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Adding copies of trunk version of NodeSet.* (to ease merging of TX_WALKER_BRANCH). r=sicking.
This commit is contained in:
peter%propagandism.org
parent
97d5a7af50
commit
7faf1e5709
486
content/xslt/src/xpath/txNodeSet.cpp
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486
content/xslt/src/xpath/txNodeSet.cpp
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@ -0,0 +1,486 @@
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is TransforMiiX XSLT processor.
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*
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* The Initial Developer of the Original Code is The MITRE Corporation.
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* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
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*
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* Portions created by Keith Visco as a Non MITRE employee,
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* (C) 1999 Keith Visco. All Rights Reserved.
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*
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* Contributor(s):
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* Keith Visco, kvisco@ziplink.net
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* -- original author.
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*
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* Larry Fitzpatrick, OpenText, lef@opentext.com
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* -- moved initialization of DEFAULT_SIZE from NodeSet.h to here
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*
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* Olivier Gerardin, ogerardin@vo.lu
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* -- fixed numberValue()
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*
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*/
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#include "NodeSet.h"
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#include "dom.h"
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#include "XMLDOMUtils.h"
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#include <string.h>
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static const int kTxNodeSetMinSize = 4;
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static const int kTxNodeSetGrowFactor = 2;
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/*
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* Implementation of an XPath NodeSet
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*/
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/*
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* Creates a new empty NodeSet
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*/
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NodeSet::NodeSet(txResultRecycler* aRecycler)
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: txAExprResult(aRecycler),
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mElements(0),
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mBufferSize(0),
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mElementCount(0)
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{
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}
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/*
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* Creates a new NodeSet containing the supplied Node
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*/
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NodeSet::NodeSet(Node* aNode, txResultRecycler* aRecycler)
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: txAExprResult(aRecycler),
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mElements(new Node*[1]),
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mBufferSize(1),
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mElementCount(1)
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{
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NS_ASSERTION(aNode, "missing node to NodeSet::NodeSet");
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if (!mElements) {
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NS_ASSERTION(0, "out of memory");
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mBufferSize = 0;
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mElementCount = 0;
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}
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else {
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mElements[0] = aNode;
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}
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}
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/*
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* Creates a new NodeSet, copying the Node references from the source
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* NodeSet
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*/
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NodeSet::NodeSet(const NodeSet& aSource, txResultRecycler* aRecycler)
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: txAExprResult(aRecycler),
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mElements(0),
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mBufferSize(0),
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mElementCount(0)
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{
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append(&aSource);
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}
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/*
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* Adds the specified Node to this NodeSet if it is not already in this
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* NodeSet. The node is inserted according to document order.
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* @param aNode the Node to add to the NodeSet
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* @return errorcode.
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*/
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nsresult NodeSet::add(Node* aNode)
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{
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NS_ASSERTION(aNode, "missing node to NodeSet::add");
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if (!aNode)
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return NS_ERROR_NULL_POINTER;
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MBool nonDup;
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int pos = findPosition(aNode, 0, mElementCount - 1, nonDup);
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if (nonDup) {
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if (!ensureSize(mElementCount + 1))
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return NS_ERROR_OUT_OF_MEMORY;
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memmove(mElements + pos + 1,
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mElements + pos,
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(mElementCount - pos) * sizeof(Node*));
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mElements[pos] = aNode;
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++mElementCount;
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}
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return NS_OK;
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}
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/*
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* Adds the nodes in specified NodeSet to this NodeSet. The resulting NodeSet
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* is sorted in document order and does not contain any duplicate nodes.
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* @param aNodes the NodeSet to add, must be in document order.
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* @return true on success. false on failure.
