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///////////////////////////////////////////////////////////////////////////////
// Name: wx/private/localeset.h
// Purpose: Define helper wxLocaleSetter class.
// Author: Vadim Zeitlin
// Created: 2021-08-03 (extracted from tests/testprec.h)
// Copyright: (c) 2021 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_PRIVATE_LOCALESET_H_
#define _WX_PRIVATE_LOCALESET_H_
#include "wx/crt.h" // wxStrdupA()
#include <locale.h>
// Helper class setting the locale to the given one for its lifetime.
class wxLocaleSetter
{
public:
wxLocaleSetter(const char *loc)
: m_locOld(wxStrdupA(setlocale(LC_ALL, NULL)))
{
setlocale(LC_ALL, loc);
}
~wxLocaleSetter()
{
setlocale(LC_ALL, m_locOld);
free(m_locOld);
}
private:
char * const m_locOld;
wxDECLARE_NO_COPY_CLASS(wxLocaleSetter);
};
// An even simpler helper for setting the locale to "C" one during its lifetime.
class wxCLocaleSetter : private wxLocaleSetter
{
public:
wxCLocaleSetter() : wxLocaleSetter("C") { }
private:
wxDECLARE_NO_COPY_CLASS(wxCLocaleSetter);
};
// This function must be called on program startup and after changing
// locale to ensure LC_CTYPE is set correctly under macOS (it does nothing
// under the other platforms currently).
inline void wxEnsureLocaleIsCompatibleWithCRT()
{
#if wxUSE_UNICODE && defined(__DARWIN__)
// In OS X and iOS, wchar_t CRT functions convert to char* and fail under
// some locales. The safest fix is to set LC_CTYPE to UTF-8 to ensure that
// they can handle any input.
//
// Note that this must be done for any app, Cocoa or console, whether or
// not it uses wxLocale.
//
// See https://stackoverflow.com/questions/11713745/why-does-the-printf-family-of-functions-care-about-locale
setlocale(LC_CTYPE, "UTF-8");
#endif // wxUSE_UNICODE && defined(__DARWIN__)
}
#endif // _WX_PRIVATE_LOCALESET_H_
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