void CompileMath(XPathMathExpr mathExpr)
{
// are we doing math on two literal numbers? If so, do it at compile time
if (XPathExprType.Number == mathExpr.Right.Type && XPathExprType.Number == mathExpr.Left.Type)
{
double left = ((XPathNumberExpr)mathExpr.Left).Number;
if (((XPathNumberExpr)mathExpr.Left).Negate)
{
((XPathNumberExpr)mathExpr.Left).Negate = false;
left = -left;
}
double right = ((XPathNumberExpr)mathExpr.Right).Number;
if (((XPathNumberExpr)mathExpr.Right).Negate)
{
((XPathNumberExpr)mathExpr.Right).Negate = false;
right = -right;
}
switch (mathExpr.Op)
{
case MathOperator.Div:
left /= right;
break;
case MathOperator.Minus:
left -= right;
break;
case MathOperator.Mod:
left %= right;
break;
case MathOperator.Multiply:
left *= right;
break;
case MathOperator.Plus:
left += right;
break;
}
this.codeBlock.Append(new PushNumberOpcode(left));
return;
}
// Arguments are pushed C style - right to left
this.CompileExpression(mathExpr.Right);
if (ValueDataType.Double != mathExpr.Right.ReturnType)
{
this.CompileTypecast(ValueDataType.Double);
}
this.CompileExpression(mathExpr.Left);
if (ValueDataType.Double != mathExpr.Left.ReturnType)
{
this.CompileTypecast(ValueDataType.Double);
}
this.codeBlock.Append(this.CreateMathOpcode(mathExpr.Op));
}
private void CompileMath(XPathMathExpr mathExpr)
{
if ((XPathExprType.Number != mathExpr.Right.Type) || (XPathExprType.Number != mathExpr.Left.Type))
{
this.CompileExpression(mathExpr.Right);
if (ValueDataType.Double != mathExpr.Right.ReturnType)
{
this.CompileTypecast(ValueDataType.Double);
}
this.CompileExpression(mathExpr.Left);
if (ValueDataType.Double != mathExpr.Left.ReturnType)
{
this.CompileTypecast(ValueDataType.Double);
}
this.codeBlock.Append(this.CreateMathOpcode(mathExpr.Op));
}
else
{
double number = ((XPathNumberExpr)mathExpr.Left).Number;
if (((XPathNumberExpr)mathExpr.Left).Negate)
{
((XPathNumberExpr)mathExpr.Left).Negate = false;
number = -number;
}
double num2 = ((XPathNumberExpr)mathExpr.Right).Number;
if (((XPathNumberExpr)mathExpr.Right).Negate)
{
((XPathNumberExpr)mathExpr.Right).Negate = false;
num2 = -num2;
}
switch (mathExpr.Op)
{
case MathOperator.Plus:
number += num2;
break;
case MathOperator.Minus:
number -= num2;
break;
case MathOperator.Div:
number /= num2;
break;
case MathOperator.Multiply:
number *= num2;
break;
case MathOperator.Mod:
number = number % num2;
break;
}
this.codeBlock.Append(new PushNumberOpcode(number));
}
}
XPathExpr ParseMultiplicativeExpression()
{
XPathExpr leftExpr = this.ParseUnaryExpression();
if (null != leftExpr)
{
MathOperator op;
do
{
op = MathOperator.None;
XPathToken token = this.NextToken();
if (null != token)
{
switch (token.TokenID)
{
default:
this.PushToken(token);
break;
case XPathTokenID.Multiply:
op = MathOperator.Multiply;
break;
case XPathTokenID.Div:
op = MathOperator.Div;
break;
case XPathTokenID.Mod:
op = MathOperator.Mod;
break;
}
if (MathOperator.None != op)
{
XPathExpr rightExpr = this.ParseUnaryExpression();
if (null == rightExpr)
{
this.ThrowError(QueryCompileError.InvalidExpression);
}
leftExpr = new XPathMathExpr(op, leftExpr, rightExpr);
}
}
} while (MathOperator.None != op);
}
return(leftExpr);
}
private XPathExpr ParseMultiplicativeExpression()
{
XPathExpr left = this.ParseUnaryExpression();
if (left != null)
{
MathOperator none;
do
{
none = MathOperator.None;
XPathToken token = this.NextToken();
if (token != null)
{
XPathTokenID tokenID = token.TokenID;
if (tokenID == XPathTokenID.Multiply)
{
none = MathOperator.Multiply;
}
else if (tokenID == XPathTokenID.Mod)
{
none = MathOperator.Mod;
}
else if (tokenID == XPathTokenID.Div)
{
none = MathOperator.Div;
}
else
{
this.PushToken(token);
}
if (none != MathOperator.None)
{
XPathExpr right = this.ParseUnaryExpression();
if (right == null)
{
this.ThrowError(QueryCompileError.InvalidExpression);
}
left = new XPathMathExpr(none, left, right);
}
}
}while (none != MathOperator.None);
}
return(left);
}
private XPathExpr ParseAdditiveExpression()
{
XPathExpr left = this.ParseMultiplicativeExpression();
if (left != null)
{
MathOperator none;
do
{
none = MathOperator.None;
XPathToken token = this.NextToken();
if (token != null)
{
switch (token.TokenID)
{
case XPathTokenID.Plus:
none = MathOperator.Plus;
break;
case XPathTokenID.Minus:
none = MathOperator.Minus;
break;
default:
this.PushToken(token);
break;
}
if (none != MathOperator.None)
{
XPathExpr right = this.ParseMultiplicativeExpression();
if (right == null)
{
this.ThrowError(QueryCompileError.InvalidExpression);
}
left = new XPathMathExpr(none, left, right);
}
}
}while (none != MathOperator.None);
}
return(left);
}
