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// 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 {
ByteBuilder& ByteBuilder::append(size_t count, std::byte b) {
std::byte* const append_destination = buffer_.begin() + size_;
std::fill_n(append_destination, ResizeForAppend(count), b);
return *this;
}
ByteBuilder& ByteBuilder::append(const void* bytes, size_t count) {
std::byte* const append_destination = buffer_.begin() + size_;
std::copy_n(static_cast<const std::byte*>(bytes),
ResizeForAppend(count),
append_destination);
return *this;
}
size_t ByteBuilder::ResizeForAppend(size_t bytes_to_append) {
if (!status_.ok()) {
return 0;
}
if (bytes_to_append > max_size() - size()) {
status_ = Status::ResourceExhausted();
return 0;
}
size_ += bytes_to_append;
status_ = OkStatus();
return bytes_to_append;
}
void ByteBuilder::resize(size_t new_size) {
if (new_size <= size_) {
size_ = new_size;
status_ = OkStatus();
} else {
status_ = Status::OutOfRange();
}
}
} // namespace pw