view lib/wcsncpy-impl.h @ 14285:46d0f7a51cc0

New module 'wcsncpy'. * modules/wcsncpy: New file. * lib/wchar.in.h (wcsncpy): New declaration. * lib/wcsncpy.c: New file. * lib/wcsncpy-impl.h: New file, from libutf8 with modifications. * m4/wcsncpy.m4: New file. * m4/wchar_h.m4 (gl_WCHAR_H): Test whether wcsncpy is declared. (gl_WCHAR_H_DEFAULTS): Initialize GNULIB_WCSNCPY, HAVE_WCSNCPY. * modules/wchar (Makefile.am): Substitute GNULIB_WCSNCPY, HAVE_WCSNCPY. * tests/test-wchar-c++.cc: Test the declaration of wcsncpy. * doc/posix-functions/wcsncpy.texi: Mention the new module.
author Bruno Haible <bruno@clisp.org>
date Sat, 05 Feb 2011 15:24:52 +0100
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children 8250f2777afc
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/* Copy a size-bounded wide string.
   Copyright (C) 1999, 2011 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 <http://www.gnu.org/licenses/>.  */

wchar_t *
wcsncpy (wchar_t *dest, const wchar_t *src, size_t n)
{
  wchar_t *destptr = dest;

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

  /* This behavior is rarely useful, but it is specified by the ISO C
     standard.  */
  for (; n > 0; n--)
    *destptr++ = (wchar_t)'\0';

  return dest;
}