1  /* Copyright (C) 1995-2023 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 <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  }