wcsmbs/wcsncat.c

   1 /* Copyright (C) 1995-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <wchar.h>
  20
  21 #ifndef WCSNCAT
  22 # define WCSNCAT wcsncat
  23 #endif
  24
  25 /* Append no more than N wide-character of SRC onto DEST.  */
  26 wchar_t *
  27 WCSNCAT (wchar_t *dest, const wchar_t *src, size_t n)
  28 {
  29   wchar_t *ret = dest;
  30
  31   /* Find the end of dest.  */
  32   dest += __wcslen (dest);
  33
  34   size_t ds = __wcsnlen (src, n);
  35
  36   dest[ds] = L'\0';
  37   __wmemcpy (dest, src, ds);
  38
  39   return ret;
  40 }