[Stackoverflow] https://stackoverflow.com/questions/298830 TestResults

test_298830.cs

List<int> err = new List<int>();

void Main()
{
	Mikescher("^\\\\").Dump();

	Test("Atif Aziz (749653)", AtifAziz);
	Test("Jeffrey L Whitledge (298968)", JeffreyLWhitledge);
	Test("Daniel Earwicker (298990)", DanielEarwicker);
	Test("Anton (299795)", Anton);
	Test("CS. (467313)", CS);
	Test("Vapour in the Alley (2132004)", VapourintheAlley);
	Test("Monoman (7774211)", Monoman);
	Test("Thomas Petersson (19091999)", ThomasPetersson);
	Test("Fabio Iotti (19725880)", FabioIotti);
	Test("ygoe (23961658)", ygoe);
	Test("Kevin Thach (24829691)", KevinThach);
	Test("Lucas De Jesus (31621370)", LucasDeJesus);
	Test("HarryP (48008872)", HarryP);
	Test("TylerY86 (53290784)", TylerY86);
	Test("Louis Somers (55903304)", LouisSomers);
	Test("user2126375 (58233585)", user2126375);
	Test("DilipNannaware (59131568)", DilipNannaware);
	Test("Mikescher (this)", Mikescher);
}

void Test(string name, Func<string, IEnumerable<string>> m)
{
	err.Clear();
	
	Test( 0, m, "One",                    new[] { "One" });
	Test( 1, m, "One ",                   new[] { "One" });
	Test( 2, m, " One",                   new[] { "One" });
	Test( 3, m, " One ",                  new[] { "One" });
	Test( 4, m, "One Two",                new[] { "One", "Two" });
	Test( 5, m, "One  Two",               new[] { "One", "Two" });
	Test( 6, m, "One   Two",              new[] { "One", "Two" });
	Test( 7, m, "\"One Two\"",            new[] { "One Two" });
	Test( 8, m, "One \"Two Three\"",      new[] { "One", "Two Three" });
	Test( 9, m, "One \"Two Three\" Four", new[] { "One", "Two Three", "Four" });
	Test(10, m, "One=\"Two Three\" Four", new[] { "One=Two Three", "Four" });
	Test(11, m, "One\"Two Three\" Four",  new[] { "OneTwo Three", "Four" });
	Test(12, m, "One\"Two Three   Four",  new[] { "OneTwo Three   Four" });
	Test(13, m, "\"One Two\"",            new[] { "One Two" });
	Test(14, m, "One\" \"Two",            new[] { "One Two" });
	Test(15, m, "\"One\"  \"Two\"",       new[] { "One", "Two" });
	Test(16, m, "One\\\"  Two",           new[] { "One\"", "Two" });
	Test(17, m, "\\\"One\\\"  Two",       new[] { "\"One\"", "Two" });
	Test(18, m, "One\"",                  new[] { "One" });
	Test(19, m, "\"One",                  new[] { "One" });
	Test(20, m, "One \"\"",               new[] { "One", "" });
	Test(21, m, "One \"",                 new[] { "One", "" });
	Test(22, m, "1 A=\"B C\"=D 2",        new[] { "1", "A=B C=D", "2" });
	Test(23, m, "1 A=\"B \\\" C\"=D 2",   new[] { "1", "A=B \" C=D", "2" });
	Test(24, m, "1 \\A 2",                new[] { "1", "\\A", "2" });
	Test(25, m, "1 \\\" 2",               new[] { "1", "\"", "2" });
	Test(26, m, "1 \\\\\" 2",             new[] { "1", "\\\"", "2" });
	Test(27, m, "\"",                     new[] { "" });
	Test(28, m, "\\\"",                   new[] { "\"" });
	Test(29, m, "'A B'",                  new[] { "'A", "B'" });
	Test(30, m, "^",                      new[] { "^" });
	Test(31, m, "^A",                     new[] { "A" });
	Test(32, m, "^^",                     new[] { "^" });
	Test(33, m, "\\^^",                   new[] { "\\^" });
	Test(34, m, "^\\\\", new[] { "\\\\" });
	Test(35, m, "^\"A B\"", new[] { "A B" });

