| 1 | /* |
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| 2 | FUNCTION |
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| 3 | <<wcscmp>>---compare two wide-character strings |
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| 4 | |
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| 5 | SYNOPSIS |
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| 6 | #include <wchar.h> |
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| 7 | int wcscmp(const wchar_t *<[s1]>, *<[s2]>); |
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| 8 | |
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| 9 | DESCRIPTION |
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| 10 | The <<wcscmp>> function compares the wide-character string pointed to |
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| 11 | by <[s1]> to the wide-character string pointed to by <[s2]>. |
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| 12 | |
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| 13 | The sign of a non-zero return value is determined by the sign of the |
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| 14 | difference between the values of the first pair of wide-character codes |
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| 15 | that differ in the objects being compared. |
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| 16 | |
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| 17 | RETURNS |
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| 18 | Upon completion, <<wcscmp>> returns an integer greater than, equal to |
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| 19 | or less than 0, if the wide-character string pointed to by <[s1]> is |
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| 20 | greater than, equal to or less than the wide-character string pointed |
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| 21 | to by <[s2]> respectively. |
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| 22 | |
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| 23 | PORTABILITY |
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| 24 | <<wcscmp>> is ISO/IEC 9899/AMD1:1995 (ISO C). |
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| 25 | |
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| 26 | No supporting OS subroutines are required. |
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| 27 | */ |
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| 28 | |
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| 29 | /* $NetBSD$ */ |
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| 30 | |
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| 31 | /*- |
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| 32 | * Copyright (c) 1990, 1993 |
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| 33 | * The Regents of the University of California. All rights reserved. |
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| 34 | * |
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| 35 | * This code is derived from software contributed to Berkeley by |
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| 36 | * Chris Torek. |
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| 37 | * |
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| 38 | * Redistribution and use in source and binary forms, with or without |
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| 39 | * modification, are permitted provided that the following conditions |
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| 40 | * are met: |
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| 41 | * 1. Redistributions of source code must retain the above copyright |
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| 42 | * notice, this list of conditions and the following disclaimer. |
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| 43 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 44 | * notice, this list of conditions and the following disclaimer in the |
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| 45 | * documentation and/or other materials provided with the distribution. |
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| 46 | * 3. Neither the name of the University nor the names of its contributors |
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| 47 | * may be used to endorse or promote products derived from this software |
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| 48 | * without specific prior written permission. |
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| 49 | * |
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| 50 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 51 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 52 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 53 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 54 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 55 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 56 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 57 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 58 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 59 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 60 | * SUCH DAMAGE. |
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| 61 | */ |
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| 62 | |
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| 63 | #include <_ansi.h> |
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| 64 | #include <wchar.h> |
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| 65 | |
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| 66 | /* |
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| 67 | * Compare strings. |
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| 68 | */ |
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| 69 | int |
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| 70 | wcscmp (const wchar_t * s1, |
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| 71 | const wchar_t * s2) |
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| 72 | { |
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| 73 | |
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| 74 | while (*s1 == *s2++) |
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| 75 | if (*s1++ == 0) |
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| 76 | return (0); |
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| 77 | return (*s1 - *--s2); |
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| 78 | } |
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