void CompileMath(XPathMathExpr mathExpr)
{
// are we doing math on two literal numbers? If so, do it at compile time
if (XPathExprType.Number == mathExpr.Right.Type && XPathExprType.Number == mathExpr.Left.Type)
{
double left = ((XPathNumberExpr)mathExpr.Left).Number;
if (((XPathNumberExpr)mathExpr.Left).Negate)
{
((XPathNumberExpr)mathExpr.Left).Negate = false;
left = -left;
}
double right = ((XPathNumberExpr)mathExpr.Right).Number;
if (((XPathNumberExpr)mathExpr.Right).Negate)
{
((XPathNumberExpr)mathExpr.Right).Negate = false;
right = -right;
}
switch (mathExpr.Op)
{
case MathOperator.Div:
left /= right;
break;
case MathOperator.Minus:
left -= right;
break;
case MathOperator.Mod:
left %= right;
break;
case MathOperator.Multiply:
left *= right;
break;
case MathOperator.Plus:
left += right;
break;
}
this.codeBlock.Append(new PushNumberOpcode(left));
return;
}
// Arguments are pushed C style - right to left
this.CompileExpression(mathExpr.Right);
if (ValueDataType.Double != mathExpr.Right.ReturnType)
{
this.CompileTypecast(ValueDataType.Double);
}
this.CompileExpression(mathExpr.Left);
if (ValueDataType.Double != mathExpr.Left.ReturnType)
{
this.CompileTypecast(ValueDataType.Double);
}
this.codeBlock.Append(this.CreateMathOpcode(mathExpr.Op));
}
XPathExpr ParseMultiplicativeExpression()
{
XPathExpr leftExpr = this.ParseUnaryExpression();
if (null != leftExpr)
{
MathOperator op;
do
{
op = MathOperator.None;
XPathToken token = this.NextToken();
if (null != token)
{
switch (token.TokenID)
{
default:
this.PushToken(token);
break;
case XPathTokenID.Multiply:
op = MathOperator.Multiply;
break;
case XPathTokenID.Div:
op = MathOperator.Div;
break;
case XPathTokenID.Mod:
op = MathOperator.Mod;
break;
}
if (MathOperator.None != op)
{
XPathExpr rightExpr = this.ParseUnaryExpression();
if (null == rightExpr)
{
this.ThrowError(QueryCompileError.InvalidExpression);
}
leftExpr = new XPathMathExpr(op, leftExpr, rightExpr);
}
}
} while (MathOperator.None != op);
}
return leftExpr;
}
private void CompileMath(XPathMathExpr mathExpr)
{
if ((XPathExprType.Number != mathExpr.Right.Type) || (XPathExprType.Number != mathExpr.Left.Type))
{
this.CompileExpression(mathExpr.Right);
if (ValueDataType.Double != mathExpr.Right.ReturnType)
{
this.CompileTypecast(ValueDataType.Double);
}
this.CompileExpression(mathExpr.Left);
if (ValueDataType.Double != mathExpr.Left.ReturnType)
{
this.CompileTypecast(ValueDataType.Double);
}
this.codeBlock.Append(this.CreateMathOpcode(mathExpr.Op));
}
else
{
double number = ((XPathNumberExpr) mathExpr.Left).Number;
if (((XPathNumberExpr) mathExpr.Left).Negate)
{
((XPathNumberExpr) mathExpr.Left).Negate = false;
number = -number;
}
double num2 = ((XPathNumberExpr) mathExpr.Right).Number;
if (((XPathNumberExpr) mathExpr.Right).Negate)
{
((XPathNumberExpr) mathExpr.Right).Negate = false;
num2 = -num2;
}
switch (mathExpr.Op)
{
case MathOperator.Plus:
number += num2;
break;
case MathOperator.Minus:
number -= num2;
break;
case MathOperator.Div:
number /= num2;
break;
case MathOperator.Multiply:
number *= num2;
break;
case MathOperator.Mod:
number = number % num2;
break;
}
this.codeBlock.Append(new PushNumberOpcode(number));
}
}
private XPathExpr ParseMultiplicativeExpression()
{
XPathExpr left = this.ParseUnaryExpression();
if (left != null)
{
MathOperator none;
do
{
none = MathOperator.None;
XPathToken token = this.NextToken();
if (token != null)
{
XPathTokenID tokenID = token.TokenID;
if (tokenID == XPathTokenID.Multiply)
{
none = MathOperator.Multiply;
}
else if (tokenID == XPathTokenID.Mod)
{
none = MathOperator.Mod;
}
else if (tokenID == XPathTokenID.Div)
{
none = MathOperator.Div;
}
else
{
this.PushToken(token);
}
if (none != MathOperator.None)
{
XPathExpr right = this.ParseUnaryExpression();
if (right == null)
{
this.ThrowError(QueryCompileError.InvalidExpression);
}
left = new XPathMathExpr(none, left, right);
}
}
}
while (none != MathOperator.None);
}
return left;
}
private XPathExpr ParseAdditiveExpression()
{
XPathExpr left = this.ParseMultiplicativeExpression();
if (left != null)
{
MathOperator none;
do
{
none = MathOperator.None;
XPathToken token = this.NextToken();
if (token != null)
{
switch (token.TokenID)
{
case XPathTokenID.Plus:
none = MathOperator.Plus;
break;
case XPathTokenID.Minus:
none = MathOperator.Minus;
break;
default:
this.PushToken(token);
break;
}
if (none != MathOperator.None)
{
XPathExpr right = this.ParseMultiplicativeExpression();
if (right == null)
{
this.ThrowError(QueryCompileError.InvalidExpression);
}
left = new XPathMathExpr(none, left, right);
}
}
}
while (none != MathOperator.None);
}
return left;
}
