--- /dev/null
+/* Test of isdigit_l() function.
+ Copyright (C) 2020-2025 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/>. */
+
+#include <config.h>
+
+#include <ctype.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (isdigit_l, int, (int, locale_t));
+
+#include <locale.h>
+#include <stdio.h>
+
+#include "macros.h"
+
+static void
+test_single_locale_common (locale_t locale)
+{
+ int is;
+
+ /* Test EOF. */
+ is = isdigit_l (EOF, locale);
+ ASSERT (is == 0);
+
+ /* ISO C 99 sections 7.25.2.1.5 and 5.2.1 specify that the decimal digits
+ include only the ASCII 0 ... 9 characters. */
+ {
+ int c;
+
+ for (c = 0; c < 0x100; c++)
+ switch (c)
+ {
+ case '\t': case '\v': case '\f':
+ case ' ': case '!': case '"': case '#': case '%':
+ case '&': case '\'': case '(': case ')': case '*':
+ case '+': case ',': case '-': case '.': case '/':
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ case ':': case ';': case '<': case '=': case '>':
+ case '?':
+ case 'A': case 'B': case 'C': case 'D': case 'E':
+ case 'F': case 'G': case 'H': case 'I': case 'J':
+ case 'K': case 'L': case 'M': case 'N': case 'O':
+ case 'P': case 'Q': case 'R': case 'S': case 'T':
+ case 'U': case 'V': case 'W': case 'X': case 'Y':
+ case 'Z':
+ case '[': case '\\': case ']': case '^': case '_':
+ case 'a': case 'b': case 'c': case 'd': case 'e':
+ case 'f': case 'g': case 'h': case 'i': case 'j':
+ case 'k': case 'l': case 'm': case 'n': case 'o':
+ case 'p': case 'q': case 'r': case 's': case 't':
+ case 'u': case 'v': case 'w': case 'x': case 'y':
+ case 'z': case '{': case '|': case '}': case '~':
+ /* c is in the ISO C "basic character set". */
+ is = isdigit_l ((unsigned char) c, locale);
+ switch (c)
+ {
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ ASSERT (is != 0);
+ break;
+ default:
+ ASSERT (is == 0);
+ break;
+ }
+ break;
+ }
+ }
+}
+
+int
+main ()
+{
+ {
+ locale_t locale = newlocale (LC_ALL_MASK, "C", NULL);
+ ASSERT (locale != NULL);
+
+ test_single_locale_common (locale);
+
+ freelocale (locale);
+ }
+#if !MUSL_LIBC /* musl libc has no unibyte locales */
+ {
+# if defined _WIN32 && !defined __CYGWIN__
+ locale_t locale = newlocale (LC_ALL_MASK, "French_France.1252", NULL);
+# else
+ locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.ISO-8859-1", NULL);
+ if (locale == NULL)
+ locale = newlocale (LC_ALL_MASK, "fr_FR.ISO8859-1", NULL);
+# endif
+ if (locale != NULL)
+ {
+ test_single_locale_common (locale);
+
+ /* Locale encoding is ISO-8859-1 or ISO-8859-15. */
+ int is;
+
+ /* U+00B2 SUPERSCRIPT TWO */
+ is = isdigit_l ((unsigned char) '\262', locale);
+ ASSERT (is == 0);
+ /* U+00B3 SUPERSCRIPT THREE */
+ is = isdigit_l ((unsigned char) '\263', locale);
+ ASSERT (is == 0);
+ /* U+00B9 SUPERSCRIPT ONE */
+ is = isdigit_l ((unsigned char) '\271', locale);
+ ASSERT (is == 0);
+
+ freelocale (locale);
+ }
+ }
+#endif
+
+ return test_exit_status;
+}