	// Test cases Anton

	Test(36, m, @"/src:""C:\tmp\Some Folder\Sub Folder"" /users:""[email protected]"" tasks:""SomeTask,Some Other Task"" -someParam foo", new[] { @"/src:C:\tmp\Some Folder\Sub Folder", @"/users:[email protected]", @"tasks:SomeTask,Some Other Task", @"-someParam", @"foo" });

	// Test cases Daniel Earwicker 

	Test(37, m, "", new string[] { });
	Test(38, m, "a", new[] { "a" });
	Test(39, m, " abc ", new[] { "abc" });
	Test(40, m, "a b ", new[] { "a", "b" });
	Test(41, m, "a b \"c d\"", new[] { "a", "b", "c d" });

	// Test cases Fabio Iotti 

	Test(42, m, "this is a test ", new[] { "this", "is", "a", "test" });
	Test(43, m, "this \"is a\" test", new[] { "this", "is a", "test" });

	// Test cases Kevin Thach

	Test(44, m, "\"C:\\Program Files\"", new[] { "C:\\Program Files" });
	Test(45, m, "\"He whispered to her \\\"I love you\\\".\"", new[] { "He whispered to her \"I love you\"." });

	$"{name,-29} | {string.Join(", ", err)}".Dump();
}

void Test(int id, Func<string, IEnumerable<string>> m, string cmd, string[] r)
{
	try
	{
		var sr = m(cmd).ToArray();
		if (r.Length != sr.Length)
		{
			err.Add(id);
			return;
		}
		for (int i = 0; i < r.Length; i++) 
			if (r[i] != sr[i])
			{
				err.Add(id);
				return;
			}
	}
	catch (Exception ex)
	{
		err.Add(id);
		return;
	}
}

[DllImport("shell32.dll", SetLastError = true)]
static extern IntPtr CommandLineToArgvW(
	[MarshalAs(UnmanagedType.LPWStr)] string lpCmdLine, out int pNumArgs);

public static string[] AtifAziz(string commandLine)
{
	int argc;
	var argv = CommandLineToArgvW(commandLine, out argc);
	if (argv == IntPtr.Zero)
		throw new System.ComponentModel.Win32Exception();
	try
	{
		var args = new string[argc];
		for (var i = 0; i < args.Length; i++)
		{
			var p = Marshal.ReadIntPtr(argv, i * IntPtr.Size);
			args[i] = Marshal.PtrToStringUni(p);
		}

		return args;
	}
	finally
	{
		Marshal.FreeHGlobal(argv);
	}
}

static string[] JeffreyLWhitledge(string commandLine)
{
	char[] parmChars = commandLine.ToCharArray();
	bool inQuote = false;
	for (int index = 0; index < parmChars.Length; index++)
	{
		if (parmChars[index] == '"')
			inQuote = !inQuote;
		if (!inQuote && parmChars[index] == ' ')
			parmChars[index] = '\n';
	}
	return (new string(parmChars)).Split('\n');
}

public static IEnumerable<string> DanielEarwicker(string commandLine)
{
	bool inQuotes = false;

	return DanielEarwicker_Split(commandLine, c =>
							 {
								 if (c == '\"')
									 inQuotes = !inQuotes;

								 return !inQuotes && c == ' ';
							 })
					  .Select(arg => DanielEarwicker_TrimMatchingQuotes(arg.Trim(), '\"'))
					  .Where(arg => !string.IsNullOrEmpty(arg));
}

public static IEnumerable<string> DanielEarwicker_Split(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 string DanielEarwicker_TrimMatchingQuotes(string input, char quote)
{
	if ((input.Length >= 2) &&
		(input[0] == quote) && (input[input.Length - 1] == quote))
		return input.Substring(1, input.Length - 2);

