lib/unistr/u8-set.c

   1 /* Fill UTF-8 string.
   2    Copyright (C) 2002, 2006, 2009-2021 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2002.
   4
   5    This program is free software: you can redistribute it and/or modify it
   6    under the terms of the GNU Lesser General Public License as published
   7    by the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 /* Specification.  */
  21 #include "unistr.h"
  22
  23 #define FUNC u8_set
  24 #define UNIT uint8_t
  25 #define IS_SINGLE_UNIT(uc) (uc < 0x80)
  26
  27 #include <errno.h>
  28 #include <string.h>
  29
  30 UNIT *
  31 FUNC (UNIT *s, ucs4_t uc, size_t n)
  32 {
  33   if (n > 0)
  34     {
  35       if (IS_SINGLE_UNIT (uc))
  36         memset ((char *) s, uc, n);
  37       else
  38         {
  39           errno = EILSEQ;
  40           return NULL;
  41         }
  42     }
  43   return s;
  44 }