New upstream version 1.2upstream/1.2

135 files changed, 424 insertions, 152 deletions

diff --git a/tests/unistr/test-chr.h b/tests/unistr/test-chr.h
index f8f87015..f7bfc2ba 100644
--- a/tests/unistr/test-chr.h
+++ b/tests/unistr/test-chr.h
@@ -1,5 +1,5 @@
 /* Test of uN_chr() functions.
-   Copyright (C) 2008-2022 Free Software Foundation, Inc.
+   Copyright (C) 2008-2024 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
@@ -20,7 +20,6 @@ int
 main (void)
 {
   size_t size = 0x100000;
-  size_t i;
   size_t length;
   UNIT *input;
   uint32_t *input32 = (uint32_t *) malloc (size * sizeof (uint32_t));
@@ -29,7 +28,7 @@ main (void)
   input32[0] = 'a';
   input32[1] = 'b';
   u32_set (input32 + 2, 'c', 1024);
-  for (i = 1026; i < size - 2; i += 63)
+  for (size_t i = 1026; i < size - 2; i += 63)
     {
       size_t last = i + 63 < size - 2 ? i + 63 : size - 2;
       ucs4_t uc = 'd' | (i - 1026);
@@ -48,9 +47,11 @@ main (void)
   ASSERT (U_CHR (input, length, 'a') == input);
 
   ASSERT (U_CHR (input, 0, 'a') == NULL);
-  void *page_boundary = zerosize_ptr ();
-  if (page_boundary)
-    ASSERT (U_CHR (page_boundary, 0, 'a') == NULL);
+  {
+    void *page_boundary = zerosize_ptr ();
+    if (page_boundary != NULL)
+      ASSERT (U_CHR (page_boundary, 0, 'a') == NULL);
+  }
 
   ASSERT (U_CHR (input, length, 'b') == input + 1);
   ASSERT (U_CHR (input, length, 'c') == input + 2);
@@ -59,7 +60,7 @@ main (void)
   {
     UNIT *exp = input + 1026;
     UNIT *prev = input + 1;
-    for (i = 1026; i < size - 2; i += 63)
+    for (size_t i = 1026; i < size - 2; i += 63)
       {
         UNIT c[6];
         size_t n;
@@ -108,14 +109,14 @@ main (void)
   /* Check that uN_chr() does not read past the first occurrence of the
      byte being searched.  */
   {
-    char *page_boundary = (char *) zerosize_ptr ();
+    UNIT *page_boundary = zerosize_ptr ();
     size_t n;
 
     if (page_boundary != NULL)
       {
         for (n = 1; n <= 500 / sizeof (UNIT); n++)
           {
-            UNIT *mem = (UNIT *) (page_boundary - n * sizeof (UNIT));
+            UNIT *mem = page_boundary - n;
             U_SET (mem, 'X', n);
             ASSERT (U_CHR (mem, n, 'U') == NULL);
 
diff --git a/tests/unistr/test-cmp.h b/tests/unistr/test-cmp.h
index c7c92434..3eb1be32 100644
--- a/tests/unistr/test-cmp.h
+++ b/tests/unistr/test-cmp.h
@@ -1,5 +1,5 @@
 /* Test of uN_cmp() functions.
-   Copyright (C) 2008-2022 Free Software Foundation, Inc.
+   Copyright (C) 2008-2024 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
diff --git a/tests/unistr/test-cmp2.h b/tests/unistr/test-cmp2.h
index 8fe88c54..3b9f7568 100644
--- a/tests/unistr/test-cmp2.h
+++ b/tests/unistr/test-cmp2.h
@@ -1,5 +1,5 @@
 /* Test of uN_cmp2() functions.
-   Copyright (C) 2008-2022 Free Software Foundation, Inc.
+   Copyright (C) 2008-2024 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
diff --git a/tests/unistr/test-cpy-alloc.h b/tests/unistr/test-cpy-alloc.h
index 5fa46a74..37b07350 100644
--- a/tests/unistr/test-cpy-alloc.h
+++ b/tests/unistr/test-cpy-alloc.h
@@ -1,5 +1,5 @@
 /* Test of uN_cpy_alloc() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-cpy.h b/tests/unistr/test-cpy.h
index 12379bb2..05f1f5a8 100644
--- a/tests/unistr/test-cpy.h
+++ b/tests/unistr/test-cpy.h
@@ -1,5 +1,5 @@
 /* Test of uN_cpy() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-move.h b/tests/unistr/test-move.h
index fd13b4cc..80784937 100644
--- a/tests/unistr/test-move.h
+++ b/tests/unistr/test-move.h
@@ -1,5 +1,5 @@
 /* Test of uN_move() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-pcpy.h b/tests/unistr/test-pcpy.h
new file mode 100644
index 00000000..92ae0d0e
--- /dev/null
+++ b/tests/unistr/test-pcpy.h
@@ -0,0 +1,44 @@
+/* Test of uN_pcpy() functions.
+   Copyright (C) 2010-2024 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/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2023.  */
+
+int
+main ()
+{
+  /* Test small copying operations.  */
+  {
+    static const UNIT src[] = { 'c', 'l', 'i', 'm', 'a', 't', 'e' };
+    size_t n;
+
+    for (n = 0; n <= SIZEOF (src); n++)
+      {
+        UNIT dest[1 + SIZEOF (src) + 1] =
+          { MAGIC, MAGIC, MAGIC, MAGIC, MAGIC, MAGIC, MAGIC, MAGIC, MAGIC };
+        UNIT *ret;
+        size_t i;
+
+        ret = U_PCPY (dest + 1, src, n);
+        ASSERT (ret == dest + 1 + n);
+        ASSERT (dest[0] == MAGIC);
+        for (i = 0; i < n; i++)
+          ASSERT (dest[1 + i] == src[i]);
+        ASSERT (dest[1 + n] == MAGIC);
+      }
+  }
+
+  return 0;
+}
diff --git a/tests/unistr/test-set.h b/tests/unistr/test-set.h
index 24330260..c1966675 100644
--- a/tests/unistr/test-set.h
+++ b/tests/unistr/test-set.h
@@ -1,5 +1,5 @@
 /* Test of uN_set() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-stpcpy.h b/tests/unistr/test-stpcpy.h
index 5b1d6615..e3fe8e5b 100644
--- a/tests/unistr/test-stpcpy.h
+++ b/tests/unistr/test-stpcpy.h
@@ -1,5 +1,5 @@
 /* Test of uN_stpcpy() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-stpncpy.h b/tests/unistr/test-stpncpy.h
index 34503bd2..3fc03d51 100644
--- a/tests/unistr/test-stpncpy.h
+++ b/tests/unistr/test-stpncpy.h
@@ -1,5 +1,5 @@
 /* Test of uN_stpncpy() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-strcat.h b/tests/unistr/test-strcat.h
index 906528ff..12440c43 100644
--- a/tests/unistr/test-strcat.h
+++ b/tests/unistr/test-strcat.h
@@ -1,5 +1,5 @@
 /* Test of uN_strcat() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-strchr.h b/tests/unistr/test-strchr.h
index 52768a4b..ad102c2e 100644
--- a/tests/unistr/test-strchr.h
+++ b/tests/unistr/test-strchr.h
@@ -1,5 +1,5 @@
 /* Test of uN_strchr() functions.
-   Copyright (C) 2008-2022 Free Software Foundation, Inc.
+   Copyright (C) 2008-2024 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
@@ -22,7 +22,6 @@ test_strchr (void)
 {
   size_t size = 0x100000;
   size_t length;
-  size_t i;
   UNIT *input;
   uint32_t *input32 = (uint32_t *) malloc ((size + 1) * sizeof (uint32_t));
   ASSERT (input32);
@@ -30,7 +29,7 @@ test_strchr (void)
   input32[0] = 'a';
   input32[1] = 'b';
   u32_set (input32 + 2, 'c', 1024);
-  for (i = 1026; i < size - 2; i += 63)
+  for (size_t i = 1026; i < size - 2; i += 63)
     {
       size_t last = i + 63 < size - 2 ? i + 63 : size - 2;
       ucs4_t uc = 'd' | (i - 1026);
@@ -54,7 +53,7 @@ test_strchr (void)
     UNIT *exp = input + 1026;
     UNIT *prev = input + 2;
 