	return input;
}

private String[] Anton(String argumentString)
{
	StringBuilder translatedArguments = new StringBuilder(argumentString);
	bool escaped = false;
	for (int i = 0; i < translatedArguments.Length; i++)
	{
		if (translatedArguments[i] == '"')
		{
			escaped = !escaped;
		}
		if (translatedArguments[i] == ' ' && !escaped)
		{
			translatedArguments[i] = '\n';
		}
	}

	string[] toReturn = translatedArguments.ToString().Split(new char[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);
	for (int i = 0; i < toReturn.Length; i++)
	{
		toReturn[i] = Anton_RemoveMatchingQuotes(toReturn[i]);
	}
	return toReturn;
}

public static string Anton_RemoveMatchingQuotes(string stringToTrim)
{
	int firstQuoteIndex = stringToTrim.IndexOf('"');
	int lastQuoteIndex = stringToTrim.LastIndexOf('"');
	while (firstQuoteIndex != lastQuoteIndex)
	{
		stringToTrim = stringToTrim.Remove(firstQuoteIndex, 1);
		stringToTrim = stringToTrim.Remove(lastQuoteIndex - 1, 1); //-1 because we've shifted the indicies left by one
		firstQuoteIndex = stringToTrim.IndexOf('"');
		lastQuoteIndex = stringToTrim.LastIndexOf('"');
	}
	return stringToTrim;
}

public static string[] CS(String argumentString)
{
	StringBuilder translatedArguments = new StringBuilder(argumentString).Replace("\\\"", "\r");
	bool InsideQuote = false;
	for (int i = 0; i < translatedArguments.Length; i++)
	{
		if (translatedArguments[i] == '"')
		{
			InsideQuote = !InsideQuote;
		}
		if (translatedArguments[i] == ' ' && !InsideQuote)
		{
			translatedArguments[i] = '\n';
		}
	}

	string[] toReturn = translatedArguments.ToString().Split(new char[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);
	for (int i = 0; i < toReturn.Length; i++)
	{
		toReturn[i] = CS_RemoveMatchingQuotes(toReturn[i]);
		toReturn[i] = toReturn[i].Replace("\r", "\"");
	}
	return toReturn;
}

public static string CS_RemoveMatchingQuotes(string stringToTrim)
{
	int firstQuoteIndex = stringToTrim.IndexOf('"');
	int lastQuoteIndex = stringToTrim.LastIndexOf('"');
	while (firstQuoteIndex != lastQuoteIndex)
	{
		stringToTrim = stringToTrim.Remove(firstQuoteIndex, 1);
		stringToTrim = stringToTrim.Remove(lastQuoteIndex - 1, 1); //-1 because we've shifted the indicies left by one
		firstQuoteIndex = stringToTrim.IndexOf('"');
		lastQuoteIndex = stringToTrim.LastIndexOf('"');
	}
	return stringToTrim;
}

public static string[] VapourintheAlley(string commandLine)
{
	var parmChars = commandLine.ToCharArray();
	var inSingleQuote = false;
	var inDoubleQuote = false;
	for (var index = 0; index < parmChars.Length; index++)
	{
		if (parmChars[index] == '"' && !inSingleQuote)
		{
			inDoubleQuote = !inDoubleQuote;
			parmChars[index] = '\n';
		}
		if (parmChars[index] == '\'' && !inDoubleQuote)
		{
			inSingleQuote = !inSingleQuote;
			parmChars[index] = '\n';
		}
		if (!inSingleQuote && !inDoubleQuote && parmChars[index] == ' ')
			parmChars[index] = '\n';
	}
	return (new string(parmChars)).Split(new[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);
}

public static IEnumerable<string> Monoman(string commandLine)
{
	if (string.IsNullOrWhiteSpace(commandLine))
		yield break;

	var sb = new StringBuilder();
	bool inQuote = false;
	foreach (char c in commandLine)
	{
		if (c == '"' && !inQuote)
		{
			inQuote = true;
			continue;
		}

