| 1 | /* |
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| 2 | FUNCTION |
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| 3 | <<wcsrchr>>---wide-character string scanning operation |
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| 4 | |
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| 5 | SYNOPSIS |
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| 6 | #include <wchar.h> |
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| 7 | wchar_t *wcsrchr(const wchar_t *<[s]>, wchar_t <[c]>); |
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| 8 | |
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| 9 | DESCRIPTION |
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| 10 | The <<wcsrchr>> function locates the last occurrence of <[c]> in the |
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| 11 | wide-character string pointed to by <[s]>. The value of <[c]> must be a |
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| 12 | character representable as a type wchar_t and must be a wide-character |
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| 13 | code corresponding to a valid character in the current locale. |
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| 14 | The terminating null wide-character code is considered to be part of |
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| 15 | the wide-character string. |
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| 16 | |
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| 17 | RETURNS |
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| 18 | Upon successful completion, <<wcsrchr>> returns a pointer to the |
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| 19 | wide-character code or a null pointer if <[c]> does not occur in the |
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| 20 | wide-character string. |
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| 21 | |
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| 22 | PORTABILITY |
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| 23 | <<wcsrchr>> is ISO/IEC 9899/AMD1:1995 (ISO C). |
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| 24 | |
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| 25 | No supporting OS subroutines are required. |
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| 26 | */ |
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| 27 | |
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| 28 | /* $NetBSD: wcsrchr.c,v 1.1 2000/12/23 23:14:37 itojun Exp $ */ |
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| 29 | |
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| 30 | /*- |
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| 31 | * Copyright (c)1999 Citrus Project, |
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| 32 | * All rights reserved. |
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| 33 | * |
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| 34 | * Redistribution and use in source and binary forms, with or without |
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| 35 | * modification, are permitted provided that the following conditions |
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| 36 | * are met: |
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| 37 | * 1. Redistributions of source code must retain the above copyright |
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| 38 | * notice, this list of conditions and the following disclaimer. |
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| 39 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 40 | * notice, this list of conditions and the following disclaimer in the |
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| 41 | * documentation and/or other materials provided with the distribution. |
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| 42 | * |
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| 43 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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| 44 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 45 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 46 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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| 47 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 48 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 49 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 50 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 51 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 52 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 53 | * SUCH DAMAGE. |
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| 54 | * |
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| 55 | * citrus Id: wcsrchr.c,v 1.2 2000/12/21 05:07:25 itojun Exp |
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| 56 | */ |
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| 57 | |
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| 58 | #include <_ansi.h> |
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| 59 | #include <stddef.h> |
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| 60 | #include <wchar.h> |
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| 61 | |
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| 62 | wchar_t * |
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| 63 | wcsrchr (const wchar_t * s, |
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| 64 | wchar_t c) |
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| 65 | { |
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| 66 | const wchar_t *p; |
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| 67 | |
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| 68 | p = s; |
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| 69 | while (*p) |
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| 70 | p++; |
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| 71 | while (s <= p) |
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| 72 | { |
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| 73 | if (*p == c) |
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| 74 | { |
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| 75 | /* LINTED interface specification */ |
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| 76 | return (wchar_t *) p; |
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| 77 | } |
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| 78 | p--; |
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| 79 | } |
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| 80 | return NULL; |
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| 81 | } |
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