1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "net/spdy/spdy_buffer.h"
9 #include "base/callback.h"
10 #include "base/logging.h"
11 #include "net/base/io_buffer.h"
12 #include "net/spdy/spdy_protocol.h"
18 // Makes a SpdyFrame with |size| bytes of data copied from
19 // |data|. |data| must be non-NULL and |size| must be positive.
20 scoped_ptr<SpdyFrame> MakeSpdyFrame(const char* data, size_t size) {
23 scoped_ptr<char[]> frame_data(new char[size]);
24 std::memcpy(frame_data.get(), data, size);
25 scoped_ptr<SpdyFrame> frame(
26 new SpdyFrame(frame_data.release(), size, true /* owns_buffer */));
32 // This class is an IOBuffer implementation that simply holds a
33 // reference to a SharedFrame object and a fixed offset. Used by
34 // SpdyBuffer::GetIOBufferForRemainingData().
35 class SpdyBuffer::SharedFrameIOBuffer : public IOBuffer {
37 SharedFrameIOBuffer(const scoped_refptr<SharedFrame>& shared_frame,
39 : IOBuffer(shared_frame->data->data() + offset),
40 shared_frame_(shared_frame),
44 virtual ~SharedFrameIOBuffer() {
45 // Prevent ~IOBuffer() from trying to delete |data_|.
49 const scoped_refptr<SharedFrame> shared_frame_;
52 DISALLOW_COPY_AND_ASSIGN(SharedFrameIOBuffer);
55 SpdyBuffer::SpdyBuffer(scoped_ptr<SpdyFrame> frame)
56 : shared_frame_(new SharedFrame()),
58 shared_frame_->data = frame.Pass();
61 // The given data may not be strictly a SPDY frame; we (ab)use
62 // |frame_| just as a container.
63 SpdyBuffer::SpdyBuffer(const char* data, size_t size) :
64 shared_frame_(new SharedFrame()),
66 shared_frame_->data = MakeSpdyFrame(data, size);
69 SpdyBuffer::~SpdyBuffer() {
70 if (GetRemainingSize() > 0)
71 ConsumeHelper(GetRemainingSize(), DISCARD);
74 const char* SpdyBuffer::GetRemainingData() const {
75 return shared_frame_->data->data() + offset_;
78 size_t SpdyBuffer::GetRemainingSize() const {
79 return shared_frame_->data->size() - offset_;
82 void SpdyBuffer::AddConsumeCallback(const ConsumeCallback& consume_callback) {
83 consume_callbacks_.push_back(consume_callback);
86 void SpdyBuffer::Consume(size_t consume_size) {
87 ConsumeHelper(consume_size, CONSUME);
90 IOBuffer* SpdyBuffer::GetIOBufferForRemainingData() {
91 return new SharedFrameIOBuffer(shared_frame_, offset_);
94 void SpdyBuffer::ConsumeHelper(size_t consume_size,
95 ConsumeSource consume_source) {
96 DCHECK_GE(consume_size, 1u);
97 DCHECK_LE(consume_size, GetRemainingSize());
98 offset_ += consume_size;
99 for (std::vector<ConsumeCallback>::const_iterator it =
100 consume_callbacks_.begin(); it != consume_callbacks_.end(); ++it) {
101 it->Run(consume_size, consume_source);