Extract connection handling

src/gdb-stub/connection_handler.cpp

@@ -0,0 +1,59 @@
+#include "connection_handler.hpp"
+#include "checksum.hpp"
+
+#include <thread>
+
+using namespace std::literals;
+
+namespace gdb_stub
+{
+    namespace
+    {
+        bool read_from_socket(stream_processor& processor, network::tcp_client_socket& client)
+        {
+            const auto data = client.receive();
+            if (!data)
+            {
+                return false;
+            }
+
+            processor.push_stream_data(*data);
+            return true;
+        }
+    }
+
+    connection_handler::connection_handler(network::tcp_client_socket& client)
+        : client_(client)
+    {
+        this->client_.set_blocking(false);
+    }
+
+    std::optional<std::string> connection_handler::get_packet()
+    {
+        while (this->client_.is_valid() && !this->processor_.has_packet())
+        {
+            if (!read_from_socket(this->processor_, this->client_))
+            {
+                std::this_thread::sleep_for(100ms);
+            }
+        }
+
+        if (this->processor_.has_packet())
+        {
+            return this->processor_.get_next_packet();
+        }
+
+        return std::nullopt;
+    }
+
+    void connection_handler::send_packet(const std::string_view data) const
+    {
+        const auto checksum = compute_checksum_as_string(data);
+        this->send_raw_data("$" + std::string(data) + "#" + checksum);
+    }
+
+    void connection_handler::send_raw_data(const std::string_view data) const
+    {
+        (void)this->client_.send(data);
+    }
+}