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qstorageinfo.cpp

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3** Copyright (C) 2014 Ivan Komissarov <ABBAPOH@gmail.com>-
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39-
40#include "qstorageinfo.h"-
41#include "qstorageinfo_p.h"-
42-
43QT_BEGIN_NAMESPACE-
44-
45/*!-
46 \class QStorageInfo-
47 \inmodule QtCore-
48 \since 5.4-
49 \brief Provides information about currently mounted storage and drives.-
50-
51 \ingroup io-
52 \ingroup shared-
53-
54 Allows retrieving information about the volume's space, its mount point,-
55 label, and filesystem name.-
56-
57 You can create an instance of QStorageInfo by passing the path to the-
58 volume's mount point as a constructor parameter, or you can set it using-
59 the setPath() method. The static mountedVolumes() method can be used to get the-
60 list of all mounted filesystems.-
61-
62 QStorageInfo always caches the retrieved information, but you can call-
63 refresh() to invalidate the cache.-
64-
65 The following example retrieves the most common information about the root-
66 volume of the system, and prints information about it.-
67-
68 \snippet code/src_corelib_io_qstorageinfo.cpp 2-
69*/-
70-
71/*!-
72 Constructs an empty QStorageInfo object.-
73-
74 Objects created with the default constructor will be invalid and therefore-
75 not ready for use.-
76-
77 \sa setPath(), isReady(), isValid()-
78*/-
79QStorageInfo::QStorageInfo()-
80 : d(new QStorageInfoPrivate)-
81{-
82}
executed 4 times by 1 test: end of block
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83-
84/*!-
85 Constructs a new QStorageInfo object that gives information about the volume-
86 mounted at \a path.-
87-
88 If you pass a directory or file, the QStorageInfo object will refer to the-
89 volume where this directory or file is located.-
90 You can check if the created object is correct using the isValid() method.-
91-
92 The following example shows how to get the volume on which the application is-
93 located. It is recommended to always check that the volume is ready and valid.-
94-
95 \snippet code/src_corelib_io_qstorageinfo.cpp 0-
96-
97 \sa setPath()-
98*/-
99QStorageInfo::QStorageInfo(const QString &path)-
100 : d(new QStorageInfoPrivate)-
101{-
102 setPath(path);-
103}
executed 24 times by 1 test: end of block
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24
104-
105/*!-
106 Constructs a new QStorageInfo object that gives information about the volume-
107 containing the \a dir folder.-
108*/-
109QStorageInfo::QStorageInfo(const QDir &dir)-
110 : d(new QStorageInfoPrivate)-
111{-
112 setPath(dir.absolutePath());-
113}
never executed: end of block
0
114-
115/*!-
116 Constructs a new QStorageInfo object that is a copy of the \a other QStorageInfo object.-
117*/-
118QStorageInfo::QStorageInfo(const QStorageInfo &other)-
119 : d(other.d)-
120{-
121}
executed 21 times by 1 test: end of block
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21
122-
123/*!-
124 Destroys the QStorageInfo object and frees its resources.-
125*/-
126QStorageInfo::~QStorageInfo()-
127{-
128}-
129-
130/*!-
131 Makes a copy of the QStorageInfo object \a other and assigns it to this QStorageInfo object.-
132*/-
133QStorageInfo &QStorageInfo::operator=(const QStorageInfo &other)-
134{-
135 d = other.d;-
136 return *this;
never executed: return *this;
0
137}-
138-
139/*!-
140 \fn QStorageInfo &QStorageInfo::operator=(QStorageInfo &&other)-
141-
142 Assigns \a other to this QStorageInfo instance.-
143*/-
144-
145/*!-
146 \fn void QStorageInfo::swap(QStorageInfo &other)-
147-
148 Swaps this volume info with \a other. This function is very fast and-
149 never fails.-
150*/-
151-
152/*!-
153 Sets this QStorageInfo object to the filesystem mounted where \a path is located.-
154-
155 \a path can either be a root path of the filesystem, a directory, or a file-
156 within that filesystem.-
157-
158 \sa rootPath()-
159*/-
160void QStorageInfo::setPath(const QString &path)-
161{-
162 if (d->rootPath == path)
d->rootPath == pathDescription
TRUEnever evaluated
FALSEevaluated 24 times by 1 test
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163 return;
never executed: return;
0
164 d.detach();-
165 d->rootPath = path;-
166 d->doStat();-
167}
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168-
169/*!-
170 Returns the mount point of the filesystem this QStorageInfo object-
171 represents.-
172-
