public List <String> scan(String source_code)
{
NewLine.Add(-1);
List <String> tokens = new List <String>();
for (int i = 0; i < source_code.Length; i++)
{
int count = i;
String defaultstring = "";
if (ScannerClassification.is_letter(source_code[count]))
{
while (count < source_code.Length && (ScannerClassification.is_letter(source_code[count]) || ScannerClassification.is_digit(source_code[count])))
{
defaultstring += source_code[count];
count++;
}
tokens.Add(defaultstring);
i = count - 1;
}
else if (ScannerClassification.is_digit(source_code[count]))
{
int dots = 0;
while (count < source_code.Length && (ScannerClassification.is_digit(source_code[count]) || source_code[count] == '.' || ScannerClassification.is_letter(source_code[count])))
{
if (source_code[count] == '.')
{
dots++;
}
defaultstring += source_code[count];
count++;
}
tokens.Add(defaultstring);
i = count - 1;
}
else if (count != source_code.Length - 1 && ScannerClassification.is_two_operator(source_code[count], source_code[count + 1]))
{
defaultstring += source_code[count];
defaultstring += source_code[count + 1];
if (source_code[count] == '/' && source_code[count + 1] == '/')
{
count = count + 2;
while (count < source_code.Length && source_code[count] != '\n')
{
defaultstring += source_code[count];
++count;
// MessageBox.Show(lex.ToString());
}
}
else if (source_code[count] == '/' && source_code[count + 1] == '*')
{
count = count + 2;
while (count < source_code.Length - 1 && source_code[count] != '*' && source_code[count + 1] != '/')
{
defaultstring += source_code[count];
count += 1;
// MessageBox.Show(lex.ToString());
}
if (count < source_code.Length - 1 && source_code[count] == '*' && source_code[count + 1] == '/')
{
defaultstring += source_code[count];
defaultstring += source_code[count + 1];
count++;
}
}
else
{
count++;
}
// MessageBox.Show(lex.ToString());
i = count;
tokens.Add(defaultstring);
}
else if (ScannerClassification.is_one_operator(source_code[count]))
{
defaultstring += source_code[count];
if (source_code[count] == '"')
{
//string tmp ="";
// tmp += source_code[cur];
++count;
while (count < source_code.Length && source_code[count] != '"' && source_code[count] != '\n' && source_code[count] != ';')
{
defaultstring += source_code[count];
++count;
}
if (source_code[count] == '"')
{
defaultstring += source_code[count];
}
}
i = count;
tokens.Add(defaultstring);
}
else
{
count = i;
if (source_code[count] == ' ' || source_code[count] == '\r' || source_code[count] == '\n')
{
if (source_code[count] == '\n')
{
NewLine.Add(tokens.Count - 1);
}
continue;
}
while (count < source_code.Length && source_code[count] != ' ' && source_code[count] != '\r' && source_code[count] != '\n')
{
defaultstring += source_code[count]; ++count;
}
tokens.Add(defaultstring);
i = count - 1;
}
}
NewLine.Add(tokens.Count - 1);
return(tokens);
}
public string check(string T)
{
T = T.ToLower();
string type = "Error";
if (Classes.ContainsKey(T))
{
type = Classes[T].ToString();
}
else
{
int i = 0;
if (ScannerClassification.is_letter(T[i]))
{
while (i < T.Length && (ScannerClassification.is_letter(T[i]) || ScannerClassification.is_digit(T[i])))
{
i++;
}
if (i == T.Length)
{
type = Token_Class.Identifier.ToString();
}
else
{
i = 0;
}
}
else if (ScannerClassification.is_digit(T[i]))
{
int dots = 0;
while (i < T.Length && (ScannerClassification.is_digit(T[i]) || (T[i] == '.' && dots == 0)))
{
if (T[i] == '.')
{
dots++;
}
++i;
}
if (dots < 2 && i == T.Length)
{
type = Token_Class.number.ToString();
}
}
else if (i <= T.Length - 2 && ScannerClassification.is_two_operator(T[i], T[i + 1]))
{
if (T[i] == '/' && T[i + 1] == '/')
{
type = Token_Class.comment.ToString();
}
else if (T[i] == '/' && T[i + 1] == '*')
{
if (T[T.Length - 2] == '*' && T[T.Length - 1] == '/')
{
type = Token_Class.comment.ToString();
}
else
{
type = Token_Class.Error.ToString();
}
}
else
{
type = Token_Class.two_operator.ToString();
}
}
else if (ScannerClassification.is_one_operator(T[i]))
{
//type = Type.Operator.ToString();
if (T[i] == '"')
{
if (T[T.Length - 1] == '"')
{
type = Token_Class.String.ToString();
}
}
else
{
type = Token_Class.Error.ToString();
}
}
}
return(type);
}
