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nuclear@1
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1 #include <stdio.h>
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nuclear@1
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2 #include <stdlib.h>
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nuclear@1
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3 #include <optcfg.h>
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nuclear@1
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4
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nuclear@1
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5 enum {
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nuclear@1
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6 OPT_FOO,
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nuclear@1
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7 OPT_BAR,
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8 OPT_XYZZY,
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9 OPT_HELP
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nuclear@1
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10 };
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nuclear@1
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11
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nuclear@1
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12 struct optcfg_option options[] = {
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nuclear@1
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13 /* short, long, id, description */
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nuclear@1
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14 {'f', "foo", OPT_FOO, "foo does nothing really"},
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nuclear@1
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15 {'b', "bar", OPT_BAR, "bar also does nothing"},
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nuclear@1
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16 {0, "xyzzy", OPT_XYZZY, "xyzzy doesn't have a short option"},
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nuclear@1
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17 {'h', "help", OPT_HELP, "print usage and exit"},
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nuclear@3
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18 OPTCFG_OPTIONS_END
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nuclear@1
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19 };
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nuclear@1
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20
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nuclear@1
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21 int foo, bar;
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nuclear@1
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22 int xyzzy;
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nuclear@1
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23
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nuclear@1
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24 int opt_handler(struct optcfg *oc, int opt, void *cls);
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nuclear@1
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25
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nuclear@1
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26 int main(int argc, char **argv)
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nuclear@1
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27 {
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nuclear@1
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28 /* pass the options array to initialize the optcfg object */
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nuclear@1
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29 struct optcfg *oc = optcfg_init(options);
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nuclear@1
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30 /* set the option callback function */
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nuclear@1
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31 optcfg_set_opt_callback(oc, opt_handler, 0);
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nuclear@1
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32 /* first let's load options from a config file */
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nuclear@1
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33 printf("parsing config file: example.conf\n");
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nuclear@1
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34 if(optcfg_parse_config_file(oc, "example.conf") == -1) {
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nuclear@1
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35 return 1;
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nuclear@1
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36 }
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nuclear@1
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37 /* then let's override those with commandline options */
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nuclear@1
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38 printf("parsing commandline arguments\n");
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nuclear@1
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39 if(optcfg_parse_args(oc, argc, argv) == -1) {
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nuclear@1
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40 return 1;
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nuclear@1
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41 }
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nuclear@1
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42
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nuclear@1
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43 printf("\nfoo: %s\n", foo ? "true" : "false");
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nuclear@1
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44 printf("bar: %s\n", bar ? "true" : "false");
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nuclear@1
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45 printf("xyzzy: %d\n", xyzzy);
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nuclear@1
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46
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nuclear@1
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47 optcfg_destroy(oc);
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nuclear@1
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48 return 0;
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nuclear@1
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49 }
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nuclear@1
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50
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nuclear@1
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51 int opt_handler(struct optcfg *oc, int opt, void *cls)
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nuclear@1
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52 {
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nuclear@1
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53 char *val;
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nuclear@1
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54
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nuclear@1
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55 switch(opt) {
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nuclear@1
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56 case OPT_FOO:
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nuclear@2
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57 optcfg_enabled_value(oc, &foo);
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nuclear@1
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58 break;
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nuclear@1
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59 case OPT_BAR:
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nuclear@2
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60 optcfg_enabled_value(oc, &bar);
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nuclear@1
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61 break;
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nuclear@1
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62 case OPT_XYZZY:
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nuclear@1
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63 /* this option needs an integer value */
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nuclear@1
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64 if(!(val = optcfg_next_value(oc)) || optcfg_int_value(val, &xyzzy) == -1) {
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nuclear@1
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65 fprintf(stderr, "xyzzy must be followed by a number\n");
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nuclear@1
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66 return -1;
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nuclear@1
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67 }
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nuclear@1
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68 break;
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nuclear@1
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69 case OPT_HELP:
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nuclear@1
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70 /* print usage and exit */
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nuclear@1
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71 printf("Usage: example [options]\n");
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nuclear@1
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72 printf("Options:\n");
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nuclear@1
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73 optcfg_print_options(oc);
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nuclear@1
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74 exit(0);
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nuclear@1
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75 }
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nuclear@1
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76 return 0;
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nuclear@1
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77 }
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