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117 lines
4.3 KiB
117 lines
4.3 KiB
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 1992-2021 KiCad Developers, see AUTHORS.txt for contributors.
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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
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* as published by the Free Software Foundation; either version 2
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* of 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, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <locale_io.h>
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#include <wx/intl.h>
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#include <clocale>
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// When reading/writing files, we need to swtich to setlocale( LC_NUMERIC, "C" ).
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// Works fine to read/write files with floating point numbers.
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// We can call setlocale( LC_NUMERIC, "C" ) or wxLocale( "C", "C", "C", false )
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// wxWidgets discourage a direct call to setlocale
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// However, for us, calling wxLocale( "C", "C", "C", false ) has a unwanted effect:
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// The I18N translations are no longer active, because the English dictionary is selected.
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// To read files, this is not a major issues, but the resul can differ
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// from using setlocale(xx, "C").
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// Previouly, we used only setlocale( LC_NUMERIC, "C" )
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//
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// Known issues are
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// on MSW
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// using setlocale( LC_NUMERIC, "C" ) generates an alert message in debug mode,
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// and this message ("Decimal separator mismatch") must be disabled.
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// But calling wxLocale( "C", "C", "C", false ) works fine
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// On unix:
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// calling wxLocale( "C", "C", "C", false ) breaks env vars containing non ASCII7 chars.
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// these env vars return a empty string from wxGetEnv() in many cases, and if such a
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// var must be read after calling wxLocale( "C", "C", "C", false ), it looks like empty
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//
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// So use wxLocale on Windows and setlocale on unix
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// set USE_WXLOCALE 0 to use setlocale, 1 to use wxLocale:
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#if defined( _WIN32 )
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#define USE_WXLOCALE 1
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#else
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#define USE_WXLOCALE 0
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#endif
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// On Windows, when using setlocale, a wx alert is generated
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// in some cases (reading a bitmap for instance)
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// So we disable alerts during the time a file is read or written
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#if !USE_WXLOCALE
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#if defined( _WIN32 ) && defined( DEBUG )
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// a wxAssertHandler_t function to filter wxWidgets alert messages when reading/writing a file
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// when switching the locale to LC_NUMERIC, "C"
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// It is used in class LOCALE_IO to hide a useless (in kicad) wxWidgets alert message
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void KiAssertFilter( const wxString &file, int line,
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const wxString &func, const wxString &cond,
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const wxString &msg)
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{
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if( !msg.Contains( "Decimal separator mismatch" ) )
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wxTheApp->OnAssertFailure( file.c_str(), line, func.c_str(), cond.c_str(), msg.c_str() );
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}
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#endif
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#endif
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std::atomic<unsigned int> LOCALE_IO::m_c_count( 0 );
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LOCALE_IO::LOCALE_IO() : m_wxLocale( nullptr )
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{
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// use thread safe, atomic operation
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if( m_c_count++ == 0 )
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{
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#if USE_WXLOCALE
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#define C_LANG "C"
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m_wxLocale = new wxLocale( C_LANG, C_LANG, C_LANG, false );
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#else
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// Store the user locale name, to restore this locale later, in dtor
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m_user_locale = setlocale( LC_NUMERIC, nullptr );
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#if defined( _WIN32 ) && defined( DEBUG )
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// Disable wxWidgets alerts
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wxSetAssertHandler( KiAssertFilter );
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#endif
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// Switch the locale to C locale, to read/write files with fp numbers
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setlocale( LC_NUMERIC, "C" );
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#endif
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}
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}
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LOCALE_IO::~LOCALE_IO()
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{
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// use thread safe, atomic operation
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if( --m_c_count == 0 )
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{
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// revert to the user locale
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#if USE_WXLOCALE
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delete m_wxLocale; // Deleting m_wxLocale restored previous locale
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m_wxLocale = nullptr;
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#else
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setlocale( LC_NUMERIC, m_user_locale.c_str() );
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#if defined( _WIN32 ) && defined( DEBUG )
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// Enable wxWidgets alerts
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wxSetDefaultAssertHandler();
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#endif
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#endif
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}
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}
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