/// <summary>
/// Parses a single argument.
/// </summary>
/// <param name="parser">An instance of the </param>
/// <param name="testForExtendedArgument"></param>
/// <returns></returns>
private string ParseArgument(TextParser parser, bool testForExtendedArgument)
{
if (QuoteChars.Contains(parser.Peek()))
{
return parser.ParseQuotedText();
}
else
{
// Parse unquoted argument
int start = parser.Position;
while (!parser.EndOfText &&
!Char.IsWhiteSpace(parser.Peek()) &&
!FlagChars.Contains(parser.Peek()) &&
(!testForExtendedArgument || parser.Peek() != ExtendedArgumentDelimiter))
parser.MoveAhead();
return parser.Extract(start, parser.Position);
}
}
/// <summary>
/// Parses a new command line. Populates the Arguments property with the results.
/// </summary>
/// <param name="commandLine">Command line to parse.</param>
/// <param name="supportExtendedArguments">If true, extended arguments are supported in the
/// form /f:filename or filename:mode</param>
public void ParseCommandLine(string commandLine, bool supportExtendedArguments = false)
{
// Parse all arguments on command line
Arguments = new List<CommandLineArgument>();
TextParser parser = new TextParser(commandLine);
while (!parser.EndOfText)
{
// Skip whitespace
parser.MovePastWhitespace();
// Create new argument
CommandLineArgument argument = new CommandLineArgument();
// Determine if this is a flag
argument.IsFlag = FlagChars.Contains(parser.Peek());
if (argument.IsFlag)
parser.MoveAhead();
// Parse argument
argument.Argument = ParseArgument(parser, supportExtendedArguments);
// Parse extended argument
if (parser.Peek() == ExtendedArgumentDelimiter)
{
parser.MoveAhead();
argument.ExtendedArgument = ParseArgument(parser, false);
}
// Add to list of arguments if not empty
if (!String.IsNullOrWhiteSpace(argument.Argument))
Arguments.Add(argument);
}
}
