getopt.c

VLC Player Source Code

                if (optind < argc)
                    optarg = argv[optind++];
                else
                {
                    if (opterr)
                        fprintf(stderr,
                            _("%s: option `%s' requires an argument\n"),
                         argv[0], argv[optind - 1]);
                    nextchar += strlen(nextchar);
                    optopt = pfound->val;
                    return optstring[0] == ':' ? ':' : '?';
                }
            }
            nextchar += strlen(nextchar);
            if (longind != NULL)
                *longind = option_index;
            if (pfound->flag)
            {
                *(pfound->flag) = pfound->val;
                return 0;
            }
            return pfound->val;
        }

        /* Can't find it as a long option.  If this is not getopt_long_only,
           or the option starts with '--' or is not a valid short
           option, then it's an error.
           Otherwise interpret it as a short option.  */
        if (!long_only || argv[optind][1] == '-'
            || my_index(optstring, *nextchar) == NULL)
        {
            if (opterr)
            {
                if (argv[optind][1] == '-')
                    /* --option */
                    fprintf(stderr, _("%s: unrecognized option `%s%s'\n"),
                            "--", argv[0], nextchar);
                else
                {
                    char t[2] = { argv[optind][0], '\0' };
                    /* +option or -option */
                    fprintf(stderr, _("%s: unrecognized option `%s%s'\n"),
                            argv[0], t, nextchar);
                }
            }
            nextchar = (char *) "";
            optind++;
            optopt = 0;
            return '?';
        }
    }

    /* Look at and handle the next short option-character.  */

    {
        char c = *nextchar++;
        char *temp = my_index(optstring, c);

        /* Increment `optind' when we start to process its last character.  */
        if (*nextchar == '\0')
            ++optind;

        if (temp == NULL || c == ':')
        {
            if (opterr)
            {
                if (posixly_correct)
                    /* 1003.2 specifies the format of this message.  */
                    fprintf(stderr, _("%s: illegal option -- %c\n"),
                        argv[0], c);
                else
                    fprintf(stderr, _("%s: invalid option -- %c\n"),
                        argv[0], c);
            }
            optopt = c;
            return '?';
        }
        /* Convenience. Treat POSIX -W foo same as long option --foo */
        if (temp[0] == 'W' && temp[1] == ';')
        {
            char *nameend;
            const struct option *p;
            const struct option *pfound = NULL;
            int exact = 0;
            int ambig = 0;
            int indfound = 0;
            int option_index;

            /* This is an option that requires an argument.  */
            if (*nextchar != '\0')
            {
                optarg = nextchar;
                /* If we end this ARGV-element by taking the rest as an arg,
                   we must advance to the next element now.  */
                optind++;
            }
            else if (optind == argc)
            {
                if (opterr)
                {
                    /* 1003.2 specifies the format of this message.  */
                    fprintf(stderr, _("%s: option requires an argument -- %c\n"),
                        argv[0], c);
                }
                optopt = c;
                if (optstring[0] == ':')
                    c = ':';
                else
                    c = '?';
                return c;
            }
            else
                /* We already incremented `optind' once;
                   increment it again when taking next ARGV-elt as argument.  */
                optarg = argv[optind++];

            /* optarg is now the argument, see if it's in the
               table of longopts.  */

            for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
                /* Do nothing.  */ ;

            /* Test all long options for either exact match
               or abbreviated matches.  */
            for (p = longopts, option_index = 0; p->name; p++, option_index++)
                if (!strncmp(p->name, nextchar, nameend - nextchar))
                {
                    if ((unsigned int) (nameend - nextchar) == strlen(p->name))
                    {
                        /* Exact match found.  */
                        pfound = p;
                        indfound = option_index;
                        exact = 1;
                        break;
                    }
                    else if (pfound == NULL)
                    {
                        /* First nonexact match found.  */
                        pfound = p;
                        indfound = option_index;
                    }
                    else
                        /* Second or later nonexact match found.  */
                        ambig = 1;
                }
            if (ambig && !exact)
            {
                if (opterr)
                    fprintf(stderr, _("%s: option `-W %s' is ambiguous\n"),
                        argv[0], argv[optind]);
                nextchar += strlen(nextchar);
                optind++;
                return '?';
            }
            if (pfound != NULL)
            {
                option_index = indfound;
                if (*nameend)
                {
                    /* Don't test has_arg with >, because some C compilers don't
                       allow it to be used on enums.  */
                    if (pfound->has_arg)
                        optarg = nameend + 1;
                    else
                    {
                        if (opterr)
                            fprintf(stderr, _("\
%s: option `-W %s' doesn't allow an argument\n"),
                                argv[0], pfound->name);

