common/include/QtCore/5.5.0/QtCore/private/qtools_p.h

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#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/qglobal.h"
#include <limits>

QT_BEGIN_NAMESPACE

namespace QtMiscUtils {
Q_DECL_CONSTEXPR inline char toHexUpper(uint value) Q_DECL_NOTHROW
{
    return "0123456789ABCDEF"[value & 0xF];
}

Q_DECL_CONSTEXPR inline char toHexLower(uint value) Q_DECL_NOTHROW
{
    return "0123456789abcdef"[value & 0xF];
}

Q_DECL_CONSTEXPR inline int fromHex(uint c) Q_DECL_NOTHROW
{
    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;
}

Q_DECL_CONSTEXPR inline char toOct(uint value) Q_DECL_NOTHROW
{
    return '0' + char(value & 0x7);
}

Q_DECL_CONSTEXPR inline int fromOct(uint c) Q_DECL_NOTHROW
{
    return ((c >= '0') && (c <= '7')) ? int(c - '0') : -1;
}
}

// We typically need an extra bit for qNextPowerOfTwo when determining the next allocation size.
enum {
    MaxAllocSize = (1 << (std::numeric_limits<int>::digits - 1)) - 1
};

// implemented in qbytearray.cpp
int Q_CORE_EXPORT qAllocMore(int alloc, int extra) Q_DECL_NOTHROW;

QT_END_NAMESPACE

#endif // QTOOLS_P_H