source: vbox/trunk/include/iprt/nocrt/iomanip@ 96205

/** @file
 * IPRT / No-CRT - Minimal C++ iomanip header.
 */

/*
 * Copyright (C) 2022 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.alldomusa.eu.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 */

#ifndef IPRT_INCLUDED_nocrt_iomanip
#define IPRT_INCLUDED_nocrt_iomanip
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif

#include <iprt/nocrt/ios>


namespace std
{
    /**
     * Used by all flag manipulators.
     */
    struct rtNoCrtIosSetFlagsEx
    {
        ios_base::fmtflags m_fSet;
        ios_base::fmtflags m_fMask;
    };

    template<typename a_CharType, typename a_CharTraits>
    inline basic_istream<a_CharType, a_CharTraits> &operator>>(basic_istream<a_CharType, a_CharTraits> &a_rSrc,
                                                               struct rtNoCrtIosSetFlagsEx a_Change)
    {
        a_rSrc.setf(a_Change.m_fSet, a_Change.m_fMask);
        return a_rSrc;
    }

    template<typename a_CharType, typename a_CharTraits>
    inline basic_ostream<a_CharType, a_CharTraits> &operator<<(basic_ostream<a_CharType, a_CharTraits> &a_rDst,
                                                               struct rtNoCrtIosSetFlagsEx a_Change)
    {
        a_rDst.setf(a_Change.m_fSet, a_Change.m_fMask);
        return a_rDst;
    }


    /*
     * Flag modification functions.
     */

    inline struct rtNoCrtIosSetFlagsEx setiosflags(ios_base::fmtflags a_fFlags)
    {
        struct rtNoCrtIosSetFlagsEx Ret = { a_fFlags, a_fFlags };
        return Ret;
    }

    inline struct rtNoCrtIosSetFlagsEx resetiosflags(ios_base::fmtflags a_fFlags)
    {
        struct rtNoCrtIosSetFlagsEx Ret = { ios_base::fmtflags(0), a_fFlags };
        return Ret;
    }

    inline struct rtNoCrtIosSetFlagsEx setbase(int a_iBase)
    {
        struct rtNoCrtIosSetFlagsEx Ret =
        {
              a_iBase == 10 ? ios_base::dec
            : a_iBase == 16 ? ios_base::hex
            : a_iBase == 8  ? ios_base::oct
            : ios_base::fmtflags(0),
            ios_base::basefield
        };
        return Ret;
    }

    /*
     * Modify precision.
     */
    struct rtNoCrtIosSetPrecision
    {
        int m_cchPrecision;
    };

    template<typename a_CharType, typename a_CharTraits>
    inline basic_istream<a_CharType, a_CharTraits> &operator>>(basic_istream<a_CharType, a_CharTraits> &a_rSrc,
                                                               struct rtNoCrtIosSetPrecision a_Change)
    {
        a_rSrc.precision(a_Change.m_cchPrecision);
        return a_rSrc;
    }

    template<typename a_CharType, typename a_CharTraits>
    inline basic_ostream<a_CharType, a_CharTraits> &operator<<(basic_ostream<a_CharType, a_CharTraits> &a_rDst,
                                                               struct rtNoCrtIosSetPrecision a_Change)
    {
        a_rDst.precision(a_Change.m_cchPrecision);
        return a_rDst;
    }

    inline struct rtNoCrtIosSetPrecision setprecision(int a_cchPrecision)
    {
        struct rtNoCrtIosSetPrecision Ret = { a_cchPrecision };
        return Ret;
    }

    /*
     * Modify width.
     */
    struct rtNoCrtIosSetWidth
    {
        int m_cchWidth;
    };

    template<typename a_CharType, typename a_CharTraits>
    inline basic_istream<a_CharType, a_CharTraits> &operator>>(basic_istream<a_CharType, a_CharTraits> &a_rSrc,
                                                               struct rtNoCrtIosSetWidth a_Change)
    {
        a_rSrc.width(a_Change.m_cchWidth);
        return a_rSrc;
    }

    template<typename a_CharType, typename a_CharTraits>
    inline basic_ostream<a_CharType, a_CharTraits> &operator<<(basic_ostream<a_CharType, a_CharTraits> &a_rDst,
                                                               struct rtNoCrtIosSetWidth a_Change)
    {
        a_rDst.width(a_Change.m_cchWidth);
        return a_rDst;
    }

    inline struct rtNoCrtIosSetWidth setw(int a_cchWidth)
    {
        struct rtNoCrtIosSetWidth Ret = { a_cchWidth };
        return Ret;
    }

    /** @todo setfil, get_money, set_money, get_time, set_time */
}

#endif /* !IPRT_INCLUDED_nocrt_iomanip */