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#include <lcq/pit/runtime/value/cell.h>
bool pit_value_is_cell(pit_runtime *rt, pit_value a) {
return pit_value_is_ref_heavy_sort(rt, a, PIT_VALUE_HEAVY_SORT_CELL);
}
pit_value pit_value_cell_new(pit_runtime *rt, pit_value v) {
pit_value ret = pit_value_ref_heavy_new(rt);
pit_value_heavy *h = pit_value_ref_deref(rt, pit_value_as_ref(rt, ret));
if (!h) { pit_error(rt, "failed to create new heavy value for cell"); return PIT_NIL; }
h->hsort = PIT_VALUE_HEAVY_SORT_CELL;
h->in.cell = v;
return ret;
}
pit_value pit_value_cell_get(pit_runtime *rt, pit_value cell, pit_value sym) {
if (pit_value_sort(cell) != PIT_VALUE_SORT_REF) {
char buf[256];
i64 end = pit_dump(rt, buf, sizeof(buf) - 1, sym, false);
buf[end] = 0;
pit_error(rt, "attempted to get unbound variable/function: %s", buf);
return PIT_NIL;
}
pit_value_heavy *h = pit_value_ref_deref(rt, pit_value_as_ref(rt, cell));
if (!h) { pit_error(rt, "bad ref"); return PIT_NIL; }
if (h->hsort != PIT_VALUE_HEAVY_SORT_CELL) {
pit_error(rt, "cell value ref does not point to cell");
return PIT_NIL;
}
return h->in.cell;
}
void pit_value_cell_set(pit_runtime *rt, pit_value cell, pit_value v, pit_value sym) {
if (pit_value_sort(cell) != PIT_VALUE_SORT_REF) {
char buf[256];
i64 end = pit_dump(rt, buf, sizeof(buf) - 1, sym, false);
buf[end] = 0;
pit_error(rt, "attempted to set unbound variable/function: %s", buf);
return;
}
pit_ref idx = pit_value_as_ref(rt, cell);
if (idx < rt->frozen_values) { pit_error(rt, "attempt to modify frozen cell"); return; }
pit_value_heavy *h = pit_value_ref_deref(rt, idx);
if (!h) { pit_error(rt, "bad ref"); return; }
if (h->hsort != PIT_VALUE_HEAVY_SORT_CELL) {
pit_error(rt, "cell value ref does not point to cell");
return;
}
h->in.cell = v;
}
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