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/*
* libopenraw - xmlhandler.cpp
*
* Copyright (C) 2008-2015 Hubert Figuiere
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <string.h>
#include <utility>
#include <libxml/xmlreader.h>
#include "xmlhandler.h"
namespace xml {
bool LtString::operator()(const xmlChar *s1, const xmlChar *s2) const {
return strcmp((const char *)s1, (const char *)s2) < 0;
}
Context::Context(const HandlerPtr &handler) : m_handler(handler) {
}
Context::~Context() {
}
ContextPtr Context::startElement(const int32_t /*element*/) {
return shared_from_this();
}
void Context::endElement(const int32_t /*element*/) {
}
void Context::appendText(const xmlChar * /*content*/) {
}
Handler::Handler(const std::string &filename)
: Context(HandlerPtr())
, m_reader(xmlNewTextReaderFilename(filename.c_str())) {
}
Handler::~Handler() {
if (m_reader != NULL) {
xmlFreeTextReader(m_reader);
}
}
void Handler::mapTags(const tag_map_definition_t *map) {
m_tag_map.clear();
const tag_map_definition_t *ptag = map;
while (ptag->first != 0) {
m_tag_map.insert(
std::make_pair((const xmlChar *)ptag->first, ptag->second));
ptag++;
}
}
int32_t Handler::getTagId(const xmlChar *tag) {
if (tag == NULL) {
return 0;
}
tag_map_t::const_iterator iter = m_tag_map.find(tag);
if (iter == m_tag_map.end()) {
fprintf(stderr, "Tag %s is unknown\n", tag);
return 0;
}
return iter->second;
}
bool Handler::process() {
if (m_reader == NULL) {
return false;
}
m_contexts.push(shared_from_this());
int ret = xmlTextReaderRead(m_reader);
while (ret == 1) {
int node_type = xmlTextReaderNodeType(m_reader);
switch (node_type) {
case XML_READER_TYPE_ELEMENT: {
int32_t element = getTagId(xmlTextReaderConstName(m_reader));
ContextPtr context = m_contexts.top()->startElement(element);
m_contexts.push(context);
break;
}
case XML_READER_TYPE_TEXT: {
const xmlChar *content = xmlTextReaderConstValue(m_reader);
m_contexts.top()->appendText(content);
break;
}
case XML_READER_TYPE_END_ELEMENT: {
int32_t element = getTagId(xmlTextReaderConstName(m_reader));
m_contexts.top()->endElement(element);
m_contexts.pop();
break;
}
default:
break;
}
ret = xmlTextReaderRead(m_reader);
}
// make sure we clear the contexts.
while (!m_contexts.empty()) {
m_contexts.pop();
}
return true;
}
SimpleElementContext::SimpleElementContext(const HandlerPtr &handler,
std::string &content)
: Context(handler), m_content(content) {
}
void SimpleElementContext::appendText(const xmlChar *content) {
m_content += (const char *)content;
}
}
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