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diff --git a/src/corelib/global/qglobal.cpp b/src/corelib/global/qglobal.cpp new file mode 100644 index 0000000..b9c2bee --- /dev/null +++ b/src/corelib/global/qglobal.cpp @@ -0,0 +1,2964 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtCore module 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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qplatformdefs.h" +#include "qstring.h" +#include "qvector.h" +#include "qlist.h" +#include "qthreadstorage.h" + +#ifndef QT_NO_QOBJECT +#include <private/qthread_p.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <limits.h> +#include <stdarg.h> +#include <string.h> + +#if !defined(Q_OS_WINCE) +# include <errno.h> +# if defined(Q_CC_MSVC) +# include <crtdbg.h> +# endif +#endif + +#ifdef Q_CC_MWERKS +#include <CoreServices/CoreServices.h> +#endif + +QT_BEGIN_NAMESPACE + + +/*! + \class QFlag + \brief The QFlag class is a helper data type for QFlags. + + It is equivalent to a plain \c int, except with respect to + function overloading and type conversions. You should never need + to use this class in your applications. + + \sa QFlags +*/ + +/*! + \fn QFlag::QFlag(int value) + + Constructs a QFlag object that stores the given \a value. +*/ + +/*! + \fn QFlag::operator int() const + + Returns the value stored by the QFlag object. +*/ + +/*! + \class QFlags + \brief The QFlags class provides a type-safe way of storing + OR-combinations of enum values. + + \mainclass + \ingroup tools + + The QFlags<Enum> class is a template class, where Enum is an enum + type. QFlags is used throughout Qt for storing combinations of + enum values. + + The traditional C++ approach for storing OR-combinations of enum + values is to use an \c int or \c uint variable. The inconvenience + with this approach is that there's no type checking at all; any + enum value can be OR'd with any other enum value and passed on to + a function that takes an \c int or \c uint. + + Qt uses QFlags to provide type safety. For example, the + Qt::Alignment type is simply a typedef for + QFlags<Qt::AlignmentFlag>. QLabel::setAlignment() takes a + Qt::Alignment parameter, which means that any combination of + Qt::AlignmentFlag values,or 0, is legal: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 0 + + If you try to pass a value from another enum or just a plain + integer other than 0, the compiler will report an error. If you + need to cast integer values to flags in a untyped fashion, you can + use the explicit QFlags constructor as cast operator. + + If you want to use QFlags for your own enum types, use + the Q_DECLARE_FLAGS() and Q_DECLARE_OPERATORS_FOR_FLAGS(). + For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 1 + + You can then use the \c MyClass::Options type to store + combinations of \c MyClass::Option values. + + \section1 Flags and the Meta-Object System + + The Q_DECLARE_FLAGS() macro does not expose the flags to the meta-object + system, so they cannot be used by Qt Script or edited in Qt Designer. + To make the flags available for these purposes, the Q_FLAGS() macro must + be used: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp meta-object flags + + \section1 Naming Convention + + A sensible naming convention for enum types and associated QFlags + types is to give a singular name to the enum type (e.g., \c + Option) and a plural name to the QFlags type (e.g., \c Options). + When a singular name is desired for the QFlags type (e.g., \c + Alignment), you can use \c Flag as the suffix for the enum type + (e.g., \c AlignmentFlag). + + \sa QFlag +*/ + +/*! + \typedef QFlags::enum_type + + Typedef for the Enum template type. +*/ + +/*! + \fn QFlags::QFlags(const QFlags &other) + + Constructs a copy of \a other. +*/ + +/*! + \fn QFlags::QFlags(Enum flag) + + Constructs a QFlags object storing the given \a flag. +*/ + +/*! + \fn QFlags::QFlags(Zero zero) + + Constructs a QFlags object with no flags set. \a zero must be a + literal 0 value. +*/ + +/*! + \fn QFlags::QFlags(QFlag value) + + Constructs a QFlags object initialized with the given integer \a + value. + + The QFlag type is a helper type. By using it here instead of \c + int, we effectively ensure that arbitrary enum values cannot be + cast to a QFlags, whereas untyped enum values (i.e., \c int + values) can. +*/ + +/*! + \fn QFlags &QFlags::operator=(const QFlags &other) + + Assigns \a other to this object and returns a reference to this + object. +*/ + +/*! + \fn QFlags &QFlags::operator&=(int mask) + + Performs a bitwise AND operation with \a mask and stores the + result in this QFlags object. Returns a reference to this object. + + \sa operator&(), operator|=(), operator^=() +*/ + +/*! + \fn QFlags &QFlags::operator&=(uint mask) + + \overload +*/ + +/*! + \fn QFlags &QFlags::operator|=(QFlags other) + + Performs a bitwise OR operation with \a other and stores the + result in this QFlags object. Returns a reference to this object. + + \sa operator|(), operator&=(), operator^=() +*/ + +/*! + \fn QFlags &QFlags::operator|=(Enum other) + + \overload +*/ + +/*! + \fn QFlags &QFlags::operator^=(QFlags other) + + Performs a bitwise XOR operation with \a other and stores the + result in this QFlags object. Returns a reference to this object. + + \sa operator^(), operator&=(), operator|=() +*/ + +/*! + \fn QFlags &QFlags::operator^=(Enum other) + + \overload +*/ + +/*! + \fn QFlags::operator int() const + + Returns the value stored in the QFlags object as an integer. +*/ + +/*! + \fn QFlags QFlags::operator|(QFlags other) const + + Returns a QFlags object containing the result of the bitwise OR + operation on this object and \a other. + + \sa operator|=(), operator^(), operator&(), operator~() +*/ + +/*! + \fn QFlags QFlags::operator|(Enum other) const + + \overload +*/ + +/*! + \fn QFlags QFlags::operator^(QFlags other) const + + Returns a QFlags object containing the result of the bitwise XOR + operation on this object and \a other. + + \sa operator^=(), operator&(), operator|(), operator~() +*/ + +/*! + \fn QFlags QFlags::operator^(Enum other) const + + \overload +*/ + +/*! + \fn QFlags QFlags::operator&(int mask) const + + Returns a QFlags object containing the result of the bitwise AND + operation on this object and \a mask. + + \sa operator&=(), operator|(), operator^(), operator~() +*/ + +/*! + \fn QFlags QFlags::operator&(uint mask) const + + \overload +*/ + +/*! + \fn QFlags QFlags::operator&(Enum mask) const + + \overload +*/ + +/*! + \fn QFlags QFlags::operator~() const + + Returns a QFlags object that contains the bitwise negation of + this object. + + \sa operator&(), operator|(), operator^() +*/ + +/*! + \fn bool QFlags::operator!() const + + Returns true if no flag is set (i.e., if the value stored by the + QFlags object is 0); otherwise returns false. +*/ + +/*! + \fn bool QFlags::testFlag(Enum flag) const + \since 4.2 + + Returns true if the \a flag is set, otherwise false. +*/ + +/*! + \macro Q_DISABLE_COPY(Class) + \relates QObject + + Disables the use of copy constructors and assignment operators + for the given \a Class. + + Instances of subclasses of QObject should not be thought of as + values that can be copied or assigned, but as unique identities. + This means that when you create your own subclass of QObject + (director or indirect), you should \e not give it a copy constructor + or an assignment operator. However, it may not enough to simply + omit them from your class, because, if you mistakenly write some code + that requires a copy constructor or an assignment operator (it's easy + to do), your compiler will thoughtfully create it for you. You must + do more. + + The curious user will have seen that the Qt classes derived + from QObject typically include this macro in a private section: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 43 + + It declares a copy constructor and an assignment operator in the + private section, so that if you use them by mistake, the compiler + will report an error. + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 44 + + But even this might not catch absolutely every case. You might be + tempted to do something like this: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 45 + + First of all, don't do that. Most compilers will generate code that + uses the copy constructor, so the privacy violation error will be + reported, but your C++ compiler is not required to generate code for + this statement in a specific way. It could generate code using + \e{neither} the copy constructor \e{nor} the assignment operator we + made private. In that case, no error would be reported, but your + application would probably crash when you called a member function + of \c{w}. +*/ + +/*! + \macro Q_DECLARE_FLAGS(Flags, Enum) + \relates QFlags + + The Q_DECLARE_FLAGS() macro expands to + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 2 + + \a Enum is the name of an existing enum type, whereas \a Flags is + the name of the QFlags<\e{Enum}> typedef. + + See the QFlags documentation for details. + + \sa Q_DECLARE_OPERATORS_FOR_FLAGS() +*/ + +/*! + \macro Q_DECLARE_OPERATORS_FOR_FLAGS(Flags) + \relates