		if (c != '"' && !(char.IsWhiteSpace(c) && !inQuote))
		{
			sb.Append(c);
			continue;
		}

		if (sb.Length > 0)
		{
			var result = sb.ToString();
			sb.Clear();
			inQuote = false;
			yield return result;
		}
	}

	if (sb.Length > 0)
		yield return sb.ToString();
}

public static IEnumerable<string> ThomasPetersson(string CmdLine)
{
	var re = @"\G(""((""""|[^""])+)""|(\S+)) *";
	var ms = Regex.Matches(CmdLine, re);
	var list = ms.Cast<Match>()
				 .Select(m => Regex.Replace(
					 m.Groups[2].Success
						 ? m.Groups[2].Value
						 : m.Groups[4].Value, @"""""", @"""")).ToArray();
	return list;
}

public static string[] FabioIotti(string args)
{
	char[] parmChars = args.ToCharArray();
	bool inSingleQuote = false;
	bool inDoubleQuote = false;
	bool escaped = false;
	bool lastSplitted = false;
	bool justSplitted = false;
	bool lastQuoted = false;
	bool justQuoted = false;

	int i, j;

	for (i = 0, j = 0; i < parmChars.Length; i++, j++)
	{
		parmChars[j] = parmChars[i];

		if (!escaped)
		{
			if (parmChars[i] == '^')
			{
				escaped = true;
				j--;
			}
			else if (parmChars[i] == '"' && !inSingleQuote)
			{
				inDoubleQuote = !inDoubleQuote;
				parmChars[j] = '\n';
				justSplitted = true;
				justQuoted = true;
			}
			else if (parmChars[i] == '\'' && !inDoubleQuote)
			{
				inSingleQuote = !inSingleQuote;
				parmChars[j] = '\n';
				justSplitted = true;
				justQuoted = true;
			}
			else if (!inSingleQuote && !inDoubleQuote && parmChars[i] == ' ')
			{
				parmChars[j] = '\n';
				justSplitted = true;
			}

			if (justSplitted && lastSplitted && (!lastQuoted || !justQuoted))
				j--;

			lastSplitted = justSplitted;
			justSplitted = false;

			lastQuoted = justQuoted;
			justQuoted = false;
		}
		else
		{
			escaped = false;
		}
	}

	if (lastQuoted)
		j--;

	return (new string(parmChars, 0, j)).Split(new[] { '\n' });
}

public string[] ygoe(string argsString)
{
	// Collects the split argument strings
	List<string> args = new List<string>();
	// Builds the current argument
	var currentArg = new StringBuilder();
	// Indicates whether the last character was a backslash escape character
	bool escape = false;
	// Indicates whether we're in a quoted range
	bool inQuote = false;
	// Indicates whether there were quotes in the current arguments
	bool hadQuote = false;
	// Remembers the previous character
	char prevCh = '\0';
	// Iterate all characters from the input string
	for (int i = 0; i < argsString.Length; i++)
	{
		char ch = argsString[i];
		if (ch == '\\' && !escape)
		{
			// Beginning of a backslash-escape sequence
			escape = true;
		}
		else if (ch == '\\' && escape)
		{
			// Double backslash, keep one
			currentArg.Append(ch);
			escape = false;
		}
		else if (ch == '"' && !escape)
		{
			// Toggle quoted range
			inQuote = !inQuote;
			hadQuote = true;
			if (inQuote && prevCh == '"')
			{
				// Doubled quote within a quoted range is like escaping
				currentArg.Append(ch);
			}
		}
		else if (ch == '"' && escape)
		{
			// Backslash-escaped quote, keep it
			currentArg.Append(ch);
			escape = false;
		}
		else if (char.IsWhiteSpace(ch) && !inQuote)
		{
			if (escape)
			{
				// Add pending escape char
				currentArg.Append('\\');
				escape = false;
			}
			// Accept empty arguments only if they are quoted
			if (currentArg.Length > 0 || hadQuote)
			{
				args.Add(currentArg.ToString());
			}
			// Reset for next argument
			currentArg.Clear();
			hadQuote = false;
		}
		else
		{
			if (escape)
			{
				// Add pending escape char
				currentArg.Append('\\');
				escape = false;
			}
			// Copy character from input, no special meaning
			currentArg.Append(ch);
		}
		prevCh = ch;
	}
	// Save last argument
	if (currentArg.Length > 0 || hadQuote)
	{
		args.Add(currentArg.ToString());
	}
	return args.ToArray();
}

