public static bool ParseArgs(string input, out CommandPart[] args)
{
string ignored;
return Parse(input, out ignored, out args, false);
}
private static bool Parse(string input, out string command, out CommandPart[] args, bool parseCommand)
{
CommandParserPart currentPart = parseCommand ? CommandParserPart.CommandName : CommandParserPart.None;
int startPosition = 0;
int endPosition = 0;
int inputLength = input.Length;
bool isEscaped = false;
List<CommandPart> argList = new List<CommandPart>();
command = null;
args = null;
if (input == "")
return false;
while (endPosition < inputLength)
{
char currentChar = input[endPosition++];
if (isEscaped)
isEscaped = false;
else if (currentChar == '\\')
isEscaped = true;
switch (currentPart)
{
case CommandParserPart.CommandName:
if ((!isEscaped && currentChar == ' ') || endPosition >= inputLength)
{
int length = (currentChar == ' ' ? endPosition - 1 : endPosition) - startPosition;
string temp = input.Substring(startPosition, length);
if (temp == "")
startPosition = endPosition;
else
{
currentPart = CommandParserPart.None;
command = temp;
startPosition = endPosition;
}
}
break;
case CommandParserPart.None:
if ((!isEscaped && currentChar == '\"'))
{
currentPart = CommandParserPart.DoubleQuotedParameter;
startPosition = endPosition;
}
else if ((!isEscaped && currentChar == '\''))
{
currentPart = CommandParserPart.QuotedParameter;
startPosition = endPosition;
}
else if ((!isEscaped && currentChar == ' ') || endPosition >= inputLength)
{
int length = (currentChar == ' ' ? endPosition - 1 : endPosition) - startPosition;
string temp = input.Substring(startPosition, length);
if (temp == "")
startPosition = endPosition;
else
{
currentPart = CommandParserPart.None;
argList.Add(new CommandPart(temp, startPosition));
startPosition = endPosition;
}
}
break;
case CommandParserPart.QuotedParameter:
if ((!isEscaped && currentChar == '\''))
{
string temp = input.Substring(startPosition, endPosition - startPosition - 1);
currentPart = CommandParserPart.None;
argList.Add(new CommandPart(temp, startPosition));
startPosition = endPosition;
}
else if (endPosition >= inputLength)
return false;
break;
case CommandParserPart.DoubleQuotedParameter:
if ((!isEscaped && currentChar == '\"'))
{
string temp = input.Substring(startPosition, endPosition - startPosition - 1);
currentPart = CommandParserPart.None;
argList.Add(new CommandPart(temp, startPosition));
startPosition = endPosition;
}
else if (endPosition >= inputLength)
return false;
break;
}
}
if (parseCommand && (command == null || command == ""))
return false;
args = argList.ToArray();
return true;
}
public static bool Parse(string input, out string command, out CommandPart[] args)
{
return Parse(input, out command, out args, true);
}