/// <summary>
/// Parse command line
/// </summary>
/// <param name="commandLine">Command line</param>
/// <returns></returns>
public static IEnumerable <CommandToken> Parse(string commandLine)
{
CommandToken lastToken = null;
for (int index = 0, count = commandLine.Length; index < count;)
{
switch (commandLine[index])
{
case ' ':
{
lastToken = CommandSpaceToken.Parse(commandLine, ref index);
yield return(lastToken);
break;
}
case '"':
case '\'':
{
if (lastToken is CommandQuoteToken quote)
{
// "'"
if (quote.Value[0] != commandLine[index])
{
goto default;
}
}
lastToken = CommandQuoteToken.Parse(commandLine, ref index);
yield return(lastToken);
break;
}
default:
{
lastToken = CommandStringToken.Parse(commandLine, ref index,
lastToken is CommandQuoteToken quote ? quote : null);
yield return(lastToken);
break;
}
}
}
}
/// <summary>
/// Parse command line spaces
/// </summary>
/// <param name="commandLine">Command line</param>
/// <param name="index">Index</param>
/// <param name="quote">Quote (could be null)</param>
/// <returns>CommandSpaceToken</returns>
internal static CommandStringToken Parse(string commandLine, ref int index, CommandQuoteToken quote)
{
int end;
int offset = index;
if (quote != null)
{
var ix = index;
do
{
end = commandLine.IndexOf(quote.Value[0], ix + 1);
if (end == -1)
{
throw new ArgumentException("String not closed");
}
if (IsScaped(commandLine, end - 1))
{
ix = end;
end = -1;
}
}while (end < 0);
}
else
{
end = commandLine.IndexOf(' ', index + 1);
}
if (end == -1)
{
end = commandLine.Length;
}
var ret = new CommandStringToken(offset, commandLine.Substring(index, end - index));
index += end - index;
return(ret);
}