urbit/gen191/2/skip.c
2013-09-28 13:21:18 -07:00

53 lines
1.4 KiB
C

/* j/2/skip.c
**
** This file is in the public domain.
*/
#include "all.h"
#include "../pit.h"
/* functions
*/
u2_weak // transfer
j2_mbc(Pt2, skip)(u2_wire wir_r,
u2_noun a, // retain
u2_noun b) // retain
{
if ( _0 == a ) {
return a;
}
else if ( u2_no == u2_dust(a) ) {
return u2_none;
} else {
u2_weak hoz = u2_nk_mong(wir_r, b, u2_rx(wir_r, u2_h(a)));
u2_weak vyr = j2_mbc(Pt2, skip)(wir_r, u2_t(a), b);
switch ( hoz ) {
case u2_yes: return vyr;
case u2_no: return u2_rc(wir_r, u2_rx(wir_r, u2_h(a)), vyr);
default: u2_rl_lose(wir_r, hoz);
u2_rl_lose(wir_r, vyr);
return u2_none;
}
}
}
u2_noun // transfer
j2_mb(Pt2, skip)(u2_wire wir_r,
u2_noun cor) // retain
{
u2_noun a, b;
if ( u2_no == u2_mean(cor, u2_cv_sam_2, &a, u2_cv_sam_3, &b, 0) ) {
return u2_none;
} else {
return j2_mbc(Pt2, skip)(wir_r, a, b);
}
}
/* structures
*/
u2_ho_jet
j2_mbj(Pt2, skip)[] = {
{ ".2", c3__lite, j2_mb(Pt2, skip), Tier2, u2_none, u2_none },
{ }
};