1 /*
2 *
3 * Copyright 2019, The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 #include <teeui/generic_messages.h>
19
20 namespace teeui {
21
readU32(ReadStream in)22 std::tuple<ReadStream, uint32_t> readU32(ReadStream in) {
23 volatile const uint32_t* pos = reinterpret_cast<volatile const uint32_t*>(in.pos());
24 in += sizeof(uint32_t);
25 if (!in) return {in, 0};
26 return {in, *pos};
27 }
28
readCommand(ReadStream in)29 std::tuple<ReadStream, Command> readCommand(ReadStream in) {
30 return readCmd<Command>(in);
31 }
32
peakCommand(ReadStream in)33 Command peakCommand(ReadStream in) {
34 auto [_, cmd] = readCommand(in);
35 return cmd;
36 }
37
readProtocol(ReadStream in)38 std::tuple<ReadStream, Protocol> readProtocol(ReadStream in) {
39 return readCmd<Protocol, kProtoInvalid>(in);
40 }
41
peakProtocol(ReadStream in)42 Protocol peakProtocol(ReadStream in) {
43 auto [_, proto] = readProtocol(in);
44 return proto;
45 }
46
47 } // namespace teeui
48