Function param_subcommand

common/json_param.c:293–336

}

const char *param_subcommand(struct command *cmd, const char *buffer,
			     const jsmntok_t tokens[],
			     const char *name, ...)
{
	va_list ap;
	struct param *params = tal_arr(cmd, struct param, 0);
	const char *arg, **names = tal_arr(tmpctx, const char *, 1);
	const char *subcmd;

	param_add(&params, "subcommand", PARAM_REQUIRED, NULL, NULL,
		  (void *)param_string, &subcmd);
	names[0] = name;
	va_start(ap, name);
	while ((arg = va_arg(ap, const char *)) != NULL)
		tal_arr_expand(&names, arg);
	va_end(ap);

	if (command_usage_only(cmd)) {
		char *usage = tal_strdup(cmd, "subcommand");
		for (size_t i = 0; i < tal_count(names); i++)
			tal_append_fmt(&usage, "%c%s",
				       i == 0 ? '=' : '|', names[i]);
		check_params(params);
		command_set_usage(cmd, usage);
		return NULL;
	}

	/* Check it's valid */
	if (param_arr(cmd, buffer, tokens, params, true) != NULL) {
		return NULL;
	}

	/* Check it's one of the known ones. */
	for (size_t i = 0; i < tal_count(names); i++)
		if (streq(subcmd, names[i]))
			return subcmd;

	/* We really do ignore this. */
	struct command_result *ignore;
	ignore = command_fail(cmd, JSONRPC2_INVALID_PARAMS,
			      "Unknown subcommand '%s'", subcmd);
	assert(ignore);
	return NULL;
}

static bool param_core(struct command *cmd,
		       const char *buffer,