605 lines
26 KiB
HTML
605 lines
26 KiB
HTML
<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="generator" content="Docutils 0.11: http://docutils.sourceforge.net/" />
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<title>Storage</title>
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<meta name="author" content="Arvid Norberg, arvid@rasterbar.com" />
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<link rel="stylesheet" type="text/css" href="../../css/base.css" />
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<link rel="stylesheet" type="text/css" href="../../css/rst.css" />
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<link rel="stylesheet" href="style.css" type="text/css" />
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<style type="text/css">
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/* Hides from IE-mac \*/
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* html pre { height: 1%; }
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/* End hide from IE-mac */
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</style>
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</head>
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<body>
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<div class="document" id="storage">
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<div id="container">
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<div id="headerNav">
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<ul>
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<li class="first"><a href="/">Home</a></li>
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<li><a href="../../products.html">Products</a></li>
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<li><a href="../../contact.html">Contact</a></li>
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</ul>
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</div>
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<div id="header">
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<div id="orange"></div>
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<div id="logo"></div>
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</div>
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<div id="main">
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<h1 class="title">Storage</h1>
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<table class="docinfo" frame="void" rules="none">
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<col class="docinfo-name" />
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<col class="docinfo-content" />
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<tbody valign="top">
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<tr><th class="docinfo-name">Author:</th>
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<td>Arvid Norberg, <a class="last reference external" href="mailto:arvid@rasterbar.com">arvid@rasterbar.com</a></td></tr>
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<tr><th class="docinfo-name">Version:</th>
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<td>1.0.0</td></tr>
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</tbody>
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</table>
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<div class="contents topic" id="table-of-contents">
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<p class="topic-title first">Table of contents</p>
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<ul class="simple">
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<li><a class="reference internal" href="#file-entry" id="id25">file_entry</a></li>
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<li><a class="reference internal" href="#file-slice" id="id26">file_slice</a></li>
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<li><a class="reference internal" href="#file-storage" id="id27">file_storage</a></li>
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</ul>
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</div>
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<a name="file_entry"></a><div class="section" id="file-entry">
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<h1>file_entry</h1>
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<p>Declared in "<a class="reference external" href="../include/libtorrent/file_storage.hpp">libtorrent/file_storage.hpp</a>"</p>
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<p>information about a file in a <a class="reference external" href="reference-Storage.html#file_storage">file_storage</a></p>
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<pre class="literal-block">
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struct file_entry
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{
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std::string path;
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std::string symlink_path;
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size_type offset;
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size_type size;
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size_type file_base;
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std::time_t mtime;
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sha1_hash filehash;
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bool pad_file:1;
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bool hidden_attribute:1;
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bool executable_attribute:1;
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bool symlink_attribute:1;
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};
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</pre>
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<a name="path"></a><dl class="docutils">
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<dt>path</dt>
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<dd>the full path of this file. The paths are unicode strings
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encoded in UTF-8.</dd>
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</dl>
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<a name="symlink_path"></a><dl class="docutils">
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<dt>symlink_path</dt>
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<dd>the path which this is a symlink to, or empty if this is
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not a symlink. This field is only used if the <tt class="docutils literal">symlink_attribute</tt> is set.</dd>
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</dl>
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<a name="offset"></a><dl class="docutils">
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<dt>offset</dt>
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<dd>the offset of this file inside the torrent</dd>
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</dl>
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<a name="size"></a><dl class="docutils">
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<dt>size</dt>
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<dd>the size of the file (in bytes) and <tt class="docutils literal">offset</tt> is the byte offset
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of the file within the torrent. i.e. the sum of all the sizes of the files
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before it in the list.</dd>
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</dl>
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<a name="file_base"></a><dl class="docutils">
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<dt>file_base</dt>
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<dd>the offset in the file where the storage should start. The normal
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case is to have this set to 0, so that the storage starts saving data at the start
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if the file. In cases where multiple files are mapped into the same file though,
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the <tt class="docutils literal">file_base</tt> should be set to an offset so that the different regions do
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not overlap. This is used when mapping "unselected" files into a so-called part
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file.</dd>
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</dl>
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<a name="mtime"></a><dl class="docutils">
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<dt>mtime</dt>
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<dd>the modification time of this file specified in posix time.</dd>
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</dl>
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<a name="filehash"></a><dl class="docutils">
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<dt>filehash</dt>
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<dd>a sha-1 hash of the content of the file, or zeroes, if no
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file hash was present in the torrent file. It can be used to potentially
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find alternative sources for the file.</dd>
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</dl>
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<a name="pad_file"></a><dl class="docutils">
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<dt>pad_file</dt>
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<dd>set to true for files that are not part of the data of the torrent.
