// Copyright 2022 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
//
//     https://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 <woff2/decode.h>
#include <woff2/encode.h>
#include <woff2/output.h>

#include <cinttypes>
#include <cstddef>
#include <memory>

extern "C" bool WOFF2_ConvertWOFF2ToTTF(const uint8_t* data, size_t length,
                                        uint8_t** result, size_t* result_length,
                                        size_t max_size) {
  if (result) {
    *result = nullptr;
  }
  if (result_length) {
    *result_length = 0;
  }
  if (!data || !length || !result || !result_length) {
    return false;
  }
  size_t final_size = ::woff2::ComputeWOFF2FinalSize(data, length);
  if (final_size > (max_size ? max_size : woff2::kDefaultMaxSize)) {
    return false;
  }
  auto buffer = std::make_unique<uint8_t[]>(final_size);
  woff2::WOFF2MemoryOut output(buffer.get(), final_size);
  if (!::woff2::ConvertWOFF2ToTTF(data, length, &output)) {
    return false;
  }
  *result = buffer.release();
  *result_length = final_size;
  return true;
}

extern "C" bool WOFF2_ConvertTTFToWOFF2(const uint8_t* data, size_t length,
                                        uint8_t** result,
                                        size_t* result_length) {
  if (result) {
    *result = nullptr;
  }
  if (result_length) {
    *result_length = 0;
  }
  if (!data || !length || !result || !result_length) {
    return false;
  }
  size_t size = woff2::MaxWOFF2CompressedSize(data, length);
  auto buffer = std::make_unique<uint8_t[]>(size);
  if (!buffer) {
    return false;
  }
  if (!woff2::ConvertTTFToWOFF2(data, length, buffer.get(), &size)) {
    return false;
  }
  *result = buffer.release();
  *result_length = size;
  return true;
}

extern "C" void WOFF2_Free(uint8_t* data) noexcept {
  std::unique_ptr<uint8_t[]> p{data};
}