using System.Collections.Specialized;
using System.Text.RegularExpressions;
/// <summary>
/// Parses the command line arguments into a name/value collection
/// </summary>
public class CommandLineArgumentParser
{
#region Fields
private StringDictionary parameters;
#endregion
#region Constructors
/// <summary>
/// Initializes a new instance of the <see cref="CommandLineArgumentParser"/> class.
/// </summary>
/// <param name="args">command-line arguments
/// </param>
public CommandLineArgumentParser(string[] args)
{
this.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 (!this.parameters.ContainsKey(parameter))
{
parts[0] = remover.Replace(parts[0], "$1");
this.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 (!this.parameters.ContainsKey(parameter))
{
this.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 (!this.parameters.ContainsKey(parameter))
{
this.parameters.Add(parameter, "true");
}
}
parameter = parts[1];
// Remove possible enclosing characters (",')
if (!this.parameters.ContainsKey(parameter))
{
parts[2] = remover.Replace(parts[2], "$1");
this.parameters.Add(parameter, parts[2]);
}
parameter = null;
break;
}
}
// In case a parameter is still waiting
if (parameter != null)
{
if (!this.parameters.ContainsKey(parameter))
{
this.parameters.Add(parameter, "true");
}
}
}
#endregion
#region Properties
/// <summary>
/// Gets a count of command line arguments
/// </summary>
public int Count
{
get
{
return this.parameters.Count;
}
}
/// <summary>
/// Gets the value with the given parameter name
/// </summary>
/// <param name="param">name of the parameter</param>
/// <returns>the value of the parameter</returns>
public string this[string param]
{
get
{
return this.parameters[param];
}
}
#endregion
}