<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>filemanager.cpp Example File | Qt Network 5.12.2</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtnetwork-index.html">Qt Network</a></td><td ><a href="qtnetwork-torrent-example.html">Torrent Example</a></td><td >filemanager.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtnetwork-index.html">Qt 5.12.2 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">filemanager.cpp Example File</h1> <span class="subtitle">torrent/filemanager.cpp</span> <!-- $$$torrent/filemanager.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "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 Qt Company Ltd 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "filemanager.h"</span> <span class="preprocessor">#include "metainfo.h"</span> <span class="preprocessor">#include <QByteArray></span> <span class="preprocessor">#include <QDir></span> <span class="preprocessor">#include <QFile></span> <span class="preprocessor">#include <QTimer></span> <span class="preprocessor">#include <QTimerEvent></span> <span class="preprocessor">#include <QCryptographicHash></span> FileManager<span class="operator">::</span>FileManager(<span class="type"><a href="../qtcore/qobject.html">QObject</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="../qtcore/qthread.html">QThread</a></span>(parent) { quit <span class="operator">=</span> <span class="keyword">false</span>; totalLength <span class="operator">=</span> <span class="number">0</span>; readId <span class="operator">=</span> <span class="number">0</span>; startVerification <span class="operator">=</span> <span class="keyword">false</span>; wokeUp <span class="operator">=</span> <span class="keyword">false</span>; newFile <span class="operator">=</span> <span class="keyword">false</span>; numPieces <span class="operator">=</span> <span class="number">0</span>; verifiedPieces<span class="operator">.</span>fill(<span class="keyword">false</span>); } FileManager<span class="operator">::</span><span class="operator">~</span>FileManager() { quit <span class="operator">=</span> <span class="keyword">true</span>; <span class="type">cond</span><span class="operator">.</span>wakeOne(); wait(); foreach (<span class="type"><a href="../qtcore/qfile.html">QFile</a></span> <span class="operator">*</span>file<span class="operator">,</span> files) { file<span class="operator">-</span><span class="operator">></span>close(); <span class="keyword">delete</span> file; } } <span class="type">int</span> FileManager<span class="operator">::</span>read(<span class="type">int</span> pieceIndex<span class="operator">,</span> <span class="type">int</span> offset<span class="operator">,</span> <span class="type">int</span> length) { ReadRequest request; request<span class="operator">.</span>pieceIndex <span class="operator">=</span> pieceIndex; request<span class="operator">.</span>offset <span class="operator">=</span> offset; request<span class="operator">.</span>length <span class="operator">=</span> length; <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); request<span class="operator">.</span>id <span class="operator">=</span> readId<span class="operator">+</span><span class="operator">+</span>; readRequests <span class="operator"><</span><span class="operator"><</span> request; <span class="keyword">if</span> (<span class="operator">!</span>wokeUp) { wokeUp <span class="operator">=</span> <span class="keyword">true</span>; <span class="type"><a href="../qtcore/qmetaobject.html">QMetaObject</a></span><span class="operator">::</span>invokeMethod(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"wakeUp"</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>QueuedConnection); } <span class="keyword">return</span> request<span class="operator">.</span>id; } <span class="type">void</span> FileManager<span class="operator">::</span>write(<span class="type">int</span> pieceIndex<span class="operator">,</span> <span class="type">int</span> offset<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> <span class="operator">&</span>data) { WriteRequest request; request<span class="operator">.</span>pieceIndex <span class="operator">=</span> pieceIndex; request<span class="operator">.</span>offset <span class="operator">=</span> offset; request<span class="operator">.</span>data <span class="operator">=</span> data; <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); writeRequests <span class="operator"><</span><span class="operator"><</span> request; <span class="keyword">if</span> (<span class="operator">!</span>wokeUp) { wokeUp <span class="operator">=</span> <span class="keyword">true</span>; <span class="type"><a href="../qtcore/qmetaobject.html">QMetaObject</a></span><span class="operator">::</span>invokeMethod(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"wakeUp"</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>QueuedConnection); } } <span class="type">void</span> FileManager<span class="operator">::</span>verifyPiece(<span class="type">int</span> pieceIndex) { <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); pendingVerificationRequests <span class="operator"><</span><span class="operator"><</span> pieceIndex; startVerification <span class="operator">=</span> <span class="keyword">true</span>; <span class="keyword">if</span> (<span class="operator">!