forked from premiere/premiere-libtorrent
222 lines
6.2 KiB
C++
222 lines
6.2 KiB
C++
/*
|
|
|
|
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_FILE_HPP_INCLUDED
|
|
#define TORRENT_FILE_HPP_INCLUDED
|
|
|
|
#include <memory>
|
|
#include <string>
|
|
#include <functional>
|
|
|
|
#include "libtorrent/config.hpp"
|
|
#include "libtorrent/string_view.hpp"
|
|
#include "libtorrent/span.hpp"
|
|
#include "libtorrent/aux_/storage_utils.hpp"
|
|
#include "libtorrent/flags.hpp"
|
|
|
|
#include "libtorrent/aux_/disable_warnings_push.hpp"
|
|
|
|
#include <boost/noncopyable.hpp>
|
|
|
|
#ifdef TORRENT_WINDOWS
|
|
// windows part
|
|
#ifndef WIN32_LEAN_AND_MEAN
|
|
#define WIN32_LEAN_AND_MEAN
|
|
#endif
|
|
#include <windows.h>
|
|
#include <winioctl.h>
|
|
#include <sys/types.h>
|
|
#else
|
|
// posix part
|
|
#define _FILE_OFFSET_BITS 64
|
|
|
|
#ifndef _GNU_SOURCE
|
|
#define _GNU_SOURCE
|
|
#endif
|
|
|
|
#ifndef _XOPEN_SOURCE
|
|
#define _XOPEN_SOURCE 600
|
|
#endif
|
|
|
|
#include <unistd.h>
|
|
#include <sys/uio.h>
|
|
#include <fcntl.h>
|
|
#include <sys/types.h>
|
|
#include <dirent.h> // for DIR
|
|
|
|
#include "libtorrent/aux_/max_path.hpp" // for TORRENT_MAX_PATH
|
|
|
|
#undef _FILE_OFFSET_BITS
|
|
|
|
#endif
|
|
|
|
#include "libtorrent/aux_/disable_warnings_pop.hpp"
|
|
|
|
#include "libtorrent/error_code.hpp"
|
|
#include "libtorrent/assert.hpp"
|
|
#include "libtorrent/time.hpp"
|
|
|
|
namespace libtorrent {
|
|
|
|
#ifdef TORRENT_WINDOWS
|
|
using handle_type = HANDLE;
|
|
#else
|
|
using handle_type = int;
|
|
#endif
|
|
|
|
class TORRENT_EXTRA_EXPORT directory : public boost::noncopyable
|
|
{
|
|
public:
|
|
directory(std::string const& path, error_code& ec);
|
|
~directory();
|
|
void next(error_code& ec);
|
|
std::string file() const;
|
|
std::uint64_t inode() const;
|
|
bool done() const { return m_done; }
|
|
private:
|
|
#ifdef TORRENT_WINDOWS
|
|
HANDLE m_handle;
|
|
int m_inode;
|
|
WIN32_FIND_DATAW m_fd;
|
|
#else
|
|
DIR* m_handle;
|
|
// the dirent struct contains a zero-sized
|
|
// array at the end, it will end up referring
|
|
// to the m_name field
|
|
struct dirent m_dirent;
|
|
char m_name[TORRENT_MAX_PATH + 1]; // +1 to make room for terminating 0
|
|
#endif
|
|
bool m_done;
|
|
};
|
|
|
|
struct file;
|
|
|
|
using file_handle = std::shared_ptr<file>;
|
|
|
|
// hidden
|
|
struct open_mode_tag;
|
|
using open_mode_t = flags::bitfield_flag<std::uint32_t, open_mode_tag>;
|
|
|
|
// the open mode for files. Used for the file constructor or
|
|
// file::open().
|
|
namespace open_mode {
|
|
|
|
// open the file for reading only
|
|
constexpr open_mode_t read_only{0};
|
|
|
|
// open the file for writing only
|
|
constexpr open_mode_t write_only{1};
|
|
|
|
// open the file for reading and writing
|
|
constexpr open_mode_t read_write{2};
|
|
|
|
constexpr open_mode_t rw_mask = read_only | write_only | read_write;
|
|
|
|
// open the file in sparse mode (if supported by the
|
|
// filesystem).
|
|
constexpr open_mode_t sparse{0x4};
|
|
|
|
// don't update the access timestamps on the file (if
|
|
// supported by the operating system and filesystem).
|
|
// this generally improves disk performance.
|
|
constexpr open_mode_t no_atime{0x8};
|
|
|
|
// open the file for random access. This disables read-ahead
|
|
// logic
|
|
constexpr open_mode_t random_access{0x10};
|
|
|
|
// prevent the file from being opened by another process
|
|
// while it's still being held open by this handle
|
|
constexpr open_mode_t lock_file{0x20};
|
|
|
|
// don't put any pressure on the OS disk cache
|
|
// because of access to this file. We expect our
|
|
// files to be fairly large, and there is already
|
|
// a cache at the bittorrent block level. This
|
|
// may improve overall system performance by
|
|
// leaving running applications in the page cache
|
|
constexpr open_mode_t no_cache{0x40};
|
|
|
|
// this is only used for readv/writev flags
|
|
constexpr open_mode_t coalesce_buffers{0x100};
|
|
|
|
// when creating a file, set the hidden attribute (windows only)
|
|
constexpr open_mode_t attribute_hidden{0x200};
|
|
|
|
// when creating a file, set the executable attribute
|
|
constexpr open_mode_t attribute_executable{0x400};
|
|
|
|
// the mask of all attribute bits
|
|
constexpr open_mode_t attribute_mask = attribute_hidden | attribute_executable;
|
|
}
|
|
|
|
using namespace flags;
|
|
|
|
struct TORRENT_EXTRA_EXPORT file : boost::noncopyable
|
|
{
|
|
file();
|
|
file(std::string const& p, open_mode_t m, error_code& ec);
|
|
~file();
|
|
|
|
bool open(std::string const& p, open_mode_t m, error_code& ec);
|
|
bool is_open() const;
|
|
void close();
|
|
bool set_size(std::int64_t size, error_code& ec);
|
|
|
|
open_mode_t open_mode() const { return m_open_mode; }
|
|
|
|
std::int64_t writev(std::int64_t file_offset, span<iovec_t const> bufs
|
|
, error_code& ec, open_mode_t flags = open_mode_t{});
|
|
std::int64_t readv(std::int64_t file_offset, span<iovec_t const> bufs
|
|
, error_code& ec, open_mode_t flags = open_mode_t{});
|
|
|
|
std::int64_t get_size(error_code& ec) const;
|
|
|
|
// return the offset of the first byte that
|
|
// belongs to a data-region
|
|
std::int64_t sparse_end(std::int64_t start) const;
|
|
|
|
handle_type native_handle() const { return m_file_handle; }
|
|
|
|
private:
|
|
|
|
handle_type m_file_handle;
|
|
|
|
open_mode_t m_open_mode{};
|
|
#if defined TORRENT_WINDOWS
|
|
static bool has_manage_volume_privs;
|
|
#endif
|
|
};
|
|
}
|
|
|
|
#endif // TORRENT_FILE_HPP_INCLUDED
|