QFlags + + The Q_DECLARE_OPERATORS_FOR_FLAGS() macro declares global \c + operator|() functions for \a Flags, which is of type QFlags<T>. + + See the QFlags documentation for details. + + \sa Q_DECLARE_FLAGS() +*/ + +/*! + \headerfile <QtGlobal> + \title Global Qt Declarations + \ingroup architecture + + \brief The <QtGlobal> header provides basic declarations and + is included by all other Qt headers. + + The declarations include \l {types}, \l functions and + \l macros. + + The type definitions are partly convenience definitions for basic + types (some of which guarantee certain bit-sizes on all platforms + supported by Qt), partly types related to Qt message handling. The + functions are related to generating messages, Qt version handling + and comparing and adjusting object values. And finally, some of + the declared macros enable programmers to add compiler or platform + specific code to their applications, while others are convenience + macros for larger operations. + + \section1 Types + + The header file declares several type definitions that guarantee a + specified bit-size on all platforms supported by Qt for various + basic types, for example \l qint8 which is a signed char + guaranteed to be 8-bit on all platforms supported by Qt. The + header file also declares the \l qlonglong type definition for \c + {long long int } (\c __int64 on Windows). + + Several convenience type definitions are declared: \l qreal for \c + double, \l uchar for \c unsigned char, \l uint for \c unsigned + int, \l ulong for \c unsigned long and \l ushort for \c unsigned + short. + + Finally, the QtMsgType definition identifies the various messages + that can be generated and sent to a Qt message handler; + QtMsgHandler is a type definition for a pointer to a function with + the signature \c {void myMsgHandler(QtMsgType, const char *)}. + + \section1 Functions + + The <QtGlobal> header file contains several functions comparing + and adjusting an object's value. These functions take a template + type as argument: You can retrieve the absolute value of an object + using the qAbs() function, and you can bound a given object's + value by given minimum and maximum values using the qBound() + function. You can retrieve the minimum and maximum of two given + objects using qMin() and qMax() respectively. All these functions + return a corresponding template type; the template types can be + replaced by any other type. For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 3 + + <QtGlobal> also contains functions that generate messages from the + given string argument: qCritical(), qDebug(), qFatal() and + qWarning(). These functions call the message handler with the + given message. For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 4 + + The remaining functions are qRound() and qRound64(), which both + accept a \l qreal value as their argument returning the value + rounded up to the nearest integer and 64-bit integer respectively, + the qInstallMsgHandler() function which installs the given + QtMsgHandler, and the qVersion() function which returns the + version number of Qt at run-time as a string. + + \section1 Macros + + The <QtGlobal> header file provides a range of macros (Q_CC_*) + that are defined if the application is compiled using the + specified platforms. For example, the Q_CC_SUN macro is defined if + the application is compiled using Forte Developer, or Sun Studio + C++. The header file also declares a range of macros (Q_OS_*) + that are defined for the specified platforms. For example, + Q_OS_X11 which is defined for the X Window System. + + The purpose of these macros is to enable programmers to add + compiler or platform specific code to their application. + + The remaining macros are convenience macros for larger operations: + The QT_TRANSLATE_NOOP() and QT_TR_NOOP() macros provide the + possibility of marking text for dynamic translation, + i.e. translation without changing the stored source text. The + Q_ASSERT() and Q_ASSERT_X() enables warning messages of various + level of refinement. The Q_FOREACH() and foreach() macros + implement Qt's foreach loop. + + The Q_INT64_C() and Q_UINT64_C() macros wrap signed and unsigned + 64-bit integer literals in a platform-independent way. The + Q_CHECK_PTR() macro prints a warning containing the source code's + file name and line number, saying that the program ran out of + memory, if the pointer is 0. The qPrintable() macro represent an + easy way of printing text. + + Finally, the QT_POINTER_SIZE macro expands to the size of a + pointer in bytes, and the QT_VERSION and QT_VERSION_STR macros + expand to a numeric value or a string, respectively, specifying + Qt's version number, i.e the version the application is compiled + against. + + \sa <QtAlgorithms>, QSysInfo +*/ + +/*! + \typedef qreal + \relates <QtGlobal> + + Typedef for \c double on all platforms except for those using CPUs with + ARM architectures. + On ARM-based platforms, \c qreal is a typedef for \c float for performance + reasons. +*/ + +/*! \typedef uchar + \relates <QtGlobal> + + Convenience typedef for \c{unsigned char}. +*/ + +/*! + \fn qt_set_sequence_auto_mnemonic(bool on) + \relates <QtGlobal> + + Enables automatic mnemonics on Mac if \a on is true; otherwise + this feature is disabled. + + Note that this function is only available on Mac where mnemonics + are disabled by default. + + To access to this function, use an extern declaration: + extern void qt_set_sequence_auto_mnemonic(bool b); + + \sa {QShortcut#mnemonic}{QShortcut} +*/ + +/*! \typedef ushort + \relates <QtGlobal> + + Convenience typedef for \c{unsigned short}. +*/ + +/*! \typedef uint + \relates <QtGlobal> + + Convenience typedef for \c{unsigned int}. +*/ + +/*! \typedef ulong + \relates <QtGlobal> + + Convenience typedef for \c{unsigned long}. +*/ + +/*! \typedef qint8 + \relates <QtGlobal> + + Typedef for \c{signed char}. This type is guaranteed to be 8-bit + on all platforms supported by Qt. +*/ + +/*! + \typedef quint8 + \relates <QtGlobal> + + Typedef for \c{unsigned char}. This type is guaranteed to + be 8-bit on all platforms supported by Qt. +*/ + +/*! \typedef qint16 + \relates <QtGlobal> + + Typedef for \c{signed short}. This type is guaranteed to be + 16-bit on all platforms supported by Qt. +*/ + +/*! + \typedef quint16 + \relates <QtGlobal> + + Typedef for \c{unsigned short}. This type is guaranteed to + be 16-bit on all platforms supported by Qt. +*/ + +/*! \typedef qint32 + \relates <QtGlobal> + + Typedef for \c{signed int}. This type is guaranteed to be 32-bit + on all platforms supported by Qt. +*/ + +/*! + \typedef quint32 + \relates <QtGlobal> + + Typedef for \c{unsigned int}. This type is guaranteed to + be 32-bit on all platforms supported by Qt. +*/ + +/*! \typedef qint64 + \relates <QtGlobal> + + Typedef for \c{long long int} (\c __int64 on Windows). This type + is guaranteed to be 64-bit on all platforms supported by Qt. + + Literals of this type can be created using the Q_INT64_C() macro: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 5 + + \sa Q_INT64_C(), quint64, qlonglong +*/ + +/*! + \typedef quint64 + \relates <QtGlobal> + + Typedef for \c{unsigned long long int} (\c{unsigned __int64} on + Windows). This type is guaranteed to be 64-bit on all platforms + supported by Qt. + + Literals of this type can be created using the Q_UINT64_C() + macro: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 6 + + \sa Q_UINT64_C(), qint64, qulonglong +*/ + +/*! + \typedef quintptr + \relates <QtGlobal> + + Integral type for representing a pointers (useful for hashing, + etc.). + + Typedef for either quint32 or quint64. This type is guaranteed to + be the same size as a pointer on all platforms supported by Qt. On + a system with 32-bit pointers, quintptr is a typedef for quint32; + on a system with 64-bit pointers, quintptr is a typedef for + quint64. + + Note that quintptr is unsigned. Use qptrdiff for signed values. + + \sa qptrdiff, quint32, quint64 +*/ + +/*! + \typedef qptrdiff + \relates <QtGlobal> + + Integral type for representing pointer differences. + + Typedef for either qint32 or qint64. This type is guaranteed to be + the same size as a pointer on all platforms supported by Qt. On a + system with 32-bit pointers, quintptr is a typedef for quint32; on + a system with 64-bit pointers, quintptr is a typedef for quint64. + + Note that qptrdiff is signed. Use quintptr for unsigned values. + + \sa quintptr, qint32, qint64 +*/ + +/*! + \typedef QtMsgHandler + \relates <QtGlobal> + + This is a typedef for a pointer to a function with the following + signature: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 7 + + \sa QtMsgType, qInstallMsgHandler() +*/ + +/*! + \enum QtMsgType + \relates <QtGlobal> + + This enum describes the messages that can be sent to a message + handler (QtMsgHandler). You can use the enum to identify and + associate the various message types with the appropriate + actions. + + \value QtDebugMsg + A message generated by the qDebug() function. + \value QtWarningMsg + A message generated by the qWarning() function. + \value QtCriticalMsg + A