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They are just there to make sure the next file is aligned to a particular byte offset
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or piece boundry. These files should typically be hidden from an end user. They are
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not written to disk.</dd>
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</dl>
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<a name="hidden_attribute"></a><dl class="docutils">
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<dt>hidden_attribute</dt>
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<dd>true if the file was marked as hidden (on windows).</dd>
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</dl>
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<a name="executable_attribute"></a><dl class="docutils">
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<dt>executable_attribute</dt>
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<dd>true if the file was marked as executable (posix)</dd>
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</dl>
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<a name="symlink_attribute"></a><dl class="docutils">
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<dt>symlink_attribute</dt>
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<dd>true if the file was a symlink. If this is the case
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the <tt class="docutils literal">symlink_index</tt> refers to a string which specifies the original location
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where the data for this file was found.</dd>
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</dl>
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<a name="file_slice"></a></div>
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<div class="section" id="file-slice">
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<h1>file_slice</h1>
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<p>Declared in "<a class="reference external" href="../include/libtorrent/file_storage.hpp">libtorrent/file_storage.hpp</a>"</p>
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<p>represents a window of a file in a torrent.</p>
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<p>The <tt class="docutils literal">file_index</tt> refers to the index of the file (in the <a class="reference external" href="reference-Core.html#torrent_info">torrent_info</a>).
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To get the path and filename, use <tt class="docutils literal">file_at()</tt> and give the <tt class="docutils literal">file_index</tt>
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as argument. The <tt class="docutils literal">offset</tt> is the byte offset in the file where the range
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starts, and <tt class="docutils literal">size</tt> is the number of bytes this range is. The size + offset
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will never be greater than the file size.</p>
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<pre class="literal-block">
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struct file_slice
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{
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int file_index;
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size_type offset;
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size_type size;
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};
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</pre>
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<a name="file_index"></a><dl class="docutils">
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<dt>file_index</dt>
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<dd>the index of the file</dd>
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</dl>
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<a name="offset"></a><dl class="docutils">
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<dt>offset</dt>
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<dd>the offset from the start of the file, in bytes</dd>
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</dl>
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<a name="size"></a><dl class="docutils">
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<dt>size</dt>
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<dd>the size of the window, in bytes</dd>
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</dl>
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<a name="file_storage"></a></div>
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<div class="section" id="file-storage">
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<h1>file_storage</h1>
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<p>Declared in "<a class="reference external" href="../include/libtorrent/file_storage.hpp">libtorrent/file_storage.hpp</a>"</p>
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<p>The <tt class="docutils literal">file_storage</tt> class represents a file list and the piece
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size. Everything necessary to interpret a regular bittorrent storage
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file structure.</p>
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<pre class="literal-block">
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class file_storage
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{
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bool <strong>is_valid</strong> () const;
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void <strong>reserve</strong> (int num_files);
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void <strong>add_file</strong> (std::string const& p, size_type size, int flags = 0
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, std::time_t mtime = 0, std::string const& s_p = "");
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void <strong>add_file</strong> (file_entry const& e, char const* filehash = 0);
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void <strong>rename_file</strong> (int index, std::string const& new_filename);
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void <strong>rename_file_borrow</strong> (int index, char const* new_filename, int len);
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std::vector<file_slice> <strong>map_block</strong> (int piece, size_type offset
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, int size) const;
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peer_request <strong>map_file</strong> (int file, size_type offset, int size) const;
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int <strong>num_files</strong> () const;
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file_entry <strong>at</strong> (int index) const;
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size_type <strong>total_size</strong> () const;
