Added a function to find a device which starts with a given name

dtree.c

@@ -54,6 +54,24 @@ struct dtree_dev_t *dtree_byname(const char *name)
 	return curr;
 }
 
+struct dtree_dev_t *dtree_byname_prefix(const char *name_prefix)
+{
+	struct dtree_dev_t *curr = NULL;
+	int string_length = strlen(name_prefix);
+
+	if(name_prefix == NULL || string_length == 0)
+		return NULL;
+
+	while((curr = dtree_next()) != NULL) {
+		if(!strncmp(name_prefix, curr->name, string_length))
+			break;
+
+		dtree_dev_free(curr);
+	}
+
+	return curr;
+}
+
 static
 int is_compatible(const struct dtree_dev_t *dev, const char *compat)
 {

dtree.h

@@ -137,6 +137,20 @@ struct dtree_dev_t *dtree_next(void);
  */
 struct dtree_dev_t *dtree_byname(const char *name);
 
+/**
+ * Look up for device which starts with the name prefix.
+ * Returns the first occurence of device with the given
+ * name prefix.
+ * The entry should be free'd by dtree_dev_free().
+ *
+ * Uses shared internal iterator.
+ * To search from beginning call dtree_reset().
+ *
+ * Returns NULL when not found or on error.
+ * On error sets error state.
+ */
+struct dtree_dev_t *dtree_byname_prefix(const char *name_prefix);
+
 /**
  * Looks up for device compatible with the given type.
  * The entry should be free'd by dtree_dev_free().