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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 678 insertions, 0 deletions

diff --git a/tests/benchmarks/corelib/io/qdiriterator/qfilesystemiterator.cpp b/tests/benchmarks/corelib/io/qdiriterator/qfilesystemiterator.cpp
new file mode 100644
index 0000000000..ba5f3887f9
--- /dev/null
+++ b/tests/benchmarks/corelib/io/qdiriterator/qfilesystemiterator.cpp
@@ -0,0 +1,678 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \since 4.5
+    \class QFileSystemIterator
+    \brief The QFileSystemIterator class provides an iterator for directory entrylists.
+
+    You can use QFileSystemIterator to navigate entries of a directory one at a time.
+    It is similar to QDir::entryList() and QDir::entryInfoList(), but because
+    it lists entries one at a time instead of all at once, it scales better
+    and is more suitable for large directories. It also supports listing
+    directory contents recursively, and following symbolic links. Unlike
+    QDir::entryList(), QFileSystemIterator does not support sorting.
+
+    The QFileSystemIterator constructor takes a QDir or a directory as
+    argument. After construction, the iterator is located before the first
+    directory entry. Here's how to iterate over all the entries sequentially:
+
+    \snippet doc/src/snippets/code/src.corelib.io.qdiriterator.cpp 0
+
+    The next() function returns the path to the next directory entry and
+    advances the iterator. You can also call filePath() to get the current
+    file path without advancing the iterator.  The fileName() function returns
+    only the name of the file, similar to how QDir::entryList() works. You can
+    also call fileInfo() to get a QFileInfo for the current entry.
+
+    Unlike Qt's container iterators, QFileSystemIterator is uni-directional (i.e.,
+    you cannot iterate directories in reverse order) and does not allow random
+    access.
+
+    QFileSystemIterator works with all supported file engines, and is implemented
+    using QAbstractFileEngineIterator.
+
+    \sa QDir, QDir::entryList(), QAbstractFileEngineIterator
+*/
+
+/*! \enum QFileSystemIterator::IteratorFlag
+
+    This enum describes flags that you can combine to configure the behavior
+    of QFileSystemIterator.
+
+    \value NoIteratorFlags The default value, representing no flags. The
+    iterator will return entries for the assigned path.
+
+    \value Subdirectories List entries inside all subdirectories as well.
+
+    \value FollowSymlinks When combined with Subdirectories, this flag
+    enables iterating through all subdirectories of the assigned path,
+    following all symbolic links. Symbolic link loops (e.g., "link" => "." or
+    "link" => "..") are automatically detected and ignored.
+*/
+
+#include "qfilesystemiterator.h"
+
+#include <QDebug>
+#include <QtCore/qset.h>
+#include <QtCore/qstack.h>
+#include <QtCore/qvariant.h>
+
+#ifdef Q_OS_WIN
+#   include <windows.h>
+#   include <atlbase.h>
+#else
+#   include <sys/stat.h>
+#   include <sys/types.h>
+#   include <dirent.h>
+#   include <errno.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+class QFileSystemIteratorPrivate
+{
+public:
+    QFileSystemIteratorPrivate(const QString &path, const QStringList &nameFilters,
+                        QDir::Filters filters, QFileSystemIterator::IteratorFlags flags);
+    ~QFileSystemIteratorPrivate();
+
+    void pushSubDirectory(const QByteArray &path);
+    void advance();
+    bool isAcceptable() const;
+    bool shouldFollowDirectory(const QFileInfo &);
+    //bool matchesFilters(const QAbstractFileEngineIterator *it) const;
+    inline bool atEnd() const { return m_dirPaths.isEmpty(); }
+
+#ifdef Q_OS_WIN
+    QStack<HANDLE>   m_dirStructs;
+    WIN32_FIND_DATA* m_entry;
+    WIN32_FIND_DATA  m_fileSearchResult;
+    bool             m_bFirstSearchResult;
+#else
+    QStack<DIR *> m_dirStructs;
+    dirent *m_entry;
+#endif
+
+    QSet<QString> visitedLinks;
+    QStack<QByteArray> m_dirPaths;
+    QFileInfo fileInfo;
+    QString currentFilePath;
+    QFileSystemIterator::IteratorFlags iteratorFlags;
+    QDir::Filters filters;
+    QStringList nameFilters;
+
+    enum { DontShowDir, ShowDotDotDir, ShowDotDir, ShowDir }
+        m_currentDirShown, m_nextDirShown;
+
+    QFileSystemIterator *q;
+
+private:
+    bool advanceHelper();  // returns true if we know we have something suitable
+};
+
+/*!
