public Token Read()
{
this.op = (Operator)null;
this.token = Token.None;
bool flag;
do
{
flag = true;
this.startPos = this.reader.Position;
char c = this.reader.Read();
switch (c)
{
case char.MinValue:
this.token = Token.EOF;
break;
case '\t':
case '\n':
case '\r':
case ' ':
this.ReadWhiteSpaces();
flag = false;
break;
case '"':
this.ReadString('"');
this.CheckToken(Token.StringConst);
break;
case '#':
this.ReadDate();
this.CheckToken(Token.Date);
break;
case '%':
this.op = Operator.Modulo;
this.token = Token.BinaryOp;
break;
case '&':
this.op = Operator.BitwiseAnd;
this.token = Token.BinaryOp;
break;
case '\'':
this.ReadString('\'');
this.CheckToken(Token.StringConst);
break;
case '(':
this.token = Token.LeftParen;
break;
case ')':
this.token = Token.RightParen;
break;
case '*':
this.op = Operator.Multiply;
this.token = Token.BinaryOp;
break;
case '+':
this.op = Operator.Plus;
this.token = Token.BinaryOp;
break;
case ',':
this.token = Token.ListSeparator;
break;
case '-':
this.op = Operator.Minus;
this.token = Token.BinaryOp;
break;
case '.':
if (this.client.PrevOperand == OperandType.None)
{
this.ReadNumber();
break;
}
this.token = Token.Dot;
break;
case '/':
this.op = Operator.Divide;
this.token = Token.BinaryOp;
break;
case '<':
this.token = Token.BinaryOp;
this.ReadWhiteSpaces();
if ('=' == this.reader.Current)
{
this.op = Operator.LessOrEqual;
int num = (int)this.reader.Read();
break;
}
if ('>' == this.reader.Current)
{
this.op = Operator.NotEqual;
int num = (int)this.reader.Read();
break;
}
this.op = Operator.LessThen;
break;
case '=':
this.op = Operator.EqualTo;
this.token = Token.BinaryOp;
break;
case '>':
this.token = Token.BinaryOp;
this.ReadWhiteSpaces();
if ('=' == this.reader.Current)
{
this.op = Operator.GreaterOrEqual;
int num = (int)this.reader.Read();
break;
}
this.op = Operator.GreaterThen;
break;
case '@':
this.token = Token.Parameter;
break;
case '[':
this.ReadName(']', '\\', "]\\");
this.CheckToken(Token.Name);
break;
case '^':
this.op = Operator.BitwiseXor;
this.token = Token.BinaryOp;
break;
case '`':
this.ReadName('`', '`', "`");
this.CheckToken(Token.Name);
break;
case '|':
this.op = Operator.BitwiseOr;
this.token = Token.BinaryOp;
break;
case '~':
this.op = Operator.BitwiseNot;
this.token = Token.BinaryOp;
break;
default:
if ('0' == c && ('x' == this.reader.Current || 'X' == this.reader.Current))
{
int num = (int)this.reader.Read();
this.ReadHex();
this.token = Token.NumericHex;
break;
}
if (char.IsDigit(c))
{
this.ReadNumber();
break;
}
this.ReadReserved();
if (this.token == Token.None)
{
if (char.IsLetter(c) || '_' == c)
{
this.ReadName();
if (this.token != Token.None)
{
this.CheckToken(Token.Name);
break;
}
}
this.token = Token.Unknown;
throw LexicalException.UnknownToken(this.TokenString, this.startPos + 1);
}
break;
}
}while (!flag);
return(this.token);
}
public Token Read()
{
bool toStop = true;
this.op = null;
this.token = Token.None;
do
{
toStop = true;
this.startPos = this.reader.Position;
char ch = this.reader.Read();
switch (ch)
{
case '\0':
this.token = Token.EOF;
break;
case ' ':
case '\t':
case '\n':
case '\r':
this.ReadWhiteSpaces();
toStop = false;
break;
case '(':
this.token = Token.LeftParen;
break;
case ')':
this.token = Token.RightParen;
break;
case '+':
this.op = Operator.Plus;
this.token = Token.BinaryOp;
break;
case '-':
this.op = Operator.Minus;
this.token = Token.BinaryOp;
break;
case '*':
this.op = Operator.Multiply;
this.token = Token.BinaryOp;
break;
case '/':
this.op = Operator.Divide;
this.token = Token.BinaryOp;
break;
case '%':
this.op = Operator.Modulo;
this.token = Token.BinaryOp;
break;
case '&':
this.op = Operator.BitwiseAnd;
this.token = Token.BinaryOp;
break;
case '|':
this.op = Operator.BitwiseOr;
this.token = Token.BinaryOp;
break;
case '^':
this.op = Operator.BitwiseXor;
this.token = Token.BinaryOp;
break;
case '~':
this.op = Operator.BitwiseNot;
this.token = Token.BinaryOp;
break;
case '=':
this.op = Operator.EqualTo;
this.token = Token.BinaryOp;
break;
case '<':
this.token = Token.BinaryOp;
this.ReadWhiteSpaces();
if ('=' == this.reader.Current)
{
this.op = Operator.LessOrEqual;
this.reader.Read();
}
else if ('>' == this.reader.Current)
{
this.op = Operator.NotEqual;
this.reader.Read();
}
else
{
this.op = Operator.LessThen;
}
break;
case '>':
this.token = Token.BinaryOp;
this.ReadWhiteSpaces();
if ('=' == this.reader.Current)
{
this.op = Operator.GreaterOrEqual;
this.reader.Read();
}
else
{
this.op = Operator.GreaterThen;
}
break;
case '#': // date
this.ReadDate();
this.CheckToken(Token.Date);
break;
case '\'': // string const
this.ReadString('\'');
this.CheckToken(Token.StringConst);
break;
case '"': // string const
this.ReadString('"');
this.CheckToken(Token.StringConst);
break;
case '`':
this.ReadName('`', '`', "`");
this.CheckToken(Token.Name);
break;
case '[':
this.ReadName(']', Lexer.Escape, @"]\");
this.CheckToken(Token.Name);
break;
case '.':
if (OperandType.None == this.client.PrevOperand)
{
this.ReadNumber();
}
else
{
this.token = Token.Dot;
}
break;
case ',':
this.token = Token.ListSeparator;
break;
case '@':
this.token = Token.Parameter;
break;
//case '!':
// break;
default:
if ('0' == ch && ('x' == this.reader.Current || 'X' == this.reader.Current))
{
this.reader.Read();
this.ReadHex();
this.token = Token.NumericHex;
}
else if (char.IsDigit(ch))
{
this.ReadNumber();
}
else
{
this.ReadReserved();
if (Token.None == this.token)
{
if (char.IsLetter(ch) || '_' == ch)
{
this.ReadName();
if (Token.None != this.token)
{
this.CheckToken(Token.Name);
break;
}
}
this.token = Token.Unknown;
throw LexicalException.UnknownToken(this.TokenString, this.startPos + 1);
}
}
break;
}
} while (!toStop);
return(this.token);
}
