Add wx headers and ext

wxheaders/wx/private/localeset.h

@@ -0,0 +1,49 @@
+///////////////////////////////////////////////////////////////////////////////
+// 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);
+};
+
+#endif // _WX_PRIVATE_LOCALESET_H_