1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/example/example.c	Sat Nov 14 14:12:30 2015 +0200
     1.3 @@ -0,0 +1,77 @@
     1.4 +#include <stdio.h>
     1.5 +#include <stdlib.h>
     1.6 +#include <optcfg.h>
     1.7 +
     1.8 +enum {
     1.9 +	OPT_FOO,
    1.10 +	OPT_BAR,
    1.11 +	OPT_XYZZY,
    1.12 +	OPT_HELP
    1.13 +};
    1.14 +
    1.15 +struct optcfg_option options[] = {
    1.16 +	/* short, long, id, description */
    1.17 +	{'f', "foo", OPT_FOO, "foo does nothing really"},
    1.18 +	{'b', "bar", OPT_BAR, "bar also does nothing"},
    1.19 +	{0, "xyzzy", OPT_XYZZY, "xyzzy doesn't have a short option"},
    1.20 +	{'h', "help", OPT_HELP, "print usage and exit"},
    1.21 +	{0, 0, -1, 0}	/* terminate with id=-1 */
    1.22 +};
    1.23 +
    1.24 +int foo, bar;
    1.25 +int xyzzy;
    1.26 +
    1.27 +int opt_handler(struct optcfg *oc, int opt, void *cls);
    1.28 +
    1.29 +int main(int argc, char **argv)
    1.30 +{
    1.31 +	/* pass the options array to initialize the optcfg object */
    1.32 +	struct optcfg *oc = optcfg_init(options);
    1.33 +	/* set the option callback function */
    1.34 +	optcfg_set_opt_callback(oc, opt_handler, 0);
    1.35 +	/* first let's load options from a config file */
    1.36 +	printf("parsing config file: example.conf\n");
    1.37 +	if(optcfg_parse_config_file(oc, "example.conf") == -1) {
    1.38 +		return 1;
    1.39 +	}
    1.40 +	/* then let's override those with commandline options */
    1.41 +	printf("parsing commandline arguments\n");
    1.42 +	if(optcfg_parse_args(oc, argc, argv) == -1) {
    1.43 +		return 1;
    1.44 +	}
    1.45 +
    1.46 +	printf("\nfoo: %s\n", foo ? "true" : "false");
    1.47 +	printf("bar: %s\n", bar ? "true" : "false");
    1.48 +	printf("xyzzy: %d\n", xyzzy);
    1.49 +
    1.50 +	optcfg_destroy(oc);
    1.51 +	return 0;
    1.52 +}
    1.53 +
    1.54 +int opt_handler(struct optcfg *oc, int opt, void *cls)
    1.55 +{
    1.56 +	char *val;
    1.57 +
    1.58 +	switch(opt) {
    1.59 +	case OPT_FOO:
    1.60 +		foo = 1;
    1.61 +		break;
    1.62 +	case OPT_BAR:
    1.63 +		bar = 1;
    1.64 +		break;
    1.65 +	case OPT_XYZZY:
    1.66 +		/* this option needs an integer value */
    1.67 +		if(!(val = optcfg_next_value(oc)) || optcfg_int_value(val, &xyzzy) == -1) {
    1.68 +			fprintf(stderr, "xyzzy must be followed by a number\n");
    1.69 +			return -1;
    1.70 +		}
    1.71 +		break;
    1.72 +	case OPT_HELP:
    1.73 +		/* print usage and exit */
    1.74 +		printf("Usage: example [options]\n");
    1.75 +		printf("Options:\n");
    1.76 +		optcfg_print_options(oc);
    1.77 +		exit(0);
    1.78 +	}
    1.79 +	return 0;
    1.80 +}