1 files changed, 153 insertions, 0 deletions
diff --git a/tests/test-iswpunct.c b/tests/test-iswpunct.c
new file mode 100644
index 00000000..c0bbd168
--- /dev/null
+++ b/tests/test-iswpunct.c
@@ -0,0 +1,153 @@
+/* Test of iswpunct() function.
+   Copyright (C) 2020-2024 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 <wctype.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (iswpunct, int, (wint_t));
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+#include "macros.h"
+
+/* Returns the value of iswpunct for the multibyte character s[0..n-1].  */
+static int
+for_character (const char *s, size_t n)
+{
+  mbstate_t state;
+  wchar_t wc;
+  size_t ret;
+
+  memset (&state, '\0', sizeof (mbstate_t));
+  wc = (wchar_t) 0xBADFACE;
+  ret = mbrtowc (&wc, s, n, &state);
+  if (ret == n)
+    return iswpunct (wc);
+  else
+    return 0;
+}
+
+int
+main (int argc, char *argv[])
+{
+  int is;
+  char buf[4];
+
+  /* configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  /* Test WEOF.  */
+  is = iswpunct (WEOF);
+  ASSERT (is == 0);
+
+  /* Test single-byte characters.
+     POSIX specifies in
+       <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html>
+     no explicit list of punctuation or symbol 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".  */
+          buf[0] = (unsigned char) c;
+          is = for_character (buf, 1);
+          switch (c)
+            {
+            case ' ':
+            case '0': case '1': case '2': case '3': case '4':
+            case '5': case '6': case '7': case '8': case '9':
+            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 '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':
+              /* c is an alphanumeric or space character.  */
+              ASSERT (is == 0);
+              break;
+            case '!': case '"': case '#': case '%':
+            case '&': case '\'': case '(': case ')': case '*':
+            case '+': case ',': case '-': case '.': case '/':
+            case ':': case ';': case '<': case '=': case '>':
+            case '?':
+            case '[': case '\\': case ']': case '^': case '_':
+            case '{': case '|': case '}': case '~':
+              /* These characters are usually expected to be punctuation or
+                 symbol characters.  */
+              ASSERT (is != 0);
+              break;
+            default:
+              ASSERT (is == 0);
+              break;
+            }
+          break;
+        }
+  }
+
+  if (argc > 1)
+    switch (argv[1][0])
+      {
+      case '0':
+        /* C locale; tested above.  */
+        /* These characters are not in the ISO C "basic character set", but
+           are nevertheless usually expected to be punctuation or symbol
+           characters.  */
+        is = for_character ("$", 1);
+        ASSERT (is != 0);
+        is = for_character ("@", 1);
+        ASSERT (is != 0);
+        is = for_character ("`", 1);
+        ASSERT (is != 0);
+        return 0;
+      }
+
+  return 1;
+}