| 1 | /* |
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| 2 | FUNCTION |
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| 3 | <<rpmatch>>---determine whether response to question is affirmative or negative |
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| 4 | |
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| 5 | INDEX |
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| 6 | rpmatch |
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| 7 | |
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| 8 | SYNOPSIS |
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| 9 | #include <stdlib.h> |
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| 10 | int rpmatch(const char *<[response]>); |
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| 11 | |
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| 12 | DESCRIPTION |
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| 13 | The <<rpmatch>> function determines whether <[response]> is an affirmative |
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| 14 | or negative response to a question according to the current locale. |
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| 15 | |
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| 16 | RETURNS |
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| 17 | <<rpmatch>> returns 1 if <[response]> is affirmative, 0 if negative, or -1 |
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| 18 | if not recognized as either. |
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| 19 | |
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| 20 | PORTABILITY |
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| 21 | <<rpmatch>> is a BSD extension also found in glibc. |
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| 22 | |
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| 23 | NOTES |
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| 24 | No supporting OS subroutines are required. |
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| 25 | */ |
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| 26 | |
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| 27 | /* This code is originally taken from FreeBSD. */ |
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| 28 | /*- |
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| 29 | * Copyright (c) 2004-2005 Tim J. Robbins. |
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| 30 | * All rights reserved. |
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| 31 | * |
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| 32 | * Redistribution and use in source and binary forms, with or without |
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| 33 | * modification, are permitted provided that the following conditions |
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| 34 | * are met: |
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| 35 | * 1. Redistributions of source code must retain the above copyright |
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| 36 | * notice, this list of conditions and the following disclaimer. |
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| 37 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 38 | * notice, this list of conditions and the following disclaimer in the |
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| 39 | * documentation and/or other materials provided with the distribution. |
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| 40 | * |
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| 41 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 51 | * SUCH DAMAGE. |
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| 52 | */ |
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| 53 | |
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| 54 | #include <sys/cdefs.h> |
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| 55 | #include <sys/types.h> |
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| 56 | |
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| 57 | #include <langinfo.h> |
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| 58 | #include <regex.h> |
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| 59 | #include <stdlib.h> |
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| 60 | |
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| 61 | int |
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| 62 | rpmatch (const char *response) |
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| 63 | { |
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| 64 | regex_t yes, no; |
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| 65 | int ret; |
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| 66 | |
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| 67 | if (regcomp(&yes, nl_langinfo(YESEXPR), REG_EXTENDED|REG_NOSUB) != 0) |
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| 68 | return (-1); |
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| 69 | if (regcomp(&no, nl_langinfo(NOEXPR), REG_EXTENDED|REG_NOSUB) != 0) { |
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| 70 | regfree(&yes); |
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| 71 | return (-1); |
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| 72 | } |
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| 73 | if (regexec(&yes, response, 0, NULL, 0) == 0) |
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| 74 | ret = 1; |
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| 75 | else if (regexec(&no, response, 0, NULL, 0) == 0) |
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| 76 | ret = 0; |
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| 77 | else |
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| 78 | ret = -1; |
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| 79 | regfree(&yes); |
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| 80 | regfree(&no); |
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| 81 | return (ret); |
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| 82 | } |
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