-    for (i = 1026; i < size - 2; i += 63)
+    for (size_t i = 1026; i < size - 2; i += 63)
       {
         UNIT c[6];
         size_t n;
diff --git a/tests/unistr/test-strcmp.h b/tests/unistr/test-strcmp.h
index aeba3549..ea8c1321 100644
--- a/tests/unistr/test-strcmp.h
+++ b/tests/unistr/test-strcmp.h
@@ -1,5 +1,5 @@
 /* Test of uN_strcmp() and uN_strcoll() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-strcpy.h b/tests/unistr/test-strcpy.h
index 1f145032..9ff1f992 100644
--- a/tests/unistr/test-strcpy.h
+++ b/tests/unistr/test-strcpy.h
@@ -1,5 +1,5 @@
 /* Test of uN_strcpy() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-strdup.h b/tests/unistr/test-strdup.h
index 298a0459..af19c4d6 100644
--- a/tests/unistr/test-strdup.h
+++ b/tests/unistr/test-strdup.h
@@ -1,5 +1,5 @@
 /* Test of uN_strdup() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-strncat.h b/tests/unistr/test-strncat.h
index c66583ec..c505fc26 100644
--- a/tests/unistr/test-strncat.h
+++ b/tests/unistr/test-strncat.h
@@ -1,5 +1,5 @@
 /* Test of uN_strncat() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-strncmp.h b/tests/unistr/test-strncmp.h
index 8fdc4d99..64fecebb 100644
--- a/tests/unistr/test-strncmp.h
+++ b/tests/unistr/test-strncmp.h
@@ -1,5 +1,5 @@
 /* Test of uN_strncmp() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-strncpy.h b/tests/unistr/test-strncpy.h
index f2774fb0..c3ad19c6 100644
--- a/tests/unistr/test-strncpy.h
+++ b/tests/unistr/test-strncpy.h
@@ -1,5 +1,5 @@
 /* Test of uN_strncpy() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-strnlen.h b/tests/unistr/test-strnlen.h
index ba3c0cfd..abc83fb9 100644
--- a/tests/unistr/test-strnlen.h
+++ b/tests/unistr/test-strnlen.h
@@ -1,5 +1,5 @@
 /* Test of uN_strnlen() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u-strstr.h b/tests/unistr/test-u-strstr.h
index d53183e1..36783cdf 100644
--- a/tests/unistr/test-u-strstr.h
+++ b/tests/unistr/test-u-strstr.h
@@ -1,5 +1,5 @@
 /* Test of uN_strstr() functions.
-   Copyright (C) 2004, 2007-2022 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2007-2024 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
@@ -207,4 +207,42 @@ test_u_strstr (void)
     free (needle);
     free (haystack);
   }
+
+  /* Test case from Yves Bastide.
+     <https://www.openwall.com/lists/musl/2014/04/18/2>  */
+  {
+    const UNIT input[] =
+      { 'p', 'l', 'a', 'y', 'i', 'n', 'g', ' ', 'p', 'l', 'a', 'y', ' ', 'p',
+        'l', 'a', 'y', ' ', 'p', 'l', 'a', 'y', ' ', 'a', 'l', 'w', 'a', 'y',
+        's', 0
+      };
+    const UNIT needle[] =
+      { 'p', 'l', 'a', 'y', ' ', 'p', 'l', 'a', 'y', ' ', 'p', 'l', 'a', 'y',
+        0
+      };
+    const UNIT *result = U_STRSTR (input, needle);
+    ASSERT (result == input + 8);
+  }
+
+  /* Test long needles.  */
+  {
+    size_t m = 1024;
+    UNIT *haystack = (UNIT *) malloc ((2 * m + 1) * sizeof (UNIT));
+    UNIT *needle = (UNIT *) malloc ((m + 1) * sizeof (UNIT));
+    if (haystack != NULL && needle != NULL)
+      {
+        const UNIT *p;
+        haystack[0] = 'x';
+        U_SET (haystack + 1, ' ', m - 1);
+        U_SET (haystack + m, 'x', m);
+        haystack[2 * m] = '\0';
+        U_SET (needle, 'x', m);
+        needle[m] = '\0';
+        p = U_STRSTR (haystack, needle);
+        ASSERT (p);
+        ASSERT (p - haystack == m);
+      }
+    free (needle);
+    free (haystack);
+  }
 }
diff --git a/tests/unistr/test-u-strtok.h b/tests/unistr/test-u-strtok.h
index 15389ac1..74272d3b 100644
--- a/tests/unistr/test-u-strtok.h
+++ b/tests/unistr/test-u-strtok.h
@@ -1,5 +1,5 @@
 /* Test of uN_strtok() functions.
-   Copyright (C) 2015-2022 Free Software Foundation, Inc.
+   Copyright (C) 2015-2024 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
@@ -50,10 +50,12 @@ test_u_strtok (void)
         'A', 'B', 'C', 'D', 'A', 'B', 'C', 'D', 'A', 'B', 'D', 'E', 0
       };
     ucs4_t u_delim[] = { 0x3000, 0x3001, 0 };
-    size_t input_len = 6 * SIZEOF (u_input);
-    UNIT *input = (UNIT *) malloc (input_len);
-    size_t delim_len = 6 * SIZEOF (u_delim);
-    UNIT *delim = (UNIT *) malloc (delim_len);
+    /* Convert ucs4_t[] to UNIT[].
+       Every ucs4_t yields at most 4 / sizeof (UNIT) units.  */
+    size_t input_len = SIZEOF (u_input) * (4 / sizeof (UNIT));
+    UNIT *input = (UNIT *) malloc (input_len * sizeof (UNIT));
+    size_t delim_len = SIZEOF (u_delim) * (4 / sizeof (UNIT));
+    UNIT *delim = (UNIT *) malloc (delim_len * sizeof (UNIT));
     UNIT *state;
     const UNIT *result;
     UNIT *ptr, *first_ptr, *second_ptr;
diff --git a/tests/unistr/test-u16-check.c b/tests/unistr/test-u16-check.c
index eb7b9988..0d83d6ac 100644
--- a/tests/unistr/test-u16-check.c
+++ b/tests/unistr/test-u16-check.c
@@ -1,5 +1,5 @@
 /* Test of u16_check() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-chr.c b/tests/unistr/test-u16-chr.c
index 6e6e1069..5f0b16e5 100644
--- a/tests/unistr/test-u16-chr.c
+++ b/tests/unistr/test-u16-chr.c
@@ -1,5 +1,5 @@
 /* Test of u16_chr() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-cmp.c b/tests/unistr/test-u16-cmp.c
index 393fa9d7..03d6b4cd 100644
--- a/tests/unistr/test-u16-cmp.c
+++ b/tests/unistr/test-u16-cmp.c
@@ -1,5 +1,5 @@
 /* Test of u16_cmp() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-cmp2.c b/tests/unistr/test-u16-cmp2.c
index e25fe1a6..2eb0dbd0 100644
--- a/tests/unistr/test-u16-cmp2.c
+++ b/tests/unistr/test-u16-cmp2.c
@@ -1,5 +1,5 @@
 /* Test of u16_cmp2() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-cpy-alloc.c b/tests/unistr/test-u16-cpy-alloc.c
index 80e8999d..bbc16456 100644
--- a/tests/unistr/test-u16-cpy-alloc.c
+++ b/tests/unistr/test-u16-cpy-alloc.c
@@ -1,5 +1,5 @@
 /* Test of u16_cpy_alloc() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-cpy.c b/tests/unistr/test-u16-cpy.c
index be7f11aa..cf9993fa 100644
--- a/tests/unistr/test-u16-cpy.c
+++ b/tests/unistr/test-u16-cpy.c
@@ -1,5 +1,5 @@
 /* Test of u16_cpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-mblen.c b/tests/unistr/test-u16-mblen.c
index 603cfe1f..a81a79a3 100644
--- a/tests/unistr/test-u16-mblen.c
+++ b/tests/unistr/test-u16-mblen.c
@@ -1,5 +1,5 @@
 /* Test of u16_mblen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-mbsnlen.c b/tests/unistr/test-u16-mbsnlen.c
index 02bf2030..f3a249f9 100644
--- a/tests/unistr/test-u16-mbsnlen.c
+++ b/tests/unistr/test-u16-mbsnlen.c
@@ -1,5 +1,5 @@
 /* Test of u16_mbsnlen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-mbtouc-unsafe.c b/tests/unistr/test-u16-mbtouc-unsafe.c
index 06d4e428..7fd02f27 100644
--- a/tests/unistr/test-u16-mbtouc-unsafe.c
