Method cb_read

rust/src/file_accessor.rs:41–59

(
            ctxt: *mut c_void,
            dest: *mut c_void,
            offset: u64,
            len: usize,
        )

        }

        extern "C" fn cb_read<F>(
            ctxt: *mut c_void,
            dest: *mut c_void,
            offset: u64,
            len: usize,
        ) -> usize
        where
            F: Read + Write + Seek + Sized,
        {
            let f = unsafe { &mut *(ctxt as *mut F) };
            let dest = unsafe { slice::from_raw_parts_mut(dest as *mut u8, len) };

            if f.seek(SeekFrom::Start(offset)).is_err() {
                log::debug!("Failed to seek to offset {:x}", offset);
                0
            } else {
                f.read(dest).unwrap_or(0)
            }
        }

        extern "C" fn cb_write<F>(
            ctxt: *mut c_void,