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 (*write)(ao_poly);
19 void (*display)(ao_poly);
22 static const struct ao_lisp_funcs ao_lisp_funcs[AO_LISP_NUM_TYPE] = {
24 .write = ao_lisp_cons_write,
25 .display = ao_lisp_cons_display,
28 .write = ao_lisp_string_write,
29 .display = ao_lisp_string_display,
32 .write = ao_lisp_int_write,
33 .display = ao_lisp_int_write,
36 .write = ao_lisp_atom_write,
37 .display = ao_lisp_atom_write,
40 .write = ao_lisp_builtin_write,
41 .display = ao_lisp_builtin_write,
44 .write = ao_lisp_frame_write,
45 .display = ao_lisp_frame_write,
48 .write = ao_lisp_lambda_write,
49 .display = ao_lisp_lambda_write,
52 .write = ao_lisp_stack_write,
53 .display = ao_lisp_stack_write,
56 .write = ao_lisp_bool_write,
57 .display = ao_lisp_bool_write,
60 .write = ao_lisp_bigint_write,
61 .display = ao_lisp_bigint_write,
64 .write = ao_lisp_float_write,
65 .display = ao_lisp_float_write,
69 static const struct ao_lisp_funcs *
72 uint8_t type = ao_lisp_poly_type(p);
74 if (type < AO_LISP_NUM_TYPE)
75 return &ao_lisp_funcs[type];
80 ao_lisp_poly_write(ao_poly p)
82 const struct ao_lisp_funcs *f = funcs(p);
89 ao_lisp_poly_display(ao_poly p)
91 const struct ao_lisp_funcs *f = funcs(p);
98 ao_lisp_ref(ao_poly poly) {
99 if (poly == AO_LISP_NIL)
101 if (poly & AO_LISP_CONST)
102 return (void *) (ao_lisp_const + (poly & AO_LISP_REF_MASK) - 4);
103 return (void *) (ao_lisp_pool + (poly & AO_LISP_REF_MASK) - 4);
107 ao_lisp_poly(const void *addr, ao_poly type) {
108 const uint8_t *a = addr;
111 if (AO_LISP_IS_CONST(a))
112 return AO_LISP_CONST | (a - ao_lisp_const + 4) | type;
113 return (a - ao_lisp_pool + 4) | type;