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author | B. Stack <bgstack15@gmail.com> | 2022-05-22 17:03:17 -0400 |
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committer | B. Stack <bgstack15@gmail.com> | 2022-05-22 17:03:17 -0400 |
commit | 2c81be72eef5363736cf1892646c74a3311ee4c1 (patch) | |
tree | 3894ba7e10c78750c195381a861da5e8166a6bfd /zen/crc.h | |
parent | Merge branch 'b11.20' into 'master' (diff) | |
download | FreeFileSync-2c81be72eef5363736cf1892646c74a3311ee4c1.tar.gz FreeFileSync-2c81be72eef5363736cf1892646c74a3311ee4c1.tar.bz2 FreeFileSync-2c81be72eef5363736cf1892646c74a3311ee4c1.zip |
add upstream 11.21b11.21
Diffstat (limited to 'zen/crc.h')
-rw-r--r-- | zen/crc.h | 7 |
1 files changed, 5 insertions, 2 deletions
@@ -52,7 +52,9 @@ uint16_t getCrc16(ByteIterator first, ByteIterator last) //http://www.sunshine2k 0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40, 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41, 0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641, 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040 }; - static_assert(arraySize(crcTable) == 256 && arrayAccumulate<uint32_t>(crcTable) == 8380544); + static_assert(std::size(crcTable) == 256); + static_assert(arrayHash(crcTable) == 728085957); + crc = (crc >> 8) ^ crcTable[(crc ^ b) & 0xFF]; }); return crc; @@ -96,7 +98,8 @@ uint32_t getCrc32(ByteIterator first, ByteIterator last) //https://en.wikipedia. 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d }; - static_assert(arraySize(crcTable) == 256 && arrayAccumulate<uint64_t>(crcTable) == 549755813760); + static_assert(std::size(crcTable) == 256); + static_assert(arrayHash(crcTable) == 2988069445); crc = (crc >> 8) ^ crcTable[(crc ^ b) & 0xFF]; }); |