Additional wrappers

Author: andrjohns

src/libquickjs.c

@@ -12,8 +12,11 @@ void Rf_exit(int code) {
 
 #define abort Rf_abort
 #define exit Rf_exit
+#define _exit Rf_exit
 #define fprintf(file, ...) Rprintf(__VA_ARGS__)
-#define printf(...) Rprintf(__VA_ARGS__)
+#define putchar Rprintf
+#define stderr NULL
+#define stdout NULL
 
 #include "quickjs/cutils.c"
 #include "quickjs/libbf.c"