+++ b/tests/unistr/test-u16-mbtouc-unsafe.c
@@ -1,5 +1,5 @@
 /* Test of u16_mbtouc_unsafe() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-mbtouc.c b/tests/unistr/test-u16-mbtouc.c
index 57a2b663..b7a3e47c 100644
--- a/tests/unistr/test-u16-mbtouc.c
+++ b/tests/unistr/test-u16-mbtouc.c
@@ -1,5 +1,5 @@
 /* Test of u16_mbtouc() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-mbtouc.h b/tests/unistr/test-u16-mbtouc.h
index a44a998d..5c33948a 100644
--- a/tests/unistr/test-u16-mbtouc.h
+++ b/tests/unistr/test-u16-mbtouc.h
@@ -1,5 +1,5 @@
 /* Test of u16_mbtouc() and u16_mbtouc_unsafe() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-mbtoucr.c b/tests/unistr/test-u16-mbtoucr.c
index dfdab67d..167a77e0 100644
--- a/tests/unistr/test-u16-mbtoucr.c
+++ b/tests/unistr/test-u16-mbtoucr.c
@@ -1,5 +1,5 @@
 /* Test of u16_mbtoucr() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-move.c b/tests/unistr/test-u16-move.c
index 8e050d44..887912b3 100644
--- a/tests/unistr/test-u16-move.c
+++ b/tests/unistr/test-u16-move.c
@@ -1,5 +1,5 @@
 /* Test of u16_move() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-next.c b/tests/unistr/test-u16-next.c
index e2022898..4d116e25 100644
--- a/tests/unistr/test-u16-next.c
+++ b/tests/unistr/test-u16-next.c
@@ -1,5 +1,5 @@
 /* Test of u16_next() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-pcpy.c b/tests/unistr/test-u16-pcpy.c
new file mode 100644
index 00000000..b20741e2
--- /dev/null
+++ b/tests/unistr/test-u16-pcpy.c
@@ -0,0 +1,28 @@
+/* Test of u16_pcpy() function.
+   Copyright (C) 2010-2024 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/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2023.  */
+
+#include <config.h>
+
+#include "unistr.h"
+
+#include "macros.h"
+
+#define UNIT uint16_t
+#define U_PCPY u16_pcpy
+#define MAGIC 0xBADE
+#include "test-pcpy.h"
diff --git a/tests/unistr/test-u16-prev.c b/tests/unistr/test-u16-prev.c
index c7400dc5..bf05ea05 100644
--- a/tests/unistr/test-u16-prev.c
+++ b/tests/unistr/test-u16-prev.c
@@ -1,5 +1,5 @@
 /* Test of u16_prev() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-set.c b/tests/unistr/test-u16-set.c
index a5270d10..7a6597dd 100644
--- a/tests/unistr/test-u16-set.c
+++ b/tests/unistr/test-u16-set.c
@@ -1,5 +1,5 @@
 /* Test of u16_set() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-stpcpy.c b/tests/unistr/test-u16-stpcpy.c
index 5f18e011..616041d2 100644
--- a/tests/unistr/test-u16-stpcpy.c
+++ b/tests/unistr/test-u16-stpcpy.c
@@ -1,5 +1,5 @@
 /* Test of u16_stpcpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-stpncpy.c b/tests/unistr/test-u16-stpncpy.c
index 104ea16c..35dd20d5 100644
--- a/tests/unistr/test-u16-stpncpy.c
+++ b/tests/unistr/test-u16-stpncpy.c
@@ -1,5 +1,5 @@
 /* Test of u16_stpncpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strcat.c b/tests/unistr/test-u16-strcat.c
index de5448b2..8ec36d4c 100644
--- a/tests/unistr/test-u16-strcat.c
+++ b/tests/unistr/test-u16-strcat.c
@@ -1,5 +1,5 @@
 /* Test of u16_strcat() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strchr.c b/tests/unistr/test-u16-strchr.c
index f4ec6881..e23df8c2 100644
--- a/tests/unistr/test-u16-strchr.c
+++ b/tests/unistr/test-u16-strchr.c
@@ -1,5 +1,5 @@
 /* Test of u16_strchr() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strcmp.c b/tests/unistr/test-u16-strcmp.c
index 7ab3e831..4ee85078 100644
--- a/tests/unistr/test-u16-strcmp.c
+++ b/tests/unistr/test-u16-strcmp.c
@@ -1,5 +1,5 @@
 /* Test of u16_strcmp() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strcmp.h b/tests/unistr/test-u16-strcmp.h
index 84b8d511..3a0f3b18 100644
--- a/tests/unistr/test-u16-strcmp.h
+++ b/tests/unistr/test-u16-strcmp.h
@@ -1,5 +1,5 @@
 /* Test of u16_strcmp() and u16_strcoll() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strcoll.c b/tests/unistr/test-u16-strcoll.c
index 9ea43bca..b49f4b66 100644
--- a/tests/unistr/test-u16-strcoll.c
+++ b/tests/unistr/test-u16-strcoll.c
@@ -1,5 +1,5 @@
 /* Test of u16_strcoll() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strcpy.c b/tests/unistr/test-u16-strcpy.c
index 7f0e01e6..9d2f475d 100644
--- a/tests/unistr/test-u16-strcpy.c
+++ b/tests/unistr/test-u16-strcpy.c
@@ -1,5 +1,5 @@
 /* Test of u16_strcpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strdup.c b/tests/unistr/test-u16-strdup.c
index 798831e1..936bddcb 100644
--- a/tests/unistr/test-u16-strdup.c
+++ b/tests/unistr/test-u16-strdup.c
@@ -1,5 +1,5 @@
 /* Test of u16_strdup() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strlen.c b/tests/unistr/test-u16-strlen.c
index 68198a41..e9348b81 100644
--- a/tests/unistr/test-u16-strlen.c
+++ b/tests/unistr/test-u16-strlen.c
@@ -1,5 +1,5 @@
 /* Test of u16_strlen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strmblen.c b/tests/unistr/test-u16-strmblen.c
index f31d824c..88dd0f27 100644
--- a/tests/unistr/test-u16-strmblen.c
+++ b/tests/unistr/test-u16-strmblen.c
@@ -1,5 +1,5 @@
 /* Test of u16_strmblen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strmbtouc.c b/tests/unistr/test-u16-strmbtouc.c
index bb7a5ca9..c4c76ca5 100644
--- a/tests/unistr/test-u16-strmbtouc.c
+++ b/tests/unistr/test-u16-strmbtouc.c
@@ -1,5 +1,5 @@
 /* Test of u16_strmbtouc() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strncat.c b/tests/unistr/test-u16-strncat.c
index 9eda6e15..6079cb71 100644
--- a/tests/unistr/test-u16-strncat.c
+++ b/tests/unistr/test-u16-strncat.c
@@ -1,5 +1,5 @@
 /* Test of u16_strncat() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strncmp.c b/tests/unistr/test-u16-strncmp.c
index 3d03a7a2..45bc9fab 100644
--- a/tests/unistr/test-u16-strncmp.c
+++ b/tests/unistr/test-u16-strncmp.c
@@ -1,5 +1,5 @@
 /* Test of u16_strncmp() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strncpy.c b/tests/unistr/test-u16-strncpy.c
index 184c6311..837dac9c 100644
--- a/tests/unistr/test-u16-strncpy.c
+++ b/tests/unistr/test-u16-strncpy.c
@@ -1,5 +1,5 @@
 /* Test of u16_strncpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strnlen.c b/tests/unistr/test-u16-strnlen.c
index 9258b965..48604fee 100644
--- a/tests/unistr/test-u16-strnlen.c
+++ b/tests/unistr/test-u16-strnlen.c
@@ -1,5 +1,5 @@
 /* Test of u16_strnlen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-strstr.c b/tests/unistr/test-u16-strstr.c
index bbad6c61..4906a96f 100644
--- a/tests/unistr/test-u16-strstr.c
+++ b/tests/unistr/test-u16-strstr.c
@@ -1,5 +1,5 @@
 /* Test of u16_strstr() function.
-   Copyright (C) 2011-2022 Free Software Foundation, Inc.
+   Copyright (C) 2011-2024 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
@@ -29,6 +29,7 @@
 