message generated by the qCritical() function. + \value QtFatalMsg + A message generated by the qFatal() function. + \value QtSystemMsg + + + \sa QtMsgHandler, qInstallMsgHandler() +*/ + +/*! \macro qint64 Q_INT64_C(literal) + \relates <QtGlobal> + + Wraps the signed 64-bit integer \a literal in a + platform-independent way. For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 8 + + \sa qint64, Q_UINT64_C() +*/ + +/*! \macro quint64 Q_UINT64_C(literal) + \relates <QtGlobal> + + Wraps the unsigned 64-bit integer \a literal in a + platform-independent way. For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 9 + + \sa quint64, Q_INT64_C() +*/ + +/*! \typedef qlonglong + \relates <QtGlobal> + + Typedef for \c{long long int} (\c __int64 on Windows). This is + the same as \l qint64. + + \sa qulonglong, qint64 +*/ + +/*! + \typedef qulonglong + \relates <QtGlobal> + + Typedef for \c{unsigned long long int} (\c{unsigned __int64} on + Windows). This is the same as \l quint64. + + \sa quint64, qlonglong +*/ + +/*! \fn const T &qAbs(const T &value) + \relates <QtGlobal> + + Returns the absolute value of \a value. For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 10 +*/ + +/*! \fn int qRound(qreal value) + \relates <QtGlobal> + + Rounds \a value to the nearest integer. For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 11 +*/ + +/*! \fn qint64 qRound64(qreal value) + \relates <QtGlobal> + + Rounds \a value to the nearest 64-bit integer. For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 12 +*/ + +/*! \fn const T &qMin(const T &value1, const T &value2) + \relates <QtGlobal> + + Returns the minimum of \a value1 and \a value2. For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 13 + + \sa qMax(), qBound() +*/ + +/*! \fn const T &qMax(const T &value1, const T &value2) + \relates <QtGlobal> + + Returns the maximum of \a value1 and \a value2. For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 14 + + \sa qMin(), qBound() +*/ + +/*! \fn const T &qBound(const T &min, const T &value, const T &max) + \relates <QtGlobal> + + Returns \a value bounded by \a min and \a max. This is equivalent + to qMax(\a min, qMin(\a value, \a max)). For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 15 + + \sa qMin(), qMax() +*/ + +/*! + \typedef Q_INT8 + \relates <QtGlobal> + \compat + + Use \l qint8 instead. +*/ + +/*! + \typedef Q_UINT8 + \relates <QtGlobal> + \compat + + Use \l quint8 instead. +*/ + +/*! + \typedef Q_INT16 + \relates <QtGlobal> + \compat + + Use \l qint16 instead. +*/ + +/*! + \typedef Q_UINT16 + \relates <QtGlobal> + \compat + + Use \l quint16 instead. +*/ + +/*! + \typedef Q_INT32 + \relates <QtGlobal> + \compat + + Use \l qint32 instead. +*/ + +/*! + \typedef Q_UINT32 + \relates <QtGlobal> + \compat + + Use \l quint32 instead. +*/ + +/*! + \typedef Q_INT64 + \relates <QtGlobal> + \compat + + Use \l qint64 instead. +*/ + +/*! + \typedef Q_UINT64 + \relates <QtGlobal> + \compat + + Use \l quint64 instead. +*/ + +/*! + \typedef Q_LLONG + \relates <QtGlobal> + \compat + + Use \l qint64 instead. +*/ + +/*! + \typedef Q_ULLONG + \relates <QtGlobal> + \compat + + Use \l quint64 instead. +*/ + +/*! + \typedef Q_LONG + \relates <QtGlobal> + \compat + + Use \c{void *} instead. +*/ + +/*! + \typedef Q_ULONG + \relates <QtGlobal> + \compat + + Use \c{void *} instead. +*/ + +/*! \fn bool qSysInfo(int *wordSize, bool *bigEndian) + \relates <QtGlobal> + + Use QSysInfo::WordSize and QSysInfo::ByteOrder instead. +*/ + +/*! + \fn bool qt_winUnicode() + \relates <QtGlobal> + + Use QSysInfo::WindowsVersion and QSysInfo::WV_DOS_based instead. + + \sa QSysInfo +*/ + +/*! + \fn int qWinVersion() + \relates <QtGlobal> + + Use QSysInfo::WindowsVersion instead. + + \sa QSysInfo +*/ + +/*! + \fn int qMacVersion() + \relates <QtGlobal> + + Use QSysInfo::MacintoshVersion instead. + + \sa QSysInfo +*/ + +/*! + \macro QT_VERSION + \relates <QtGlobal> + + This macro expands a numeric value of the form 0xMMNNPP (MM = + major, NN = minor, PP = patch) that specifies Qt's version + number. For example, if you compile your application against Qt + 4.1.2, the QT_VERSION macro will expand to 0x040102. + + You can use QT_VERSION to use the latest Qt features where + available. For example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 16 + + \sa QT_VERSION_STR, qVersion() +*/ + +/*! + \macro QT_VERSION_STR + \relates <QtGlobal> + + This macro expands to a string that specifies Qt's version number + (for example, "4.1.2"). This is the version against which the + application is compiled. + + \sa qVersion(), QT_VERSION +*/ + +/*! + \relates <QtGlobal> + + Returns the version number of Qt at run-time as a string (for + example, "4.1.2"). This may be a different version than the + version the application was compiled against. + + \sa QT_VERSION_STR +*/ + +const char *qVersion() +{ + return QT_VERSION_STR; +} + +bool qSharedBuild() +{ +#ifdef QT_SHARED + return true; +#else + return false; +#endif +} + +/***************************************************************************** + System detection routines + *****************************************************************************/ + +/*! + \class QSysInfo + \brief The QSysInfo class provides information about the system. + + \list + \o \l WordSize specifies the size of a pointer for the platform + on which the application is compiled. + \o \l ByteOrder specifies whether the platform is big-endian or + little-endian. + \o \l WindowsVersion specifies the version of the Windows operating + system on which the application is run (Windows only) + \o \l MacintoshVersion specifies the version of the Macintosh + operating system on which the application is run (Mac only). + \endlist + + Some constants are defined only on certain platforms. You can use + the preprocessor symbols Q_WS_WIN and Q_WS_MAC to test that + the application is compiled under Windows or Mac. + + \sa QLibraryInfo +*/ + +/*! + \enum QSysInfo::Sizes + + This enum provides platform-specific information about the sizes of data + structures used by the underlying architecture. + + \value WordSize The size in bits of a pointer for the platform on which + the application is compiled (32 or 64). +*/ + +/*! + \variable QSysInfo::WindowsVersion + \brief the version of the Windows operating system on which the + application is run (Windows only) +*/ + +/*! + \fn QSysInfo::WindowsVersion QSysInfo::windowsVersion() + \since 4.4 + + Returns the version of the Windows operating system on which the + application is run (Windows only). +*/ + +/*! + \variable QSysInfo::MacintoshVersion + \brief the version of the Macintosh operating system on which + the application is run (Mac only). +*/ + +/*! + \enum QSysInfo::Endian + + \value BigEndian Big-endian byte order (also called Network byte order) + \value LittleEndian Little-endian byte order + \value ByteOrder Equals BigEndian or LittleEndian, depending on + the platform's byte order. +*/ + +/*! + \enum QSysInfo::WinVersion + + This enum provides symbolic names for the various versions of the + Windows operating system. On Windows, the + QSysInfo::WindowsVersion variable gives the version of the system + on which the application is run. + + MS-DOS-based versions: + + \value WV_32s Windows 3.1 with Win 32s + \value WV_95 Windows 95 + \value WV_98 Windows 98 + \value WV_Me Windows Me + + NT-based versions (note that each operating system version is only represented once rather than each Windows edition): + + \value WV_NT Windows NT (operating system version 4.0) + \value WV_2000 Windows 2000 (operating system version 5.0) + \value WV_XP Windows XP (operating system version 5.1) + \value WV_2003 Windows Server 2003, Windows Server 2003 R2, Windows Home Server, Windows XP Professional x64 Edition (operating system version 5.2) + \value WV_VISTA Windows Vista, Windows Server 2008 (operating system version 6.0) + + Alternatively, you may use the following macros which correspond directly to the Windows operating system version number: + + \value WV_4_0 Operating system version 4.0, corresponds to Windows NT + \value WV_5_0 Operating system version 5.0, corresponds to Windows 2000 + \value WV_5_1 Operating system version 5.1, corresponds to Windows XP + \value WV_5_2 Operating system version 5.2, corresponds to Windows Server 2003, Windows Server 2003 R2, Windows Home Server, and Windows XP Professional x64 Edition + \value WV_6_0 Operating system version 6.0, corresponds to Windows Vista and Windows Server 2008 + + CE-based versions: + + \value WV_CE Windows CE + \value WV_CENET Windows CE .NET + \value WV_CE_5 Windows CE 5.x + \value WV_CE_6 Windows CE 6.x + + The following masks can be used for testing whether a Windows + version is MS-DOS-based, NT-based, or CE-based: + + \value WV_DOS_based MS-DOS-based version of Windows + \value WV_NT_based NT-based version of Windows + \value WV_CE_based CE-based version of Windows + + \sa MacVersion +*/ + +/*! + \enum QSysInfo::MacVersion + + This enum provides symbolic names for the various versions of the + Macintosh operating system. On Mac, the + QSysInfo::MacintoshVersion variable gives the version of the + system