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/*
* Copyright © 2016 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include "ao_lisp.h"
#if 0
#define DBG(...) printf (__VA_ARGS__)
#else
#define DBG(...)
#endif
struct ao_lisp_funcs {
void (*print)(ao_poly);
void (*patom)(ao_poly);
};
static const struct ao_lisp_funcs ao_lisp_funcs[AO_LISP_NUM_TYPE] = {
[AO_LISP_CONS] = {
.print = ao_lisp_cons_print,
.patom = ao_lisp_cons_patom,
},
[AO_LISP_STRING] = {
.print = ao_lisp_string_print,
.patom = ao_lisp_string_patom,
},
[AO_LISP_INT] = {
.print = ao_lisp_int_print,
.patom = ao_lisp_int_print,
},
[AO_LISP_ATOM] = {
.print = ao_lisp_atom_print,
.patom = ao_lisp_atom_print,
},
[AO_LISP_BUILTIN] = {
.print = ao_lisp_builtin_print,
.patom = ao_lisp_builtin_print,
}
};
static const struct ao_lisp_funcs *
funcs(ao_poly p)
{
uint8_t type = ao_lisp_poly_type(p);
if (type < AO_LISP_NUM_TYPE)
return &ao_lisp_funcs[type];
return NULL;
}
void
ao_lisp_poly_print(ao_poly p)
{
const struct ao_lisp_funcs *f = funcs(p);
if (f && f->print)
f->print(p);
}
void
ao_lisp_poly_patom(ao_poly p)
{
const struct ao_lisp_funcs *f = funcs(p);
if (f && f->patom)
f->patom(p);
}
static const struct ao_lisp_type const *ao_lisp_types[AO_LISP_NUM_TYPE] = {
[AO_LISP_CONS] = &ao_lisp_cons_type,
[AO_LISP_INT] = NULL,
[AO_LISP_STRING] = &ao_lisp_string_type,
[AO_LISP_OTHER] = (void *) 0x1,
[AO_LISP_ATOM] = &ao_lisp_atom_type,
[AO_LISP_BUILTIN] = &ao_lisp_builtin_type,
[AO_LISP_FRAME] = &ao_lisp_frame_type,
};
int
ao_lisp_poly_mark(ao_poly p)
{
const struct ao_lisp_type *lisp_type = ao_lisp_types[ao_lisp_poly_type(p)];
if (lisp_type)
return ao_lisp_mark(lisp_type, ao_lisp_ref(p));
return 1;
}
int
ao_lisp_poly_move(ao_poly *ref)
{
uint8_t type;
ao_poly p = *ref;
const struct ao_lisp_type *lisp_type;
int ret;
void *addr;
if (!p)
return 1;
type = p & AO_LISP_TYPE_MASK;
if (type == AO_LISP_OTHER)
type = ao_lisp_other_type(ao_lisp_move_map(ao_lisp_poly_other(p)));
if (type >= AO_LISP_NUM_TYPE)
abort();
lisp_type = ao_lisp_types[type];
if (!lisp_type)
return 1;
addr = ao_lisp_ref(p);
ret = ao_lisp_move(lisp_type, &addr);
if (addr != ao_lisp_ref(p)) {
ao_poly np = ao_lisp_poly(addr, p & AO_LISP_TYPE_MASK);
DBG("poly %d moved %04x -> %04x\n",
type, p, np);
*ref = np;
}
return ret;
}
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