Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2025-04-22 13:10:39 +00:00
Code Issues Projects Releases Packages Wiki Activity

[RTL]

Browse source 
Fix a bug in RtlNumberOfSetBits

svn path=/trunk/; revision=56793
This commit is contained in:
Timo Kreuzer 2012-06-24 12:51:27 +00:00
parent 8e9219216a
commit b6b380a67b
1 changed files with 6 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
reactos/lib/rtl/bitmap.c
View file

@ -410,16 +410,18 @@ RtlNumberOfSetBits(
IN PRTL_BITMAP BitMapHeader) IN PRTL_BITMAP BitMapHeader)
{ {
PUCHAR Byte, MaxByte; PUCHAR Byte, MaxByte;
ULONG BitCount = 0; ULONG BitCount = 0, Shift;
Byte = (PUCHAR)BitMapHeader->Buffer; Byte = (PUCHAR)BitMapHeader->Buffer;
MaxByte = Byte + (BitMapHeader->SizeOfBitMap + 7) / 8; MaxByte = Byte + BitMapHeader->SizeOfBitMap / 8;
do while (Byte < MaxByte);
{ {
BitCount += BitCountTable[*Byte++]; BitCount += BitCountTable[*Byte++];
} }
while (Byte <= MaxByte);
Shift = 8 - (BitMapHeader->SizeOfBitMap & 7);
BitCount += BitCountTable[(*Byte) << Shift];
return BitCount; return BitCount;
} }