mirror of
https://github.com/urbit/shrub.git
synced 2024-12-17 07:14:52 +03:00
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/* j/6/comb.c
|
|
**
|
|
*/
|
|
#include "all.h"
|
|
|
|
|
|
/* functions
|
|
*/
|
|
u3_noun
|
|
u3qf_comb(u3_noun mal,
|
|
u3_noun buz)
|
|
{
|
|
if ( (u3_none == mal) || (u3_none == buz) ) {
|
|
return u3_none;
|
|
}
|
|
else {
|
|
u3_noun p_mal, q_mal, p_buz, q_buz, pp_buz, pq_buz;
|
|
|
|
if ( (c3y == u3r_p(mal, 0, &p_mal)) && (0 != p_mal) ) {
|
|
if ( (c3y == u3r_p(buz, 0, &p_buz)) && (0 != p_buz) ) {
|
|
return u3nc(0,
|
|
u3qc_peg(p_mal, p_buz));
|
|
}
|
|
else if ( c3y == u3r_pq(buz, 2, &p_buz, &q_buz) &&
|
|
c3y == u3r_p(p_buz, 0, &pp_buz) &&
|
|
c3y == u3r_p(q_buz, 0, &pq_buz) )
|
|
{
|
|
return u3nt(2,
|
|
u3nc(0,
|
|
u3qc_peg(p_mal, pp_buz)),
|
|
u3nc(0,
|
|
u3qc_peg(p_mal, pq_buz)));
|
|
}
|
|
else return u3nt(7,
|
|
u3k(mal),
|
|
u3k(buz));
|
|
}
|
|
#if 1
|
|
else if ( (c3y == u3r_bush(mal, &p_mal, &q_mal)) &&
|
|
(c3y == u3du(p_mal)) &&
|
|
(c3y == u3du(q_mal)) &&
|
|
(0 == u3h(q_mal)) &&
|
|
(1 == u3t(q_mal)) )
|
|
{
|
|
return u3nt(8,
|
|
u3k(p_mal),
|
|
u3k(buz));
|
|
}
|
|
#endif
|
|
else if ( (c3y == u3r_p(buz, 0, &p_buz)) &&
|
|
(c3y == u3r_sing(1, p_buz)) )
|
|
{
|
|
return u3k(mal);
|
|
}
|
|
else return u3nt(7,
|
|
u3k(mal),
|
|
u3k(buz));
|
|
}
|
|
}
|
|
u3_noun
|
|
u3wf_comb(u3_noun cor)
|
|
{
|
|
u3_noun mal, buz;
|
|
|
|
if ( c3n == u3r_mean(cor, u3x_sam_2, &mal, u3x_sam_3, &buz, 0) ) {
|
|
return u3_none;
|
|
} else {
|
|
return u3qf_comb(mal, buz);
|
|
}
|
|
}
|