rishi/scryer-prolog
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix additional tests, make better use of existing code (#2293)

Browse Source
This commit is contained in:
Mark
2024-01-13 12:01:20 -07:00
parent dde03718e1
commit f9a5c2d341
1 changed files with 95 additions and 108 deletions
Download Patch File Download Diff File Expand all files Collapse all files

201
src/machine/unify.rs
View File

@@ -173,6 +173,98 @@ pub(crate) trait Unifier: DerefMut<Target = MachineState> {
let mut pstr_iter1 = HeapPStrIter::new(&machine_st.heap, s1); let mut pstr_iter1 = HeapPStrIter::new(&machine_st.heap, s1);
let mut pstr_iter2 = HeapPStrIter::new(&machine_st.heap, s1 + 1); let mut pstr_iter2 = HeapPStrIter::new(&machine_st.heap, s1 + 1);
fn unify_sequence(
machine_st: &mut MachineState,
iter: PStrIteratee,
source_cell: HeapCellValue,
) -> bool {
match iter {
PStrIteratee::Char(focus, _) => {
machine_st.pdl.push(machine_st.heap[focus]);
machine_st.pdl.push(source_cell);
}
PStrIteratee::PStrSegment(focus, _, n) => {
read_heap_cell!(machine_st.heap[focus],
(HeapCellValueTag::CStr | HeapCellValueTag::PStr, pstr_atom) => {
if focus < machine_st.heap.len() - 2 {
machine_st.heap.pop();
machine_st.heap.pop();
}
if n == 0 {
let target_cell = match machine_st.heap[focus].get_tag() {
HeapCellValueTag::CStr => {
atom_as_cstr_cell!(pstr_atom)
}
HeapCellValueTag::PStr => {
pstr_loc_as_cell!(focus)
}
_ => {
unreachable!()
}
};
machine_st.pdl.push(target_cell);
machine_st.pdl.push(source_cell);
} else {
let h_len = machine_st.heap.len();
machine_st.heap.push(pstr_offset_as_cell!(focus));
machine_st.heap.push(fixnum_as_cell!(
Fixnum::build_with(n as i64)
));
machine_st.pdl.push(pstr_loc_as_cell!(h_len));
machine_st.pdl.push(source_cell);
}
return true;
}
(HeapCellValueTag::PStrOffset, pstr_loc) => {
let n0 = cell_as_fixnum!(machine_st.heap[focus+1])
.get_num() as usize;
if pstr_loc < machine_st.heap.len() - 2 {
machine_st.heap.pop();
machine_st.heap.pop();
}
if n == n0 {
machine_st.pdl.push(pstr_loc_as_cell!(focus));
machine_st.pdl.push(source_cell);
} else {
let h_len = machine_st.heap.len();
machine_st.heap.push(pstr_offset_as_cell!(pstr_loc));
machine_st.heap.push(fixnum_as_cell!(
Fixnum::build_with(n as i64)
));
machine_st.pdl.push(pstr_loc_as_cell!(h_len));
machine_st.pdl.push(source_cell);
}
return true;
}
_ => {
}
);
if focus < machine_st.heap.len() - 2 {
machine_st.heap.pop();
machine_st.heap.pop();
}
machine_st.pdl.push(machine_st.heap[focus]);
machine_st.pdl.push(source_cell);
return true;
}
}
false
}
match compare_pstr_prefixes(&mut pstr_iter1, &mut pstr_iter2) { match compare_pstr_prefixes(&mut pstr_iter1, &mut pstr_iter2) {
PStrCmpResult::Ordered(Ordering::Equal) => {} PStrCmpResult::Ordered(Ordering::Equal) => {}
PStrCmpResult::Ordered(Ordering::Less) => { PStrCmpResult::Ordered(Ordering::Less) => {
