X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Flisp%2Fao_lisp_atom.c;h=5c6d5a67dc72bac26d4abb1afd14a955e7165136;hb=417161dbb36323b5a6572859dedad02ca92fc65c;hp=65282142cdb4ca64e85a8fad5c22642b575c358b;hpb=56d46ceaa1413415f25e47e81036426132f99924;p=fw%2Faltos

diff --git a/src/lisp/ao_lisp_atom.c b/src/lisp/ao_lisp_atom.c
index 65282142..5c6d5a67 100644
--- a/src/lisp/ao_lisp_atom.c
+++ b/src/lisp/ao_lisp_atom.c
@@ -34,12 +34,8 @@ static void atom_mark(void *addr)
 {
 	struct ao_lisp_atom	*atom = addr;
 
-	if (atom->next == AO_LISP_ATOM_CONST)
-		return;
-
 	for (;;) {
-		ao_lisp_poly_mark(atom->val);
-		atom = atom->next;
+		atom = ao_lisp_poly_atom(atom->next);
 		if (!atom)
 			break;
 		if (ao_lisp_mark_memory(atom, atom_size(atom)))
@@ -51,57 +47,113 @@ static void atom_move(void *addr)
 {
 	struct ao_lisp_atom	*atom = addr;
 
-	if (atom->next == AO_LISP_ATOM_CONST)
-		return;
-
 	for (;;) {
-		struct ao_lisp_atom	*next;
-
-		atom->val = ao_lisp_poly_move(atom->val);
-		next = ao_lisp_move_memory(atom->next, atom_size(atom->next));
-		if (!next)
+		if (ao_lisp_poly_move(&atom->next, 0))
 			break;
-		atom->next = next;
-		atom = next;
+		atom = ao_lisp_poly_atom(atom->next);
 	}
 }
 
-const struct ao_lisp_mem_type ao_lisp_atom_type = {
+const struct ao_lisp_type ao_lisp_atom_type = {
 	.mark = atom_mark,
 	.size = atom_size,
 	.move = atom_move,
 };
 
-struct ao_lisp_atom	*atoms;
+struct ao_lisp_atom	*ao_lisp_atoms;
 
 struct ao_lisp_atom *
 ao_lisp_atom_intern(char *name)
 {
 	struct ao_lisp_atom	*atom;
-	int			b;
 
-	for (atom = atoms; atom; atom = atom->next) {
+	for (atom = ao_lisp_atoms; atom; atom = ao_lisp_poly_atom(atom->next)) {
+		if (!strcmp(atom->name, name))
+			return atom;
+	}
+#ifdef ao_builtin_atoms
+	for (atom = ao_lisp_poly_atom(ao_builtin_atoms); atom; atom = ao_lisp_poly_atom(atom->next)) {
 		if (!strcmp(atom->name, name))
 			return atom;
 	}
-	for (b = 0; ao_lisp_builtins[b]; b++)
-		if (!strcmp(ao_lisp_builtins[b]->name, name))
-			return (struct ao_lisp_atom *) ao_lisp_builtins[b];
-	if (!atoms)
-		ao_lisp_root_add(&ao_lisp_atom_type, (void **) &atoms);
+#endif
 	atom = ao_lisp_alloc(name_size(name));
 	if (atom) {
 		atom->type = AO_LISP_ATOM;
-		atom->next = atoms;
-		atoms = atom;
+		atom->next = ao_lisp_atom_poly(ao_lisp_atoms);
+		if (!ao_lisp_atoms)
+			ao_lisp_root_add(&ao_lisp_atom_type, &ao_lisp_atoms);
+		ao_lisp_atoms = atom;
 		strcpy(atom->name, name);
-		atom->val = AO_LISP_NIL;
 	}
 	return atom;
 }
 
+struct ao_lisp_frame	*ao_lisp_frame_global;
+struct ao_lisp_frame	*ao_lisp_frame_current;
+
+static void
+ao_lisp_atom_init(void)
+{
+	if (!ao_lisp_frame_global) {
+		ao_lisp_frame_global = ao_lisp_frame_new(0);
+		ao_lisp_root_add(&ao_lisp_frame_type, &ao_lisp_frame_global);
+		ao_lisp_root_add(&ao_lisp_frame_type, &ao_lisp_frame_current);
+	}
+}
+
+static ao_poly *
+ao_lisp_atom_ref(struct ao_lisp_frame *frame, ao_poly atom)
+{
+	ao_poly	*ref;
+	ao_lisp_atom_init();
+	while (frame) {
+		ref = ao_lisp_frame_ref(frame, atom);
+		if (ref)
+			return ref;
+		frame = ao_lisp_poly_frame(frame->next);
+	}
+	if (ao_lisp_frame_global) {
+		ref = ao_lisp_frame_ref(ao_lisp_frame_global, atom);
+		if (ref)
+			return ref;
+	}
+	return NULL;
+}
+
+ao_poly
+ao_lisp_atom_get(ao_poly atom)
+{
+	ao_poly *ref = ao_lisp_atom_ref(ao_lisp_frame_current, atom);
+
+	if (!ref && ao_lisp_frame_global)
+		ref = ao_lisp_frame_ref(ao_lisp_frame_global, atom);
+#ifdef ao_builtin_frame
+	if (!ref)
+		ref = ao_lisp_frame_ref(ao_lisp_poly_frame(ao_builtin_frame), atom);
+#endif
+	if (ref)
+		return *ref;
+	return ao_lisp_error(AO_LISP_UNDEFINED, "undefined atom %s", ao_lisp_poly_atom(atom)->name);
+}
+
+ao_poly
+ao_lisp_atom_set(ao_poly atom, ao_poly val)
+{
+	ao_poly *ref = ao_lisp_atom_ref(ao_lisp_frame_current, atom);
+
+	if (!ref && ao_lisp_frame_global)
+		ref = ao_lisp_frame_ref(ao_lisp_frame_global, atom);
+	if (ref)
+		*ref = val;
+	else
+		ao_lisp_frame_global = ao_lisp_frame_add(ao_lisp_frame_global, atom, val);
+	return val;
+}
+
 void
-ao_lisp_atom_print(struct ao_lisp_atom *a)
+ao_lisp_atom_print(ao_poly a)
 {
-	fputs(a->name, stdout);
+	struct ao_lisp_atom *atom = ao_lisp_poly_atom(a);
+	printf("%s", atom->name);
 }