LCOV - app.info - content/xslt/src/xslt/txPatternOptimizer.cpp

LCOV - code coverage report
| Current view: | directory - content/xslt/src/xslt - txPatternOptimizer.cpp (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 33 | 0 | 0.0 %
| Date: | 2012-07-07 | Functions: | 2 | 0 | 0.0 %

           1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
           2                 : /* ***** BEGIN LICENSE BLOCK *****
           3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           4                 :  *
           5                 :  * The contents of this file are subject to the Mozilla Public License Version
           6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           7                 :  * the License. You may obtain a copy of the License at
           8                 :  * http://www.mozilla.org/MPL/
           9                 :  *
          10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          12                 :  * for the specific language governing rights and limitations under the
          13                 :  * License.
          14                 :  *
          15                 :  * The Original Code is TransforMiiX XSLT processor.
          16                 :  *
          17                 :  * The Initial Developer of the Original Code is
          18                 :  * IBM Corporation.
          19                 :  * Portions created by the Initial Developer are Copyright (C) 2002
          20                 :  * IBM Corporation. All Rights Reserved.
          21                 :  *
          22                 :  * Contributor(s):
          23                 :  *   IBM Corporation
          24                 :  *
          25                 :  * Alternatively, the contents of this file may be used under the terms of
          26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
          27                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          29                 :  * of those above. If you wish to allow use of your version of this file only
          30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          31                 :  * use your version of this file under the terms of the MPL, indicate your
          32                 :  * decision by deleting the provisions above and replace them with the notice
          33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          34                 :  * the provisions above, a recipient may use your version of this file under
          35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          36                 :  *
          37                 :  * ***** END LICENSE BLOCK ***** */
          38                 :
          39                 : #include "txPatternOptimizer.h"
          40                 : #include "txXSLTPatterns.h"
          41                 :
          42                 : nsresult
          43               0 : txPatternOptimizer::optimize(txPattern* aInPattern, txPattern** aOutPattern)
          44                 : {
          45               0 :     *aOutPattern = nsnull;
          46               0 :     nsresult rv = NS_OK;
          47                 :
          48                 :     // First optimize sub expressions
          49               0 :     PRUint32 i = 0;
          50                 :     Expr* subExpr;
          51               0 :     while ((subExpr = aInPattern->getSubExprAt(i))) {
          52               0 :         Expr* newExpr = nsnull;
          53               0 :         rv = mXPathOptimizer.optimize(subExpr, &newExpr);
          54               0 :         NS_ENSURE_SUCCESS(rv, rv);
          55               0 :         if (newExpr) {
          56               0 :             delete subExpr;
          57               0 :             aInPattern->setSubExprAt(i, newExpr);
          58                 :         }
          59                 :
          60               0 :         ++i;
          61                 :     }
          62                 :
          63                 :     // Then optimize sub patterns
          64                 :     txPattern* subPattern;
          65               0 :     i = 0;
          66               0 :     while ((subPattern = aInPattern->getSubPatternAt(i))) {
          67               0 :         txPattern* newPattern = nsnull;
          68               0 :         rv = optimize(subPattern, &newPattern);
          69               0 :         NS_ENSURE_SUCCESS(rv, rv);
          70               0 :         if (newPattern) {
          71               0 :             delete subPattern;
          72               0 :             aInPattern->setSubPatternAt(i, newPattern);
          73                 :         }
          74                 :
          75               0 :         ++i;
          76                 :     }
          77                 :
          78                 :     // Finally see if current pattern can be optimized
          79               0 :     switch (aInPattern->getType()) {
          80                 :         case txPattern::STEP_PATTERN:
          81               0 :             return optimizeStep(aInPattern, aOutPattern);
          82                 :
          83                 :         default:
          84                 :             break;
          85                 :     }
          86                 :
          87               0 :     return NS_OK;
          88                 : }
          89                 :
          90                 :
          91                 : nsresult
          92               0 : txPatternOptimizer::optimizeStep(txPattern* aInPattern,
          93                 :                                  txPattern** aOutPattern)
          94                 : {
          95               0 :     txStepPattern* step = static_cast<txStepPattern*>(aInPattern);
          96                 :
          97                 :     // Test for predicates that can be combined into the nodetest
          98                 :     Expr* pred;
          99               0 :     while ((pred = step->getSubExprAt(0)) &&
         100               0 :            !pred->canReturnType(Expr::NUMBER_RESULT) &&
         101               0 :            !pred->isSensitiveTo(Expr::NODESET_CONTEXT)) {
         102                 :         txNodeTest* predTest = new txPredicatedNodeTest(step->getNodeTest(),
         103               0 :                                                         pred);
         104               0 :         step->dropFirst();
         105               0 :         step->setNodeTest(predTest);
         106                 :     }
         107                 :
         108               0 :     return NS_OK;
         109                 : }

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