public static MemberChain ParseBackward(IntelluaSource source, int pos = -1)
{
const string seperator = ".:";
const string lbracket = "([{";
const string rbracket = ")]}";
const string operators = "=+-*/;";
Byte[] str = source.RawText;
if (pos < 0)
{
pos = source.getRawPos() - 1;
}
PaserState state = PaserState.searchWordEnd;
MemberChain rst = new MemberChain();
int wordStart = pos;
int wordEnd = pos;
int bracketLevel = 0;
bool isFuncion = false;
while (pos >= 0 && pos < str.Length)
{
if (str[pos] > 127)
{
pos--;
continue;
}
char c = Convert.ToChar(str[pos]);
bool isComment = Parser.isComment(source, pos);
bool isString = Parser.isString(source, pos);
switch (state)
{
case PaserState.searchWordStart:
if (isString)
{
return(rst);
}
if (!char.IsLetterOrDigit(c) || isComment || pos == 0)
{
wordStart = pos + 1;
if (pos == 0 && char.IsLetterOrDigit(c))
{
wordStart = 0;
}
Byte[] bword = SubArray(str, wordStart, wordEnd - wordStart + 1);
string word = Encoding.UTF8.GetString(bword); //str.Substring(wordStart, wordEnd - wordStart + 1);
//word.Trim();
{
//int p = source.getRawPos(wordStart);
rst.Elements.Insert(0, new Word(word, isFuncion, wordStart));
isFuncion = false;
rst.StartPos = pos;
}
state = PaserState.searchSeperator;
}
else
{
pos--;
}
break;
case PaserState.searchWordEnd:
if (isComment)
{
pos--;
break;
}
if (isString)
{
return(rst);
}
if (operators.Contains(c))
{
return(rst);
}
if (seperator.Contains(c))
{
if (rst.Elements.Count == 0)
{
//int p = source.getRawPos(pos);
rst.Elements.Add(new Word("", false, pos));
}
}
if (rbracket.Contains(c))
{
if (rst.Elements.Count == 0)
{
//int p = source.getRawPos(pos);
rst.Elements.Add(new Word("", false, pos));
}
state = PaserState.searchBracket;
break;
}
if (char.IsLetterOrDigit(c))
{
wordEnd = pos;
if (rst.EndPos < 0)
{
rst.EndPos = pos;
}
state = PaserState.searchWordStart;
}
else
{
pos--;
}
break;
case PaserState.searchSeperator:
if (isString)
{
return(rst);
}
if (char.IsWhiteSpace(c) || isComment)
{
pos--;
}
else if (seperator.Contains(c))
{
state = PaserState.searchWordEnd;
pos--;
}
else
{
//end
return(rst);
}
break;
case PaserState.searchBracket:
if (!isComment && !isString)
{
if (rbracket.Contains(c))
{
bracketLevel++;
}
else if (lbracket.Contains(c))
{
bracketLevel--;
if (bracketLevel == 0)
{
if (c == '(')
{
isFuncion = true;
}
state = PaserState.searchWordEnd;
}
}
}
pos--;
break;
}
}
return(rst);
}
public static MemberChain ParseFoward(IntelluaSource source, int pos)
{
const string seperator = ".:";
const string lbracket = "([{";
const string rbracket = ")]}";
const string operators = "=+-*/;";
Byte[] str = source.RawText;
PaserState state = PaserState.searchWordStart;
MemberChain rst = new MemberChain();
int wordStart = pos;
int wordEnd = pos;
int bracketLevel = 0;
while (pos < str.Length)
{
if (str[pos] > 127)
{
pos++;
continue;
}
char c = Convert.ToChar(str[pos]);
bool isComment = Parser.isComment(source, pos);
bool isString = Parser.isString(source, pos);
switch (state)
{
case PaserState.searchWordEnd:
if (isString)
{
return(rst);
}
if (!Parser.isIndentifierChar(c) || isComment || pos == str.Length - 1)
{
wordEnd = pos;
string word;
if (pos == str.Length - 1)
{
Byte[] bword = SubArray(str, wordStart, wordEnd - wordStart + 1);
word = Encoding.UTF8.GetString(bword);
}
else
{
Byte[] bword = SubArray(str, wordStart, wordEnd - wordStart);
word = Encoding.UTF8.GetString(bword);
//word = str.Substring(wordStart, wordEnd - wordStart);
}
word.Trim();
{
//int p = wordStart;//source.getRawPos(wordStart);
rst.Elements.Add(new Word(word, false, wordStart));
rst.EndPos = pos;
}
state = PaserState.searchSeperator;
}
else
{
pos++;
}
break;
case PaserState.searchWordStart:
if (isString)
{
return(rst);
}
if (operators.Contains(c))
{
return(rst);
}
if (isComment)
{
pos++;
break;
}
if (Parser.isIndentifierChar(c))
{
wordStart = pos;
if (rst.StartPos < 0)
{
rst.StartPos = pos;
}
state = PaserState.searchWordEnd;
}
else
{
pos++;
}
break;
case PaserState.searchSeperator:
if (isString)
{
return(rst);
}
if (lbracket.Contains(c))
{
if (c == '(')
{
if (rst.Elements.Count > 0)
{
rst.Elements[rst.Elements.Count - 1].IsFunction = true;
}
}
state = PaserState.searchBracket;
break;
}
if (seperator.Contains(c))
{
state = PaserState.searchWordStart;
pos++;
}
else if (char.IsWhiteSpace(c) || isComment)
{
pos++;
}
else
{
//end
return(rst);
}
break;
case PaserState.searchBracket:
if (!isComment && !isString)
{
if (lbracket.Contains(c))
{
bracketLevel++;
}
else if (rbracket.Contains(c))
{
bracketLevel--;
if (bracketLevel == 0)
{
state = PaserState.searchSeperator;
}
}
}
pos++;
break;
}
}
return(rst);
}