some update.

include/LSP/MessageBuffer.h

@@ -0,0 +1,37 @@
+#include <vector>
+#include <string_view>
+
+namespace clice {
+
+class MessageBuffer {
+    std::vector<char> buffer;
+    std::size_t max = 0;
+
+public:
+    void write(std::string_view message) { buffer.insert(buffer.end(), message.begin(), message.end()); }
+
+    std::string_view read() {
+        std::string_view view = std::string_view(buffer.data(), buffer.size());
+        auto start = view.find("Content-Length: ") + 16;
+        auto end = view.find("\r\n\r\n");
+
+        if(start != std::string_view::npos || end != std::string_view::npos) {
+            std::size_t length = std::stoul(std::string(view.substr(start, end - start)));
+            if(view.size() >= length + end + 4) {
+                this->max = length + end + 4;
+                return view.substr(end + 4, length);
+            }
+        }
+
+        return {};
+    }
+
+    void clear() {
+        if(max != 0) {
+            buffer.erase(buffer.begin(), buffer.begin() + max);
+            max = 0;
+        }
+    }
+};
+
+}  // namespace clice

include/LSP/Protocol.h

@@ -481,7 +481,7 @@ struct ServerCapabilities {
     /// If omitted it defaults to 'utf-16'.
     ///
     /// possible values: ['utf-8', 'utf-16', 'utf-32'] in PositionEncodingKind
-    std::string_view positionEncoding = PositionEncodingKind::UTF8;
+    std::string_view positionEncoding = PositionEncodingKind::UTF16;
 
     /// Defines how text documents are synced. Is either a detailed structure
     /// defining each notification or for backwards compatibility the

include/LSP/Server.h

@@ -10,6 +10,7 @@ extern class Server server;
 class Server {
     uv_loop_t* loop;
     uv_pipe_t stdin_pipe;
+    uv_pipe_t stdout_pipe;
 
 public:
     int start();