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*/
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/*
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* The code is optimized to make a minimum number of calls to
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* Node::compareDocumentPosition. The idea is this:
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* We have the two nodesets (number indicate "document position")
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*
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* 1 3 7 <- source 1
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* 2 3 6 8 9 <- source 2
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* _ _ _ _ _ _ _ _ <- result
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*
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*
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* We select the last node in the smallest nodeset and find where in the other
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* nodeset it would be inserted. In this case we would take the 7 from the
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* first nodeset and find the position between the 6 and 8 in the second.
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* We then take the nodes after the insert-position and move it to the end of
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* the resulting nodeset, and then do the same for the node from the smaller
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* nodeset. Which in this case means that we'd first move the 8 and 9 nodes,
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* and then the 7 node, giving us the following:
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*
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* 1 3 <- source 1
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* 2 3 6 <- source 2
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* _ _ _ _ _ 7 8 9 <- result
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*
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* Repeat until one of the nodesets are empty. If we find a duplicate node
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* when searching for where insertposition we skip the step where we move the
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* node from the smaller nodeset to the resulting nodeset. So in this next
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* step in the example we would only move the 3 and 6 nodes from the second
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* nodeset and then just remove the 3 node from the first nodeset. Giving:
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*
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* 1 <- source 1
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* 2 <- source 2
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* _ _ _ 3 6 7 8 9 <- result
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*
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* We might therefor end up with some blanks in the bigining of the resulting
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* nodeset, which we simply fix by moving all the nodes one step down.
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*/
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nsresult NodeSet::add(const NodeSet* aNodes)
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{
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NS_ASSERTION(aNodes, "missing nodeset to NodeSet::add");
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if (!aNodes)
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return NS_ERROR_NULL_POINTER;
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if (aNodes->mElementCount == 0)
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return NS_OK;
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// This is probably a rather common case, so lets try to shortcut
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if (mElementCount == 0 ||
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mElements[mElementCount-1]->compareDocumentPosition(aNodes->mElements[0]) < 0)
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return append(aNodes);
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if (!ensureSize(mElementCount + aNodes->mElementCount))
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return NS_ERROR_OUT_OF_MEMORY;
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// Index of last node in this nodeset
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int thisPos = mElementCount - 1;
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// Index of last node in other nodeset
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int otherPos = aNodes->mElementCount - 1;
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// Index in result where last insert was done.
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int lastInsertPos = mElementCount + aNodes->mElementCount;
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while (thisPos >= 0 && otherPos >= 0) {
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if (thisPos > otherPos) {
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int pos;
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MBool nonDup;
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// Find where in the remaining nodes in this nodeset a node from
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// the other nodeset should be inserted
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pos = findPosition(aNodes->mElements[otherPos], 0, thisPos,
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nonDup);
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// Move nodes in this nodeset
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lastInsertPos -= thisPos - pos + 1;
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memmove(mElements + lastInsertPos,
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mElements + pos,
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(thisPos - pos + 1) * sizeof(Node*));
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// Copy node from the other nodeset unless it's a dup
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if (nonDup)
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mElements[--lastInsertPos] = aNodes->mElements[otherPos];
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// Adjust positions in both nodesets
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thisPos = pos - 1;
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--otherPos;
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}
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else {
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int pos;
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MBool nonDup;
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// Find where in the remaining nodes in the other nodeset a node
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// from this nodeset should be inserted
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pos = aNodes->findPosition(mElements[thisPos], 0, otherPos,
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nonDup);
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// Copy nodes from other nodeset to this
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lastInsertPos -= otherPos - pos + 1;
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memcpy(mElements + lastInsertPos,
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aNodes->mElements + pos,
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(otherPos - pos + 1) * sizeof(Node*));
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// Move node in this nodeset unless it's a dup
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if (nonDup)
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mElements[--lastInsertPos] = mElements[thisPos];
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// Adjust positions in both nodesets
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otherPos = pos - 1;
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--thisPos;
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}
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}
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if (thisPos >= 0) {
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// There were some elements still left in this nodeset that need to
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// be moved
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lastInsertPos -= thisPos + 1;
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memmove(mElements + lastInsertPos,
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mElements,
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(thisPos + 1) * sizeof(Node*));
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}
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else if (otherPos >= 0) {
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// There were some elements still left in the other nodeset that need
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// to be copied
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lastInsertPos -= otherPos + 1;
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memcpy(mElements + lastInsertPos,
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aNodes->mElements,
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(otherPos + 1) * sizeof(Node*));
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}
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// if lastInsertPos != 0 then we have found some duplicates causing the
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// first element to not be placed at mElements[0]
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mElementCount += aNodes->mElementCount - lastInsertPos;
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if (lastInsertPos) {
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memmove(mElements,
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mElements + lastInsertPos,
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mElementCount * sizeof(Node*));
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}
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return NS_OK;
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}
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/*
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* Append API
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* These functions should be used with care.
