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/*
* Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "logging/rtc_event_log/encoder/bit_writer.h"
#include <climits>
#include <cstddef>
#include <cstdint>
#include <string>
#include <utility>
#include "absl/strings/string_view.h"
#include "rtc_base/checks.h"
namespace webrtc {
namespace {
size_t BitsToBytes(size_t bits) {
return (bits / 8) + (bits % 8 > 0 ? 1 : 0);
}
} // namespace
void BitWriter::WriteBits(uint64_t val, size_t bit_count) {
RTC_DCHECK(valid_);
const bool success = bit_writer_.WriteBits(val, bit_count);
RTC_DCHECK(success);
written_bits_ += bit_count;
}
void BitWriter::WriteBits(absl::string_view input) {
RTC_DCHECK(valid_);
for (char c : input) {
WriteBits(static_cast<unsigned char>(c), CHAR_BIT);
}
}
// Returns everything that was written so far.
// Nothing more may be written after this is called.
std::string BitWriter::GetString() {
RTC_DCHECK(valid_);
valid_ = false;
buffer_.resize(BitsToBytes(written_bits_));
written_bits_ = 0;
std::string result;
std::swap(buffer_, result);
return result;
}
} // namespace webrtc
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