private static bool ParseArgument(string[] args, ref int argIndex, ParameterSetter setter)
{
var name = args[argIndex];
var value = argIndex + 1 < args.Length ? args[argIndex + 1] : null;
string?message = null;
if (value != null && setter(value, out message))
{
argIndex++;
return(true);
}
if (value == null || value.StartsWith("-") || ProcessingParameters.IsValueLikeToMkvFilePath(value))
{
Console.WriteLine("Invalid command-line arguments:");
Console.WriteLine($"Option {name} must be followed by its value");
return(false);
}
argIndex++;
Console.WriteLine($"Invalid value \"{value}\" of command-line option {name}:");
Console.WriteLine(message);
return(false);
}
private static ProcessingParameters?ParseCommandLineArguments(string[] args)
{
var parameters = new ProcessingParameters();
for (var i = 0; i < args.Length; i++)
{
var arg = args[i].Trim();
switch (arg.ToLowerInvariant())
{
case "-m":
case "--mode":
if (!ParseArgument(args, ref i, parameters.TrySetCpuOnlyMode))
{
return(null);
}
break;
case "-i":
case "--implementation":
if (!ParseArgument(args, ref i, parameters.TrySetImplementation))
{
return(null);
}
break;
case "-s":
case "--startTime":
if (!ParseArgument(args, ref i, parameters.TrySetStartTime))
{
return(null);
}
break;
case "-e":
case "--endTime":
if (!ParseArgument(args, ref i, parameters.TrySetEndTime))
{
return(null);
}
break;
default:
if (!parameters.TrySetMkvPath(arg, out var message))
{
Console.WriteLine($"Invalid command-line argument \"{arg}\":");
if (arg.StartsWith("-") && !ProcessingParameters.IsValueLikeToMkvFilePath(arg))
{
message = "Unknown option " + arg;
}
Console.WriteLine(message);
return(null);
}
break;
}
}
return(parameters);
}