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#include "../src/simple-opt.h"
int main(int argc, char **argv)
{
const char *set[] = { "str_a", "str_b", NULL };
/* array containing all options and their types / attributes */
struct simple_opt options[] = {
{ SIMPLE_OPT_FLAG, 'h', "help", false,
"print this help message and exit" },
{ SIMPLE_OPT_BOOL, 'b', "bool", false,
"(optionally) takes a boolean arg!" },
{ SIMPLE_OPT_INT, '\0', "int", true,
"requires an integer. has no short_name!" },
{ SIMPLE_OPT_UNSIGNED, 'u', "uns", true,
"this one has a custom_arg_string. normally it would say"
" \"UNSIGNED\" rather than \"NON-NEG-INT\"",
"NON-NEG-INT" },
{ SIMPLE_OPT_DOUBLE, 'd', "double", true,
"a floating point number" },
{ SIMPLE_OPT_STRING, 's', NULL, true,
"this one doesn't have a long_name version" },
{ SIMPLE_OPT_STRING_SET, '\0', "set-choice", true,
"a choice of one string from a NULL-terminated array",
"(str_a|str_b)", set },
{ SIMPLE_OPT_END },
};
/* contains an enum for identifying simple_opt_parse's return value, an
* array of the cli arguments which were not parsed as options, and
* information relevant for error handling */
struct simple_opt_result result;
int i;
result = simple_opt_parse(argc, argv, options);
/* handle errors */
switch (result.result_type) {
case SIMPLE_OPT_RESULT_UNRECOGNISED_OPTION:
fprintf(stderr, "err: unrecognised option `%s`\n",
result.option_string);
return 1;
case SIMPLE_OPT_RESULT_BAD_ARG:
fprintf(stderr, "err: bad argument `%s` passed to option `%s`\n",
result.argument_string, result.option_string);
return 1;
case SIMPLE_OPT_RESULT_MISSING_ARG:
fprintf(stderr, "err: argument expected for option `%s`\n",
result.option_string);
return 1;
case SIMPLE_OPT_RESULT_OPT_ARG_TOO_LONG:
fprintf(stderr, "internal err: argument passed to option `%s` is too long\n",
result.option_string);
return 1;
case SIMPLE_OPT_RESULT_TOO_MANY_ARGS:
fprintf(stderr, "internal err: too many cli arguments passed\n");
return 1;
case SIMPLE_OPT_RESULT_MALFORMED_OPTION_STRUCT:
fprintf(stderr, "internal err: malformed option struct\n");
return 1;
default:
break;
}
/* if the help flag was passed, print usage */
if (options[0].was_seen) {
simple_opt_print_usage(stdout, 80, argv[0],
"[OPTION]... [--] [NON-OPTION]...",
"This is where you would put an overview description of the "
"program and its general functionality.", options);
return 0;
}
/* print a summary of options passed */
for (i = 0; options[i].type != SIMPLE_OPT_END; i++) {
if (options[i].long_name != NULL)
printf("--%s, ", options[i].long_name);
else
printf("-%c, ", options[i].short_name);
printf("seen: %s", (options[i].was_seen ? "yes" : "no"));
if (options[i].arg_is_stored) {
switch (options[i].type) {
case SIMPLE_OPT_BOOL:
printf(", val: %s", options[i].val_bool ? "true" : "false");
break;
case SIMPLE_OPT_INT:
printf(", val: %ld", options[i].val_int);
break;
case SIMPLE_OPT_UNSIGNED:
printf(", val: %lu", options[i].val_unsigned);
break;
case SIMPLE_OPT_DOUBLE:
printf(", val: %lf", options[i].val_double);
break;
case SIMPLE_OPT_CHAR:
printf(", val: %c", options[i].val_char);
break;
case SIMPLE_OPT_STRING:
printf(", val: %s", options[i].val_string);
break;
case SIMPLE_OPT_STRING_SET:
printf(", val: %s",
options[i].string_set[options[i].val_string_set_idx]);
break;
default:
break;
}
}
puts("");
}
/* if any non-option arguments were passed, print them */
if (result.argc > 0) {
printf("\nnon-options:", result.argc);
for (i = 0; i < result.argc; i++)
printf(" %s", result.argv[i]);
puts("");
}
return 0;
}
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