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/// @file
#include "jets/k.h"
#include "jets/q.h"
#include "jets/w.h"
#include "noun.h"
/* internal functions
*/
static u3_noun
_in_uni(u3_noun a, u3_noun b)
{
if ( u3_nul == a ) {
return u3k(b);
}
else if ( u3_nul == b ) {
return u3k(a);
}
else {
u3_noun n_a, l_a, r_a,
n_b, l_b, r_b,
neb, sub, naw, pro;
u3x_trel(a, &n_a, &l_a, &r_a);
u3x_trel(b, &n_b, &l_b, &r_b);
if ( c3n == u3qc_mor(n_a, n_b) ) {
if ( c3y == u3r_sing(n_a, n_b) ) {
return u3nt(u3k(n_b), _in_uni(l_a, l_b), _in_uni(r_a, r_b));
}
else if ( c3y == u3qc_gor(n_a, n_b) ) {
naw = u3nt(u3k(n_a), u3k(l_a), u3_nul);
sub = _in_uni(naw, l_b);
neb = u3nt(u3k(n_b), sub, u3k(r_b));
pro = _in_uni(r_a, neb);
u3z(naw); u3z(neb);
return pro;
}
else {
naw = u3nt(u3k(n_a), u3_nul, u3k(r_a));
sub = _in_uni(naw, r_b);
neb = u3nt(u3k(n_b), u3k(l_b), sub);
pro = _in_uni(l_a, neb);
u3z(naw); u3z(neb);
return pro;
}
}
else if ( c3y == u3r_sing(n_b, n_a) ) {
return u3nt(u3k(n_b), _in_uni(l_a, l_b), _in_uni(r_a, r_b));
}
else if ( c3y == u3qc_gor(n_b, n_a) ) {
neb = u3nt(u3k(n_b), u3k(l_b), u3_nul);
sub = _in_uni(l_a, neb);
naw = u3nt(u3k(n_a), sub, u3k(r_a));
pro = _in_uni(naw, r_b);
u3z(neb); u3z(naw);
return pro;
}
else {
neb = u3nt(u3k(n_b), u3_nul, u3k(r_b));
sub = _in_uni(r_a, neb);
naw = u3nt(u3k(n_a), u3k(l_a), sub);
pro = _in_uni(naw, l_b);
u3z(neb); u3z(naw);
return pro;
}
}
}
u3_noun
u3kdi_uni(u3_noun a,
u3_noun b)
{
u3_noun c = u3qdi_uni(a, b);
u3z(a); u3z(b);
return c;
}
u3_noun
u3qdi_uni(u3_noun a,
u3_noun b)
{
if ( c3y == u3r_sing(a, b) ) {
return u3k(a);
}
else {
return _in_uni(a, b);
}
}
u3_noun
u3wdi_uni(u3_noun cor)
{
u3_noun a, b;
u3x_mean(cor, u3x_sam, &b, u3x_con_sam, &a, 0);
return u3qdi_uni(a, b);
}
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