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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#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 NAN
+static 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 NAN
+static 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