global.set has been implemented, but not diff xmit for globals

luprex/cpp/drv/driver-common.cpp

@@ -9,8 +9,10 @@ static void if_error_print_and_exit(const std::string_view str) {
     }
 }
 
-static void dprintf_callback(const char *oneline) {
-    fprintf(stderr, "DPRINTF: %s\n", oneline);
+static void dprint_callback(const char *oneline, size_t size) {
+    fwrite("DPRINT:", 1, 7, stderr);
+    fwrite(oneline, 1, size, stderr);
+    fwrite("\n", 1, 1, stderr);
     fflush(stderr);
 }
 
@@ -546,7 +548,7 @@ class Driver {
         // Load the DLL and gain access to its functions.
         call_init_engine_wrapper(&engw);
         engw.replay_cb_sent_outgoing = replay_cb_sent_outgoing;
-        engw.hook_dprintf(dprintf_callback);
+        engw.hook_dprint(dprint_callback);
 
         // If argv contains "replay <filename>", do a replay,
         // and then skip everything else.