public AsmContext Assemble(string content, string fileName = null)
{
var symbols = new AsmSymbols();
IList<Token> tokens = new List<Token>();
LoadRecursive(content, tokens, fileName);
tokens = ProcessSymbolConstants(tokens, symbols);
AsmContext last = null;
for (var i = 1; i < 10; i++) {
var context = new AsmContext {
Queue = new TokensQueue(tokens),
Symbols = symbols,
Pass = i
};
var parser = new AsmParser(context);
AssemblePass(context, parser);
if (TheSame(last, context)) break;
last = context;
}
return last;
}
private static void CopyLine(IList<Token> source, IList<Token> target, AsmSymbols symbols, ref int pointer)
{
while (pointer < source.Count) {
var tkn = source[pointer++];
if (tkn.Type == TokenType.NewLine) {
target.Add(tkn);
break;
}
IList<Token> replaced;
if (symbols.SymbolicConstants.TryGetValue(tkn.StringValue, out replaced)) {
foreach (var repl in replaced) {
if (repl.Type != TokenType.NewLine) {
var item = repl;
item.Position = tkn.Position;
target.Add(item);
}
}
} else {
target.Add(tkn);
}
}
}
protected IList<Token> ProcessSymbolConstants(IList<Token> tokens, AsmSymbols symbols)
{
var result = new List<Token>();
for (var i = 0; i < tokens.Count; ) {
var nameToken = tokens[i++];
if (i < tokens.Count) {
var equToken = tokens[i];
if (equToken.Type == TokenType.Literal && equToken.StringValue.ToLower() == "equ") {
i++;
var meaning = new List<Token>();
CopyLine(tokens, meaning, symbols, ref i);
symbols.SymbolicConstants[nameToken.StringValue] = meaning;
} else {
i--;
CopyLine(tokens, result, symbols, ref i);
}
} else {
i--;
CopyLine(tokens, result, symbols, ref i);
}
}
return result;
}
