pmt: initial 3.0.2 update

include/libgnulib/unistr/u-cmp2.h

@@ -0,0 +1,35 @@
+/* Compare pieces of UTF-8/UTF-16/UTF-32 strings.
+   Copyright (C) 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2009.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+int
+FUNC (const UNIT *s1, size_t n1, const UNIT *s2, size_t n2)
+{
+  int cmp = U_CMP (s1, s2, MIN (n1, n2));
+
+  if (cmp == 0)
+    cmp = _GL_CMP (n1, n2);
+
+  return cmp;
+}

include/libgnulib/unistr/u-cpy-alloc.h

@@ -0,0 +1,49 @@
+/* Copy piece of UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006-2007, 2009-2024 Free Software Foundation,
+   Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+UNIT *
+FUNC (const UNIT *s, size_t n)
+{
+  UNIT *dest;
+
+  dest = (UNIT *) malloc (n > 0 ? n * sizeof (UNIT) : 1);
+  if (dest != NULL)
+    {
+#if 0
+      UNIT *destptr = dest;
+
+      for (; n > 0; n--)
+        *destptr++ = *s++;
+#else
+      if (n > 0)
+        memcpy ((char *) dest, (const char *) s, n * sizeof (UNIT));
+#endif
+    }
+  return dest;
+}

include/libgnulib/unistr/u-cpy.h

@@ -0,0 +1,33 @@
+/* Copy piece of UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <string.h>
+
+UNIT *
+FUNC (UNIT *dest, const UNIT *src, size_t n)
+{
+#if 0
+  UNIT *destptr = dest;
+
+  for (; n > 0; n--)
+    *destptr++ = *src++;
+#else
+  if (n > 0)
+    memcpy ((char *) dest, (const char *) src, n * sizeof (UNIT));
+#endif
+  return dest;
+}

include/libgnulib/unistr/u-endswith.h

@@ -0,0 +1,36 @@
+/* Substring test for UTF-8/UTF-16/UTF-32 strings.
+   Copyright (C) 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+bool
+FUNC (const UNIT *str, const UNIT *suffix)
+{
+  size_t len = U_STRLEN (str);
+  size_t suffixlen = U_STRLEN (suffix);
+
+  if (len >= suffixlen)
+    return (U_CMP (str + (len - suffixlen), suffix, suffixlen) == 0);
+  else
+    return false;
+}

include/libgnulib/unistr/u-move.h

@@ -0,0 +1,52 @@
+/* Copy piece of UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <string.h>
+
+UNIT *
+FUNC (UNIT *dest, const UNIT *src, size_t n)
+{
+#if 0
+  if (dest < src)
+    {
+      UNIT *destptr = dest;
+      const UNIT *srcptr = src;
+
+      for (; n > 0; n--)
+        *destptr++ = *srcptr++;
+    }
+  else if (dest > src)
+    {
+      UNIT *destptr = dest + n - 1;
+      const UNIT *srcptr = src + n - 1;
+
+      for (; n > 0; n--)
+        *destptr-- = *srcptr--;
+    }
+#else
+  memmove ((char *) dest, (const char *) src, n * sizeof (UNIT));
+#endif
+  return dest;
+}

include/libgnulib/unistr/u-pcpy.h

@@ -0,0 +1,22 @@
+/* Copy piece of UTF-8/16/32 string, return pointer after last written unit.
+   Copyright (C) 2020-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2023.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+UNIT *
+FUNC (UNIT *dest, const UNIT *src, size_t n)
+{
+  return U_CPY (dest, src, n) + n;
+}

include/libgnulib/unistr/u-set.h

@@ -0,0 +1,47 @@
+/* Fill UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+
+UNIT *
+FUNC (UNIT *s, ucs4_t uc, size_t n)
+{
+  if (n > 0)
+    {
+      if (IS_SINGLE_UNIT (uc))
+        {
+          UNIT *ptr = s;
+
+          for (; n > 0; n--)
+            *ptr++ = uc;
+        }
+      else
+        {
+          errno = EILSEQ;
+          return NULL;
+        }
+    }
+  return s;
+}

