mirror of
https://github.com/urbit/shrub.git
synced 2024-12-17 23:32:56 +03:00
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
|
/* j/3/tape.c
|
||
|
|
**
|
||
|
|
** This file is in the public domain.
|
||
|
|
*/
|
||
|
|
#include "all.h"
|
||
|
|
#include "../pit.h"
|
||
|
|
|
||
|
|
/* functions
|
||
|
|
*/
|
||
|
|
static u2_noun // transfer
|
||
|
|
_norm(u2_wire wir_r,
|
||
|
|
u2_noun a) // retain
|
||
|
|
{
|
||
|
|
if ( u2_no == u2du(a) ) {
|
||
|
|
return u2_nul;
|
||
|
|
} else {
|
||
|
|
return u2nc(((u2_yes == u2du(u2h(a))) ? u2_nul : u2k(u2h(a))),
|
||
|
|
_norm(wir_r, u2t(a)));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static u2_bean
|
||
|
|
_good(u2_wire wir_r,
|
||
|
|
u2_noun a) // retain
|
||
|
|
{
|
||
|
|
while ( 1 ) {
|
||
|
|
if ( u2_nul == a ) {
|
||
|
|
return u2_yes;
|
||
|
|
}
|
||
|
|
if ( u2_no == u2ud(u2h(a)) ) {
|
||
|
|
return u2_no;
|
||
|
|
}
|
||
|
|
a = u2t(a);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
u2_noun // transfer
|
||
|
|
j2_mby(PtM, tape)(u2_wire wir_r,
|
||
|
|
u2_noun a) // retain
|
||
|
|
{
|
||
|
|
if ( u2_yes == _good(wir_r, a) ) {
|
||
|
|
fprintf(stderr, "good!\r\n");
|
||
|
|
return u2k(a);
|
||
|
|
} else {
|
||
|
|
return _norm(wir_r, a);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
u2_noun // transfer
|
||
|
|
j2_mb(PtM, tape)(u2_wire wir_r,
|
||
|
|
u2_noun cor) // retain
|
||
|
|
{
|
||
|
|
u2_noun a;
|
||
|
|
|
||
|
|
if ( (u2_none == (a = u2_frag(u2_cv_sam, cor))) ) {
|
||
|
|
return u2_bl_bail(wir_r, c3__fail);
|
||
|
|
} else {
|
||
|
|
return j2_mby(PtM, tape)(wir_r, a);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* structures
|
||
|
|
*/
|
||
|
|
u2_ho_jet
|
||
|
|
j2_mbj(PtM, tape)[] = {
|
||
|
|
{ ".2", c3__hevy, j2_mb(PtM, tape), Tier3, u2_none, u2_none },
|
||
|
|
{ }
|
||
|
|
};
|