Remove unused QuicFrameList

net/quic/core/quic_frame_list.cc

Index: net/quic/core/quic_frame_list.cc
diff --git a/net/quic/core/quic_frame_list.cc b/net/quic/core/quic_frame_list.cc
deleted file mode 100644
index fc6608e689a99199f9c547815bddb3096a6e26f7..0000000000000000000000000000000000000000
--- a/net/quic/core/quic_frame_list.cc
+++ /dev/null
@@ -1,253 +0,0 @@
-// Copyright (c) 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "net/quic/core/quic_frame_list.h"
-
-#include <algorithm>
-
-#include "base/logging.h"
-
-using std::string;
-
-namespace net {
-
-QuicFrameList::FrameData::FrameData(QuicStreamOffset offset,
-                                    string segment,
-                                    const QuicTime timestamp)
-    : offset(offset), segment(segment), timestamp(timestamp) {}
-
-QuicFrameList::QuicFrameList() {}
-
-QuicFrameList::~QuicFrameList() {
-  Clear();
-}
-
-void QuicFrameList::Clear() {
-  frame_list_.clear();
-  num_bytes_buffered_ = 0;
-}
-
-bool QuicFrameList::Empty() const {
-  return frame_list_.empty();
-}
-
-QuicErrorCode QuicFrameList::OnStreamData(QuicStreamOffset offset,
-                                          base::StringPiece data,
-                                          QuicTime timestamp,
-                                          size_t* const bytes_buffered) {
-  *bytes_buffered = 0;
-  const size_t data_len = data.size();
-  auto insertion_point = FindInsertionPoint(offset, data_len);
-  if (IsDuplicate(offset, data_len, insertion_point)) {
-    return QUIC_NO_ERROR;
-  }
-
-  if (FrameOverlapsBufferedData(offset, data_len, insertion_point)) {
-    return QUIC_INVALID_STREAM_DATA;
-  }
-
-  DVLOG(1) << "Buffering stream data at offset " << offset;
-  // Inserting an empty string and then copying to avoid the extra copy.
-  insertion_point =
-      frame_list_.insert(insertion_point, FrameData(offset, "", timestamp));
-  data.CopyToString(&insertion_point->segment);
-  *bytes_buffered = data_len;
-  num_bytes_buffered_ += data_len;
-  return QUIC_NO_ERROR;
-}
-
-// Finds the place the frame should be inserted.  If an identical frame is
-// present, stops on the identical frame.
-std::list<QuicFrameList::FrameData>::iterator QuicFrameList::FindInsertionPoint(
-    QuicStreamOffset offset,
-    size_t len) {
-  if (frame_list_.empty()) {
-    return frame_list_.begin();
-  }
-  // If it's after all buffered_frames, return the end.
-  if (offset >=
-      (frame_list_.rbegin()->offset + frame_list_.rbegin()->segment.length())) {
-    return frame_list_.end();
-  }
-  auto iter = frame_list_.begin();
-  // Only advance the iterator if the data begins after the already received
-  // frame.  If the new frame overlaps with an existing frame, the iterator will
-  // still point to the frame it overlaps with.
-  while (iter != frame_list_.end() &&
-         offset >= iter->offset + iter->segment.length()) {
-    ++iter;
-  }
-  return iter;
-}
-
-// Returns true if |frame| contains data which overlaps buffered data
-// (indicating an invalid stream frame has been received).
-bool QuicFrameList::FrameOverlapsBufferedData(
-    QuicStreamOffset offset,
-    size_t data_len,
-    std::list<FrameData>::const_iterator insertion_point) const {
-  if (frame_list_.empty() || insertion_point == frame_list_.end()) {
-    return false;
-  }
-  // If there is a buffered frame with a higher starting offset, then check to
-  // see if the new frame overlaps the beginning of the higher frame.
-  if (offset < insertion_point->offset &&
-      offset + data_len > insertion_point->offset) {
-    DVLOG(1) << "New frame overlaps next frame: " << offset << " + " << data_len
-             << " > " << insertion_point->offset;
-    return true;
-  }
-  // If there is a buffered frame with a lower starting offset, then check to
-  // see if the buffered frame runs into the new frame.
-  if (offset >= insertion_point->offset &&
-      offset < insertion_point->offset + insertion_point->segment.length()) {
-    DVLOG(1) << "Preceeding frame overlaps new frame: "
-             << insertion_point->offset << " + "
-             << insertion_point->segment.length() << " > " << offset;
-    return true;
-  }
-
-  return false;
-}
-
-// Returns true if the sequencer has received this frame before.
-bool QuicFrameList::IsDuplicate(
-    QuicStreamOffset offset,
-    size_t data_len,
-    std::list<FrameData>::const_iterator insertion_point) const {
-  // A frame is duplicate if the frame offset is smaller than the bytes consumed
-  // or identical to an already received frame.
