1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "src/protozero/test/fake_scattered_buffer.h"
18
19 #include <sstream>
20 #include <utility>
21
22 #include "test/gtest_and_gmock.h"
23
24 namespace protozero {
25
26 namespace {
27
ToHex(const void * data,size_t length)28 std::string ToHex(const void* data, size_t length) {
29 std::ostringstream ss;
30 ss << std::hex << std::setfill('0');
31 ss << std::uppercase;
32 for (size_t i = 0; i < length; i++) {
33 char c = reinterpret_cast<const char*>(data)[i];
34 ss << std::setw(2) << (static_cast<unsigned>(c) & 0xFF);
35 }
36 return ss.str();
37 }
38
39 } // namespace
40
FakeScatteredBuffer(size_t chunk_size)41 FakeScatteredBuffer::FakeScatteredBuffer(size_t chunk_size)
42 : chunk_size_(chunk_size) {}
43
~FakeScatteredBuffer()44 FakeScatteredBuffer::~FakeScatteredBuffer() {}
45
GetNewBuffer()46 ContiguousMemoryRange FakeScatteredBuffer::GetNewBuffer() {
47 std::unique_ptr<uint8_t[]> chunk(new uint8_t[chunk_size_]);
48 uint8_t* begin = chunk.get();
49 memset(begin, 0, chunk_size_);
50 chunks_.push_back(std::move(chunk));
51 return {begin, begin + chunk_size_};
52 }
53
GetChunkAsString(size_t chunk_index)54 std::string FakeScatteredBuffer::GetChunkAsString(size_t chunk_index) {
55 return ToHex(chunks_[chunk_index].get(), chunk_size_);
56 }
57
GetBytes(size_t start,size_t length,uint8_t * buf)58 void FakeScatteredBuffer::GetBytes(size_t start, size_t length, uint8_t* buf) {
59 ASSERT_LE(start + length, chunks_.size() * chunk_size_);
60 for (size_t pos = 0; pos < length; ++pos) {
61 size_t chunk_index = (start + pos) / chunk_size_;
62 size_t chunk_offset = (start + pos) % chunk_size_;
63 buf[pos] = chunks_[chunk_index].get()[chunk_offset];
64 }
65 }
66
GetBytesAsString(size_t start,size_t length)67 std::string FakeScatteredBuffer::GetBytesAsString(size_t start, size_t length) {
68 std::unique_ptr<uint8_t[]> buffer(new uint8_t[length]);
69 GetBytes(start, length, buffer.get());
70 return ToHex(buffer.get(), length);
71 }
72
73 } // namespace protozero
74