view lib/wcsnlen-impl.h @ 14282:3e1169cfa252

New module 'wcsnlen'. * modules/wcsnlen: New file. * lib/wchar.in.h (wcsnlen): New declaration. * lib/wcsnlen.c: New file. * lib/wcsnlen-impl.h: New file, from libutf8 with modifications. * m4/wcsnlen.m4: New file. * m4/wchar_h.m4 (gl_WCHAR_H): Test whether wcsnlen is declared. (gl_WCHAR_H_DEFAULTS): Initialize GNULIB_WCSNLEN, HAVE_WCSNLEN. * modules/wchar (Makefile.am): Substitute GNULIB_WCSNLEN, HAVE_WCSNLEN. * tests/test-wchar-c++.cc: Test the declaration of wcsnlen. * doc/posix-functions/wcsnlen.texi: Mention the new module.
author Bruno Haible <bruno@clisp.org>
date Sat, 05 Feb 2011 13:45:22 +0100
parents
children 8250f2777afc
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/* Determine the length of 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/>.  */

size_t
wcsnlen (const wchar_t *s, size_t maxlen)
{
  const wchar_t *ptr;

  for (ptr = s; maxlen > 0 && *ptr != (wchar_t)'\0'; ptr++, maxlen--)
    ;
  return ptr - s;
}