2 * Copyright © 2016 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
17 struct ao_lisp_funcs {
18 void (*print)(ao_poly);
19 void (*patom)(ao_poly);
22 static const struct ao_lisp_funcs ao_lisp_funcs[AO_LISP_NUM_TYPE] = {
24 .print = ao_lisp_cons_print,
25 .patom = ao_lisp_cons_patom,
28 .print = ao_lisp_string_print,
29 .patom = ao_lisp_string_patom,
32 .print = ao_lisp_int_print,
33 .patom = ao_lisp_int_print,
36 .print = ao_lisp_atom_print,
37 .patom = ao_lisp_atom_print,
40 .print = ao_lisp_builtin_print,
41 .patom = ao_lisp_builtin_print,
44 .print = ao_lisp_frame_print,
45 .patom = ao_lisp_frame_print,
48 .print = ao_lisp_lambda_print,
49 .patom = ao_lisp_lambda_print,
52 .print = ao_lisp_stack_print,
53 .patom = ao_lisp_stack_print,
57 static const struct ao_lisp_funcs *
60 uint8_t type = ao_lisp_poly_type(p);
62 if (type < AO_LISP_NUM_TYPE)
63 return &ao_lisp_funcs[type];
68 ao_lisp_poly_print(ao_poly p)
70 const struct ao_lisp_funcs *f = funcs(p);
77 ao_lisp_poly_patom(ao_poly p)
79 const struct ao_lisp_funcs *f = funcs(p);
86 ao_lisp_ref(ao_poly poly) {
87 if (poly == AO_LISP_NIL)
89 if (poly & AO_LISP_CONST)
90 return (void *) (ao_lisp_const + (poly & AO_LISP_REF_MASK) - 4);
91 return (void *) (ao_lisp_pool + (poly & AO_LISP_REF_MASK) - 4);
95 ao_lisp_poly(const void *addr, ao_poly type) {
96 const uint8_t *a = addr;
99 if (AO_LISP_IS_CONST(a))
100 return AO_LISP_CONST | (a - ao_lisp_const + 4) | type;
101 return (a - ao_lisp_pool + 4) | type;