/usr/include/hphp/util/bits.h is in hhvm-dev 3.11.1+dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | /*
+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010-2015 Facebook, Inc. (http://www.facebook.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/
#ifndef incl_HPHP_BITS_H_
#define incl_HPHP_BITS_H_
namespace HPHP {
///////////////////////////////////////////////////////////////////////////////
template <typename T>
struct BitInfo {
static const T NumBits = sizeof(T) * 8;
static const T HighMask = 0x1 << (NumBits - 1);
};
template <unsigned int i, unsigned int m>
struct BitCountImpl {
enum { value = ((i & m) ? 1 : 0) + BitCountImpl< i, (m >> 1) >::value };
};
template <unsigned int i>
struct BitCountImpl<i, 0> {
enum { value = 0 };
};
template <unsigned int i>
struct BitCount: public BitCountImpl<i,
BitInfo<unsigned int>::HighMask>
{};
template <unsigned int i, bool p, unsigned int m>
struct BitPhaseImpl {
enum {
value = ((i & m) ? (p ? 0 : 1) : (p ? 1 : 0)) +
BitPhaseImpl<i, ((i & m) != 0), (m >> 1)>::value
};
};
template <unsigned int i, bool p>
struct BitPhaseImpl<i, p, 0> {
enum { value = 0 };
};
template <unsigned int i>
struct BitPhase : public BitPhaseImpl<i,
i & BitInfo<unsigned int>::HighMask,
BitInfo<unsigned int>::HighMask>
{};
///////////////////////////////////////////////////////////////////////////////
}
#endif // incl_HPHP_BITS_H_
|