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Implement RtlFindLeastSignificantBit() and RtlFindMostSignificantBit().

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svn path=/trunk/; revision=7991
This commit is contained in:
Eric Kohl 2004-02-02 13:34:01 +00:00
parent fb0bca238a
commit e61405acd5
1 changed files with 43 additions and 1 deletions
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44
reactos/lib/ntdll/rtl/bitmap.c
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@ -1,4 +1,4 @@
/* $Id: bitmap.c,v 1.6 2004/02/01 20:48:06 ekohl Exp $
/* $Id: bitmap.c,v 1.7 2004/02/02 13:34:01 ekohl Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -743,4 +743,46 @@ RtlSetBits (
}
}
/*
* @implemented
*/
CCHAR STDCALL
RtlFindLeastSignificantBit (IN ULONGLONG Set)
{
int i;
if (Set == 0ULL)
return -1;
for (i = 0; i < 64; i++)
{
if (Set & (1 << i))
return (CCHAR)i;
}
return -1;
}
/*
* @implemented
*/
CCHAR STDCALL
RtlFindMostSignificantBit (IN ULONGLONG Set)
{
int i;
if (Set == 0ULL)
return -1;
for (i = 63; i >= 0; i--)
{
if (Set & (1 << i))
return (CCHAR)i;
}
return -1;
}
/* EOF */