mirror of
https://github.com/vale981/ray
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7237ec4124
* Add Python and Redis submodules, and remove old third-party modules
* Update VS projects (WARNING: references files that do not exist yet)
* Update code & add shims for APIs except AF_UNIX/{send,recv}msg()
* Minor style changes.
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/* http://stackoverflow.com/a/17195644/541686 */
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#include <string.h>
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#include <stdio.h>
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int opterr = 1, /* if error message should be printed */
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optind = 1, /* index into parent argv vector */
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optopt, /* character checked for validity */
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optreset; /* reset getopt */
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char *optarg; /* argument associated with option */
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#define BADCH (int) '?'
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#define BADARG (int) ':'
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#define EMSG ""
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/*
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* getopt --
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* Parse argc/argv argument vector.
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*/
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int getopt(int nargc, char *const nargv[], const char *ostr) {
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static char *place = EMSG; /* option letter processing */
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const char *oli; /* option letter list index */
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if (optreset || !*place) { /* update scanning pointer */
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optreset = 0;
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if (optind >= nargc || *(place = nargv[optind]) != '-') {
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place = EMSG;
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return (-1);
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}
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if (place[1] && *++place == '-') { /* found "--" */
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++optind;
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place = EMSG;
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return (-1);
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}
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} /* option letter okay? */
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if ((optopt = (int) *place++) == (int) ':' || !(oli = strchr(ostr, optopt))) {
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/*
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* if the user didn't specify '-' as an option,
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* assume it means -1.
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*/
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if (optopt == (int) '-')
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return (-1);
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if (!*place)
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++optind;
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if (opterr && *ostr != ':')
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(void) printf("illegal option -- %c\n", optopt);
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return (BADCH);
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}
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if (*++oli != ':') { /* don't need argument */
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optarg = NULL;
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if (!*place)
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++optind;
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} else { /* need an argument */
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if (*place) /* no white space */
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optarg = place;
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else if (nargc <= ++optind) { /* no arg */
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place = EMSG;
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if (*ostr == ':')
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return (BADARG);
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if (opterr)
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(void) printf("option requires an argument -- %c\n", optopt);
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return (BADCH);
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} else /* white space */
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optarg = nargv[optind];
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place = EMSG;
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++optind;
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}
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return (optopt); /* dump back option letter */
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}
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