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[/] [openrisc/] [tags/] [gnu-src/] [newlib-1.18.0/] [newlib-1.18.0-or32-1.0rc1/] [newlib/] [libc/] [string/] [wcsncmp.c] - Rev 345
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/* 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); }