| // Copyright 2019 Google LLC |
| // |
| // 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 TINK_STREAMINGAEAD_SHARED_RANDOM_ACCESS_STREAM_H_ |
| #define TINK_STREAMINGAEAD_SHARED_RANDOM_ACCESS_STREAM_H_ |
| |
| #include "tink/random_access_stream.h" |
| #include "tink/util/buffer.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace streamingaead { |
| |
| // A RandomAccessStream that wraps another RandomAccessStream |
| // as a non-owned pointer. |
| // The wrapper forwards all calls to the wrapped RandomAccessStream, |
| // which must remain alive as long as as the wrapper is in use. |
| class SharedRandomAccessStream : public crypto::tink::RandomAccessStream { |
| public: |
| // Constructs an RandomAccessStream that wraps 'random_access_stream', |
| // and will forward all the method calls to this wrapped stream. |
| explicit SharedRandomAccessStream( |
| crypto::tink::RandomAccessStream* random_access_stream) |
| : random_access_stream_(random_access_stream) {} |
| |
| ~SharedRandomAccessStream() override {} |
| |
| crypto::tink::util::Status PRead( |
| int64_t position, int count, |
| crypto::tink::util::Buffer* dest_buffer) override { |
| return random_access_stream_->PRead(position, count, dest_buffer); |
| } |
| |
| crypto::tink::util::StatusOr<int64_t> size() override { |
| return random_access_stream_->size(); |
| } |
| |
| private: |
| crypto::tink::RandomAccessStream* random_access_stream_; |
| }; |
| |
| } // namespace streamingaead |
| } // namespace tink |
| } // namespace crypto |
| |
| #endif // TINK_STREAMINGAEAD_SHARED_RANDOM_ACCESS_STREAM_H_ |