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* They are intended to be used when the caller assures that the resulting
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* NodeSet remains in document order.
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* Abuse will break document order, and cause errors in the result.
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* These functions are significantly faster than the add API, as no
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* Node::OrderInfo structs will be generated.
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*/
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/*
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* Appends the specified Node to the end of this NodeSet
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* @param aNode the Node to append to the NodeSet
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* @return true on success. false on failure.
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*/
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nsresult NodeSet::append(Node* aNode)
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{
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NS_ASSERTION(aNode, "missing node to NodeSet::append");
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if (!aNode)
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return NS_ERROR_NULL_POINTER;
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if (!ensureSize(mElementCount + 1))
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return NS_ERROR_OUT_OF_MEMORY;
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mElements[mElementCount++] = aNode;
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return NS_OK;
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}
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/*
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* Appends the nodes in the specified NodeSet to the end of this NodeSet
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* @param aNodes the NodeSet to append to the NodeSet
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* @return true on success. false on failure.
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*/
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nsresult NodeSet::append(const NodeSet* aNodes)
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{
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NS_ASSERTION(aNodes, "missing nodeset to NodeSet::append");
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if (!aNodes)
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return NS_ERROR_NULL_POINTER;
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if (!ensureSize(mElementCount + aNodes->mElementCount))
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return NS_ERROR_OUT_OF_MEMORY;
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memcpy(mElements + mElementCount,
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aNodes->mElements,
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aNodes->mElementCount * sizeof(Node*));
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mElementCount += aNodes->mElementCount;
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return NS_OK;
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}
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/*
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* Reverse the order of the nodes.
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*/
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void NodeSet::reverse()
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{
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int i;
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for (i = 0; i < mElementCount / 2; ++i) {
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Node* tmp;
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tmp = mElements[i];
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mElements[i] = mElements[mElementCount - 1 - i];
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mElements[mElementCount - 1 - i] = tmp;
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}
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}
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/*
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* Returns the index of the specified Node,
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* or -1 if the Node is not contained in the NodeSet
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* @param aNode the Node to get the index for
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* @return index of specified node or -1 if the node does not exist
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*/
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int NodeSet::indexOf(Node* aNode) const
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{
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// XXX this doesn't fully work since attribute-nodes are broken
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// and can't be pointer-compared. However it's the best we can
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// do for now.
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int i;
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for (i = 0; i < mElementCount; ++i) {
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if (mElements[i] == aNode)
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return i;
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}
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return -1;
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}
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/*
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* Returns the Node at the specified position in this NodeSet.
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* @param aIndex the position of the Node to return
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* @return Node at specified position
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*/
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Node* NodeSet::get(int aIndex) const
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{
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NS_ASSERTION(aIndex >= 0 && aIndex < mElementCount,
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"invalid index in NodeSet::get");
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if (aIndex < 0 || aIndex >= mElementCount)
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return 0;
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return mElements[aIndex];
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}
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/*
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* Returns the type of ExprResult represented
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* @return the type of ExprResult represented
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*/
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short NodeSet::getResultType()
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{
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return txAExprResult::NODESET;
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}
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/*
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* Converts this ExprResult to a Boolean (MBool) value
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* @return the Boolean value
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*/
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MBool NodeSet::booleanValue()
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{
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return mElementCount > 0;
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}
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/*
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* Converts this ExprResult to a Number (double) value
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* @return the Number value
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*/
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double NodeSet::numberValue()
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{
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nsAutoString str;
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stringValue(str);
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return Double::toDouble(str);
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}
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/*
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* Creates a String representation of this ExprResult
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* @param aStr the destination string to append the String representation to.
