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 #ifndef AAPT_IO_FILEINPUTSTREAM_H 18 #define AAPT_IO_FILEINPUTSTREAM_H 19 20 #include "io/Io.h" 21 22 #include <memory> 23 #include <string> 24 25 #include "android-base/macros.h" 26 #include "android-base/unique_fd.h" 27 28 namespace aapt { 29 namespace io { 30 31 class FileInputStream : public InputStream { 32 public: 33 explicit FileInputStream(const std::string& path, size_t buffer_capacity = 4096); 34 35 // Takes ownership of `fd`. 36 explicit FileInputStream(int fd, size_t buffer_capacity = 4096); 37 38 bool Next(const void** data, size_t* size) override; 39 40 void BackUp(size_t count) override; 41 42 size_t ByteCount() const override; 43 44 bool HadError() const override; 45 46 std::string GetError() const override; 47 48 private: 49 DISALLOW_COPY_AND_ASSIGN(FileInputStream); 50 51 android::base::unique_fd fd_; 52 std::string error_; 53 std::unique_ptr<uint8_t[]> buffer_; 54 size_t buffer_capacity_; 55 size_t buffer_offset_; 56 size_t buffer_size_; 57 size_t total_byte_count_; 58 }; 59 60 } // namespace io 61 } // namespace aapt 62 63 #endif // AAPT_IO_FILEINPUTSTREAM_H 64