altos/lisp: Eliminate compiler warning about array bounds at -O3

[fw/altos] / src / lisp / ao_lisp_poly.c

diff --git a/src/lisp/ao_lisp_poly.c b/src/lisp/ao_lisp_poly.c
index bfd75ae3b629a1ad9e235277418f3d528e73d6a1..236176e76baffc91fc0bfeeedc9c78511b6d465d 100644 (file)
--- a/src/lisp/ao_lisp_poly.c
+++ b/src/lisp/ao_lisp_poly.c
@@ -84,3 +84,21 @@ ao_lisp_poly_patom(ao_poly p)
                f->patom(p);
 }
 
+void *
+ao_lisp_ref(ao_poly poly) {
+       if (poly == AO_LISP_NIL)
+               return NULL;
+       if (poly & AO_LISP_CONST)
+               return (void *) (ao_lisp_const + (poly & AO_LISP_REF_MASK) - 4);
+       return (void *) (ao_lisp_pool + (poly & AO_LISP_REF_MASK) - 4);
+}
+
+ao_poly
+ao_lisp_poly(const void *addr, ao_poly type) {
+       const uint8_t   *a = addr;
+       if (a == NULL)
+               return AO_LISP_NIL;
+       if (AO_LISP_IS_CONST(a))
+               return AO_LISP_CONST | (a - ao_lisp_const + 4) | type;
+       return (a - ao_lisp_pool + 4) | type;
+}