/usr/include/boost/iostreams/seek.hpp is in libboost1.62-dev 1.62.0+dfsg-5.
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 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
// (C) Copyright 2003-2007 Jonathan Turkanis
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
// See http://www.boost.org/libs/iostreams for documentation.
#ifndef BOOST_IOSTREAMS_SEEK_HPP_INCLUDED
#define BOOST_IOSTREAMS_SEEK_HPP_INCLUDED
#if defined(_MSC_VER)
# pragma once
#endif
#include <boost/config.hpp> // DEDUCED_TYPENAME, MSVC.
#include <boost/integer_traits.hpp>
#include <boost/iostreams/categories.hpp>
#include <boost/iostreams/detail/dispatch.hpp>
#include <boost/iostreams/detail/ios.hpp> // streamsize, seekdir, openmode.
#include <boost/iostreams/detail/streambuf.hpp>
#include <boost/iostreams/detail/wrap_unwrap.hpp>
#include <boost/iostreams/operations_fwd.hpp>
#include <boost/iostreams/positioning.hpp>
#include <boost/mpl/if.hpp>
// Must come last.
#include <boost/iostreams/detail/config/disable_warnings.hpp>
namespace boost { namespace iostreams {
namespace detail {
template<typename T>
struct seek_device_impl;
template<typename T>
struct seek_filter_impl;
} // End namespace detail.
template<typename T>
inline std::streampos
seek( T& t, stream_offset off, BOOST_IOS::seekdir way,
BOOST_IOS::openmode which = BOOST_IOS::in | BOOST_IOS::out )
{
using namespace detail;
return seek_device_impl<T>::seek(detail::unwrap(t), off, way, which);
}
template<typename T, typename Device>
inline std::streampos
seek( T& t, Device& dev, stream_offset off, BOOST_IOS::seekdir way,
BOOST_IOS::openmode which = BOOST_IOS::in | BOOST_IOS::out )
{
using namespace detail;
return seek_filter_impl<T>::seek(detail::unwrap(t), dev, off, way, which);
}
namespace detail {
//------------------Definition of seek_device_impl----------------------------//
template<typename T>
struct seek_device_impl
: mpl::if_<
is_custom<T>,
operations<T>,
seek_device_impl<
BOOST_DEDUCED_TYPENAME
dispatch<
T, iostream_tag, istream_tag, ostream_tag,
streambuf_tag, two_head, any_tag
>::type
>
>::type
{ };
struct seek_impl_basic_ios {
template<typename T>
static std::streampos seek( T& t, stream_offset off,
BOOST_IOS::seekdir way,
BOOST_IOS::openmode which )
{
if ( way == BOOST_IOS::beg &&
( off < integer_traits<std::streamoff>::const_min ||
off > integer_traits<std::streamoff>::const_max ) )
{
return t.rdbuf()->pubseekpos(offset_to_position(off));
} else {
return t.rdbuf()->pubseekoff(off, way, which);
}
}
};
template<>
struct seek_device_impl<iostream_tag> : seek_impl_basic_ios { };
template<>
struct seek_device_impl<istream_tag> : seek_impl_basic_ios { };
template<>
struct seek_device_impl<ostream_tag> : seek_impl_basic_ios { };
template<>
struct seek_device_impl<streambuf_tag> {
template<typename T>
static std::streampos seek( T& t, stream_offset off,
BOOST_IOS::seekdir way,
BOOST_IOS::openmode which )
{
if ( way == BOOST_IOS::beg &&
( off < integer_traits<std::streamoff>::const_min ||
off > integer_traits<std::streamoff>::const_max ) )
{
return t.BOOST_IOSTREAMS_PUBSEEKPOS(offset_to_position(off));
} else {
return t.BOOST_IOSTREAMS_PUBSEEKOFF(off, way, which);
}
}
};
template<>
struct seek_device_impl<two_head> {
template<typename T>
static std::streampos seek( T& t, stream_offset off,
BOOST_IOS::seekdir way,
BOOST_IOS::openmode which )
{ return t.seek(off, way, which); }
};
template<>
struct seek_device_impl<any_tag> {
template<typename T>
static std::streampos seek( T& t, stream_offset off,
BOOST_IOS::seekdir way,
BOOST_IOS::openmode )
{ return t.seek(off, way); }
};
//------------------Definition of seek_filter_impl----------------------------//
template<typename T>
struct seek_filter_impl
: mpl::if_<
is_custom<T>,
operations<T>,
seek_filter_impl<
BOOST_DEDUCED_TYPENAME
dispatch<T, two_head, any_tag>::type
>
>::type
{ };
template<>
struct seek_filter_impl<two_head> {
template<typename T, typename Device>
static std::streampos seek( T& t, Device& d,
stream_offset off,
BOOST_IOS::seekdir way,
BOOST_IOS::openmode which )
{ return t.seek(d, off, way, which); }
};
template<>
struct seek_filter_impl<any_tag> {
template<typename T, typename Device>
static std::streampos seek( T& t, Device& d,
stream_offset off,
BOOST_IOS::seekdir way,
BOOST_IOS::openmode )
{ return t.seek(d, off, way); }
};
} // End namespace detail.
} } // End namespaces iostreams, boost.
#include <boost/iostreams/detail/config/enable_warnings.hpp>
#endif // #ifndef BOOST_IOSTREAMS_SEEK_HPP_INCLUDED
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