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*/
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void NodeSet::stringValue(nsAString& aStr)
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{
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if (mElementCount > 0)
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XMLDOMUtils::getNodeValue(get(0), aStr);
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}
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nsAString*
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NodeSet::stringValuePointer()
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{
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return nsnull;
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}
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/*
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* Makes sure that the mElements buffer contains at least aSize elements.
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* If a new allocation is required the elements are copied over to the new
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* buffer
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* @param aSize requested number of elements
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* @return true if allocation succeded, false on out of memory
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*/
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MBool NodeSet::ensureSize(int aSize)
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{
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if (aSize <= mBufferSize)
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return MB_TRUE;
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// This isn't 100% safe. But until someone manages to make a 1gig nodeset
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// it should be ok.
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int newSize = mBufferSize > kTxNodeSetMinSize ? mBufferSize :
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kTxNodeSetMinSize;
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while (newSize < aSize)
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newSize *= kTxNodeSetGrowFactor;
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Node** newArr = new Node*[newSize];
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if (!newArr)
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return MB_FALSE;
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if (mElementCount)
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memcpy(newArr, mElements, mElementCount * sizeof(Node*));
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delete [] mElements;
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mElements = newArr;
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||||
mBufferSize = newSize;
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||||
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return MB_TRUE;
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||||
}
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||||
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||||
/*
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* Finds position in the mElements buffer where a node should be inserted
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||||
* to keep the nodeset in document order. Searches the positions
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||||
* aFirst-aLast, including both aFirst and aLast.
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* @param aNode Node to find insert position for
|
||||
* @param aFirst First index to search, this index will be searched
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* @param aLast Last index to search, this index will be searched
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||||
* @param aNonDup Out-param. Set to true if the node should be inserted,
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||||
* false if it already exists in the NodeSet.
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||||
* @return The index where to insert the node. The node should be
|
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* inserted before the node at this index. This value is
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* always >= aFirst and <= aLast + 1. This value is always
|
||||
* set, even if aNode already exists in the NodeSet
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||||
*/
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||||
int NodeSet::findPosition(Node* aNode, int aFirst,
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int aLast, MBool& aNonDup) const
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{
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NS_ASSERTION(aNode, "missing node in NodeSet::findPosition");
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NS_ASSERTION(aFirst <= aLast+1 && aLast < mElementCount,
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||||
"bad position in NodeSet::findPosition");
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||||
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||||
if (aLast - aFirst <= 1) {
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||||
// If we search 2 nodes or less there is no point in further divides
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||||
int pos;
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||||
for (pos = aFirst; pos <= aLast; ++pos) {
|
||||
int cmp = aNode->compareDocumentPosition(mElements[pos]);
|
||||
if (cmp < 0) {
|
||||
aNonDup = MB_TRUE;
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||||
return pos;
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||||
}
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||||
|
||||
if (cmp == 0) {
|
||||
aNonDup = MB_FALSE;
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||||
return pos;
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||||
}
|
||||
}
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||||
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||||
aNonDup = MB_TRUE;
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||||
return pos;
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||||
}
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||||
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||||
int midpos = (aFirst + aLast) / 2;
|
||||
int cmp = aNode->compareDocumentPosition(mElements[midpos]);
|
||||
if (cmp == 0) {
|
||||
aNonDup = MB_FALSE;
|
||||
return midpos;
|
||||
}
|
||||
|
||||
if (cmp > 0)
|
||||
return findPosition(aNode, midpos + 1, aLast, aNonDup);
|
||||
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||||
return findPosition(aNode, aFirst, midpos - 1, aNonDup);
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||||
}
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||||
209
content/xslt/src/xpath/txNodeSet.h
Normal file
209
content/xslt/src/xpath/txNodeSet.h
Normal file
@ -0,0 +1,209 @@
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
||||
*
|
||||
* The contents of this file are subject to the Mozilla Public
|
||||
* License Version 1.1 (the "License"); you may not use this file
|
||||
* except in compliance with the License. You may obtain a copy of
|
||||
* the License at http://www.mozilla.org/MPL/
|
||||
*
|
||||
* Software distributed under the License is distributed on an "AS
|
||||
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
||||
* implied. See the License for the specific language governing
|
||||
* rights and limitations under the License.
