urbit/jets/b/levy.c at sdl · dominic22/urbit

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/* j/2/levy.c

#include "all.h"

static u3_noun

_levy_in(u3j_site* sit_u, u3_noun a)

{

if ( 0 == a ) {

return c3y;

} else {

u3_noun loz;

if ( c3n == u3du(a) ) {

return u3m_bail(c3__exit);

}

else switch ( (loz = u3j_gate_slam(sit_u, u3k(u3h(a)))) ) {

case c3y: return _levy_in(sit_u, u3t(a));

case c3n: return c3n;

default: u3z(loz);

return u3m_bail(c3__exit);

}

/* functions

u3_noun

u3qb_levy(u3_noun a,

u3_noun b)

{

u3_noun pro;

u3j_site sit_u;

u3j_gate_prep(&sit_u, u3k(b));

pro = _levy_in(&sit_u, a);

u3j_gate_lose(&sit_u);

return pro;

}

u3_noun

u3wb_levy(u3_noun cor)

{

u3_noun a, b;

if ( c3n == u3r_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0) ) {

return u3m_bail(c3__exit);

} else {

return u3qb_levy(a, b);

}