diff options
Diffstat (limited to 'src/lib/lib7z/7zCrcOpt.c')
-rw-r--r-- | src/lib/lib7z/7zCrcOpt.c | 70 |
1 files changed, 35 insertions, 35 deletions
diff --git a/src/lib/lib7z/7zCrcOpt.c b/src/lib/lib7z/7zCrcOpt.c index a8d42a80074..db72778281b 100644 --- a/src/lib/lib7z/7zCrcOpt.c +++ b/src/lib/lib7z/7zCrcOpt.c @@ -9,26 +9,26 @@ UInt32 MY_FAST_CALL CrcUpdateT4(UInt32 v, const void *data, size_t size, const UInt32 *table) { - const Byte *p = (const Byte *)data; - for (; size > 0 && ((unsigned)(ptrdiff_t)p & 3) != 0; size--, p++) - v = CRC_UPDATE_BYTE_2(v, *p); - for (; size >= 4; size -= 4, p += 4) - { - v ^= *(const UInt32 *)p; - v = - table[0x300 + (v & 0xFF)] ^ - table[0x200 + ((v >> 8) & 0xFF)] ^ - table[0x100 + ((v >> 16) & 0xFF)] ^ - table[0x000 + ((v >> 24))]; - } - for (; size > 0; size--, p++) - v = CRC_UPDATE_BYTE_2(v, *p); - return v; + const Byte *p = (const Byte *)data; + for (; size > 0 && ((unsigned)(ptrdiff_t)p & 3) != 0; size--, p++) + v = CRC_UPDATE_BYTE_2(v, *p); + for (; size >= 4; size -= 4, p += 4) + { + v ^= *(const UInt32 *)p; + v = + table[0x300 + (v & 0xFF)] ^ + table[0x200 + ((v >> 8) & 0xFF)] ^ + table[0x100 + ((v >> 16) & 0xFF)] ^ + table[0x000 + ((v >> 24))]; + } + for (; size > 0; size--, p++) + v = CRC_UPDATE_BYTE_2(v, *p); + return v; } UInt32 MY_FAST_CALL CrcUpdateT8(UInt32 v, const void *data, size_t size, const UInt32 *table) { - return CrcUpdateT4(v, data, size, table); + return CrcUpdateT4(v, data, size, table); } #endif @@ -40,25 +40,25 @@ UInt32 MY_FAST_CALL CrcUpdateT8(UInt32 v, const void *data, size_t size, const U UInt32 MY_FAST_CALL CrcUpdateT1_BeT4(UInt32 v, const void *data, size_t size, const UInt32 *table) { - const Byte *p = (const Byte *)data; - for (; size > 0 && ((unsigned)(ptrdiff_t)p & 3) != 0; size--, p++) - v = CRC_UPDATE_BYTE_2(v, *p); - v = CRC_UINT32_SWAP(v); - table += 0x100; - for (; size >= 4; size -= 4, p += 4) - { - v ^= *(const UInt32 *)p; - v = - table[0x000 + (v & 0xFF)] ^ - table[0x100 + ((v >> 8) & 0xFF)] ^ - table[0x200 + ((v >> 16) & 0xFF)] ^ - table[0x300 + ((v >> 24))]; - } - table -= 0x100; - v = CRC_UINT32_SWAP(v); - for (; size > 0; size--, p++) - v = CRC_UPDATE_BYTE_2(v, *p); - return v; + const Byte *p = (const Byte *)data; + for (; size > 0 && ((unsigned)(ptrdiff_t)p & 3) != 0; size--, p++) + v = CRC_UPDATE_BYTE_2(v, *p); + v = CRC_UINT32_SWAP(v); + table += 0x100; + for (; size >= 4; size -= 4, p += 4) + { + v ^= *(const UInt32 *)p; + v = + table[0x000 + (v & 0xFF)] ^ + table[0x100 + ((v >> 8) & 0xFF)] ^ + table[0x200 + ((v >> 16) & 0xFF)] ^ + table[0x300 + ((v >> 24))]; + } + table -= 0x100; + v = CRC_UINT32_SWAP(v); + for (; size > 0; size--, p++) + v = CRC_UPDATE_BYTE_2(v, *p); + return v; } #endif |