move features procedure defun to state.c benz

contrib/05.r7rs/scheme/base.scm

@@ -518,4 +518,6 @@
           write-string
           write-u8
           write-bytevector
-          flush-output-port))
+          flush-output-port)
+
+  (export features))

extlib/benz/state.c

@@ -91,6 +91,14 @@ pic_init_features(pic_state *pic)
 #endif
 }
 
+static pic_value
+pic_features(pic_state *pic)
+{
+  pic_get_args(pic, "");
+
+  return pic->features;
+}
+
 #define DONE pic_gc_arena_restore(pic, ai);
 
 static void
@@ -111,6 +119,8 @@ pic_init_core(pic_state *pic)
     pic_define_syntactic_keyword(pic, pic->lib->env, pic->sBEGIN, pic->uBEGIN);
     pic_define_syntactic_keyword(pic, pic->lib->env, pic->sDEFINE_MACRO, pic->uDEFINE_MACRO);
 
+    pic_defun(pic, "features", pic_features);
+
     pic_init_undef(pic); DONE;
     pic_init_bool(pic); DONE;
     pic_init_pair(pic); DONE;

piclib/picrin/base.scm

@@ -286,4 +286,6 @@
           write-shared
           display)
 
-  (export eval))
+  (export eval)
+
+  (export features))

src/main.c

@@ -7,14 +7,6 @@
 void pic_init_contrib(pic_state *);
 void pic_load_piclib(pic_state *);
 
-static pic_value
-pic_features(pic_state *pic)
-{
-  pic_get_args(pic, "");
-
-  return pic->features;
-}
-
 static pic_value
 pic_libraries(pic_state *pic)
 {
@@ -38,10 +30,6 @@ pic_init_picrin(pic_state *pic)
     pic_defun(pic, "libraries", pic_libraries);
   }
 
-  pic_deflibrary (pic, "(scheme base)") {
-    pic_defun(pic, "features", pic_features);
-  }
-
   pic_init_contrib(pic);
   pic_load_piclib(pic);
 }