}

  /**
   * Fully maps a file read-only in to memory as per {@link
   * FileChannel#map(java.nio.channels.FileChannel.MapMode, long, long)}.
   *
   * <p>Files are mapped from offset 0 to its length.
   *
   * <p>This only works for files ≤ {@link Integer#MAX_VALUE} bytes.
   *
   * @param file the file to map
   * @return a read-only buffer reflecting {@code file}

        GeoInfo geoInfo = null;
        FacetInfo facetInfo = null;
        HighlightInfo highlightInfo = null;
        String sort = "";
        int startPosition = 0;
        int pageSize = 10;
        int offset = 0;
        String[] extraQueries = new String[0];
        Map<String, Object> attributes = new HashMap<>();
        Locale locale = Locale.ENGLISH;
        SearchRequestType type = SearchRequestType.SEARCH;

                throw new CIFSException("token is null but len > 0");
            }
            if (off < 0 || len < 0 || off > token.length || off + len > token.length) {
                throw new CIFSException("invalid offset/length");
            }
            return Arrays.copyOfRange(token, off, off + len);
        }

        @Override
        public String getNetbiosName() {
            return this.nbName;
        }

	)

	// user specified offset or limit
	var totalSize int
	if c, ok := tx.Statement.Clauses["LIMIT"]; ok {
		if limit, ok := c.Expression.(clause.Limit); ok {
			if limit.Limit != nil {
				totalSize = *limit.Limit
			}

			if totalSize > 0 && batchSize > totalSize {
				batchSize = totalSize
			}

			// reset to offset to 0 in next batch
			tx = tx.Offset(-1).Session(&Session{})
		}
	}

`UploadFile` には次の `async` メソッドがあります。いずれも内部で対応するファイルメソッド（内部の `SpooledTemporaryFile`）を呼び出します。

- `write(data)`: `data`（`str` または `bytes`）を書き込みます。
- `read(size)`: `size`（`int`）バイト/文字を読み込みます。
- `seek(offset)`: ファイル内のバイト位置 `offset`（`int`）に移動します。
    - 例: `await myfile.seek(0)` はファイルの先頭に移動します。
    - 一度 `await myfile.read()` を実行して、もう一度内容を読みたい場合に特に便利です。
- `close()`: ファイルを閉じます。

これらはすべて `async` メソッドなので、`await` する必要があります。

        byte[] filenameBytes = filename.getBytes(StandardCharsets.UTF_8);
        writeInt4(filenameBytes.length, buffer, bufferIndex + 60); // fileNameLength

        // Copy filename into buffer at offset 94
        System.arraycopy(filenameBytes, 0, buffer, 94, filenameBytes.length);

        response.dataCount = 120;
        int bytesRead = response.readDataWireFormat(buffer, 0, buffer.length);

          return RegularContiguousSet.this;
        }

        @Override
        public C get(int i) {
          checkElementIndex(i, size());
          return domain.offset(first(), i);
        }

        // redeclare to help optimizers with b/310253115
        @SuppressWarnings("RedundantOverride")
        @Override
        @J2ktIncompatible
        @GwtIncompatible

   * {@link #isWellFormed(byte[])}. Note that this can be false even when {@code
   * isWellFormed(bytes)} is true.
   *
   * @param bytes the input buffer
   * @param off the offset in the buffer of the first byte to read
   * @param len the number of bytes to read from the buffer
   */
  public static boolean isWellFormed(byte[] bytes, int off, int len) {
    int end = off + len;

   * {@link #isWellFormed(byte[])}. Note that this can be false even when {@code
   * isWellFormed(bytes)} is true.
   *
   * @param bytes the input buffer
   * @param off the offset in the buffer of the first byte to read
   * @param len the number of bytes to read from the buffer
   */
  public static boolean isWellFormed(byte[] bytes, int off, int len) {
    int end = off + len;

	if opts.startOffset < 0 {
		return nil, InvalidRange{}
	}
	resp, err := az.clnt.DownloadStream(ctx, az.Bucket, az.getDest(object), &azblob.DownloadStreamOptions{
		Range: blob.HTTPRange{Offset: opts.startOffset, Count: opts.length},
	})
	if err != nil {
		return nil, azureToObjectError(err, az.Bucket, az.getDest(object))
	}

	return resp.Body, nil
}