/// <summary>
/// Lexem was found, create token
/// </summary>
private void processCurrent()
{
if (current == "")
{
return;
}
else
{
int code;
if (SyntaxTable.containsPoint(current) == -1)
{
error(i);
}
if (current == ".")
{
token.addToken(1, SyntaxTable.isOperation(current));
current = "";
return;
}
if (SyntaxTable.isNumber(current))
{
if (SyntaxTable.containsPoint(current) == 1)
{
code = table.newIdentifier(current);
token.addToken(4, code);
current = "";
return;
}
else
{
code = table.newIdentifier(current);
token.addToken(5, code);
current = "";
return;
}
}
code = SyntaxTable.isOperation(current);
if (code > -1)
{
token.addToken(1, code);
current = "";
return;
}
code = SyntaxTable.isKeyword(current);
if (code > -1)
{
token.addToken(2, code);
current = "";
return;
}
else
{
code = table.newIdentifier(current);
token.addToken(3, code);
current = "";
return;
}
}
}
public string tokenStringBuilder(int type, int value)
{
switch (type)
{
case 1: return("operator:" + SyntaxTable.operation(value));
case 2: return("keyword:" + SyntaxTable.keyword(value));
case 3: return("identifier:" + table.identifier(value));
case 4: return("floatconstant:" + table.identifier(value));
case 5: return("intconstant:" + table.identifier(value));
default: return("Something went wrong");
}
}
/// <summary>
/// Analyzes code and creates token and identifier tables
/// </summary>
/// <param name="path">file to analize</param>
public TokenTable analyze(String path, out IdentifiersTable ident)
{
text = File.ReadAllText(path);
// analyzing by each character
for (i = 0; i < text.Length; i++)
{
next = Convert.ToString(text[i]);
// space symbol behavior
if (SyntaxTable.isSpaceSymbol(next))
{
processCurrent();
continue;
}
// number check
if (SyntaxTable.isNumber(current))
{
if (SyntaxTable.isNumber(current + next))
{
current += next;
continue;
}
else
{
processCurrent();
current = next;
continue;
}
}
// operator behavior
if (SyntaxTable.isOperation(next) > -1)
{
// complex operation behavior
if (!SyntaxTable.isOperationAllowed(current + next))
{
processCurrent();
current = next;
continue;
}
else
{
current += next;
continue;
}
}
// check if symbol is valid
if (!SyntaxTable.isSymbolAllowed(Convert.ToChar(next)))
{
error(i);
ident = null;
return(null);
}
// check for preceding operator
if (current.Length == 1 &&
(SyntaxTable.isOperation(Convert.ToString(current[0])) > -1))
{
processCurrent();
current = next;
continue;
}
current += next;
}
if (current != "")
{
processCurrent();
}
ident = table;
Console.WriteLine("Lexical analysis complete.");
return(token);
}
