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 QUICHE_SPDY_CORE_SPDY_PREFIXED_BUFFER_READER_H_ 6 #define QUICHE_SPDY_CORE_SPDY_PREFIXED_BUFFER_READER_H_ 7 8 #include <stddef.h> 9 10 #include "quiche/common/platform/api/quiche_export.h" 11 #include "quiche/spdy/core/spdy_pinnable_buffer_piece.h" 12 13 namespace spdy { 14 15 // Reader class which simplifies reading contiguously from 16 // from a disjoint buffer prefix & suffix. 17 class QUICHE_EXPORT SpdyPrefixedBufferReader { 18 public: 19 SpdyPrefixedBufferReader(const char* prefix, size_t prefix_length, 20 const char* suffix, size_t suffix_length); 21 22 // Returns number of bytes available to be read. 23 size_t Available(); 24 25 // Reads |count| bytes, copying into |*out|. Returns true on success, 26 // false if not enough bytes were available. 27 bool ReadN(size_t count, char* out); 28 29 // Reads |count| bytes, returned in |*out|. Returns true on success, 30 // false if not enough bytes were available. 31 bool ReadN(size_t count, SpdyPinnableBufferPiece* out); 32 33 private: 34 const char* prefix_; 35 const char* suffix_; 36 37 size_t prefix_length_; 38 size_t suffix_length_; 39 }; 40 41 } // namespace spdy 42 43 #endif // QUICHE_SPDY_CORE_SPDY_PREFIXED_BUFFER_READER_H_ 44