/* u2_cke_cue(): expand saved pill.
*/
static u2_noun // produce
_cue_in(u2_wire wir_r,
u2_atom a, // retain
u2_atom b, // retain
u2_ray t_r) // retain
{
u2_noun p, q;
if ( _0 == j2_mbc(Pt3, cut)(wir_r, 0, b, 1, a) ) {
u2_noun x = j2_mbc(Pt1, inc)(wir_r, b);
u2_noun c = j2_mby(Pt5, rub)(wir_r, x, a);
p = j2_mbc(Pt1, inc)(wir_r, u2_h(c));
q = u2_rx(wir_r, u2_t(c));
q = u2_cs_save(wir_r, t_r, 0, b, q);
u2_rz(wir_r, c);
u2_rz(wir_r, x);
}
else {
u2_noun c = j2_mbc(Pt1, add)(wir_r, _2, b);
u2_noun l = j2_mbc(Pt1, inc)(wir_r, b);
if ( _0 == j2_mbc(Pt3, cut)(wir_r, 0, l, 1, a) ) {
u2_noun u, v, w;
u2_noun x, y;
u = _cue_in(wir_r, a, c, t_r);
x = j2_mbc(Pt1, add)(wir_r, u2_h(u), c);
v = _cue_in(wir_r, a, x, t_r);
w = u2_bc(wir_r, u2_rx(wir_r, u2_t(u)),
u2_rx(wir_r, u2_t(v)));
y = j2_mbc(Pt1, add)(wir_r, u2_h(u), u2_h(v));
p = j2_mbc(Pt1, add)(wir_r, _2, y);
q = u2_cs_save(wir_r, t_r, 0, b, w);
u2_rz(wir_r, u); u2_rz(wir_r, v); u2_rz(wir_r, x); u2_rz(wir_r, y);
}
else {
u2_noun d = j2_mby(Pt5, rub)(wir_r, c, a);
u2_weak x = u2_cs_find(wir_r, t_r, 0, u2_t(d));
p = j2_mbc(Pt1, add)(wir_r, _2, u2_h(d));
if ( u2_none == x ) {
return u2_bl_bail(wir_r, c3__fail);
}
q = u2_rx(wir_r, x);
u2_rz(wir_r, d);
}
u2_rz(wir_r, l);
u2_rz(wir_r, c);
}
return u2_bc(wir_r, p, q);
}
u2_noun // transfer
_cue_internal(u2_wire wir_r,
u2_atom a) // retain
{
u2_ray t_r = u2_cs_make(wir_r);
u2_noun x = _cue_in(wir_r, a, _0, t_r);
u2_noun y = u2_rx(wir_r, u2_t(x));
u2_rz(wir_r, x);
u2_cs_free(wir_r, t_r);
return y;
}
u2_noun // transfer
j2_mby(Pt5, cue)(u2_wire wir_r,
u2_atom a) // retain
{
T_r = u2_na_make();
u2_noun x = _cue_in(wir_r, a, _0);
u2_noun y = u2_rx(wir_r, u2_h(u2_t(x)));
u2_na_take(T_r);
T_r = 0;
u2_rz(wir_r, x);
return y;
}
