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Diffstat (limited to 'tests/auto/qtessellator/qnum.h')
| -rw-r--r-- | tests/auto/qtessellator/qnum.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/tests/auto/qtessellator/qnum.h b/tests/auto/qtessellator/qnum.h new file mode 100644 index 0000000..03158c5 --- /dev/null +++ b/tests/auto/qtessellator/qnum.h @@ -0,0 +1,145 @@ +/**************************************************************************** +** +** 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 |