wcsmbs/wcpncpy.c

   1 /* Copyright (C) 1996-2022 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 #ifdef WCPNCPY
  21 # define __wcpncpy WCPNCPY
  22 #endif
  23
  24 /* Copy no more than N wide-characters of SRC to DEST, returning the
  25    address of the last character written into DEST.  */
  26 wchar_t *
  27 __wcpncpy (wchar_t *dest, const wchar_t *src, size_t n)
  28 {
  29   size_t size = __wcsnlen (src, n);
  30   __wmemcpy (dest, src, size);
  31   dest += size;
  32   if (size == n)
  33     return dest;
  34   return wmemset (dest, L'\0', (n - size));
  35 }
  36
  37 #ifndef WCPNCPY
  38 weak_alias (__wcpncpy, wcpncpy)
  39 #endif