urbit/j/2/weld.c
2014-09-05 13:13:24 -07:00

44 lines
713 B
C

/* j/2/weld.c
**
** This file is in the public domain.
*/
#include "all.h"
/* functions
*/
u3_noun
u3_cqb_weld(u3_noun a,
u3_noun b)
{
if ( 0 == a ) {
return u3k(b);
}
else if ( u3_no == u3du(a) ) {
return u3_cm_bail(c3__exit);
}
else {
return u3nc(u3k(u3h(a)), u3_cqb_weld(u3t(a), b));
}
}
u3_noun
u3_cwb_weld(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) ) {
return u3_cm_bail(c3__exit);
} else {
return u3_cqb_weld(a, b);
}
}
u3_noun
u3_ckb_weld(u3_noun a, u3_noun b)
{
u3_noun c = u3_cqb_weld(a, b);
u3z(a); u3z(b);
return c;
}