RtlClearBitsEx

VOID __stdcall RtlClearBitsEx(_RTL_BITMAP_EX *BitMapHeader, UINT64 StartingIndex, UINT64 NumberToClear){
  UINT64 v4; 
  _BYTE *v5; 
  UINT64 v6; 
  char v7; 

  if( NumberToClear )
  {
    v4 = StartingIndex & 7;
    v5 = (char *)BitMapHeader->Buffer + (StartingIndex >> 3);
    v6 = NumberToClear;
    if( v4 + NumberToClear <= 8 )
    {
      v7 = ~(byte_14001DA00[NumberToClear] << v4);
LABEL_4:
      *v5 &= v7;
      return;
    }
    if( (_DWORD)v4 )
    {
      *v5++ &= byte_14001DA00[v4];
      v6 = NumberToClear - (unsigned int)(8 - v4);
    }
    if( v6 > 8 )
    {
      memset(v5, 0i64, v6 >> 3);
      v5 += v6 >> 3;
      v6 &= 7u;
    }
    if( v6 )
    {
      v7 = byte_14001A768[v6];
      goto LABEL_4;
    }
  }
}

Referenced by: