Add the QStorageInfo class

Allows to retrieve information about mounted volumes such as label,
total/available size, filesystem type and so on.
Possible use cases are:
- allows to do checks about filesystem before performing actual
  operation (such as available/maximum volume size)
- allows to retrive information about volume that can be shown in file
  dialogs
- allows to retrieve volume for specific path and check if two or more
  paths belong to the same volume or not

[ChangeLog][QtCore] Added QStorageInfo class to retrive information
about mounted volumes and drives

Change-Id: Ibf9c2e6b53ef39c5605894a4422acdbbca4030c4
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qstorageinfo.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qstorageinfo.cpp
new file mode 100644
index 0000000000..e5e8c1e86a
--- /dev/null
+++ b/src/corelib/doc/snippets/code/src_corelib_io_qstorageinfo.cpp
@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Ivan Komissarov
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+    QStorageInfo storage(qApp->applicationDirPath());
+    if (storage.isValid() && storage.isReady()) {
+        // ...
+    }
+//! [0]
+
+//! [1]
+    foreach (const QStorageInfo &storage, QStorageInfo::mountedVolumes()) {
+        if (storage.isValid() && storage.isReady()) {
+            if (!storage.isReadOnly()) {
+                // ...
+            }
+        }
+    }
+//! [1]
+
+//! [2]
+    QStorageInfo storage = QStorageInfo::root();
+
+    qDebug() << storage.rootPath();
+    if (storage.isReadOnly())
+        qDebug() << "isReadOnly:" << storage.isReadOnly();
+
+    qDebug() << "name:" << storage.name();
+    qDebug() << "fileSystemType:" << storage.fileSystemType();
+    qDebug() << "size:" << storage.bytesTotal()/1000/1000 << "MB";
+    qDebug() << "availableSize:" << storage.bytesAvailable()/1000/1000 << "MB";
+//! [2]