projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 8414a40c VZ |
1 | /* $Id$ */ |
| 2 | ||
| 3 | /* | |
| 4 | * Copyright (c) 1987, 1993, 1994 | |
| 5 | * The Regents of the University of California. All rights reserved. | |
| 6 | * | |
| 7 | * Redistribution and use in source and binary forms, with or without | |
| 8 | * modification, are permitted provided that the following conditions | |
| 9 | * are met: | |
| 10 | * 1. Redistributions of source code must retain the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer. | |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 | * notice, this list of conditions and the following disclaimer in the | |
| 14 | * documentation and/or other materials provided with the distribution. | |
| 15 | * 3. Neither the name of the University nor the names of its contributors | |
| 16 | * may be used to endorse or promote products derived from this software | |
| 17 | * without specific prior written permission. | |
| 18 | * | |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 29 | * SUCH DAMAGE. | |
| 30 | */ | |
| 31 | ||
| 32 | #if 0 | |
| 33 | static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95"; | |
| 34 | __RCSID("$NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $"); | |
| 35 | #endif | |
| 36 | ||
| 37 | #include <stdio.h> | |
| 38 | #include <string.h> | |
| 80ed523f | 39 | #include "libport.h" |
| 8414a40c VZ |
40 | |
| 41 | int opterr = 1, /* if error message should be printed */ | |
| 42 | optind = 1, /* index into parent argv vector */ | |
| 43 | optopt, /* character checked for validity */ | |
| 44 | optreset; /* reset getopt */ | |
| 45 | char *optarg; /* argument associated with option */ | |
| 46 | ||
| 47 | #define BADCH (int)'?' | |
| 48 | #define BADARG (int)':' | |
| 49 | #define EMSG "" | |
| 50 | ||
| 51 | /* | |
| 52 | * getopt -- | |
| 53 | * Parse argc/argv argument vector. | |
| 54 | */ | |
| 55 | int | |
| 56 | getopt(int argc, char * const argv[], const char *optstring) | |
| 57 | { | |
| 58 | static char *place = EMSG; /* option letter processing */ | |
| 59 | char *oli; /* option letter list index */ | |
| 60 | ||
| 61 | if (optreset || *place == 0) { /* update scanning pointer */ | |
| 62 | optreset = 0; | |
| 63 | place = argv[optind]; | |
| 64 | if (optind >= argc || *place++ != '-') { | |
| 65 | /* Argument is absent or is not an option */ | |
| 66 | place = EMSG; | |
| 67 | return (-1); | |
| 68 | } | |
| 69 | optopt = *place++; | |
| 70 | if (optopt == '-' && *place == 0) { | |
| 71 | /* "--" => end of options */ | |
| 72 | ++optind; | |
| 73 | place = EMSG; | |
| 74 | return (-1); | |
| 75 | } | |
| 76 | if (optopt == 0) { | |
| 77 | /* Solitary '-', treat as a '-' option | |
| 78 | if the program (eg su) is looking for it. */ | |
| 79 | place = EMSG; | |
| 80 | if (strchr(optstring, '-') == NULL) | |
| 81 | return -1; | |
| 82 | optopt = '-'; | |
| 83 | } | |
| 84 | } else | |
| 85 | optopt = *place++; | |
| 86 | ||
| 87 | /* See if option letter is one the caller wanted... */ | |
| 88 | if (optopt == ':' || (oli = strchr(optstring, optopt)) == NULL) { | |
| 89 | if (*place == 0) | |
| 90 | ++optind; | |
| 91 | if (opterr && *optstring != ':') | |
| 92 | (void)fprintf(stderr, | |
| 93 | "unknown option -- %c\n", optopt); | |
| 94 | return (BADCH); | |
| 95 | } | |
| 96 | ||
| 97 | /* Does this option need an argument? */ | |
| 98 | if (oli[1] != ':') { | |
| 99 | /* don't need argument */ | |
| 100 | optarg = NULL; | |
| 101 | if (*place == 0) | |
| 102 | ++optind; | |
| 103 | } else { | |
| 104 | /* Option-argument is either the rest of this argument or the | |
| 105 | entire next argument. */ | |
| 106 | if (*place) | |
| 107 | optarg = place; | |
| 108 | else if (argc > ++optind) | |
| 109 | optarg = argv[optind]; | |
| 110 | else { | |
| 111 | /* option-argument absent */ | |
| 112 | place = EMSG; | |
| 113 | if (*optstring == ':') | |
| 114 | return (BADARG); | |
| 115 | if (opterr) | |
| 116 | (void)fprintf(stderr, | |
| 117 | "option requires an argument -- %c\n", | |
| 118 | optopt); | |
| 119 | return (BADCH); | |
| 120 | } | |
| 121 | place = EMSG; | |
| 122 | ++optind; | |
| 123 | } | |
| 124 | return (optopt); /* return option letter */ | |
| 125 | } |