mirror of
https://github.com/urbit/shrub.git
synced 2024-12-23 19:05:48 +03:00
46 lines
632 B
C
46 lines
632 B
C
/* j/3/mas.c
|
|
**
|
|
*/
|
|
#include "all.h"
|
|
|
|
|
|
/* functions
|
|
*/
|
|
u3_noun
|
|
u3qc_mas(u3_atom a)
|
|
{
|
|
c3_w b_w;
|
|
u3_atom c, d, e, f;
|
|
|
|
b_w = u3r_met(0, a);
|
|
if ( b_w < 2 ) {
|
|
return u3m_bail(c3__exit);
|
|
}
|
|
else {
|
|
c = u3qc_bex((b_w - 1));
|
|
d = u3qc_bex((b_w - 2));
|
|
e = u3qa_sub(a, c);
|
|
f = u3qc_con(e, d);
|
|
|
|
u3z(c);
|
|
u3z(d);
|
|
u3z(e);
|
|
|
|
return f;
|
|
}
|
|
}
|
|
u3_noun
|
|
u3wc_mas(u3_noun cor)
|
|
{
|
|
u3_noun a;
|
|
|
|
if ( (u3_none == (a = u3r_at(u3x_sam, cor))) ||
|
|
(c3n == u3ud(a)) )
|
|
{
|
|
return u3m_bail(c3__exit);
|
|
} else {
|
|
return u3qc_mas(a);
|
|
}
|
|
}
|
|
|