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https://fuchsia.googlesource.com/third_party/pigweed.googlesource.com/pigweed/pigweed
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9c19db4e78
Added a ByteBuffer module which contains a collection of utilities for manipulating binary data. Change-Id: Ia071c3e68a1ada63232fcb56f3d2d8171bac0778
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
// Copyright 2020 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#include "pw_bytes/byte_builder.h"
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namespace pw {
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void ByteBuilder::clear() {
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size_ = 0;
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status_ = Status::OK;
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last_status_ = Status::OK;
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}
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ByteBuilder& ByteBuilder::append(size_t count, std::byte b) {
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std::byte* const append_destination = &buffer_[size_];
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std::memset(append_destination, static_cast<int>(b), ResizeForAppend(count));
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return *this;
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}
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ByteBuilder& ByteBuilder::append(const void* bytes, size_t count) {
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std::byte* const append_destination = &buffer_[size_];
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std::memcpy(append_destination, bytes, ResizeForAppend(count));
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return *this;
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}
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size_t ByteBuilder::ResizeForAppend(size_t bytes_to_append) {
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const size_t copied = std::min(bytes_to_append, max_size() - size());
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size_ += copied;
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if (buffer_.empty() || bytes_to_append != copied) {
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SetErrorStatus(Status::RESOURCE_EXHAUSTED);
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} else {
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last_status_ = Status::OK;
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}
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return copied;
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}
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void ByteBuilder::resize(size_t new_size) {
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if (new_size <= size_) {
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size_ = new_size;
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last_status_ = Status::OK;
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} else {
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SetErrorStatus(Status::OUT_OF_RANGE);
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}
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}
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void ByteBuilder::CopySizeAndStatus(const ByteBuilder& other) {
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size_ = other.size_;
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status_ = other.status_;
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last_status_ = other.last_status_;
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}
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void ByteBuilder::SetErrorStatus(Status status) {
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last_status_ = status;
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status_ = status;
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}
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} // namespace pw
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