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42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#include <my_global.h>
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#include <my_sys.h>
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#include <zlib.h>
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/*
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Calculate a long checksum for a memoryblock.
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SYNOPSIS
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my_checksum()
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crc start value for crc
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pos pointer to memory block
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length length of the block
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*/
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ha_checksum my_checksum(ha_checksum crc, const uchar *pos, size_t length)
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{
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#ifdef HAVE_CRC32_VPMSUM
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extern unsigned int crc32ieee_vpmsum(unsigned int crc, const unsigned char *p,
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unsigned long len);
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crc= (ha_checksum) crc32ieee_vpmsum((uint) crc, pos, (uint) length);
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#else
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crc= (ha_checksum) crc32((uint)crc, pos, (uint) length);
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#endif
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DBUG_PRINT("info", ("crc: %lu", (ulong) crc));
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return crc;
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}
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