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//------------------------------------------------------------------------------
// <copyright file="LogicalExpr.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 LogicalExpr : ValueQuery {
Operator.Op op;
Query opnd1;
Query opnd2;
public LogicalExpr(Operator.Op op, Query opnd1, Query opnd2) {
Debug.Assert(
Operator.Op.LT == op || Operator.Op.GT == op ||
Operator.Op.LE == op || Operator.Op.GE == op ||
Operator.Op.EQ == op || Operator.Op.NE == op
);
this.op = op;
this.opnd1 = opnd1;
this.opnd2 = opnd2;
}
private LogicalExpr(LogicalExpr 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) {
Operator.Op op = this.op;
object val1 = this.opnd1.Evaluate(nodeIterator);
object val2 = this.opnd2.Evaluate(nodeIterator);
int type1 = (int)GetXPathType(val1);
int type2 = (int)GetXPathType(val2);
if (type1 < type2) {
op = Operator.InvertOperator(op);
object valTemp = val1;
val1 = val2;
val2 = valTemp;
int typeTmp = type1;
type1 = type2;
type2 = typeTmp;
}
if (op == Operator.Op.EQ || op == Operator.Op.NE) {
return CompXsltE[type1][type2](op, val1, val2);
} else {
return CompXsltO[type1][type2](op, val1, val2);
}
}
delegate bool cmpXslt(Operator.Op op, object val1, object val2);
// Number, String, Boolean, NodeSet, Navigator
private static readonly cmpXslt[][] CompXsltE = {
new cmpXslt[] { new cmpXslt(cmpNumberNumber), null , null , null , null },
new cmpXslt[] { new cmpXslt(cmpStringNumber), new cmpXslt(cmpStringStringE), null , null , null },
new cmpXslt[] { new cmpXslt(cmpBoolNumberE ), new cmpXslt(cmpBoolStringE ), new cmpXslt(cmpBoolBoolE ), null , null },
new cmpXslt[] { new cmpXslt(cmpQueryNumber ), new cmpXslt(cmpQueryStringE ), new cmpXslt(cmpQueryBoolE ), new cmpXslt(cmpQueryQueryE ), null },
new cmpXslt[] { new cmpXslt(cmpRtfNumber ), new cmpXslt(cmpRtfStringE ), new cmpXslt(cmpRtfBoolE ), new cmpXslt(cmpRtfQueryE ), new cmpXslt(cmpRtfRtfE) },
};
private static readonly cmpXslt[][] CompXsltO = {
new cmpXslt[] { new cmpXslt(cmpNumberNumber), null , null , null , null },
new cmpXslt[] { new cmpXslt(cmpStringNumber), new cmpXslt(cmpStringStringO), null , null , null },
new cmpXslt[] { new cmpXslt(cmpBoolNumberO ), new cmpXslt(cmpBoolStringO ), new cmpXslt(cmpBoolBoolO ), null , null },
new cmpXslt[] { new cmpXslt(cmpQueryNumber ), new cmpXslt(cmpQueryStringO ), new cmpXslt(cmpQueryBoolO ), new cmpXslt(cmpQueryQueryO ), null },
new cmpXslt[] { new cmpXslt(cmpRtfNumber ), new cmpXslt(cmpRtfStringO ), new cmpXslt(cmpRtfBoolO ), new cmpXslt(cmpRtfQueryO ), new cmpXslt(cmpRtfRtfO) },
};
/*cmpXslt:*/
static bool cmpQueryQueryE(Operator.Op op, object val1, object val2) {
Debug.Assert(op == Operator.Op.EQ || op == Operator.Op.NE);
bool isEQ = (op == Operator.Op.EQ);
NodeSet n1 = new NodeSet(val1);
NodeSet n2 = new NodeSet(val2);
while (true) {
if (! n1.MoveNext()) {
return false;
}
if (! n2.MoveNext()) {
return false;
}
string str1 = n1.Value;
do {
if ((str1 == n2.Value) == isEQ) {
return true;
}
}while (n2.MoveNext());
n2.Reset();
}
}
/*cmpXslt:*/
static bool cmpQueryQueryO(Operator.Op op, object val1, object val2) {
Debug.Assert(
op == Operator.Op.LT || op == Operator.Op.GT ||
op == Operator.Op.LE || op == Operator.Op.GE
);
NodeSet n1 = new NodeSet(val1);
NodeSet n2 = new NodeSet(val2);
while (true) {
if (!n1.MoveNext()) {
return false;
}
if (!n2.MoveNext()) {
return false;
}
double num1 = NumberFunctions.Number(n1.Value);
