187 lines
6.7 KiB
C++
Executable File
187 lines
6.7 KiB
C++
Executable File
// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
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// (C) Copyright 2003-2007 Jonathan Turkanis
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
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// See http://www.boost.org/libs/iostreams for documentation.
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// Inspired by fdstream.hpp, (C) Copyright Nicolai M. Josuttis 2001,
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// available at http://www.josuttis.com/cppcode/fdstream.html.
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#ifndef BOOST_IOSTREAMS_FILE_DESCRIPTOR_HPP_INCLUDED
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#define BOOST_IOSTREAMS_FILE_DESCRIPTOR_HPP_INCLUDED
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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# pragma once
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#endif
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#include <string> // file pathnames.
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#include <boost/cstdint.hpp> // intmax_t.
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#include <boost/iostreams/categories.hpp> // tags.
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#include <boost/iostreams/detail/config/auto_link.hpp>
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#include <boost/iostreams/detail/config/dyn_link.hpp>
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#include <boost/iostreams/detail/config/windows_posix.hpp>
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#include <boost/iostreams/detail/ios.hpp> // openmode, seekdir, int types.
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#include <boost/iostreams/positioning.hpp>
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#include <boost/shared_ptr.hpp>
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// Must come last.
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#include <boost/config/abi_prefix.hpp>
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namespace boost { namespace iostreams {
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class BOOST_IOSTREAMS_DECL file_descriptor {
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public:
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#ifdef BOOST_IOSTREAMS_WINDOWS
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typedef void* handle_type; // A.k.a HANDLE
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#else
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typedef int handle_type;
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#endif
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typedef char char_type;
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struct category
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: seekable_device_tag,
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closable_tag
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{ };
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file_descriptor();
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explicit file_descriptor(handle_type fd, bool close_on_exit = false);
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#ifdef BOOST_IOSTREAMS_WINDOWS
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explicit file_descriptor(int fd, bool close_on_exit = false);
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#endif
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explicit file_descriptor( const std::string& path,
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BOOST_IOS::openmode mode =
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BOOST_IOS::in | BOOST_IOS::out,
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BOOST_IOS::openmode base_mode =
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BOOST_IOS::in | BOOST_IOS::out );
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explicit file_descriptor( const char* path,
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BOOST_IOS::openmode mode =
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BOOST_IOS::in | BOOST_IOS::out,
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BOOST_IOS::openmode base_mode =
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BOOST_IOS::in | BOOST_IOS::out );
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void open( const std::string& path,
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BOOST_IOS::openmode =
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BOOST_IOS::in | BOOST_IOS::out,
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BOOST_IOS::openmode base_mode =
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BOOST_IOS::in | BOOST_IOS::out );
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void open( const char* path,
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BOOST_IOS::openmode =
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BOOST_IOS::in | BOOST_IOS::out,
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BOOST_IOS::openmode base_mode =
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BOOST_IOS::in | BOOST_IOS::out );
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bool is_open() const { return pimpl_->flags_ != 0; }
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std::streamsize read(char_type* s, std::streamsize n);
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std::streamsize write(const char_type* s, std::streamsize n);
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std::streampos seek(stream_offset off, BOOST_IOS::seekdir way);
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void close();
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handle_type handle() const { return pimpl_->handle_; }
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private:
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struct impl {
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impl() :
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#ifdef BOOST_IOSTREAMS_WINDOWS
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handle_(reinterpret_cast<handle_type>(-1)),
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#else
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handle_(-1),
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#endif
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flags_(0)
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{ }
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impl(handle_type fd, bool close_on_exit)
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: handle_(fd), flags_(0)
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{ if (close_on_exit) flags_ |= impl::close_on_exit; }
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~impl()
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{ if (flags_ & close_on_exit) close_impl(*this); }
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enum flags {
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close_on_exit = 1,
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append = 4
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};
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handle_type handle_;
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int flags_;
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};
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friend struct impl;
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static void close_impl(impl&);
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#ifdef BOOST_IOSTREAMS_WINDOWS
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static handle_type int_to_handle(int fd);
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#endif
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shared_ptr<impl> pimpl_;
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};
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struct file_descriptor_source : private file_descriptor {
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#ifdef BOOST_IOSTREAMS_WINDOWS
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typedef void* handle_type; // A.k.a HANDLE
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#else
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typedef int handle_type;
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#endif
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typedef char char_type;
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struct category
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: input_seekable,
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device_tag,
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closable_tag
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{ };
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using file_descriptor::read;
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using file_descriptor::seek;
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using file_descriptor::open;
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using file_descriptor::is_open;
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using file_descriptor::close;
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using file_descriptor::handle;
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file_descriptor_source() { }
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explicit file_descriptor_source(handle_type fd, bool close_on_exit = false)
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: file_descriptor(fd, close_on_exit)
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{ }
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#ifdef BOOST_IOSTREAMS_WINDOWS
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explicit file_descriptor_source(int fd, bool close_on_exit = false)
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: file_descriptor(fd, close_on_exit)
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{ }
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#endif
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explicit file_descriptor_source( const std::string& path,
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BOOST_IOS::openmode m = BOOST_IOS::in )
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: file_descriptor(path, m & ~BOOST_IOS::out, BOOST_IOS::in)
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{ }
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explicit file_descriptor_source( const char* path,
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BOOST_IOS::openmode m = BOOST_IOS::in )
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: file_descriptor(path, m & ~BOOST_IOS::out, BOOST_IOS::in)
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{ }
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};
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struct file_descriptor_sink : private file_descriptor {
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#ifdef BOOST_IOSTREAMS_WINDOWS
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typedef void* handle_type; // A.k.a HANDLE
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#else
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typedef int handle_type;
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#endif
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typedef char char_type;
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struct category
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: output_seekable,
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device_tag,
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closable_tag
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{ };
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using file_descriptor::write;
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using file_descriptor::seek;
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using file_descriptor::open;
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using file_descriptor::is_open;
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using file_descriptor::close;
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using file_descriptor::handle;
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file_descriptor_sink() { }
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explicit file_descriptor_sink(handle_type fd, bool close_on_exit = false)
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: file_descriptor(fd, close_on_exit)
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{ }
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#ifdef BOOST_IOSTREAMS_WINDOWS
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explicit file_descriptor_sink(int fd, bool close_on_exit = false)
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: file_descriptor(fd, close_on_exit)
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{ }
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#endif
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explicit file_descriptor_sink( const std::string& path,
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BOOST_IOS::openmode m = BOOST_IOS::out )
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: file_descriptor(path, m & ~BOOST_IOS::in, BOOST_IOS::out)
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{ }
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explicit file_descriptor_sink( const char* path,
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BOOST_IOS::openmode m = BOOST_IOS::out )
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: file_descriptor(path, m & ~BOOST_IOS::in, BOOST_IOS::out)
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{ }
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};
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} } // End namespaces iostreams, boost.
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#include <boost/config/abi_suffix.hpp> // pops abi_suffix.hpp pragmas
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#endif // #ifndef BOOST_IOSTREAMS_FILE_DESCRIPTOR_HPP_INCLUDED
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