wcsmbs/wcsncat.c

   1 /* Copyright (C) 1995-2021 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 <wchar.h>
  19
  20 #ifndef WCSNCAT
  21 # define WCSNCAT wcsncat
  22 #endif
  23
  24 /* Append no more than N wide-character of SRC onto DEST.  */
  25 wchar_t *
  26 WCSNCAT (wchar_t *dest, const wchar_t *src, size_t n)
  27 {
  28   wchar_t *ret = dest;
  29
  30   /* Find the end of dest.  */
  31   dest += __wcslen (dest);
  32
  33   size_t ds = __wcsnlen (src, n);
  34
  35   dest[ds] = L'\0';
  36   __wmemcpy (dest, src, ds);
  37
  38   return ret;
  39 }