do {
if (cmpNumberNumber(op, num1, NumberFunctions.Number(n2.Value))) {
return true;
}
} while (n2.MoveNext());
n2.Reset();
}
}
static bool cmpQueryNumber(Operator.Op op, object val1, object val2) {
NodeSet n1 = new NodeSet(val1);
double n2 = (double) val2;
while (n1.MoveNext()) {
if (cmpNumberNumber(op, NumberFunctions.Number(n1.Value), n2)) {
return true;
}
}
return false;
}
static bool cmpQueryStringE(Operator.Op op, object val1, object val2) {
NodeSet n1 = new NodeSet(val1);
string n2 = (string) val2;
while (n1.MoveNext()) {
if (cmpStringStringE(op, n1.Value, n2)) {
return true;
}
}
return false;
}
static bool cmpQueryStringO(Operator.Op op, object val1, object val2) {
NodeSet n1 = new NodeSet(val1);
double n2 = NumberFunctions.Number((string) val2);
while (n1.MoveNext()) {
if (cmpNumberNumberO(op, NumberFunctions.Number(n1.Value), n2)) {
return true;
}
}
return false;
}
static bool cmpRtfQueryE(Operator.Op op, object val1, object val2) {
string n1 = Rtf(val1);
NodeSet n2 = new NodeSet(val2);
while (n2.MoveNext()) {
if (cmpStringStringE(op, n1, n2.Value)) {
return true;
}
}
return false;
}
static bool cmpRtfQueryO(Operator.Op op, object val1, object val2) {
double n1 = NumberFunctions.Number(Rtf(val1));
NodeSet n2 = new NodeSet(val2);
while (n2.MoveNext()) {
if (cmpNumberNumberO(op, n1, NumberFunctions.Number(n2.Value))) {
return true;
}
}
return false;
}
static bool cmpQueryBoolE(Operator.Op op, object val1, object val2) {
NodeSet n1 = new NodeSet(val1);
bool b1 = n1.MoveNext();
bool b2 = (bool)val2;
return cmpBoolBoolE(op, b1, b2);
}
static bool cmpQueryBoolO(Operator.Op op, object val1, object val2) {
NodeSet n1 = new NodeSet(val1);
double d1 = n1.MoveNext() ? 1.0 : 0;
double d2 = NumberFunctions.Number((bool)val2);
return cmpNumberNumberO(op, d1, d2);
}
static bool cmpBoolBoolE(Operator.Op op, bool n1, bool n2) {
Debug.Assert( op == Operator.Op.EQ || op == Operator.Op.NE,
"Unexpected Operator.op code in cmpBoolBoolE()"
);
return (op == Operator.Op.EQ) == (n1 == n2);
}
static bool cmpBoolBoolE(Operator.Op op, object val1, object val2) {
bool n1 = (bool)val1;
bool n2 = (bool)val2;
return cmpBoolBoolE(op, n1, n2);
}
static bool cmpBoolBoolO(Operator.Op op, object val1, object val2) {
double n1 = NumberFunctions.Number((bool)val1);
double n2 = NumberFunctions.Number((bool)val2);
return cmpNumberNumberO(op, n1, n2);
}
static bool cmpBoolNumberE(Operator.Op op, object val1, object val2) {
bool n1 = (bool)val1;
bool n2 = BooleanFunctions.toBoolean((double)val2);
return cmpBoolBoolE(op, n1, n2);
}
static bool cmpBoolNumberO(Operator.Op op, object val1, object val2) {
double n1 = NumberFunctions.Number((bool)val1);
double n2 = (double)val2;
return cmpNumberNumberO(op, n1, n2);
}
static bool cmpBoolStringE(Operator.Op op, object val1, object val2) {
bool n1 = (bool)val1;
bool n2 = BooleanFunctions.toBoolean((string) val2);
return cmpBoolBoolE(op, n1, n2);
}
static bool cmpRtfBoolE(Operator.Op op, object val1, object val2) {
bool n1 = BooleanFunctions.toBoolean(Rtf(val1));
bool n2 = (bool)val2;
return cmpBoolBoolE(op, n1, n2);
}
static bool cmpBoolStringO(Operator.Op op, object val1, object val2) {
return cmpNumberNumberO(op,
NumberFunctions.Number((bool)val1),
NumberFunctions.Number((string) val2)
);
}
static bool cmpRtfBoolO(Operator.Op op, object val1, object val2) {
return cmpNumberNumberO(op,
NumberFunctions.Number(Rtf(val1)),
NumberFunctions.Number((bool)val2)
);
}
