urbit/j/3/mix.c
2014-09-05 12:55:16 -07:00

53 lines
976 B
C

/* j/3/mix.c
**
** This file is in the public domain.
*/
#include "all.h"
/* functions
*/
u2_noun
u2_cqc_mix(u2_atom a,
u2_atom b)
{
c3_w lna_w = u2_cr_met(5, a);
c3_w lnb_w = u2_cr_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 = u2_ca_slab(len_w);
if ( 0 == sal_w ) {
return u2_cm_bail(c3__fail);
}
else {
c3_w i_w;
u2_cr_chop(5, 0, lna_w, 0, sal_w, a);
for ( i_w = 0; i_w < lnb_w; i_w++ ) {
sal_w[i_w] ^= u2_cr_word(i_w, b);
}
return u2_ca_malt(sal_w);
}
}
}
u2_noun
u2_cwc_mix(u2_noun cor)
{
u2_noun a, b;
if ( (u2_no == u2_cr_mean(cor, u2_cv_sam_2, &a, u2_cv_sam_3, &b, 0)) ||
(u2_no == u2ud(a)) ||
(u2_no == u2ud(b)) )
{
return u2_cm_bail(c3__exit);
} else {
return u2_cqc_mix(a, b);
}
}