private void ParseMultiOptionsArg(string curArg, ArgumentScanner argsScanner, List <CommandLineArgument> result)
{
for (var i = 1; i < curArg.Length; ++i)
{
var ch = curArg[i];
var option = GetOptionOrNull(ch);
if (option == null)
{
throw new InvalidArgumentsException($"Argument at position {argsScanner.Index} contains unrecognized character: {DecorateCharacter( curArg, i )}.");
}
if (!option.HasValue)
{
AddCharOption(result, option, argsScanner.Index, curArg, i, null);
continue;
}
if (i != curArg.Length - 1 || !argsScanner.HasNext || argsScanner.Next.StartsWith("-"))
{
throw new InvalidArgumentsException($"Error in argument at position {argsScanner.Index}: flag -{curArg[i]} requires a value.");
}
argsScanner.MoveNext();
AddCharOption(result, option, argsScanner.Index - 1, curArg, i, argsScanner.Current);
}
}
public CommandLineArgument[] Parse(string[] args)
{
if (args.Length < 1)
{
throw new ArgumentException("The args[0] must contain the initiator command.");
}
var result = new List <CommandLineArgument>();
var argsScanner = new ArgumentScanner(args);
argsScanner.MoveNext();
while (argsScanner.MoveNext())
{
var curArg = argsScanner.Current;
if (curArg == null)
{
throw new ArgumentNullException($"{nameof( args )}[{argsScanner.Index}]");
}
if (curArg.StartsWith("--"))
{
ParseOptionArg(curArg, argsScanner, result);
continue;
}
if (curArg.StartsWith("-"))
{
ParseMultiOptionsArg(curArg, argsScanner, result);
continue;
}
throw new InvalidArgumentsException($"Unrecognized argument at position {argsScanner.Index}: \"{curArg}\".");
}
for (var i = 0; i < result.Count; ++i)
{
var opi = result[i];
if (!opi.Option.Many)
{
continue;
}
for (var j = i + 1; j < result.Count; ++j)
{
var opj = result[j];
if (opj.Option == opi.Option)
{
throw new InvalidArgumentsException($"Flag {opi.Nickname} can be specified only once, but was found at positions {opi.ArgIndex} and {opj.ArgIndex}.");
}
}
}
return(result.ToArray());
}
private void ParseOptionArg(string curArg, ArgumentScanner argsScanner, List <CommandLineArgument> result)
{
var option = GetOptionOrNull(curArg.Substring(2));
if (option == null)
{
throw new InvalidArgumentsException($"Unrecognized argument at position {argsScanner.Index}: \"{curArg}\".");
}
if (!option.HasValue)
{
AddNamedOption(result, option, argsScanner.Index, curArg, null);
return;
}
if (!argsScanner.HasNext || argsScanner.Next.StartsWith("-"))
{
throw new InvalidArgumentsException($"Error in argument at position {argsScanner.Index}: flag {curArg} requires a value.");
}
argsScanner.MoveNext();
AddNamedOption(result, option, argsScanner.Index - 1, curArg, argsScanner.Current);
}