</span>wokeUp) { wokeUp <span class="operator">=</span> <span class="keyword">true</span>; <span class="type"><a href="../qtcore/qmetaobject.html">QMetaObject</a></span><span class="operator">::</span>invokeMethod(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"wakeUp"</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>QueuedConnection); } } <span class="type">int</span> FileManager<span class="operator">::</span>pieceLengthAt(<span class="type">int</span> pieceIndex) <span class="keyword">const</span> { <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); <span class="keyword">return</span> (sha1s<span class="operator">.</span>size() <span class="operator">=</span><span class="operator">=</span> pieceIndex <span class="operator">+</span> <span class="number">1</span>) <span class="operator">?</span> (totalLength <span class="operator">%</span> pieceLength) : pieceLength; } <span class="type"><a href="../qtcore/qbitarray.html">QBitArray</a></span> FileManager<span class="operator">::</span>completedPieces() <span class="keyword">const</span> { <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); <span class="keyword">return</span> verifiedPieces; } <span class="type">void</span> FileManager<span class="operator">::</span>setCompletedPieces(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qbitarray.html">QBitArray</a></span> <span class="operator">&</span>pieces) { <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); verifiedPieces <span class="operator">=</span> pieces; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> FileManager<span class="operator">::</span>errorString() <span class="keyword">const</span> { <span class="keyword">return</span> errString; } <span class="type">void</span> FileManager<span class="operator">::</span>run() { <span class="keyword">if</span> (<span class="operator">!</span>generateFiles()) <span class="keyword">return</span>; <span class="keyword">do</span> { { <span class="comment">// Go to sleep if there's nothing to do.</span> <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); <span class="keyword">if</span> (<span class="operator">!</span>quit <span class="operator">&</span><span class="operator">&</span> readRequests<span class="operator">.</span>isEmpty() <span class="operator">&</span><span class="operator">&</span> writeRequests<span class="operator">.</span>isEmpty() <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>startVerification) <span class="type">cond</span><span class="operator">.</span>wait(<span class="operator">&</span>mutex); } <span class="comment">// Read pending read requests</span> mutex<span class="operator">.</span>lock(); <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span>ReadRequest<span class="operator">></span> newReadRequests <span class="operator">=</span> readRequests; readRequests<span class="operator">.</span>clear(); mutex<span class="operator">.</span>unlock(); <span class="keyword">while</span> (<span class="operator">!</span>newReadRequests<span class="operator">.</span>isEmpty()) { ReadRequest request <span class="operator">=</span> newReadRequests<span class="operator">.</span>takeFirst(); <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> block <span class="operator">=</span> readBlock(request<span class="operator">.</span>pieceIndex<span class="operator">,</span> request<span class="operator">.</span>offset<span class="operator">,</span> request<span class="operator">.</span>length); <span class="keyword">emit</span> dataRead(request<span class="operator">.</span>id<span class="operator">,</span> request<span class="operator">.</span>pieceIndex<span class="operator">,</span> request<span class="operator">.</span>offset<span class="operator">,</span> block); } <span class="comment">// Write pending write requests</span> mutex<span class="operator">.</span>lock(); <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span>WriteRequest<span class="operator">></span> newWriteRequests <span class="operator">=</span> writeRequests; writeRequests<span class="operator">.</span>clear(); <span class="keyword">while</span> (<span class="operator">!</span>quit <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>newWriteRequests<span class="operator">.</span>isEmpty()) { WriteRequest request <span class="operator">=</span> newWriteRequests<span class="operator">.</span>takeFirst(); writeBlock(request<span class="operator">.</span>pieceIndex<span class="operator">,</span> request<span class="operator">.</span>offset<span class="operator">,</span> request<span class="operator">.</span>data); } <span class="comment">// Process pending verification requests</span> <span class="keyword">if</span> (startVerification) { newPendingVerificationRequests <span class="operator">=</span> pendingVerificationRequests; pendingVerificationRequests<span class="operator">.</span>clear(); verifyFileContents(); startVerification <span class="operator">=</span> <span class="keyword">false</span>; } mutex<span class="operator">.</span>unlock(); newPendingVerificationRequests<span class="operator">.