                        nextchar += strlen(nextchar);
                        return '?';
                    }
                }
                else if (pfound->has_arg == 1)
                {
                    if (optind < argc)
                        optarg = argv[optind++];
                    else
                    {
                        if (opterr)
                            fprintf(stderr,
                                _("%s: option `%s' requires an argument\n"),
                                argv[0], argv[optind - 1]);
                        nextchar += strlen(nextchar);
                        return optstring[0] == ':' ? ':' : '?';
                    }
                }
                nextchar += strlen(nextchar);
                if (longind != NULL)
                    *longind = option_index;
                if (pfound->flag)
                {
                    *(pfound->flag) = pfound->val;
                    return 0;
                }
                return pfound->val;
            }
            nextchar = NULL;
            return 'W';    /* Let the application handle it.   */
        }
        if (temp[1] == ':')
        {
            if (temp[2] == ':')
            {
                /* This is an option that accepts an argument optionally.  */
                if (*nextchar != '\0')
                {
                    optarg = nextchar;
                    optind++;
                }
                else
                    optarg = NULL;
                nextchar = NULL;
            }
            else
            {
                /* This is an option that requires an argument.  */
                if (*nextchar != '\0')
                {
                    optarg = nextchar;
                    /* If we end this ARGV-element by taking the rest as an arg,
                       we must advance to the next element now.  */
                    optind++;
                }
                else if (optind == argc)
                {
                    if (opterr)
                    {
                        /* 1003.2 specifies the format of this message.  */
                        fprintf(stderr,
                            _("%s: option requires an argument -- %c\n"),
                            argv[0], c);
                    }
                    optopt = c;
                    if (optstring[0] == ':')
                        c = ':';
                    else
                        c = '?';
                }
                else
                    /* We already incremented `optind' once;
                       increment it again when taking next ARGV-elt as argument.  */
                    optarg = argv[optind++];
                nextchar = NULL;
            }
        }
        return c;
    }
}

int
    getopt(argc, argv, optstring)
     int argc;
     char *const *argv;
     const char *optstring;
{
    return _getopt_internal(argc, argv, optstring,
                (const struct option *) 0,
                (int *) 0,
                0);
}

#endif /* Not ELIDE_CODE.  */

#ifdef TEST

/* Compile with -DTEST to make an executable for use in testing
   the above definition of `getopt'.  */

int
    main(argc, argv)
     int argc;
     char **argv;
{
    int c;
    int digit_optind = 0;

    while (1)
    {
        int this_option_optind = optind ? optind : 1;

        c = getopt(argc, argv, "abc:d:0123456789");
        if (c == -1)
            break;

        switch (c)
        {
            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
                if (digit_optind != 0 && digit_optind != this_option_optind)
                    printf("digits occur in two different argv-elements.\n");
                digit_optind = this_option_optind;
                printf("option %c\n", c);
                break;

            case 'a':
                printf("option a\n");
                break;

            case 'b':
                printf("option b\n");
                break;

            case 'c':
                printf("option c with value `%s'\n", optarg);
                break;

            case '?':
                break;

            default:
                printf("?? getopt returned character code 0%o ??\n", c);
        }
    }

    if (optind < argc)
    {
        printf("non-option ARGV-elements: ");
        while (optind < argc)
            printf("%s ", argv[optind++]);
        printf("\n");
    }

    exit(0);
}

#endif /* TEST */