Arguments.cs :  » Testing » SystiN » CommandLine » Utility » C# / CSharp Open Source

/*
* Arguments class: application arguments interpreter
*
* Authors:    R. LOPES
* Contributors:  R. LOPES
* Created:    25 October 2002
* Modified:    28 October 2002
*
* Version:    1.0
*/

using System;
using System.Collections.Specialized;
using System.Text.RegularExpressions;

namespace CommandLine.Utility{
  /// <summary>
  /// Arguments class
  /// </summary>
  public class Arguments{
    // Variables
    private StringDictionary Parameters;

    // Constructor
    public Arguments(string[] Args){
      Parameters=new StringDictionary();
      Regex Spliter=new Regex(@"^-{1,2}|^/|=|:",RegexOptions.IgnoreCase|RegexOptions.Compiled);
      Regex Remover= new Regex(@"^['""]?(.*?)['""]?$",RegexOptions.IgnoreCase|RegexOptions.Compiled);
      string Parameter=null;
      string[] Parts;

      // Valid parameters forms:
      // {-,/,--}param{ ,=,:}((",')value(",'))
      // Examples: -param1 value1 --param2 /param3:"Test-:-work" /param4=happy -param5 '--=nice=--'
      foreach(string Txt in Args){
        // Look for new parameters (-,/ or --) and a possible enclosed value (=,:)
        Parts=Spliter.Split(Txt,3);
        switch(Parts.Length){
          // Found a value (for the last parameter found (space separator))
          case 1:
            if(Parameter!=null){
              if(!Parameters.ContainsKey(Parameter)){
                Parts[0]=Remover.Replace(Parts[0],"$1");
                Parameters.Add(Parameter,Parts[0]);
                }
              Parameter=null;
              }
            // else Error: no parameter waiting for a value (skipped)
            break;
          // Found just a parameter
          case 2:
            // The last parameter is still waiting. With no value, set it to true.
            if(Parameter!=null){
              if(!Parameters.ContainsKey(Parameter)) Parameters.Add(Parameter,"true");
              }
            Parameter=Parts[1];
            break;
          // Parameter with enclosed value
          case 3:
            // The last parameter is still waiting. With no value, set it to true.
            if(Parameter!=null){
              if(!Parameters.ContainsKey(Parameter)) Parameters.Add(Parameter,"true");
              }
            Parameter=Parts[1];
            // Remove possible enclosing characters (",')
            if(!Parameters.ContainsKey(Parameter)){
              Parts[2]=Remover.Replace(Parts[2],"$1");
              Parameters.Add(Parameter,Parts[2]);
              }
            Parameter=null;
            break;
          }
        }
      // In case a parameter is still waiting
      if(Parameter!=null){
        if(!Parameters.ContainsKey(Parameter)) Parameters.Add(Parameter,"true");
        }
      }

    // Retrieve a parameter value if it exists
    public string this [string Param]{
      get{
        return(Parameters[Param]);
        }
      }
    }
  }