/******************************************************************************** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).** All rights reserved.** Contact: Nokia Corporation (qt-info@nokia.com)**** This file is part of the test suite 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 Technology Preview License Agreement accompanying** this package.**** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.**** If you have questions regarding the use of this file, please contact** Nokia at qt-info@nokia.com.****************** $QT_END_LICENSE$******************************************************************************/#ifndef QNUM_H#define QNUM_H//// W A R N I N G// -------------//// This file is not part of the Qt API. It exists purely as an// implementation detail. This header file may change from version to// version without notice, or even be removed.//// We mean it.//#include "QtCore/qglobal.h"static const unsigned char qt_be_inf_bytes[] = { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 };static const unsigned char qt_le_inf_bytes[] = { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f };static inline double qtInf(){ return *reinterpret_cast<const double *>(QSysInfo::ByteOrder == QSysInfo::BigEndian ? qt_be_inf_bytes : qt_le_inf_bytes);}#define Q_INFINITY (::qtInf())// Signaling NANstatic const unsigned char qt_be_snan_bytes[] = { 0x7f, 0xf8, 0, 0, 0, 0, 0, 0 };static const unsigned char qt_le_snan_bytes[] = { 0, 0, 0, 0, 0, 0, 0xf8, 0x7f };static inline double qtSnan(){ return *reinterpret_cast<const double *>(QSysInfo::ByteOrder == QSysInfo::BigEndian ? qt_be_snan_bytes : qt_le_snan_bytes);}#define Q_SNAN (::qtSnan())// Quiet NANstatic const unsigned char qt_be_qnan_bytes[] = { 0xff, 0xf8, 0, 0, 0, 0, 0, 0 };static const unsigned char qt_le_qnan_bytes[] = { 0, 0, 0, 0, 0, 0, 0xf8, 0xff };static inline double qtQnan(){ return *reinterpret_cast<const double *>(QSysInfo::ByteOrder == QSysInfo::BigEndian ? qt_be_qnan_bytes : qt_le_qnan_bytes);}#define Q_QNAN (::qtQnan())static inline bool qIsInf(double d){ uchar *ch = (uchar *)&d; if (QSysInfo::ByteOrder == QSysInfo::BigEndian) { return (ch[0] & 0x7f) == 0x7f && ch[1] == 0xf0; } else { return (ch[7] & 0x7f) == 0x7f && ch[6] == 0xf0; }}static inline bool qIsNaN(double d){ uchar *ch = (uchar *)&d; if (QSysInfo::ByteOrder == QSysInfo::BigEndian) { return (ch[0] & 0x7f) == 0x7f && ch[1] > 0xf0; } else { return (ch[7] & 0x7f) == 0x7f && ch[6] > 0xf0; }}static inline bool qIsFinite(double d){ uchar *ch = (uchar *)&d; if (QSysInfo::ByteOrder == QSysInfo::BigEndian) { return (ch[0] & 0x7f) != 0x7f || (ch[1] & 0xf0) != 0xf0; } else { return (ch[7] & 0x7f) != 0x7f || (ch[6] & 0xf0) != 0xf0; }}static inline bool qIsInf(float d){ uchar *ch = (uchar *)&d; if (QSysInfo::ByteOrder == QSysInfo::BigEndian) { return (ch[0] & 0x7f) == 0x7f && ch[1] == 0x80; } else { return (ch[3] & 0x7f) == 0x7f && ch[2] == 0x80; }}static inline bool qIsNaN(float d){ uchar *ch = (uchar *)&d; if (QSysInfo::ByteOrder == QSysInfo::BigEndian) { return (ch[0] & 0x7f) == 0x7f && ch[1] > 0x80; } else { return (ch[3] & 0x7f) == 0x7f && ch[2] > 0x80; }}static inline bool qIsFinite(float d){ uchar *ch = (uchar *)&d; if (QSysInfo::ByteOrder == QSysInfo::BigEndian) { return (ch[0] & 0x7f) != 0x7f || (ch[1] & 0x80) != 0x80; } else { return (ch[3] & 0x7f) != 0x7f || (ch[2] & 0x80) != 0x80; }}#endif // QNUMERIC_P_H