 #define UNIT uint16_t
 #define U_STRSTR u16_strstr
+#define U_SET u16_set
 #include "test-u-strstr.h"
 
 int
diff --git a/tests/unistr/test-u16-strtok.c b/tests/unistr/test-u16-strtok.c
index e226393d..ef9ffbb5 100644
--- a/tests/unistr/test-u16-strtok.c
+++ b/tests/unistr/test-u16-strtok.c
@@ -1,5 +1,5 @@
 /* Test of u16_strtok() function.
-   Copyright (C) 2015-2022 Free Software Foundation, Inc.
+   Copyright (C) 2015-2024 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
diff --git a/tests/unistr/test-u16-to-u32.c b/tests/unistr/test-u16-to-u32.c
index de19d5a6..5b340451 100644
--- a/tests/unistr/test-u16-to-u32.c
+++ b/tests/unistr/test-u16-to-u32.c
@@ -1,5 +1,5 @@
 /* Test of u16_to_u32() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-to-u8.c b/tests/unistr/test-u16-to-u8.c
index acbad8ac..71b9a02e 100644
--- a/tests/unistr/test-u16-to-u8.c
+++ b/tests/unistr/test-u16-to-u8.c
@@ -1,5 +1,5 @@
 /* Test of u16_to_u8() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u16-uctomb.c b/tests/unistr/test-u16-uctomb.c
index 3408cba3..14338d63 100644
--- a/tests/unistr/test-u16-uctomb.c
+++ b/tests/unistr/test-u16-uctomb.c
@@ -1,5 +1,5 @@
 /* Test of u16_uctomb() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-check.c b/tests/unistr/test-u32-check.c
index 9b43b03e..fab64b23 100644
--- a/tests/unistr/test-u32-check.c
+++ b/tests/unistr/test-u32-check.c
@@ -1,5 +1,5 @@
 /* Test of u32_check() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-chr.c b/tests/unistr/test-u32-chr.c
index 7cd3912d..474681ff 100644
--- a/tests/unistr/test-u32-chr.c
+++ b/tests/unistr/test-u32-chr.c
@@ -1,5 +1,5 @@
 /* Test of u32_chr() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-cmp.c b/tests/unistr/test-u32-cmp.c
index d76024a2..57579eda 100644
--- a/tests/unistr/test-u32-cmp.c
+++ b/tests/unistr/test-u32-cmp.c
@@ -1,5 +1,5 @@
 /* Test of u32_cmp() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-cmp2.c b/tests/unistr/test-u32-cmp2.c
index b3d249da..0fbb8c0a 100644
--- a/tests/unistr/test-u32-cmp2.c
+++ b/tests/unistr/test-u32-cmp2.c
@@ -1,5 +1,5 @@
 /* Test of u32_cmp2() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-cpy-alloc.c b/tests/unistr/test-u32-cpy-alloc.c
index f9123115..f3f9d106 100644
--- a/tests/unistr/test-u32-cpy-alloc.c
+++ b/tests/unistr/test-u32-cpy-alloc.c
@@ -1,5 +1,5 @@
 /* Test of u32_cpy_alloc() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-cpy.c b/tests/unistr/test-u32-cpy.c
index b4f8f90a..0ba5f8b4 100644
--- a/tests/unistr/test-u32-cpy.c
+++ b/tests/unistr/test-u32-cpy.c
@@ -1,5 +1,5 @@
 /* Test of u32_cpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-mblen.c b/tests/unistr/test-u32-mblen.c
index 6cfb22a2..5e8e0e29 100644
--- a/tests/unistr/test-u32-mblen.c
+++ b/tests/unistr/test-u32-mblen.c
@@ -1,5 +1,5 @@
 /* Test of u32_mblen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-mbsnlen.c b/tests/unistr/test-u32-mbsnlen.c
index 4ef6e316..e8f5c5da 100644
--- a/tests/unistr/test-u32-mbsnlen.c
+++ b/tests/unistr/test-u32-mbsnlen.c
@@ -1,5 +1,5 @@
 /* Test of u32_mbsnlen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-mbtouc-unsafe.c b/tests/unistr/test-u32-mbtouc-unsafe.c
index cfe0c4ca..111768db 100644
--- a/tests/unistr/test-u32-mbtouc-unsafe.c
+++ b/tests/unistr/test-u32-mbtouc-unsafe.c
@@ -1,5 +1,5 @@
 /* Test of u32_mbtouc_unsafe() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-mbtouc.c b/tests/unistr/test-u32-mbtouc.c
index b45e61e2..0804d8e4 100644
--- a/tests/unistr/test-u32-mbtouc.c
+++ b/tests/unistr/test-u32-mbtouc.c
@@ -1,5 +1,5 @@
 /* Test of u32_mbtouc() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-mbtouc.h b/tests/unistr/test-u32-mbtouc.h
index 1b226a16..37e6342f 100644
--- a/tests/unistr/test-u32-mbtouc.h
+++ b/tests/unistr/test-u32-mbtouc.h
@@ -1,5 +1,5 @@
 /* Test of u32_mbtouc() and u32_mbtouc_unsafe() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-mbtoucr.c b/tests/unistr/test-u32-mbtoucr.c
index 30c3ca29..7d74a87a 100644
--- a/tests/unistr/test-u32-mbtoucr.c
+++ b/tests/unistr/test-u32-mbtoucr.c
@@ -1,5 +1,5 @@
 /* Test of u32_mbtoucr() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-move.c b/tests/unistr/test-u32-move.c
index 26b730bd..82c9a379 100644
--- a/tests/unistr/test-u32-move.c
+++ b/tests/unistr/test-u32-move.c
@@ -1,5 +1,5 @@
 /* Test of u32_move() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-next.c b/tests/unistr/test-u32-next.c
index 42103347..320d520e 100644
--- a/tests/unistr/test-u32-next.c
+++ b/tests/unistr/test-u32-next.c
@@ -1,5 +1,5 @@
 /* Test of u32_next() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-pcpy.c b/tests/unistr/test-u32-pcpy.c
new file mode 100644
index 00000000..af77cc25
--- /dev/null
+++ b/tests/unistr/test-u32-pcpy.c
@@ -0,0 +1,28 @@
+/* Test of u32_pcpy() function.
+   Copyright (C) 2010-2024 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/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2023.  */
