nuclear@1: #include <stdio.h>
nuclear@1: #include <stdlib.h>
nuclear@1: #include <optcfg.h>
nuclear@1: 
nuclear@1: enum {
nuclear@1: 	OPT_FOO,
nuclear@1: 	OPT_BAR,
nuclear@1: 	OPT_XYZZY,
nuclear@1: 	OPT_HELP
nuclear@1: };
nuclear@1: 
nuclear@1: struct optcfg_option options[] = {
nuclear@1: 	/* short, long, id, description */
nuclear@1: 	{'f', "foo", OPT_FOO, "foo does nothing really"},
nuclear@1: 	{'b', "bar", OPT_BAR, "bar also does nothing"},
nuclear@1: 	{0, "xyzzy", OPT_XYZZY, "xyzzy doesn't have a short option"},
nuclear@1: 	{'h', "help", OPT_HELP, "print usage and exit"},
nuclear@1: 	{0, 0, -1, 0}	/* terminate with id=-1 */
nuclear@1: };
nuclear@1: 
nuclear@1: int foo, bar;
nuclear@1: int xyzzy;
nuclear@1: 
nuclear@1: int opt_handler(struct optcfg *oc, int opt, void *cls);
nuclear@1: 
nuclear@1: int main(int argc, char **argv)
nuclear@1: {
nuclear@1: 	/* pass the options array to initialize the optcfg object */
nuclear@1: 	struct optcfg *oc = optcfg_init(options);
nuclear@1: 	/* set the option callback function */
nuclear@1: 	optcfg_set_opt_callback(oc, opt_handler, 0);
nuclear@1: 	/* first let's load options from a config file */
nuclear@1: 	printf("parsing config file: example.conf\n");
nuclear@1: 	if(optcfg_parse_config_file(oc, "example.conf") == -1) {
nuclear@1: 		return 1;
nuclear@1: 	}
nuclear@1: 	/* then let's override those with commandline options */
nuclear@1: 	printf("parsing commandline arguments\n");
nuclear@1: 	if(optcfg_parse_args(oc, argc, argv) == -1) {
nuclear@1: 		return 1;
nuclear@1: 	}
nuclear@1: 
nuclear@1: 	printf("\nfoo: %s\n", foo ? "true" : "false");
nuclear@1: 	printf("bar: %s\n", bar ? "true" : "false");
nuclear@1: 	printf("xyzzy: %d\n", xyzzy);
nuclear@1: 
nuclear@1: 	optcfg_destroy(oc);
nuclear@1: 	return 0;
nuclear@1: }
nuclear@1: 
nuclear@1: int opt_handler(struct optcfg *oc, int opt, void *cls)
nuclear@1: {
nuclear@1: 	char *val;
nuclear@1: 
nuclear@1: 	switch(opt) {
nuclear@1: 	case OPT_FOO:
nuclear@1: 		foo = 1;
nuclear@1: 		break;
nuclear@1: 	case OPT_BAR:
nuclear@1: 		bar = 1;
nuclear@1: 		break;
nuclear@1: 	case OPT_XYZZY:
nuclear@1: 		/* this option needs an integer value */
nuclear@1: 		if(!(val = optcfg_next_value(oc)) || optcfg_int_value(val, &xyzzy) == -1) {
nuclear@1: 			fprintf(stderr, "xyzzy must be followed by a number\n");
nuclear@1: 			return -1;
nuclear@1: 		}
nuclear@1: 		break;
nuclear@1: 	case OPT_HELP:
nuclear@1: 		/* print usage and exit */
nuclear@1: 		printf("Usage: example [options]\n");
nuclear@1: 		printf("Options:\n");
nuclear@1: 		optcfg_print_options(oc);
nuclear@1: 		exit(0);
nuclear@1: 	}
nuclear@1: 	return 0;
nuclear@1: }