blob: 4a2fd0da6d49a015d7120b3a27ca2bb2105bebc9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
//------------------------------------------------------------------------------
// <copyright file="NumericExpr.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------
namespace MS.Internal.Xml.XPath {
using System;
using System.Xml;
using System.Xml.XPath;
using System.Diagnostics;
using System.Globalization;
using System.Xml.Xsl;
internal sealed class NumericExpr : ValueQuery {
private Operator.Op op;
private Query opnd1;
private Query opnd2;
public NumericExpr(Operator.Op op, Query opnd1, Query opnd2) {
Debug.Assert(
op == Operator.Op.PLUS || op == Operator.Op.MINUS ||
op == Operator.Op.MUL || op == Operator.Op.DIV ||
op == Operator.Op.MOD
);
Debug.Assert(opnd1 != null && opnd2 != null);
if (opnd1.StaticType != XPathResultType.Number) {
opnd1 = new NumberFunctions(Function.FunctionType.FuncNumber, opnd1);
}
if (opnd2.StaticType != XPathResultType.Number) {
opnd2 = new NumberFunctions(Function.FunctionType.FuncNumber, opnd2);
}
this.op = op;
this.opnd1 = opnd1;
this.opnd2 = opnd2;
}
private NumericExpr(NumericExpr other) : base(other) {
this.op = other.op;
this.opnd1 = Clone(other.opnd1);
this.opnd2 = Clone(other.opnd2);
}
public override void SetXsltContext(XsltContext context){
opnd1.SetXsltContext(context);
opnd2.SetXsltContext(context);
}
public override object Evaluate(XPathNodeIterator nodeIterator) {
return GetValue(this.op,
XmlConvert.ToXPathDouble(opnd1.Evaluate(nodeIterator)),
XmlConvert.ToXPathDouble(opnd2.Evaluate(nodeIterator))
);
}
private static double GetValue(Operator.Op op, double n1, double n2) {
Debug.Assert(op == Operator.Op.PLUS || op == Operator.Op.MINUS || op == Operator.Op.MOD || op == Operator.Op.DIV || op == Operator.Op.MUL);
switch (op) {
case Operator.Op.PLUS : return n1 + n2;
case Operator.Op.MINUS : return n1 - n2;
case Operator.Op.MOD : return n1 % n2;
case Operator.Op.DIV : return n1 / n2;
case Operator.Op.MUL : return n1 * n2;
}
return 0;
}
public override XPathResultType StaticType { get { return XPathResultType.Number; } }
public override XPathNodeIterator Clone() { return new NumericExpr(this); }
public override void PrintQuery(XmlWriter w) {
w.WriteStartElement(this.GetType().Name);
w.WriteAttributeString("op", op.ToString());
opnd1.PrintQuery(w);
opnd2.PrintQuery(w);
w.WriteEndElement();
}
}
}
|
