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
}
Token NextToken()
{
while (ch == ' ' ||
ch == 9
) NextCh();
int apx = 0;
int recKind = noSym;
int recEnd = pos;
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: {
if (recKind != noSym) {
tlen = recEnd - t.pos;
SetScannerBehindT();
}
t.kind = recKind; break;
} // NextCh already done
case 1:
recEnd = pos; recKind = 1;
if (ch == 39 || ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 1;}
else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}
case 2:
recEnd = pos; recKind = 1;
if (ch == 39 || ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 2;}
else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}
case 3:
if (ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 41;}
else if (ch >= '0' && ch <= '9') {AddCh(); goto case 42;}
else if (ch == 39) {AddCh(); goto case 3;}
else {goto case 0;}
case 4:
recEnd = pos; recKind = 2;
if (ch == 39 || ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 4;}
else {t.kind = 2; break;}
case 5:
{
tlen -= apx;
SetScannerBehindT();
t.kind = 3; break;}
case 6:
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 7;}
else {goto case 0;}
case 7:
recEnd = pos; recKind = 3;
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 7;}
else if (ch == 'L' || ch == 'l') {AddCh(); goto case 8;}
else {t.kind = 3; break;}
case 8:
{t.kind = 3; break;}
case 9:
recEnd = pos; recKind = 4;
if (ch >= '0' && ch <= '9') {AddCh(); goto case 9;}
else if (ch == 'D' || ch == 'F' || ch == 'd' || ch == 'f') {AddCh(); goto case 20;}
else if (ch == 'E' || ch == 'e') {AddCh(); goto case 10;}
else {t.kind = 4; break;}
case 10:
if (ch >= '0' && ch <= '9') {AddCh(); goto case 12;}
else if (ch == '+' || ch == '-') {AddCh(); goto case 11;}
else {goto case 0;}
case 11:
if (ch >= '0' && ch <= '9') {AddCh(); goto case 12;}
else {goto case 0;}
case 12:
recEnd = pos; recKind = 4;
if (ch >= '0' && ch <= '9') {AddCh(); goto case 12;}
else if (ch == 'D' || ch == 'F' || ch == 'd' || ch == 'f') {AddCh(); goto case 20;}
else {t.kind = 4; break;}
case 13:
recEnd = pos; recKind = 4;
if (ch >= '0' && ch <= '9') {AddCh(); goto case 13;}
else if (ch == 'D' || ch == 'F' || ch == 'd' || ch == 'f') {AddCh(); goto case 20;}
else if (ch == 'E' || ch == 'e') {AddCh(); goto case 14;}
else {t.kind = 4; break;}
case 14:
if (ch >= '0' && ch <= '9') {AddCh(); goto case 16;}
else if (ch == '+' || ch == '-') {AddCh(); goto case 15;}
else {goto case 0;}
case 15:
if (ch >= '0' && ch <= '9') {AddCh(); goto case 16;}
else {goto case 0;}
case 16:
recEnd = pos; recKind = 4;
if (ch >= '0' && ch <= '9') {AddCh(); goto case 16;}
else if (ch == 'D' || ch == 'F' || ch == 'd' || ch == 'f') {AddCh(); goto case 20;}
else {t.kind = 4; break;}
case 17:
if (ch >= '0' && ch <= '9') {AddCh(); goto case 19;}
else if (ch == '+' || ch == '-') {AddCh(); goto case 18;}
else {goto case 0;}
case 18:
if (ch >= '0' && ch <= '9') {AddCh(); goto case 19;}
else {goto case 0;}
case 19:
recEnd = pos; recKind = 4;
if (ch >= '0' && ch <= '9') {AddCh(); goto case 19;}
else if (ch == 'D' || ch == 'F' || ch == 'd' || ch == 'f') {AddCh(); goto case 20;}
else {t.kind = 4; break;}
case 20:
{t.kind = 4; break;}
case 21:
if (ch <= 9 || ch >= 11 && ch <= 12 || ch >= 14 && ch <= '!' || ch >= '#' && ch <= '[' || ch >= ']' && ch <= 65535) {AddCh(); goto case 21;}