public static IEnumerable<string> KevinThach(string commandLine)
{
	bool inQuotes = false;
	bool isEscaping = false;

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

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

		isEscaping = false;

		return !inQuotes && Char.IsWhiteSpace(c)/*c == ' '*/;
	})
		.Select(arg => KevinThach_TrimMatchingQuotes(arg.Trim(), '\"').Replace("\\\"", "\""))
		.Where(arg => !string.IsNullOrEmpty(arg));
}

public static IEnumerable<string> KevinThach_Split(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 string KevinThach_TrimMatchingQuotes(string input, char quote)
{
	if ((input.Length >= 2) &&
		(input[0] == quote) && (input[input.Length - 1] == quote))
		return input.Substring(1, input.Length - 2);

	return input;
}

string[] LucasDeJesus(string str) => LucasDeJesus_(str, out _);

string[] LucasDeJesus_(string str, out int argumentos)
{
	string[] linhaComando = new string[32];
	bool entre_aspas = false;
	int posicao_ponteiro = 0;
	int argc = 0;
	int inicio = 0;
	int fim = 0;
	string sub;

	for (int i = 0; i < str.Length;)
	{
		if (entre_aspas)
		{
			// Está entre aspas
			sub = str.Substring(inicio + 1, fim - (inicio + 1));
			linhaComando[argc - 1] = sub;

			posicao_ponteiro += ((fim - posicao_ponteiro) + 1);
			entre_aspas = false;
			i = posicao_ponteiro;
		}
		else
		{
		tratar_aspas:
			if (str.ElementAt(i) == '\"')
			{
				inicio = i;
				fim = str.IndexOf('\"', inicio + 1);
				entre_aspas = true;
				argc++;
			}
			else
			{
				// Se não for aspas, então ler até achar o primeiro espaço em branco
				if (str.ElementAt(i) == ' ')
				{
					if (str.ElementAt(i + 1) == '\"')
					{
						i++;
						goto tratar_aspas;
					}

					// Pular os espaços em branco adiconais
					while (str.ElementAt(i) == ' ') i++;

					argc++;
					inicio = i;
					fim = str.IndexOf(' ', inicio);
					if (fim == -1) fim = str.Length;
					sub = str.Substring(inicio, fim - inicio);
					linhaComando[argc - 1] = sub;
					posicao_ponteiro += (fim - posicao_ponteiro);

					i = posicao_ponteiro;
					if (posicao_ponteiro == str.Length) break;
				}
				else
				{
					argc++;
					inicio = i;
					fim = str.IndexOf(' ', inicio);
					if (fim == -1) fim = str.Length;

					sub = str.Substring(inicio, fim - inicio);
					linhaComando[argc - 1] = sub;
					posicao_ponteiro += fim - posicao_ponteiro;
					i = posicao_ponteiro;
					if (posicao_ponteiro == str.Length) break;
				}
			}
		}
	}

	argumentos = argc;

	return linhaComando;
}

public static IEnumerable<String> HarryP(string commandLine)
{
	Char quoteChar = '"';
	Char escapeChar = '\\';
	Boolean insideQuote = false;
	Boolean insideEscape = false;

	StringBuilder currentArg = new StringBuilder();

