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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40284755): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif
#include "net/spdy/spdy_read_queue.h"
#include <algorithm>
#include <utility>
#include "base/check_op.h"
#include "net/spdy/spdy_buffer.h"
namespace net {
SpdyReadQueue::SpdyReadQueue() = default;
SpdyReadQueue::~SpdyReadQueue() {
Clear();
}
bool SpdyReadQueue::IsEmpty() const {
DCHECK_EQ(queue_.empty(), total_size_ == 0);
return queue_.empty();
}
size_t SpdyReadQueue::GetTotalSize() const {
return total_size_;
}
void SpdyReadQueue::Enqueue(std::unique_ptr<SpdyBuffer> buffer) {
DCHECK_GT(buffer->GetRemainingSize(), 0u);
total_size_ += buffer->GetRemainingSize();
queue_.push_back(std::move(buffer));
}
size_t SpdyReadQueue::Dequeue(char* out, size_t len) {
DCHECK_GT(len, 0u);
size_t bytes_copied = 0;
while (!queue_.empty() && bytes_copied < len) {
SpdyBuffer* buffer = queue_.front().get();
size_t bytes_to_copy =
std::min(len - bytes_copied, buffer->GetRemainingSize());
memcpy(out + bytes_copied, buffer->GetRemainingData(), bytes_to_copy);
bytes_copied += bytes_to_copy;
if (bytes_to_copy == buffer->GetRemainingSize())
queue_.pop_front();
else
buffer->Consume(bytes_to_copy);
}
total_size_ -= bytes_copied;
return bytes_copied;
}
void SpdyReadQueue::Clear() {
queue_.clear();
total_size_ = 0;
}
} // namespace net
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