mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 03:52:35 +01:00
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/* Copyright (C) 2000 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
|
|
|
|
|
|
#include <my_global.h>
|
|
#include <my_sys.h>
|
|
#include <zlib.h>
|
|
|
|
ha_checksum my_crc_dbug_check= 1; /* Unlikely number */
|
|
|
|
/*
|
|
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)
|
|
{
|
|
crc= (ha_checksum) crc32((uint)crc, pos, length);
|
|
DBUG_PRINT("info", ("crc: %lu", (ulong) crc));
|
|
if (crc == my_crc_dbug_check)
|
|
my_debug_put_break_here();
|
|
return crc;
|
|
}
|