+    \internal
+*/
+QFileSystemIteratorPrivate::QFileSystemIteratorPrivate(const QString &path,
+    const QStringList &nameFilters, QDir::Filters filters,
+    QFileSystemIterator::IteratorFlags flags)
+  : iteratorFlags(flags)
+{
+    if (filters == QDir::NoFilter)
+        filters = QDir::AllEntries;
+    this->filters = filters;
+    this->nameFilters = nameFilters;
+
+    fileInfo.setFile(path);
+    QString dir = fileInfo.isSymLink() ? fileInfo.canonicalFilePath() : path;
+    pushSubDirectory(dir.toLocal8Bit());
+    // skip to acceptable entry
+    while (true) {
+        if (atEnd())
+            return;
+        if (isAcceptable())
+            return;
+        if (advanceHelper())
+            return;
+    }
+}
+
+/*!
+    \internal
+*/
+QFileSystemIteratorPrivate::~QFileSystemIteratorPrivate()
+{
+#ifdef Q_OS_WIN
+    while (!m_dirStructs.isEmpty())
+        ::FindClose(m_dirStructs.pop());
+#else
+    while (!m_dirStructs.isEmpty())
+        ::closedir(m_dirStructs.pop());
+#endif
+}
+
+#ifdef Q_OS_WIN
+static bool isDotOrDotDot(const wchar_t* name)
+{
+    if (name[0] == L'.' && name[1] == 0)
+        return true;
+    if (name[0] == L'.' && name[1] == L'.' && name[2] == 0)
+        return true;
+    return false;
+}
+#else
+static bool isDotOrDotDot(const char *name)
+{
+    if (name[0] == '.' && name[1] == 0)
+        return true;
+    if (name[0] == '.' && name[1] == '.' && name[2] == 0)
+        return true;
+    return false;
+}
+#endif
+
+/*!
+    \internal
+*/
+void QFileSystemIteratorPrivate::pushSubDirectory(const QByteArray &path)
+{
+/*
+    if (iteratorFlags & QFileSystemIterator::FollowSymlinks) {
+        if (fileInfo.filePath() != path)
+            fileInfo.setFile(path);
+        if (fileInfo.isSymLink()) {
+            visitedLinks << fileInfo.canonicalFilePath();
+        } else {
+            visitedLinks << fileInfo.absoluteFilePath();
+        }
+    }
+*/
+
+#ifdef Q_OS_WIN
+    wchar_t szSearchPath[MAX_PATH];
+    wcscpy(szSearchPath, QString(path).utf16());
+    wcscat(szSearchPath, L"\\*");
+    HANDLE dir = FindFirstFile(szSearchPath, &m_fileSearchResult);
+    m_bFirstSearchResult = true;
+#else
+    DIR *dir = ::opendir(path.constData());
+    //m_entry = ::readdir(dir);
+    //while (m_entry && isDotOrDotDot(m_entry->d_name))
+    //    m_entry = ::readdir(m_dirStructs.top());
+#endif
+    m_dirStructs.append(dir);
+    m_dirPaths.append(path);
+    m_entry = 0;
+    if (filters & QDir::Dirs)
+        m_nextDirShown = ShowDir;
+    else
+        m_nextDirShown = DontShowDir;
+    m_currentDirShown = DontShowDir;
+}
+
+/*!
+    \internal
+*/
+bool QFileSystemIteratorPrivate::isAcceptable() const
+{
+    if (!m_entry)
+        return false;
+    return true;
+}
+
+/*!
