+START_TEST(test_locale)
+{
+ char *old_locale, *saved_locale;
+
+ /* Get the the current locale. */
+ old_locale = setlocale(LC_NUMERIC, NULL);
+ fprintf(stderr, "Old locale = %s\n", old_locale);
+ /* Copy the name so it won’t be clobbered by setlocale. */
+ saved_locale = g_strdup(old_locale);
+ ck_assert(saved_locale != NULL);
+
+#ifdef _WIN32
+ /*
+ * See: https://msdn.microsoft.com/en-us/library/cc233982.aspx
+ * Doesn't work! Locale is not set!
+ */
+ setlocale(LC_NUMERIC, "de-DE");
+#else
+ /*
+ * For all *nix and OSX systems, change the locale for all threads to
+ * one that is known for not working correctly with printf(), e.g.
+ * "de_DE.UTF-8".
+ *
+ * Find all your available system locales with "locale -a".
+ */
+ setlocale(LC_NUMERIC, "de_DE.UTF-8");
+#endif
+ fprintf(stderr, "New locale = %s\n", setlocale(LC_NUMERIC, NULL));
+
+ test_sr_vsnprintf_ascii("0.1", "%.1f", (double)0.1);
+ test_sr_vsnprintf_ascii("0.12", "%.2f", (double)0.12);
+ test_sr_vsnprintf_ascii("0.123", "%.3f", (double)0.123);
+ test_sr_vsnprintf_ascii("0.1234", "%.4f", (double)0.1234);
+ test_sr_vsnprintf_ascii("0.12345", "%.5f", (double)0.12345);
+ test_sr_vsnprintf_ascii("0.123456", "%.6f", (double)0.123456);
+
+ test_sr_vsprintf_ascii("0.1", "%.1f", (double)0.1);
+ test_sr_vsprintf_ascii("0.12", "%.2f", (double)0.12);
+ test_sr_vsprintf_ascii("0.123", "%.3f", (double)0.123);
+ test_sr_vsprintf_ascii("0.1234", "%.4f", (double)0.1234);
+ test_sr_vsprintf_ascii("0.12345", "%.5f", (double)0.12345);
+ test_sr_vsprintf_ascii("0.123456", "%.6f", (double)0.123456);
+
+#if 0
+ /*
+ * These tests can be used to tell on which platforms the printf()
+ * functions are locale-dependent (i.e. these tests will fail).
+ */
+ test_vsnprintf("0.1", "%.1f", (double)0.1);
+ test_vsnprintf("0.12", "%.2f", (double)0.12);
+ test_vsnprintf("0.123", "%.3f", (double)0.123);
+ test_vsnprintf("0.1234", "%.4f", (double)0.1234);
+ test_vsnprintf("0.12345", "%.5f", (double)0.12345);
+ test_vsnprintf("0.123456", "%.6f", (double)0.123456);
+#endif
+
+ /* Restore the original locale. */
+ setlocale(LC_NUMERIC, saved_locale);
+ g_free(saved_locale);
+}
+END_TEST
+