urbit/j/d/in_has.c
2014-11-06 11:49:41 -08:00

58 lines
1009 B
C

/* j/4/in_has.c
**
** This file is in the public domain.
*/
#include "all.h"
/* functions
*/
u3_noun
u3qdi_has(u3_noun a, u3_noun b)
{
if ( u3_nul == a ) {
return c3n;
}
else {
u3_noun l_a, n_a, r_a;
if ( (c3n == u3r_mean(a, 2, &n_a, 6, &l_a, 7, &r_a, 0)) ) {
return u3m_bail(c3__exit);
}
else {
if ( (c3y == u3r_sing(b, n_a)) ) {
return c3y;
}
else {
if ( c3y == u3qc_hor(b, n_a) ) {
return u3qdi_has(l_a, b);
}
else return u3qdi_has(r_a, b);
}
}
}
}
u3_noun
u3wdi_has(u3_noun cor)
{
u3_noun a, b;
if ( c3n == u3r_mean(cor, u3v_sam, &b, u3v_con_sam, &a, 0) ) {
return u3m_bail(c3__exit);
} else {
return u3qdi_has(a, b);
}
}
u3_noun
u3kdi_has(u3_noun a, u3_noun b)
{
u3_weak c = u3qdi_has(a, b);
u3z(a); u3z(b);
if ( u3_none == c ) {
return u3m_bail(c3__exit);
}
else return c;
}