mirror of
https://github.com/urbit/shrub.git
synced 2024-12-23 19:05:48 +03:00
53 lines
825 B
C
53 lines
825 B
C
/* j/2/scag.c
|
|
**
|
|
*/
|
|
#include "all.h"
|
|
|
|
|
|
/* functions
|
|
*/
|
|
u3_noun
|
|
u3qb_scag(u3_atom a,
|
|
u3_noun b)
|
|
{
|
|
if ( u3_nul == b ) {
|
|
return u3_nul;
|
|
}
|
|
else if ( !_(u3a_is_cat(a)) ) {
|
|
return u3m_bail(c3__fail);
|
|
}
|
|
else {
|
|
u3_noun acc = u3_nul;
|
|
c3_w i_w = a;
|
|
|
|
if ( !i_w )
|
|
return u3_nul;
|
|
|
|
while ( i_w ) {
|
|
if ( c3n == u3du(b) ) {
|
|
return u3kb_flop(acc);
|
|
}
|
|
acc = u3nc(u3k(u3h(b)), acc);
|
|
b = u3t(b);
|
|
i_w--;
|
|
}
|
|
|
|
return u3kb_flop(acc);
|
|
}
|
|
}
|
|
|
|
u3_noun
|
|
u3wb_scag(u3_noun cor)
|
|
{
|
|
u3_noun a, b;
|
|
|
|
if ( (c3n == u3r_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0)) ||
|
|
(c3n == u3ud(a) && u3_nul != b) )
|
|
{
|
|
return u3m_bail(c3__exit);
|
|
} else {
|
|
return u3qb_scag(a, b);
|
|
}
|
|
}
|
|
|