173 On Windows, it returns the volume letter in case the volume is not mounted to-
174 a directory.-
175-
176 Note that the value returned by rootPath() is the real mount point of a-
177 volume, and may not be equal to the value passed to the constructor or setPath()-
178 method. For example, if you have only the root volume in the system, and-
179 pass '/directory' to setPath(), then this method will return '/'.-
180-
181 \sa setPath(), device()-
182*/-
183QString QStorageInfo::rootPath() const-
184{-
185 return d->rootPath;
executed 8 times by 1 test: return d->rootPath;
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186}-
187-
188/*!-
189 Returns the size (in bytes) available for the current user. It returns-
190 the total size available if the user is the root user or a system administrator.-
191-
192 This size can be less than or equal to the free size returned by-
193 bytesFree() function.-
194-
195 Returns -1 if QStorageInfo object is not valid.-
196-
197 \sa bytesTotal(), bytesFree()-
198*/-
199qint64 QStorageInfo::bytesAvailable() const-
200{-
201 return d->bytesAvailable;
executed 3 times by 1 test: return d->bytesAvailable;
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202}-
203-
204/*!-
205 Returns the number of free bytes in a volume. Note that if there are-
206 quotas on the filesystem, this value can be larger than the value-
207 returned by bytesAvailable().-
208-
209 Returns -1 if QStorageInfo object is not valid.-
210-
211 \sa bytesTotal(), bytesAvailable()-
212*/-
213qint64 QStorageInfo::bytesFree() const-
214{-
215 return d->bytesFree;
executed 15 times by 1 test: return d->bytesFree;
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216}-
217-
218/*!-
219 Returns the total volume size in bytes.-
220-
221 Returns -1 if QStorageInfo object is not valid.-
222-
223 \sa bytesFree(), bytesAvailable()-
224*/-
225qint64 QStorageInfo::bytesTotal() const-
226{-
227 return d->bytesTotal;
executed 24 times by 1 test: return d->bytesTotal;
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228}-
229-
230/*!-
231 \since 5.6-
232 Returns the optimal transfer block size for this filesystem.-
233-
234 Returns -1 if QStorageInfo could not determine the size or if the QStorageInfo-
235 object is not valid.-
236 */-
237int QStorageInfo::blockSize() const-
238{-
239 return d->blockSize;
executed 5 times by 1 test: return d->blockSize;
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240}-
241-
242/*!-
243 Returns the type name of the filesystem.-
244-
245 This is a platform-dependent function, and filesystem names can vary-
246 between different operating systems. For example, on Windows filesystems-
247 they can be named \c NTFS, and on Linux they can be named \c ntfs-3g or \c fuseblk.-
248-
249 \sa name()-
250*/-
251QByteArray QStorageInfo::fileSystemType() const-
252{-
253 return d->fileSystemType;
executed 15 times by 1 test: return d->fileSystemType;
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254}-
255-
256/*!-
257 Returns the device for this volume.-
258-
259 For example, on Unix filesystems (including \macos), this returns the-
260 devpath like \c /dev/sda0 for local storages. On Windows, it returns the UNC-
261 path starting with \c \\\\?\\ for local storages (in other words, the volume GUID).-
262-
263 \sa rootPath()-
264*/-
265QByteArray QStorageInfo::device() const-
266{-
267 return d->device;
executed 48 times by 1 test: return d->device;
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268}-
269-
270/*!-
271 Returns the human-readable name of a filesystem, usually called \c label.-
272-
273 Not all filesystems support this feature. In this case, the value returned by-
274 this method could be empty. An empty string is returned if the file system-
275 does not support labels, or if no label is set.-
276-
277 On Linux, retrieving the volume's label requires \c udev to be present in the-
278 system.-
279-
280 \sa fileSystemType()-
281*/-
282QString QStorageInfo::name() const-
283{-
284 return d->name;
executed 5 times by 1 test: return d->name;
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285}-
286-
287/*!-
288 Returns the volume's name, if available, or the root path if not.-
289*/-
290QString QStorageInfo::displayName() const-
291{-
292 if (!d->name.isEmpty())
!d->name.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
293 return d->name;
never executed: return d->name;
0
294 return d->rootPath;
never executed: return d->rootPath;
0
295}-
296-
297/*!-
298 \fn bool QStorageInfo::isRoot() const-
