Exemplo n.º 1
0
 public void Parse(Stream stream)
 {
     sw = new StreamWriter(stream);
     la = new Token();
     la.val = "";
     Get();
     Rules();
     sw.Flush();
 }
Exemplo n.º 2
0
		public void Init(Stream s) {
			buffer = new Buffer();
			buffer.Fill(s);
			pos = -1; line = 1; lineStart = 0;
			oldEols = 0;
			NextCh();
			ignore = new BitArray(charSetSize + 1);
			ignore[9] = true; ignore[10] = true; ignore[13] = true; ignore[32] = true; 
			
			//--- AW: fill token list
			tokens = new Token();  // first token is a dummy
			Token node = tokens;
			do {
				node.next = NextToken();
				node = node.next;
			} while (node.kind != eofSym);	/* AW: 0 == EOF */
			node.next = node;
			node.val = "EOF";
			t = pt = tokens;
		}
Exemplo n.º 3
0
		/* AW 2003-03-11 to make sure peek start at current scan position */
		public void ResetPeek () { pt = t; }
Exemplo n.º 4
0
		/* AW 2003-03-07 get the next token, ignore pragmas */
		public Token Peek () {
			do {                      // skip pragmas while peeking
				pt = pt.next;
			} while (pt.kind > maxT);
			return pt;
		}
Exemplo n.º 5
0
		/* AW 2003-03-07 get the next token, move on and synch peek token with current */
		public Token Scan () {
			t = pt = t.next;
			return t;
		}
Exemplo n.º 6
0
		/* AW Scan() renamed to NextToken() */
		private Token NextToken() {
			while (ignore[ch]) NextCh();
			if (ch == '/' && Comment0()) return NextToken();
			t = new Token();
			t.pos = pos; t.col = pos - lineStart + 1; t.line = line; 
			int state = start[ch];
			StringBuilder buf = new StringBuilder(16);
			buf.Append(ch); NextCh();
		
			switch (state) 
			{
				case -1: { t.kind = eofSym; goto done; } // NextCh already done /* pdt */
				case 0: { t.kind = noSym; goto done; }   // NextCh already done
				case 1:
				{t.kind = 1; goto done;}
				case 2:
				{t.kind = 2; goto done;}
				case 3:
				{t.kind = 3; goto done;}
				case 4:
					if (ch == '>') {buf.Append(ch); NextCh(); goto case 5;}
					else {t.kind = noSym; goto done;}
				case 5:
				{t.kind = 4; goto done;}
				case 6:
				{t.kind = 5; goto done;}
				case 7:
				{t.kind = 6; goto done;}
				case 8:
				{t.kind = 7; goto done;}
				case 9:
					if ((ch >= '*' && ch <= '+' || ch >= '-' && ch <= ':' || ch >= 'A' && ch <= 'Z' || ch == 92 || ch == '_' || ch >= 'a' && ch <= 'z')) {buf.Append(ch); NextCh(); goto case 9;}
					else {t.kind = 8; goto done;}
				case 10:
				{t.kind = 9; goto done;}
				case 11:
				{t.kind = 10; goto done;}
				case 12:
					if ((ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z')) {buf.Append(ch); NextCh(); goto case 13;}
					else {t.kind = noSym; goto done;}
				case 13:
					if ((ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z')) {buf.Append(ch); NextCh(); goto case 13;}
					else {t.kind = 17; goto done;}
				case 14:
				{t.kind = 11; goto done;}
				case 15:
				{t.kind = 12; goto done;}
				case 16:
				{t.kind = 13; goto done;}
				case 17:
				{t.kind = 14; goto done;}
				case 18:
				{t.kind = 15; goto done;}
			}
			done: 
				t.val = buf.ToString();
			return t;
		}
Exemplo n.º 7
0
		private void Get () {
			for (;;) 
			{
				t = la;
				la = scanner.Scan();
				if (la.kind <= maxT) { ++errDist; break; }
				if (la.kind == 17) 
				{
					if (la.val.Equals("#DIRECTION_FORWARD")) direction = "forward";	
					else if (la.val.Equals("#DIRECTION_BACKWARD")) direction = "backward";
					else if (la.val.Equals("#DIRECTION_BIDIRECTIONAL")) direction = "bidirectional";
					else Console.Error.WriteLine("unknown pragma :" + la.val);
				
				}

				la = t;
			}
		}