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void <strong>set_num_pieces</strong> (int n);
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int <strong>num_pieces</strong> () const;
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void <strong>set_piece_length</strong> (int l);
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int <strong>piece_length</strong> () const;
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int <strong>piece_size</strong> (int index) const;
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void <strong>set_name</strong> (std::string const& n);
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const std::string& <strong>name</strong> () const;
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void <strong>swap</strong> (file_storage& ti);
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void <strong>optimize</strong> (int pad_file_limit = -1, int alignment = -1);
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size_type <strong>file_size</strong> (int index) const;
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sha1_hash <strong>hash</strong> (int index) const;
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std::string <strong>file_name</strong> (int index) const;
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size_type <strong>file_offset</strong> (int index) const;
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time_t <strong>mtime</strong> (int index) const;
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bool <strong>pad_file_at</strong> (int index) const;
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std::string const& <strong>symlink</strong> (int index) const;
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std::string <strong>file_path</strong> (int index, std::string const& save_path = "") const;
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int <strong>file_flags</strong> (int index) const;
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void <strong>set_file_base</strong> (int index, size_type off);
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size_type <strong>file_base</strong> (int index) const;
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int <strong>file_index_at_offset</strong> (size_type offset) const;
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char const* <strong>file_name_ptr</strong> (int index) const;
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int <strong>file_name_len</strong> (int index) const;
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enum flags_t
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{
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pad_file,
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attribute_hidden,
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attribute_executable,
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attribute_symlink,
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};
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enum file_flags_t
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{
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flag_pad_file,
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flag_hidden,
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flag_executable,
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flag_symlink,
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};
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};
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</pre>
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<a name="is_valid()"></a><div class="section" id="is-valid">
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<h2>is_valid()</h2>
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<pre class="literal-block">
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bool <strong>is_valid</strong> () const;
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</pre>
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<p>returns true if the piece length has been initialized
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on the <a class="reference external" href="reference-Storage.html#file_storage">file_storage</a>. This is typically taken as a proxy
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of whether the <a class="reference external" href="reference-Storage.html#file_storage">file_storage</a> as a whole is initialized or
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not.</p>
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<a name="reserve()"></a></div>
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<div class="section" id="reserve">
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<h2>reserve()</h2>
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<pre class="literal-block">
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void <strong>reserve</strong> (int num_files);
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</pre>
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<p>allocates space for <tt class="docutils literal">num_files</tt> in the internal file list. This can
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be used to avoid reallocating the internal file list when the number
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of files to be added is known up-front.</p>
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<a name="add_file()"></a></div>
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<div class="section" id="add-file">
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<h2>add_file()</h2>
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<pre class="literal-block">
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void <strong>add_file</strong> (std::string const& p, size_type size, int flags = 0
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, std::time_t mtime = 0, std::string const& s_p = "");
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void <strong>add_file</strong> (file_entry const& e, char const* filehash = 0);
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</pre>
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<p>Adds a file to the file storage. The <tt class="docutils literal">flags</tt> argument sets attributes on the file.
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The file attributes is an extension and may not work in all bittorrent clients.</p>
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<p>For possible file attributes, see <a class="reference external" href="reference-Storage.html#flags_t">file_storage::flags_t</a>.</p>
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<p>If more files than one are added, certain restrictions to their paths apply.
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In a multi-file file storage (torrent), all files must share the same root directory.</p>
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<p>That is, the first path element of all files must be the same.
