1 /*
2 *
3 * Copyright 2020, 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/msg_formatting.h>
19
20 namespace teeui {
21 namespace msg {
22
zero(volatile uint8_t * begin,const volatile uint8_t * end)23 void zero(volatile uint8_t* begin, const volatile uint8_t* end) {
24 while (begin != end) {
25 *begin++ = 0x0;
26 }
27 }
28
write(WriteStream out,const uint8_t * buffer,uint32_t size)29 WriteStream write(WriteStream out, const uint8_t* buffer, uint32_t size) {
30 if (out.insertFieldSize(size)) {
31 auto pos = out.pos();
32 out += size;
33 if (out) {
34 std::copy(buffer, buffer + size, pos);
35 }
36 }
37 return out;
38 }
39
read(ReadStream in)40 std::tuple<ReadStream, ReadStream::ptr_t, uint32_t> read(ReadStream in) {
41 auto size = in.extractFieldSize();
42 auto pos = in.pos();
43 in += size;
44 return {in, pos, size};
45 }
46
47 } // namespace msg
48 } // namespace teeui
49