+    \internal
+*/
+
+
+void QFileSystemIteratorPrivate::advance()
+{
+    while (true) {
+        if (advanceHelper())
+            return;
+        if (atEnd())
+            return;
+        if (isAcceptable())
+            return;
+    }
+}
+
+bool QFileSystemIteratorPrivate::advanceHelper()
+{
+    if (m_dirStructs.isEmpty())
+        return true;
+
+    //printf("ADV %d %d\n", int(m_currentDirShown), int(m_nextDirShown));
+
+    if ((filters & QDir::Dirs)) {
+        m_currentDirShown = m_nextDirShown;
+        if (m_nextDirShown == ShowDir) {
+            //printf("RESTING ON DIR %s %x\n", m_dirPaths.top().constData(), int(filters));
+            m_nextDirShown = (filters & QDir::NoDotAndDotDot) ? DontShowDir : ShowDotDir;
+            // skip start directory itself
+            if (m_dirStructs.size() == 1 && m_currentDirShown == ShowDir)
+                return advanceHelper();
+            return true;
+        }
+        if (m_nextDirShown == ShowDotDir) {
+            //printf("RESTING ON DOT %s %x\n", m_dirPaths.top().constData(), int(filters));
+            m_nextDirShown = ShowDotDotDir;
+            return true;
+        }
+        if (m_nextDirShown == ShowDotDotDir) {
+            //printf("RESTING ON DOTDOT %s %x\n", m_dirPaths.top().constData(), int(filters));
+            m_nextDirShown = DontShowDir;
+            return true;
+        }
+        m_currentDirShown = DontShowDir;
+    }
+
+#ifdef Q_OS_WIN
+    m_entry = &m_fileSearchResult;
+    if (m_bFirstSearchResult) {
+        m_bFirstSearchResult = false;
+    } else {
+        if (!FindNextFile(m_dirStructs.top(), m_entry))
+            m_entry = 0;
+    }
+
+    while (m_entry && isDotOrDotDot(m_entry->cFileName))
+        if (!FindNextFile(m_dirStructs.top(), m_entry))
+            m_entry = 0;
+
+    if (!m_entry) {
+        m_dirPaths.pop();
+        FindClose(m_dirStructs.pop());
+        return false;
+    }
+
+    if (m_entry->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
+        QByteArray ba = m_dirPaths.top();
+        ba += '\\';
+        ba += QString::fromWCharArray(m_entry->cFileName);
+        pushSubDirectory(ba);
+    }
+#else
+    m_entry = ::readdir(m_dirStructs.top());
+    while (m_entry && isDotOrDotDot(m_entry->d_name))
+        m_entry = ::readdir(m_dirStructs.top());
+        //return false; // further iteration possibly needed
+    //printf("READ %p %s\n", m_entry, m_entry ? m_entry->d_name : "");
+
+    if (!m_entry) {
+        m_dirPaths.pop();
+        DIR *dir = m_dirStructs.pop();
+        ::closedir(dir);
+        return false; // further iteration possibly needed
+    }
+
+    const char *name = m_entry->d_name;
+
+    QByteArray ba = m_dirPaths.top();
+    ba += '/';
+    ba += name;
+    struct stat st;
+    lstat(ba.constData(), &st);
+
+    if (S_ISDIR(st.st_mode)) {
+        pushSubDirectory(ba);
+        return false; // further iteration possibly needed
+    }
+#endif
+    return false; // further iteration possiblye needed
+}
+
+/*!
+    \internal
+ */
+bool QFileSystemIteratorPrivate::shouldFollowDirectory(const QFileInfo &fileInfo)
+{
+    // If we're doing flat iteration, we're done.
+    if (!(iteratorFlags & QFileSystemIterator::Subdirectories))
+        return false;
+    
+    // Never follow non-directory entries
+    if (!fileInfo.isDir())
+        return false;
+
+
+    // Never follow . and ..
+    if (fileInfo.fileName() == QLatin1String(".") || fileInfo.fileName() == QLatin1String(".."))
+        return false;
+
+      
+    // Check symlinks
+    if (fileInfo.isSymLink() && !(iteratorFlags & QFileSystemIterator::FollowSymlinks)) {
+        // Follow symlinks only if FollowSymlinks was passed
+        return false;
+    }
+
+    // Stop link loops
+    if (visitedLinks.contains(fileInfo.canonicalFilePath()))
+        return false;
+    
+    return true;
+}
+    
+
+/*!
+    \internal
+
+    This convenience function implements the iterator's filtering logics and
+    applies then to the current directory entry.
+
+    It returns true if the current entry matches the filters (i.e., the
+    current entry will be returned as part of the directory iteration);
+    otherwise, false is returned.