299-
300 Returns true if this QStorageInfo represents the system root volume; false-
301 otherwise.-
302-
303 On Unix filesystems, the root volume is a volume mounted on \c /. On Windows,-
304 the root volume is the volume where the OS is installed.-
305-
306 \sa root()-
307*/-
308-
309/*!-
310 Returns true if the current filesystem is protected from writing; false-
311 otherwise.-
312*/-
313bool QStorageInfo::isReadOnly() const-
314{-
315 return d->readOnly;
executed 5 times by 1 test: return d->readOnly;
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316}-
317-
318/*!-
319 Returns true if the current filesystem is ready to work; false otherwise. For-
320 example, false is returned if the CD volume is not inserted.-
321-
322 Note that fileSystemType(), name(), bytesTotal(), bytesFree(), and-
323 bytesAvailable() will return invalid data until the volume is ready.-
324-
325 \sa isValid()-
326*/-
327bool QStorageInfo::isReady() const-
328{-
329 return d->ready;
executed 7 times by 1 test: return d->ready;
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330}-
331-
332/*!-
333 Returns true if the QStorageInfo specified by rootPath exists and is mounted-
334 correctly.-
335-
336 \sa isReady()-
337*/-
338bool QStorageInfo::isValid() const-
339{-
340 return d->valid;
executed 7 times by 1 test: return d->valid;
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341}-
342-
343/*!-
344 Resets QStorageInfo's internal cache.-
345-
346 QStorageInfo caches information about storage to speed up performance.-
347 QStorageInfo retrieves information during object construction and/or when calling-
348 the setPath() method. You have to manually reset the cache by calling this-
349 function to update storage information.-
350*/-
351void QStorageInfo::refresh()-
352{-
353 d.detach();-
354 d->doStat();-
355}
executed 1 time by 1 test: end of block
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356-
357/*!-
358 Returns the list of QStorageInfo objects that corresponds to the list of currently-
359 mounted filesystems.-
360-
361 On Windows, this returns the drives visible in the \gui{My Computer} folder. On Unix-
362 operating systems, it returns the list of all mounted filesystems (except for-
363 pseudo filesystems).-
364-
365 Returns all currently mounted filesystems by default.-
366-
367 The example shows how to retrieve all available filesystems, skipping read-only ones.-
368-
369 \snippet code/src_corelib_io_qstorageinfo.cpp 1-
370-
371 \sa root()-
372*/-
373QList<QStorageInfo> QStorageInfo::mountedVolumes()-
374{-
375 return QStorageInfoPrivate::mountedVolumes();
executed 2 times by 1 test: return QStorageInfoPrivate::mountedVolumes();
Executed by:
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376}-
377-
378Q_GLOBAL_STATIC_WITH_ARGS(QStorageInfo, getRoot, (QStorageInfoPrivate::root()))
executed 1 time by 1 test: end of block
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executed 1 time by 1 test: guard.store(QtGlobalStatic::Destroyed);
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executed 10 times by 1 test: return &holder.value;
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guard.load() =...c::InitializedDescription
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FALSEnever evaluated
0-10
379-
380/*!-
381 Returns a QStorageInfo object that represents the system root volume.-
382-
383 On Unix systems this call returns the root ('/') volume; in Windows the volume where-
384 the operating system is installed.-
385-
386 \sa isRoot()-
387*/-
388QStorageInfo QStorageInfo::root()-
389{-
390 return *getRoot();
executed 10 times by 1 test: return *getRoot();
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391}-
392-
393/*!-
394 \fn inline bool operator==(const QStorageInfo &first, const QStorageInfo &second)-
395-
396 \relates QStorageInfo-
397-
398 Returns true if the \a first QStorageInfo object refers to the same drive or volume-
399 as the \a second; otherwise it returns false.-
400-
401 Note that the result of comparing two invalid QStorageInfo objects is always-
402 positive.-
403*/-
404-
405/*!-
406 \fn inline bool operator!=(const QStorageInfo &first, const QStorageInfo &second)-
407-
408 \relates QStorageInfo-
409-
410 Returns true if the \a first QStorageInfo object refers to a different drive or-
411 volume than the \a second; otherwise returns false.-
412*/-
413-
414QT_END_NAMESPACE-
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