Landing Recent QUIC changes until 3:35 PM, Apr 26, 2017 UTC-4

net/quic/core/quic_data_writer.h

 // Copyright (c) 2012 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.
 
 #ifndef NET_QUIC_CORE_QUIC_DATA_WRITER_H_
 #define NET_QUIC_CORE_QUIC_DATA_WRITER_H_
 
 #include <cstddef>
 #include <cstdint>
 #include <string>
 
 #include "base/macros.h"
 #include "net/base/int128.h"
 #include "net/quic/core/quic_packets.h"
+#include "net/quic/platform/api/quic_endian.h"
 #include "net/quic/platform/api/quic_export.h"
 #include "net/quic/platform/api/quic_string_piece.h"
 
 namespace net {
 
 // This class provides facilities for packing QUIC data.
 //
 // The QuicDataWriter supports appending primitive values (int, string, etc)
 // to a frame instance.  The internal memory buffer is exposed as the "data"
 // of the QuicDataWriter.
 class QUIC_EXPORT_PRIVATE QuicDataWriter {
  public:
   // Creates a QuicDataWriter where |buffer| is not owned.
-  QuicDataWriter(size_t size, char* buffer, Perspective perspective);
+  QuicDataWriter(size_t size,
+                 char* buffer,
+                 Perspective perspective,
+                 Endianness endianness);
 
   ~QuicDataWriter();
 
   // Returns the size of the QuicDataWriter's data.
   size_t length() const { return length_; }
 
   // Retrieves the buffer from the QuicDataWriter without changing ownership.
   char* data();
 
   // Methods for adding to the payload.  These values are appended to the end
-  // of the QuicDataWriter payload. Note - binary integers are written in
-  // host byte order (little endian) not network byte order (big endian).
+  // of the QuicDataWriter payload.
+
+  // Writes 8/16/32/64-bit unsigned integers.
   bool WriteUInt8(uint8_t value);
   bool WriteUInt16(uint16_t value);
   bool WriteUInt32(uint32_t value);
-  bool WriteUInt48(uint64_t value);
   bool WriteUInt64(uint64_t value);
+
+  // Writes least significant |num_bytes| of a 64-bit unsigned integer in the
+  // correct byte order.
+  bool WriteBytesToUInt64(size_t num_bytes, uint64_t value);
+
   // Write unsigned floating point corresponding to the value. Large values are
   // clamped to the maximum representable (kUFloat16MaxValue). Values that can
   // not be represented directly are rounded down.
   bool WriteUFloat16(uint64_t value);
   bool WriteStringPiece16(QuicStringPiece val);
   bool WriteBytes(const void* data, size_t data_len);
   bool WriteRepeatedByte(uint8_t byte, size_t count);
   // Fills the remaining buffer with null characters.
   void WritePadding();
   // Write padding of |count| bytes.
@@ skipping 21 matching lines @@
 
   char* buffer_;
   size_t capacity_;  // Allocation size of payload (or -1 if buffer is const).
   size_t length_;    // Current length of the buffer.
 
   // Perspective of this data writer. Please note, although client and server
   // may have different in-memory representation of the same field, the on wire
   // representation must be consistent.
   Perspective perspective_;
 
+  // The endianness to write integers and floating numbers.
+  Endianness endianness_;
+
   DISALLOW_COPY_AND_ASSIGN(QuicDataWriter);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_QUIC_DATA_WRITER_H_