adb: factor out socket specification.
Move the logic for string socket specification out to separate
functions to facilitate using arbitrary sockets for the adb command
socket.
Bug: http://b/30445394
Change-Id: Icd8fdb853272edc029fb3a0f5b18e941dc8ef52c
Test: adb_test, adbd_test, test_device.py
diff --git a/socket_spec.h b/socket_spec.h
new file mode 100644
index 0000000..69efb07
--- /dev/null
+++ b/socket_spec.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2016 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 <string>
+
+// Returns true if the argument starts with a plausible socket prefix.
+bool is_socket_spec(const std::string& spec);
+
+int socket_spec_connect(const std::string& spec, std::string* error);
+int socket_spec_listen(const std::string& spec, std::string* error,
+ int* resolved_tcp_port = nullptr);