/* logic
*/
static u3_noun
_cqfu_conk(u3_noun van,
u3_noun sut,
u3_noun got)
{
if ( c3y == u3ud(got) ) {
u3_noun ret = u3qf_face(u3k(got), sut);
return ret;
}
else switch ( u3h(got) ) {
default: return u3m_bail(c3__fail);
case 0: {
return u3k(sut);
}
case 1: {
u3_noun c*k = _cqfu_conk(van, sut, u3t(u3t(got)));
u3_noun nux = u3k(u3h(u3t(got)));
u3_noun ret = u3qf_face(nux, c*k);
u3z(nux);
u3z(c*k);
return ret;
}
case 2: {
u3_noun vet = u3r_at(u3qfu_van_vet, van);
u3_noun hed, tal, deh, lat, ret;
if ( c3y == vet ) {
u3_noun cel = u3nt(c3__cell, c3__noun, c3__noun);
if ( c3n == u3qfu_nest(van, cel, c3y, sut) ) {
return u3m_bail(c3__fail);
}
u3z(cel);
}
hed = u3qfu_peek(van, sut, c3__both, 2);
tal = u3qfu_peek(van, sut, c3__both, 3);
deh = _cqfu_conk(van, hed, u3h(u3t(got)));
lat = _cqfu_conk(van, tal, u3t(u3t(got)));
ret = u3qf_cell(deh, lat);
u3z(lat);
u3z(deh);
u3z(tal);
u3z(hed);
return ret;
}
}
}
static u3_noun
_nest_cong(u3_noun van,
u3_noun sut,
u3_noun tel,
u3_noun ref,
u3_noun gil)
{
u3_noun p_sut, q_sut, p_ref, q_ref;
u3_noun pq_sut, qq_sut, rq_sut;
u3_noun pq_ref, qq_ref, rq_ref;
u3_noun prq_sut, qrq_sut, prq_ref, qrq_ref;
u3_noun ret;
u3x_trel(sut, 0, &p_sut, &q_sut);
u3x_trel(ref, 0, &p_ref, &q_ref);
u3x_trel(q_sut, &pq_sut, &qq_sut, &rq_sut);
u3x_trel(q_ref, &pq_ref, &qq_ref, &rq_ref);
u3x_cell(rq_sut, &prq_sut, &qrq_sut);
u3x_cell(rq_ref, &prq_ref, &qrq_ref);
if ( c3y == u3r_sing(q_sut, q_ref) ) {
return _nest_dext(van, p_sut, tel, p_ref, gil);
}
else if ( (c3n == _nest_dext(van, qq_sut, tel, p_sut, gil)) ||
(c3n == _nest_dext(van, p_sut, tel, qq_sut, gil)) ||
(c3n == _nest_dext(van, qq_ref, tel, p_ref, gil)) )
{
return c3n;
}
else {
if ( (pq_sut != pq_ref) && (c3__gold != pq_ref) ) {
return c3n;
}
else {
u3_noun hud = u3nc(u3k(sut), u3k(ref));
if ( (c3y == u3qdi_has(gil, hud)) ) {
u3z(hud);
return c3y;
}
else {
u3_noun zoc = u3qdi_put(gil, hud);
u3_noun tus = u3nt(c3__core,
u3k(qq_sut),
u3k(q_sut));
u3_noun fer = u3nt(c3__core,
u3k(qq_ref),
u3k(q_ref));
ret = _nest_cram(van, tus, tel, fer, qrq_sut, qrq_ref, zoc);
u3z(fer);
u3z(tus);
u3z(zoc);
u3z(hud);
if ( c3n == ret ) {
return c3n;
}
else {
switch ( pq_sut ) {
default: return u3m_bail(c3__fail);
case c3__gold: {
return
c3a(_nest_dext(van, qq_sut, tel, qq_ref, gil),
_nest_dext(van, qq_ref, tel, qq_sut, gil));
}
case c3__iron: {
u3_noun s_sam = u3qfu_peek
(van, qq_sut, c3__rite, 2);
u3_noun r_sam = u3qfu_peek
(van, qq_ref, c3__rite, 2);
u3_noun ret = _nest_dext(van, r_sam, tel, s_sam, gil);
u3z(r_sam);
u3z(s_sam);
return ret;
}
case c3__lead: {
return c3y;
}
case c3__zinc: {
u3_noun s_pal = u3qfu_peek
(van, qq_sut, c3__read, 2);
u3_noun r_pal = u3qfu_peek
(van, qq_ref, c3__read, 2);
u3_noun ret = _nest_dext(van, s_pal, tel, r_pal, gil);
u3z(r_pal);
u3z(s_pal);
return ret;
}
}
}
}
}
}
}
