// Copyright 2026 Google LLC

//

// 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 <cstdint>

#include <cstddef>

#include <new>

#include "dcmtk/dcmdata/dcmetinf.h"

#include "dcmtk/dcmdata/dcistrmb.h"

#include "dcmtk/dcmdata/dcdeftag.h"

#include "dcmtk/dcmdata/dcxfer.h"

static constexpr std::size_t kNewCap = 2 * 1024 * 1024;

void* operator new(std::size_t n, const std::nothrow_t&) noexcept {

  if (n > kNewCap) return nullptr;

  try { return ::operator new(n); } catch (...) { return nullptr; }

}

void* operator new[](std::size_t n, const std::nothrow_t&) noexcept {

  if (n > kNewCap) return nullptr;

  try { return ::operator new[](n); } catch (...) { return nullptr; }

}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {

  DcmInputBufferStream in;

  in.setBuffer((void*)data, size);

  in.setEos();

  DcmMetaInfo mi;

  const Uint32 kMaxReadLen = 128 * 1024;

  if (mi.read(in, EXS_LittleEndianExplicit, EGL_noChange, kMaxReadLen).good()) {

    OFString s;

    (void)mi.findAndGetOFString(DCM_TransferSyntaxUID, s);

    (void)mi.findAndGetOFString(DCM_SourceApplicationEntityTitle, s);

  }

  return 0;

}