| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef GAPIC_STREAM_READER_H |
| #define GAPIC_STREAM_READER_H |
| |
| #include <stdint.h> |
| |
| namespace gapic { |
| |
| // StreamReader is a pure-virtual interface used to read from data streams. |
| class StreamReader { |
| public: |
| // read attempts to read max_size bytes to the pointer data, blocking until |
| // the data is available. Returns the number of bytes successfully read, |
| // which may be less than size if the stream was closed or there was an |
| // error. |
| virtual uint64_t read(void* data, uint64_t max_size) = 0; |
| |
| // read attempts to read the s from the stream, returning true on success or |
| // false if the read was partial or a complete failure. |
| // Note: T must be a plain-old-data type. |
| template <typename T> inline bool read(T& s); |
| |
| protected: |
| virtual ~StreamReader() {} |
| }; |
| |
| template <typename T> |
| inline bool StreamReader::read(T& s) { |
| return read(&s, sizeof(s)) == sizeof(s); |
| } |
| |
| } // namespace gapic |
| |
| #endif // GAPIC_STREAM_READER_H |