gnulib/lib/unistr/u-cpy-alloc.h

/* Copy piece of UTF-8/UTF-16/UTF-32 string.
   Copyright (C) 1999, 2002, 2006-2007, 2009-2020 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 Lesser 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
   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 <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;
}