+gboolean config_key_has_cap(struct sr_dev_driver *driver,
+ const struct sr_dev_inst *sdi, struct sr_channel_group *cg,
+ uint32_t key, uint32_t capability)
+{
+ GVariant *gvar_opts;
+ const uint32_t *opts;
+ gsize num_opts, i;
+ gboolean result;
+
+ if (sr_config_list(driver, sdi, cg, SR_CONF_DEVICE_OPTIONS,
+ &gvar_opts) != SR_OK)
+ return FALSE;
+
+ opts = g_variant_get_fixed_array(gvar_opts, &num_opts, sizeof(uint32_t));
+ result = FALSE;
+ for (i = 0; i < num_opts; i++) {
+ if ((opts[i] & SR_CONF_MASK) == key) {
+ if ((opts[i] & capability) == capability)
+ result = TRUE;
+ else
+ result = FALSE;
+ break;
+ }
+ }
+ g_variant_unref(gvar_opts);
+
+ return result;
+}
+
+int maybe_config_get(struct sr_dev_driver *driver,
+ const struct sr_dev_inst *sdi, struct sr_channel_group *cg,
+ uint32_t key, GVariant **gvar)
+{
+ if (config_key_has_cap(driver, sdi, cg, key, SR_CONF_GET))
+ return sr_config_get(driver, sdi, cg, key, gvar);
+
+ return SR_ERR_NA;
+}
+
+int maybe_config_set(struct sr_dev_driver *driver,
+ const struct sr_dev_inst *sdi, struct sr_channel_group *cg,
+ uint32_t key, GVariant *gvar)
+{
+ if (config_key_has_cap(driver, sdi, cg, key, SR_CONF_SET))
+ return sr_config_set(sdi, cg, key, gvar);
+
+ return SR_ERR_NA;
+}
+
+int maybe_config_list(struct sr_dev_driver *driver,
+ const struct sr_dev_inst *sdi, struct sr_channel_group *cg,
+ uint32_t key, GVariant **gvar)
+{
+ if (config_key_has_cap(driver, sdi, cg, key, SR_CONF_LIST))
+ return sr_config_list(driver, sdi, cg, key, gvar);
+
+ return SR_ERR_NA;
+}
+