Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / XPath / Internal / LogicalExpr.cs / 1 / LogicalExpr.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- 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); } Operator.Op[] invertOp = { /*LT*/ Operator.Op.GT, /*GT*/ Operator.Op.LT, /*LE*/ Operator.Op.GE, /*GE*/ Operator.Op.LE, /*EQ*/ Operator.Op.EQ, /*NE*/ Operator.Op.NE, }; 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 = invertOp[(int)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(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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