paul@6 | 1 | #include "accessor.h" |
paul@6 | 2 | |
paul@56 | 3 | #include <string.h> |
paul@56 | 4 | |
paul@56 | 5 | |
paul@56 | 6 | |
paul@6 | 7 | Accessor::Accessor(fileid_t fileid, offset_t size) |
paul@6 | 8 | : _size(size), fileid(fileid) |
paul@6 | 9 | { |
paul@6 | 10 | } |
paul@6 | 11 | |
paul@6 | 12 | /* Return the size of the file. */ |
paul@6 | 13 | |
paul@6 | 14 | offset_t Accessor::get_size() |
paul@6 | 15 | { |
paul@6 | 16 | return _size; |
paul@6 | 17 | } |
paul@6 | 18 | |
paul@53 | 19 | /* Update the size of the file. */ |
paul@53 | 20 | |
paul@53 | 21 | void Accessor::set_size(offset_t size) |
paul@53 | 22 | { |
paul@53 | 23 | _size = size; |
paul@53 | 24 | } |
paul@53 | 25 | |
paul@6 | 26 | /* Perform any closing operation on the file. */ |
paul@6 | 27 | |
paul@6 | 28 | void Accessor::close() |
paul@6 | 29 | { |
paul@6 | 30 | } |
paul@6 | 31 | |
paul@6 | 32 | /* Perform any opening operation on the file. */ |
paul@6 | 33 | |
paul@6 | 34 | void Accessor::open() |
paul@6 | 35 | { |
paul@6 | 36 | } |
paul@6 | 37 | |
paul@56 | 38 | /* Data transfer methods. */ |
paul@56 | 39 | |
paul@56 | 40 | void Accessor::fill(Flexpage *flexpage) |
paul@56 | 41 | { |
paul@56 | 42 | /* Filling completely beyond the end of file should produce an empty |
paul@56 | 43 | flexpage. This could potentially be a shared read-only flexpage that |
paul@56 | 44 | would be replaced by an independent writable flexpage if ever written. */ |
paul@56 | 45 | |
paul@56 | 46 | if (flexpage->base_offset < _size) |
paul@56 | 47 | fill_populated(flexpage); |
paul@56 | 48 | else |
paul@56 | 49 | memset((void *) flexpage->base_addr, 0, flexpage->size); |
paul@56 | 50 | } |
paul@56 | 51 | |
paul@56 | 52 | void Accessor::flush(Flexpage *flexpage) |
paul@56 | 53 | { |
paul@56 | 54 | /* Flushing completely beyond the end of file should discard the |
paul@56 | 55 | flexpage. */ |
paul@56 | 56 | |
paul@56 | 57 | if (flexpage->base_offset < _size) |
paul@56 | 58 | flush_populated(flexpage); |
paul@56 | 59 | } |
paul@56 | 60 | |
paul@56 | 61 | /* Data transfer helper methods. */ |
paul@56 | 62 | |
paul@56 | 63 | void Accessor::fill_populated(Flexpage *flexpage) |
paul@56 | 64 | { |
paul@57 | 65 | (void) flexpage; |
paul@56 | 66 | } |
paul@56 | 67 | |
paul@56 | 68 | void Accessor::flush_populated(Flexpage *flexpage) |
paul@56 | 69 | { |
paul@57 | 70 | (void) flexpage; |
paul@56 | 71 | } |
paul@56 | 72 | |
paul@6 | 73 | // vim: tabstop=4 expandtab shiftwidth=4 |