+*/
+#if 0
+bool QFileSystemIteratorPrivate::matchesFilters(const QAbstractFileEngineIterator *it) const
+{
+    const bool filterPermissions = ((filters & QDir::PermissionMask)
+                                    && (filters & QDir::PermissionMask) != QDir::PermissionMask);
+    const bool skipDirs     = !(filters & (QDir::Dirs | QDir::AllDirs));
+    const bool skipFiles    = !(filters & QDir::Files);
+    const bool skipSymlinks = (filters & QDir::NoSymLinks);
+    const bool doReadable   = !filterPermissions || (filters & QDir::Readable);
+    const bool doWritable   = !filterPermissions || (filters & QDir::Writable);
+    const bool doExecutable = !filterPermissions || (filters & QDir::Executable);
+    const bool includeHidden = (filters & QDir::Hidden);
+    const bool includeSystem = (filters & QDir::System);
+
+#ifndef QT_NO_REGEXP
+    // Prepare name filters
+    QList<QRegExp> regexps;
+    bool hasNameFilters = !nameFilters.isEmpty() && !(nameFilters.contains(QLatin1String("*")));
+    if (hasNameFilters) {
+        for (int i = 0; i < nameFilters.size(); ++i) {
+            regexps << QRegExp(nameFilters.at(i),
+                               (filters & QDir::CaseSensitive) ? Qt::CaseSensitive : Qt::CaseInsensitive,
+                               QRegExp::Wildcard);
+        }
+    }
+#endif
+
+    QString fileName = it->currentFileName();
+    if (fileName.isEmpty()) {
+        // invalid entry
+        return false;
+    }
+
+    QFileInfo fi = it->currentFileInfo();
+    QString filePath = it->currentFilePath();
+
+#ifndef QT_NO_REGEXP
+    // Pass all entries through name filters, except dirs if the AllDirs
+    // filter is passed.
+    if (hasNameFilters && !((filters & QDir::AllDirs) && fi.isDir())) {
+        bool matched = false;
+        for (int i = 0; i < regexps.size(); ++i) {
+            if (regexps.at(i).exactMatch(fileName)) {
+                matched = true;
+                break;
+            }
+        }
+        if (!matched)
+            return false;
+    }
+#endif
+    
+    bool dotOrDotDot = (fileName == QLatin1String(".") || fileName == QLatin1String(".."));
+    if ((filters & QDir::NoDotAndDotDot) && dotOrDotDot)
+        return false;
+
+    bool isHidden = !dotOrDotDot && fi.isHidden();
+    if (!includeHidden && isHidden)
+        return false;
+
+    bool isSystem = (!fi.isFile() && !fi.isDir() && !fi.isSymLink())
+                    || (!fi.exists() && fi.isSymLink());
+    if (!includeSystem && isSystem)
+        return false;
+
+    bool alwaysShow = (filters & QDir::TypeMask) == 0
+        && ((isHidden && includeHidden)
+            || (includeSystem && isSystem));
+
+    // Skip files and directories
+    if ((filters & QDir::AllDirs) == 0 && skipDirs && fi.isDir()) {
+        if (!alwaysShow)
+            return false;
+    }
+
+    if ((skipFiles && (fi.isFile() || !fi.exists()))
+        || (skipSymlinks && fi.isSymLink())) {
+        if (!alwaysShow)
+            return false;
+    }
+
+    if (filterPermissions
+        && ((doReadable && !fi.isReadable())
+            || (doWritable && !fi.isWritable())
+            || (doExecutable && !fi.isExecutable()))) {
+        return false;
+    }
+
+    if (!includeSystem && !dotOrDotDot && ((fi.exists() && !fi.isFile() && !fi.isDir() && !fi.isSymLink())
+                                           || (!fi.exists() && fi.isSymLink()))) {
+        return false;
+    }
+    
+    return true;
+}
+#endif
+
+/*!
+    Constructs a QFileSystemIterator that can iterate over \a dir's entrylist, using
+    \a dir's name filters and regular filters. You can pass options via \a
+    flags to decide how the directory should be iterated.
+
+    By default, \a flags is NoIteratorFlags, which provides the same behavior
+    as in QDir::entryList().
+
+    The sorting in \a dir is ignored.
+
+    \sa atEnd(), next(), IteratorFlags
+*/
+QFileSystemIterator::QFileSystemIterator(const QDir &dir, IteratorFlags flags)
+    : d(new QFileSystemIteratorPrivate(dir.path(), dir.nameFilters(), dir.filter(), flags))
+{
+    d->q = this;
+}
+
+/*!
+    Constructs a QFileSystemIterator that can iterate over \a path, with no name
+    filtering and \a filters for entry filtering. You can pass options via \a
+    flags to decide how the directory should be iterated.
+
+    By default, \a filters is QDir::NoFilter, and \a flags is NoIteratorFlags,
+    which provides the same behavior as in QDir::entryList().
+
+    \sa atEnd(), next(), IteratorFlags
+*/
+QFileSystemIterator::QFileSystemIterator(const QString &path, QDir::Filters filters, IteratorFlags flags)
+    : d(new QFileSystemIteratorPrivate(path, QStringList(QLatin1String("*")), filters, flags))
+{
+    d->q = this;
+}
+
+/*!
+    Constructs a QFileSystemIterator that can iterate over \a path. You can pass
+    options via \a flags to decide how the directory should be iterated.
