urbit/jets/b/murn.c
2015-09-15 13:59:00 -04:00

47 lines
867 B
C

/* j/2/murn.c
**
*/
#include "all.h"
/* functions
*/
u3_noun
u3qb_murn(u3_noun a, u3_noun b)
{
if ( 0 == a ) {
return a;
}
else if ( c3n == u3du(a) ) {
return u3m_bail(c3__exit);
}
else {
u3_noun one = u3n_slam_on(u3k(b), u3k(u3h(a)));
u3_noun two = u3qb_murn(u3t(a), b);
u3_noun nex;
switch ( u3ud(one) ) {
case c3y: u3z(one);
return two;
case c3n: nex = u3nc(u3k(u3t(one)), two);
u3z(one);
return nex;
default: u3z(one);
u3z(two);
return u3_none;
}
}
}
u3_noun
u3wb_murn(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_murn(a, b);
}
}