</span>clear(); } <span class="keyword">while</span> (<span class="operator">!</span>quit); <span class="comment">// Write pending write requests</span> mutex<span class="operator">.</span>lock(); <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span>WriteRequest<span class="operator">></span> newWriteRequests <span class="operator">=</span> writeRequests; writeRequests<span class="operator">.</span>clear(); mutex<span class="operator">.</span>unlock(); <span class="keyword">while</span> (<span class="operator">!</span>newWriteRequests<span class="operator">.</span>isEmpty()) { WriteRequest request <span class="operator">=</span> newWriteRequests<span class="operator">.</span>takeFirst(); writeBlock(request<span class="operator">.</span>pieceIndex<span class="operator">,</span> request<span class="operator">.</span>offset<span class="operator">,</span> request<span class="operator">.</span>data); } } <span class="type">void</span> FileManager<span class="operator">::</span>startDataVerification() { <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); startVerification <span class="operator">=</span> <span class="keyword">true</span>; <span class="type">cond</span><span class="operator">.</span>wakeOne(); } bool FileManager<span class="operator">::</span>generateFiles() { numPieces <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; <span class="comment">// Set up the thread local data</span> <span class="keyword">if</span> (metaInfo<span class="operator">.</span>fileForm() <span class="operator">=</span><span class="operator">=</span> MetaInfo<span class="operator">::</span>SingleFileForm) { <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); MetaInfoSingleFile singleFile <span class="operator">=</span> metaInfo<span class="operator">.</span>singleFile(); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> prefix; <span class="keyword">if</span> (<span class="operator">!</span>destinationPath<span class="operator">.</span>isEmpty()) { prefix <span class="operator">=</span> destinationPath; <span class="keyword">if</span> (<span class="operator">!</span>prefix<span class="operator">.</span>endsWith(<span class="char">'/'</span>)) prefix <span class="operator">+</span><span class="operator">=</span> <span class="char">'/'</span>; <span class="type"><a href="../qtcore/qdir.html">QDir</a></span> dir; <span class="keyword">if</span> (<span class="operator">!</span>dir<span class="operator">.</span>mkpath(prefix)) { errString <span class="operator">=</span> tr(<span class="string">"Failed to create directory %1"</span>)<span class="operator">.</span>arg(prefix); <span class="keyword">emit</span> error(); <span class="keyword">return</span> <span class="keyword">false</span>; } } <span class="type"><a href="../qtcore/qfile.html">QFile</a></span> <span class="operator">*</span>file <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qfile.html">QFile</a></span>(prefix <span class="operator">+</span> singleFile<span class="operator">.</span>name); <span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>open(<span class="type"><a href="../qtcore/qfile.html">QFile</a></span><span class="operator">::</span>ReadWrite)) { errString <span class="operator">=</span> tr(<span class="string">"Failed to open/create file %1: %2"</span>) <span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString()); <span class="keyword">emit</span> error(); <span class="keyword">delete</span> file; <span class="keyword">return</span> <span class="keyword">false</span>; } <span class="keyword">if</span> (file<span class="operator">-</span><span class="operator">></span>size() <span class="operator">!</span><span class="operator">=</span> singleFile<span class="operator">.</span>length) { newFile <span class="operator">=</span> <span class="keyword">true</span>; <span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>resize(singleFile<span class="operator">.</span>length)) { errString <span class="operator">=</span> tr(<span class="string">"Failed to resize file %1: %2"</span>) <span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString()); <span class="keyword">delete</span> file; <span class="keyword">emit</span> error(); <span class="keyword">return</span> <span class="keyword">false</span>; } } fileSizes <span class="operator"><</span><span class="operator"><</span> file<span class="operator">-</span><span class="operator">></span>size(); files <span class="operator"><</span><span class="operator"><</span> file; file<span class="operator">-</span><span class="operator">></span>close(); pieceLength <span class="operator">=</span> singleFile<span class="operator">.</span>pieceLength; totalLength <span class="operator">=</span> singleFile<span class="operator">.</span>length; sha1s <span class="operator">=</span> singleFile<span class="operator">.</span>sha1Sums; } <span class="keyword">else</span> { <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); <span class="type"><a href="../qtcore/qdir.html">QDir</a></span> dir; <span class="type"><a href="../qtcore/qstring.html">QString</a></span> prefix; <span class="keyword">if</span> (<span class="operator">!</span>destinationPath<span class="operator">.