lib/wcsncpy-impl.h

   1 /* Copy a size-bounded wide string.
   2    Copyright (C) 1999, 2011-2020 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 1999.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 wchar_t *
  19 wcsncpy (wchar_t *dest, const wchar_t *src, size_t n)
  20 {
  21   wchar_t *destptr = dest;
  22
  23   for (; n > 0 && (*destptr = *src) != (wchar_t)'\0'; src++, destptr++, n--)
  24     ;
  25
  26   /* This behavior is rarely useful, but it is specified by the ISO C
  27      standard.  */
  28   for (; n > 0; n--)
  29     *destptr++ = (wchar_t)'\0';
  30
  31   return dest;
  32 }