private static CommandTreeToken ScanLongOption(CommandTreeTokenizerContext context, TextBuffer reader, int position) { reader.Consume('-'); context.AddRemaining('-'); if (reader.ReachedEnd) { // Rest of the arguments are remaining ones. context.Mode = Mode.Remaining; return(new CommandTreeToken(CommandTreeToken.Kind.Remaining, position, "--", "--")); } var name = ScanString(context, reader, new[] { '=', ':' }); // Perform validation of the name. if (name.Value.Length == 0) { throw CommandParseException.LongOptionNameIsMissing(reader, position); } if (name.Value.Length == 1) { throw CommandParseException.LongOptionNameIsOneCharacter(reader, position, name.Value); } if (char.IsDigit(name.Value[0])) { throw CommandParseException.LongOptionNameStartWithDigit(reader, position, name.Value); } for (var index = 0; index < name.Value.Length; index++) { if (!char.IsLetterOrDigit(name.Value[index]) && name.Value[index] != '-' && name.Value[index] != '_') { throw CommandParseException.LongOptionNameContainSymbol(reader, position + 2 + index, name.Value[index]); } } return(new CommandTreeToken(CommandTreeToken.Kind.LongOption, position, name.Value, $"--{name.Value}")); }
private static CommandTreeToken ScanQuotedString(CommandTreeTokenizerContext context, TextBuffer reader) { var position = reader.Position; context.FlushRemaining(); reader.Consume('\"'); var builder = new StringBuilder(); var terminated = false; while (!reader.ReachedEnd) { var character = reader.Peek(); if (character == '\"') { terminated = true; reader.Read(); break; } builder.Append(reader.Read()); } if (!terminated) { var unterminatedQuote = builder.ToString(); var token = new CommandTreeToken(CommandTreeToken.Kind.String, position, unterminatedQuote, $"\"{unterminatedQuote}"); throw CommandParseException.UnterminatedQuote(reader.Original, token); } var quotedString = builder.ToString(); // Add to the context context.AddRemaining(quotedString); return(new CommandTreeToken( CommandTreeToken.Kind.String, position, quotedString, quotedString)); }
private static int ParseToken(CommandTreeTokenizerContext context, TextBuffer reader, int position, int start, List <CommandTreeToken> tokens) { while (reader.Peek() != -1) { if (reader.ReachedEnd) { position += reader.Position - start; break; } var character = reader.Peek(); // Eat whitespace if (char.IsWhiteSpace(character)) { reader.Consume(); continue; } if (character == '-') { // Option tokens.AddRange(ScanOptions(context, reader)); } else { // Command or argument tokens.Add(ScanString(context, reader)); } // Flush remaining tokens context.FlushRemaining(); } return(position); }