-  return offset < total_bytes_read_ || (insertion_point != frame_list_.end() &&
-                                        offset == insertion_point->offset);
-}
-
-int QuicFrameList::GetReadableRegions(struct iovec* iov, int iov_len) const {
-  std::list<FrameData>::const_iterator it = frame_list_.begin();
-  int index = 0;
-  QuicStreamOffset offset = total_bytes_read_;
-  while (it != frame_list_.end() && index < iov_len) {
-    if (it->offset != offset) {
-      return index;
-    }
-
-    iov[index].iov_base =
-        static_cast<void*>(const_cast<char*>(it->segment.data()));
-    iov[index].iov_len = it->segment.size();
-    offset += it->segment.size();
-
-    ++index;
-    ++it;
-  }
-  return index;
-}
-
-bool QuicFrameList::GetReadableRegion(iovec* iov, QuicTime* timestamp) const {
-  std::list<FrameData>::const_iterator it = frame_list_.begin();
-  if (it == frame_list_.end() || it->offset != total_bytes_read_) {
-    return false;
-  }
-  iov->iov_base = static_cast<void*>(const_cast<char*>(it->segment.data()));
-  iov->iov_len = it->segment.size();
-  *timestamp = it->timestamp;
-  return true;
-}
-
-bool QuicFrameList::MarkConsumed(size_t bytes_used) {
-  size_t end_offset = total_bytes_read_ + bytes_used;
-  while (!frame_list_.empty() && end_offset != total_bytes_read_) {
-    std::list<FrameData>::iterator it = frame_list_.begin();
-    if (it->offset != total_bytes_read_) {
-      return false;
-    }
-
-    if (it->offset + it->segment.length() <= end_offset) {
-      total_bytes_read_ += it->segment.length();
-      num_bytes_buffered_ -= it->segment.length();
-      // This chunk is entirely consumed.
-      frame_list_.erase(it);
-      continue;
-    }
-
-    // Partially consume this frame.
-    size_t delta = end_offset - it->offset;
-    total_bytes_read_ += delta;
-    num_bytes_buffered_ -= delta;
-    string new_data = it->segment.substr(delta);
-    const QuicTime timestamp = it->timestamp;
-    frame_list_.erase(it);
-    frame_list_.push_front(FrameData(total_bytes_read_, new_data, timestamp));
-    break;
-  }
-  return true;
-}
-
-size_t QuicFrameList::Readv(const struct iovec* iov, size_t iov_len) {
-  std::list<FrameData>::iterator it = frame_list_.begin();
-  size_t iov_index = 0;
-  size_t iov_offset = 0;
-  size_t frame_offset = 0;
-  QuicStreamOffset initial_bytes_consumed = total_bytes_read_;
-
-  while (iov_index < iov_len && it != frame_list_.end() &&
-         it->offset == total_bytes_read_) {
-    int bytes_to_read = std::min(iov[iov_index].iov_len - iov_offset,
-                                 it->segment.size() - frame_offset);
-
-    char* iov_ptr = static_cast<char*>(iov[iov_index].iov_base) + iov_offset;
-    memcpy(iov_ptr, it->segment.data() + frame_offset, bytes_to_read);
-    frame_offset += bytes_to_read;
-    iov_offset += bytes_to_read;
-
-    if (iov[iov_index].iov_len == iov_offset) {
-      // We've filled this buffer.
-      iov_offset = 0;
-      ++iov_index;
-    }
-    if (it->segment.size() == frame_offset) {
-      // We've copied this whole frame
-      total_bytes_read_ += it->segment.size();
-      num_bytes_buffered_ -= it->segment.size();
-      frame_list_.erase(it);
-      it = frame_list_.begin();
-      frame_offset = 0;
-    }
-  }
-  // Done copying.  If there is a partial frame, update it.
-  if (frame_offset != 0) {
-    frame_list_.push_front(FrameData(it->offset + frame_offset,
-                                     it->segment.substr(frame_offset),
-                                     it->timestamp));
-    frame_list_.erase(it);
-    total_bytes_read_ += frame_offset;
-    num_bytes_buffered_ -= frame_offset;
-  }
-  return total_bytes_read_ - initial_bytes_consumed;
-}
-
-size_t QuicFrameList::FlushBufferedFrames() {
-  QuicStreamOffset initial_bytes_consumed = total_bytes_read_;
-  if (!frame_list_.empty()) {
-    // Consume all of the bytes up to the last byte yet seen, including the
-    // ones that haven't arrived yet.
-    auto it = frame_list_.back();
-    total_bytes_read_ = it.offset + it.segment.length();
-    frame_list_.clear();
-  }
-  return total_bytes_read_ - initial_bytes_consumed;
-}
-
-bool QuicFrameList::HasBytesToRead() const {
-  return !frame_list_.empty() &&
-         frame_list_.begin()->offset == total_bytes_read_;
-}
-
-QuicStreamOffset QuicFrameList::BytesConsumed() const {
-  return total_bytes_read_;
-}
-
-size_t QuicFrameList::BytesBuffered() const {
-  return num_bytes_buffered_;
-}
-
-}  // namespace net