mirror of
https://github.com/RetroShare/RetroShare.git
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c7ed9c6df7
- reserved service id - reworked error codes - added xpath manipulation and basic gui elements in preview dialog git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs-b1@5514 b45a01b8-16f6-495d-af2f-9b41ad6348cc
103 lines
2.2 KiB
C++
103 lines
2.2 KiB
C++
/****************************************************************
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* RetroShare GUI is distributed under the following license:
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*
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* Copyright (C) 2012 by Thunder
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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****************************************************************/
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#include "XPathWrapper.h"
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#include "XMLWrapper.h"
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XPathWrapper::XPathWrapper(XMLWrapper &xmlWrapper) : mXMLWrapper(xmlWrapper)
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{
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mContext = NULL;
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mResult = NULL;
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}
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XPathWrapper::~XPathWrapper()
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{
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cleanup();
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}
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void XPathWrapper::cleanup()
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{
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if (mResult) {
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xmlXPathFreeObject(mResult);
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mResult = NULL;
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}
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if (mContext) {
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xmlXPathFreeContext(mContext);
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mContext = NULL;
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}
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}
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bool XPathWrapper::compile(const char *expression)
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{
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cleanup();
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xmlDocPtr document = mXMLWrapper.getDocument();
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if (!document) {
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return false;
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}
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mContext = xmlXPathNewContext(document);
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if (!mContext) {
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cleanup();
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return false;
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}
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xmlChar *xmlExpression = NULL;
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if (!mXMLWrapper.convertFromString(expression, xmlExpression)) {
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cleanup();
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return false;
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}
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mResult = xmlXPathEvalExpression(xmlExpression, mContext);
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xmlFree(xmlExpression);
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return true;
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}
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unsigned int XPathWrapper::count()
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{
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if (!mResult) {
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return 0;
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}
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if (xmlXPathNodeSetIsEmpty(mResult->nodesetval)) {
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return 0;
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}
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return mResult->nodesetval->nodeNr;
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}
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xmlNodePtr XPathWrapper::node(unsigned int index)
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{
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if (!mResult) {
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return NULL;
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}
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if (xmlXPathNodeSetIsEmpty(mResult->nodesetval)) {
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return NULL;
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}
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if (index >= (unsigned int) mResult->nodesetval->nodeNr) {
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return NULL;
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}
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return mResult->nodesetval->nodeTab[index];
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}
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