| // Copyright 2020 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_STORAGE_VOLUME_IMAGE_UTILS_WRITER_H_ |
| #define SRC_STORAGE_VOLUME_IMAGE_UTILS_WRITER_H_ |
| |
| #include <lib/fpromise/result.h> |
| #include <lib/stdcompat/span.h> |
| |
| #include <string> |
| |
| namespace storage::volume_image { |
| |
| // Provides a reader interface to abstract platform, and devices particular nuisance to the image |
| // process. |
| // |
| // The reader requires an explicit offset, to allow compatibility with non posix interfaces. |
| class Writer { |
| public: |
| virtual ~Writer() = default; |
| |
| // On success data backing this writer is updated at [|offset|, |offset| + |
| // |buffer.size()|] to |buffer|. |
| // |
| // On error the returned result to contains a string describing the error. |
| virtual fpromise::result<void, std::string> Write(uint64_t offset, |
| cpp20::span<const uint8_t> buffer) = 0; |
| }; |
| |
| } // namespace storage::volume_image |
| |
| #endif // SRC_STORAGE_VOLUME_IMAGE_UTILS_WRITER_H_ |