include/libgnulib/unistr/u-startswith.h

@@ -0,0 +1,38 @@
+/* Substring test for UTF-8/UTF-16/UTF-32 strings.
+   Copyright (C) 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+bool
+FUNC (const UNIT *str, const UNIT *prefix)
+{
+  for (;;)
+    {
+      UNIT uc1 = *str++;
+      UNIT uc2 = *prefix++;
+      if (uc2 == 0)
+        return true;
+      if (uc1 != uc2)
+        return false;
+    }
+}

include/libgnulib/unistr/u-stpcpy.h

@@ -0,0 +1,32 @@
+/* Copy UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+UNIT *
+FUNC (UNIT *dest, const UNIT *src)
+{
+  for (; (*dest = *src) != 0; src++, dest++)
+    ;
+  return dest;
+}

include/libgnulib/unistr/u-stpncpy.h

@@ -0,0 +1,42 @@
+/* Copy UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+UNIT *
+FUNC (UNIT *dest, const UNIT *src, size_t n)
+{
+  for (; n > 0 && (*dest = *src) != 0; src++, dest++, n--)
+    ;
+
+  /* This behavior is rarely useful, but it is here for consistency with
+     strncpy and wcsncpy.  */
+  {
+    UNIT *destptr = dest;
+
+    for (; n > 0; n--)
+      *destptr++ = 0;
+  }
+
+  return dest;
+}

include/libgnulib/unistr/u-strcat.h

@@ -0,0 +1,26 @@
+/* Concatenate UTF-8/UTF-16/UTF-32 strings.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+UNIT *
+FUNC (UNIT *dest, const UNIT *src)
+{
+  UNIT *destptr = dest + U_STRLEN (dest);
+
+  for (; (*destptr = *src) != 0; src++, destptr++)
+    ;
+  return dest;
+}

include/libgnulib/unistr/u-strcoll.h

@@ -0,0 +1,100 @@
+/* Compare UTF-8/UTF-16/UTF-32 strings using the collation rules of the current
+   locale.
+   Copyright (C) 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2009.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+int
+FUNC (const UNIT *s1, const UNIT *s2)
+{
+  /* When this function succeeds, it sets errno back to its original value.
+     When it fails, it sets errno, but also returns a meaningful return value,
+     for the sake of callers which ignore errno.  */
+  int final_errno = errno;
+  const char *encoding = locale_charset ();
+  char *sl1;
+  char *sl2;
+  int result;
+
+  /* Pass iconveh_error here, not iconveh_question_mark.  Otherwise the
+     conversion to locale encoding can do transliteration or map some
+     characters to question marks, leading to results that depend on the
+     iconv() implementation and are not obvious.  */
+  sl1 = U_STRCONV_TO_ENCODING (s1, encoding, iconveh_error);
+  if (sl1 != NULL)
+    {
+      sl2 = U_STRCONV_TO_ENCODING (s2, encoding, iconveh_error);
+      if (sl2 != NULL)
+        {
+          /* Compare sl1 and sl2.  */
+          errno = 0;
+          result = strcoll (sl1, sl2);
+          if (errno == 0)
+            {
+              /* strcoll succeeded.  */
+              free (sl1);
+              free (sl2);
+              /* The conversion to locale encoding can drop Unicode TAG
+                 characters.  Therefore sl1 and sl2 may be equal when s1
+                 and s2 were in fact different.  Return a nonzero result
+                 in this case.  */
+              if (result == 0)
+                result = U_STRCMP (s1, s2);
+            }
+          else
+            {
+              /* strcoll failed.  */
+              final_errno = errno;
+              free (sl1);
+              free (sl2);
+              result = U_STRCMP (s1, s2);
+            }
+        }
+      else
+        {
+          /* s1 could be converted to locale encoding, s2 not.  */
+          final_errno = errno;
+          free (sl1);
+          result = -1;
+        }
+    }
+  else
+    {
+      final_errno = errno;
+      sl2 = U_STRCONV_TO_ENCODING (s2, encoding, iconveh_error);
+      if (sl2 != NULL)
+        {
+          /* s2 could be converted to locale encoding, s1 not.  */
+          free (sl2);
+          result = 1;
+        }
+      else
+        {
+          /* Neither s1 nor s2 could be converted to locale encoding.  */
+          result = U_STRCMP (s1, s2);
+        }
+    }
+
+  errno = final_errno;
+  return result;
+}

