aslp-cpp: also return encoding name

aslp-cpp/include/aslp-cpp/aslp-cpp.hpp

@@ -7,14 +7,17 @@ namespace httplib {
 class Client;
 } // namespace httplib;
 
+// tuple of encoding and semantics
+using aslp_opcode_result_t = std::tuple<std::string, std::string>;
+
 class aslp_connection
 {
   std::unique_ptr<httplib::Client> client {nullptr};
 
 public:
   aslp_connection(const std::string& server_addr, int server_port);
   aslp_connection(aslp_connection&&) noexcept;
-  auto get_opcode(uint32_t opcode) -> std::string;
+  auto get_opcode(uint32_t opcode) -> aslp_opcode_result_t;
   void wait_active();
   ~aslp_connection();
 };
@@ -54,7 +57,7 @@ class aslp_client {
   auto static start(const std::string& addr, int server_port) -> std::unique_ptr<aslp_client>;
 
   /** Returns the semantics for the given opcode, as a newline-separated string. */
-  auto get_opcode(uint32_t opcode) -> std::string;
+  auto get_opcode(uint32_t opcode) -> aslp_opcode_result_t;
 
   /** Destroys the aslp_client and terminates the managed server as well. */
   virtual ~aslp_client() {

aslp-cpp/source/aslp-cpp.cpp

@@ -147,7 +147,7 @@ void aslp_connection::wait_active()
   std::cout << "\n";
 }
 
-std::string aslp_connection::get_opcode(uint32_t opcode)
+aslp_opcode_result_t aslp_connection::get_opcode(uint32_t opcode)
 {
   auto codestr = std::format("{:#x}", opcode);
   std::cout << codestr << "\n";
@@ -167,7 +167,10 @@ std::string aslp_connection::get_opcode(uint32_t opcode)
   if (!result.contains("semantics")) {
     throw std::runtime_error("semantics missing");
   }
-  return result["semantics"];
+  if (!result.contains("encoding")) {
+    throw std::runtime_error("encoding name missing");
+  }
+  return {result["encoding"], result["semantics"]};
 }
 
 aslp_connection::aslp_connection(const std::string& server_addr,
@@ -179,7 +182,7 @@ aslp_connection::aslp_connection(const std::string& server_addr,
 aslp_connection::aslp_connection(aslp_connection&&) noexcept = default;
 aslp_connection::~aslp_connection() = default;
 
-std::string aslp_client::get_opcode(uint32_t opcode)
+aslp_opcode_result_t aslp_client::get_opcode(uint32_t opcode)
 {
   aslp_connection conn {server_addr, server_port};
   conn.wait_active();

aslp-cpp/test/source/aslp-cpp_test.cpp

@@ -8,7 +8,8 @@ auto main() -> int
   auto s = aslp_client::start();
 
   try {
-    auto c = s->get_opcode(0xFD430091);
+    std::string c;
+    std::tie(std::ignore, c) = s->get_opcode(0xFD430091);
     std::cout << c << "\n";
   } catch (std::runtime_error &e) {
     std::cout << " error " << e.what() << "\n";