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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 243 insertions, 0 deletions

diff --git a/src/corelib/global/qnumeric_p.h b/src/corelib/global/qnumeric_p.h
new file mode 100644
index 0000000000..d4aa6587f3
--- /dev/null
+++ b/src/corelib/global/qnumeric_p.h
@@ -0,0 +1,243 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module 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 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"
+
+QT_BEGIN_NAMESPACE
+
+#if !defined(Q_CC_MIPS)
+
+static const union { unsigned char c[8]; double d; } qt_be_inf_bytes = { { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 } };
+static const union { unsigned char c[8]; double d; } qt_le_inf_bytes = { { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } };
+static const union { unsigned char c[8]; double d; } qt_armfpa_inf_bytes = { { 0, 0, 0xf0, 0x7f, 0, 0, 0, 0 } };
+static inline double qt_inf()
+{
+#ifdef QT_ARMFPA
+    return qt_armfpa_inf_bytes.d;
+#else
+    return (QSysInfo::ByteOrder == QSysInfo::BigEndian
+            ? qt_be_inf_bytes.d
+            : qt_le_inf_bytes.d);
+#endif
+}
+
+// Signaling NAN
+static const union { unsigned char c[8]; double d; } qt_be_snan_bytes = { { 0x7f, 0xf8, 0, 0, 0, 0, 0, 0 } };
+static const union { unsigned char c[8]; double d; } qt_le_snan_bytes = { { 0, 0, 0, 0, 0, 0, 0xf8, 0x7f } };
+static const union { unsigned char c[8]; double d; } qt_armfpa_snan_bytes = { { 0, 0, 0xf8, 0x7f, 0, 0, 0, 0 } };
+static inline double qt_snan()
+{
+#ifdef QT_ARMFPA
+    return qt_armfpa_snan_bytes.d;
+#else
+    return (QSysInfo::ByteOrder == QSysInfo::BigEndian
+            ? qt_be_snan_bytes.d
+            : qt_le_snan_bytes.d);
+#endif
+}
+
+// Quiet NAN
+static const union { unsigned char c[8]; double d; } qt_be_qnan_bytes = { { 0xff, 0xf8, 0, 0, 0, 0, 0, 0 } };
+static const union { unsigned char c[8]; double d; } qt_le_qnan_bytes = { { 0, 0, 0, 0, 0, 0, 0xf8, 0xff } };
+static const union { unsigned char c[8]; double d; } qt_armfpa_qnan_bytes = { { 0, 0, 0xf8, 0xff, 0, 0, 0, 0 } };
+static inline double qt_qnan()
+{
+#ifdef QT_ARMFPA
+    return qt_armfpa_qnan_bytes.d;
+#else
+    return (QSysInfo::ByteOrder == QSysInfo::BigEndian
+            ? qt_be_qnan_bytes.d
+            : qt_le_qnan_bytes.d);
+#endif
+}
+
+#else // Q_CC_MIPS
+
+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 const unsigned char qt_armfpa_inf_bytes[] = { 0, 0, 0xf0, 0x7f, 0, 0, 0, 0 };
+static inline double qt_inf()
+{
+    const unsigned char *bytes;
+#ifdef QT_ARMFPA
+    bytes = qt_armfpa_inf_bytes;
+#else
+    bytes = (QSysInfo::ByteOrder == QSysInfo::BigEndian
+             ? qt_be_inf_bytes
+             : qt_le_inf_bytes);
+#endif
+
+    union { unsigned char c[8]; double d; } returnValue;
+    qMemCopy(returnValue.c, bytes, sizeof(returnValue.c));
+    return returnValue.d;
+}
+
+// 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 const unsigned char qt_armfpa_snan_bytes[] = { 0, 0, 0xf8, 0x7f, 0, 0, 0, 0 };
+static inline double qt_snan()
+{
+    const unsigned char *bytes;
+#ifdef QT_ARMFPA
+    bytes = qt_armfpa_snan_bytes;
+#else
+    bytes = (QSysInfo::ByteOrder == QSysInfo::BigEndian
+             ? qt_be_snan_bytes
+             : qt_le_snan_bytes);
+#endif
+
+    union { unsigned char c[8]; double d; } returnValue;
+    qMemCopy(returnValue.c, bytes, sizeof(returnValue.c));
+    return returnValue.d;
+}
+
+// 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 const unsigned char qt_armfpa_qnan_bytes[] = { 0, 0, 0xf8, 0xff, 0, 0, 0, 0 };
+static inline double qt_qnan()
+{
+    const unsigned char *bytes;
+#ifdef QT_ARMFPA
+    bytes = qt_armfpa_qnan_bytes;
+#else
+    bytes = (QSysInfo::ByteOrder == QSysInfo::BigEndian
+             ? qt_be_qnan_bytes
+             : qt_le_qnan_bytes);
+#endif
+
+    union { unsigned char c[8]; double d; } returnValue;
+    qMemCopy(returnValue.c, bytes, sizeof(returnValue.c));
+    return returnValue.d;
+}
+
+#endif // Q_CC_MIPS
+
+static inline bool qt_is_inf(double d)
+{
+    uchar *ch = (uchar *)&d;
+#ifdef QT_ARMFPA
+    return (ch[3] & 0x7f) == 0x7f && ch[2] == 0xf0;
+#else
+    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+        return (ch[0] & 0x7f) == 0x7f && ch[1] == 0xf0;
+    } else {
+        return (ch[7] & 0x7f) == 0x7f && ch[6] == 0xf0;
+    }
+#endif
+}
+
+static inline bool qt_is_nan(double d)
+{
+    uchar *ch = (uchar *)&d;
+#ifdef QT_ARMFPA
+    return (ch[3] & 0x7f) == 0x7f && ch[2] > 0xf0;
+#else
+    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+        return (ch[0] & 0x7f) == 0x7f && ch[1] > 0xf0;
+    } else {
+        return (ch[7] & 0x7f) == 0x7f && ch[6] > 0xf0;
+    }
+#endif
+}
+
+static inline bool qt_is_finite(double d)
+{
+    uchar *ch = (uchar *)&d;
+#ifdef QT_ARMFPA
+    return (ch[3] & 0x7f) != 0x7f || (ch[2] & 0xf0) != 0xf0;
+#else
+    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+        return (ch[0] & 0x7f) != 0x7f || (ch[1] & 0xf0) != 0xf0;
+    } else {
+        return (ch[7] & 0x7f) != 0x7f || (ch[6] & 0xf0) != 0xf0;
+    }
+#endif
+}
+
+static inline bool qt_is_inf(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 qt_is_nan(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 qt_is_finite(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;
+    }
+}
+
+QT_END_NAMESPACE
+
+#endif // QNUMERIC_P_H