Method SelectDefaultLanguage

src/game/localization.cpp:110–167

}

void CLocalizationDatabase::SelectDefaultLanguage(IConsole *pConsole, char *pFilename, size_t Length) const
{
	if(Languages().empty())
		return;
	if(Languages().size() == 1)
	{
		str_copy(pFilename, Languages()[0].m_Filename.c_str(), Length);
		return;
	}

	char aLocaleStr[128];
	os_locale_str(aLocaleStr, sizeof(aLocaleStr));

	log_info("localization", "Choosing default language based on user locale '%s'", aLocaleStr);

	while(true)
	{
		const CLanguage *pPrefixMatch = nullptr;
		for(const auto &Language : Languages())
		{
			for(const auto &LanguageCode : Language.m_vLanguageCodes)
			{
				if(LanguageCode == aLocaleStr)
				{
					// Exact match found, use it immediately
					str_copy(pFilename, Language.m_Filename.c_str(), Length);
					return;
				}
				else if(LanguageCode.starts_with(aLocaleStr))
				{
					// Locale is prefix of language code, e.g. locale is "en" and current language is "en-US"
					pPrefixMatch = &Language;
				}
			}
		}
		// Use prefix match if no exact match was found
		if(pPrefixMatch)
		{
			str_copy(pFilename, pPrefixMatch->m_Filename.c_str(), Length);
			return;
		}

		// Remove last segment of locale string and try again with more generic locale, e.g. "en-US" -> "en"
		int i = str_length(aLocaleStr) - 1;
		for(; i >= 0; --i)
		{
			if(aLocaleStr[i] == '-')
			{
				aLocaleStr[i] = '\0';
				break;
			}
		}

		// Stop if no more locale segments are left
		if(i <= 0)
			break;
	}
}