/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the test suite of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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#ifndef QNUM_H+
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#define QNUM_H+
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+
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//+
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//  W A R N I N G+
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//  -------------+
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//+
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// This file is not part of the Qt API.  It exists purely as an+
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// implementation detail.  This header file may change from version to+
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// version without notice, or even be removed.+
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//+
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// We mean it.+
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//+
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+
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#include "QtCore/qglobal.h"+
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+
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static const unsigned char qt_be_inf_bytes[] = { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 };+
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static const unsigned char qt_le_inf_bytes[] = { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f };+
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static inline double qtInf()+
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{+
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    return *reinterpret_cast<const double *>(QSysInfo::ByteOrder == QSysInfo::BigEndian ? qt_be_inf_bytes : qt_le_inf_bytes);+
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}+
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#define Q_INFINITY (::qtInf())+
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+
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// Signaling NAN+
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static const unsigned char qt_be_snan_bytes[] = { 0x7f, 0xf8, 0, 0, 0, 0, 0, 0 };+
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static const unsigned char qt_le_snan_bytes[] = { 0, 0, 0, 0, 0, 0, 0xf8, 0x7f };+
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static inline double qtSnan()+
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{+
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    return *reinterpret_cast<const double *>(QSysInfo::ByteOrder == QSysInfo::BigEndian ? qt_be_snan_bytes : qt_le_snan_bytes);+
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}+
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#define Q_SNAN (::qtSnan())+
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+
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// Quiet NAN+
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static const unsigned char qt_be_qnan_bytes[] = { 0xff, 0xf8, 0, 0, 0, 0, 0, 0 };+
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static const unsigned char qt_le_qnan_bytes[] = { 0, 0, 0, 0, 0, 0, 0xf8, 0xff };+
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static inline double qtQnan()+
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{+
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    return *reinterpret_cast<const double *>(QSysInfo::ByteOrder == QSysInfo::BigEndian ? qt_be_qnan_bytes : qt_le_qnan_bytes);+
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}+
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#define Q_QNAN (::qtQnan())+
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+
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static inline bool qIsInf(double d)+
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{+
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    uchar *ch = (uchar *)&d;+
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    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {+
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        return (ch[0] & 0x7f) == 0x7f && ch[1] == 0xf0;+
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    } else {+
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        return (ch[7] & 0x7f) == 0x7f && ch[6] == 0xf0;+
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    }+
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}+
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+
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static inline bool qIsNaN(double d)+
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{+
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    uchar *ch = (uchar *)&d;+
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    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {+
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        return (ch[0] & 0x7f) == 0x7f && ch[1] > 0xf0;+
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    } else {+
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        return (ch[7] & 0x7f) == 0x7f && ch[6] > 0xf0;+
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    }+
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}+
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+
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static inline bool qIsFinite(double d)+
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{+
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    uchar *ch = (uchar *)&d;+
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    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {+
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        return (ch[0] & 0x7f) != 0x7f || (ch[1] & 0xf0) != 0xf0;+
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    } else {+
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        return (ch[7] & 0x7f) != 0x7f || (ch[6] & 0xf0) != 0xf0;+
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    }+
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}+
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+
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static inline bool qIsInf(float d)+
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{+
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    uchar *ch = (uchar *)&d;+
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    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {+
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        return (ch[0] & 0x7f) == 0x7f && ch[1] == 0x80;+
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    } else {+
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        return (ch[3] & 0x7f) == 0x7f && ch[2] == 0x80;+
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    }+
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}+
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+
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static inline bool qIsNaN(float d)+
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{+
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    uchar *ch = (uchar *)&d;+
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    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {+
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        return (ch[0] & 0x7f) == 0x7f && ch[1] > 0x80;+
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    } else {+
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        return (ch[3] & 0x7f) == 0x7f && ch[2] > 0x80;+
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    }+
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}+
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+
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static inline bool qIsFinite(float d)+
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{+
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    uchar *ch = (uchar *)&d;+
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    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {+
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        return (ch[0] & 0x7f) != 0x7f || (ch[1] & 0x80) != 0x80;+
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    } else {+
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        return (ch[3] & 0x7f) != 0x7f || (ch[2] & 0x80) != 0x80;+
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    }+
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}+
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+
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#endif // QNUMERIC_P_H+
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