1 /*
2  * Copyright (C) 2019 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 #pragma once
18 
19 #include <stdint.h>
20 
21 #include <unwindstack/Memory.h>
22 
23 namespace unwindstack {
24 
25 class MemoryFileAtOffset : public Memory {
26  public:
27   MemoryFileAtOffset() = default;
28   virtual ~MemoryFileAtOffset();
29 
30   bool Init(const std::string& file, uint64_t offset, uint64_t size = UINT64_MAX);
31 
32   uint8_t* GetPtr(size_t addr = 0) override { return addr < size_ ? data_ + addr : nullptr; }
33 
34   size_t Read(uint64_t addr, void* dst, size_t size) override;
35 
Size()36   size_t Size() { return size_; }
37 
38   void Clear() override;
39 
40  protected:
41   size_t size_ = 0;
42   size_t offset_ = 0;
43   uint8_t* data_ = nullptr;
44 };
45 
46 }  // namespace unwindstack
47