mirror of
https://github.com/urbit/shrub.git
synced 2024-12-17 23:32:56 +03:00
44 lines
722 B
C
44 lines
722 B
C
/* j/6/flip.c
|
|
**
|
|
** This file is in the public domain.
|
|
*/
|
|
#include "all.h"
|
|
|
|
|
|
/* functions
|
|
*/
|
|
u3_noun
|
|
u3_cqf_flip(
|
|
u3_noun hel)
|
|
{
|
|
if ( c3y == u3_cr_sing(1, u3h(hel)) ) {
|
|
if ( (c3y == u3t(hel)) ) {
|
|
return u3nc(1, c3n);
|
|
}
|
|
else {
|
|
c3_assert((c3n == u3t(hel)));
|
|
|
|
return u3nc(1, c3y);
|
|
}
|
|
}
|
|
else {
|
|
return u3nq
|
|
(6,
|
|
u3k(hel),
|
|
u3nc(1, c3n),
|
|
u3nc(1, c3y));
|
|
}
|
|
}
|
|
u3_noun
|
|
u3_cwf_flip(
|
|
u3_noun cor)
|
|
{
|
|
u3_noun hel;
|
|
|
|
if ( c3nne == (hel = u3_cr_at(u3_cv_sam, cor)) ) {
|
|
return u3_cm_bail(c3__fail);
|
|
} else {
|
|
return u3_cqf_flip(hel);
|
|
}
|
|
}
|