LanguageInfo.hxx

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// SPDX-FileCopyrightText: 2025 Florent Rougon
// SPDX-License-Identifier: GPL-2.0-or-later

 
#pragma once
 
#include <functional>
#include <map>
#include <string>
#include <type_traits>
 
namespace flightgear
{

 
class LanguageInfo
{
public:
    using intType = long long;

    static std::size_t getNumberOfPluralForms(const std::string& languageId);
    static std::size_t getPluralFormIndex(const std::string& languageId,
                                          intType number);
 
private:
    // Important: std::abs(i) is not UB and fits in an uintType as long as i
    // has type intType.
    using uintType = std::make_unsigned_t<intType>;
 
    static const std::map<std::string, std::size_t> nbPluralFormsMap;
 
    using funcType = std::function<std::size_t(uintType)>;
    static const std::map<std::string, funcType> pluralFormIndexFuncMap;
 
    static std::size_t pluralFormIndex_EngineeringEnglishStyle(uintType n);
    static std::size_t pluralFormIndex_EnglishStyle(uintType n);
    static std::size_t pluralFormIndex_FrenchStyle(uintType n);
    static std::size_t pluralFormIndex_PolishStyle(uintType n);
    static std::size_t pluralFormIndex_RussianStyle(uintType n);
};
 
}