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This shared path element is also set to the name of the torrent. It
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can be changed by calling <tt class="docutils literal">set_name</tt>.</p>
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<p>The built in functions to traverse a directory to add files will
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make sure this requirement is fulfilled.</p>
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<a name="rename_file()"></a></div>
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<div class="section" id="rename-file">
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<h2>rename_file()</h2>
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<pre class="literal-block">
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void <strong>rename_file</strong> (int index, std::string const& new_filename);
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</pre>
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<p>renames the file at <tt class="docutils literal">index</tt> to <tt class="docutils literal">new_filename</tt>. Keep in mind
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that filenames are expected to be UTF-8 encoded.</p>
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<a name="rename_file_borrow()"></a></div>
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<div class="section" id="rename-file-borrow">
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<h2>rename_file_borrow()</h2>
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<pre class="literal-block">
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void <strong>rename_file_borrow</strong> (int index, char const* new_filename, int len);
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</pre>
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<p>this is a low-level function that sets the name of a file
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by making it reference a buffer that is not owned by the <a class="reference external" href="reference-Storage.html#file_storage">file_storage</a>.
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it's an optimization used when loading .torrent files, to not
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duplicate names in memory.</p>
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<a name="map_block()"></a></div>
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<div class="section" id="map-block">
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<h2>map_block()</h2>
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<pre class="literal-block">
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std::vector<file_slice> <strong>map_block</strong> (int piece, size_type offset
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, int size) const;
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</pre>
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<p>returns a list of <a class="reference external" href="reference-Storage.html#file_slice">file_slice</a> objects representing the portions of
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files the specified piece index, byte offset and size range overlaps.
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this is the inverse mapping of <a class="reference external" href="reference-Core.html#map_file()">map_file()</a>.</p>
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<a name="map_file()"></a></div>
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<div class="section" id="map-file">
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<h2>map_file()</h2>
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<pre class="literal-block">
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peer_request <strong>map_file</strong> (int file, size_type offset, int size) const;
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</pre>
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<p>returns a <a class="reference external" href="reference-Core.html#peer_request">peer_request</a> representing the piece index, byte offset
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and size the specified file range overlaps. This is the inverse
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mapping ove <a class="reference external" href="reference-Core.html#map_block()">map_block()</a>.</p>
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<a name="num_files()"></a></div>
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<div class="section" id="num-files">
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<h2>num_files()</h2>
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<pre class="literal-block">
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int <strong>num_files</strong> () const;
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</pre>
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<p>returns the number of files in the <a class="reference external" href="reference-Storage.html#file_storage">file_storage</a></p>
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<a name="at()"></a></div>
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<div class="section" id="at">
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<h2>at()</h2>
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<pre class="literal-block">
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file_entry <strong>at</strong> (int index) const;
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</pre>
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<p>returns a <a class="reference external" href="reference-Storage.html#file_entry">file_entry</a> with information about the file
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at <tt class="docutils literal">index</tt>. Index must be in the range [0, <tt class="docutils literal">num_files()</tt> ).</p>
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<a name="total_size()"></a></div>
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<div class="section" id="total-size">
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<h2>total_size()</h2>
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<pre class="literal-block">
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size_type <strong>total_size</strong> () const;
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</pre>
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<p>returns the total number of bytes all the files in this torrent spans</p>
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<a name="num_pieces()"></a>
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<a name="set_num_pieces()"></a></div>
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<div class="section" id="num-pieces-set-num-pieces">
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<h2>num_pieces() set_num_pieces()</h2>
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<pre class="literal-block">
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void <strong>set_num_pieces</strong> (int n);
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int <strong>num_pieces</strong> () const;
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</pre>
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<p>set and get the number of pieces in the torrent</p>
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<a name="piece_length()"></a>