+
+#include <config.h>
+
+#include "unistr.h"
+
+#include "macros.h"
+
+#define UNIT uint32_t
+#define U_PCPY u32_pcpy
+#define MAGIC 0xBADFACE
+#include "test-pcpy.h"
diff --git a/tests/unistr/test-u32-prev.c b/tests/unistr/test-u32-prev.c
index 5dd61f27..7e648dd1 100644
--- a/tests/unistr/test-u32-prev.c
+++ b/tests/unistr/test-u32-prev.c
@@ -1,5 +1,5 @@
 /* Test of u32_prev() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-set.c b/tests/unistr/test-u32-set.c
index 6551c9d5..99e644dc 100644
--- a/tests/unistr/test-u32-set.c
+++ b/tests/unistr/test-u32-set.c
@@ -1,5 +1,5 @@
 /* Test of u32_set() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-stpcpy.c b/tests/unistr/test-u32-stpcpy.c
index 9bb5adfc..c6ac1751 100644
--- a/tests/unistr/test-u32-stpcpy.c
+++ b/tests/unistr/test-u32-stpcpy.c
@@ -1,5 +1,5 @@
 /* Test of u32_stpcpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-stpncpy.c b/tests/unistr/test-u32-stpncpy.c
index 667fb221..a417fe0c 100644
--- a/tests/unistr/test-u32-stpncpy.c
+++ b/tests/unistr/test-u32-stpncpy.c
@@ -1,5 +1,5 @@
 /* Test of u32_stpncpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strcat.c b/tests/unistr/test-u32-strcat.c
index cf6ed7fe..64e1b5cc 100644
--- a/tests/unistr/test-u32-strcat.c
+++ b/tests/unistr/test-u32-strcat.c
@@ -1,5 +1,5 @@
 /* Test of u32_strcat() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strchr.c b/tests/unistr/test-u32-strchr.c
index 1359e1a4..075d1d66 100644
--- a/tests/unistr/test-u32-strchr.c
+++ b/tests/unistr/test-u32-strchr.c
@@ -1,5 +1,5 @@
 /* Test of u32_strchr() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strcmp.c b/tests/unistr/test-u32-strcmp.c
index e59bb93e..71fd0b1e 100644
--- a/tests/unistr/test-u32-strcmp.c
+++ b/tests/unistr/test-u32-strcmp.c
@@ -1,5 +1,5 @@
 /* Test of u32_strcmp() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strcmp.h b/tests/unistr/test-u32-strcmp.h
index d32b8e04..4b149103 100644
--- a/tests/unistr/test-u32-strcmp.h
+++ b/tests/unistr/test-u32-strcmp.h
@@ -1,5 +1,5 @@
 /* Test of u32_strcmp() and u32_strcoll() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strcoll.c b/tests/unistr/test-u32-strcoll.c
index 73fa65ae..bd3180e1 100644
--- a/tests/unistr/test-u32-strcoll.c
+++ b/tests/unistr/test-u32-strcoll.c
@@ -1,5 +1,5 @@
 /* Test of u32_strcoll() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strcpy.c b/tests/unistr/test-u32-strcpy.c
index caf5d4af..22a6e70e 100644
--- a/tests/unistr/test-u32-strcpy.c
+++ b/tests/unistr/test-u32-strcpy.c
@@ -1,5 +1,5 @@
 /* Test of u32_strcpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strdup.c b/tests/unistr/test-u32-strdup.c
index 753e50c1..f81701fe 100644
--- a/tests/unistr/test-u32-strdup.c
+++ b/tests/unistr/test-u32-strdup.c
@@ -1,5 +1,5 @@
 /* Test of u32_strdup() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strlen.c b/tests/unistr/test-u32-strlen.c
index 6eeb00c0..6186fbdb 100644
--- a/tests/unistr/test-u32-strlen.c
+++ b/tests/unistr/test-u32-strlen.c
@@ -1,5 +1,5 @@
 /* Test of u32_strlen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strmblen.c b/tests/unistr/test-u32-strmblen.c
index e1ced4e1..62a5a0b0 100644
--- a/tests/unistr/test-u32-strmblen.c
+++ b/tests/unistr/test-u32-strmblen.c
@@ -1,5 +1,5 @@
 /* Test of u32_strmblen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strmbtouc.c b/tests/unistr/test-u32-strmbtouc.c
index 29f18316..19003098 100644
--- a/tests/unistr/test-u32-strmbtouc.c
+++ b/tests/unistr/test-u32-strmbtouc.c
@@ -1,5 +1,5 @@
 /* Test of u32_strmbtouc() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strncat.c b/tests/unistr/test-u32-strncat.c
index eac5119c..10b736d3 100644
--- a/tests/unistr/test-u32-strncat.c
+++ b/tests/unistr/test-u32-strncat.c
@@ -1,5 +1,5 @@
 /* Test of u32_strncat() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strncmp.c b/tests/unistr/test-u32-strncmp.c
index 33b8d69e..e304a595 100644
--- a/tests/unistr/test-u32-strncmp.c
+++ b/tests/unistr/test-u32-strncmp.c
@@ -1,5 +1,5 @@
 /* Test of u32_strncmp() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strncpy.c b/tests/unistr/test-u32-strncpy.c
index d65074dd..e78f0b25 100644
--- a/tests/unistr/test-u32-strncpy.c
+++ b/tests/unistr/test-u32-strncpy.c
@@ -1,5 +1,5 @@
 /* Test of u32_strncpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strnlen.c b/tests/unistr/test-u32-strnlen.c
index 8138efe6..31b69409 100644
--- a/tests/unistr/test-u32-strnlen.c
+++ b/tests/unistr/test-u32-strnlen.c
@@ -1,5 +1,5 @@
 /* Test of u32_strnlen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-strstr.c b/tests/unistr/test-u32-strstr.c
index 6d29a69d..21caa784 100644
--- a/tests/unistr/test-u32-strstr.c
+++ b/tests/unistr/test-u32-strstr.c
@@ -1,5 +1,5 @@
 /* Test of u32_strstr() function.
-   Copyright (C) 2011-2022 Free Software Foundation, Inc.
+   Copyright (C) 2011-2024 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
@@ -29,6 +29,7 @@
 
