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Diffstat (limited to 'tiff/port/getopt.c')
-rwxr-xr-x | tiff/port/getopt.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/tiff/port/getopt.c b/tiff/port/getopt.c new file mode 100755 index 0000000..6eff8ee --- /dev/null +++ b/tiff/port/getopt.c @@ -0,0 +1,125 @@ +/* $Id: getopt.c,v 1.3 2009-01-22 20:53:07 fwarmerdam Exp $ */ + +/* + * Copyright (c) 1987, 1993, 1994 + * 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. + */ + +#if 0 +static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95"; +__RCSID("$NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $"); +#endif + +#include <stdio.h> +#include <string.h> +#include "libport.h" + +int opterr = 1, /* if error message should be printed */ + optind = 1, /* index into parent argv vector */ + optopt, /* character checked for validity */ + optreset; /* reset getopt */ +char *optarg; /* argument associated with option */ + +#define BADCH (int)'?' +#define BADARG (int)':' +#define EMSG "" + +/* + * getopt -- + * Parse argc/argv argument vector. + */ +int +getopt(int argc, char * const argv[], const char *optstring) +{ + static char *place = EMSG; /* option letter processing */ + char *oli; /* option letter list index */ + + if (optreset || *place == 0) { /* update scanning pointer */ + optreset = 0; + place = argv[optind]; + if (optind >= argc || *place++ != '-') { + /* Argument is absent or is not an option */ + place = EMSG; + return (-1); + } + optopt = *place++; + if (optopt == '-' && *place == 0) { + /* "--" => end of options */ + ++optind; + place = EMSG; + return (-1); + } + if (optopt == 0) { + /* Solitary '-', treat as a '-' option + if the program (eg su) is looking for it. */ + place = EMSG; + if (strchr(optstring, '-') == NULL) + return -1; + optopt = '-'; + } + } else + optopt = *place++; + + /* See if option letter is one the caller wanted... */ + if (optopt == ':' || (oli = strchr(optstring, optopt)) == NULL) { + if (*place == 0) + ++optind; + if (opterr && *optstring != ':') + (void)fprintf(stderr, + "unknown option -- %c\n", optopt); + return (BADCH); + } + + /* Does this option need an argument? */ + if (oli[1] != ':') { + /* don't need argument */ + optarg = NULL; + if (*place == 0) + ++optind; + } else { + /* Option-argument is either the rest of this argument or the + entire next argument. */ + if (*place) + optarg = place; + else if (argc > ++optind) + optarg = argv[optind]; + else { + /* option-argument absent */ + place = EMSG; + if (*optstring == ':') + return (BADARG); + if (opterr) + (void)fprintf(stderr, + "option requires an argument -- %c\n", + optopt); + return (BADCH); + } + place = EMSG; + ++optind; + } + return (optopt); /* return option letter */ +} |