include/libgnulib/unistr/u-strcpy.h

@@ -0,0 +1,34 @@
+/* Copy UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+UNIT *
+FUNC (UNIT *dest, const UNIT *src)
+{
+  UNIT *destptr = dest;
+
+  for (; (*destptr = *src) != 0; src++, destptr++)
+    ;
+  return dest;
+}

include/libgnulib/unistr/u-strcspn.h

@@ -0,0 +1,62 @@
+/* Search for some characters in UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+size_t
+FUNC (const UNIT *str, const UNIT *reject)
+{
+  /* Optimize two cases.  */
+  if (reject[0] == 0)
+    return U_STRLEN (str);
+  {
+    ucs4_t uc;
+    int count = U_STRMBTOUC (&uc, reject);
+    if (count >= 0 && reject[count] == 0)
+      {
+        const UNIT *found = U_STRCHR (str, uc);
+        if (found != NULL)
+          return found - str;
+        else
+          return U_STRLEN (str);
+      }
+  }
+  /* General case.  */
+  {
+    const UNIT *ptr = str;
+
+    for (;;)
+      {
+        ucs4_t uc;
+        int count = U_STRMBTOUC (&uc, ptr);
+        if (count == 0)
+          return ptr - str;
+        if (count < 0)
+          break;
+        if (U_STRCHR (reject, uc))
+          return ptr - str;
+        ptr += count;
+      }
+    return U_STRLEN (str);
+  }
+}

include/libgnulib/unistr/u-strdup.h

@@ -0,0 +1,49 @@
+/* Copy UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006-2007, 2009-2024 Free Software Foundation,
+   Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+UNIT *
+FUNC (const UNIT *s)
+{
+  size_t n = U_STRLEN (s) + 1;
+  UNIT *dest;
+
+  dest = (UNIT *) malloc (n * sizeof (UNIT));
+  if (dest != NULL)
+    {
+#if 0
+      UNIT *destptr = dest;
+
+      for (; n > 0; n--)
+        *destptr++ = *s++;
+#else
+      memcpy ((char *) dest, (const char *) s, n * sizeof (UNIT));
+#endif
+    }
+  return dest;
+}

include/libgnulib/unistr/u-strlen.h

@@ -0,0 +1,26 @@
+/* Determine length of UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+size_t
+FUNC (const UNIT *s)
+{
+  const UNIT *ptr;
+
+  for (ptr = s; *ptr != 0; ptr++)
+    ;
+  return ptr - s;
+}

include/libgnulib/unistr/u-strncat.h

@@ -0,0 +1,36 @@
+/* Concatenate UTF-8/UTF-16/UTF-32 strings.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+UNIT *
+FUNC (UNIT *dest, const UNIT *src, size_t n)
+{
+  UNIT *destptr = dest + U_STRLEN (dest);
+
+  for (; n > 0 && (*destptr = *src) != 0; src++, destptr++, n--)
+    ;
+  if (n == 0)
+    *destptr = 0;
+  return dest;
+}

include/libgnulib/unistr/u-strncpy.h

@@ -0,0 +1,40 @@
+/* Copy UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+UNIT *
+FUNC (UNIT *dest, const UNIT *src, size_t n)
+{
+  UNIT *destptr = dest;
+
+  for (; n > 0 && (*destptr = *src) != 0; src++, destptr++, n--)
+    ;
+
+  /* This behavior is rarely useful, but it is here for consistency with
+     strncpy and wcsncpy.  */
+  for (; n > 0; n--)
+    *destptr++ = 0;
+
+  return dest;
+}