	// needed to keep "" as argument but drop whitespaces between arguments
	Int32 currentArgCharCount = 0;

	for (Int32 i = 0; i < commandLine.Length; i++)
	{
		Char c = commandLine[i];
		if (c == quoteChar)
		{
			currentArgCharCount++;

			if (insideEscape)
			{
				currentArg.Append(c);       // found \" -> add " to arg
				insideEscape = false;
			}
			else if (insideQuote)
			{
				insideQuote = false;        // quote ended
			}
			else
			{
				insideQuote = true;         // quote started
			}
		}
		else if (c == escapeChar)
		{
			currentArgCharCount++;

			if (insideEscape)   // found \\ -> add \\ (only \" will be ")
				currentArg.Append(escapeChar + escapeChar);

			insideEscape = !insideEscape;
		}
		else if (Char.IsWhiteSpace(c))
		{
			if (insideQuote)
			{
				currentArgCharCount++;
				currentArg.Append(c);       // append whitespace inside quote
			}
			else
			{
				if (currentArgCharCount > 0)
					yield return currentArg.ToString();

				currentArgCharCount = 0;
				currentArg.Clear();
			}
		}
		else
		{
			currentArgCharCount++;
			if (insideEscape)
			{
				// found non-escaping backslash -> add \ (only \" will be ")
				currentArg.Append(escapeChar);
				currentArgCharCount = 0;
				insideEscape = false;
			}
			currentArg.Append(c);
		}
	}

	if (currentArgCharCount > 0)
		yield return currentArg.ToString();
}

private static readonly Regex RxWinArgs
  = new Regex("([^\\s\"]+\"|((?<=\\s|^)(?!\"\"(?!\"))\")+)(\"\"|.*?)*\"[^\\s\"]*|[^\\s]+",
	RegexOptions.Compiled
	| RegexOptions.Singleline
	| RegexOptions.ExplicitCapture
	| RegexOptions.CultureInvariant);

internal static IEnumerable<string> TylerY86(string args)
{
	var match = RxWinArgs.Match(args);

	while (match.Success)
	{
		yield return match.Value;
		match = match.NextMatch();
	}
}

public static string[] LouisSomers(string commandLine)
{
	List<string> args = new List<string>();
	List<char> currentArg = new List<char>();
	char? quoteSection = null; // Keeps track of a quoted section (and the type of quote that was used to open it)
	char[] quoteChars = new[] { '\'', '\"' };
	char previous = ' '; // Used for escaping double quotes

	for (var index = 0; index < commandLine.Length; index++)
	{
		char c = commandLine[index];
		if (quoteChars.Contains(c))
		{
			if (previous == c) // Escape sequence detected
			{
				previous = ' '; // Prevent re-escaping
				if (!quoteSection.HasValue)
				{
					quoteSection = c; // oops, we ended the quoted section prematurely
					continue;         // don't add the 2nd quote (un-escape)
				}

				if (quoteSection.Value == c)
					quoteSection = null; // appears to be an empty string (not an escape sequence)
			}
			else if (quoteSection.HasValue)
			{
				if (quoteSection == c)
					quoteSection = null; // End quoted section
			}
			else
				quoteSection = c; // Start quoted section
		}
		else if (char.IsWhiteSpace(c))
		{
			if (!quoteSection.HasValue)
			{
				args.Add(new string(currentArg.ToArray()));
				currentArg.Clear();
				previous = c;
				continue;
			}
		}

		currentArg.Add(c);
		previous = c;
	}

	if (currentArg.Count > 0)
		args.Add(new string(currentArg.ToArray()));

	return args.ToArray();
}

public static IList<string> user2126375(string commandLineArgsString)
{
	List<string> args = new List<string>();

	commandLineArgsString = commandLineArgsString.Trim();
	if (commandLineArgsString.Length == 0)
		return args;

	int index = 0;
	while (index != commandLineArgsString.Length)
	{
		args.Add(user2126375_ReadOneArgFromCommandLineArgsString(commandLineArgsString, ref index));
	}

