using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

public static class Test
{
	private static Regex qoutesRegex = new Regex("(?<!\\\\)\\\"", RegexOptions.Compiled);
	
	public static IEnumerable<string> Split(this string str, 
                                            Func<char, bool> controller)
    {
        int nextPiece = 0;

        for (int c = 0; c < str.Length; c++)
        {
            if (controller(str[c]))
            {
                yield return str.Substring(nextPiece, c - nextPiece);
                nextPiece = c + 1;
            }
        }

        yield return str.Substring(nextPiece);
    }
   
	
public static IEnumerable<string> SplitCommandLine(string commandLine)
{
    bool inQuotes = false;
    bool isEscaping = false;

    return commandLine.Split(c => {
        if (c == '\\' && !isEscaping) { isEscaping = true; return false; }

        if (c == '\"' && !isEscaping)
            inQuotes = !inQuotes;

        isEscaping = false;

        return !inQuotes && Char.IsWhiteSpace(c)/*c == ' '*/;
        })
        .Select(arg => arg.Trim())
        .Select(arg => qoutesRegex.Replace(arg, "").Replace("\\\"", "\""))
        .Where(arg => !string.IsNullOrEmpty(arg));
	}
	
	public static void Main()
	{
		IEnumerable<string> tests = new List<string> (){
			"\"He whispered to her \\\"I love you\\\".\"",
			"\"C:\\Program Files\"", 
			"\"He whispered to her \\\"I love you\\\".\"", 
			"a\" \\\"asdsd \\\"dsdsd AAA\"b",
			"\" \\\"asdsd \\\"dsdsd \"basds",
			"sdsd\" \\\"asdsd \\\"dsdsd \"",
			"\"A\\\"asdsd \\\"dsdsdA\""
			};
		foreach (var test in tests){
			foreach(var s in SplitCommandLine(test)){
				Console.WriteLine("Param `{0}`",s);
			}
			Console.WriteLine("-----------------");
		}
	}
}