gboolean
plgi_term_to_gbytes(term_t t,
GBytes **bytes)
{
GBytes *bytes0;
term_t list = PL_copy_term_ref(t);
term_t head = PL_new_term_ref();
guint8 *data;
gsize len;
gint i = 0;
if ( PL_skip_list(list, 0, &len) != PL_LIST )
{ return PL_type_error("list", t);
}
data = g_malloc0(len);
while ( PL_get_list(list, head, list) )
{ guint8 byte;
if ( !plgi_term_to_guint8(head, &byte) )
{ g_free(data);
return FALSE;
}
data[i++] = byte;
}
bytes0 = g_bytes_new_take(data, len);
PLGI_debug(" term: 0x%lx ---> GBytes: %p", t, bytes0);
*bytes = bytes0;
return TRUE;
}
/** assign a tuple to something:
*/
static foreign_t python_assign_tuple(term_t t_lhs, term_t t_rhs) {
PyObject *e;
Py_ssize_t sz;
functor_t f;
e = term_to_python(t_rhs, true);
if (!e || !PyTuple_Check(e)) {
return -1;
}
sz = PyTuple_Size(e);
switch (PL_term_type(t_lhs)) {
case PL_VARIABLE:
return PL_unify(t_lhs, t_rhs);
case PL_ATOM:
return assign_python(py_Main, t_rhs, e);
case PL_TERM:
if (PL_get_functor(t_lhs, &f)) {
term_t targ = PL_new_term_ref();
// assign a tuple to a tuple
if (PL_functor_name(f) == ATOM_t && ((sz = PL_functor_arity(f)))) {
Py_ssize_t i;
for (i = 0; i < sz; i++) {
PL_get_arg(i + 1, t_lhs, targ);
assign_python(py_Main, targ, PyTuple_GetItem(e, i));
}
} else if (PL_functor_name(f) == ATOM_comma) {
int n = conj_size(t_lhs);
if (n != sz)
return -1;
return conj_copy(t_lhs, e, 0);
} else if (PL_functor_name(f) == ATOM_dot) { // vectors
size_t len;
term_t tail = PL_new_term_ref();
PL_skip_list(t_lhs, tail, &len);
if (!PL_get_nil(tail))
return -1;
term_t arg = tail;
size_t i;
for (i = 0; i < len; i++) {
if (!PL_get_list(t_rhs, arg, t_rhs)) {
return -1;
}
if (assign_python(py_Main, arg, PyTuple_GetItem(e, i)) < 0)
return -1;
}
}
}
}
return -1;
}
static foreign_t pl_clingo_ground(term_t ccontrol, term_t parts) {
clingo_env *ctl;
clingo_part_t *part_vec = NULL;
size_t plen = 0;
int rc;
if (!(rc = get_clingo(ccontrol, &ctl))) {
goto out;
}
switch (PL_skip_list(parts, 0, &plen)) {
case PL_LIST: {
term_t tail = PL_copy_term_ref(parts);
term_t head = PL_new_term_ref();
if (!(part_vec = malloc(sizeof(*part_vec) * plen))) {
rc = PL_resource_error("memory");
goto out;
}
memset(part_vec, 0, sizeof(*part_vec) * plen);
for (size_t i = 0; PL_get_list(tail, head, tail); i++) {
if (!(rc = get_params(head, &part_vec[i]))) {
goto out;
}
}
break;
}
default: {
rc = PL_type_error("list", parts);
goto out;
}
}
if (!(rc = clingo_status(clingo_control_ground(ctl->control, part_vec, plen,
call_function, ctl)))) {
goto out;
}
out:
if (part_vec) {
for (size_t i = 0; i < plen; i++) {
if (part_vec[i].params) {
free((void *)part_vec[i].params);
}
}
free(part_vec);
}
return rc;
}
static foreign_t pl_clingo_solve(term_t ccontrol, term_t assumptions,
term_t Show, term_t Model, control_t h) {
int rc = TRUE;
solve_state *state = NULL;
clingo_symbolic_literal_t *assump_vec = NULL;
int control = PL_foreign_control(h);
if (control == PL_FIRST_CALL) {
size_t alen = 0;
if (!(state = malloc(sizeof(*state)))) {
rc = PL_resource_error("memory");
goto out;
}
memset(state, 0, sizeof(*state));
if (!(rc = get_clingo(ccontrol, &state->ctl))) {
goto out;
}
if (PL_skip_list(assumptions, 0, &alen) != PL_LIST) {
rc = PL_type_error("list", assumptions);
goto out;
}
term_t tail = PL_copy_term_ref(assumptions);
term_t head = PL_new_term_ref();
if (!(assump_vec = malloc(sizeof(*assump_vec) * alen))) {
rc = PL_resource_error("memory");
goto out;
}
memset(assump_vec, 0, sizeof(*assump_vec) * alen);
for (size_t i = 0; PL_get_list(tail, head, tail); i++) {
if (!(rc = clingo_status(get_assumption(head, &assump_vec[i])))) {
goto out;
}
}
if (!(rc = clingo_status(clingo_control_solve_iteratively(
state->ctl->control, assump_vec, alen, &state->it)))) {
goto out;
}
} else {
state = PL_foreign_context_address(h);
}
while (control != PL_PRUNED) {
clingo_model_t *model;
if (!(rc = clingo_status(
clingo_solve_iteratively_next(state->it, &model)))) {
goto out;
}
if (model) {
int show;
if (!(rc = get_show_map(Show, &show))) {
goto out;
}
if (!(rc = unify_model(Model, show, model))) {
if (PL_exception(0)) {
goto out;
}
} else {
PL_retry_address(state);
state = NULL;
break;
}
} else {
rc = FALSE;
break;
}
}
out:
if (assump_vec) {
free(assump_vec);
}
if (state) {
if (state->it) {
clingo_solve_iteratively_close(state->it);
}
free(state);
}
return rc;
}
