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/* Copyright (c) 2000-2003, 2007 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
#include <my_global.h>
#include <my_sys.h>
#include <zlib.h>
/*
Calculate a long checksum for a memoryblock.
SYNOPSIS
my_checksum()
crc start value for crc
pos pointer to memory block
length length of the block
*/
ha_checksum my_checksum(ha_checksum crc, const uchar *pos, size_t length)
{
#ifdef NOT_USED
const uchar *end=pos+length;
for ( ; pos != end ; pos++)
crc=((crc << 8) + *((uchar*) pos)) + (crc >> (8*sizeof(ha_checksum)-8));
return crc;
#else
return (ha_checksum)crc32((uint)crc, pos, (uint)length);
#endif
}
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