First round of dead file removal

experimental/linux_debug_server/debugger/rsp/rsp_packet_utils.cc

-// Copyright (c) 2011 The Native Client Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "debugger/rsp/rsp_packet_utils.h"
-#include "debugger/rsp/rsp_packetizer.h"
-
-namespace {
-/// Replaces characters '}', '#', '$', '*' and characters > 126 with escape
-/// sequences: '}' + c ^ 0x20, per RSP protocol spec.
-/// @param[in] blob_in blob to be escaped
-/// @param[out] blob_out destination for transformed blob
-void Escape(const debug::Blob& blob_in, debug::Blob* blob_out) {
-  blob_out->Clear();
-  unsigned char prev_c = 0;
-  for (size_t i = 0; i < blob_in.size(); i++) {
-    unsigned char c = blob_in[i];
-    if (((('$' == c) || ('#' == c) || ('*' == c) || ('}' == c) || (3 == c)) &&
-        (prev_c != '*')) || (c > 126)) {
-      // escape it by '}'
-      blob_out->PushBack('}');
-      c = c ^ 0x20;
-    }
-    blob_out->PushBack(c);
-    prev_c = blob_in[i];
-  }
-}
-
-class LocalPacketConsumer : public rsp::PacketConsumerInterface {
- public:
-  explicit LocalPacketConsumer(debug::Blob* packet)
-      : packet_(packet),
-        success_(false) {
-  }
-  virtual void OnPacket(const debug::Blob& body, bool valid_checksum) {
-    *packet_ = body;
-    success_ = valid_checksum;
-  }
-  virtual void OnUnexpectedByte(uint8_t unexpected_byte) {}
-  virtual void OnBreak() {}
-
-  debug::Blob* packet_;
-  bool success_;
-};
-}  // namespace
-
-namespace rsp {
-void PacketUtils::AddEnvelope(const debug::Blob& blob_in,
-                              debug::Blob* blob_out) {
-  blob_out->Clear();
-  Escape(blob_in, blob_out);
-  unsigned int checksum = 0;
-  for (size_t i = 0; i < blob_out->size(); i++) {
-    checksum += (*blob_out)[i];
-    checksum %= 256;
-  }
-
-  blob_out->PushFront('$');
-  blob_out->PushBack('#');
-  blob_out->PushBack(debug::Blob::GetHexDigit(checksum, 1));
-  blob_out->PushBack(debug::Blob::GetHexDigit(checksum, 0));
-}
-
-bool PacketUtils::RemoveEnvelope(const debug::Blob& blob_in,
-                                 debug::Blob* blob_out) {
-  blob_out->Clear();
-
-  // RSP packet consumer, copies received RSP message to |blob_out|.
-  LocalPacketConsumer consumer(blob_out);
-
-  // Associate |consumer| with packetizer.
-  // Packetizer will call consumer->OnPacket when it receives complete
-  // RSP packet.
-  Packetizer pktz;
-  pktz.SetPacketConsumer(&consumer);
-
-  // Packetizer removes envelope and calls LocalPacketConsumer::OnPacket,
-  // OnPacket copies unpacked message to |blob_out|.
-  pktz.OnData(blob_in);
-
-  // LocalPacketConsumer::OnPacket sets |consumer.success_| to true
-  // if message was successfully unpacked (and checksum is correct).
-  return consumer.success_;
-}
-}  // namespace rsp
-