21  * options cannot be processed with getopt(). Most implementations
24  * subcommands and continuing parsing of options with another option
40  * Optparse also supports GNU-style long options with optparse_long().
80 void optparse_init(struct optparse *options, char **argv);
92 int optparse(struct optparse *options, const char *optstring);
95  * Handles GNU-style long options in addition to getopt() options.
101 int optparse_long(struct optparse *options,
110  * function. That would be used to parse the options for the
115 char *optparse_arg(struct optparse *options);
125 optparse_error(struct optparse *options, const char *msg, const char *data)  in optparse_error()  argument
130         options->errmsg[p++] = *msg++;  in optparse_error()
132         options->errmsg[p++] = *sep++;  in optparse_error()
133     while (p < sizeof(options->errmsg) - 2 && *data)  in optparse_error()
134         options->errmsg[p++] = *data++;  in optparse_error()
135     options->errmsg[p++] = '\'';  in optparse_error()
136     options->errmsg[p++] = '\0';  in optparse_error()
142 optparse_init(struct optparse *options, char **argv)  in optparse_init()  argument
144     options->argv = argv;  in optparse_init()
145     options->permute = 1;  in optparse_init()
146     options->optind = 1;  in optparse_init()
147     options->subopt = 0;  in optparse_init()
148     options->optarg = 0;  in optparse_init()
149     options->errmsg[0] = '\0';  in optparse_init()
171 optparse_permute(struct optparse *options, int index)  in optparse_permute()  argument
173     char *nonoption = options->argv[index];  in optparse_permute()
175     for (i = index; i < options->optind - 1; i++)  in optparse_permute()
176         options->argv[i] = options->argv[i + 1];  in optparse_permute()
177     options->argv[options->optind - 1] = nonoption;  in optparse_permute()
196 optparse(struct optparse *options, const char *optstring)  in optparse()  argument
200     char *option = options->argv[options->optind];  in optparse()
201     options->errmsg[0] = '\0';  in optparse()
202     options->optopt = 0;  in optparse()
203     options->optarg = 0;  in optparse()
207         options->optind++; /* consume "--" */  in optparse()
210         if (options->permute) {  in optparse()
211             int index = options->optind++;  in optparse()
212             int r = optparse(options, optstring);  in optparse()
213             optparse_permute(options, index);  in optparse()
214             options->optind--;  in optparse()
220     option += options->subopt + 1;  in optparse()
221     options->optopt = option[0];  in optparse()
223     next = options->argv[options->optind + 1];  in optparse()
228         options->optind++;  in optparse()
229         return optparse_error(options, OPTPARSE_MSG_INVALID, str);  in optparse()
233             options->subopt++;  in optparse()
235             options->subopt = 0;  in optparse()
236             options->optind++;  in optparse()
240         options->subopt = 0;  in optparse()
241         options->optind++;  in optparse()
243             options->optarg = option + 1;  in optparse()
245             options->optarg = next;  in optparse()
246             options->optind++;  in optparse()
250             options->optarg = 0;  in optparse()
251             return optparse_error(options, OPTPARSE_MSG_MISSING, str);  in optparse()
255         options->subopt = 0;  in optparse()
256         options->optind++;  in optparse()
258             options->optarg = option + 1;  in optparse()
260             options->optarg = 0;  in optparse()
268 optparse_arg(struct optparse *options)  in optparse_arg()  argument
270     char *option = options->argv[options->optind];  in optparse_arg()
271     options->subopt = 0;  in optparse_arg()
273         options->optind++;  in optparse_arg()
299 /* Unlike strcmp(), handles options containing "=". */
324 optparse_long_fallback(struct optparse *options,  in optparse_long_fallback()  argument
331     result = optparse(options, optstring);  in optparse_long_fallback()
337                 if (longopts[i].shortname == options->optopt)  in optparse_long_fallback()
346 optparse_long(struct optparse *options,  in optparse_long()  argument
351     char *option = options->argv[options->optind];  in optparse_long()
355         options->optind++; /* consume "--" */  in optparse_long()
358         return optparse_long_fallback(options, longopts, longindex);  in optparse_long()
360         if (options->permute) {  in optparse_long()
361             int index = options->optind++;  in optparse_long()
362             int r = optparse_long(options, longopts, longindex);  in optparse_long()
363             optparse_permute(options, index);  in optparse_long()
364             options->optind--;  in optparse_long()
372     options->errmsg[0] = '\0';  in optparse_long()
373     options->optopt = 0;  in optparse_long()
374     options->optarg = 0;  in optparse_long()
376     options->optind++;  in optparse_long()
383             options->optopt = longopts[i].shortname;  in optparse_long()
386                 return optparse_error(options, OPTPARSE_MSG_TOOMANY, name);  in optparse_long()
388                 options->optarg = arg;  in optparse_long()
390                 options->optarg = options->argv[options->optind];  in optparse_long()
391                 if (options->optarg == 0)  in optparse_long()
392                     return optparse_error(options, OPTPARSE_MSG_MISSING, name);  in optparse_long()
394                     options->optind++;  in optparse_long()
396             return options->optopt;  in optparse_long()
399     return optparse_error(options, OPTPARSE_MSG_INVALID, option);  in optparse_long()