/* XzCrc64.c -- CRC64 calculation
 2010-04-16 : Igor Pavlov : Public domain */
 
 #include "XzCrc64.h"
 
 #define kCrc64Poly UINT64_CONST(0xC96C5795D7870F42)
 UInt64 g_Crc64Table[256];
 
 void MY_FAST_CALL Crc64GenerateTable(void)
 {
   UInt32 i;
   for (i = 0; i < 256; i++)
   {
     UInt64 r = i;
     int j;
     for (j = 0; j < 8; j++)
       r = (r >> 1) ^ ((UInt64)kCrc64Poly & ~((r & 1) - 1));
     g_Crc64Table[i] = r;
   }
 }
 
 UInt64 MY_FAST_CALL Crc64Update(UInt64 v, const void *data, size_t size)
 {
   const Byte *p = (const Byte *)data;
   for (; size > 0 ; size--, p++)
     v = CRC64_UPDATE_BYTE(v, *p);
   return v;
 }
 
 UInt64 MY_FAST_CALL Crc64Calc(const void *data, size_t size)
 {
   return CRC64_GET_DIGEST(Crc64Update(CRC64_INIT_VAL, data, size));
 }