Fields
- bit_index: s64
- capacity: s64
- length: s64
- total_size: s64
- discard_read_bytes: := false
- has_ended: := false
- free_when_done: := false
- close_when_done: := false
- file_initted: := false
- fh: File
- load_callback: Buffer_Load_Callback
- load_callback_user_data: *void
- bytes: *u8
- mode: Buffer_Mode