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Minor tweak for CRC32 method

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This commit is contained in:
Travis Nickles 2018-03-05 02:25:39 -06:00
parent 284acc128a
commit a8b6213c0c
1 changed files with 31 additions and 31 deletions
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62
DS4Windows/DS4Library/Crc32.cs
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@ -327,39 +327,39 @@ namespace DS4Windows
bufsize -= 16; bufsize -= 16;
} }
while (bufsize >= 8) //while (bufsize >= 8)
//if (bufsize >= 8) //if (bufsize >= 8)
{
uint one = (buffer[i++] |
(uint)(buffer[i++] << 8) |
(uint)(buffer[i++] << 16) |
(uint)(buffer[i++] << 24)) ^ crc;
uint two = buffer[i++] |
(uint)(buffer[i++] << 8) |
(uint)(buffer[i++] << 16) |
(uint)(buffer[i++] << 24);
crc = secondLook[7, one & 0xFF] ^
secondLook[6, (one >> 8) & 0xFF] ^
secondLook[5, (one >> 16) & 0xFF] ^
secondLook[4, one >> 24] ^
secondLook[3, two & 0xFF] ^
secondLook[2, (two >> 8) & 0xFF] ^
secondLook[1, (two >> 16) & 0xFF] ^
defaultTable[two >> 24];
bufsize -= 8; uint one8 = (buffer[i++] |
/*crc ^= buffer[i++] | (uint)(buffer[i++] << 8) |
(uint)(buffer[i++] << 8) | (uint)(buffer[i++] << 16) |
(uint)(buffer[i++] << 16) | (uint)(buffer[i++] << 24)) ^ crc;
(uint)(buffer[i++] << 24);// i = i + 4; uint two8 = buffer[i++] |
//crc ^= buffer[i]; (uint)(buffer[i++] << 8) |
crc = secondLook[3, (crc & 0xFF)] ^ (uint)(buffer[i++] << 16) |
secondLook[2, ((crc >> 8) & 0xFF)] ^ (uint)(buffer[i++] << 24);
secondLook[1, ((crc >> 16) & 0xFF)] ^ crc = secondLook[7, one8 & 0xFF] ^
defaultTable[crc >> 24]; secondLook[6, (one8 >> 8) & 0xFF] ^
bufsize -= 4; secondLook[5, (one8 >> 16) & 0xFF] ^
*/ secondLook[4, one8 >> 24] ^
} secondLook[3, two8 & 0xFF] ^
secondLook[2, (two8 >> 8) & 0xFF] ^
secondLook[1, (two8 >> 16) & 0xFF] ^
defaultTable[two8 >> 24];
bufsize -= 8;
/*crc ^= buffer[i++] |
(uint)(buffer[i++] << 8) |
(uint)(buffer[i++] << 16) |
(uint)(buffer[i++] << 24);// i = i + 4;
//crc ^= buffer[i];
crc = secondLook[3, (crc & 0xFF)] ^
secondLook[2, ((crc >> 8) & 0xFF)] ^
secondLook[1, ((crc >> 16) & 0xFF)] ^
defaultTable[crc >> 24];
bufsize -= 4;
*/
while (--bufsize >= 0) while (--bufsize >= 0)
{ {