incidentd can now handle multiple callers asking it for incident reports

Test: bit incident_test:* GtsIncidentManagerTestCases:*
Bug: 123543706
Change-Id: I9f671dd5d8b2ad139f952a23e575c2be16120459
diff --git a/cmds/incidentd/src/proto_util.h b/cmds/incidentd/src/proto_util.h
new file mode 100644
index 0000000..b9df6cb
--- /dev/null
+++ b/cmds/incidentd/src/proto_util.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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 <utils/Errors.h>
+
+#include <google/protobuf/message_lite.h>
+
+#include <vector>
+
+namespace android {
+namespace os {
+namespace incidentd {
+
+using std::vector;
+using google::protobuf::MessageLite;
+
+/**
+ * Write the IncidentHeaderProto section
+ */
+status_t write_header_section(int fd, const vector<uint8_t>& buf);
+
+/**
+ * Write the prologue for a section in the incident report
+ * (This is the proto length-prefixed field format).
+ */
+status_t write_section_header(int fd, int sectionId, size_t size);
+
+/**
+ * Write the given protobuf object as a section.
+ */
+status_t write_section(int fd, int sectionId, const MessageLite& message);
+
+}  // namespace incidentd
+}  // namespace os
+}  // namespace android
+
+