Function storage_file_read 

pub unsafe extern "C" fn storage_file_read(
    file: *mut File,
    buff: *mut c_void,
    bytes_to_read: usize,
) -> usize

Read bytes from a file into a buffer.

Arguments

• file - pointer to the file instance to read from.
• buff - pointer to the buffer to be filled with read data.
• bytes_to_read - number of bytes to read. Must be less than or equal to the size of the buffer.

Returns

actual number of bytes read (may be fewer than requested).