 #define UNIT uint32_t
 #define U_STRSTR u32_strstr
+#define U_SET u32_set
 #include "test-u-strstr.h"
 
 int
diff --git a/tests/unistr/test-u32-strtok.c b/tests/unistr/test-u32-strtok.c
index 442bc1a2..90aed3d6 100644
--- a/tests/unistr/test-u32-strtok.c
+++ b/tests/unistr/test-u32-strtok.c
@@ -1,5 +1,5 @@
 /* Test of u32_strtok() function.
-   Copyright (C) 2015-2022 Free Software Foundation, Inc.
+   Copyright (C) 2015-2024 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
diff --git a/tests/unistr/test-u32-to-u16.c b/tests/unistr/test-u32-to-u16.c
index ac850089..fbf1a03a 100644
--- a/tests/unistr/test-u32-to-u16.c
+++ b/tests/unistr/test-u32-to-u16.c
@@ -1,5 +1,5 @@
 /* Test of u32_to_u16() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-to-u8.c b/tests/unistr/test-u32-to-u8.c
index 1a02f795..83144921 100644
--- a/tests/unistr/test-u32-to-u8.c
+++ b/tests/unistr/test-u32-to-u8.c
@@ -1,5 +1,5 @@
 /* Test of u32_to_u8() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u32-uctomb.c b/tests/unistr/test-u32-uctomb.c
index d3b1bb65..913398c8 100644
--- a/tests/unistr/test-u32-uctomb.c
+++ b/tests/unistr/test-u32-uctomb.c
@@ -1,5 +1,5 @@
 /* Test of u32_uctomb() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-check.c b/tests/unistr/test-u8-check.c
index 8e361cc8..d05c0fcb 100644
--- a/tests/unistr/test-u8-check.c
+++ b/tests/unistr/test-u8-check.c
@@ -1,5 +1,5 @@
 /* Test of u8_check() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-chr.c b/tests/unistr/test-u8-chr.c
index a0a46d95..c0827063 100644
--- a/tests/unistr/test-u8-chr.c
+++ b/tests/unistr/test-u8-chr.c
@@ -1,5 +1,5 @@
 /* Test of u8_chr() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-cmp.c b/tests/unistr/test-u8-cmp.c
index 528e691e..47b0f215 100644
--- a/tests/unistr/test-u8-cmp.c
+++ b/tests/unistr/test-u8-cmp.c
@@ -1,5 +1,5 @@
 /* Test of u8_cmp() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-cmp2.c b/tests/unistr/test-u8-cmp2.c
index 9a3b99cf..b5063784 100644
--- a/tests/unistr/test-u8-cmp2.c
+++ b/tests/unistr/test-u8-cmp2.c
@@ -1,5 +1,5 @@
 /* Test of u8_cmp2() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-cpy-alloc.c b/tests/unistr/test-u8-cpy-alloc.c
index 726148e8..d0e11542 100644
--- a/tests/unistr/test-u8-cpy-alloc.c
+++ b/tests/unistr/test-u8-cpy-alloc.c
@@ -1,5 +1,5 @@
 /* Test of u8_cpy_alloc() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-cpy.c b/tests/unistr/test-u8-cpy.c
index 58cc5f81..33987177 100644
--- a/tests/unistr/test-u8-cpy.c
+++ b/tests/unistr/test-u8-cpy.c
@@ -1,5 +1,5 @@
 /* Test of u8_cpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-mblen.c b/tests/unistr/test-u8-mblen.c
index 54dbd4b5..69ac7e55 100644
--- a/tests/unistr/test-u8-mblen.c
+++ b/tests/unistr/test-u8-mblen.c
@@ -1,5 +1,5 @@
 /* Test of u8_mblen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-mbsnlen.c b/tests/unistr/test-u8-mbsnlen.c
index 7b8f0292..ca31d856 100644
--- a/tests/unistr/test-u8-mbsnlen.c
+++ b/tests/unistr/test-u8-mbsnlen.c
@@ -1,5 +1,5 @@
 /* Test of u8_mbsnlen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
@@ -61,9 +61,18 @@ main ()
      that a "malformed sequence" is interpreted in the same way as
      "a character that is outside the adopted subset".
      Reference:
+       ISO 10646-1 amendment 2
+       <https://www.cl.cam.ac.uk/~mgk25/ucs/ISO-10646-UTF-8.html>
        Markus Kuhn: UTF-8 decoder capability and stress test
        <https://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt>
        <https://www.w3.org/2001/06/utf-8-wrong/UTF-8-test.html>
+     These old specifications (from ca. 2000) were a bit ambiguous, and the
+     definition of UTF-8 has changed a bit as well.  The newer specification
+     we obey is the Unicode Standard, version 15.
+     Reference:
+       Unicode Standard 15.0.0, section 3.9
+       <https://www.unicode.org/versions/Unicode15.0.0/ch03.pdf>
+       pages 124..129, especially table 3-7.
    */
   /* 3.1. Test that each unexpected continuation byte is signalled as a
      malformed sequence of its own.  */
@@ -97,9 +106,14 @@ main ()
   }
   /* 3.3.2. 3-byte sequence with last byte missing.  */
   {
-    static const uint8_t input[] = { '"', 0xE0, 0x80, '"' };
+    static const uint8_t input[] = { '"', 0xE0, 0xA0, '"' };
     ASSERT (u8_mbsnlen (input, 4) == 3);
   }
+  {
+    /* Outdated example: 0xE0 0x80 is an ill-formed sequence.  */
+    static const uint8_t input[] = { '"', 0xE0, 0x80, '"' };
+    ASSERT (u8_mbsnlen (input, 4) == 4);
+  }
   /* 3.3.7. 3-byte sequence with last byte missing.  */
   {
     static const uint8_t input[] = { '"', 0xEF, 0xBF, '"' };
@@ -107,14 +121,24 @@ main ()
   }
   /* 3.3.3. 4-byte sequence with last byte missing.  */
   {
-    static const uint8_t input[] = { '"', 0xF0, 0x80, 0x80, '"' };
+    static const uint8_t input[] = { '"', 0xF0, 0x90, 0x80, '"' };
     ASSERT (u8_mbsnlen (input, 5) == 3);
   }
+  {
+    /* Outdated example: 0xF0 0x80 is an ill-formed sequence.  */
+    static const uint8_t input[] = { '"', 0xF0, 0x80, 0x80, '"' };
+    ASSERT (u8_mbsnlen (input, 5) == 5);
+  }
   /* 3.3.8. 4-byte sequence with last byte missing.  */
   {
-    static const uint8_t input[] = { '"', 0xF7, 0xBF, 0xBF, '"' };
+    static const uint8_t input[] = { '"', 0xF3, 0xBF, 0xBF, '"' };
     ASSERT (u8_mbsnlen (input, 5) == 3);
   }
+  {
+    /* Outdated example: 0xF7 is an invalid first byte.  */
+    static const uint8_t input[] = { '"', 0xF7, 0xBF, 0xBF, '"' };
+    ASSERT (u8_mbsnlen (input, 5) == 5);
+  }
 