on which the application is run. + + \value MV_9 Mac OS 9 (unsupported) + \value MV_10_0 Mac OS X 10.0 (unsupported) + \value MV_10_1 Mac OS X 10.1 (unsupported) + \value MV_10_2 Mac OS X 10.2 (unsupported) + \value MV_10_3 Mac OS X 10.3 + \value MV_10_4 Mac OS X 10.4 + \value MV_10_5 Mac OS X 10.5 + \value MV_Unknown An unknown and currently unsupported platform + + \value MV_CHEETAH Apple codename for MV_10_0 + \value MV_PUMA Apple codename for MV_10_1 + \value MV_JAGUAR Apple codename for MV_10_2 + \value MV_PANTHER Apple codename for MV_10_3 + \value MV_TIGER Apple codename for MV_10_4 + \value MV_LEOPARD Apple codename for MV_10_5 + + \sa WinVersion +*/ + +/*! + \macro Q_WS_MAC + \relates <QtGlobal> + + Defined on Mac OS X. + + \sa Q_WS_WIN, Q_WS_X11, Q_WS_QWS +*/ + +/*! + \macro Q_WS_WIN + \relates <QtGlobal> + + Defined on Windows. + + \sa Q_WS_MAC, Q_WS_X11, Q_WS_QWS +*/ + +/*! + \macro Q_WS_X11 + \relates <QtGlobal> + + Defined on X11. + + \sa Q_WS_MAC, Q_WS_WIN, Q_WS_QWS +*/ + +/*! + \macro Q_WS_QWS + \relates <QtGlobal> + + Defined on Qt for Embedded Linux. + + \sa Q_WS_MAC, Q_WS_WIN, Q_WS_X11 +*/ + +/*! + \macro Q_OS_DARWIN + \relates <QtGlobal> + + Defined on Darwin OS (synonym for Q_OS_MAC). +*/ + +/*! + \macro Q_OS_MSDOS + \relates <QtGlobal> + + Defined on MS-DOS and Windows. +*/ + +/*! + \macro Q_OS_OS2 + \relates <QtGlobal> + + Defined on OS/2. +*/ + +/*! + \macro Q_OS_OS2EMX + \relates <QtGlobal> + + Defined on XFree86 on OS/2 (not PM). +*/ + +/*! + \macro Q_OS_WIN32 + \relates <QtGlobal> + + Defined on all supported versions of Windows. +*/ + +/*! + \macro Q_OS_WINCE + \relates <QtGlobal> + + Defined on Windows CE. +*/ + +/*! + \macro Q_OS_CYGWIN + \relates <QtGlobal> + + Defined on Cygwin. +*/ + +/*! + \macro Q_OS_SOLARIS + \relates <QtGlobal> + + Defined on Sun Solaris. +*/ + +/*! + \macro Q_OS_HPUX + \relates <QtGlobal> + + Defined on HP-UX. +*/ + +/*! + \macro Q_OS_ULTRIX + \relates <QtGlobal> + + Defined on DEC Ultrix. +*/ + +/*! + \macro Q_OS_LINUX + \relates <QtGlobal> + + Defined on Linux. +*/ + +/*! + \macro Q_OS_FREEBSD + \relates <QtGlobal> + + Defined on FreeBSD. +*/ + +/*! + \macro Q_OS_NETBSD + \relates <QtGlobal> + + Defined on NetBSD. +*/ + +/*! + \macro Q_OS_OPENBSD + \relates <QtGlobal> + + Defined on OpenBSD. +*/ + +/*! + \macro Q_OS_BSDI + \relates <QtGlobal> + + Defined on BSD/OS. +*/ + +/*! + \macro Q_OS_IRIX + \relates <QtGlobal> + + Defined on SGI Irix. +*/ + +/*! + \macro Q_OS_OSF + \relates <QtGlobal> + + Defined on HP Tru64 UNIX. +*/ + +/*! + \macro Q_OS_SCO + \relates <QtGlobal> + + Defined on SCO OpenServer 5. +*/ + +/*! + \macro Q_OS_UNIXWARE + \relates <QtGlobal> + + Defined on UnixWare 7, Open UNIX 8. +*/ + +/*! + \macro Q_OS_AIX + \relates <QtGlobal> + + Defined on AIX. +*/ + +/*! + \macro Q_OS_HURD + \relates <QtGlobal> + + Defined on GNU Hurd. +*/ + +/*! + \macro Q_OS_DGUX + \relates <QtGlobal> + + Defined on DG/UX. +*/ + +/*! + \macro Q_OS_RELIANT + \relates <QtGlobal> + + Defined on Reliant UNIX. +*/ + +/*! + \macro Q_OS_DYNIX + \relates <QtGlobal> + + Defined on DYNIX/ptx. +*/ + +/*! + \macro Q_OS_QNX + \relates <QtGlobal> + + Defined on QNX. +*/ + +/*! + \macro Q_OS_QNX6 + \relates <QtGlobal> + + Defined on QNX RTP 6.1. +*/ + +/*! + \macro Q_OS_LYNX + \relates <QtGlobal> + + Defined on LynxOS. +*/ + +/*! + \macro Q_OS_BSD4 + \relates <QtGlobal> + + Defined on Any BSD 4.4 system. +*/ + +/*! + \macro Q_OS_UNIX + \relates <QtGlobal> + + Defined on Any UNIX BSD/SYSV system. +*/ + +/*! + \macro Q_CC_SYM + \relates <QtGlobal> + + Defined if the application is compiled using Digital Mars C/C++ + (used to be Symantec C++). +*/ + +/*! + \macro Q_CC_MWERKS + \relates <QtGlobal> + + Defined if the application is compiled using Metrowerks + CodeWarrior. +*/ + +/*! + \macro Q_CC_MSVC + \relates <QtGlobal> + + Defined if the application is compiled using Microsoft Visual + C/C++, Intel C++ for Windows. +*/ + +/*! + \macro Q_CC_BOR + \relates <QtGlobal> + + Defined if the application is compiled using Borland/Turbo C++. +*/ + +/*! + \macro Q_CC_WAT + \relates <QtGlobal> + + Defined if the application is compiled using Watcom C++. +*/ + +/*! + \macro Q_CC_GNU + \relates <QtGlobal> + + Defined if the application is compiled using GNU C++. +*/ + +/*! + \macro Q_CC_COMEAU + \relates <QtGlobal> + + Defined if the application is compiled using Comeau C++. +*/ + +/*! + \macro Q_CC_EDG + \relates <QtGlobal> + + Defined if the application is compiled using Edison Design Group + C++. +*/ + +/*! + \macro Q_CC_OC + \relates <QtGlobal> + + Defined if the application is compiled using CenterLine C++. +*/ + +/*! + \macro Q_CC_SUN + \relates <QtGlobal> + + Defined if the application is compiled using Forte Developer, or + Sun Studio C++. +*/ + +/*! + \macro Q_CC_MIPS + \relates <QtGlobal> + + Defined if the application is compiled using MIPSpro C++. +*/ + +/*! + \macro Q_CC_DEC + \relates <QtGlobal> + + Defined if the application is compiled using DEC C++. +*/ + +/*! + \macro Q_CC_HPACC + \relates <QtGlobal> + + Defined if the application is compiled using HP aC++. +*/ + +/*! + \macro Q_CC_USLC + \relates <QtGlobal> + + Defined if the application is compiled using SCO OUDK and UDK. +*/ + +/*! + \macro Q_CC_CDS + \relates <QtGlobal> + + Defined if the application is compiled using Reliant C++. +*/ + +/*! + \macro Q_CC_KAI + \relates <QtGlobal> + + Defined if the application is compiled using KAI C++. +*/ + +/*! + \macro Q_CC_INTEL + \relates <QtGlobal> + + Defined if the application is compiled using Intel C++ for Linux, + Intel C++ for Windows. +*/ + +/*! + \macro Q_CC_HIGHC + \relates <QtGlobal> + + Defined if the application is compiled using MetaWare High C/C++. +*/ + +/*! + \macro Q_CC_PGI + \relates <QtGlobal> + + Defined if the application is compiled using Portland Group C++. +*/ + +/*! + \macro Q_CC_GHS + \relates <QtGlobal> + + Defined if the application is compiled using Green Hills + Optimizing C++ Compilers. +*/ + +#if defined(QT_BUILD_QMAKE) +// needed to bootstrap qmake +static const unsigned int qt_one = 1; +const int QSysInfo::ByteOrder = ((*((unsigned char *) &qt_one) == 0) ? BigEndian : LittleEndian); +#endif + +#if !defined(QWS) && defined(Q_OS_MAC) + +QT_BEGIN_INCLUDE_NAMESPACE +#include "private/qcore_mac_p.h" +#include "qnamespace.h" +QT_END_INCLUDE_NAMESPACE + +Q_CORE_EXPORT OSErr qt_mac_create_fsref(const QString &file, FSRef *fsref) +{ + return FSPathMakeRef(reinterpret_cast<const UInt8 *>(file.toUtf8().constData()), fsref, 0); +} + +// Don't use this function, it won't work in 10.5 (Leopard) and up +Q_CORE_EXPORT OSErr qt_mac_create_fsspec(const QString &file, FSSpec *spec) +{ + FSRef fsref; + OSErr ret = qt_mac_create_fsref(file, &fsref); + if (ret == noErr) + ret = FSGetCatalogInfo(&fsref, kFSCatInfoNone, 0, 0, spec, 0); + return ret; +} + +Q_CORE_EXPORT void qt_mac_to_pascal_string(QString s, Str255 str, TextEncoding encoding=0, int len=-1) +{ + if(len == -1) + len = s.length(); +#if 0 + UnicodeMapping mapping; + mapping.unicodeEncoding = CreateTextEncoding(kTextEncodingUnicodeDefault, + kTextEncodingDefaultVariant, + kUnicode16BitFormat); + mapping.otherEncoding = (encoding ? encoding : ); + mapping.mappingVersion = kUnicodeUseLatestMapping; + + UnicodeToTextInfo info; + OSStatus err = CreateUnicodeToTextInfo(&mapping, &info); + if(err != noErr) { + qDebug("Qt: internal: Unable to create pascal string '%s'::%d [%ld]", + s.left(len).latin1(), (int)encoding, err); + return; + } + const int unilen = len * 2; + const UniChar *unibuf = (UniChar *)s.unicode(); + ConvertFromUnicodeToPString(info, unilen, unibuf, str); + DisposeUnicodeToTextInfo(&info); +#else + Q_UNUSED(encoding); + CFStringGetPascalString(QCFString(s), str, 256, CFStringGetSystemEncoding()); +#endif +} + +Q_CORE_EXPORT QString qt_mac_from_pascal_string(const Str255 pstr) { + return QCFString(CFStringCreateWithPascalString(0, pstr, CFStringGetSystemEncoding())); +} + + + +static QSysInfo::MacVersion macVersion() +{ + SInt32 gestalt_version; + if (Gestalt(gestaltSystemVersion, &gestalt_version) == noErr) { + return QSysInfo::MacVersion(((gestalt_version & 0x00F0) >> 4) + 2); + } + return QSysInfo::MV_Unknown; +} +const QSysInfo::MacVersion QSysInfo::MacintoshVersion = macVersion(); + +#elif defined(Q_OS_WIN32) || defined(Q_OS_CYGWIN) || defined(Q_OS_WINCE) + +QT_BEGIN_INCLUDE_NAMESPACE +#include "qt_windows.h" +QT_END_INCLUDE_NAMESPACE + +QSysInfo::WinVersion QSysInfo::windowsVersion() +{ +#ifndef VER_PLATFORM_WIN32s +#define VER_PLATFORM_WIN32s 0 +#endif +#ifndef VER_PLATFORM_WIN32_WINDOWS +#define VER_PLATFORM_WIN32_WINDOWS 1 +#endif +#ifndef VER_PLATFORM_WIN32_NT +#define VER_PLATFORM_WIN32_NT 2 +#endif +#ifndef VER_PLATFORM_WIN32_CE +#define VER_PLATFORM_WIN32_CE 3 +#endif + + static QSysInfo::WinVersion winver; + if (winver) + return winver; + winver = QSysInfo::WV_NT; +#ifndef Q_OS_WINCE + OSVERSIONINFOA osver; + osver.dwOSVersionInfoSize = sizeof(osver); + GetVersionExA(&osver); +#else + DWORD qt_cever = 0; + OSVERSIONINFOW osver; + osver.dwOSVersionInfoSize = sizeof(osver); + GetVersionEx(&osver); + qt_cever = osver.dwMajorVersion * 100; + qt_cever += osver.dwMinorVersion * 10; +#endif + switch (osver.dwPlatformId) { + case VER_PLATFORM_WIN32s: + winver = QSysInfo::WV_32s; + break; + case VER_PLATFORM_WIN32_WINDOWS: + // We treat Windows Me (minor 90) the same as Windows 98 + if (osver.dwMinorVersion == 90) + winver = QSysInfo::WV_Me; + else if (osver.dwMinorVersion == 10) + winver = QSysInfo::WV_98; + else + winver = QSysInfo::WV_95; + break; +#ifdef Q_OS_WINCE + case VER_PLATFORM_WIN32_CE: + if (qt_cever >= 600) + winver = QSysInfo::WV_CE_6; + if (qt_cever >= 500) + winver = QSysInfo::WV_CE_5; + else if (qt_cever >= 400) + winver = QSysInfo::WV_CENET; + else + winver = QSysInfo::WV_CE; + break; +#endif + default: // VER_PLATFORM_WIN32_NT + if (osver.dwMajorVersion < 5) { + winver = QSysInfo::WV_NT; + } else if (osver.dwMajorVersion == 6) { + winver = QSysInfo::WV_VISTA; + } else if (osver.dwMinorVersion == 0) { + winver = QSysInfo::WV_2000; + } else if (osver.dwMinorVersion == 1) { + winver = QSysInfo::WV_XP; + } else if (osver.dwMinorVersion == 2) { + winver = QSysInfo::WV_2003; + } else { + qWarning("Qt: Untested Windows version detected!"); + winver = QSysInfo::WV_NT_based; + } + } + +#ifdef QT_DEBUG + { + QByteArray override = qgetenv("QT_WINVER_OVERRIDE"); + if (override.isEmpty()) + return winver; + + if (override == "Me") + winver = QSysInfo::WV_Me; + if (override == "95") + winver = QSysInfo::WV_95; + else if (override == "98") + winver = QSysInfo::WV_98; + else if (override == "NT") + winver = QSysInfo::WV_NT; + else if (override == "2000") + winver = QSysInfo::WV_2000; + else if (override == "2003") + winver = QSysInfo::WV_2003; + else if (override == "XP") + winver = QSysInfo::WV_XP; + else if (override == "VISTA") + winver = QSysInfo::WV_VISTA; + } +#endif + + return winver; +} + +const QSysInfo::WinVersion QSysInfo::WindowsVersion = QSysInfo::windowsVersion(); + +#endif + +/*! + \macro void Q_ASSERT(bool test) + \relates <QtGlobal> + + Prints a warning message containing the source code file name and + line number if \a test is false. + + Q_ASSERT() is useful for testing pre- and post-conditions + during development. It does nothing if \c QT_NO_DEBUG was defined + during compilation. + + Example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 17 + + If \c b is zero, the Q_ASSERT statement will output the following + message using the qFatal() function: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 18 + + \sa Q_ASSERT_X(), qFatal(), {Debugging Techniques} +*/ + +/*! + \macro void Q_ASSERT_X(bool test, const char *where, const char *what) + \relates <QtGlobal> + + Prints the message \a what together with the location \a where, + the source file name and line number if \a test is false. + + Q_ASSERT_X is useful for testing pre- and post-conditions during + development. It does nothing if \c QT_NO_DEBUG was defined during + compilation. + + Example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 19 + + If \c b is zero, the Q_ASSERT_X statement will output the following + message using the qFatal() function: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 20 + + \sa Q_ASSERT(), qFatal(), {Debugging Techniques} +*/ + +/*! + \macro void Q_CHECK_PTR(void *pointer) + \relates <QtGlobal> + + If \a pointer is 0, prints a warning message containing the source + code's file name and line number, saying that the program ran out + of memory. + + Q_CHECK_PTR does nothing if \c QT_NO_DEBUG was defined during + compilation. + + Example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 21 + + \sa qWarning(), {Debugging Techniques} +*/ + +/*! + \macro const char* Q_FUNC_INFO() + \relates <QtGlobal> + + Expands to a string that describe the function the macro resides in. How this string looks + more specifically is compiler dependent. With GNU GCC it is typically the function signature, + while with other compilers it might be the line and column number. + + Q_FUNC_INFO can be conveniently used with qDebug(). For example, this function: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 22 + + when instantiated with the integer type, will with the GCC compiler produce: + + \tt{const TInputType& myMin(const TInputType&, const TInputType&) [with TInputType = int] was called with value1: 3 value2: 4} + + If this macro is used outside a function, the behavior is undefined. + */ + +/* + The Q_CHECK_PTR macro calls this function if an allocation check + fails. +*/ +void qt_check_pointer(const char *n, int l) +{ + qWarning("In file %s, line %d: Out of memory", n, l); +} + +/* + The Q_ASSERT macro calls this function when the test fails. +*/ +void qt_assert(const char *assertion, const char *file, int line) +{ + qFatal("ASSERT: \"%s\" in file %s, line %d", assertion, file, line); +} + +/* + The Q_ASSERT_X macro calls this function when the test fails. +*/ +void qt_assert_x(const char *where, const char *what, const char *file, int line) +{ + qFatal("ASSERT failure in %s: \"%s\", file %s, line %d", where, what, file, line); +} + + +/* + Dijkstra's bisection algorithm to find the square root of an integer. + Deliberately not exported as part of the Qt API, but used in both + qsimplerichtext.cpp and qgfxraster_qws.cpp +*/ +Q_CORE_EXPORT unsigned int qt_int_sqrt(unsigned int n) +{ + // n must be in the range 0...UINT_MAX/2-1 + if (n >= (UINT_MAX>>2)) { + unsigned int r = 2 * qt_int_sqrt(n / 4); + unsigned int r2 = r + 1; + return (n >= r2 * r2) ? r2 : r; + } + uint h, p= 0, q= 1, r= n; + while (q <= n) + q <<= 2; + while (q != 1) { + q >>= 2; + h= p + q; + p >>= 1; + if (r >= h) { + p += q; + r -= h; + } + } + return p; +} + +#if defined(qMemCopy) +# undef qMemCopy +#endif +#if defined(qMemSet) +# undef qMemSet +#endif + +void *qMemCopy(void *dest, const void *src, size_t n) { return memcpy(dest, src, n); } +void *qMemSet(void *dest, int c, size_t n) { return memset(dest, c, n); } + +static QtMsgHandler handler = 0; // pointer to debug handler + +#ifdef Q_CC_MWERKS +extern bool qt_is_gui_used; +static void mac_default_handler(const char *msg) +{ + if (qt_is_gui_used) { + Str255 pmsg; + qt_mac_to_pascal_string(msg, pmsg); + DebugStr(pmsg); + } else { + fprintf(stderr, msg); + } +} +#endif // Q_CC_MWERKS + + + +QString qt_error_string(int errorCode) +{ + const char *s = 0; + QString ret; + if (errorCode == -1) { +#if defined(Q_OS_WIN) + errorCode = GetLastError(); +#else + errorCode = errno; +#endif + } + switch (errorCode) { + case 0: + break; + case EACCES: + s = QT_TRANSLATE_NOOP("QIODevice", "Permission denied"); + break; + case EMFILE: + s = QT_TRANSLATE_NOOP("QIODevice", "Too many open files"); + break; + case ENOENT: + s = QT_TRANSLATE_NOOP("QIODevice", "No such file or directory"); + break; + case ENOSPC: + s = QT_TRANSLATE_NOOP("QIODevice", "No space left on device"); + break; + default: { +#ifdef Q_OS_WIN + QT_WA({ + unsigned short *string = 0; + FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM, + NULL, + errorCode, + MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + (LPTSTR)&string, + 0, + NULL); + ret = QString::fromUtf16(string); + LocalFree((HLOCAL)string); + }, { + char *string = 0; + FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM, + NULL, + errorCode, + MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + (LPSTR)&string, + 0, + NULL); + ret = QString::fromLocal8Bit(string); + LocalFree((HLOCAL)string); + }); + + if (ret.isEmpty() && errorCode == ERROR_MOD_NOT_FOUND) + ret = QString::fromLatin1("The specified module could not be found."); + +#elif !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && _POSIX_VERSION >= 200112L && !defined(Q_OS_INTEGRITY) + + QByteArray buf(1024, '\0'); + strerror_r(errorCode, buf.data(), buf.size()); + ret = QString::fromLocal8Bit(buf.constData()); +#else + ret = QString::fromLocal8Bit(strerror(errorCode)); +#endif + break; } + } + if (s) + // ######## this breaks moc build currently +// ret = QCoreApplication::translate("QIODevice", s); + ret = QString::fromLatin1(s); + return ret.trimmed(); +} + + +/*! + \fn QtMsgHandler qInstallMsgHandler(QtMsgHandler handler) + \relates <QtGlobal> + + Installs a Qt message \a handler which has been defined + previously. Returns a pointer to the previous message handler + (which may be 0). + + The message handler is a function that prints out debug messages, + warnings, critical and fatal error messages. The Qt library (debug + version) contains hundreds of warning messages that are printed + when internal errors (usually invalid function arguments) + occur. If you implement your own message handler, you get total + control of these messages. + + The default message handler prints the message to the standard + output under X11 or to the debugger under Windows. If it is a + fatal message, the application aborts immediately. + + Only one message handler can be defined, since this is usually + done on an application-wide basis to control debug output. + + To restore the message handler, call \c qInstallMsgHandler(0). + + Example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 23 + + \sa qDebug(), qWarning(), qCritical(), qFatal(), QtMsgType, + {Debugging Techniques} +*/ +#if defined(Q_OS_WIN) && defined(QT_BUILD_CORE_LIB) +extern