|
||||
*
|
||||
* The Original Code is TransforMiiX XSLT processor.
|
||||
*
|
||||
* The Initial Developer of the Original Code is The MITRE Corporation.
|
||||
* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
|
||||
*
|
||||
* Portions created by Keith Visco as a Non MITRE employee,
|
||||
* (C) 1999 Keith Visco. All Rights Reserved.
|
||||
*
|
||||
* Contributor(s):
|
||||
* Keith Visco, kvisco@ziplink.net
|
||||
* -- original author.
|
||||
*
|
||||
* Larry Fitzpatrick, OpenText, lef@opentext.com
|
||||
* -- moved initialization of DEFAULT_SIZE to NodeSet.cpp
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* Implementation of an XPath NodeSet
|
||||
*/
|
||||
|
||||
#ifndef TRANSFRMX_NODESET_H
|
||||
#define TRANSFRMX_NODESET_H
|
||||
|
||||
#include "ExprResult.h"
|
||||
#include "txError.h"
|
||||
|
||||
class Node;
|
||||
|
||||
class NodeSet : public txAExprResult
|
||||
{
|
||||
|
||||
public:
|
||||
|
||||
NodeSet(); // Not to be implemented
|
||||
|
||||
/*
|
||||
* Creates a new empty NodeSet
|
||||
*/
|
||||
NodeSet(txResultRecycler* aRecycler);
|
||||
|
||||
/*
|
||||
* Creates a new NodeSet containing the supplied node
|
||||
*/
|
||||
NodeSet(Node* aNode, txResultRecycler* aRecycler);
|
||||
|
||||
/*
|
||||
* Creates a new NodeSet, copying the Node references from the source
|
||||
* NodeSet
|
||||
*/
|
||||
NodeSet(const NodeSet& aSource, txResultRecycler* aRecycler);
|
||||
|
||||
/*
|
||||
* Destructor for NodeSet, will not delete referenced Nodes
|
||||
*/
|
||||
virtual ~NodeSet()
|
||||
{
|
||||
delete [] mElements;
|
||||
}
|
||||
|
||||
/*
|
||||
* Adds the specified Node to this NodeSet if it is not already in this
|
||||
* NodeSet. The node is inserted according to document order.
|
||||
* @param aNode the Node to add to the NodeSet
|
||||
* @return errorcode.
|
||||
*/
|
||||
nsresult add(Node* aNode);
|
||||
|
||||
/*
|
||||
* Adds the nodes in specified NodeSet to this NodeSet. The resulting
|
||||
* NodeSet is sorted in document order and does not contain any duplicate
|
||||
* nodes.
|
||||
* @param aNodes the NodeSet to add, must be in document order.
|
||||
* @return errorcode.
|
||||
*/
|
||||
nsresult add(const NodeSet* aNodes);
|
||||
|
||||
/*
|
||||
* Append API
|
||||
* These functions should be used with care.
|
||||
* They are intended to be used when the caller assures that the resulting
|
||||
* NodeSet remains in document order.
|
||||
* Abuse will break document order, and cause errors in the result.