else if (ch == '"') {AddCh(); goto case 26;}
else if (ch == 92) {AddCh(); goto case 43;}
else {goto case 0;}
case 22:
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 23;}
else {goto case 0;}
case 23:
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 24;}
else {goto case 0;}
case 24:
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 25;}
else {goto case 0;}
case 25:
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 21;}
else {goto case 0;}
case 26:
{t.kind = 5; break;}
case 27:
if (ch == 39) {AddCh(); goto case 32;}
else {goto case 0;}
case 28:
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 29;}
else {goto case 0;}
case 29:
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 30;}
else {goto case 0;}
case 30:
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 31;}
else {goto case 0;}
case 31:
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 27;}
else {goto case 0;}
case 32:
{t.kind = 6; break;}
case 33:
recEnd = pos; recKind = 7;
if (ch == '!' || ch >= '$' && ch <= '&' || ch >= '+' && ch <= '.' || ch == ':' || ch >= '<' && ch <= '@' || ch == 92 || ch == '^' || ch == '`' || ch == '|' || ch == '~') {AddCh(); goto case 33;}
else {t.kind = 7; break;}
case 34:
recEnd = pos; recKind = 8;
if (ch >= '(' && ch <= ')' || ch == '[' || ch == ']' || ch == '{' || ch == '}') {AddCh(); goto case 34;}
else {t.kind = 8; break;}
case 35:
{t.kind = 9; break;}
case 36:
recEnd = pos; recKind = 3;
if (ch >= '0' && ch <= '9') {AddCh(); goto case 36;}
else if (ch == 'L' || ch == 'l') {AddCh(); goto case 8;}
else if (ch == '.') {apx++; AddCh(); goto case 45;}
else if (ch == 'E' || ch == 'e') {AddCh(); goto case 17;}
else if (ch == 'D' || ch == 'F' || ch == 'M' || ch == 'd' || ch == 'f' || ch == 'm') {AddCh(); goto case 20;}
else {t.kind = 3; break;}
case 37:
if (ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 46;}
else if (ch <= 9 || ch >= 11 && ch <= 12 || ch >= 14 && ch <= '&' || ch >= '(' && ch <= '@' || ch == '[' || ch >= ']' && ch <= '^' || ch == '`' || ch >= '{' && ch <= 65535) {AddCh(); goto case 27;}
else if (ch == 92) {AddCh(); goto case 44;}
else {goto case 0;}
case 38:
recEnd = pos; recKind = 3;
if (ch >= '0' && ch <= '9') {AddCh(); goto case 36;}
else if (ch == 'L' || ch == 'l') {AddCh(); goto case 8;}
else if (ch == '.') {apx++; AddCh(); goto case 45;}
else if (ch == 'X' || ch == 'x') {AddCh(); goto case 6;}
else if (ch == 'E' || ch == 'e') {AddCh(); goto case 17;}
else if (ch == 'D' || ch == 'F' || ch == 'M' || ch == 'd' || ch == 'f' || ch == 'm') {AddCh(); goto case 20;}
else {t.kind = 3; break;}
case 39:
recEnd = pos; recKind = 7;
if (ch >= '1' && ch <= '9') {AddCh(); goto case 36;}
else if (ch == '0') {AddCh(); goto case 38;}
else if (ch == '!' || ch >= '$' && ch <= '&' || ch >= '+' && ch <= '-' || ch == ':' || ch >= '<' && ch <= '@' || ch == 92 || ch == '^' || ch == '`' || ch == '|' || ch == '~') {AddCh(); goto case 33;}
else if (ch == '.') {AddCh(); goto case 40;}
else {t.kind = 7; break;}
case 40:
recEnd = pos; recKind = 7;
if (ch >= '0' && ch <= '9') {AddCh(); goto case 9;}
else if (ch == '!' || ch >= '$' && ch <= '&' || ch >= '+' && ch <= '.' || ch == ':' || ch >= '<' && ch <= '@' || ch == 92 || ch == '^' || ch == '`' || ch == '|' || ch == '~') {AddCh(); goto case 33;}
