RSP proxy that can record session (for playback testing)....

build_tools/debug_server/debug_server/common/rsp_packetizer.h

Index: build_tools/debug_server/debug_server/common/rsp_packetizer.h
===================================================================
--- build_tools/debug_server/debug_server/common/rsp_packetizer.h	(revision 0)
+++ build_tools/debug_server/debug_server/common/rsp_packetizer.h	(revision 0)
@@ -0,0 +1,48 @@
+#ifndef NACL_SDK_BUILD_TOOLS_DEBUG_SERVER_COMMON_RSP_TOKENIZER_H_
+#define NACL_SDK_BUILD_TOOLS_DEBUG_SERVER_COMMON_RSP_TOKENIZER_H_
+
+#include <deque>
+#include <string>
+#include "debug_blob.h"
+#include "rsp_packet_utils.h"
+
+namespace rsp {
+class PacketConsumer {
+ public:
+  PacketConsumer() {}
+  virtual ~PacketConsumer() {}
+  virtual void OnPacket(debug::Blob& body, bool valid_checksum) = 0;
+  virtual void OnUnexpectedChar(char unexpected_char) = 0;
+  virtual void OnBreak() = 0;
+};
+
+class Packetizer {
+public:
+  Packetizer();
+  virtual ~Packetizer();
+
+  virtual void SetPacketConsumer(PacketConsumer* consumer);
+  virtual void OnData(const void* data, size_t data_length=-1);
+  virtual void OnData(const debug::Blob& data);
+  virtual void Reset();
+  virtual bool IsIdle() const;
+
+protected:
+  enum State {IDLE, BODY, END, CHECKSUM, ESCAPE, RUNLEN};
+
+  virtual void OnChar(unsigned char c);
+  bool HexCharToint(unsigned char c, unsigned int* result);
+  virtual void AddToChecksum(unsigned char c);
+  virtual void AddCharToBody(unsigned char c);
+  virtual void AddRepeatedChars(size_t n);
+
+  State state_;
+  PacketConsumer* consumer_;
+  debug::Blob body_;
+  unsigned int calculated_checksum_;
+  unsigned int recv_checksum_;
+};
+
+}  // namespace rsp
+
+#endif  // NACL_SDK_BUILD_TOOLS_DEBUG_SERVER_COMMON_RSP_TOKENIZER_H_