ReactOS Development > Doxygen

lib
cmlib

00001 /*
00002  * PROJECT:   registry manipulation library
00003  * LICENSE:   GPL - See COPYING in the top level directory
00004  * COPYRIGHT: Copyright 2005 Filip Navara <navaraf@reactos.org>
00005  *            Copyright 2001 - 2005 Eric Kohl
00006  */
00007 
00008 #include "cmlib.h"
00009 
00016 ULONG CMAPI
00017 HvpHiveHeaderChecksum(
00018    PHBASE_BLOCK HiveHeader)
00019 {
00020    PULONG Buffer = (PULONG)HiveHeader;
00021    ULONG Sum = 0;
00022    ULONG i;
00023 
00024    for (i = 0; i < 127; i++)
00025       Sum ^= Buffer[i];
00026    if (Sum == (ULONG)-1)
00027       Sum = (ULONG)-2;
00028    if (Sum == 0)
00029       Sum = 1;
00030 
00031    return Sum;
00032 }

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