qt-everywhere-src-5.14.1/qtbase/src/corelib/doc/snippets/code/src_corelib_io_qfileinfo.cpp

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//![newstuff]
    QFileInfo fi("c:/temp/foo"); => fi.absoluteFilePath() => "C:/temp/foo"
//![newstuff]

//! [0]
#ifdef Q_OS_UNIX

QFileInfo info1("/home/bob/bin/untabify");
info1.isSymLink();          // returns true
info1.absoluteFilePath();   // returns "/home/bob/bin/untabify"
info1.size();               // returns 56201
info1.symLinkTarget();      // returns "/opt/pretty++/bin/untabify"

QFileInfo info2(info1.symLinkTarget());
info2.isSymLink();          // returns false
info2.absoluteFilePath();   // returns "/opt/pretty++/bin/untabify"
info2.size();               // returns 56201

#endif
//! [0]


//! [1]
#ifdef Q_OS_WIN

QFileInfo info1("C:\\Documents and Settings\\Bob\\untabify.lnk");
info1.isSymLink();          // returns true
info1.absoluteFilePath();   // returns "C:/Documents and Settings/Bob/untabify.lnk"
info1.size();               // returns 743
info1.symLinkTarget();      // returns "C:/Pretty++/untabify"

QFileInfo info2(info1.symLinkTarget());
info2.isSymLink();          // returns false
info2.absoluteFilePath();   // returns "C:/Pretty++/untabify"
info2.size();               // returns 63942

#endif
//! [1]


//! [2]
QString absolute = "/local/bin";
QString relative = "local/bin";
QFileInfo absFile(absolute);
QFileInfo relFile(relative);

QDir::setCurrent(QDir::rootPath());
// absFile and relFile now point to the same file

QDir::setCurrent("/tmp");
// absFile now points to "/local/bin",
// while relFile points to "/tmp/local/bin"
//! [2]


//! [3]
QFileInfo fi("/tmp/archive.tar.gz");
QString name = fi.fileName();                // name = "archive.tar.gz"
//! [3]


//! [4]
QFileInfo fi("/Applications/Safari.app");
QString bundle = fi.bundleName();                // name = "Safari"
//! [4]


//! [5]
QFileInfo fi("/tmp/archive.tar.gz");
QString base = fi.baseName();  // base = "archive"
//! [5]


//! [6]
QFileInfo fi("/tmp/archive.tar.gz");
QString base = fi.completeBaseName();  // base = "archive.tar"
//! [6]


//! [7]
QFileInfo fi("/tmp/archive.tar.gz");
QString ext = fi.completeSuffix();  // ext = "tar.gz"
//! [7]


//! [8]
QFileInfo fi("/tmp/archive.tar.gz");
QString ext = fi.suffix();  // ext = "gz"
//! [8]


//! [9]
QFileInfo info(fileName);
if (info.isSymLink())
    fileName = info.symLinkTarget();
//! [9]


//! [10]
QFileInfo fi("/tmp/archive.tar.gz");
if (fi.permission(QFile::WriteUser | QFile::ReadGroup))
    qWarning("I can change the file; my group can read the file");
if (fi.permission(QFile::WriteGroup | QFile::WriteOther))
    qWarning("The group or others can change the file");
//! [10]