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46 lines
911 B
C++
46 lines
911 B
C++
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// Copyright (c) 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/tools/huffman_trie/bit_writer.h"
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#include "base/logging.h"
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namespace net {
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namespace huffman_trie {
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BitWriter::BitWriter() = default;
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BitWriter::~BitWriter() = default;
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void BitWriter::WriteBits(uint32_t bits, uint8_t number_of_bits) {
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DCHECK(number_of_bits <= 32);
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for (uint8_t i = 1; i <= number_of_bits; i++) {
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uint8_t bit = 1 & (bits >> (number_of_bits - i));
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WriteBit(bit);
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}
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}
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void BitWriter::WriteBit(uint8_t bit) {
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current_byte_ |= bit << (7 - used_);
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used_++;
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position_++;
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if (used_ == 8) {
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Flush();
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}
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}
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void BitWriter::Flush() {
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position_ += (8 - used_);
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bytes_.push_back(current_byte_);
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used_ = 0;
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current_byte_ = 0;
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}
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} // namespace huffman_trie
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} // namespace net
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