qglobal.cpp

奇趣公司比较新的qt/emd版本

    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)

#include "private/qcore_mac_p.h"
#include "qnamespace.h"

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_TEMP)

#include "qt_windows.h"

static QSysInfo::WinVersion winVersion()
{
#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 = QSysInfo::WV_NT;
#ifndef Q_OS_TEMP
    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_TEMP
    case VER_PLATFORM_WIN32_CE:
#ifdef Q_OS_TEMP
        if (qt_cever >= 400)
            winver = QSysInfo::WV_CENET;
        else
#endif
            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 = winVersion();

#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:

    \code
        // File: div.cpp

        #include <QtGlobal>

        int divide(int a, int b)
        {
            Q_ASSERT(b != 0);
            return a / b;
        }
    \endcode

    If \c b is zero, the Q_ASSERT statement will output the following
    message using the qFatal() function:

    \code
        ASSERT: "b == 0" in file div.cpp, line 7
    \endcode

    \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:

    \code
        // File: div.cpp

        #include <QtGlobal>

        int divide(int a, int b)
        {
            Q_ASSERT_X(b != 0, "divide", "division by zero");
            return a / b;
        }
    \endcode

    If \c b is zero, the Q_ASSERT_X statement will output the following
    message using the qFatal() function:

    \code
        ASSERT failure in divide: "division by zero", file div.cpp, line 7
    \endcode

    \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:

    \code
        int *a;

        Q_CHECK_PTR(a = new int[80]);   // WRONG!

        a = new (nothrow) int[80];      // Right
        Q_CHECK_PTR(a);
    \endcode

    \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:

    \code
        template<typename TInputType>
        const TInputType &myMin(const TInputType &value1, const TInputType &value2)
        {
            qDebug() << Q_FUNC_INFO << "was called with value1:" << value1 << "value2:" << value2;

            if(value1 < value2)
                return value1;
            else
                return value2;
        }
    \endcode

    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 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 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 *qMalloc(size_t size) { return ::malloc(size); }
void qFree(void *ptr) { ::free(ptr); }
void *qRealloc(void *ptr, size_t size) { return ::realloc(ptr, size); }
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
static const int QT_BUFFER_LENGTH = 8192;       // internal buffer length

#ifdef Q_CC_MWERKS
#include <CoreServices/CoreServices.h>
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_WIN32)
        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);
        });
#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 message \a handler.

    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:

    \code
        #include <qapplication.h>
        #include <stdio.h>
        #include <stdlib.h>

        void myMessageOutput(QtMsgType type, const char *msg)
        {
            switch (type) {
            case QtDebugMsg:
                fprintf(stderr, "Debug: %s\n", msg);