new file mode 100644
--- /dev/null
+++ b/lib/unistr/u-stpncpy.h
@@ -0,0 +1,32 @@
+/* Copy UTF-8/UTF-16/UTF-32 string.
+   Copyright (C) 1999, 2002, 2006 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation; either version 2, 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.  */
+
+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.  */
+  for (; n > 0; n--)
+    *dest++ = 0;
+
+  return dest - 1;
+}

new file mode 100644
--- /dev/null
+++ b/lib/unistr/u16-stpncpy.c
@@ -0,0 +1,27 @@
+/* Copy UTF-16 string.
+   Copyright (C) 1999, 2002, 2006 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation; either version 2, 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unistr.h"
+
+#define FUNC u16_stpncpy
+#define UNIT uint16_t
+#include "u-stpncpy.h"

new file mode 100644
--- /dev/null
+++ b/lib/unistr/u32-stpncpy.c
@@ -0,0 +1,27 @@
+/* Copy UTF-32 string.
+   Copyright (C) 1999, 2002, 2006 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation; either version 2, 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unistr.h"
+
+#define FUNC u32_stpncpy
+#define UNIT uint32_t
+#include "u-stpncpy.h"

new file mode 100644
--- /dev/null
+++ b/lib/unistr/u8-stpncpy.c
@@ -0,0 +1,46 @@
+/* Copy UTF-8 string.
+   Copyright (C) 1999, 2002, 2006 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation; either version 2, 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.  */
+
+/* Ensure stpncpy() gets declared.  */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE 1
+#endif
+
+#include <config.h>
+
+/* Specification.  */
+#include "unistr.h"
+
+#if __GLIBC__ >= 2
+
+# include <string.h>
+
+uint8_t *
+u8_stpncpy (uint8_t *dest, const uint8_t *src, size_t n)
+{
+  return (uint8_t *) stpncpy ((char *) dest, (const char *) src, n);
+}
+
+#else
+
+# define FUNC u8_stpncpy
+# define UNIT uint8_t
+# include "u-stpncpy.h"
+
+#endif

new file mode 100644
--- /dev/null
+++ b/modules/unistr/u16-stpncpy
@@ -0,0 +1,24 @@
+Description:
+Copy UTF-16 string.
+
+Files:
+lib/unistr/u16-stpncpy.c
+lib/unistr/u-stpncpy.h
+
+Depends-on:
+unistr/base
+
+configure.ac:
+
+Makefile.am:
+lib_SOURCES += unistr/u16-stpncpy.c
+
+Include:
+"unistr.h"
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
+

new file mode 100644
--- /dev/null
+++ b/modules/unistr/u32-stpncpy
@@ -0,0 +1,24 @@
+Description:
+Copy UTF-32 string.
+
+Files:
+lib/unistr/u32-stpncpy.c
+lib/unistr/u-stpncpy.h
+
+Depends-on:
+unistr/base
+
+configure.ac:
+
+Makefile.am:
+lib_SOURCES += unistr/u32-stpncpy.c
+
+Include:
+"unistr.h"
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
+

new file mode 100644
--- /dev/null
+++ b/modules/unistr/u8-stpncpy
@@ -0,0 +1,24 @@
+Description:
+Copy UTF-8 string.
+
+Files:
+lib/unistr/u8-stpncpy.c
+lib/unistr/u-stpncpy.h
+
+Depends-on:
+unistr/base
+
+configure.ac:
+
+Makefile.am:
+lib_SOURCES += unistr/u8-stpncpy.c
+
+Include:
+"unistr.h"
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
+