diff options
Diffstat (limited to 'windows/src/getopt.c')
| -rw-r--r-- | windows/src/getopt.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/windows/src/getopt.c b/windows/src/getopt.c new file mode 100644 index 000000000..fbd86104a --- /dev/null +++ b/windows/src/getopt.c @@ -0,0 +1,117 @@ +// Put this in a separate .h file (called "getopt.h"). +// The prototype for the header file is: +/* +#ifndef GETOPT_H +#define GETOPT_H + +int getopt(int nargc, char * const nargv[], const char *ostr) ; + +#endif +*/ + +#include "getopt.h" // make sure you construct the header file as dictated above + +/* +* 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. All advertising materials mentioning features or use of this software +* must display the following acknowledgement: +* This product includes software developed by the University of +* California, Berkeley and its contributors. +* 4. 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. +*/ + +#include <string.h> +#include <stdio.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 nargc, char * const nargv[], const char *ostr) +{ + static char *place = EMSG; /* option letter processing */ + const char *oli; /* option letter list index */ + + if (optreset || !*place) { /* update scanning pointer */ + optreset = 0; + if (optind >= nargc || *(place = nargv[optind]) != '-') { + place = EMSG; + return (-1); + } + if (place[1] && *++place == '-') { /* found "--" */ + ++optind; + place = EMSG; + return (-1); + } + } /* option letter okay? */ + if ((optopt = (int)*place++) == (int)':' || + !(oli = strchr(ostr, optopt))) { + /* + * if the user didn't specify '-' as an option, + * assume it means -1. + */ + if (optopt == (int)'-') + return (-1); + if (!*place) + ++optind; + if (opterr && *ostr != ':') + (void)printf("illegal option -- %c\n", optopt); + return (BADCH); + } + if (*++oli != ':') { /* don't need argument */ + optarg = NULL; + if (!*place) + ++optind; + } + else { /* need an argument */ + if (*place) /* no white space */ + optarg = place; + else if (nargc <= ++optind) { /* no arg */ + place = EMSG; + if (*ostr == ':') + return (BADARG); + if (opterr) + (void)printf("option requires an argument -- %c\n", optopt); + return (BADCH); + } + else /* white space */ + optarg = nargv[optind]; + place = EMSG; + ++optind; + } + return (optopt); /* dump back option letter */ +} |