/*

    RawSpeed - RAW file decoder.

    Copyright (C) 2017 Roman Lebedev

    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 2 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, write to the Free Software

    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

*/

#include "decompressors/CrwDecompressor.h"

#include "MemorySanitizer.h"

#include "adt/Array1DRef.h"

#include "adt/Casts.h"

#include "adt/Optional.h"

#include "common/RawImage.h"

#include "common/RawspeedException.h"

#include "fuzz/Common.h"

#include "io/Buffer.h"

#include "io/ByteStream.h"

#include "io/Endianness.h"

#include <cassert>

#include <cstdint>

#include <cstdio>

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, size_t Size);

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, size_t Size) {

  assert(Data);

  try {

    const rawspeed::Buffer b(

        Data, rawspeed::implicit_cast<rawspeed::Buffer::size_type>(Size));

    const rawspeed::DataBuffer db(b, rawspeed::Endianness::little);

    rawspeed::ByteStream bs(db);

    rawspeed::RawImage mRaw(CreateRawImage(bs));

    const uint32_t dec_table = bs.getU32();

    const uint32_t lowbits = bs.getU32();

    rawspeed::Optional<rawspeed::Array1DRef<const uint8_t>> lowbitInput;

    if (lowbits != 0) {

      lowbitInput = bs.getBuffer(lowbits);

    }

    rawspeed::Array1DRef<const uint8_t> input =

        bs.peekRemainingBuffer().getAsArray1DRef();

    rawspeed::CrwDecompressor c(mRaw, dec_table, input, lowbitInput);

    mRaw->createData();

    c.decompress();

    rawspeed::MSan::CheckMemIsInitialized(

        mRaw->getByteDataAsUncroppedArray2DRef());

  } catch (const rawspeed::RawspeedException&) { // NOLINT(bugprone-empty-catch)

    // Exceptions are good, crashes are bad.

  }

  return 0;

}