lib/c32swidth.c

   1 /* Determine number of screen columns needed for a size-bounded 32-bit wide string.
   2    Copyright (C) 2023-2024 Free Software Foundation, Inc.
   3
   4    This file is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as
   6    published by the Free Software Foundation; either version 2.1 of the
   7    License, or (at your option) any later version.
   8
   9    This file 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
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 #define IN_C32SWIDTH
  20 /* Specification.  */
  21 #include <uchar.h>
  22
  23 #if _GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t
  24
  25 # include <wchar.h>
  26
  27 _GL_EXTERN_INLINE
  28 int
  29 c32swidth (const char32_t *s, size_t n)
  30 {
  31   return wcswidth ((const wchar_t *) s, n);
  32 }
  33
  34 #else
  35
  36 # include <limits.h>
  37
  38 # define FUNC c32swidth
  39 # define UNIT char32_t
  40 # define CHARACTER_WIDTH c32width
  41 # include "wcswidth-impl.h"
  42
  43 #endif