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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2012 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "Xml2XmlParser.h"
#include <cassert>
#include <cstring>
#include "a2io.h"
#include "ParserStateMachine.h"
#include "A2STR.h"
#include "a2functional.h"
#include "XmlAttr.h"
namespace aria2 {
namespace xml {
namespace {
void mlStartElement(void* userData, const xmlChar* localname,
const xmlChar* prefix, const xmlChar* nsUri,
int numNamespaces, const xmlChar** namespaces, int numAttrs,
int numDefaulted, const xmlChar** attrs)
{
SessionData* sd = reinterpret_cast<SessionData*>(userData);
std::vector<XmlAttr> xmlAttrs;
const char** pattrs = reinterpret_cast<const char**>(attrs);
for (size_t i = 0, max = numAttrs * 5; i < max; i += 5) {
XmlAttr xmlAttr;
assert(pattrs[i]);
xmlAttr.localname = pattrs[i];
if (pattrs[i + 1]) {
xmlAttr.prefix = pattrs[i + 1];
}
if (attrs[i + 2]) {
xmlAttr.nsUri = pattrs[i + 2];
}
xmlAttr.value = pattrs[i + 3];
xmlAttr.valueLength = pattrs[i + 4] - xmlAttr.value;
xmlAttrs.push_back(xmlAttr);
}
sd->psm->beginElement(reinterpret_cast<const char*>(localname),
reinterpret_cast<const char*>(prefix),
reinterpret_cast<const char*>(nsUri), xmlAttrs);
if (sd->psm->needsCharactersBuffering()) {
sd->charactersStack.push_front(A2STR::NIL);
}
}
} // namespace
namespace {
void mlEndElement(void* userData, const xmlChar* localname,
const xmlChar* prefix, const xmlChar* nsUri)
{
SessionData* sd = reinterpret_cast<SessionData*>(userData);
std::string characters;
if (sd->psm->needsCharactersBuffering()) {
characters = std::move(sd->charactersStack.front());
sd->charactersStack.pop_front();
}
sd->psm->endElement(reinterpret_cast<const char*>(localname),
reinterpret_cast<const char*>(prefix),
reinterpret_cast<const char*>(nsUri), characters);
}
} // namespace
namespace {
void mlCharacters(void* userData, const xmlChar* ch, int len)
{
SessionData* sd = reinterpret_cast<SessionData*>(userData);
if (sd->psm->needsCharactersBuffering()) {
sd->charactersStack.front().append(&ch[0], &ch[len]);
}
}
} // namespace
namespace {
xmlSAXHandler mySAXHandler = {
nullptr, // internalSubsetSAXFunc
nullptr, // isStandaloneSAXFunc
nullptr, // hasInternalSubsetSAXFunc
nullptr, // hasExternalSubsetSAXFunc
nullptr, // resolveEntitySAXFunc
nullptr, // getEntitySAXFunc
nullptr, // entityDeclSAXFunc
nullptr, // notationDeclSAXFunc
nullptr, // attributeDeclSAXFunc
nullptr, // elementDeclSAXFunc
nullptr, // unparsedEntityDeclSAXFunc
nullptr, // setDocumentLocatorSAXFunc
nullptr, // startDocumentSAXFunc
nullptr, // endDocumentSAXFunc
nullptr, // startElementSAXFunc
nullptr, // endElementSAXFunc
nullptr, // referenceSAXFunc
&mlCharacters, // charactersSAXFunc
nullptr, // ignorableWhitespaceSAXFunc
nullptr, // processingInstructionSAXFunc
nullptr, // commentSAXFunc
nullptr, // warningSAXFunc
nullptr, // errorSAXFunc
nullptr, // fatalErrorSAXFunc
nullptr, // getParameterEntitySAXFunc
nullptr, // cdataBlockSAXFunc
nullptr, // externalSubsetSAXFunc
XML_SAX2_MAGIC, // unsigned int initialized
nullptr, // void * _private
&mlStartElement, // startElementNsSAX2Func
&mlEndElement, // endElementNsSAX2Func
nullptr, // xmlStructuredErrorFunc
};
} // namespace
XmlParser::XmlParser(ParserStateMachine* psm)
: psm_(psm),
sessionData_(psm),
ctx_(xmlCreatePushParserCtxt(&mySAXHandler, &sessionData_, nullptr, 0,
nullptr)),
lastError_(0)
{
}
XmlParser::~XmlParser() { xmlFreeParserCtxt(ctx_); }
ssize_t XmlParser::parseUpdate(const char* data, size_t size)
{
if (lastError_ != 0) {
return lastError_;
}
int rv = xmlParseChunk(ctx_, data, size, 0);
if (rv != 0) {
return lastError_ = ERR_XML_PARSE;
}
else {
return size;
}
}
ssize_t XmlParser::parseFinal(const char* data, size_t size)
{
if (lastError_ != 0) {
return lastError_;
}
int rv = xmlParseChunk(ctx_, data, size, 1);
if (rv != 0) {
return lastError_ = ERR_XML_PARSE;
}
else {
return size;
}
}
int XmlParser::reset()
{
psm_->reset();
sessionData_.reset();
int rv = xmlCtxtResetPush(ctx_, nullptr, 0, nullptr, nullptr);
if (rv != 0) {
return lastError_ = ERR_RESET;
}
else {
return 0;
}
}
} // namespace xml
} // namespace aria2
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