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<a name="set_piece_length()"></a></div>
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<div class="section" id="piece-length-set-piece-length">
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<h2>piece_length() set_piece_length()</h2>
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<pre class="literal-block">
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void <strong>set_piece_length</strong> (int l);
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int <strong>piece_length</strong> () const;
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</pre>
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<p>set and get the size of each piece in this torrent. This size is typically an even power
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of 2. It doesn't have to be though. It should be divisible by 16kiB however.</p>
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<a name="piece_size()"></a></div>
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<div class="section" id="piece-size">
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<h2>piece_size()</h2>
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<pre class="literal-block">
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int <strong>piece_size</strong> (int index) const;
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</pre>
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<p>returns the piece size of <tt class="docutils literal">index</tt>. This will be the same as <a class="reference external" href="reference-Core.html#piece_length()">piece_length()</a>, except
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for the last piece, which may be shorter.</p>
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<a name="set_name()"></a>
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<a name="name()"></a></div>
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<div class="section" id="set-name-name">
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<h2>set_name() name()</h2>
|
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<pre class="literal-block">
|
|
void <strong>set_name</strong> (std::string const& n);
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const std::string& <strong>name</strong> () const;
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</pre>
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<p>set and get the name of this torrent. For multi-file torrents, this is also
|
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the name of the root directory all the files are stored in.</p>
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<a name="swap()"></a></div>
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<div class="section" id="swap">
|
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<h2>swap()</h2>
|
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<pre class="literal-block">
|
|
void <strong>swap</strong> (file_storage& ti);
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</pre>
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<p>swap all content of <em>this</em> with <em>ti</em>.</p>
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<a name="optimize()"></a></div>
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<div class="section" id="optimize">
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<h2>optimize()</h2>
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<pre class="literal-block">
|
|
void <strong>optimize</strong> (int pad_file_limit = -1, int alignment = -1);
|
|
</pre>
|
|
<p>if pad_file_limit >= 0, files larger than that limit will be padded,
|
|
default is to not add any padding (-1). The alignment specifies the
|
|
alignment files should be padded to. This defaults to the piece size
|
|
(-1) but it may also make sense to set it to 16 kiB, or something
|
|
divisible by 16 kiB.
|
|
If pad_file_limit is 0, every file will be padded (except empty ones).</p>
|
|
<a name="mtime()"></a>
|
|
<a name="hash()"></a>
|
|
<a name="symlink()"></a>
|
|
<a name="file_name()"></a>
|
|
<a name="pad_file_at()"></a>
|
|
<a name="file_size()"></a>
|
|
<a name="file_path()"></a>
|
|
<a name="file_offset()"></a></div>
|
|
<div class="section" id="mtime-hash-symlink-file-name-pad-file-at-file-size-file-path-file-offset">
|
|
<h2>mtime() hash() symlink() file_name() pad_file_at() file_size() file_path() file_offset()</h2>
|
|
<pre class="literal-block">
|
|
size_type <strong>file_size</strong> (int index) const;
|
|
sha1_hash <strong>hash</strong> (int index) const;
|
|
std::string <strong>file_name</strong> (int index) const;
|
|
size_type <strong>file_offset</strong> (int index) const;
|
|
time_t <strong>mtime</strong> (int index) const;
|
|
bool <strong>pad_file_at</strong> (int index) const;
|
|
std::string const& <strong>symlink</strong> (int index) const;
|
|
std::string <strong>file_path</strong> (int index, std::string const& save_path = "") const;
|
|
</pre>
|
|
<p>These functions are used to query attributes of files at
|
|
a given index.</p>
|
|
<p>The <tt class="docutils literal">file_hash()</tt> is a sha-1 hash of the file, or 0 if none was
|
|
provided in the torrent file. This can potentially be used to
|
|
join a bittorrent network with other file sharing networks.</p>
|
|
<p>The <tt class="docutils literal">mtime()</tt> is the modification time is the posix
|
|
time when a file was last modified when the torrent
|
|
was created, or 0 if it was not included in the torrent file.</p>
|
|
<p><tt class="docutils literal">file_path()</tt> returns the full path to a file.</p>
|
|
<p><tt class="docutils literal">file_size()</tt> returns the size of a file.</p>
|
|
<p><tt class="docutils literal">pad_file_at()</tt> returns true if the file at the given
|
|
index is a pad-file.</p>
|
|
<p><tt class="docutils literal">file_name()</tt> returns <em>just</em> the name of the file, whereas
|
|
<tt class="docutils literal">file_path()</tt> returns the path (inside the torrent file) with
|
|
the filename appended.</p>
|
|
<p><tt class="docutils literal">file_offset()</tt> returns the byte offset within the torrent file
|
|
where this file starts. It can be used to map the file to a piece
|
|
index (given the piece size).</p>
|
|
<a name="file_flags()"></a></div>
|
|
<div class="section" id="file-flags">
|
|
<h2>file_flags()</h2>
|
|
<pre class="literal-block">
|
|
int <strong>file_flags</strong> (int index) const;
|
|
</pre>
|
|
<p>returns a bitmask of flags from <a class="reference external" href="reference-Storage.html#file_flags_t">file_flags_t</a> that apply
|
|
to file at <tt class="docutils literal">index</tt>.</p>
|
|
<a name="file_base()"></a>
|
|
<a name="set_file_base()"></a></div>
|
|
<div class="section" id="file-base-set-file-base">
|
|
<h2>file_base() set_file_base()</h2>
|
|
<pre class="literal-block">
|
|
void <strong>set_file_base</strong> (int index, size_type off);
|
|
size_type <strong>file_base</strong> (int index) const;
|
|
</pre>
|
|
<p>The file base of a file is the offset within the file on the filsystem
|
|
where it starts to write. For the most part, this is always 0. It's
|
|
possible to map several files (in the torrent) into a single file on
|
|
the filesystem by making them all point to the same filename, but with
|
|
different file bases, so that they don't overlap.
