lib/unistr/u8-strnlen.c

   1 /* Determine bounded length of UTF-8 string.
   2    Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2002.
   4
   5    This file is free software.
   6    It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
   7    You can redistribute it and/or modify it under either
   8      - the terms of the GNU Lesser General Public License as published
   9        by the Free Software Foundation, either version 3, or (at your
  10        option) any later version, or
  11      - the terms of the GNU General Public License as published by the
  12        Free Software Foundation; either version 2, or (at your option)
  13        any later version, or
  14      - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  15
  16    This file is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License and the GNU General Public License
  20    for more details.
  21
  22    You should have received a copy of the GNU Lesser General Public
  23    License and of the GNU General Public License along with this
  24    program.  If not, see <https://www.gnu.org/licenses/>.  */
  25
  26 /* Ensure strnlen() gets declared.  */
  27 #ifndef _GNU_SOURCE
  28 # define _GNU_SOURCE 1
  29 #endif
  30
  31 #include <config.h>
  32
  33 /* Specification.  */
  34 #include "unistr.h"
  35
  36 #if __GLIBC__ >= 2 || defined __UCLIBC__
  37
  38 # include <string.h>
  39
  40 size_t
  41 u8_strnlen (const uint8_t *s, size_t maxlen)
  42 {
  43   return strnlen ((const char *) s, maxlen);
  44 }
  45
  46 #else
  47
  48 # define FUNC u8_strnlen
  49 # define UNIT uint8_t
  50 # include "u-strnlen.h"
  51
  52 #endif