static bool ParseBuffer(Buffer *buffer, std::string *err, const json &o,
                        bool store_original_json_for_extras_and_extensions,
                        FsCallbacks *fs, const std::string &basedir,
                        bool is_binary = false,
                        const unsigned char *bin_data = nullptr,
                        size_t bin_size = 0) {
  size_t byteLength;
  if (!ParseUnsignedProperty(&byteLength, err, o, "byteLength", true,
                             "Buffer")) {
    return false;
  }

  // In glTF 2.0, uri is not mandatory anymore
  buffer->uri.clear();
  ParseStringProperty(&buffer->uri, err, o, "uri", false, "Buffer");

  // having an empty uri for a non embedded image should not be valid
  if (!is_binary && buffer->uri.empty()) {
    if (err) {
      (*err) += "'uri' is missing from non binary glTF file buffer.\n";
    }
  }

  json_const_iterator type;
  if (FindMember(o, "type", type)) {
    std::string typeStr;
    if (GetString(GetValue(type), typeStr)) {
      if (typeStr.compare("arraybuffer") == 0) {
        // buffer.type = "arraybuffer";
      }
    }
  }

  if (is_binary) {
    // Still binary glTF accepts external dataURI.
    if (!buffer->uri.empty()) {
      // First try embedded data URI.
      if (IsDataURI(buffer->uri)) {
        std::string mime_type;
        if (!DecodeDataURI(&buffer->data, mime_type, buffer->uri, byteLength,
                           true)) {
          if (err) {
            (*err) +=
                "Failed to decode 'uri' : " + buffer->uri + " in Buffer\n";
          }
          return false;
        }
      } else {
        // External .bin file.
        std::string decoded_uri = dlib::urldecode(buffer->uri);
        if (!LoadExternalFile(&buffer->data, err, /* warn */ nullptr,
                              decoded_uri, basedir, /* required */ true,
                              byteLength, /* checkSize */ true, fs)) {
          return false;
        }
      }
    } else {
      // load data from (embedded) binary data

      if ((bin_size == 0) || (bin_data == nullptr)) {
        if (err) {
          (*err) += "Invalid binary data in `Buffer'.\n";
        }
        return false;
      }

      if (byteLength > bin_size) {
        if (err) {
          std::stringstream ss;
          ss << "Invalid `byteLength'. Must be equal or less than binary size: "
                "`byteLength' = "
             << byteLength << ", binary size = " << bin_size << std::endl;
          (*err) += ss.str();
        }
        return false;
      }

      // Read buffer data
      buffer->data.resize(static_cast<size_t>(byteLength));
      memcpy(&(buffer->data.at(0)), bin_data, static_cast<size_t>(byteLength));
    }

  } else {
    if (IsDataURI(buffer->uri)) {
      std::string mime_type;
      if (!DecodeDataURI(&buffer->data, mime_type, buffer->uri, byteLength,
                         true)) {
        if (err) {
          (*err) += "Failed to decode 'uri' : " + buffer->uri + " in Buffer\n";
        }
        return false;
      }
    } else {
      // Assume external .bin file.
      std::string decoded_uri = dlib::urldecode(buffer->uri);
      if (!LoadExternalFile(&buffer->data, err, /* warn */ nullptr, decoded_uri,
                            basedir, /* required */ true, byteLength,
                            /* checkSize */ true, fs)) {
        return false;
      }
    }
  }

  ParseStringProperty(&buffer->name, err, o, "name", false);

  ParseExtensionsProperty(&buffer->extensions, err, o);
  ParseExtrasProperty(&buffer->extras, o);

  if (store_original_json_for_extras_and_extensions) {
    {
      json_const_iterator it;
      if (FindMember(o, "extensions", it)) {
        buffer->extensions_json_string = JsonToString(GetValue(it));
      }
    }
    {
      json_const_iterator it;
      if (FindMember(o, "extras", it)) {
        buffer->extras_json_string = JsonToString(GetValue(it));
      }
    }
  }

  return true;
}
static bool ParseBuffer(Buffer *buffer, std::string *err, const json &o,
                        bool store_original_json_for_extras_and_extensions,
                        FsCallbacks *fs, const std::string &basedir,
                        bool is_binary = false,
                        const unsigned char *bin_data = nullptr,
                        size_t bin_size = 0) {
  size_t byteLength;
  if (!ParseUnsignedProperty(&byteLength, err, o, "byteLength", true,
                             "Buffer")) {
    return false;
  }

   
  buffer->uri.clear();
  ParseStringProperty(&buffer->uri, err, o, "uri", false, "Buffer");

   
  if (!is_binary && buffer->uri.empty()) {
    if (err) {
      (*err) += "'uri' is missing from non binary glTF file buffer.\n";
    }
  }

  json_const_iterator type;
  if (FindMember(o, "type", type)) {
    std::string typeStr;
    if (GetString(GetValue(type), typeStr)) {
      if (typeStr.compare("arraybuffer") == 0) {
         
      }
    }
  }

  if (is_binary) {
     
    if (!buffer->uri.empty()) {
       
      if (IsDataURI(buffer->uri)) {
        std::string mime_type;
        if (!DecodeDataURI(&buffer->data, mime_type, buffer->uri, byteLength,
                           true)) {
          if (err) {
            (*err) +=
                "Failed to decode 'uri' : " + buffer->uri + " in Buffer\n";
          }
          return false;
        }
      } else {
         
        std::string decoded_uri = dlib::urldecode(buffer->uri);
        if (!LoadExternalFile(&buffer->data, err,   nullptr,
                              decoded_uri, basedir,   true,
                              byteLength,   true, fs)) {
          return false;
        }
      }
    } else {
       

      if ((bin_size == 0) || (bin_data == nullptr)) {
        if (err) {
          (*err) += "Invalid binary data in `Buffer'.\n";
        }
        return false;
      }

      if (byteLength > bin_size) {
        if (err) {
          std::stringstream ss;
          ss << "Invalid `byteLength'. Must be equal or less than binary size: "
                "`byteLength' = "
             << byteLength << ", binary size = " << bin_size << std::endl;
          (*err) += ss.str();
        }
        return false;
      }

       
      buffer->data.resize(static_cast<size_t>(byteLength));
      memcpy(&(buffer->data.at(0)), bin_data, static_cast<size_t>(byteLength));
    }

  } else {
    if (IsDataURI(buffer->uri)) {
      std::string mime_type;
      if (!DecodeDataURI(&buffer->data, mime_type, buffer->uri, byteLength,
                         true)) {
        if (err) {
          (*err) += "Failed to decode 'uri' : " + buffer->uri + " in Buffer\n";
        }
        return false;
      }
    } else {
       
      std::string decoded_uri = dlib::urldecode(buffer->uri);
      if (!LoadExternalFile(&buffer->data, err,   nullptr, decoded_uri,
                            basedir,   true, byteLength,
                              true, fs)) {
        return false;
      }
    }
  }

  ParseStringProperty(&buffer->name, err, o, "name", false);

  ParseExtensionsProperty(&buffer->extensions, err, o);
  ParseExtrasProperty(&buffer->extras, o);

  if (store_original_json_for_extras_and_extensions) {
    {
      json_const_iterator it;
      if (FindMember(o, "extensions", it)) {
        buffer->extensions_json_string = JsonToString(GetValue(it));
      }
    }
    {
      json_const_iterator it;
      if (FindMember(o, "extras", it)) {
        buffer->extras_json_string = JsonToString(GetValue(it));
      }
    }
  }

  return true;
}