urbit/jets/b/flop.c
2015-06-23 21:29:11 -04:00

49 lines
651 B
C

/* j/2/flop.c
**
*/
#include "all.h"
/* functions
*/
u3_noun
u3qb_flop(u3_noun a)
{
u3_noun b = 0;
while ( 1 ) {
if ( u3_nul == a ) {
return b;
}
else if ( c3n == u3du(a) ) {
u3z(b);
return u3m_bail(c3__exit);
}
else {
b = u3nc(u3k(u3h(a)), b);
a = u3t(a);
}
}
}
u3_noun
u3wb_flop(u3_noun cor)
{
u3_noun a;
if ( u3_none == (a = u3r_at(u3x_sam, cor)) ) {
return u3m_bail(c3__exit);
} else {
return u3qb_flop(a);
}
}
u3_noun
u3kb_flop(u3_noun a)
{
u3_noun b = u3qb_flop(a);
u3z(a);
return b;
}