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

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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 (2011-02-05)
parents
children 8250f2777afc
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1 /* Copy a size-bounded wide string.
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2 Copyright (C) 1999, 2011 Free Software Foundation, Inc.
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3 Written by Bruno Haible <bruno@clisp.org>, 1999.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 wchar_t *
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19 wcsncpy (wchar_t *dest, const wchar_t *src, size_t n)
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20 {
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21 wchar_t *destptr = dest;
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22
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23 for (; n > 0 && (*destptr = *src) != (wchar_t)'\0'; src++, destptr++, n--)
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24 ;
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25
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26 /* This behavior is rarely useful, but it is specified by the ISO C
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27 standard. */
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28 for (; n > 0; n--)
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29 *destptr++ = (wchar_t)'\0';
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30
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31 return dest;
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32 }