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WIP simplified conditionals, still dies, appears stateful?

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This commit is contained in:
Ted Blackman 2019-01-15 20:03:24 -08:00
parent e815ad4be7
commit 6d70ad19dd
1 changed files with 34 additions and 39 deletions
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73
noun/retrieve.c
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@ -1694,58 +1694,53 @@ u3r_mug(u3_noun veb)
c3_w a;
c3_w b;
u3a_noun* veb_u;
u3_noun hed, tal;
while ( don != fam ) {
a = fam->a;
b = fam->b;
veb = fam->veb;
veb_u = u3a_to_ptr(veb);
//u3m_p("veb", veb);
c3_assert(_(u3a_is_cell(veb)));
// already mugged; pop stack
//
if ( veb_u->mug_w ) {
//fprintf(stderr, "already mugged\r\n");
mug_w = veb_u->mug_w;
fam = _mug_pop(mov, off, mug_w);
}
// neither head nor tail are mugged; start with head
//
else if ( 0 == a ) {
hed = u3h(veb);
if ( _(u3a_is_atom(hed)) ) {
fam->a = _mug_atom(hed);
}
else {
fam = _mug_push(mov, off, hed);
}
}
// head is mugged, but not tail; mug tail or push tail onto stack
//
else if ( 0 == b ) {
tal = u3t(veb);
if ( _(u3a_is_atom(tal)) ) {
fam->b = _mug_atom(tal);
}
else {
fam = _mug_push(mov, off, tal);
}
}
// both head and tail are mugged; combine them and pop stack
//
if ( (0 != a) && (0 != b) ) {
fprintf(stderr, "combining head and tail mugs\r\n");
else {
//fprintf(stderr, "combining head and tail mugs\r\n");
mug_w = u3r_mug_both(a, b);
veb_u->mug_w = mug_w;
fam = _mug_pop(mov, off, mug_w);
}
// head is mugged, but not tail; push tail onto stack
//
else if ( (0 != a) && (0 == b) ) {
if ( _(u3a_is_atom(u3t(veb))) ) {
fprintf(stderr, "tail is atom\r\n");
mug_w = _mug_atom(u3t(veb));
fam->b = mug_w;
}
else {
fprintf(stderr, "pushing tail\r\n");
fam = _mug_push(mov, off, u3t(veb));
}
}
// cell, and neither head nor tail is mugged; push head onto stack
//
else {
fprintf(stderr, "asserting cell\r\n");
c3_assert(_(u3a_is_cell(veb)));
// already mugged; pop stack
//
if ( veb_u->mug_w ) {
fprintf(stderr, "already mugged\r\n");
mug_w = veb_u->mug_w;
fam = _mug_pop(mov, off, mug_w);
}
else {
if ( _(u3a_is_atom(u3h(veb))) ) {
fprintf(stderr, "head is atom\r\n");
mug_w = _mug_atom(u3h(veb));
fam->a = mug_w;
}
else {
fprintf(stderr, "pushing head\r\n");
fam = _mug_push(mov, off, u3h(veb));
}
}
}
}
u3R->cap_p = empty;
return mug_w;