| // 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_GUID_H_ |
| #define SRC_STORAGE_VOLUME_IMAGE_UTILS_GUID_H_ |
| |
| #include <lib/fit/result.h> |
| |
| #include <array> |
| #include <cstdint> |
| #include <string_view> |
| |
| #include <fbl/span.h> |
| |
| namespace storage::volume_image { |
| |
| // Size in bytes of a GUID. |
| constexpr uint8_t kGuidLength = 16; |
| |
| // Number of characters that String representation of GUID have. |
| // AAAAAAAA-BBBB-CCCC-DDDD-EEEEEEEEEEEE |
| constexpr uint8_t kGuidSeparatorCount = 4; |
| constexpr uint8_t kGuidCharactersPerByte = 2; |
| constexpr uint8_t kGuidStrLength = kGuidLength * kGuidCharactersPerByte + kGuidSeparatorCount; |
| |
| struct Guid { |
| // Returns a string containing the representation of |guid|. |
| // |
| // On error returns a string describing the error condition. |
| static fit::result<std::string, std::string> ToString(fbl::Span<const uint8_t> guid); |
| |
| // Returns an array containing the byte representation of |guid|. |
| // |
| // On error returns a string describing the error condition. |
| static fit::result<std::array<uint8_t, kGuidLength>, std::string> FromString( |
| fbl::Span<const char> guid); |
| }; |
| |
| } // namespace storage::volume_image |
| |
| #endif // SRC_STORAGE_VOLUME_IMAGE_UTILS_GUID_H_ |