@@ -230,118 +322,13 @@ pub(crate) trait Unifier: DerefMut<Target = MachineState> {
} }
} }
(HeapCellValueTag::CStr | HeapCellValueTag::PStrLoc) => { (HeapCellValueTag::CStr | HeapCellValueTag::PStrLoc) => {
machine_st.pdl.push(focus); unify_sequence(machine_st, chars_iter.item.unwrap(), focus);
match chars_iter.item.unwrap() {
PStrIteratee::Char(focus, _) |
PStrIteratee::PStrSegment(focus, _, 0) => {
machine_st.pdl.push(machine_st.heap[focus]);
machine_st.heap.pop();
machine_st.heap.pop();
}
PStrIteratee::PStrSegment(focus, _, n) => {
let segment = machine_st.heap[focus];
machine_st.heap.pop();
machine_st.heap.pop();
let h = machine_st.heap.len();
machine_st.pdl.push(pstr_loc_as_cell!(h+1));
machine_st.heap.push(segment);
machine_st.heap.push(pstr_offset_as_cell!(h));
machine_st.heap.push(fixnum_as_cell!(Fixnum::build_with(n as i64)));
}
}
return; return;
} }
(HeapCellValueTag::AttrVar | HeapCellValueTag::Var, h) => { (HeapCellValueTag::AttrVar | HeapCellValueTag::Var, h) => {
match chars_iter.item.unwrap() { if unify_sequence(machine_st, chars_iter.item.unwrap(), heap_loc_as_cell!(h)) {
PStrIteratee::Char(focus, _) => {
machine_st.pdl.push(machine_st.heap[focus]);
machine_st.pdl.push(heap_loc_as_cell!(h));
}
PStrIteratee::PStrSegment(focus, _, n) => {
read_heap_cell!(machine_st.heap[focus],
(HeapCellValueTag::CStr | HeapCellValueTag::PStr, pstr_atom) => {
if focus < machine_st.heap.len() - 2 {
machine_st.heap.pop();
machine_st.heap.pop();
}
if n == 0 {
let target_cell = match machine_st.heap[focus].get_tag() {
HeapCellValueTag::CStr => {
atom_as_cstr_cell!(pstr_atom)
}
HeapCellValueTag::PStr => {
pstr_loc_as_cell!(focus)
}
_ => {
unreachable!()
}
};
machine_st.pdl.push(target_cell);
machine_st.pdl.push(heap_loc_as_cell!(h));
} else {
let h_len = machine_st.heap.len();
machine_st.heap.push(pstr_offset_as_cell!(focus));
machine_st.heap.push(fixnum_as_cell!(
Fixnum::build_with(n as i64)
));
machine_st.pdl.push(pstr_loc_as_cell!(h_len));
machine_st.pdl.push(heap_loc_as_cell!(h));
}
return; return;
} }
(HeapCellValueTag::PStrOffset, pstr_loc) => {
let n0 = cell_as_fixnum!(machine_st.heap[focus+1])
.get_num() as usize;
if pstr_loc < machine_st.heap.len() - 2 {
machine_st.heap.pop();
machine_st.heap.pop();
}
if n == n0 {
machine_st.pdl.push(pstr_loc_as_cell!(focus));
machine_st.pdl.push(heap_loc_as_cell!(h));
} else {
let h_len = machine_st.heap.len();
machine_st.heap.push(pstr_offset_as_cell!(pstr_loc));
machine_st.heap.push(fixnum_as_cell!(
Fixnum::build_with(n as i64)
));
machine_st.pdl.push(pstr_loc_as_cell!(h_len));
machine_st.pdl.push(heap_loc_as_cell!(h));
}
return;
}
_ => {
}
);
if focus < machine_st.heap.len() - 2 {
machine_st.heap.pop();
machine_st.heap.pop();
}
machine_st.pdl.push(machine_st.heap[focus]);
machine_st.pdl.push(heap_loc_as_cell!(h));
return;
}
}
break 'outer; break 'outer;
} }