f9f395c28b
Updated version of LGPL and FDL licenseheaders. Apply release phase licenseheaders for all source files. Reviewed-by: Trust Me
146 lines
4.6 KiB
C
146 lines
4.6 KiB
C
/****************************************************************************
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**
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** Copyright (C) 2011 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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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** 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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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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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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// 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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#include "QtCore/qglobal.h"
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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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// 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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// 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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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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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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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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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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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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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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#endif // QNUMERIC_P_H
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