1 files changed, 85 insertions, 0 deletions
diff --git a/tests/locale.c b/tests/locale.c
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index 00000000..67578d28
--- /dev/null
+++ b/tests/locale.c
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+/* Program that prints the names of the categories of the current locale.
+   Copyright (C) 2019-2022 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/* We want to use the system's setlocale() function here, not the gnulib
+   override.  */
+#undef setlocale
+
+/* Specification:
+   <https://pubs.opengroup.org/onlinepubs/9699919799/utilities/locale.html>
+   Here we implement only the invocation without any command-line options.  */
+
+static const char *
+defaulted_getenv (const char *variable)
+{
+  const char *value = getenv (variable);
+  return (value != NULL ? value : "");
+}
+
+static void
+print_category (int category, const char *variable)
+{
+  const char *value = defaulted_getenv (variable);
+  if (value[0] != '\0' && defaulted_getenv ("LC_ALL")[0] == '\0')
+    /* The variable is set in the environment and not overridden by LC_ALL.  */
+    printf ("%s=%s\n", variable, value);
+  else
+    printf ("%s=\"%s\"\n", variable, setlocale (category, NULL));
+}
+
+int
+main (void)
+{
+  setlocale (LC_ALL, "");
+
+  printf ("LANG=%s\n", defaulted_getenv ("LANG"));
+  print_category (LC_CTYPE, "LC_CTYPE");
+  print_category (LC_NUMERIC, "LC_NUMERIC");
+  print_category (LC_TIME, "LC_TIME");
+  print_category (LC_COLLATE, "LC_COLLATE");
+  print_category (LC_MONETARY, "LC_MONETARY");
+  print_category (LC_MESSAGES, "LC_MESSAGES");
+#ifdef LC_PAPER
+  print_category (LC_PAPER, "LC_PAPER");
+#endif
+#ifdef LC_NAME
+  print_category (LC_NAME, "LC_NAME");
+#endif
+#ifdef LC_ADDRESS
+  print_category (LC_ADDRESS, "LC_ADDRESS");
+#endif
+#ifdef LC_TELEPHONE
+  print_category (LC_TELEPHONE, "LC_TELEPHONE");
+#endif
+#ifdef LC_MEASUREMENT
+  print_category (LC_MEASUREMENT, "LC_MEASUREMENT");
+#endif
+#ifdef LC_IDENTIFICATION
+  print_category (LC_IDENTIFICATION, "LC_IDENTIFICATION");
+#endif
+
+  printf ("LC_ALL=%s\n", defaulted_getenv ("LC_ALL"));
+
+  return 0;
+}