Remove //net (except for Android test stuff) and sdch

net/websockets/websocket_deflater.cc

-// Copyright 2013 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/websockets/websocket_deflater.h"
-
-#include <string.h>
-#include <algorithm>
-#include <deque>
-#include <vector>
-
-#include "base/logging.h"
-#include "net/base/io_buffer.h"
-#include "third_party/zlib/zlib.h"
-
-namespace net {
-
-WebSocketDeflater::WebSocketDeflater(ContextTakeOverMode mode)
-    : mode_(mode), are_bytes_added_(false) {}
-
-WebSocketDeflater::~WebSocketDeflater() {
-  if (stream_) {
-    deflateEnd(stream_.get());
-    stream_.reset(NULL);
-  }
-}
-
-bool WebSocketDeflater::Initialize(int window_bits) {
-  DCHECK(!stream_);
-  stream_.reset(new z_stream);
-
-  DCHECK_LE(8, window_bits);
-  DCHECK_GE(15, window_bits);
-  memset(stream_.get(), 0, sizeof(*stream_));
-  int result = deflateInit2(stream_.get(),
-                            Z_DEFAULT_COMPRESSION,
-                            Z_DEFLATED,
-                            -window_bits,  // Negative value for raw deflate
-                            8,  // default mem level
-                            Z_DEFAULT_STRATEGY);
-  if (result != Z_OK) {
-    deflateEnd(stream_.get());
-    stream_.reset();
-    return false;
-  }
-  const size_t kFixedBufferSize = 4096;
-  fixed_buffer_.resize(kFixedBufferSize);
-  return true;
-}
-
-bool WebSocketDeflater::AddBytes(const char* data, size_t size) {
-  if (!size)
-    return true;
-
-  are_bytes_added_ = true;
-  stream_->next_in = reinterpret_cast<Bytef*>(const_cast<char*>(data));
-  stream_->avail_in = size;
-
-  int result = Deflate(Z_NO_FLUSH);
-  DCHECK(result != Z_BUF_ERROR || !stream_->avail_in);
-  return result == Z_BUF_ERROR;
-}
-
-bool WebSocketDeflater::Finish() {
-  if (!are_bytes_added_) {
-    // Since consecutive calls of deflate with Z_SYNC_FLUSH and no input
-    // lead to an error, we create and return the output for the empty input
-    // manually.
-    buffer_.push_back('\x00');
-    ResetContext();
-    return true;
-  }
-  stream_->next_in = NULL;
-  stream_->avail_in = 0;
-
-  int result = Deflate(Z_SYNC_FLUSH);
-  // Deflate returning Z_BUF_ERROR means that it's successfully flushed and
-  // blocked for input data.
-  if (result != Z_BUF_ERROR) {
-    ResetContext();
-    return false;
-  }
-  // Remove 4 octets from the tail as the specification requires.
-  if (CurrentOutputSize() < 4) {
-    ResetContext();
-    return false;
-  }
-  buffer_.resize(buffer_.size() - 4);
-  ResetContext();
-  return true;
-}
-
-void WebSocketDeflater::PushSyncMark() {
-  DCHECK(!are_bytes_added_);
-  const char data[] = {'\x00', '\x00', '\xff', '\xff'};
-  buffer_.insert(buffer_.end(), &data[0], &data[sizeof(data)]);
-}
-
-scoped_refptr<IOBufferWithSize> WebSocketDeflater::GetOutput(size_t size) {
-  std::deque<char>::iterator begin = buffer_.begin();
-  std::deque<char>::iterator end = begin + std::min(size, buffer_.size());
-
-  scoped_refptr<IOBufferWithSize> result = new IOBufferWithSize(end - begin);
-  std::copy(begin, end, result->data());
-  buffer_.erase(begin, end);
-  return result;
-}
-
-void WebSocketDeflater::ResetContext() {
-  if (mode_ == DO_NOT_TAKE_OVER_CONTEXT)
-    deflateReset(stream_.get());
-  are_bytes_added_ = false;
-}
-
-int WebSocketDeflater::Deflate(int flush) {
-  int result = Z_OK;
-  do {
-    stream_->next_out = reinterpret_cast<Bytef*>(&fixed_buffer_[0]);
-    stream_->avail_out = fixed_buffer_.size();
-    result = deflate(stream_.get(), flush);
-    size_t size = fixed_buffer_.size() - stream_->avail_out;
-    buffer_.insert(buffer_.end(), &fixed_buffer_[0], &fixed_buffer_[0] + size);
-  } while (result == Z_OK);
-  return result;
-}
-
-}  // namespace net