bool usingWinMain; +extern Q_CORE_EXPORT void qWinMsgHandler(QtMsgType t, const char* str); +#endif + +QtMsgHandler qInstallMsgHandler(QtMsgHandler h) +{ + QtMsgHandler old = handler; + handler = h; +#if defined(Q_OS_WIN) && defined(QT_BUILD_CORE_LIB) + if (!handler && usingWinMain) + handler = qWinMsgHandler; +#endif + return old; +} + +/*! + \internal +*/ +void qt_message_output(QtMsgType msgType, const char *buf) +{ + if (handler) { + (*handler)(msgType, buf); + } else { +#if defined(Q_CC_MWERKS) + mac_default_handler(buf); +#elif defined(Q_OS_WINCE) + QString fstr = QString::fromLatin1(buf); + fstr += QLatin1String("\n"); + OutputDebugString(reinterpret_cast<const wchar_t *> (fstr.utf16())); +#else + fprintf(stderr, "%s\n", buf); + fflush(stderr); +#endif + } + + if (msgType == QtFatalMsg + || (msgType == QtWarningMsg + && (!qgetenv("QT_FATAL_WARNINGS").isNull())) ) { + +#if defined(Q_CC_MSVC) && defined(QT_DEBUG) && defined(_DEBUG) && defined(_CRT_ERROR) + // get the current report mode + int reportMode = _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_WNDW); + _CrtSetReportMode(_CRT_ERROR, reportMode); +#if !defined(Q_OS_WINCE) + int ret = _CrtDbgReport(_CRT_ERROR, __FILE__, __LINE__, QT_VERSION_STR, buf); +#else + int ret = _CrtDbgReportW(_CRT_ERROR, _CRT_WIDE(__FILE__), + __LINE__, _CRT_WIDE(QT_VERSION_STR), reinterpret_cast<const wchar_t *> (QString::fromLatin1(buf).utf16())); +#endif + if (ret == 0 && reportMode & _CRTDBG_MODE_WNDW) + return; // ignore + else if (ret == 1) + _CrtDbgBreak(); +#endif + +#if (defined(Q_OS_UNIX) || defined(Q_CC_MINGW)) + abort(); // trap; generates core dump +#else + exit(1); // goodbye cruel world +#endif + } +} + +#undef qDebug +/*! + \relates <QtGlobal> + + Calls the message handler with the debug message \a msg. If no + message handler has been installed, the message is printed to + stderr. Under Windows, the message is sent to the console, if it is a + console application; otherwise, it is sent to the debugger. This + function does nothing if \c QT_NO_DEBUG_OUTPUT was defined + during compilation. + + If you pass the function a format string and a list of arguments, + it works in similar way to the C printf() function. + + Example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 24 + + If you include \c <QtDebug>, a more convenient syntax is also + available: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 25 + + This syntax automatically puts a single space between each item, + and outputs a newline at the end. It supports many C++ and Qt + types. + + To supress the output at runtime, install your own message handler + with qInstallMsgHandler(). + + \sa qWarning(), qCritical(), qFatal(), qInstallMsgHandler(), + {Debugging Techniques} +*/ +void qDebug(const char *msg, ...) +{ + QString buf; + va_list ap; + va_start(ap, msg); // use variable arg list + if (msg) + buf.vsprintf(msg, ap); + va_end(ap); + + qt_message_output(QtDebugMsg, buf.toLocal8Bit().constData()); +} + +#undef qWarning +/*! + \relates <QtGlobal> + + Calls the message handler with the warning message \a msg. If no + message handler has been installed, the message is printed to + stderr. Under Windows, the message is sent to the debugger. This + function does nothing if \c QT_NO_WARNING_OUTPUT was defined + during compilation; it exits if the environment variable \c + QT_FATAL_WARNINGS is defined. + + This function takes a format string and a list of arguments, + similar to the C printf() function. + + Example: + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 26 + + If you include <QtDebug>, a more convenient syntax is + also available: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 27 + + This syntax inserts a space between each item, and + appends a newline at the end. + + To supress the output at runtime, install your own message handler + with qInstallMsgHandler(). + + \sa qDebug(), qCritical(), qFatal(), qInstallMsgHandler(), + {Debugging Techniques} +*/ +void qWarning(const char *msg, ...) +{ + QString buf; + va_list ap; + va_start(ap, msg); // use variable arg list + if (msg) + buf.vsprintf(msg, ap); + va_end(ap); + + qt_message_output(QtWarningMsg, buf.toLocal8Bit().constData()); +} + +/*! + \relates <QtGlobal> + + Calls the message handler with the critical message \a msg. If no + message handler has been installed, the message is printed to + stderr. Under Windows, the message is sent to the debugger. + + This function takes a format string and a list of arguments, similar + to the C printf() function. + + Example: + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 28 + + If you include <QtDebug>, a more convenient syntax is + also available: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 29 + + A space is inserted between the items, and a newline is + appended at the end. + + To supress the output at runtime, install your own message handler + with qInstallMsgHandler(). + + \sa qDebug(), qWarning(), qFatal(), qInstallMsgHandler(), + {Debugging Techniques} +*/ +void qCritical(const char *msg, ...) +{ + QString buf; + va_list ap; + va_start(ap, msg); // use variable arg list + if (msg) + buf.vsprintf(msg, ap); + va_end(ap); + + qt_message_output(QtCriticalMsg, buf.toLocal8Bit().constData()); +} +#ifdef QT3_SUPPORT +void qSystemWarning(const char *msg, int code) + { qCritical("%s (%s)", msg, qt_error_string(code).toLocal8Bit().constData()); } +#endif // QT3_SUPPORT + +void qErrnoWarning(const char *msg, ...) +{ + QString buf; + va_list ap; + va_start(ap, msg); + if (msg) + buf.vsprintf(msg, ap); + va_end(ap); + + qCritical("%s (%s)", buf.toLocal8Bit().constData(), qt_error_string(-1).toLocal8Bit().constData()); +} + +void qErrnoWarning(int code, const char *msg, ...) +{ + QString buf; + va_list ap; + va_start(ap, msg); + if (msg) + buf.vsprintf(msg, ap); + va_end(ap); + + qCritical("%s (%s)", buf.toLocal8Bit().constData(), qt_error_string(code).toLocal8Bit().constData()); +} + +/*! + \relates <QtGlobal> + + Calls the message handler with the fatal message \a msg. If no + message handler has been installed, the message is printed to + stderr. Under Windows, the message is sent to the debugger. + + If you are using the \bold{default message handler} this function will + abort on Unix systems to create a core dump. On Windows, for debug builds, + this function will report a _CRT_ERROR enabling you to connect a debugger + to the application. + + This function takes a format string and a list of arguments, + similar to the C printf() function. + + Example: + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 30 + + To supress the output at runtime, install your own message handler + with qInstallMsgHandler(). + + \sa qDebug(), qCritical(), qWarning(), qInstallMsgHandler(), + {Debugging Techniques} +*/ +void qFatal(const char *msg, ...) +{ + QString buf; + va_list ap; + va_start(ap, msg); // use variable arg list + if (msg) + buf.vsprintf(msg, ap); + va_end(ap); + + qt_message_output(QtFatalMsg, buf.toLocal8Bit().constData()); +} + +// getenv is declared as deprecated in VS2005. This function +// makes use of the new secure getenv function. +QByteArray qgetenv(const char *varName) +{ +#if defined(_MSC_VER) && _MSC_VER >= 1400 + size_t requiredSize = 0; + QByteArray buffer; + getenv_s(&requiredSize, 0, 0, varName); + if (requiredSize == 0) + return buffer; + buffer.resize(int(requiredSize)); + getenv_s(&requiredSize, buffer.data(), requiredSize, varName); + // requiredSize includes the terminating null, which we don't want. + Q_ASSERT(buffer.endsWith('\0')); + buffer.chop(1); + return buffer; +#else + return QByteArray(::getenv(varName)); +#endif +} + +bool qputenv(const char *varName, const QByteArray& value) +{ +#if defined(_MSC_VER) && _MSC_VER >= 1400 + return _putenv_s(varName, value.constData()) == 0; +#else + QByteArray buffer(varName); + buffer += "="; + buffer += value; + return putenv(qstrdup(buffer.constData())) == 0; +#endif +} + +#if defined(Q_OS_UNIX) && !defined(QT_NO_THREAD) + +# if defined(Q_OS_INTEGRITY) && defined(__GHS_VERSION_NUMBER) && (__GHS_VERSION_NUMBER < 500) +// older versions of INTEGRITY used a long instead of a uint for the seed. +typedef long SeedStorageType; +# else +typedef uint SeedStorageType; +# endif + +typedef QThreadStorage<SeedStorageType *> SeedStorage; +Q_GLOBAL_STATIC(SeedStorage, randTLS) // Thread Local Storage for seed value + +#endif + +/*! + \relates <QtGlobal> + \since 4.2 + + Thread-safe version of the standard C++ \c srand() function. + + Sets the argument \a seed to be used to generate a new random number sequence of + pseudo random integers to be returned by qrand(). + + If no seed value is provided, qrand() is automatically seeded with a value of 1. + + The sequence of random numbers generated is deterministic per thread. For example, + if two threads call qsrand(1) and subsequently calls qrand(), the threads will get + the same random number sequence. + + \sa qrand() +*/ +void qsrand(uint seed) +{ +#if defined(Q_OS_UNIX) && !defined(QT_NO_THREAD) + SeedStorageType *pseed = randTLS()->localData(); + if (!pseed) + randTLS()->setLocalData(pseed = new SeedStorageType); + *pseed = seed; +#else + // On Windows srand() and rand() already use Thread-Local-Storage + // to store the seed between calls + srand(seed); +#endif +} + +/*! + \relates <QtGlobal> + \since 4.2 + + Thread-safe version of the standard C++ \c rand() function. + + Returns a value between 0 and \c RAND_MAX (defined in \c <cstdlib> and + \c <stdlib.h>), the next number in the current sequence of pseudo-random + integers. + + Use \c qsrand() to initialize the pseudo-random number generator with + a seed value. + + \sa qsrand() +*/ +int qrand() +{ +#if defined(Q_OS_UNIX) && !defined(QT_NO_THREAD) + SeedStorageType *pseed = randTLS()->localData(); + if (!pseed) { + randTLS()->setLocalData(pseed = new SeedStorageType); + *pseed = 1; + } + return rand_r(pseed); +#else + // On Windows srand() and rand() already use Thread-Local-Storage + // to store the seed between calls + return rand(); +#endif +} + +/*! + \macro forever + \relates <QtGlobal> + + This macro is provided for convenience for writing infinite + loops. + + Example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 31 + + It is equivalent to \c{for (;;)}. + + If you're worried about namespace pollution, you can disable this + macro by adding the following line to your \c .pro file: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 32 + + \sa Q_FOREVER +*/ + +/*! + \macro Q_FOREVER + \relates <QtGlobal> + + Same as \l{forever}. + + This macro is available even when \c no_keywords is specified + using the \c .pro file's \c CONFIG variable. + + \sa foreach() +*/ + +/*! + \macro foreach(variable, container) + \relates <QtGlobal> + + This macro is used to implement Qt's \c foreach loop. The \a + variable parameter is a variable name or variable definition; the + \a container parameter is a Qt container whose value type + corresponds to the type of the variable. See \l{The foreach + Keyword} for details. + + If you're worried about namespace pollution, you can disable this + macro by adding the following line to your \c .pro file: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 33 + + \sa Q_FOREACH() +*/ + +/*! + \macro Q_FOREACH(variable, container) + \relates <QtGlobal> + + Same as foreach(\a variable, \a container). + + This macro is available even when \c no_keywords is specified + using the \c .pro file's \c CONFIG variable. + + \sa foreach() +*/ + +/*! + \macro QT_TR_NOOP(sourceText) + \relates <QtGlobal> + + Marks the string literal \a sourceText for dynamic translation in + the current context (class), i.e the stored \a sourceText will not + be altered. + + The macro expands to \a sourceText. + + Example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 34 + + The macro QT_TR_NOOP_UTF8() is identical except that it tells lupdate + that the source string is encoded in UTF-8. Corresponding variants + exist in the QT_TRANSLATE_NOOP() family of macros, too. Note that + using these macros is not required if \c CODECFORTR is already set to + UTF-8 in the qmake project file. + + \sa QT_TRANSLATE_NOOP(), {Internationalization with Qt} +*/ + +/*! + \macro QT_TRANSLATE_NOOP(context, sourceText) + \relates <QtGlobal> + + Marks the string literal \a sourceText for dynamic translation in + the given \a context, i.e the stored \a sourceText will not be + altered. The \a context is typically a class and also needs to + be specified as string literal. + + The macro expands to \a sourceText. + + Example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 35 + + \sa QT_TR_NOOP(), QT_TRANSLATE_NOOP3(), {Internationalization with Qt} +*/ + +/*! + \macro QT_TRANSLATE_NOOP3(context, sourceText, comment) + \relates <QtGlobal> + \since 4.4 + + Marks the string literal \a sourceText for dynamic translation in the + given \a context and with \a comment, i.e the stored \a sourceText will + not be altered. The \a context is typically a class and also needs to + be specified as string literal. The string literal \a comment + will be available for translators using e.g. Qt Linguist. + + The macro expands to anonymous struct of the two string + literals passed as \a sourceText and \a comment. + + Example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 36 + + \sa QT_TR_NOOP(), QT_TRANSLATE_NOOP(), {Internationalization with Qt} +*/ + +/*! + \macro QT_POINTER_SIZE + \relates <QtGlobal> + + Expands to the size of a pointer in bytes (4 or 8). This is + equivalent to \c sizeof(void *) but can be used in a preprocessor + directive. +*/ + +/*! + \macro TRUE + \relates <QtGlobal> + \obsolete + + Synonym for \c true. + + \sa FALSE +*/ + +/*! + \macro FALSE + \relates <QtGlobal> + \obsolete + + Synonym for \c false. + + \sa TRUE +*/ + +/*! + \macro QABS(n) + \relates <QtGlobal> + \obsolete + + Use qAbs(\a n) instead. + + \sa QMIN(), QMAX() +*/ + +/*! + \macro QMIN(x, y) + \relates <QtGlobal> + \obsolete + + Use qMin(\a x, \a y) instead. + + \sa QMAX(), QABS() +*/ + +/*! + \macro QMAX(x, y) + \relates <QtGlobal> + \obsolete + + Use qMax(\a x, \a y) instead. + + \sa QMIN(), QABS() +*/ + +/*! + \macro const char *qPrintable(const QString &str) + \relates <QtGlobal> + + Returns \a str as a \c{const char *}. This is equivalent to + \a{str}.toLocal8Bit().constData(). + + The char pointer will be invalid after the statement in which + qPrintable() is used. This is because the array returned by + toLocal8Bit() will fall out of scope. + + Example: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 37 + + + \sa qDebug(), qWarning(), qCritical(), qFatal() +*/ + +/*! + \macro Q_DECLARE_TYPEINFO(Type, Flags) + \relates <QtGlobal> + + You can use this macro to specify information about a custom type + \a Type. With accurate type information, Qt's \l{generic + containers} can choose appropriate storage methods and algorithms. + + \a Flags can be one of the following: + + \list + \o \c Q_PRIMITIVE_TYPE specifies that \a Type is a POD (plain old + data) type with no constructor or destructor. + \o \c Q_MOVABLE_TYPE specifies that \a Type has a constructor + and/or a destructor but can be moved in memory using \c + memcpy(). + \o \c Q_COMPLEX_TYPE (the default) specifies that \a Type has + constructors and/or a destructor and that it may not be moved + in memory. + \endlist + + Example of a "primitive" type: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 38 + + Example of a movable type: + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 39 +*/ + +/*! + \macro Q_UNUSED(name) + \relates <QtGlobal> + + Indicates to the compiler that the parameter with the specified + \a name is not used in the body of a function. This can be used to + suppress compiler warnings while allowing functions to be defined + with meaningful parameter names in their signatures. +*/ + +#if defined(QT3_SUPPORT) && !defined(QT_NO_SETTINGS) +QT_BEGIN_INCLUDE_NAMESPACE +#include <qlibraryinfo.h> +QT_END_INCLUDE_NAMESPACE + +static const char *qInstallLocation(QLibraryInfo::LibraryLocation loc) +{ + static QByteArray ret; + ret = QLibraryInfo::location(loc).toLatin1(); + return ret.constData(); +} +const char *qInstallPath() +{ + return qInstallLocation(QLibraryInfo::PrefixPath); +} +const char *qInstallPathDocs() +{ + return qInstallLocation(QLibraryInfo::DocumentationPath); +} +const char *qInstallPathHeaders() +{ + return qInstallLocation(QLibraryInfo::HeadersPath); +} +const char *qInstallPathLibs() +{ + return qInstallLocation(QLibraryInfo::LibrariesPath); +} +const char *qInstallPathBins() +{ + return qInstallLocation(QLibraryInfo::BinariesPath); +} +const char *qInstallPathPlugins() +{ + return qInstallLocation(QLibraryInfo::PluginsPath); +} +const char *qInstallPathData() +{ + return qInstallLocation(QLibraryInfo::DataPath); +} +const char *qInstallPathTranslations() +{ + return qInstallLocation(QLibraryInfo::TranslationsPath); +} +const char *qInstallPathSysconf() +{ + return qInstallLocation(QLibraryInfo::SettingsPath); +} +#endif + +struct QInternal_CallBackTable { + QVector<QList<qInternalCallback> > callbacks; +}; + +Q_GLOBAL_STATIC(QInternal_CallBackTable, global_callback_table) + +bool QInternal::registerCallback(Callback cb, qInternalCallback callback) +{ + if (cb >= 0 && cb < QInternal::LastCallback) { + QInternal_CallBackTable *cbt = global_callback_table(); + cbt->callbacks.resize(cb + 1); + cbt->callbacks[cb].append(callback); + return true; + } + return false; +} + +bool QInternal::unregisterCallback(Callback cb, qInternalCallback callback) +{ + if (cb >= 0 && cb < QInternal::LastCallback) { + QInternal_CallBackTable *cbt = global_callback_table(); + return (bool) cbt->callbacks[cb].removeAll(callback); + } + return false; +} + +bool QInternal::activateCallbacks(Callback cb, void **parameters) +{ + Q_ASSERT_X(cb >= 0, "QInternal::activateCallback()", "Callback id must be a valid id"); + + QInternal_CallBackTable *cbt = global_callback_table(); + if (cbt && cb < cbt->callbacks.size()) { + QList<qInternalCallback> callbacks = cbt->callbacks[cb]; + bool ret = false; + for (int i=0; i<callbacks.size(); ++i) + ret |= (callbacks.at(i))(parameters); + return ret; + } + return false; +} + +extern void qt_set_current_thread_to_main_thread(); + +bool QInternal::callFunction(InternalFunction