   return 0;
 }
diff --git a/tests/unistr/test-u8-mbtouc-unsafe.c b/tests/unistr/test-u8-mbtouc-unsafe.c
index 1e29f8bc..8b471ea4 100644
--- a/tests/unistr/test-u8-mbtouc-unsafe.c
+++ b/tests/unistr/test-u8-mbtouc-unsafe.c
@@ -1,5 +1,5 @@
 /* Test of u8_mbtouc_unsafe() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-mbtouc.c b/tests/unistr/test-u8-mbtouc.c
index 39bcaef9..c063c9ab 100644
--- a/tests/unistr/test-u8-mbtouc.c
+++ b/tests/unistr/test-u8-mbtouc.c
@@ -1,5 +1,5 @@
 /* Test of u8_mbtouc() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
@@ -34,9 +34,18 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
      that a "malformed sequence" is interpreted in the same way as
      "a character that is outside the adopted subset".
      Reference:
+       ISO 10646-1 amendment 2
+       <https://www.cl.cam.ac.uk/~mgk25/ucs/ISO-10646-UTF-8.html>
        Markus Kuhn: UTF-8 decoder capability and stress test
        <https://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt>
        <https://www.w3.org/2001/06/utf-8-wrong/UTF-8-test.html>
+     These old specifications (from ca. 2000) were a bit ambiguous, and the
+     definition of UTF-8 has changed a bit as well.  The newer specification
+     we obey is the Unicode Standard, version 15.
+     Reference:
+       Unicode Standard 15.0.0, section 3.9
+       <https://www.unicode.org/versions/Unicode15.0.0/ch03.pdf>
+       pages 124..129, especially table 3-7.
    */
   /* 3.1. Test that each unexpected continuation byte is signalled as a
      malformed sequence of its own.  */
@@ -118,7 +127,7 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
   }
   /* 3.3.2. 3-byte sequence with last byte missing.  */
   {
-    static const uint8_t input[] = { '"', 0xE0, 0x80, '"' };
+    static const uint8_t input[] = { '"', 0xE0, 0xA0, '"' };
     uc = 0xBADFACE;
     ret = my_u8_mbtouc (&uc, input, 4);
     ASSERT (ret == 1);
@@ -132,6 +141,26 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
     ASSERT (ret == 1);
     ASSERT (uc == 0x0022);
   }
+  {
+    /* Outdated example: 0xE0 0x80 is an ill-formed sequence.  */
+    static const uint8_t input[] = { '"', 0xE0, 0x80, '"' };
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input, 4);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 1, 3);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 2, 2);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 3, 1);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+  }
   /* 3.3.7. 3-byte sequence with last byte missing.  */
   {
     static const uint8_t input[] = { '"', 0xEF, 0xBF, '"' };
@@ -150,7 +179,7 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
   }
   /* 3.3.3. 4-byte sequence with last byte missing.  */
   {
-    static const uint8_t input[] = { '"', 0xF0, 0x80, 0x80, '"' };
+    static const uint8_t input[] = { '"', 0xF0, 0x90, 0x80, '"' };
     uc = 0xBADFACE;
     ret = my_u8_mbtouc (&uc, input, 5);
     ASSERT (ret == 1);
@@ -164,9 +193,33 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
     ASSERT (ret == 1);
     ASSERT (uc == 0x0022);
   }
+  {
+    /* Outdated example: 0xF0 0x80 is an ill-formed sequence.  */
+    static const uint8_t input[] = { '"', 0xF0, 0x80, 0x80, '"' };
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input, 5);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 1, 4);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 2, 3);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 3, 2);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 4, 1);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+  }
   /* 3.3.8. 4-byte sequence with last byte missing.  */
   {
-    static const uint8_t input[] = { '"', 0xF7, 0xBF, 0xBF, '"' };
+    static const uint8_t input[] = { '"', 0xF3, 0xBF, 0xBF, '"' };
     uc = 0xBADFACE;
     ret = my_u8_mbtouc (&uc, input, 5);
     ASSERT (ret == 1);
@@ -180,6 +233,30 @@ test_safe_function (int (*my_u8_mbtouc) (ucs4_t *, const uint8_t *, size_t))
     ASSERT (ret == 1);
     ASSERT (uc == 0x0022);
   }
+  {
+    /* Outdated example: 0xF7 is an invalid first byte.  */
+    static const uint8_t input[] = { '"', 0xF7, 0xBF, 0xBF, '"' };
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input, 5);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 1, 4);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 2, 3);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 3, 2);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0xFFFD);
+    uc = 0xBADFACE;
+    ret = my_u8_mbtouc (&uc, input + 4, 1);
+    ASSERT (ret == 1);
+    ASSERT (uc == 0x0022);
+  }
 }
 
