wcsmbs/mbsinit.c

   1 /* Copyright (C) 1996-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <string.h>
  19 #include <wchar.h>
  20
  21 #undef mbsinit
  22 #undef __mbsinit
  23
  24 /* In GNU libc the conversion functions only can convert between the
  25    fixed wide character representation and the multibyte
  26    representation of the same character set.  Since we use ISO 10646
  27    in UCS4 encoding for wide characters the best solution for
  28    multibyte characters is the UTF8 encoding.  I.e., the only state
  29    information is a counter of the processed bytes so far and the
  30    value collected so far.  Especially, we don't have different shift
  31    states.  */
  32 int
  33 __mbsinit (const mbstate_t *ps)
  34 {
  35   return ps == NULL || ps->__count == 0;
  36 }
  37 weak_alias (__mbsinit, mbsinit)