1// Copyright 2014 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.
4
5#ifndef NET_SPDY_SPDY_PREFIXED_BUFFER_READER_H_
6#define NET_SPDY_SPDY_PREFIXED_BUFFER_READER_H_
7
8#include "net/base/net_export.h"
9#include "net/spdy/spdy_pinnable_buffer_piece.h"
10
11namespace net {
12
13// Reader class which simplifies reading contiguously from
14// from a disjoint buffer prefix & suffix.
15class NET_EXPORT_PRIVATE SpdyPrefixedBufferReader {
16 public:
17  SpdyPrefixedBufferReader(const char* prefix, size_t prefix_length,
18                           const char* suffix, size_t suffix_length);
19
20  // Returns number of bytes available to be read.
21  size_t Available();
22
23  // Reads |count| bytes, copying into |*out|. Returns true on success,
24  // false if not enough bytes were available.
25  bool ReadN(size_t count, char* out);
26
27  // Reads |count| bytes, returned in |*out|. Returns true on success,
28  // false if not enough bytes were available.
29  bool ReadN(size_t count, SpdyPinnableBufferPiece* out);
30
31 private:
32  const char* prefix_;
33  const char* suffix_;
34
35  size_t prefix_length_;
36  size_t suffix_length_;
37};
38
39}  // namespace net
40
41#endif  // NET_SPDY_SPDY_PREFIXED_BUFFER_READER_H_
42