|
||||
* These functions are significantly faster than the add API, as no
|
||||
* Node::OrderInfo structs will be generated.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Appends the specified Node to the end of this NodeSet
|
||||
* @param aNode the Node to append to the NodeSet
|
||||
* @return errorcode.
|
||||
*/
|
||||
nsresult append(Node* aNode);
|
||||
|
||||
/*
|
||||
* Appends the nodes in the specified NodeSet to the end of this NodeSet
|
||||
* @param aNodes the NodeSet to append to the NodeSet
|
||||
* @return errorcode.
|
||||
*/
|
||||
nsresult append(const NodeSet* aNodes);
|
||||
|
||||
/*
|
||||
* Reverse the order of the nodes.
|
||||
*/
|
||||
void reverse();
|
||||
|
||||
/*
|
||||
* Removes all nodes from this nodeset
|
||||
*/
|
||||
void clear()
|
||||
{
|
||||
mElementCount = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns the index of the specified Node,
|
||||
* or -1 if the Node is not contained in the NodeSet
|
||||
* @param aNode the Node to get the index for
|
||||
* @return index of specified node or -1 if the node does not exist
|
||||
*/
|
||||
int indexOf(Node* aNode) const;
|
||||
|
||||
/*
|
||||
* Returns true if the specified Node is contained in the set.
|
||||
* @param aNode the Node to search for
|
||||
* @return true if specified Node is contained in the NodeSet
|
||||
*/
|
||||
MBool contains(Node* aNode) const
|
||||
{
|
||||
return indexOf(aNode) >= 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns the Node at the specified position in this NodeSet.
|
||||
* @param aIndex the position of the Node to return
|
||||
* @return Node at specified position
|
||||
*/
|
||||
Node* get(int aIndex) const;
|
||||
|
||||
/*
|
||||
* Returns true if there are no Nodes in the NodeSet.
|
||||
* @return true if there are no Nodes in the NodeSet.
|
||||
*/
|
||||
MBool isEmpty() const
|
||||
{
|
||||
return mElementCount == 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns the number of elements in the NodeSet
|
||||
* @return the number of elements in the NodeSet
|
||||
*/
|
||||
int size() const
|
||||
{
|
||||
return mElementCount;
|
||||
}
|
||||
|
||||
/*
|
||||
* Virtual methods from ExprResult
|
||||
*/
|
||||
TX_DECL_EXPRRESULT
|
||||
|
||||
private:
|
||||
|
||||
/*
|
||||
* Makes sure that the mElements buffer contains at least aSize elements.
|
||||
* If a new allocation is required the elements are copied over to the new
|
||||
* buffer
|
||||
* @param aSize requested number of elements
|
||||
* @return true if allocation succeded, false on out of memory
|
||||
*/
|
||||
MBool ensureSize(int aSize);
|
||||
|
||||
/*
|
||||
* Finds position in the mElements buffer where a node should be inserted
|
||||
* to keep the nodeset in document order. Searches the positions
|
||||
* aFirst-aLast, including both aFirst and aLast.
|
||||
* @param aNode Node to find insert position for
|
||||
* @param aFirst First index to search, this index will be searched
|
||||
* @param aLast Last index to search, this index will be searched
|
||||
* @param aPos out-param. Will be set to the index where to insert the
|
||||
* node. The node should be inserted before the node at
|
||||
* this index. This value is always >= aFirst and
|
||||
* <= aLast + 1. This value is always set, even if aNode
|
||||
* already exists in the NodeSet.
|
||||
* @return true if the node should be inserted, false if it already exists
|
||||
* in the NodeSet
|
||||
*/
|
||||
MBool findPosition(Node* aNode, int aFirst, int aLast, int& aPos) const;
|
||||
|
||||
Node** mElements;
|
||||
int mBufferSize;
|
||||
int mElementCount;
|
||||
|
||||
};
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user