wcsmbs/wcpncpy.c

   1 /* Copyright (C) 1996-2020 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 #ifdef WCPNCPY
  22 # define __wcpncpy WCPNCPY
  23 #endif
  24
  25 /* Copy no more than N wide-characters of SRC to DEST, returning the
  26    address of the last character written into DEST.  */
  27 wchar_t *
  28 __wcpncpy (wchar_t *dest, const wchar_t *src, size_t n)
  29 {
  30   size_t size = __wcsnlen (src, n);
  31   __wmemcpy (dest, src, size);
  32   dest += size;
  33   if (size == n)
  34     return dest;
  35   return wmemset (dest, L'\0', (n - size));
  36 }
  37
  38 #ifndef WCPNCPY
  39 weak_alias (__wcpncpy, wcpncpy)
  40 #endif