| // 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_PYTHON_CC_OUTPUT_STREAM_ADAPTER_H_ |
| #define TINK_PYTHON_CC_OUTPUT_STREAM_ADAPTER_H_ |
| |
| #include <memory> |
| |
| #include "absl/strings/string_view.h" |
| #include "tink/output_stream.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| // Adapts an OutputStream for use in Python. |
| class OutputStreamAdapter { |
| public: |
| explicit OutputStreamAdapter(std::unique_ptr<OutputStream> stream) |
| : stream_(std::move(stream)) {} |
| |
| // Writes 'data' to the underlying OutputStream and returns the number of |
| // bytes written, which may be less than size of 'data'. |
| // It repeatedly calls Next() as long as it returns positive values. This |
| // ensures that in the usual case when we can write all of 'data' the user can |
| // call Write() once and no unnecessary copies are made. |
| util::StatusOr<int64_t> Write(absl::string_view data); |
| |
| // Closes the underlying OutputStream. |
| util::Status Close(); |
| |
| private: |
| std::unique_ptr<OutputStream> stream_; |
| }; |
| |
| } // namespace tink |
| } // namespace crypto |
| |
| #endif // TINK_PYTHON_CC_OUTPUT_STREAM_ADAPTER_H_ |