diff options
Diffstat (limited to 'src/corelib/global/qoperatingsystemversion.cpp')
| -rw-r--r-- | src/corelib/global/qoperatingsystemversion.cpp | 83 |
1 files changed, 43 insertions, 40 deletions
diff --git a/src/corelib/global/qoperatingsystemversion.cpp b/src/corelib/global/qoperatingsystemversion.cpp index 8b8f47575d..0cfc70a790 100644 --- a/src/corelib/global/qoperatingsystemversion.cpp +++ b/src/corelib/global/qoperatingsystemversion.cpp @@ -98,6 +98,33 @@ QT_BEGIN_NAMESPACE GetVersionEx that hides the real version number if the application is not manifested for that version of the OS \endtable + + Because QOperatingSystemVersion stores both a version number and an OS type, the OS type + can be taken into account when performing comparisons. For example, on a macOS system running + macOS Sierra (v10.12), the following expression will return \c false even though the + major version number component of the object on the left hand side of the expression (10) is + greater than that of the object on the right (9): + + \code + QOperatingSystemVersion::current() >= QOperatingSystemVersion(QOperatingSystemVersion::IOS, 9) + \endcode + + This allows expressions for multiple operating systems to be joined with a logical OR operator + and still work as expected. For example: + + \code + auto current = QOperatingSystemVersion::current(); + if (current >= QOperatingSystemVersion::OSXYosemite || + current >= QOperatingSystemVersion(QOperatingSystemVersion::IOS, 8)) { + // returns true on macOS >= 10.10 and iOS >= 8.0, but false on macOS < 10.10 and iOS < 8.0 + } + \encode + + A more naive comparison algorithm might incorrectly return true on all versions of macOS, + including Mac OS 9. This behavior is achieved by overloading the comparison operators to return + \c false whenever the OS types of the QOperatingSystemVersion instances being compared do not + match. Be aware that due to this it can be the case \c x >= y and \c x < y are BOTH \c false + for the same instances of \c x and \c y. */ /*! @@ -111,7 +138,7 @@ QT_BEGIN_NAMESPACE \value MacOS The Apple macOS operating system. \value TvOS The Apple tvOS operating system. \value WatchOS The Apple watchOS operating system. - \value Windows The Microsoft Windows operating system (in both Win32 and WinRT environments). + \value Windows The Microsoft Windows operating system. \value Unknown An unknown or unsupported operating system. */ @@ -200,21 +227,6 @@ static inline int compareVersionComponents(int lhs, int rhs) return lhs >= 0 && rhs >= 0 ? lhs - rhs : 0; } -/*! - \fn int QOperatingSystemVersion::compare(const QOperatingSystemVersion &v1, - const QOperatingSystemVersion &v2) - - Compares \a v1 with \a v2 and returns an integer less than, equal to, or - greater than zero, depending on whether \a v1 is less than, equal to, or - greater than \a v2, respectively. - - Comparisons are performed by comparing the version number components of - \a v1 and \a v2. - - \note This function cannot take the OS type into account; you should use - the overloaded comparison operators to compare QOperatingSystemVersions - in a safe manner. -*/ int QOperatingSystemVersion::compare(const QOperatingSystemVersion &v1, const QOperatingSystemVersion &v2) { @@ -227,30 +239,6 @@ int QOperatingSystemVersion::compare(const QOperatingSystemVersion &v1, return compareVersionComponents(v1.m_major, v2.m_major); } -#ifndef QT_BOOTSTRAPPED -/*! - \fn QOperatingSystemVersion QOperatingSystemVersion::fromVersionNumber(const QVersionNumber &version, - QOperatingSystemVersion::OSType os) - - Returns a QOperatingSystemVersion consisting of the OS type \a os and version number \a version. -*/ -QOperatingSystemVersion QOperatingSystemVersion::fromVersionNumber(const QVersionNumber &version, - QOperatingSystemVersion::OSType os) -{ - return QOperatingSystemVersion(os, version.majorVersion(), version.minorVersion(), version.microVersion()); -} - -/*! - \fn QOperatingSystemVersion QOperatingSystemVersion::toVersionNumber() const - - Returns the QOperatingSystemVersion's version number as a QVersionNumber. -*/ -QVersionNumber QOperatingSystemVersion::toVersionNumber() const -{ - return QVersionNumber(m_major, m_minor, m_micro); -} -#endif - /*! \fn int QOperatingSystemVersion::majorVersion() const @@ -340,6 +328,21 @@ QString QOperatingSystemVersion::name() const } /*! + \fn bool QOperatingSystemVersion::isAnyOfType(std::initializer_list<OSType> types) const + + Returns whether the OS type identified by the QOperatingSystemVersion + matches any of the OS types in \a types. +*/ +bool QOperatingSystemVersion::isAnyOfType(std::initializer_list<OSType> types) const +{ + for (const auto &t : qAsConst(types)) { + if (type() == t) + return true; + } + return false; +} + +/*! \variable QOperatingSystemVersion::Windows7 \brief a version corresponding to Windows 7 (version 6.1). \since 5.9 |