334 lines
9.6 KiB
C++
334 lines
9.6 KiB
C++
/*
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Copyright (c) 2003-2014, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_FILE_HPP_INCLUDED
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#define TORRENT_FILE_HPP_INCLUDED
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#include <memory>
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#include <string>
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#ifdef _MSC_VER
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#pragma warning(push, 1)
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#endif
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#include <boost/noncopyable.hpp>
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#include "libtorrent/error_code.hpp"
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#include "libtorrent/size_type.hpp"
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#include "libtorrent/config.hpp"
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#include "libtorrent/intrusive_ptr_base.hpp"
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#ifdef TORRENT_WINDOWS
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// windows part
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <windows.h>
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#include <winioctl.h>
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#include <sys/types.h>
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#else
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// posix part
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#define _FILE_OFFSET_BITS 64
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#ifndef _XOPEN_SOURCE
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#define _XOPEN_SOURCE 600
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#endif
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#include <unistd.h>
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#include <sys/uio.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <dirent.h> // for DIR
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#undef _FILE_OFFSET_BITS
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#endif
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namespace libtorrent
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{
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struct file_status
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{
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size_type file_size;
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boost::uint64_t atime;
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boost::uint64_t mtime;
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boost::uint64_t ctime;
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enum {
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#if defined TORRENT_WINDOWS
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fifo = 0x1000, // named pipe (fifo)
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character_special = 0x2000, // character special
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directory = 0x4000, // directory
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regular_file = 0x8000 // regular
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#else
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fifo = 0010000, // named pipe (fifo)
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character_special = 0020000, // character special
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directory = 0040000, // directory
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block_special = 0060000, // block special
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regular_file = 0100000, // regular
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link = 0120000, // symbolic link
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socket = 0140000 // socket
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#endif
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} modes_t;
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int mode;
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};
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// internal flags for stat_file
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enum { dont_follow_links = 1 };
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TORRENT_EXTRA_EXPORT void stat_file(std::string f, file_status* s
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, error_code& ec, int flags = 0);
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TORRENT_EXTRA_EXPORT void rename(std::string const& f
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, std::string const& newf, error_code& ec);
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TORRENT_EXTRA_EXPORT void create_directories(std::string const& f
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, error_code& ec);
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TORRENT_EXTRA_EXPORT void create_directory(std::string const& f
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, error_code& ec);
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TORRENT_EXTRA_EXPORT void remove_all(std::string const& f
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, error_code& ec);
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TORRENT_EXTRA_EXPORT void remove(std::string const& f, error_code& ec);
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TORRENT_EXTRA_EXPORT bool exists(std::string const& f);
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TORRENT_EXTRA_EXPORT size_type file_size(std::string const& f);
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TORRENT_EXTRA_EXPORT bool is_directory(std::string const& f
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, error_code& ec);
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TORRENT_EXTRA_EXPORT void recursive_copy(std::string const& old_path
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, std::string const& new_path, error_code& ec);
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TORRENT_EXTRA_EXPORT void copy_file(std::string const& f
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, std::string const& newf, error_code& ec);
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TORRENT_EXTRA_EXPORT std::string split_path(std::string const& f);
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TORRENT_EXTRA_EXPORT char const* next_path_element(char const* p);
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TORRENT_EXTRA_EXPORT std::string extension(std::string const& f);
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TORRENT_EXTRA_EXPORT std::string remove_extension(std::string const& f);
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TORRENT_EXTRA_EXPORT void replace_extension(std::string& f, std::string const& ext);
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TORRENT_EXTRA_EXPORT bool is_root_path(std::string const& f);
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// internal used by create_torrent.hpp
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TORRENT_EXPORT std::string parent_path(std::string const& f);
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TORRENT_EXTRA_EXPORT bool has_parent_path(std::string const& f);
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// internal used by create_torrent.hpp
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TORRENT_EXPORT std::string filename(std::string const& f);
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TORRENT_EXTRA_EXPORT std::string combine_path(std::string const& lhs
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, std::string const& rhs);
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// internal used by create_torrent.hpp
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TORRENT_EXPORT std::string complete(std::string const& f);
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TORRENT_EXTRA_EXPORT bool is_complete(std::string const& f);
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TORRENT_EXTRA_EXPORT std::string current_working_directory();
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#if TORRENT_USE_UNC_PATHS
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TORRENT_EXTRA_EXPORT std::string canonicalize_path(std::string const& f);
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#endif
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class TORRENT_EXTRA_EXPORT directory : public boost::noncopyable
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{
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public:
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directory(std::string const& path, error_code& ec);
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~directory();
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void next(error_code& ec);
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std::string file() const;
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boost::uint64_t inode() const;
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bool done() const { return m_done; }
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private:
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#ifdef TORRENT_WINDOWS
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HANDLE m_handle;
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int m_inode;
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#if TORRENT_USE_WSTRING
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WIN32_FIND_DATAW m_fd;
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#else
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WIN32_FIND_DATAA m_fd;
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#endif
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#else
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DIR* m_handle;
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// the dirent struct contains a zero-sized
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// array at the end, it will end up referring
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// to the m_name field
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struct dirent m_dirent;
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char m_name[TORRENT_MAX_PATH + 1]; // +1 to make room for null
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#endif
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bool m_done;
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};
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struct TORRENT_EXTRA_EXPORT file: boost::noncopyable, intrusive_ptr_base<file>
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{
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// the open mode for files. Used for the file constructor or
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// file::open().
