net/spdy/spdy_prefixed_buffer_reader.h

   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
  11 namespace net {
  12
  13 // Reader class which simplifies reading contiguously from
  14 // from a disjoint buffer prefix & suffix.
  15 class 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_