// Copyright 2017 Google Inc. All rights reserved.

//

// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include "libxml/parser.h"

#include "libxml/xmlsave.h"

#include "examples/xml/xml.pb.h"

#include "examples/xml/xml_writer.h"

#include "src/libfuzzer/libfuzzer_macro.h"

namespace {

void ignore(void* ctx, const char* msg, ...) {}

template <class T, class D>

std::unique_ptr<T, D> MakeUnique(T* obj, D del) {

  return {obj, del};

}

libxml2_example.cc:std::__1::unique_ptr<_xmlDoc, void (*)(_xmlDoc*)> (anonymous namespace)::MakeUnique<_xmlDoc, void (*)(_xmlDoc*)>(_xmlDoc*, void (*)(_xmlDoc*))

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std::unique_ptr<T, D> MakeUnique(T* obj, D del) {

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  return {obj, del};

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}

libxml2_example.cc:std::__1::unique_ptr<_xmlBuffer, void (*)(_xmlBuffer*)> (anonymous namespace)::MakeUnique<_xmlBuffer, void (*)(_xmlBuffer*)>(_xmlBuffer*, void (*)(_xmlBuffer*))

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std::unique_ptr<T, D> MakeUnique(T* obj, D del) {

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  return {obj, del};

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}

libxml2_example.cc:std::__1::unique_ptr<_xmlSaveCtxt, int (*)(_xmlSaveCtxt*)> (anonymous namespace)::MakeUnique<_xmlSaveCtxt, int (*)(_xmlSaveCtxt*)>(_xmlSaveCtxt*, int (*)(_xmlSaveCtxt*))

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std::unique_ptr<T, D> MakeUnique(T* obj, D del) {

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  return {obj, del};

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}

}  // namespace

DEFINE_PROTO_FUZZER(const protobuf_mutator::xml::Input& message) {

  std::string xml = MessageToXml(message.document());

  int options = message.options();

  // Network requests are too slow.

  options |= XML_PARSE_NONET;

  // These flags can cause network or file access and hangs.

  options &= ~(XML_PARSE_NOENT | XML_PARSE_HUGE | XML_PARSE_DTDVALID |

               XML_PARSE_DTDLOAD | XML_PARSE_DTDATTR);

  xmlSetGenericErrorFunc(nullptr, &ignore);

  if (auto doc =

          MakeUnique(xmlReadMemory(xml.c_str(), static_cast<int>(xml.size()),

                                   "", nullptr, options),

                     &xmlFreeDoc)) {

    auto buf = MakeUnique(xmlBufferCreate(), &xmlBufferFree);

    auto ctxt =

        MakeUnique(xmlSaveToBuffer(buf.get(), nullptr, 0), &xmlSaveClose);

    xmlSaveDoc(ctxt.get(), doc.get());

  }

}