hivesum.c File Reference

#include "cmp.h"

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Functions
ULONG	HvpHeaderCheckSum (PHBASE_BLOCK BaseBlock)

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Function Documentation

ULONG HvpHeaderCheckSum (  PHBASE_BLOCK  BaseBlock  )

Definition at line 31 of file hivesum.c. Referenced by DoDump(), HvInitializeHive(), HvpDoWriteHive(), HvpGetHiveHeader(), HvpGetLogHeader(), and HvpWriteLog(). 00036 : 00037 00038 Compute the checksum for a hive disk header. 00039 00040 Arguments: 00041 00042 BaseBlock - supplies pointer to the header to checksum 00043 00044 Return Value: 00045 00046 the check sum. 00047 00048 --*/ 00049 { 00050 ULONG sum; 00051 ULONG i; 00052 00053 sum = 0; 00054 for (i = 0; i < 127; i++) { 00055 sum ^= ((PULONG)BaseBlock)[i]; 00056 } 00057 if (sum == (ULONG)-1) { 00058 sum = (ULONG)-2; 00059 } 00060 if (sum == 0) { 00061 sum = 1; 00062 } 00063 return sum; 00064 } }

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