</span>isEmpty()) { prefix <span class="operator">=</span> destinationPath; <span class="keyword">if</span> (<span class="operator">!</span>prefix<span class="operator">.</span>endsWith(<span class="char">'/'</span>)) prefix <span class="operator">+</span><span class="operator">=</span> <span class="char">'/'</span>; } <span class="keyword">if</span> (<span class="operator">!</span>metaInfo<span class="operator">.</span>name()<span class="operator">.</span>isEmpty()) { prefix <span class="operator">+</span><span class="operator">=</span> metaInfo<span class="operator">.</span>name(); <span class="keyword">if</span> (<span class="operator">!</span>prefix<span class="operator">.</span>endsWith(<span class="char">'/'</span>)) prefix <span class="operator">+</span><span class="operator">=</span> <span class="char">'/'</span>; } <span class="keyword">if</span> (<span class="operator">!</span>dir<span class="operator">.</span>mkpath(prefix)) { errString <span class="operator">=</span> tr(<span class="string">"Failed to create directory %1"</span>)<span class="operator">.</span>arg(prefix); <span class="keyword">emit</span> error(); <span class="keyword">return</span> <span class="keyword">false</span>; } foreach (<span class="keyword">const</span> MetaInfoMultiFile <span class="operator">&</span>entry<span class="operator">,</span> metaInfo<span class="operator">.</span>multiFiles()) { <span class="type"><a href="../qtcore/qstring.html">QString</a></span> filePath <span class="operator">=</span> <span class="type"><a href="../qtcore/qfileinfo.html">QFileInfo</a></span>(prefix <span class="operator">+</span> entry<span class="operator">.</span>path)<span class="operator">.</span>path(); <span class="keyword">if</span> (<span class="operator">!</span><span class="type"><a href="../qtcore/qfile.html">QFile</a></span><span class="operator">::</span>exists(filePath)) { <span class="keyword">if</span> (<span class="operator">!</span>dir<span class="operator">.</span>mkpath(filePath)) { errString <span class="operator">=</span> tr(<span class="string">"Failed to create directory %1"</span>)<span class="operator">.</span>arg(filePath); <span class="keyword">emit</span> error(); <span class="keyword">return</span> <span class="keyword">false</span>; } } <span class="type"><a href="../qtcore/qfile.html">QFile</a></span> <span class="operator">*</span>file <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qfile.html">QFile</a></span>(prefix <span class="operator">+</span> entry<span class="operator">.</span>path); <span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>open(<span class="type"><a href="../qtcore/qfile.html">QFile</a></span><span class="operator">::</span>ReadWrite)) { errString <span class="operator">=</span> tr(<span class="string">"Failed to open/create file %1: %2"</span>) <span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString()); <span class="keyword">emit</span> error(); <span class="keyword">delete</span> file; <span class="keyword">return</span> <span class="keyword">false</span>; } <span class="keyword">if</span> (file<span class="operator">-</span><span class="operator">></span>size() <span class="operator">!</span><span class="operator">=</span> entry<span class="operator">.</span>length) { newFile <span class="operator">=</span> <span class="keyword">true</span>; <span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>resize(entry<span class="operator">.</span>length)) { errString <span class="operator">=</span> tr(<span class="string">"Failed to resize file %1: %2"</span>) <span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString()); <span class="keyword">emit</span> error(); <span class="keyword">delete</span> file; <span class="keyword">return</span> <span class="keyword">false</span>; } } fileSizes <span class="operator"><</span><span class="operator"><</span> file<span class="operator">-</span><span class="operator">></span>size(); files <span class="operator"><</span><span class="operator"><</span> file; file<span class="operator">-</span><span class="operator">></span>close(); totalLength <span class="operator">+</span><span class="operator">=</span> entry<span class="operator">.</span>length; } sha1s <span class="operator">=</span> metaInfo<span class="operator">.</span>sha1Sums(); pieceLength <span class="operator">=</span> metaInfo<span class="operator">.</span>pieceLength(); } numPieces <span class="operator">=</span> sha1s<span class="operator">.</span>size(); <span class="keyword">return</span> <span class="keyword">true</span>; } <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> FileManager<span class="operator">::</span>readBlock(<span class="type">int</span> pieceIndex<span class="operator">,</span> <span class="type">int</span> offset<span class="operator">,</span> <span class="type">int</span> length) { <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> block; <span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span> startReadIndex <span class="operator">=</span> (<span class="type"><a href="../qtcore/qtglobal.html#quint64-typedef">quint64</a></span>(pieceIndex) <span class="operator">*</span> pieceLength) <span class="operator">+</span> offset; <span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span> currentIndex <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; <span class="operator">!