lib/unistr/u-cpy-alloc.h

   1 /* Copy piece of UTF-8/UTF-16/UTF-32 string.
   2    Copyright (C) 1999, 2002, 2006-2007, 2009-2021 Free Software Foundation,
   3    Inc.
   4    Written by Bruno Haible <bruno@clisp.org>, 2002.
   5
   6    This program is free software: you can redistribute it and/or modify it
   7    under the terms of the GNU Lesser General Public License as published
   8    by the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public License
  17    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdlib.h>
  20 #include <string.h>
  21
  22 UNIT *
  23 FUNC (const UNIT *s, size_t n)
  24 {
  25   UNIT *dest;
  26
  27   dest = (UNIT *) malloc (n > 0 ? n * sizeof (UNIT) : 1);
  28   if (dest != NULL)
  29     {
  30 #if 0
  31       UNIT *destptr = dest;
  32
  33       for (; n > 0; n--)
  34         *destptr++ = *s++;
  35 #else
  36       if (n > 0)
  37         memcpy ((char *) dest, (const char *) s, n * sizeof (UNIT));
  38 #endif
  39     }
  40   return dest;
  41 }