+
+    By default, \a flags is NoIteratorFlags, which provides the same behavior
+    as in QDir::entryList().
+
+    \sa atEnd(), next(), IteratorFlags
+*/
+QFileSystemIterator::QFileSystemIterator(const QString &path, IteratorFlags flags)
+    : d(new QFileSystemIteratorPrivate(path, QStringList(QLatin1String("*")), QDir::NoFilter, flags))
+{
+    d->q = this;
+}
+
+/*!
+    Constructs a QFileSystemIterator that can iterate over \a path, using \a
+    nameFilters and \a filters. You can pass options via \a flags to decide
+    how the directory should be iterated.
+
+    By default, \a flags is NoIteratorFlags, which provides the same behavior
+    as QDir::entryList().
+
+    \sa atEnd(), next(), IteratorFlags
+*/
+QFileSystemIterator::QFileSystemIterator(const QString &path, const QStringList &nameFilters,
+                           QDir::Filters filters, IteratorFlags flags)
+    : d(new QFileSystemIteratorPrivate(path, nameFilters, filters, flags))
+{
+    d->q = this;
+}
+
+/*!
+    Destroys the QFileSystemIterator.
+*/
+QFileSystemIterator::~QFileSystemIterator()
+{
+    delete d;
+}
+
+/*!
+    Advances the iterator to the next entry, and returns the file path of this
+    new entry. If atEnd() returns true, this function does nothing, and
+    returns a null QString.
+
+    You can call fileName() or filePath() to get the current entry file name
+    or path, or fileInfo() to get a QFileInfo for the current entry.
+
+    \sa hasNext(), fileName(), filePath(), fileInfo()
+*/
+void QFileSystemIterator::next()
+{
+    d->advance();
+}
+
+/*!
+    Returns true if there is at least one more entry in the directory;
+    otherwise, false is returned.
+
+    \sa next(), fileName(), filePath(), fileInfo()
+*/
+bool QFileSystemIterator::atEnd() const
+{
+    return d->atEnd();
+}
+
+/*!
+    Returns the file name for the current directory entry, without the path
+    prepended. If the current entry is invalid (i.e., isValid() returns
+    false), a null QString is returned.
+
+    This function is provided for the convenience when iterating single
+    directories. For recursive iteration, you should call filePath() or
+    fileInfo() instead.
+    
+    \sa filePath(), fileInfo()
+*/
+QString QFileSystemIterator::fileName() const
+{
+    if (d->atEnd() || !d->m_entry)
+        return QString();
+    if (d->m_currentDirShown == QFileSystemIteratorPrivate::ShowDir)
+        return QString();
+    if (d->m_currentDirShown == QFileSystemIteratorPrivate::ShowDotDir)
+        return QLatin1String("@");
+    if (d->m_currentDirShown == QFileSystemIteratorPrivate::ShowDotDotDir)
+        return QLatin1String("@@");
+#ifdef Q_OS_WIN
+    return QString::fromWCharArray(d->m_entry->cFileName);
+#else
+    return QString::fromLocal8Bit(d->m_entry->d_name);
+#endif
+}
+
+/*!
+    Returns the full file path for the current directory entry. If the current
+    entry is invalid (i.e., isValid() returns false), a null QString is
+    returned.
+
+    \sa fileInfo(), fileName()
+*/
+QString QFileSystemIterator::filePath() const
+{
+    if (d->atEnd())
+        return QString();
+    QByteArray ba = d->m_dirPaths.top();
+    if (d->m_currentDirShown == QFileSystemIteratorPrivate::ShowDotDir)
+        ba += "/.";
+    else if (d->m_currentDirShown == QFileSystemIteratorPrivate::ShowDotDotDir)
+        ba += "/..";
+    else if (d->m_entry) {
+        ba += '/';
+#ifdef Q_OS_WIN
+        ba += QString::fromWCharArray(d->m_entry->cFileName);
+#else
+        ba += d->m_entry->d_name;
+#endif
+    }
+    return QString::fromLocal8Bit(ba);
+}
+
+/*!
+    Returns a QFileInfo for the current directory entry. If the current entry
+    is invalid (i.e., isValid() returns false), a null QFileInfo is returned.
+
+    \sa filePath(), fileName()
+*/
+QFileInfo QFileSystemIterator::fileInfo() const
+{
+    return QFileInfo(filePath());
+}
+
+/*!
+    Returns the base directory of the iterator.
+*/
+QString QFileSystemIterator::path() const
+{
+    return QString::fromLocal8Bit(d->m_dirPaths.top());
+}
+
+QT_END_NAMESPACE