</span>quit <span class="operator">&</span><span class="operator">&</span> i <span class="operator"><</span> files<span class="operator">.</span>size() <span class="operator">&</span><span class="operator">&</span> length <span class="operator">></span> <span class="number">0</span>; <span class="operator">+</span><span class="operator">+</span>i) { <span class="type"><a href="../qtcore/qfile.html">QFile</a></span> <span class="operator">*</span>file <span class="operator">=</span> files<span class="operator">[</span>i<span class="operator">]</span>; <span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span> currentFileSize <span class="operator">=</span> fileSizes<span class="operator">.</span>at(i); <span class="keyword">if</span> ((currentIndex <span class="operator">+</span> currentFileSize) <span class="operator">></span> startReadIndex) { <span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>isOpen()) { <span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>open(<span class="type"><a href="../qtcore/qfile.html">QFile</a></span><span class="operator">::</span>ReadWrite)) { errString <span class="operator">=</span> tr(<span class="string">"Failed to read from file %1: %2"</span>) <span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString()); <span class="keyword">emit</span> error(); <span class="keyword">break</span>; } } file<span class="operator">-</span><span class="operator">></span>seek(startReadIndex <span class="operator">-</span> currentIndex); <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> chunk <span class="operator">=</span> file<span class="operator">-</span><span class="operator">></span>read(<a href="../qtcore/qtglobal.html#qMin">qMin</a><span class="operator"><</span><span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">></span>(length<span class="operator">,</span> currentFileSize <span class="operator">-</span> file<span class="operator">-</span><span class="operator">></span>pos())); file<span class="operator">-</span><span class="operator">></span>close(); block <span class="operator">+</span><span class="operator">=</span> chunk; length <span class="operator">-</span><span class="operator">=</span> chunk<span class="operator">.</span>size(); startReadIndex <span class="operator">+</span><span class="operator">=</span> chunk<span class="operator">.</span>size(); <span class="keyword">if</span> (length <span class="operator"><</span> <span class="number">0</span>) { errString <span class="operator">=</span> tr(<span class="string">"Failed to read from file %1 (read %3 bytes): %2"</span>) <span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString())<span class="operator">.</span>arg(length); <span class="keyword">emit</span> error(); <span class="keyword">break</span>; } } currentIndex <span class="operator">+</span><span class="operator">=</span> currentFileSize; } <span class="keyword">return</span> block; } bool FileManager<span class="operator">::</span>writeBlock(<span class="type">int</span> pieceIndex<span class="operator">,</span> <span class="type">int</span> offset<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> <span class="operator">&</span>data) { <span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span> startWriteIndex <span class="operator">=</span> (<span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span>(pieceIndex) <span class="operator">*</span> pieceLength) <span class="operator">+</span> offset; <span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span> currentIndex <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> bytesToWrite <span class="operator">=</span> data<span class="operator">.</span>size(); <span class="type">int</span> written <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; <span class="operator">!</span>quit <span class="operator">&</span><span class="operator">&</span> i <span class="operator"><</span> files<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="type"><a href="../qtcore/qfile.html">QFile</a></span> <span class="operator">*</span>file <span class="operator">=</span> files<span class="operator">[</span>i<span class="operator">]</span>; <span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span> currentFileSize <span class="operator">=</span> fileSizes<span class="operator">.</span>at(i); <span class="keyword">if</span> ((currentIndex <span class="operator">+</span> currentFileSize) <span class="operator">></span> startWriteIndex) { <span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>isOpen()) { <span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>open(<span class="type"><a href="../qtcore/qfile.html">QFile</a></span><span class="operator">::</span>ReadWrite)) { errString <span class="operator">=</span> tr(<span class="string">"Failed to write to file %1: %2"</span>) <span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString()); <span class="keyword">emit</span> error(); <span class="keyword">break</span>; } } file<span class="operator">-</span><span class="operator">></span>seek(startWriteIndex <span class="operator">-</span> currentIndex); <span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span> bytesWritten <span class="operator">=</span> file<span class="operator">-</span><span class="operator">></span>write(data<span class="operator">.