private static int ParseTokenString(TokenStringRegistry registry, int offset, string eval, TokenString returnString)
{
TokenString currentString = new TokenString();
// Eat the TOKEN_START
offset += TOKEN_START.Length;
while (offset < eval.Length)
{
// Find the next TOKEN_START, comma, or TOKEN_END
int tokenStartOffset = eval.IndexOf(TOKEN_START, offset);
int commaOffset = eval.IndexOf(',', offset);
int tokenEndOffset = eval.IndexOf(TOKEN_END, offset);
if (tokenStartOffset > -1)
{
commaOffset = (commaOffset == -1) ? eval.Length : commaOffset;
tokenEndOffset = (tokenEndOffset == -1) ? eval.Length : tokenEndOffset;
}
else if (commaOffset > -1)
{
tokenEndOffset = (tokenEndOffset == -1) ? eval.Length : tokenEndOffset;
}
if ((tokenStartOffset > -1) && ((tokenStartOffset < commaOffset) && (tokenStartOffset < tokenEndOffset)))
{
// If it's TOKEN_START, add this run to the current string, and call recursively
TokenString newString = new TokenString();
currentString.Add(eval.Substring(offset, tokenStartOffset - offset));
offset = ParseTokenString(registry, tokenStartOffset, eval, newString);
currentString.Add(newString);
}
else if ((commaOffset > -1) && (commaOffset < tokenEndOffset))
{
// If it's a comma, add this run to the current string and start a new string
currentString.Add(eval.Substring(offset, commaOffset - offset));
returnString.AddArgument(currentString);
currentString = new TokenString();
offset = commaOffset + 1;
}
else
{
// If it's a TOKEN_END, add this run to the current string and return
currentString.Add(eval.Substring(offset, tokenEndOffset - offset));
returnString.AddArgument(currentString);
returnString.Token = registry.NewObject(returnString.Name);
return tokenEndOffset + 1;
}
}
return offset;
}
public static TokenString Parse(TokenStringRegistry registry, string eval)
{
TokenString newString = new TokenString();
int offset = 0;
while (offset < eval.Length)
{
int tokenStartOffset = eval.IndexOf(TOKEN_START, offset);
if (tokenStartOffset == -1)
{
newString.Add(eval.Substring(offset, eval.Length - offset));
offset = eval.Length;
}
else
{
TokenString innerNewString = new TokenString();
newString.Add(eval.Substring(offset, tokenStartOffset - offset));
offset = ParseTokenString(registry, tokenStartOffset, eval, innerNewString);
newString.Add(innerNewString);
}
}
return newString;
}