Token NextToken()
{
while (ch == ' ' ||
ch >= 9 && ch <= 10 || ch == 13
) NextCh();
if (ch == '#' && Comment0() ||ch == '/' && Comment1()) return NextToken();
t = new Token();
t.pos = pos; t.col = col; t.line = line;
int state;
if (start.ContainsKey(ch)) { state = (int) start[ch]; }
else { state = 0; }
tlen = 0; AddCh();
switch (state) {
case -1: { t.kind = eofSym; break; } // NextCh already done
case 0: { t.kind = noSym; break; } // NextCh already done
case 1:
if (ch >= '0' && ch <= '9') {AddCh(); goto case 2;}
else {t.kind = noSym; break;}
case 2:
if (ch >= '0' && ch <= '9') {AddCh(); goto case 2;}
else {t.kind = 2; break;}
case 3:
{t.kind = 3; break;}
case 4:
{t.kind = 4; break;}
case 5:
{t.kind = 5; break;}
case 6:
if (ch >= 1 && ch <= '!' || ch >= '#' && ch <= 65535) {AddCh(); goto case 7;}
else if (ch == '"') {AddCh(); goto case 8;}
else {t.kind = noSym; break;}
case 7:
if (ch >= 1 && ch <= '!' || ch >= '#' && ch <= 65535) {AddCh(); goto case 7;}
else if (ch == '"') {AddCh(); goto case 8;}
else {t.kind = noSym; break;}
case 8:
{t.kind = 6; break;}
case 9:
if (ch >= 1 && ch <= 8 || ch >= 11 && ch <= 12 || ch >= 14 && ch <= 31 || ch == '!' || ch >= '#' && ch <= 39 || ch >= '*' && ch <= '-' || ch >= '/' && ch <= 65535) {AddCh(); goto case 9;}
else {t.kind = 7; break;}
case 10:
if (ch >= '0' && ch <= '9') {AddCh(); goto case 10;}
else if (ch == '.') {AddCh(); goto case 1;}
else {t.kind = 1; break;}
}
t.val = new String(tval, 0, tlen);
return t;
}
void Init()
{
pos = -1; line = 1; col = 0;
oldEols = 0;
NextCh();
if (ch == 0xEF) { // check optional byte order mark for UTF-8
NextCh(); int ch1 = ch;
NextCh(); int ch2 = ch;
if (ch1 != 0xBB || ch2 != 0xBF) {
throw new FatalError(String.Format("illegal byte order mark: EF {0,2:X} {1,2:X}", ch1, ch2));
}
buffer = new UTF8Buffer(buffer); col = 0;
NextCh();
}
pt = tokens = new Token(); // first token is a dummy
}
// make sure that peeking starts at the current scan position
public void ResetPeek()
{
pt = tokens;
}
// get the next token (possibly a token already seen during peeking)
public Token Scan()
{
if (tokens.next == null) {
return NextToken();
} else {
pt = tokens = tokens.next;
return tokens;
}
}
// peek for the next token, ignore pragmas
public Token Peek()
{
if (pt.next == null) {
do {
pt = pt.next = NextToken();
} while (pt.kind > maxT); // skip pragmas
} else {
do {
pt = pt.next;
} while (pt.kind > maxT);
}
return pt;
}