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enum open_mode_t
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{
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// open the file for reading only
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read_only = 0,
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// open the file for writing only
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write_only = 1,
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// open the file for reading and writing
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read_write = 2,
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// the mask for the bits determining read or write mode
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rw_mask = read_only | write_only | read_write,
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// indicate that the file should be opened in
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// *direct io* mode, i.e. bypassing the operating
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// system's disk cache, or as much as possible of it
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// depending on the system.
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// when a file is opened with no_buffer,
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// file offsets have to be aligned to
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// pos_alignment() and buffer addresses
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// to buf_alignment() and read/write sizes
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// to size_alignment()
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no_buffer = 4,
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// open the file in sparse mode (if supported by the
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// filesystem).
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sparse = 8,
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// don't update the access timestamps on the file (if
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// supported by the operating system and filesystem).
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// this generally improves disk performance.
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no_atime = 16,
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// open the file for random acces. This disables read-ahead
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// logic
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random_access = 32,
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// prevent the file from being opened by another process
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// while it's still being held open by this handle
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lock_file = 64,
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// when creating a file, set the hidden attribute (windows only)
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attribute_hidden = 0x1000,
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// when creating a file, set the executable attribute
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attribute_executable = 0x2000,
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// the mask of all attribute bits
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attribute_mask = attribute_hidden | attribute_executable
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};
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#ifdef TORRENT_WINDOWS
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struct iovec_t
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{
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void* iov_base;
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size_t iov_len;
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};
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#else
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typedef iovec iovec_t;
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#endif
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// use a typedef for the type of iovec_t::iov_base
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// since it may differ
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#ifdef TORRENT_SOLARIS
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typedef char* iovec_base_t;
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#else
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typedef void* iovec_base_t;
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#endif
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file();
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file(std::string const& p, int m, error_code& ec);
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~file();
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bool open(std::string const& p, int m, error_code& ec);
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bool is_open() const;
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void close();
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bool set_size(size_type size, error_code& ec);
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int open_mode() const { return m_open_mode; }
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// when opened in unbuffered mode, this is the
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// required alignment of file_offsets. i.e.
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// any (file_offset & (pos_alignment()-1)) == 0
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// is a precondition to read and write operations
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int pos_alignment() const;
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// when opened in unbuffered mode, this is the
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// required alignment of buffer addresses
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int buf_alignment() const;
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// read/write buffer sizes needs to be aligned to
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// this when in unbuffered mode
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int size_alignment() const;
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size_type writev(size_type file_offset, iovec_t const* bufs, int num_bufs, error_code& ec);
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size_type readv(size_type file_offset, iovec_t const* bufs, int num_bufs, error_code& ec);
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void hint_read(size_type file_offset, int len);
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size_type get_size(error_code& ec) const;
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// return the offset of the first byte that
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// belongs to a data-region
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size_type sparse_end(size_type start) const;
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size_type phys_offset(size_type offset);
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#ifdef TORRENT_WINDOWS
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HANDLE native_handle() const { return m_file_handle; }
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#else
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int native_handle() const { return m_fd; }
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#endif
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private:
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#ifdef TORRENT_WINDOWS
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HANDLE m_file_handle;
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#if TORRENT_USE_WSTRING
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std::wstring m_path;
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#else
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std::string m_path;
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#endif // TORRENT_USE_WSTRING
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#else // TORRENT_WINDOWS
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int m_fd;
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#endif // TORRENT_WINDOWS
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#if defined TORRENT_WINDOWS || defined TORRENT_LINUX || defined TORRENT_DEBUG
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static void init_file();
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static int m_page_size;
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#endif
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int m_open_mode;
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#if defined TORRENT_WINDOWS || defined TORRENT_LINUX
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mutable int m_sector_size;
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#endif
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#if defined TORRENT_WINDOWS
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mutable int m_cluster_size;
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static bool has_manage_volume_privs;
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#endif
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};
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}
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#endif // TORRENT_FILE_HPP_INCLUDED
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