Handle run-length-encoding.
The change was taken from a patch by Virgile Bello.
llvm-svn: 189470
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
index 46bd9ca..e54fec5 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
@@ -465,8 +465,31 @@
m_history.AddPacket (m_bytes.c_str(), total_length, History::ePacketTypeRecv, total_length);
- packet_str.assign (m_bytes, content_start, content_length);
-
+ // Copy the packet from m_bytes to packet_str expanding the
+ // run-length encoding in the process.
+ // Reserve enough byte for the most common case (no RLE used)
+ packet_str.reserve(m_bytes.length());
+ for (std::string::const_iterator c = m_bytes.begin() + content_start; c != m_bytes.begin() + content_start + content_length; ++c)
+ {
+ if (*c == '*')
+ {
+ // '*' indicates RLE. Next character will give us the
+ // repeat count and previous character is what is to be
+ // repeated.
+ char char_to_repeat = packet_str.back();
+ // Number of time the previous character is repeated
+ int repeat_count = *++c + 3 - ' ';
+ // We have the char_to_repeat and repeat_count. Now push
+ // it in the packet.
+ for (int i = 0; i < repeat_count; ++i)
+ packet_str.push_back(char_to_repeat);
+ }
+ else
+ {
+ packet_str.push_back(*c);
+ }
+ }
+
if (m_bytes[0] == '$')
{
assert (checksum_idx < m_bytes.size());