mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-18 12:22:10 +03:00
46 lines
837 B
C
46 lines
837 B
C
/* j/2/skid.c
|
|
**
|
|
*/
|
|
#include "all.h"
|
|
|
|
|
|
/* functions
|
|
*/
|
|
u3_noun
|
|
u3qb_skid(u3_noun a,
|
|
u3_noun b)
|
|
{
|
|
if ( 0 == a ) {
|
|
return u3nc(u3_nul, u3_nul);
|
|
}
|
|
else if ( c3n == u3du(a) ) {
|
|
return u3m_bail(c3__exit);
|
|
} else {
|
|
u3_noun acc = u3qb_skid(u3t(a), b);
|
|
u3_noun hoz = u3n_slam_on(u3k(b), u3k(u3h(a)));
|
|
u3_noun nex;
|
|
|
|
if ( c3y == hoz ) {
|
|
nex = u3nc(u3nc(u3k(u3h(a)), u3k(u3h(acc))), u3k(u3t(acc)));
|
|
}
|
|
else {
|
|
nex = u3nc(u3k(u3h(acc)), u3nc(u3k(u3h(a)), u3k(u3t(acc))));
|
|
}
|
|
u3z(hoz);
|
|
u3z(acc);
|
|
|
|
return nex;
|
|
}
|
|
}
|
|
u3_noun
|
|
u3wb_skid(u3_noun cor)
|
|
{
|
|
u3_noun a, b;
|
|
|
|
if ( c3n == u3r_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0) ) {
|
|
return u3m_bail(c3__exit);
|
|
} else {
|
|
return u3qb_skid(a, b);
|
|
}
|
|
}
|