Method NewFromFile

src/MarisaDict.cpp:145–173

}

MarisaDictPtr MarisaDict::NewFromFile(FILE* fp) {
  // Verify file header
  size_t headerLen = strlen(OCD2_HEADER);
  void* buffer = malloc(sizeof(char) * headerLen);
  size_t bytesRead = fread(buffer, sizeof(char), headerLen, fp);
  if (bytesRead != headerLen || memcmp(buffer, OCD2_HEADER, headerLen) != 0) {
    throw InvalidFormat("Invalid OpenCC dictionary header");
  }
  free(buffer);
  long trieOffset = ftell(fp);
  fseek(fp, 0L, SEEK_END);
  long fileEnd = ftell(fp);
  fseek(fp, trieOffset, SEEK_SET);
  size_t remainingSize =
      (fileEnd > trieOffset) ? static_cast<size_t>(fileEnd - trieOffset) : 0;

  MarisaDictPtr dict(new MarisaDict());
  if (remainingSize > 0) {
    dict->internal->mappedBuffer.resize(remainingSize);
    bytesRead = fread(&dict->internal->mappedBuffer[0],
                      sizeof(char), remainingSize, fp);
    if (bytesRead != remainingSize) {
      throw InvalidFormat("Invalid OpenCC Marisa dictionary.");
    }
  }

  dict->LoadFromMappedBuffer();
  return dict;
}

MarisaDictPtr MarisaDict::NewFromBuffer(const char* data, size_t size) {
  // Verify file header