/******************************************************************************** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.**** This file is part of the QtCore module of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 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 GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#ifndef QNUMERIC_P_H#define QNUMERIC_P_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