## f_size

The f_size function gets the size of a file.

    FSIZE_t f_size (
      FIL* fp   /* [IN] File object */
    );

#### Parameters

fp
  Pointer to the open file object structure.

#### Return Values

Returns the size of the file in unit of byte.

#### Description

In this revision, the `f_size` function is implemented as a macro. It does not have any validation and mutual exclusion.

    #define f_size(fp) ((fp)->obj.objsize)

#### QuickInfo

Always available.

#### See Also

`f_open, f_lseek, FIL`

Return