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c065e739e2
Bug: webrtc:13555, webrtc:13082 Change-Id: I9c07708108da0a26f5e228384fd56cef4d1540b3 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/247300 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org> Reviewed-by: Artem Titov <titovartem@webrtc.org> Commit-Queue: (Daniel.L) Byoungchan Lee <daniel.l@hpcnt.com> Cr-Commit-Position: refs/heads/main@{#35749}
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/*
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* Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef LOGGING_RTC_EVENT_LOG_ENCODER_BIT_WRITER_H_
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#define LOGGING_RTC_EVENT_LOG_ENCODER_BIT_WRITER_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <string>
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#include <utility>
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#include "absl/strings/string_view.h"
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#include "rtc_base/bit_buffer.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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// Wrap BitBufferWriter and extend its functionality by (1) keeping track of
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// the number of bits written and (2) owning its buffer.
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class BitWriter final {
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public:
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explicit BitWriter(size_t byte_count)
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: buffer_(byte_count, '\0'),
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bit_writer_(reinterpret_cast<uint8_t*>(&buffer_[0]), buffer_.size()),
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written_bits_(0),
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valid_(true) {
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RTC_DCHECK_GT(byte_count, 0);
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}
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BitWriter(const BitWriter&) = delete;
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BitWriter& operator=(const BitWriter&) = delete;
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void WriteBits(uint64_t val, size_t bit_count);
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void WriteBits(absl::string_view input);
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// Returns everything that was written so far.
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// Nothing more may be written after this is called.
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std::string GetString();
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private:
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std::string buffer_;
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rtc::BitBufferWriter bit_writer_;
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// Note: Counting bits instead of bytes wraps around earlier than it has to,
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// which means the maximum length is lower than it could be. We don't expect
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// to go anywhere near the limit, though, so this is good enough.
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size_t written_bits_;
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bool valid_;
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};
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} // namespace webrtc
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#endif // LOGGING_RTC_EVENT_LOG_ENCODER_BIT_WRITER_H_
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