/usr/include/libtorrent/hex.hpp is in libtorrent-rasterbar-dev 1.1.5-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (c) 2003-2016, Arvid Norberg
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the distribution.
* Neither the name of the author nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TORRENT_HEX_HPP_INCLUDED
#define TORRENT_HEX_HPP_INCLUDED
#include "libtorrent/config.hpp"
#include "libtorrent/error_code.hpp"
#include "libtorrent/aux_/disable_warnings_push.hpp"
#include <string>
#include <boost/limits.hpp>
#include <boost/array.hpp>
#include "libtorrent/aux_/disable_warnings_pop.hpp"
namespace libtorrent
{
namespace detail {
TORRENT_EXTRA_EXPORT int hex_to_int(char in);
TORRENT_EXTRA_EXPORT bool is_hex(char const *in, int len);
}
// The overload taking a ``std::string`` converts (binary) the string ``s``
// to hexadecimal representation and returns it.
// The overload taking a ``char const*`` and a length converts the binary
// buffer [``in``, ``in`` + len) to hexadecimal and prints it to the buffer
// ``out``. The caller is responsible for making sure the buffer pointed to
// by ``out`` is large enough, i.e. has at least len * 2 bytes of space.
TORRENT_EXPORT std::string to_hex(std::string const& s);
TORRENT_EXPORT void to_hex(char const *in, int len, char* out);
// converts the buffer [``in``, ``in`` + len) from hexadecimal to
// binary. The binary output is written to the buffer pointed to
// by ``out``. The caller is responsible for making sure the buffer
// at ``out`` has enough space for the result to be written to, i.e.
// (len + 1) / 2 bytes.
TORRENT_EXPORT bool from_hex(char const *in, int len, char* out);
}
#endif // TORRENT_HEX_HPP_INCLUDED
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