private static bool ReadOptionsStop(GetOptContext getOptContext, IEnumerator <string> args)
{
if (getOptContext.OptionsStop)
{
return(false);
}
if (args.Current.Equals(LongPrefix))
{
getOptContext.OptionsStop = true;
return(true);
}
return(false);
}
private static bool ReadShortOptions(GetOptContext getOptContext, IEnumerator <string> args)
{
if (getOptContext.OptionsStop)
{
return(false);
}
if (!args.Current.StartsWith(ShortPrefix))
{
return(false);
}
var option = args.Current.Substring(ShortPrefix.Length);
while (!string.IsNullOrEmpty(option))
{
var optionName = option[0];
var optionValue = option.Substring(1);
var o = FindShortOption(getOptContext.Options, optionName);
if (o == null)
{
throw new Exception($"{ShortPrefix}{optionName} is not an option.");
}
if (o.IsFlag)
{
option = optionValue;
o.SetFlag();
}
else
{
option = string.Empty;
if (string.IsNullOrEmpty(optionValue))
{
args.MoveNext();
optionValue = args.Current;
}
o.Set(optionValue);
}
}
return(true);
}
private static bool ReadLongOption(GetOptContext getOptContext, IEnumerator <string> args)
{
if (getOptContext.OptionsStop)
{
return(false);
}
if (!args.Current.StartsWith(LongPrefix))
{
return(false);
}
var parts = args.Current.Substring(LongPrefix.Length).Split(new[] { '=' }, 2);
var optionName = parts[0];
var o = FindLongOption(getOptContext.Options, optionName);
if (o == null)
{
throw new Exception($"{LongPrefix}{optionName} is not an option.");
}
if (o.IsFlag)
{
o.SetFlag();
}
else
{
string optionValue;
if (parts.Length >= 2)
{
optionValue = parts[1];
}
else
{
args.MoveNext();
optionValue = args.Current;
}
o.Set(optionValue);
}
return(true);
}
/// <summary>
/// Parse args into options
/// </summary>
/// <param name="args"></param>
/// <param name="options"></param>
public static void Parse(IEnumerable <string> args, object options)
{
var context = new GetOptContext(options);
using (var e = args.GetEnumerator())
{
while (e.MoveNext())
{
try
{
ReadOption(context, e);
}
catch (Exception ex)
{
throw new ParseException(args, e, ex);
}
}
}
}
private static void ReadOption(GetOptContext getOptContext, IEnumerator <string> args)
{
if (ReadOptionsStop(getOptContext, args))
{
return;
}
if (ReadLongOption(getOptContext, args))
{
return;
}
if (ReadShortOptions(getOptContext, args))
{
return;
}
if (ReadArgument(getOptContext, args))
{
return;
}
}
private static bool ReadArgument(GetOptContext getOptContext, IEnumerator <string> args)
{
FindOperands(getOptContext.Options).Set(args.Current);
return(true);
}