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view lib/wcsncmp-impl.h @ 14290:0da9f0fe36fe
New module 'wcsncmp'.
* modules/wcsncmp: New file.
* lib/wchar.in.h (wcsncmp): New declaration.
* lib/wcsncmp.c: New file.
* lib/wcsncmp-impl.h: New file, from libutf8 with modifications.
* m4/wcsncmp.m4: New file.
* m4/wchar_h.m4 (gl_WCHAR_H): Test whether wcsncmp is declared.
(gl_WCHAR_H_DEFAULTS): Initialize GNULIB_WCSNCMP, HAVE_WCSNCMP.
* modules/wchar (Makefile.am): Substitute GNULIB_WCSNCMP, HAVE_WCSNCMP.
* tests/test-wchar-c++.cc: Test the declaration of wcsncmp.
* doc/posix-functions/wcsncmp.texi: Mention the new module.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sun, 06 Feb 2011 04:47:49 +0100 (2011-02-06) |
parents | |
children | 8250f2777afc |
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/* Compare two wide strings. 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/>. */ int wcsncmp (const wchar_t *s1, const wchar_t *s2, size_t n) { for (; n > 0;) { wchar_t wc1 = *s1++; wchar_t wc2 = *s2++; if (wc1 != (wchar_t)'\0' && wc1 == wc2) { n--; continue; } /* Note that wc1 and wc2 each have at most 31 bits. */ return (int)wc1 - (int)wc2; /* > 0 if wc1 > wc2, < 0 if wc1 < wc2, = 0 if wc1 and wc2 are both '\0'. */ } return 0; }