mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-24 07:26:51 +03:00
50 lines
802 B
C
50 lines
802 B
C
/* j/3/peg.c
|
|
**
|
|
** This file is in the public domain.
|
|
*/
|
|
#include "all.h"
|
|
|
|
|
|
/* functions
|
|
*/
|
|
u3_noun
|
|
u3_cqc_peg(
|
|
u3_atom a,
|
|
u3_atom b)
|
|
{
|
|
u3_atom c, d, e, f, g, h;
|
|
|
|
c = u3_cr_met(0, b);
|
|
d = u3_cqa_dec(c);
|
|
e = u3_cqc_lsh(0, d, 1);
|
|
f = u3_cqa_sub(b, e);
|
|
g = u3_cqc_lsh(0, d, a);
|
|
h = u3_cqa_add(f, g);
|
|
|
|
u3z(c);
|
|
u3z(d);
|
|
u3z(e);
|
|
u3z(f);
|
|
u3z(g);
|
|
|
|
return h;
|
|
}
|
|
u3_noun
|
|
u3_cwc_peg(
|
|
u3_noun cor)
|
|
{
|
|
u3_noun a, b;
|
|
|
|
if ( (u3_no == u3_cr_mean(cor, u3_cv_sam_2, &a, u3_cv_sam_3, &b, 0)) ||
|
|
(u3_no == u3ud(a)) ||
|
|
(u3_no == u3ud(b)) ||
|
|
(0 == a) ||
|
|
(0 == b) )
|
|
{
|
|
return u3_cm_bail(c3__exit);
|
|
} else {
|
|
return u3_cqc_peg(a, b);
|
|
}
|
|
}
|
|
|