mirror of
https://github.com/urbit/shrub.git
synced 2024-12-18 07:42:20 +03:00
33 lines
576 B
C
33 lines
576 B
C
/* j/6/sift.c
|
|
**
|
|
*/
|
|
#include "all.h"
|
|
|
|
|
|
/* boilerplate
|
|
*/
|
|
u3_noun
|
|
u3wfu_sift(
|
|
u3_noun cor)
|
|
{
|
|
u3_noun sut, ref, van;
|
|
|
|
if ( (c3n == u3r_mean(cor, u3x_sam, &ref,
|
|
u3x_con, &van,
|
|
0)) ||
|
|
(u3_none == (sut = u3r_at(u3x_sam, van))) )
|
|
{
|
|
return u3m_bail(c3__fail);
|
|
} else {
|
|
return u3qfu_sift(van, sut, ref);
|
|
}
|
|
}
|
|
|
|
u3_noun
|
|
u3qfu_sift(u3_noun van,
|
|
u3_noun sut,
|
|
u3_noun ref)
|
|
{
|
|
return u3k(ref);
|
|
}
|