
if (c == ':')
{
if ((expected != TokenType.Instruction && expected != TokenType.EndOrBinary &&
(tokens.Count == 0 || tokens[^ 1].Type != TokenType.Instruction)) || !LineTerminates())
{
LogError(fileName, lineNumber, it.Index + 1, "Unexpected expression.");
break;
}
lineSources[^ 1] = lineSources[^ 1].Substring(0, it.Index);
IEnumerable <SourceLine> ProcessMacros(IEnumerable <SourceLine> uncommented)
{
var macroProcessed = new List <SourceLine>();
RandomAccessIterator <SourceLine> lineIterator = uncommented.GetIterator();
SourceLine line = null;
while ((line = lineIterator.GetNext()) != null)
{
try
{
if (string.IsNullOrWhiteSpace(line.ParsedSource))
{
macroProcessed.Add(line);
continue;
}
if (line.InstructionName.Equals(".macro"))
{
if (string.IsNullOrEmpty(line.LabelName))
{
Assembler.Log.LogEntry(line, line.Instruction, "Macro name not specified.");
continue;
}
var macroName = "." + line.LabelName;
if (_macros.ContainsKey(macroName))
{
Assembler.Log.LogEntry(line, line.Label, $"Macro named \"{line.LabelName}\" already defined.");
continue;
}
if (Assembler.IsReserved.Any(i => i.Invoke(macroName)) ||
!char.IsLetter(line.LabelName[0]))
{
Assembler.Log.LogEntry(line, line.Label, $"Macro name \"{line.LabelName}\" is not valid.");
continue;
}
Reserved.AddWord("MacroNames", macroName);
var compare = Assembler.Options.CaseSensitive ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase;
var macro = new Macro(line.Operand, line.ParsedSource, compare);
_macros[macroName] = macro;
var instr = line;
while ((line = lineIterator.GetNext()) != null && !line.InstructionName.Equals(".endmacro"))
{
if (macroName.Equals(line.InstructionName))
{
Assembler.Log.LogEntry(line, line.Instruction, "Recursive macro call not allowed.");
continue;
}
if (line.InstructionName.Equals(".macro"))
{
Assembler.Log.LogEntry(line, line.Instruction, "Nested macro definitions not allowed.");
continue;
}
if (line.InstructionName.Equals(".include") || line.InstructionName.Equals(".binclude"))
{
var includes = ExpandInclude(line);
foreach (var incl in includes)
{
if (macroName.Equals(incl.InstructionName))
{
Assembler.Log.LogEntry(incl, incl.Instruction, "Recursive macro call not allowed.");
continue;
}
macro.AddSource(incl);
}
}
else
{
macro.AddSource(line);
}
}
if (!string.IsNullOrEmpty(line.LabelName))
{
if (line.OperandHasToken)
{
Assembler.Log.LogEntry(line, line.Operand, "Unexpected argument found for macro definition closure.");
continue;
}
line.Instruction = null;
line.ParsedSource = line.ParsedSource.Replace(".endmacro", string.Empty);
macro.AddSource(line);
}
else if (line == null)
{
line = instr;
Assembler.Log.LogEntry(instr, instr.Instruction, "Missing closure for macro definition.");
continue;
}
}
else if (line.InstructionName.Equals(".include") || line.InstructionName.Equals(".binclude"))
{
macroProcessed.AddRange(ExpandInclude(line));
}
else if (_macros.ContainsKey(line.InstructionName))
{
if (!string.IsNullOrEmpty(line.LabelName))
{
SourceLine clone = line.Clone();
clone.Operand =
clone.Instruction = null;
clone.UnparsedSource =
clone.ParsedSource = line.LabelName;
macroProcessed.Add(clone);
}
Macro macro = _macros[line.InstructionName];
macroProcessed.AddRange(ProcessExpansion(macro.Expand(line.Operand)));
}
else if (line.InstructionName.Equals(".endmacro"))
{
Assembler.Log.LogEntry(line, line.Instruction,
"Directive \".endmacro\" does not close a macro definition.");
continue;
}
else
{
macroProcessed.Add(line);
}
}
catch (ExpressionException ex)
{
Assembler.Log.LogEntry(line, ex.Position, ex.Message);
}
}
return(macroProcessed);
}