|
|
<a class="reference external" href="reference-Core.html#remap_files()">torrent_info::remap_files()</a> can be used to use a new file layout.</p>
|
|
<a name="file_index_at_offset()"></a></div>
|
|
<div class="section" id="file-index-at-offset">
|
|
<h2>file_index_at_offset()</h2>
|
|
<pre class="literal-block">
|
|
int <strong>file_index_at_offset</strong> (size_type offset) const;
|
|
</pre>
|
|
<p>returns the index of the file at the given offset in the torrent</p>
|
|
<a name="file_name_len()"></a>
|
|
<a name="file_name_ptr()"></a></div>
|
|
<div class="section" id="file-name-len-file-name-ptr">
|
|
<h2>file_name_len() file_name_ptr()</h2>
|
|
<pre class="literal-block">
|
|
char const* <strong>file_name_ptr</strong> (int index) const;
|
|
int <strong>file_name_len</strong> (int index) const;
|
|
</pre>
|
|
<p>low-level function. returns a pointer to the internal storage for
|
|
the filename. This string may not be null terinated!
|
|
the <tt class="docutils literal">file_name_len()</tt> function returns the length of the filename.</p>
|
|
<a name="flags_t"></a></div>
|
|
<div class="section" id="enum-flags-t">
|
|
<h2>enum flags_t</h2>
|
|
<p>Declared in "<a class="reference external" href="../include/libtorrent/file_storage.hpp">libtorrent/file_storage.hpp</a>"</p>
|
|
<table border="1" class="docutils">
|
|
<colgroup>
|
|
<col width="25%" />
|
|
<col width="8%" />
|
|
<col width="67%" />
|
|
</colgroup>
|
|
<thead valign="bottom">
|
|
<tr><th class="head">name</th>
|
|
<th class="head">value</th>
|
|
<th class="head">description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody valign="top">
|
|
<tr><td>pad_file</td>
|
|
<td>1</td>
|
|
<td>the file is a pad file. It's required to contain zeroes
|
|
at it will not be saved to disk. Its purpose is to make
|
|
the following file start on a piece boundary.</td>
|
|
</tr>
|
|
<tr><td>attribute_hidden</td>
|
|
<td>2</td>
|
|
<td>this file has the hidden attribute set. This is primarily
|
|
a windows attribute</td>
|
|
</tr>
|
|
<tr><td>attribute_executable</td>
|
|
<td>4</td>
|
|
<td>this file has the executable attribute set.</td>
|
|
</tr>
|
|
<tr><td>attribute_symlink</td>
|
|
<td>8</td>
|
|
<td>this file is a symbilic link. It should have a link
|
|
target string associated with it.</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<a name="file_flags_t"></a></div>
|
|
<div class="section" id="enum-file-flags-t">
|
|
<h2>enum file_flags_t</h2>
|
|
<p>Declared in "<a class="reference external" href="../include/libtorrent/file_storage.hpp">libtorrent/file_storage.hpp</a>"</p>
|
|
<table border="1" class="docutils">
|
|
<colgroup>
|
|
<col width="23%" />
|
|
<col width="9%" />
|
|
<col width="68%" />
|
|
</colgroup>
|
|
<thead valign="bottom">
|
|
<tr><th class="head">name</th>
|
|
<th class="head">value</th>
|
|
<th class="head">description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody valign="top">
|
|
<tr><td>flag_pad_file</td>
|
|
<td>1</td>
|
|
<td>this file is a pad file. The creator of the
|
|
torrent promises the file is entirely filled with
|
|
zeroes and does not need to be downloaded. The
|
|
purpose is just to align the next file to either
