STL/stl/inc/xlocmes

// xlocmes internal header

// Copyright (c) Microsoft Corporation.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

#pragma once
#ifndef _XLOCMES_
#define _XLOCMES_
#include <yvals_core.h>
#if _STL_COMPILER_PREPROCESSOR
#include <xiosbase>

#pragma pack(push, _CRT_PACKING)
#pragma warning(push, _STL_WARNING_LEVEL)
#pragma warning(disable : _STL_DISABLED_WARNINGS)
_STL_DISABLE_CLANG_WARNINGS
#pragma push_macro("new")
#undef new

_STD_BEGIN
struct messages_base : locale::facet { // base class for messages
    using catalog = int;

    explicit messages_base(size_t _Refs = 0) : locale::facet(_Refs) {}
};

template <class _Elem>
class messages : public messages_base { // facet for obtaining messages from a catalog
public:
    static_assert(!_ENFORCE_FACET_SPECIALIZATIONS || _Is_any_of_v<_Elem, char, wchar_t>, _FACET_SPECIALIZATION_MESSAGE);

    using char_type   = _Elem;
    using string_type = basic_string<_Elem, char_traits<_Elem>, allocator<_Elem>>;

    catalog open(const string& _Catname, const locale& _Loc) const { // open catalog
        return do_open(_Catname, _Loc);
    }

    string_type get(catalog _Catval, int _Set, int _Message,
        const string_type& _Dflt) const { // get message from set in catalog
        return do_get(_Catval, _Set, _Message, _Dflt);
    }

    void close(catalog _Catval) const { // close catalog
        do_close(_Catval);
    }

    __PURE_APPDOMAIN_GLOBAL _CRTIMP2_PURE_IMPORT static locale::id id; // unique facet id

    explicit messages(size_t _Refs = 0) : messages_base(_Refs) { // construct from current locale
        _BEGIN_LOCINFO(_Lobj)
        _Init(_Lobj);
        _END_LOCINFO()
    }

    messages(const _Locinfo& _Lobj, size_t _Refs = 0) : messages_base(_Refs) {
        _Init(_Lobj);
    }

    static size_t _Getcat(const locale::facet** _Ppf = nullptr, const locale* _Ploc = nullptr) {
        // return locale category mask and construct standard facet
        if (_Ppf && !*_Ppf) {
            *_Ppf = new messages<_Elem>(_Locinfo(_Ploc->_C_str()));
        }

        return _X_MESSAGES;
    }

protected:
    messages(const char* _Locname, size_t _Refs = 0) : messages_base(_Refs) {
        _BEGIN_LOCINFO(_Lobj(_Locname))
        _Init(_Lobj);
        _END_LOCINFO()
    }

    __CLR_OR_THIS_CALL ~messages() noexcept override {}

    void _Init(const _Locinfo&) {} // initialize from _Locinfo object (do nothing)

    virtual catalog __CLR_OR_THIS_CALL do_open(const string&, const locale&) const { // open catalog (do nothing)
        return -1;
    }

    virtual string_type __CLR_OR_THIS_CALL do_get(catalog, int, int,
        const string_type& _Dflt) const { // get message from set in catalog (return default)
        return _Dflt;
    }

    virtual void __CLR_OR_THIS_CALL do_close(catalog) const {} // close catalog (do nothing)
};

#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdllimport-static-field-def"
#endif // __clang__

template <class _Elem>
__PURE_APPDOMAIN_GLOBAL locale::id messages<_Elem>::id;

#ifdef __clang__
#pragma clang diagnostic pop
#endif // __clang__

template <class _Elem>
class messages_byname : public messages<_Elem> { // messages for named locale
public:
    static_assert(!_ENFORCE_FACET_SPECIALIZATIONS || _Is_any_of_v<_Elem, char, wchar_t>, _FACET_SPECIALIZATION_MESSAGE);

    explicit messages_byname(const char* _Locname, size_t _Refs = 0)
        : messages<_Elem>(_Locname, _Refs) {} // construct for named locale

    explicit messages_byname(const string& _Str, size_t _Refs = 0)
        : messages<_Elem>(_Str.c_str(), _Refs) {} // construct for named locale

protected:
    __CLR_OR_THIS_CALL ~messages_byname() noexcept override {}
};

#if defined(_DLL_CPPLIB)

#if !defined(_CRTBLD) || defined(__FORCE_INSTANCE)
template __PURE_APPDOMAIN_GLOBAL locale::id messages<char>::id;
template __PURE_APPDOMAIN_GLOBAL locale::id messages<wchar_t>::id;
#endif // !defined(_CRTBLD) || defined(__FORCE_INSTANCE)

#ifdef __FORCE_INSTANCE
template __PURE_APPDOMAIN_GLOBAL locale::id messages<unsigned short>::id;
#endif // __FORCE_INSTANCE
#endif // defined(_DLL_CPPLIB)
_STD_END
#pragma pop_macro("new")
_STL_RESTORE_CLANG_WARNINGS
#pragma warning(pop)
#pragma pack(pop)
#endif // _STL_COMPILER_PREPROCESSOR
#endif // _XLOCMES_