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; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
20 static int name_size(char *name)
22 return sizeof(struct ao_lisp_atom) + strlen(name) + 1;
25 static int atom_size(void *addr)
27 struct ao_lisp_atom *atom = addr;
30 return name_size(atom->name);
33 static void atom_mark(void *addr)
35 struct ao_lisp_atom *atom = addr;
38 ao_lisp_poly_mark(atom->val);
39 atom = ao_lisp_poly_atom(atom->next);
42 if (ao_lisp_mark_memory(atom, atom_size(atom)))
47 static void atom_move(void *addr)
49 struct ao_lisp_atom *atom = addr;
52 struct ao_lisp_atom *next;
54 atom->val = ao_lisp_poly_move(atom->val);
55 next = ao_lisp_poly_atom(atom->next);
56 next = ao_lisp_move_memory(next, atom_size(next));
59 atom->next = ao_lisp_atom_poly(next);
64 const struct ao_lisp_type ao_lisp_atom_type = {
70 struct ao_lisp_atom *ao_lisp_atoms;
73 ao_lisp_atom_intern(char *name)
75 struct ao_lisp_atom *atom;
78 for (atom = ao_lisp_atoms; atom; atom = ao_lisp_poly_atom(atom->next)) {
79 if (!strcmp(atom->name, name))
82 #ifdef ao_builtin_atoms
83 for (atom = ao_lisp_poly_atom(ao_builtin_atoms); atom; atom = ao_lisp_poly_atom(atom->next)) {
84 if (!strcmp(atom->name, name))
89 ao_lisp_root_add(&ao_lisp_atom_type, (void **) &ao_lisp_atoms);
90 atom = ao_lisp_alloc(name_size(name));
92 atom->type = AO_LISP_ATOM;
93 atom->next = ao_lisp_atom_poly(ao_lisp_atoms);
95 strcpy(atom->name, name);
96 atom->val = AO_LISP_NIL;
102 ao_lisp_atom_print(ao_poly a)
104 struct ao_lisp_atom *atom = ao_lisp_poly_atom(a);
105 printf("%s", atom->name);