</span>constData() <span class="operator">+</span> written<span class="operator">,</span> <a href="../qtcore/qtglobal.html#qMin">qMin</a><span class="operator"><</span><span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">></span>(bytesToWrite<span class="operator">,</span> currentFileSize <span class="operator">-</span> file<span class="operator">-</span><span class="operator">></span>pos())); file<span class="operator">-</span><span class="operator">></span>close(); <span class="keyword">if</span> (bytesWritten <span class="operator"><</span><span class="operator">=</span> <span class="number">0</span>) { errString <span class="operator">=</span> tr(<span class="string">"Failed to write to file %1: %2"</span>) <span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString()); <span class="keyword">emit</span> error(); <span class="keyword">return</span> <span class="keyword">false</span>; } written <span class="operator">+</span><span class="operator">=</span> bytesWritten; startWriteIndex <span class="operator">+</span><span class="operator">=</span> bytesWritten; bytesToWrite <span class="operator">-</span><span class="operator">=</span> bytesWritten; <span class="keyword">if</span> (bytesToWrite <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) <span class="keyword">break</span>; } currentIndex <span class="operator">+</span><span class="operator">=</span> currentFileSize; } <span class="keyword">return</span> <span class="keyword">true</span>; } <span class="type">void</span> FileManager<span class="operator">::</span>verifyFileContents() { <span class="comment">// Verify all pieces the first time</span> <span class="keyword">if</span> (newPendingVerificationRequests<span class="operator">.</span>isEmpty()) { <span class="keyword">if</span> (verifiedPieces<span class="operator">.</span>count(<span class="keyword">true</span>) <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) { verifiedPieces<span class="operator">.</span>resize(sha1s<span class="operator">.</span>size()); <span class="type">int</span> oldPercent <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">if</span> (<span class="operator">!</span>newFile) { <span class="type">int</span> numPieces <span class="operator">=</span> sha1s<span class="operator">.</span>size(); <span class="keyword">for</span> (<span class="type">int</span> index <span class="operator">=</span> <span class="number">0</span>; index <span class="operator"><</span> numPieces; <span class="operator">+</span><span class="operator">+</span>index) { verifySinglePiece(index); <span class="type">int</span> percent <span class="operator">=</span> ((index <span class="operator">+</span> <span class="number">1</span>) <span class="operator">*</span> <span class="number">100</span>) <span class="operator">/</span> numPieces; <span class="keyword">if</span> (oldPercent <span class="operator">!</span><span class="operator">=</span> percent) { <span class="keyword">emit</span> verificationProgress(percent); oldPercent <span class="operator">=</span> percent; } } } } <span class="keyword">emit</span> verificationDone(); <span class="keyword">return</span>; } <span class="comment">// Verify all pending pieces</span> foreach (<span class="type">int</span> index<span class="operator">,</span> newPendingVerificationRequests) <span class="keyword">emit</span> pieceVerified(index<span class="operator">,</span> verifySinglePiece(index)); } bool FileManager<span class="operator">::</span>verifySinglePiece(<span class="type">int</span> pieceIndex) { <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> block <span class="operator">=</span> readBlock(pieceIndex<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> pieceLength); <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> sha1Sum <span class="operator">=</span> <span class="type"><a href="../qtcore/qcryptographichash.html">QCryptographicHash</a></span><span class="operator">::</span>hash(block<span class="operator">,</span> <span class="type"><a href="../qtcore/qcryptographichash.html">QCryptographicHash</a></span><span class="operator">::</span>Sha1); <span class="keyword">if</span> (sha1Sum <span class="operator">!</span><span class="operator">=</span> sha1s<span class="operator">.</span>at(pieceIndex)) <span class="keyword">return</span> <span class="keyword">false</span>; verifiedPieces<span class="operator">.</span>setBit(pieceIndex); <span class="keyword">return</span> <span class="keyword">true</span>; } <span class="type">void</span> FileManager<span class="operator">::</span>wakeUp() { <span class="type"><a href="../qtcore/qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex); wokeUp <span class="operator">=</span> <span class="keyword">false</span>; <span class="type">cond</span><span class="operator">.</span>wakeOne(); } </pre> </div> <!-- @@@torrent/filemanager.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>