Import of the watch repository from Pebble

src/libutil/build_id.c

@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+
+#include "util/build_id.h"
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+bool build_id_contains_gnu_build_id(const ElfExternalNote *note) {
+  const uint32_t NT_GNU_BUILD_ID = 3;
+  const char *expected_name = "GNU";
+  const uint32_t expected_name_length = strlen(expected_name) + 1;
+  return note->type == NT_GNU_BUILD_ID &&
+         note->name_length == expected_name_length &&
+         note->data_length == BUILD_ID_EXPECTED_LEN &&
+         (strncmp((const char *) note->data, expected_name, expected_name_length) == 0);
+}