system/gd/fuzz/helpers.cc

/*
 * Copyright 2020 The Android Open Source Project
 *
 * 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 "fuzz/helpers.h"

#include "common/bind.h"

namespace bluetooth {
namespace fuzz {

// cribbed from https://github.com/google/fuzzing/blob/master/docs/split-inputs.md#magic-separator
std::vector<std::vector<uint8_t>> SplitInput(
    const uint8_t* data, size_t size, const uint8_t* separator, size_t separatorSize) {
  std::vector<std::vector<uint8_t>> result;
  assert(separatorSize > 0);
  auto beg = data;
  auto end = data + size;
  while (const uint8_t* pos = (const uint8_t*)memmem(beg, end - beg, separator, separatorSize)) {
    result.push_back({beg, pos});
    beg = pos + separatorSize;
  }
  if (beg < end) {
    result.push_back({beg, end});
  }
  return result;
}

std::vector<uint8_t> GetArbitraryBytes(FuzzedDataProvider* fdp) {
  return fdp->ConsumeBytes<uint8_t>(fdp->ConsumeIntegral<size_t>());
}

}  // namespace fuzz
}  // namespace bluetooth