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using System;
using System.Collections.Specialized;
using System.Collections.Generic;
namespace Gnu
{
/// <summary>
/// An implementation of the getopt standard, as used by Gnu GetOpt
/// </summary>
public class GetOpt
{
StringCollection m_params = new StringCollection();
StringCollection m_extras = new StringCollection();
List<Arg> m_args = new List<Arg>();
public GetOpt(string[] CommandLineArgs, string ParametersDescription)
{
// Import the string array into the collection
foreach(string s in CommandLineArgs)
{
m_params.Add(s);
}
// Parse the params description
for(int i = 0; i < ParametersDescription.Length; i++)
{
Arg a = new Arg();
a.Flag = ParametersDescription[i];
if((ParametersDescription.Length > i + 1) && (ParametersDescription[i + 1] == ':'))
{
a.TakesParameter = true;
i++;
}
m_args.Add(a);
}
}
public Arg NextArg()
{
SnarfExtras();
if(m_params.Count == 0)
return null;
foreach(Arg a in m_args)
{
if(a.Flag == m_params[0][1] && m_params[0][0] == '-' )
{
Arg matched = a;
try
{
if(a.TakesParameter)
{
matched.Parameter = m_params[1];
m_params.RemoveAt(1);
}
}
catch(Exception)
{
}
m_params.RemoveAt(0);
return matched;
}
}
if(m_params[0][0] == '-')
{
Arg tempa = new Arg();
tempa.Flag = m_params[0][1];
tempa.TakesParameter = false;
return tempa;
}
return null;
}
public StringCollection Extras
{
get
{
SnarfExtras();
return m_extras;
}
}
private void SnarfExtras()
{
// Parameters must start with a hyphen
while((m_params.Count > 0) && (m_params[0][0] != '-'))
{
m_extras.Add(m_params[0]);
m_params.RemoveAt(0);
}
}
}
}
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