 int
diff --git a/tests/unistr/test-u8-mbtouc.h b/tests/unistr/test-u8-mbtouc.h
index fcfe3df8..dfe70be3 100644
--- a/tests/unistr/test-u8-mbtouc.h
+++ b/tests/unistr/test-u8-mbtouc.h
@@ -1,5 +1,5 @@
 /* Test of u8_mbtouc() and u8_mbtouc_unsafe() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-mbtoucr.c b/tests/unistr/test-u8-mbtoucr.c
index e6102603..6a4a74a2 100644
--- a/tests/unistr/test-u8-mbtoucr.c
+++ b/tests/unistr/test-u8-mbtoucr.c
@@ -1,5 +1,5 @@
 /* Test of u8_mbtoucr() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-move.c b/tests/unistr/test-u8-move.c
index baf074ec..a0c7ad79 100644
--- a/tests/unistr/test-u8-move.c
+++ b/tests/unistr/test-u8-move.c
@@ -1,5 +1,5 @@
 /* Test of u8_move() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-next.c b/tests/unistr/test-u8-next.c
index e3e43121..cdc1f763 100644
--- a/tests/unistr/test-u8-next.c
+++ b/tests/unistr/test-u8-next.c
@@ -1,5 +1,5 @@
 /* Test of u8_next() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-pcpy.c b/tests/unistr/test-u8-pcpy.c
new file mode 100644
index 00000000..dbd83ad5
--- /dev/null
+++ b/tests/unistr/test-u8-pcpy.c
@@ -0,0 +1,28 @@
+/* Test of u8_pcpy() function.
+   Copyright (C) 2010-2024 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/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2023.  */
+
+#include <config.h>
+
+#include "unistr.h"
+
+#include "macros.h"
+
+#define UNIT uint8_t
+#define U_PCPY u8_pcpy
+#define MAGIC 0xBA
+#include "test-pcpy.h"
diff --git a/tests/unistr/test-u8-prev.c b/tests/unistr/test-u8-prev.c
index 8b21ce29..5bbb5ce1 100644
--- a/tests/unistr/test-u8-prev.c
+++ b/tests/unistr/test-u8-prev.c
@@ -1,5 +1,5 @@
 /* Test of u8_prev() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-set.c b/tests/unistr/test-u8-set.c
index 223a5127..d06e0e0b 100644
--- a/tests/unistr/test-u8-set.c
+++ b/tests/unistr/test-u8-set.c
@@ -1,5 +1,5 @@
 /* Test of u8_set() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-stpcpy.c b/tests/unistr/test-u8-stpcpy.c
index daeb6ae9..6cdb850c 100644
--- a/tests/unistr/test-u8-stpcpy.c
+++ b/tests/unistr/test-u8-stpcpy.c
@@ -1,5 +1,5 @@
 /* Test of u8_stpcpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-stpncpy.c b/tests/unistr/test-u8-stpncpy.c
index a7987c31..873b1abd 100644
--- a/tests/unistr/test-u8-stpncpy.c
+++ b/tests/unistr/test-u8-stpncpy.c
@@ -1,5 +1,5 @@
 /* Test of u8_stpncpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strcat.c b/tests/unistr/test-u8-strcat.c
index 9dde531d..2a999f66 100644
--- a/tests/unistr/test-u8-strcat.c
+++ b/tests/unistr/test-u8-strcat.c
@@ -1,5 +1,5 @@
 /* Test of u8_strcat() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strchr.c b/tests/unistr/test-u8-strchr.c
index cfd40779..69e21a66 100644
--- a/tests/unistr/test-u8-strchr.c
+++ b/tests/unistr/test-u8-strchr.c
@@ -1,5 +1,5 @@
 /* Test of u8_strchr() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strcmp.c b/tests/unistr/test-u8-strcmp.c
index 447c6162..a0d3d7fc 100644
--- a/tests/unistr/test-u8-strcmp.c
+++ b/tests/unistr/test-u8-strcmp.c
@@ -1,5 +1,5 @@
 /* Test of u8_strcmp() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strcmp.h b/tests/unistr/test-u8-strcmp.h
index 7eaf2887..177d4bfc 100644
--- a/tests/unistr/test-u8-strcmp.h
+++ b/tests/unistr/test-u8-strcmp.h
@@ -1,5 +1,5 @@
 /* Test of u8_strcmp() and u8_strcoll() functions.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strcoll.c b/tests/unistr/test-u8-strcoll.c
index 7949e1a6..b86ea403 100644
--- a/tests/unistr/test-u8-strcoll.c
+++ b/tests/unistr/test-u8-strcoll.c
@@ -1,5 +1,5 @@
 /* Test of u8_strcoll() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strcpy.c b/tests/unistr/test-u8-strcpy.c
index dd9b40bf..9cf181b1 100644
--- a/tests/unistr/test-u8-strcpy.c
+++ b/tests/unistr/test-u8-strcpy.c
@@ -1,5 +1,5 @@
 /* Test of u8_strcpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strdup.c b/tests/unistr/test-u8-strdup.c
index 84a35053..fdb76026 100644
--- a/tests/unistr/test-u8-strdup.c
+++ b/tests/unistr/test-u8-strdup.c
@@ -1,5 +1,5 @@
 /* Test of u8_strdup() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strlen.c b/tests/unistr/test-u8-strlen.c
index 91a59663..a13a24fd 100644
--- a/tests/unistr/test-u8-strlen.c
+++ b/tests/unistr/test-u8-strlen.c
@@ -1,5 +1,5 @@
 /* Test of u8_strlen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strmblen.c b/tests/unistr/test-u8-strmblen.c
index 735dd905..2fdef5cf 100644
--- a/tests/unistr/test-u8-strmblen.c
+++ b/tests/unistr/test-u8-strmblen.c
@@ -1,5 +1,5 @@
 /* Test of u8_strmblen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strmbtouc.c b/tests/unistr/test-u8-strmbtouc.c
index 74a96c1b..a9db79fa 100644
--- a/tests/unistr/test-u8-strmbtouc.c
+++ b/tests/unistr/test-u8-strmbtouc.c
@@ -1,5 +1,5 @@
 /* Test of u8_strmbtouc() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strncat.c b/tests/unistr/test-u8-strncat.c
index d0c854c4..166952a2 100644
--- a/tests/unistr/test-u8-strncat.c
+++ b/tests/unistr/test-u8-strncat.c
@@ -1,5 +1,5 @@
 /* Test of u8_strncat() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strncmp.c b/tests/unistr/test-u8-strncmp.c
index ada859ef..78aac0c9 100644
--- a/tests/unistr/test-u8-strncmp.c
+++ b/tests/unistr/test-u8-strncmp.c
@@ -1,5 +1,5 @@
 /* Test of u8_strncmp() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strncpy.c b/tests/unistr/test-u8-strncpy.c
index 824b85df..22bb35a4 100644
--- a/tests/unistr/test-u8-strncpy.c
+++ b/tests/unistr/test-u8-strncpy.c
@@ -1,5 +1,5 @@
 /* Test of u8_strncpy() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strnlen.c b/tests/unistr/test-u8-strnlen.c
index 1a740d0d..c409fc90 100644
--- a/tests/unistr/test-u8-strnlen.c
+++ b/tests/unistr/test-u8-strnlen.c
@@ -1,5 +1,5 @@
 /* Test of u8_strnlen() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-strstr.c b/tests/unistr/test-u8-strstr.c
index b3610e46..791e1c97 100644
--- a/tests/unistr/test-u8-strstr.c
+++ b/tests/unistr/test-u8-strstr.c
@@ -1,5 +1,5 @@
 /* Test of u8_strstr() function.
-   Copyright (C) 2011-2022 Free Software Foundation, Inc.
+   Copyright (C) 2011-2024 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
@@ -29,6 +29,7 @@
 
 #define UNIT uint8_t
 #define U_STRSTR u8_strstr
+#define U_SET u8_set
 #include "test-u-strstr.h"
 
 int
diff --git a/tests/unistr/test-u8-strtok.c b/tests/unistr/test-u8-strtok.c
index 11c364e8..8d425c40 100644
--- a/tests/unistr/test-u8-strtok.c
+++ b/tests/unistr/test-u8-strtok.c
@@ -1,5 +1,5 @@
 /* Test of u8_strtok() function.
-   Copyright (C) 2015-2022 Free Software Foundation, Inc.
+   Copyright (C) 2015-2024 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
diff --git a/tests/unistr/test-u8-to-u16.c b/tests/unistr/test-u8-to-u16.c
index 377cf38d..ec104ace 100644
--- a/tests/unistr/test-u8-to-u16.c
+++ b/tests/unistr/test-u8-to-u16.c
@@ -1,5 +1,5 @@
 /* Test of u8_to_u16() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-to-u32.c b/tests/unistr/test-u8-to-u32.c
index 384c9dc9..5ab9752c 100644
--- a/tests/unistr/test-u8-to-u32.c
+++ b/tests/unistr/test-u8-to-u32.c
@@ -1,5 +1,5 @@
 /* Test of u8_to_u32() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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
diff --git a/tests/unistr/test-u8-uctomb.c b/tests/unistr/test-u8-uctomb.c
index cf37cb9b..2948eb09 100644
--- a/tests/unistr/test-u8-uctomb.c
+++ b/tests/unistr/test-u8-uctomb.c
@@ -1,5 +1,5 @@
 /* Test of u8_uctomb() function.
-   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+   Copyright (C) 2010-2024 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