| Revision: | 1.1 |
| Committed: | Thu Feb 15 18:09:34 2007 UTC (17 years, 3 months ago) by root |
| Content type: | text/plain |
| Branch: | MAIN |
| CVS Tags: | rel-2_0, rel-2_1 |
| Log Message: | - the damn rotate shift checksum just failed on me - add crc32 and use it for bmaps_checksum (probably also for images). |
| # | Content |
|---|---|
| 1 | #ifndef CRC_H__ |
| 2 | #define CRC_H__ |
| 3 | |
| 4 | #include "traits.h" |
| 5 | |
| 6 | struct crc32 |
| 7 | { |
| 8 | uint32_t crc; |
| 9 | |
| 10 | crc32 () |
| 11 | { |
| 12 | crc = ~uint32_t (0); |
| 13 | } |
| 14 | |
| 15 | void |
| 16 | operator ()(const uint8_t byte) |
| 17 | { |
| 18 | extern const uint32_t crc_32_tab[256]; |
| 19 | crc = crc_32_tab[uint8_t (crc) ^ byte] ^ (crc >> 8); |
| 20 | } |
| 21 | |
| 22 | operator uint32_t () { return crc; } |
| 23 | }; |
| 24 | |
| 25 | #endif |