view lib/wcsncat-impl.h @ 40211:5f58d2ac35ea

unistr/u8-cmp: Fix undefined behaviour. Reported by Jeffrey Walton <noloader@gmail.com>. * lib/unistr/u8-cmp.c (u8_cmp): Don't invoke memcmp if n is zero.
author Bruno Haible <bruno@clisp.org>
date Fri, 08 Mar 2019 20:38:22 +0100
parents b06060465f09
children
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/* Append part of a wide string to a wide string.
   Copyright (C) 1999, 2011-2019 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 1999.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

wchar_t *
wcsncat (wchar_t *dest, const wchar_t *src, size_t n)
{
  wchar_t *destptr = dest + wcslen (dest);

  for (; n > 0 && (*destptr = *src) != (wchar_t)'\0'; src++, destptr++, n--)
    ;
  if (n == 0)
    *destptr = (wchar_t)'\0';
  return dest;
}