func, void **args) +{ + Q_ASSERT_X(func >= 0, + "QInternal::callFunction()", "Callback id must be a valid id"); +#ifndef QT_NO_QOBJECT + switch (func) { +#ifndef QT_NO_THREAD + case QInternal::CreateThreadForAdoption: + *args = QAdoptedThread::createThreadForAdoption(); + return true; +#endif + case QInternal::RefAdoptedThread: + QThreadData::get2((QThread *) *args)->ref(); + return true; + case QInternal::DerefAdoptedThread: + QThreadData::get2((QThread *) *args)->deref(); + return true; + case QInternal::SetCurrentThreadToMainThread: + qt_set_current_thread_to_main_thread(); + return true; + case QInternal::SetQObjectSender: { + QObject *receiver = (QObject *) args[0]; + QObjectPrivate::Sender *sender = new QObjectPrivate::Sender; + sender->sender = (QObject *) args[1]; + sender->signal = *(int *) args[2]; + sender->ref = 1; + + // Store the old sender as "return value" + args[3] = QObjectPrivate::setCurrentSender(receiver, sender); + args[4] = sender; + return true; + } + case QInternal::GetQObjectSender: { + QObject *receiver = (QObject *) args[0]; + QObjectPrivate *d = QObjectPrivate::get(receiver); + args[1] = d->currentSender ? d->currentSender->sender : 0; + return true; + } + case QInternal::ResetQObjectSender: { + QObject *receiver = (QObject *) args[0]; + QObjectPrivate::Sender *oldSender = (QObjectPrivate::Sender *) args[1]; + QObjectPrivate::Sender *sender = (QObjectPrivate::Sender *) args[2]; + QObjectPrivate::resetCurrentSender(receiver, sender, oldSender); + delete sender; + return true; + } + + default: + break; + } +#else + Q_UNUSED(args); + Q_UNUSED(func); +#endif + + return false; +} + +/*! + \macro Q_BYTE_ORDER + \relates <QtGlobal> + + This macro can be used to determine the byte order your system + uses for storing data in memory. i.e., whether your system is + little-endian or big-endian. It is set by Qt to one of the macros + Q_LITTLE_ENDIAN or Q_BIG_ENDIAN. You normally won't need to worry + about endian-ness, but you might, for example if you need to know + which byte of an integer or UTF-16 character is stored in the + lowest address. Endian-ness is important in networking, where + computers with different values for Q_BYTE_ORDER must pass data + back and forth. + + Use this macro as in the following examples. + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 40 + + \sa Q_BIG_ENDIAN, Q_LITTLE_ENDIAN +*/ + +/*! + \macro Q_LITTLE_ENDIAN + \relates <QtGlobal> + + This macro represents a value you can compare to the macro + Q_BYTE_ORDER to determine the endian-ness of your system. In a + little-endian system, the least significant byte is stored at the + lowest address. The other bytes follow in increasing order of + significance. + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 41 + + \sa Q_BYTE_ORDER, Q_BIG_ENDIAN +*/ + +/*! + \macro Q_BIG_ENDIAN + \relates <QtGlobal> + + This macro represents a value you can compare to the macro + Q_BYTE_ORDER to determine the endian-ness of your system. In a + big-endian system, the most significant byte is stored at the + lowest address. The other bytes follow in decreasing order of + significance. + + \snippet doc/src/snippets/code/src_corelib_global_qglobal.cpp 42 + + \sa Q_BYTE_ORDER, Q_LITTLE_ENDIAN +*/ + +/*! + \macro Q_GLOBAL_STATIC(type, name) + \internal + + Declares a global static variable with the given \a type and \a name. + + Use this macro to instantiate an object in a thread-safe way, creating + a global pointer that can be used to refer to it. + + \warning This macro is subject to a race condition that can cause the object + to be constructed twice. However, if this occurs, the second instance will + be immediately deleted. + + See also + \l{http://www.aristeia.com/publications.html}{"C++ and the perils of Double-Checked Locking"} + by Scott Meyers and Andrei Alexandrescu. +*/ + +/*! + \macro Q_GLOBAL_STATIC_WITH_ARGS(type, name, arguments) + \internal + + Declares a global static variable with the specified \a type and \a name. + + Use this macro to instantiate an object using the \a arguments specified + in a thread-safe way, creating a global pointer that can be used to refer + to it. + + \warning This macro is subject to a race condition that can cause the object + to be constructed twice. However, if this occurs, the second instance will + be immediately deleted. + + See also + \l{http://www.aristeia.com/publications.html}{"C++ and the perils of Double-Checked Locking"} + by Scott Meyers and Andrei Alexandrescu. +*/ + +/*! + \macro QT_NAMESPACE + \internal + + If this macro is defined to \c ns all Qt classes are put in a namespace + called \c ns. Also, moc will output code putting metaobjects etc. + into namespace \c ns. + + \sa QT_BEGIN_NAMESPACE, QT_END_NAMESPACE, + QT_PREPEND_NAMESPACE, QT_USE_NAMESPACE, + QT_BEGIN_INCLUDE_NAMESPACE, QT_END_INCLUDE_NAMESPACE, + QT_BEGIN_MOC_NAMESPACE, QT_END_MOC_NAMESPACE, +*/ + +/*! + \macro QT_PREPEND_NAMESPACE(identifier) + \internal + + This macro qualifies \a identifier with the full namespace. + It expands to \c{::QT_NAMESPACE::identifier} if \c QT_NAMESPACE is defined + and only \a identifier otherwise. + + \sa QT_NAMESPACE +*/ + +/*! + \macro QT_USE_NAMESPACE + \internal + + This macro expands to using QT_NAMESPACE if QT_NAMESPACE is defined + and nothing otherwise. + + \sa QT_NAMESPACE +*/ + +/*! + \macro QT_BEGIN_NAMESPACE + \internal + + This macro expands to + + \snippet snippets/code/src_corelib_global_qglobal.cpp begin namespace macro + + if \c QT_NAMESPACE is defined and nothing otherwise. If should always + appear in the file-level scope and be followed by \c QT_END_NAMESPACE + at the same logical level with respect to preprocessor conditionals + in the same file. + + As a rule of thumb, \c QT_BEGIN_NAMESPACE should appear in all Qt header + and Qt source files after the last \c{#include} line and before the first + declaration. In Qt headers using \c QT_BEGIN_HEADER, \c QT_BEGIN_NAMESPACE + follows \c QT_BEGIN_HEADER immediately. + + If that rule can't be followed because, e.g., \c{#include} lines and + declarations are wildly mixed, place \c QT_BEGIN_NAMESPACE before + the first declaration and wrap the \c{#include} lines in + \c QT_BEGIN_INCLUDE_NAMESPACE and \c QT_END_INCLUDE_NAMESPACE. + + When using the \c QT_NAMESPACE feature in user code + (e.g., when building plugins statically linked to Qt) where + the user code is not intended to go into the \c QT_NAMESPACE + namespace, all forward declarations of Qt classes need to + be wrapped in \c QT_BEGIN_NAMESPACE and \c QT_END_NAMESPACE. + After that, a \c QT_USE_NAMESPACE should follow. + No further changes should be needed. + + \sa QT_NAMESPACE +*/ + +/*! + \macro QT_END_NAMESPACE + \internal + + This macro expands to + + \snippet snippets/code/src_corelib_global_qglobal.cpp end namespace macro + + if \c QT_NAMESPACE is defined and nothing otherwise. It is used to cancel + the effect of \c QT_BEGIN_NAMESPACE. + + If a source file ends with a \c{#include} directive that includes a moc file, + \c QT_END_NAMESPACE should be placed before that \c{#include}. + + \sa QT_NAMESPACE +*/ + +/*! + \macro QT_BEGIN_INCLUDE_NAMESPACE + \internal + + This macro is equivalent to \c QT_END_NAMESPACE. + It only serves as syntactic sugar and is intended + to be used before #include lines within a + \c QT_BEGIN_NAMESPACE ... \c QT_END_NAMESPACE block. + + \sa QT_NAMESPACE +*/ + +/*! + \macro QT_END_INCLUDE_NAMESPACE + \internal + + This macro is equivalent to \c QT_BEGIN_NAMESPACE. + It only serves as syntactic sugar and is intended + to be used after #include lines within a + \c QT_BEGIN_NAMESPACE ... \c QT_END_NAMESPACE block. + + \sa QT_NAMESPACE +*/ + +/*! + \macro QT_BEGIN_MOC_NAMESPACE + \internal + + This macro is output by moc at the beginning of + moc files. It is equivalent to \c QT_USE_NAMESPACE. + + \sa QT_NAMESPACE +*/ + +/*! + \macro QT_END_MOC_NAMESPACE + \internal + + This macro is output by moc at the beginning of + moc files. It expands to nothing. + + \sa QT_NAMESPACE +*/ + +/*! + \fn bool qFuzzyCompare(double p1, double p2) + \relates <QtGlobal> + \since 4.4 + \threadsafe + + Compares the floating point value \a p1 and \a p2 and + returns \c true if they are considered equal, otherwise \c false. + + The two numbers are compared in a relative way, where the + exactness is stronger the smaller the numbers are. + */ + +/*! + \fn bool qFuzzyCompare(float p1, float p2) + \relates <QtGlobal> + \since 4.4 + \threadsafe + \overload + */ + +/*! + \macro QT_REQUIRE_VERSION(int argc, char **argv, const char *version) + \relates <QtGlobal> + + This macro can be used to ensure that the application is run + against a recent enough version of Qt. This is especially useful + if your application depends on a specific bug fix introduced in a + bug-fix release (e.g., 4.0.2). + + The \a argc and \a argv parameters are the \c main() function's + \c argc and \c argv parameters. The \a version parameter is a + string literal that specifies which version of Qt the application + requires (e.g., "4.0.2"). + + Example: + + \snippet doc/src/snippets/code/src_gui_dialogs_qmessagebox.cpp 4 +*/ + +QT_END_NAMESPACE |