| // Copyright 2020 The Pigweed Authors |
| // |
| // 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 |
| // |
| // https://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. |
| #pragma once |
| |
| #include <cstddef> |
| |
| namespace pw::hdlc_lite { |
| |
| inline constexpr std::byte kFlag = std::byte{0x7E}; |
| inline constexpr std::byte kEscape = std::byte{0x7D}; |
| |
| inline constexpr std::array<std::byte, 2> kEscapedFlag = {kEscape, |
| std::byte{0x5E}}; |
| inline constexpr std::array<std::byte, 2> kEscapedEscape = {kEscape, |
| std::byte{0x5D}}; |
| |
| constexpr bool NeedsEscaping(std::byte b) { |
| return (b == kFlag || b == kEscape); |
| } |
| |
| } // namespace pw::hdlc_lite |
