lib/unistr/u8-strnlen.c

   1 /* Determine bounded length of UTF-8 string.
   2    Copyright (C) 1999, 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 /* Ensure strnlen() gets declared.  */
  19 #ifndef _GNU_SOURCE
  20 # define _GNU_SOURCE 1
  21 #endif
  22
  23 #include <config.h>
  24
  25 /* Specification.  */
  26 #include "unistr.h"
  27
  28 #if __GLIBC__ >= 2 || defined __UCLIBC__
  29
  30 # include <string.h>
  31
  32 size_t
  33 u8_strnlen (const uint8_t *s, size_t maxlen)
  34 {
  35   return strnlen ((const char *) s, maxlen);
  36 }
  37
  38 #else
  39
  40 # define FUNC u8_strnlen
  41 # define UNIT uint8_t
  42 # include "u-strnlen.h"
  43
  44 #endif