else {t.kind = 7; break;}
case 41:
recEnd = pos; recKind = 1;
if (ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 41;}
else if (ch >= '0' && ch <= '9') {AddCh(); goto case 42;}
else if (ch == 39) {AddCh(); goto case 3;}
else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}
case 42:
recEnd = pos; recKind = 1;
if (ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 41;}
else if (ch >= '0' && ch <= '9') {AddCh(); goto case 42;}
else if (ch == 39) {AddCh(); goto case 3;}
else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}
case 43:
if (ch == '"' || ch == 39 || ch == '0' || ch == 92 || ch == 'b' || ch == 'n' || ch == 'r' || ch == 't') {AddCh(); goto case 21;}
else if (ch == 'u') {AddCh(); goto case 22;}
else {goto case 0;}
case 44:
if (ch == '"' || ch == 39 || ch == '0' || ch == 92 || ch == 'b' || ch == 'n' || ch == 'r' || ch == 't') {AddCh(); goto case 27;}
else if (ch == 'u') {AddCh(); goto case 28;}
else {goto case 0;}
case 45:
if (ch <= '/' || ch >= ':' && ch <= 65535) {apx++; AddCh(); goto case 5;}
else if (ch >= '0' && ch <= '9') {apx = 0; AddCh(); goto case 13;}
else {goto case 0;}
case 46:
recEnd = pos; recKind = 1;
if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 3;}
else if (ch == 39) {AddCh(); goto case 47;}
else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}
case 47:
recEnd = pos; recKind = 6;
if (ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 41;}
else if (ch >= '0' && ch <= '9') {AddCh(); goto case 42;}
else if (ch == 39) {AddCh(); goto case 3;}
else {t.kind = 6; break;}
case 48:
{t.kind = 10; break;}
case 49:
{t.kind = 11; break;}
case 50:
{t.kind = 12; break;}
case 51:
{t.kind = 13; break;}
case 52:
{t.kind = 14; break;}
case 53:
{t.kind = 20; break;}
case 54:
{t.kind = 21; break;}
case 55:
recEnd = pos; recKind = 19;
if (ch == 39 || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 2;}
else {t.kind = 19; break;}
case 56:
recEnd = pos; recKind = 16;
if (ch == '*') {AddCh(); goto case 48;}
else if (ch == '/') {AddCh(); goto case 50;}
else {t.kind = 16; break;}
case 57:
recEnd = pos; recKind = 15;
if (ch == '/') {AddCh(); goto case 49;}
else {t.kind = 15; break;}
case 58:
recEnd = pos; recKind = 7;
if (ch == '!' || ch >= '$' && ch <= '&' || ch >= '+' && ch <= '.' || ch == ':' || ch >= '<' && ch <= '@' || ch == 92 || ch == '^' || ch == '`' || ch == '|' || ch == '~') {AddCh(); goto case 33;}
else if (ch == '[') {AddCh(); goto case 51;}
else {t.kind = 7; break;}
case 59:
recEnd = pos; recKind = 8;
if (ch >= '(' && ch <= ')' || ch == '[' || ch == ']' || ch == '{' || ch == '}') {AddCh(); goto case 34;}
else if (ch == '>') {AddCh(); goto case 52;}
else {t.kind = 8; break;}
}
t.val = new String(tval, 0, tlen);
return t;
}
// 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;
}
}
// make sure that peeking starts at the current scan position
public void ResetPeek()
{
pt = tokens;
}
// peek for the next token, ignore pragmas
public Token Peek()
{
do {
if (pt.next == null) {
pt.next = NextToken();
}
pt = pt.next;
} while (pt.kind > maxT); // skip pragmas
return pt;
}
void Get()
{
for (;;) {
t = la;
la = scanner.Scan();
if (la.kind <= maxT) { ++errDist; break; }
la = t;
}
}
public void Parse()
{
la = new Token();
la.val = "";
Get();
Ela();
Expect(0);
}