1 files changed, 90 insertions, 0 deletions
diff --git a/tests/unistr/test-strncat.h b/tests/unistr/test-strncat.h
new file mode 100644
index 00000000..0445b6d9
--- /dev/null
+++ b/tests/unistr/test-strncat.h
@@ -0,0 +1,90 @@
+/* Test of uN_strncat() functions.
+   Copyright (C) 2010 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 <http://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
+
+static void
+check_single (const UNIT *input, size_t length, size_t n)
+{
+  static const UNIT base[] = { 'C', 'h', 'a', 'n', 'g', 'i', 'n', 'g', 0 };
+  size_t m;
+
+  for (m = 0; m < SIZEOF (base); m++)
+    {
+      UNIT *dest;
+      UNIT *result;
+      size_t i;
+
+      dest = (UNIT *) malloc ((1 + m + n + 2) * sizeof (UNIT));
+      ASSERT (dest != NULL);
+
+      dest[0] = MAGIC;
+      for (i = 0; i < m; i++)
+        dest[1 + i] = base[i];
+      dest[1 + m] = 0;
+      for (i = 1; i < n + 2; i++)
+        dest[1 + m + i] = MAGIC;
+
+      result = U_STRNCAT (dest + 1, input, n);
+      ASSERT (result == dest + 1);
+
+      ASSERT (dest[0] == MAGIC);
+      for (i = 0; i < m; i++)
+        ASSERT (dest[1 + i] == base[i]);
+      for (i = 0; i < (n <= length ? n : length); i++)
+        ASSERT (dest[1 + m + i] == input[i]);
+      ASSERT (dest[1 + m + i] == 0);
+      ASSERT (dest[1 + m + i + 1] == MAGIC);
+
+      free (dest);
+    }
+}
+
+static void
+check (const UNIT *input, size_t input_length)
+{
+  size_t length;
+  size_t n;
+
+  ASSERT (input_length > 0);
+  ASSERT (input[input_length - 1] == 0);
+  length = input_length - 1; /* = U_STRLEN (input) */
+
+  for (n = 0; n <= 2 * length + 2; n++)
+    check_single (input, length, n);
+
+  /* Check that U_STRNCAT (D, S, N) does not look at more than
+     MIN (U_STRLEN (S) + 1, N) units.  */
+  {
+    char *page_boundary = (char *) zerosize_ptr ();
+
+    if (page_boundary != NULL)
+      {
+        for (n = 0; n <= 2 * length + 2; n++)
+          {
+            size_t n_to_copy = (n <= length ? n : length + 1);
+            UNIT *copy;
+            size_t i;
+
+            copy = (UNIT *) page_boundary - n_to_copy;
+            for (i = 0; i < n_to_copy; i++)
+              copy[i] = input[i];
+
+            check_single (copy, length, n);
+          }
+      }
+  }
+}