static bool cmpNumberNumber(Operator.Op op, double n1, double n2) {
switch (op) {
case Operator.Op.LT : return( n1 < n2 ) ;
case Operator.Op.GT : return( n1 > n2 ) ;
case Operator.Op.LE : return( n1 <= n2 ) ;
case Operator.Op.GE : return( n1 >= n2 ) ;
case Operator.Op.EQ : return( n1 == n2 ) ;
case Operator.Op.NE : return( n1 != n2 ) ;
}
Debug.Fail("Unexpected Operator.op code in cmpNumberNumber()");
return false;
}
static bool cmpNumberNumberO(Operator.Op op, double n1, double n2) {
switch (op) {
case Operator.Op.LT : return( n1 < n2 ) ;
case Operator.Op.GT : return( n1 > n2 ) ;
case Operator.Op.LE : return( n1 <= n2 ) ;
case Operator.Op.GE : return( n1 >= n2 ) ;
}
Debug.Fail("Unexpected Operator.op code in cmpNumberNumberO()");
return false;
}
static bool cmpNumberNumber(Operator.Op op, object val1, object val2) {
double n1 = (double)val1;
double n2 = (double)val2;
return cmpNumberNumber(op, n1, n2);
}
static bool cmpStringNumber(Operator.Op op, object val1, object val2) {
double n2 = (double)val2;
double n1 = NumberFunctions.Number((string) val1);
return cmpNumberNumber(op, n1, n2);
}
static bool cmpRtfNumber(Operator.Op op, object val1, object val2) {
double n2 = (double)val2;
double n1 = NumberFunctions.Number(Rtf(val1));
return cmpNumberNumber(op, n1, n2);
}
static bool cmpStringStringE(Operator.Op op, string n1, string n2) {
Debug.Assert( op == Operator.Op.EQ || op == Operator.Op.NE,
"Unexpected Operator.op code in cmpStringStringE()"
);
return (op == Operator.Op.EQ) == (n1 == n2);
}
static bool cmpStringStringE(Operator.Op op, object val1, object val2) {
string n1 = (string) val1;
string n2 = (string) val2;
return cmpStringStringE(op, n1, n2);
}
static bool cmpRtfStringE(Operator.Op op, object val1, object val2) {
string n1 = Rtf(val1);
string n2 = (string) val2;
return cmpStringStringE(op, n1, n2);
}
static bool cmpRtfRtfE(Operator.Op op, object val1, object val2) {
string n1 = Rtf(val1);
string n2 = Rtf(val2);
return cmpStringStringE(op, n1, n2);
}
static bool cmpStringStringO(Operator.Op op, object val1, object val2) {
double n1 = NumberFunctions.Number((string) val1);
double n2 = NumberFunctions.Number((string) val2);
return cmpNumberNumberO(op, n1, n2);
}
static bool cmpRtfStringO(Operator.Op op, object val1, object val2) {
double n1 = NumberFunctions.Number(Rtf(val1));
double n2 = NumberFunctions.Number((string)val2);
return cmpNumberNumberO(op, n1, n2);
}
static bool cmpRtfRtfO(Operator.Op op, object val1, object val2) {
double n1 = NumberFunctions.Number(Rtf(val1));
double n2 = NumberFunctions.Number(Rtf(val2));
return cmpNumberNumberO(op, n1, n2);
}
public override XPathNodeIterator Clone() { return new LogicalExpr(this); }
private struct NodeSet {
private Query opnd;
private XPathNavigator current;
public NodeSet(object opnd) {
this.opnd = (Query) opnd;
current = null;
}
public bool MoveNext() {
current = opnd.Advance();
return current != null;
}
public void Reset() {
opnd.Reset();
}
public string Value { get { return this.current.Value; } }
}
private static string Rtf( object o) { return ((XPathNavigator)o).Value; }
public override XPathResultType StaticType { get { return XPathResultType.Boolean; } }
public override void PrintQuery(XmlWriter w) {
w.WriteStartElement(this.GetType().Name);
w.WriteAttributeString("op", op.ToString());
opnd1.PrintQuery(w);
opnd2.PrintQuery(w);
w.WriteEndElement();
}
}
}
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