| // 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. |
| |
| #include "pw_bytes/byte_builder.h" |
| |
| namespace pw { |
| |
| void ByteBuilder::clear() { |
| size_ = 0; |
| status_ = Status::OK; |
| last_status_ = Status::OK; |
| } |
| |
| ByteBuilder& ByteBuilder::append(size_t count, std::byte b) { |
| std::byte* const append_destination = &buffer_[size_]; |
| |
| std::memset(append_destination, static_cast<int>(b), ResizeForAppend(count)); |
| return *this; |
| } |
| |
| ByteBuilder& ByteBuilder::append(const void* bytes, size_t count) { |
| std::byte* const append_destination = &buffer_[size_]; |
| std::memcpy(append_destination, bytes, ResizeForAppend(count)); |
| return *this; |
| } |
| |
| size_t ByteBuilder::ResizeForAppend(size_t bytes_to_append) { |
| const size_t copied = std::min(bytes_to_append, max_size() - size()); |
| size_ += copied; |
| |
| if (buffer_.empty() || bytes_to_append != copied) { |
| SetErrorStatus(Status::RESOURCE_EXHAUSTED); |
| } else { |
| last_status_ = Status::OK; |
| } |
| |
| return copied; |
| } |
| |
| void ByteBuilder::resize(size_t new_size) { |
| if (new_size <= size_) { |
| size_ = new_size; |
| last_status_ = Status::OK; |
| } else { |
| SetErrorStatus(Status::OUT_OF_RANGE); |
| } |
| } |
| |
| void ByteBuilder::CopySizeAndStatus(const ByteBuilder& other) { |
| size_ = other.size_; |
| status_ = other.status_; |
| last_status_ = other.last_status_; |
| } |
| |
| void ByteBuilder::SetErrorStatus(Status status) { |
| last_status_ = status; |
| status_ = status; |
| } |
| |
| } // namespace pw |