include/libgnulib/unistr/u-strnlen.h

@@ -0,0 +1,34 @@
+/* Determine bounded length of UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+size_t
+FUNC (const UNIT *s, size_t maxlen)
+{
+  const UNIT *ptr;
+
+  for (ptr = s; maxlen > 0 && *ptr != 0; ptr++, maxlen--)
+    ;
+  return ptr - s;
+}

include/libgnulib/unistr/u-strpbrk.h

@@ -0,0 +1,54 @@
+/* Search for some characters in UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+UNIT *
+FUNC (const UNIT *str, const UNIT *accept)
+{
+  /* Optimize two cases.  */
+  if (accept[0] == 0)
+    return NULL;
+  {
+    ucs4_t uc;
+    int count = U_STRMBTOUC (&uc, accept);
+    if (count >= 0 && accept[count] == 0)
+      return U_STRCHR (str, uc);
+  }
+  /* General case.  */
+  {
+    const UNIT *ptr = str;
+
+    for (;;)
+      {
+        ucs4_t uc;
+        int count = U_STRMBTOUC (&uc, ptr);
+        if (count <= 0)
+          break;
+        if (U_STRCHR (accept, uc))
+          return (UNIT *) ptr;
+        ptr += count;
+      }
+    return NULL;
+  }
+}

include/libgnulib/unistr/u-strspn.h

@@ -0,0 +1,62 @@
+/* Search for some characters in UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+size_t
+FUNC (const UNIT *str, const UNIT *accept)
+{
+  /* Optimize two cases.  */
+  if (accept[0] == 0)
+    return 0;
+  {
+    ucs4_t uc;
+    int count = U_STRMBTOUC (&uc, accept);
+    if (count >= 0 && accept[count] == 0)
+      {
+        const UNIT *ptr = str;
+        for (; *ptr != 0; ptr += count)
+          if (U_CMP (ptr, accept, count) != 0)
+            break;
+        return ptr - str;
+      }
+  }
+  /* General case.  */
+  {
+    const UNIT *ptr = str;
+
+    for (;;)
+      {
+        ucs4_t uc;
+        int count = U_STRMBTOUC (&uc, ptr);
+        if (count == 0)
+          return ptr - str;
+        if (count < 0)
+          break;
+        if (!U_STRCHR (accept, uc))
+          return ptr - str;
+        ptr += count;
+      }
+    return U_STRLEN (str);
+  }
+}

include/libgnulib/unistr/u-strtok.h

@@ -0,0 +1,60 @@
+/* Tokenize UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This file is free software.
+   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
+   You can redistribute it and/or modify it under either
+     - the terms of the GNU Lesser General Public License as published
+       by the Free Software Foundation, either version 3, or (at your
+       option) any later version, or
+     - the terms of the GNU General Public License as published by the
+       Free Software Foundation; either version 2, or (at your option)
+       any later version, or
+     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
+
+   This file 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
+   Lesser General Public License and the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License and of the GNU General Public License along with this
+   program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+UNIT *
+FUNC (UNIT *str, const UNIT *delim, UNIT **ptr)
+{
+  if (str == NULL)
+    {
+      str = *ptr;
+      if (str == NULL)
+        return NULL; /* reminder that end of token sequence has been reached */
+    }
+
+  /* Skip leading delimiters.  */
+  str += U_STRSPN (str, delim);
+
+  /* Found a token?  */
+  if (*str == 0)
+    {
+      *ptr = NULL;
+      return NULL;
+    }
+
+  /* Move past the token. */
+  {
+    UNIT *token_end = U_STRPBRK (str, delim);
+    if (token_end)
+      {
+        *ptr = token_end + U_STRMBLEN (token_end);
+        /* NUL-terminate the token.  */
+        *token_end = 0;
+      }
+    else
+      *ptr = NULL;
+  }
+
+  return str;
+}