//
//
// Copyright 2019 gRPC authors.
//
// 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 <stdint.h>
#include <string.h>

#include <grpc/compression.h>
#include <grpc/grpc.h>
#include <grpc/slice.h>
#include <grpc/slice_buffer.h>

#include "src/core/lib/compression/message_compress.h"

bool squelch = true;

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
  if (size < 1) return 0;

  // Instead of rolling something complicated to convert a uint8_t to the enum,
  // just bail out if it isn't trivially convertible.
  if (data[0] >= GRPC_COMPRESS_ALGORITHMS_COUNT) return 0;
  const auto compression_algorithm =
      static_cast<grpc_compression_algorithm>(data[0]);

  grpc_init();
  grpc_slice_buffer input_buffer;
  grpc_slice_buffer_init(&input_buffer);
  grpc_slice_buffer_add(&input_buffer,
                        grpc_slice_from_copied_buffer(
                            reinterpret_cast<const char*>(data + 1), size - 1));
  grpc_slice_buffer output_buffer;
  grpc_slice_buffer_init(&output_buffer);

  grpc_msg_decompress(compression_algorithm, &input_buffer, &output_buffer);

  grpc_slice_buffer_destroy(&input_buffer);
  grpc_slice_buffer_destroy(&output_buffer);
  grpc_shutdown();
  return 0;
}
