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75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
/********************************************************************\
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* gnc-locale-utils.cpp -- provide a default locale for C++ *
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* Copyright (C) 2019 John Ralls <jralls@ceridwen.us *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 2 of *
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* the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License*
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* along with this program; if not, contact: *
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* *
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* Free Software Foundation Voice: +1-617-542-5942 *
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* 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652 *
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* Boston, MA 02110-1301, USA gnu@gnu.org *
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\********************************************************************/
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extern "C"
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{
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#include <glib.h>
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}
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#include <clocale>
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#include <boost/locale.hpp>
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#include "gnc-locale-utils.hpp"
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/** Cache the UI locale
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*
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* We don't want to set the default locale because we need
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* std::locale::classic for consistency in stored data. We also don't
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* want to call std::locale("") more than once, it's slow... and we
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* don't want to call it on MinGW32 at all because that supports only
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* std::locale::classic and throws if you try to construct anything
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* else. Boost::locale doesn't support std::locale::facet required by
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* boost::datetime (go figure).
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*
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* @return a copy of std::locale::classic() on MinGW32 and a copy of
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* the cached result of std::locale("") otherwise.
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*/
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const std::locale&
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gnc_get_locale()
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{
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#ifdef __MINGW32__
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return std::locale::classic(); // Nothing else supported.
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#else
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static std::locale cached;
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static bool tried_already = false;
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if (!tried_already)
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{
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tried_already = true;
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try
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{
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cached = std::locale("");
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}
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catch (const std::runtime_error& err)
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{
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char* locale = g_strdup(setlocale(LC_ALL, ""));
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g_log(G_LOG_DOMAIN, G_LOG_LEVEL_WARNING,
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"Failed to create C++ default locale from"
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"%s because %s. Using the 'C' locale for C++.",
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locale, err.what());
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g_free(locale);
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cached = std::locale::classic();
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}
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}
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return cached;
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#endif
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}
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