+
+ return SR_OK;
+}
+
+/**
+ * Add a trigger to the specified device (and the specified probe).
+ *
+ * If the specified probe of this device already has a trigger, it will
+ * be silently replaced.
+ *
+ * TODO: Better description.
+ * TODO: Describe valid format of the 'trigger' string.
+ *
+ * @param dev TODO. Must not be NULL.
+ * @param probenum The number of the probe. TODO.
+ * Note that the probe numbers start at 1 (not 0!).
+ * @param trigger TODO.
+ * TODO: Is NULL allowed?
+ *
+ * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR
+ * upon other errors.
+ * If something other than SR_OK is returned, 'dev' is unchanged.
+ */
+SR_API int sr_dev_trigger_set(const struct sr_dev_inst *sdi, int probenum,
+ const char *trigger)
+{
+ GSList *l;
+ struct sr_probe *probe;
+ int ret;
+
+ if (!sdi)
+ return SR_ERR_ARG;
+
+ ret = SR_ERR_ARG;
+ for (l = sdi->probes; l; l = l->next) {
+ probe = l->data;
+ if (probe->index == probenum) {
+ /* If the probe already has a trigger, kill it first. */
+ g_free(probe->trigger);
+ probe->trigger = g_strdup(trigger);
+ ret = SR_OK;
+ break;
+ }
+ }
+
+ return ret;
+}
+
+/**
+ * Determine whether the specified device has the specified capability.
+ *
+ * @param dev Pointer to the device to be checked. Must not be NULL.
+ * If the device's 'driver' field is NULL (virtual device), this
+ * function will always return FALSE (virtual devices don't have
+ * a hardware capabilities list).
+ * @param hwcap The capability that should be checked (whether it's supported
+ * by the specified device).
+ *
+ * @return TRUE, if the device has the specified capability, FALSE otherwise.
+ * FALSE is also returned upon invalid input parameters or other
+ * error conditions.
+ */
+SR_API gboolean sr_dev_has_hwcap(const struct sr_dev *dev, int hwcap)
+{
+ const int *hwcaps;
+ int i;
+
+ sr_spew("dev: %s: requesting hwcap %d", __func__, hwcap);
+
+ if (!dev) {
+ sr_err("dev: %s: dev was NULL", __func__);
+ return FALSE;
+ }
+
+ /*
+ * Virtual devices (which have dev->driver set to NULL) always say that
+ * they don't have the capability (they can't call hwcap_get_all()).
+ */
+ if (!dev->driver) {
+ sr_dbg("dev: %s: dev->driver was NULL, this seems to be "
+ "a virtual device without capabilities", __func__);
+ return FALSE;
+ }
+
+ /* TODO: Sanity check on 'hwcap'. */
+
+ if (dev->driver->info_get(SR_DI_HWCAPS,
+ (const void **)&hwcaps, NULL) != SR_OK) {
+ sr_err("dev: %s: dev has no capabilities", __func__);
+ return FALSE;
+ }
+
+ for (i = 0; hwcaps[i]; i++) {
+ if (hwcaps[i] != hwcap)
+ continue;
+ sr_spew("dev: %s: found hwcap %d", __func__, hwcap);
+ return TRUE;
+ }
+
+ sr_spew("dev: %s: hwcap %d not found", __func__, hwcap);
+
+ return FALSE;