| // Copyright 2020 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. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "tink/cc/input_stream_adapter.h" |
| |
| #include <algorithm> |
| #include <string> |
| |
| #include "absl/strings/str_cat.h" |
| #include "absl/strings/string_view.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| util::StatusOr<std::string> InputStreamAdapter::Read(int64_t size) { |
| const void* buffer; |
| auto next_result = stream_->Next(&buffer); |
| if (!next_result.ok()) return next_result.status(); |
| int available = next_result.value(); |
| int read_count = |
| size < 0 ? available : std::min(static_cast<int64_t>(available), size); |
| if (read_count < available) stream_->BackUp(available - read_count); |
| return std::string( |
| absl::string_view(static_cast<const char*>(buffer), read_count)); |
| } |
| |
| } // namespace tink |
| } // namespace crypto |