/usr/include/dar/int_tools.hpp is in libdar-dev 2.4.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// dar - disk archive - a backup/restoration program
// Copyright (C) 2002-2052 Denis Corbin
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// to contact the author : http://dar.linux.free.fr/email.html
/*********************************************************************/
// $Id: int_tools.hpp,v 1.6 2011/01/09 17:25:58 edrusb Rel $
//
/*********************************************************************/
/// \file int_tools.hpp
/// \brief elementary operation for infinint integers
/// \ingroup Private
#ifndef INT_TOOLS_HPP
#define INT_TOOLS_HPP
#include "/usr/include/dar/libdar_my_config.h"
#include "/usr/include/dar/integers.hpp"
#include "/usr/include/dar/erreurs.hpp"
namespace libdar
{
/// \addtogroup Private
/// @{
typedef unsigned char int_tools_bitfield[8];
extern void int_tools_swap_bytes(unsigned char &a, unsigned char &b);
extern void int_tools_swap_bytes(unsigned char *a, U_I size);
extern void int_tools_expand_byte(unsigned char a, int_tools_bitfield &bit);
extern void int_tools_contract_byte(const int_tools_bitfield &b, unsigned char & a);
// integer (agregates) manipulations
// argument must be a regular interger (a bit field).
template <class T> extern T int_tools_rotate_right_one_bit(T v)
{
bool retenue = (v & 1) != 0;
v >>= 1;
if(retenue)
v |= T(1) << (sizeof(v)*8 - 1);
return v;
}
template <class T> extern T int_tools_maxof_agregate(T unused) { unused = 0; unused = ~unused; unused = unused > 0 ? unused : ~int_tools_rotate_right_one_bit(T(1)); return unused; }
template <class B> static B int_tools_higher_power_of_2(B val)
{
B i = 0;
while((val >> i) > 1)
i++;
return i;
}
/// @}
}
#endif
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