public bool TheSame(AsmSection other)
{
if (other == null) return false;
if (Content.Count != other.Content.Count) return false;
for (var i = 0; i < Content.Count; i++) {
if (Content[i] != other.Content[i]) return false;
}
return true;
}
private static void ProcessReserveWords(AsmParser parser, AsmSection output)
{
var cnt = parser.CalculateExpression();
output.ReserveBytes((int)cnt * 2);
}
private static void ProcessOrg(AsmParser parser, AsmSection output)
{
var val = parser.CalculateExpression();
output.Offset = (int)val;
}
private static void ProcessDataWords(AsmParser parser, AsmSection output)
{
do {
if (parser.IsEndOfLine) {
throw new TokenException("expected data words", parser.LastReadToken);
}
var token = parser.PeekToken();
if (token.Type == TokenType.String) {
token = parser.ReadToken(TokenType.String);
foreach (var ch in token.StringValue) {
output.EmitWord(ch);
}
} else {
var val = parser.ReadUshort();
output.EmitWord(val);
}
if (parser.IsEndOfLine) break;
var commaPreview = parser.PeekToken();
if (commaPreview.Type != TokenType.Comma) break;
parser.ReadToken(TokenType.Comma);
} while (true);
}
private static void ProcessDataDirective(Token token, AsmParser parser, AsmSection output)
{
switch (token.StringValue.ToLower()) {
case "db":
ProcessDataBytes(parser, output);
break;
case "dw":
ProcessDataWords(parser, output);
break;
case "rb":
ProcessReserveBytes(parser, output);
break;
case "rw":
ProcessReserveWords(parser, output);
break;
default:
throw new TokenException("invalid directive " + token.StringValue, token);
}
}
private static void ProcessDataBytes(AsmParser parser, AsmSection output)
{
do {
if (parser.IsEndOfLine) {
throw new TokenException("expected data bytes", parser.LastReadToken);
}
var token = parser.PeekToken();
if (token.Type == TokenType.String) {
token = parser.ReadToken(TokenType.String);
foreach (var ch in token.StringValue) {
if (ch > 255) {
throw new TokenException("unicode character cannot be translated to byte", token);
}
output.EmitByte((byte)ch);
}
} else {
var val = parser.ReadByte();
output.EmitByte(val);
}
if (parser.IsEndOfLine) break;
var commaPreview = parser.PeekToken();
if (commaPreview.Type != TokenType.Comma) break;
parser.ReadToken(TokenType.Comma);
} while (true);
}
