Import of the watch repository from Pebble

src/fw/util/generic_attribute.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "util/attributes.h"
+
+#include <inttypes.h>
+#include <stddef.h>
+
+typedef struct PACKED GenericAttribute {
+  uint8_t id;
+  uint16_t length;
+  uint8_t data[];
+} GenericAttribute;
+
+typedef struct PACKED GenericAttributeList {
+  uint8_t num_attributes;
+  GenericAttribute attributes[];
+} GenericAttributeList;
+
+GenericAttribute *generic_attribute_find_attribute(GenericAttributeList *attr_list, uint8_t id,
+                                                   size_t size);
+
+GenericAttribute *generic_attribute_add_attribute(GenericAttribute *attr, uint8_t id, void *data,
+                                                  size_t size);