Inverted control flow, engine as library

luprex/core/cpp/driver.cpp

@@ -0,0 +1,32 @@
+
+#include "driver.hpp"
+#include <map>
+#include <iostream>
+#include <cstdio>
+#include <cstring>
+
+
+void driver_drive(DrivenEngine *de) {
+    const int MAXINPUT = 1000;
+    char buf[MAXINPUT];
+    int nbytes; const char *bytes;
+    DrivenEngine::set(de);
+    de->drv_logmode_none();
+    de->drv_set_lua_source(util::read_lua_source("lua"));
+    de->drv_invoke_engine_init();
+    while (!de->drv_get_stop_driver()) {
+        if (de->drv_get_rescan_lua_source()) {
+            de->drv_set_lua_source(util::read_lua_source("lua"));
+        }
+        de->drv_peek_outgoing(0, &nbytes, &bytes);
+        if (nbytes > 0) {
+            fwrite(bytes, 1, nbytes, stdout);
+        }
+        if (fgets(buf, MAXINPUT, stdin)) {
+            de->drv_recv_incoming(0, strlen(buf), buf);
+        }
+        de->drv_invoke_engine_update();
+    }
+    DrivenEngine::set(nullptr);
+}
+