| 1 | #ifndef DISCARD_BLOCK_H |
| 2 | #define DISCARD_BLOCK_H |
| 3 | |
| 4 | #include <string> |
| 5 | #include <vector> |
| 6 | |
| 7 | #include "tape_block.hh" |
| 8 | |
| 9 | using namespace std; |
| 10 | |
| 11 | /*! |
| 12 | *\brief Class representating an invalid block. |
| 13 | * |
| 14 | *Reasons for a block to be invalid are:\n |
| 15 | * - EOF on fd used to initialise, |
| 16 | * - Checksum error in a block |
| 17 | * - IO error while reading from fd |
| 18 | * The reason for the block to be a discard_block can be |
| 19 | * resolved by using get_state(). |
| 20 | */ |
| 21 | class discard_block |
| 22 | :public tape_block |
| 23 | { |
| 24 | friend tape_block* tape_block::gen_from_fd(int,void(*)(void*), |
| 25 | void(*)(void*),void*); |
| 26 | public: // methods |
| 27 | discard_block(discard_block &); |
| 28 | virtual vector<string> get_description(); |
| 29 | |
| 30 | discard_block(tape_block &); |
| 31 | private: // methods |
| 32 | |
| 33 | discard_block(); |
| 34 | |
| 35 | }; // class discard_block |
| 36 | |
| 37 | |
| 38 | #endif |