|
|
a block or piece boundary.</td>
|
|
</tr>
|
|
<tr><td>flag_hidden</td>
|
|
<td>2</td>
|
|
<td>this file is hiddent (sets the hidden attribute
|
|
on windows)</td>
|
|
</tr>
|
|
<tr><td>flag_executable</td>
|
|
<td>4</td>
|
|
<td>this file is executable (sets the executable bit
|
|
on posix like systems)</td>
|
|
</tr>
|
|
<tr><td>flag_symlink</td>
|
|
<td>8</td>
|
|
<td>this file is a symlink. The symlink target is
|
|
specified in a separate field</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<a name="default_storage_constructor()"></a></div>
|
|
<div class="section" id="default-storage-constructor">
|
|
<h2>default_storage_constructor()</h2>
|
|
<p>Declared in "<a class="reference external" href="../include/libtorrent/storage_defs.hpp">libtorrent/storage_defs.hpp</a>"</p>
|
|
<pre class="literal-block">
|
|
storage_interface* <strong>default_storage_constructor</strong> (
|
|
file_storage const&, file_storage const* mapped, std::string const&, file_pool&
|
|
, std::vector<boost::uint8_t> const&);
|
|
</pre>
|
|
<p>the constructor function for the regular file storage. This is the
|
|
default value for <a class="reference external" href="reference-Session.html#storage">add_torrent_params::storage</a>.</p>
|
|
<a name="disabled_storage_constructor()"></a></div>
|
|
<div class="section" id="disabled-storage-constructor">
|
|
<h2>disabled_storage_constructor()</h2>
|
|
<p>Declared in "<a class="reference external" href="../include/libtorrent/storage_defs.hpp">libtorrent/storage_defs.hpp</a>"</p>
|
|
<pre class="literal-block">
|
|
storage_interface* <strong>disabled_storage_constructor</strong> (
|
|
file_storage const&, file_storage const* mapped, std::string const&, file_pool&
|
|
, std::vector<boost::uint8_t> const&);
|
|
</pre>
|
|
<p>the constructor function for the disabled storage. This can be used for
|
|
testing and benchmarking. It will throw away any data written to
|
|
it and return garbage for anything read from it.</p>
|
|
<a name="storage_mode_t"></a></div>
|
|
<div class="section" id="enum-storage-mode-t">
|
|
<h2>enum storage_mode_t</h2>
|
|
<p>Declared in "<a class="reference external" href="../include/libtorrent/storage_defs.hpp">libtorrent/storage_defs.hpp</a>"</p>
|
|
<table border="1" class="docutils">
|
|
<colgroup>
|
|
<col width="22%" />
|
|
<col width="7%" />
|
|
<col width="72%" />
|
|
</colgroup>
|
|
<thead valign="bottom">
|
|
<tr><th class="head">name</th>
|
|
<th class="head">value</th>
|
|
<th class="head">description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody valign="top">
|
|
<tr><td>storage_mode_allocate</td>
|
|
<td>0</td>
|
|
<td>All pieces will be written to their final position, all files will be
|
|
allocated in full when the torrent is first started. This is done with
|
|
<tt class="docutils literal">fallocate()</tt> and similar calls. This mode minimizes fragmentation.</td>
|
|
</tr>
|
|
<tr><td>storage_mode_sparse</td>
|
|
<td>1</td>
|
|
<td>All pieces will be written to the place where they belong and sparse files
|
|
will be used. This is the recommended, and default mode.</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|