	return args;
}

private static string user2126375_ReadOneArgFromCommandLineArgsString(string line, ref int index)
{
	if (index >= line.Length)
		return string.Empty;

	var sb = new StringBuilder(512);
	int state = 0;
	while (true)
	{
		char c = line[index];
		index++;
		switch (state)
		{
			case 0: //string outside quotation marks
				if (c == '\\') //possible escaping character for quotation mark otherwise normal character
				{
					state = 1;
				}
				else if (c == '"') //opening quotation mark for string between quotation marks
				{
					state = 2;
				}
				else if (c == ' ') //closing arg
				{
					return sb.ToString();
				}
				else
				{
					sb.Append(c);
				}

				break;
			case 1: //possible escaping \ for quotation mark or normal character
				if (c == '"') //If escaping quotation mark only quotation mark is added into result
				{
					state = 0;
					sb.Append(c);
				}
				else // \ works as not-special character
				{
					state = 0;
					sb.Append('\\');
					index--;
				}

				break;
			case 2: //string between quotation marks
				if (c == '"') //quotation mark in string between quotation marks can be escape mark for following quotation mark or can be ending quotation mark for string between quotation marks
				{
					state = 3;
				}
				else if (c == '\\') //escaping \ for possible following quotation mark otherwise normal character
				{
					state = 4;
				}
				else //text in quotation marks
				{
					sb.Append(c);
				}

				break;
			case 3: //quotation mark in string between quotation marks
				if (c == '"') //Quotation mark after quotation mark - that means that this one is escaped and can added into result and we will stay in string between quotation marks state
				{
					state = 2;
					sb.Append(c);
				}
				else //we had two consecutive quotation marks - this means empty string but the following chars (until space) will be part of same arg result as well
				{
					state = 0;
					index--;
				}

				break;
			case 4: //possible escaping \ for quotation mark or normal character in string between quotation marks
				if (c == '"') //If escaping quotation mark only quotation mark added into result
				{
					state = 2;
					sb.Append(c);
				}
				else
				{
					state = 2;
					sb.Append('\\');
					index--;
				}

				break;
		}

		if (index == line.Length)
			return sb.ToString();
	}
}

static string[] DilipNannaware(string commandLine)
{
	var isLastCharSpace = false;
	char[] parmChars = commandLine.ToCharArray();
	bool inQuote = false;
	for (int index = 0; index < parmChars.Length; index++)
	{
		if (parmChars[index] == '"')
			inQuote = !inQuote;
		if (!inQuote && parmChars[index] == ' ' && !isLastCharSpace)
			parmChars[index] = '\n';

		isLastCharSpace = parmChars[index] == '\n' || parmChars[index] == ' ';
	}

	return (new string(parmChars)).Split('\n');
}

public static IEnumerable<string> Mikescher(string commandLine)
{
	var result = new StringBuilder();

	var quoted = false;
	var escaped = false;
	var started = false;
	var allowcaret = false;
	for (int i = 0; i < commandLine.Length; i++)
	{
		var chr = commandLine[i];

		if (chr == '^' && !quoted)
		{
			if (allowcaret)
			{
				result.Append(chr);
				started = true;
				escaped = false;
				allowcaret = false;
			}
			else if (i + 1 < commandLine.Length && commandLine[i + 1] == '^')
			{
				allowcaret = true;
			}
			else if (i + 1 == commandLine.Length)
			{
				result.Append(chr);
				started = true;
				escaped = false;
			}
		}
		else if (escaped)
		{
			result.Append(chr);
			started = true;
			escaped = false;
		}
		else if (chr == '"')
		{
			quoted = !quoted;
			started = true;
		}
		else if (chr == '\\' && i + 1 < commandLine.Length && commandLine[i + 1] == '"')
		{
			escaped = true;
		}
		else if (chr == ' ' && !quoted)
		{
			if (started) yield return result.ToString();
			result.Clear();
			started = false;
		}
		else
		{
			result.Append(chr);
			started = true;
		}
	}

	if (started) yield return result.ToString();
}