shrub/j/c/dis.c
2014-11-17 13:56:51 -08:00

53 lines
963 B
C

/* j/3/dis.c
**
** This file is in the public domain.
*/
#include "all.h"
/* functions
*/
u3_noun
u3qc_dis(u3_atom a,
u3_atom b)
{
c3_w lna_w = u3r_met(5, a);
c3_w lnb_w = u3r_met(5, b);
if ( (lna_w == 0) && (lnb_w == 0) ) {
return 0;
} else {
c3_w len_w = c3_max(lna_w, lnb_w);
c3_w* sal_w = u3a_slab(len_w);
if ( 0 == sal_w ) {
return u3m_bail(c3__fail);
}
else {
c3_w i_w;
u3r_chop(5, 0, lna_w, 0, sal_w, a);
for ( i_w = 0; i_w < len_w; i_w++ ) {
sal_w[i_w] &= (i_w >= lnb_w) ? 0 : u3r_word(i_w, b);
}
return u3a_malt(sal_w);
}
}
}
u3_noun
u3wc_dis(u3_noun cor)
{
u3_noun a, b;
if ( (c3n == u3r_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0)) ||
(c3n == u3ud(a)) ||
(c3n == u3ud(b)) )
{
return u3m_bail(c3__exit);
} else {
return u3qc_dis(a, b);
}
}