| /* |
| FUNCTION |
| <<wcsncmp>>---compare part of two wide-character strings |
| |
| ANSI_SYNOPSIS |
| #include <wchar.h> |
| int wcsncmp(const wchar_t *<[s1]>, const wchar_t *<[s2]>, size_t <[n]>); |
| |
| TRAD_SYNOPSIS |
| int wcsncmp(<[s1]>, <[s2]>, <[n]> |
| const wchar_t *<[s1]>; |
| const wchar_t *<[s2]>; |
| size_t <[n]>; |
| |
| DESCRIPTION |
| The <<wcsncmp>> function compares not more than <[n]> wide-character |
| codes (wide-character codes that follow a null wide-character code are |
| not compared) from the array pointed to by <[s1]> to the array pointed |
| to by <[s2]>. |
| |
| The sign of a non-zero return value is determined by the sign of the |
| difference between the values of the first pair of wide-character codes |
| that differ in the objects being compared. |
| |
| RETURNS |
| Upon successful completion, <<wcsncmp>> returns an integer greater than, |
| equal to or less than 0, if the possibly null-terminated array pointed |
| to by <[s1]> is greater than, equal to or less than the possibly |
| null-terminated array pointed to by <[s2]> respectively. |
| |
| PORTABILITY |
| <<wcsncmp>> is ISO/IEC 9899/AMD1:1995 (ISO C). |
| |
| No supporting OS subroutines are required. |
| */ |
| |
| /* $NetBSD$ */ |
| |
| /* |
| * Copyright (c) 1989, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <_ansi.h> |
| #include <wchar.h> |
| |
| int |
| _DEFUN (wcsncmp, (s1, s2, n), |
| _CONST wchar_t * s1 _AND |
| _CONST wchar_t * s2 _AND |
| size_t n) |
| { |
| |
| if (n == 0) |
| return (0); |
| do |
| { |
| if (*s1 != *s2++) |
| { |
| return (*s1 - *--s2); |
| } |
| if (*s1++ == 0) |
| break; |
| } |
| while (--n != 0); |
| return (0); |
| } |