private IEnumerable StringMode(Itr itr)
{
if (currentItem.Length == 0)
{
currentItem.Append('"');
}
currentItem.Append(itr.Current());
if (SwitchMode(itr.Mode))
{
yield return(PopString(currentItem));
}
else
{
if (itr.IsFinalIndex())
{
currentItem.Append('"');
yield return(PopString(currentItem));
}
else if ('\\'.Equals(itr.Current()))
{
currentItem.Append(itr.Peek(1));
itr.MoveNext(); //don't check next character since already added
}
}
}
private static string TrimWhiteSpace(string input, Itr itr)
{
if (input == null)
{
throw new NullReferenceException("input cannot be null");
}
return(input.TrimStart());
}
private static bool MatchDoubleSymbolDelimiter(Delimiter[] delimiters, Itr itr)
{
foreach (Delimiter del in delimiters)
{
if (itr == del.toMatch)
{
return(true);
}
}
return(false);
}
private IEnumerable <string> NormalMode(Itr itr)
{
if (!SwitchMode(itr.Mode))
{
if (' '.Equals(itr.Current()))
{
if (currentItem.Length > 0)
{
yield return(PopString(currentItem));
}
}
else if (SplitOnDot(itr))
{
if (currentItem.Length > 0)
{
yield return(PopString(currentItem));
}
yield return(itr.Current().ToString());
}
else if (MatchDoubleSymbolDelimiter(__multi_symbol_delimiters__, itr))
{
if (currentItem.Length > 0)
{
yield return(PopString(currentItem));
}
currentItem.Append(itr.Current());
currentItem.Append(itr.Peek(1));
itr.MoveNext();
}
else if (MatchDelimiter(__Updated_Delimiters__, itr))
{
if (currentItem.Length > 0)
{
yield return(PopString(currentItem));
}
yield return(itr.Current().ToString());
}
else
{
currentItem.Append(itr.Current());
}
if (itr.IsFinalIndex() && currentItem.Length > 0)
{
yield return(PopString(currentItem));
}
}
else if (itr.Current() != ' ' && currentItem.Length > 0)
{
yield return(PopString(currentItem));
}
}
private static bool SplitOnDot(Itr itr)
{
if (itr == ".")
{
if (itr.IsFirstIndex() || itr.Peek(-1) == ' ') //dot is first index or white space
{
if (!itr.IsFinalIndex()) //not final index
{
if (Regex.IsMatch(itr.Peek(1).ToString(), @"[\d]")) //digit
{
return(false);
}
}
}
if (itr.IsFirstIndex() || itr.Peek(-1) == '.')
{
return(true);
}
if (Regex.IsMatch(itr.Peek(-1).ToString(), @"[\d]")) //if it's got a digit before
{
int i = -2;
while (true)
{
if (Regex.IsMatch(itr.Peek(i).ToString(), @"[\D]")) //not a digit
{
if (Regex.IsMatch(itr.Peek(i).ToString(), @"[\w]")) //is a word character
{
return(true);
}
}
if (itr.Index + --i < 0)
{
break;
}
}
}
}
return(false);
}
private static bool MatchDelimiter(Delimiter[] delimiters, Itr itr)
{
foreach (Delimiter del in delimiters)
{
if (itr != del.toMatch)
{
continue;
}
if (del.RegexPostMatch != null)
{
if (itr.IsFinalIndex())
{
return(false);
}
if (!Regex.IsMatch(itr.Peek(1).ToString(), del.RegexPostMatch))
{
continue;
}
}
else if (del.PostMatch != null)
{
var match = false;
foreach (string str in del.PostMatch)
{
if (itr.PeekAndEquals(del.toMatch.Length, str))
{
match = true;
break;
}
}
if (!match)
{
continue;
}
}
if (del.RegexPreMatch != null)
{
if (itr.IsFirstIndex())
{
return(false);
}
if (!Regex.IsMatch(itr.Peek(-1).ToString(), del.RegexPreMatch))
{
continue;
}
}
else if (del.PreMatch != null)
{
var match = false;
foreach (string str in del.PreMatch)
{
if (itr.PeekAndEquals(-str.Length, str))
{
match = true;
break;
}
}
if (!match)
{
continue;
}
}
return(true);
}
return(false);
}
private void CommentMode(Itr itr)
{
SwitchMode(itr.Mode);
}
