qtools_p.h

Go to the documentation of this file.

/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
 
#ifndef QTOOLS_P_H
#define QTOOLS_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include "QtCore/private/qglobal_p.h"
#include <limits.h>
 
QT_BEGIN_NAMESPACE
 
namespace QtMiscUtils {
constexpr inline char toHexUpper(uint value) noexcept
{
    return "0123456789ABCDEF"[value & 0xF];
}
 
constexpr inline char toHexLower(uint value) noexcept
{
    return "0123456789abcdef"[value & 0xF];
}
 
constexpr inline int fromHex(uint c) noexcept
{
    return ((c >= '0') && (c <= '9')) ? int(c - '0') :
           ((c >= 'A') && (c <= 'F')) ? int(c - 'A' + 10) :
           ((c >= 'a') && (c <= 'f')) ? int(c - 'a' + 10) :
           /* otherwise */              -1;
}
 
constexpr inline char toOct(uint value) noexcept
{
    return char('0' + (value & 0x7));
}
 
constexpr inline int fromOct(uint c) noexcept
{
    return ((c >= '0') && (c <= '7')) ? int(c - '0') : -1;
}
 
constexpr inline char toAsciiLower(char ch) noexcept
{
    return (ch >= 'A' && ch <= 'Z') ? ch - 'A' + 'a' : ch;
}
}
 
// We typically need an extra bit for qNextPowerOfTwo when determining the next allocation size.
constexpr qsizetype MaxAllocSize = (std::numeric_limits<qsizetype>::max)();
 
struct CalculateGrowingBlockSizeResult
{
    qsizetype size;
    qsizetype elementCount;
};
 
// Implemented in qarraydata.cpp:
qsizetype Q_CORE_EXPORT Q_DECL_CONST_FUNCTION
qCalculateBlockSize(qsizetype elementCount, qsizetype elementSize, qsizetype headerSize = 0) noexcept;
CalculateGrowingBlockSizeResult Q_CORE_EXPORT Q_DECL_CONST_FUNCTION
qCalculateGrowingBlockSize(qsizetype elementCount, qsizetype elementSize, qsizetype headerSize = 0) noexcept ;
 
QT_END_NAMESPACE
 
#endif // QTOOLS_P_H