+/**
+ * Parse a trigger specification string.
+ *
+ * @param dev The device for which the trigger specification is intended.
+ * @param triggerstring The string containing the trigger specification for
+ * one or more probes of this device. Entries for multiple probes are
+ * comma-separated. Triggers are specified in the form key=value,
+ * where the key is a probe number (or probe name) and the value is
+ * the requested trigger type. Valid trigger types currently
+ * include 'r' (rising edge), 'f' (falling edge), 'c' (any pin value
+ * change), '0' (low value), or '1' (high value).
+ * Example: "1=r,sck=f,miso=0,7=c"
+ *
+ * @return Pointer to a list of trigger types (strings), or NULL upon errors.
+ * The pointer list (if non-NULL) has as many entries as the
+ * respective device has probes (all physically available probes,
+ * not just enabled ones). Entries of the list which don't have
+ * a trigger value set in 'triggerstring' are NULL, the other entries
+ * contain the respective trigger type which is requested for the
+ * respective probe (e.g. "r", "c", and so on).
+ */
+SR_API char **sr_parse_triggerstring(struct sr_dev *dev,
+ const char *triggerstring)