shrub/jets/f/ut_fish.c

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/* j/6/fish.c
**
*/
#include "all.h"
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/* functions
*/
static u3_noun
_fish_in(u3_noun, u3_noun, u3_atom, u3_noun);
static u3_noun
_fish_frog(u3_noun van,
u3_noun p_sut,
u3_atom axe,
u3_noun vit)
{
if ( u3_nul == p_sut ) {
return u3nc(1, 1);
}
else {
u3_noun hed = _fish_in(van, u3h(p_sut), axe, vit);
u3_noun tal = _fish_frog(van, u3t(p_sut), axe, vit);
u3_noun pro = u3qf_flor(hed, tal);
u3z(hed);
u3z(tal);
return pro;
}
}
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static u3_noun
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_fish_in(u3_noun van,
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u3_noun sut,
u3_atom axe,
u3_noun vit)
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{
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u3_noun p_sut, q_sut;
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if ( c3y == u3ud(sut) ) switch ( sut ) {
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default: return u3m_bail(c3__fail);
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case c3__noun: {
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return u3nc(1, 0);
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}
case c3__void: {
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return u3nc(1, 1);
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}
}
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else switch ( u3h(sut) ) {
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default: return u3m_bail(c3__fail);
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case c3__atom: {
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if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
return u3m_bail(c3__fail);
} else {
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if ( c3n == u3du(q_sut) ) {
u3_noun ton = u3nt(3, 0, u3k(axe));
u3_noun pro = u3qf_flip(ton);
u3z(ton);
return pro;
} else {
return u3nt(5,
u3nc(1, u3k(u3t(q_sut))),
u3nc(0, u3k(axe)));
}
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}
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}
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case c3__cell: {
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if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
return u3m_bail(c3__fail);
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} else {
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u3_noun hut = u3nt(3, 0, u3k(axe));
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u3_noun lef = u3qc_peg(axe, 2);
u3_noun rit = u3qc_peg(axe, 3);
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u3_noun hed = _fish_in(van, p_sut, lef, vit);
u3_noun tal = _fish_in(van, q_sut, rit, vit);
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u3_noun hob = u3qf_flan(hed, tal);
u3_noun vug = u3qf_flan(hut, hob);
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u3z(hob);
u3z(tal);
u3z(hed);
u3z(rit);
u3z(lef);
u3z(hut);
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return vug;
}
}
case c3__core: {
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return u3nc(0, 0);
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}
case c3__face: {
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if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
return u3m_bail(c3__fail);
} else {
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return _fish_in(van, q_sut, axe, vit);
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}
}
case c3__fork: {
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if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
return u3m_bail(c3__fail);
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}
else {
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u3_noun hed = _fish_in(van, p_sut, axe, vit);
u3_noun tal = _fish_in(van, q_sut, axe, vit);
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u3_noun pro = u3qf_flor(hed, tal);
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u3z(hed);
u3z(tal);
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return pro;
}
}
case c3__frog: {
p_sut = u3t(sut);
return _fish_frog(van, p_sut, axe, vit);
}
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case c3__hold: {
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p_sut = u3t(sut);
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{
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if ( (c3y == u3qdi_has(vit, sut)) ) {
// u3_noun dun = u3qfu_dunq(van, "type", sut);
u3_noun niz = u3qfu_shep
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(van, "axis", 'd', u3k(axe));
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// u3t_push(u3nc(c3__mean, dun));
u3t_push(u3nc(c3__mean, niz));
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return u3m_error("fish-loop");
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} else {
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u3_noun zoc = u3qdi_put(vit, sut);
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u3_noun fop = u3qfu_repo(van, sut);
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u3_noun pro = _fish_in(van, fop, axe, zoc);
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u3z(fop);
u3z(zoc);
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return pro;
}
}
}
}
}
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u3_noun
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_cqfu_fish(u3_noun van,
u3_noun sut,
u3_atom axe)
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{
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return _fish_in(van, sut, axe, u3_nul);
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}
/* boilerplate
*/
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u3_noun
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u3wfu_fish(u3_noun cor)
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{
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u3_noun sut, axe, van;
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if ( (c3n == u3r_mean(cor, u3x_sam, &axe, u3x_con, &van, 0)) ||
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(c3n == u3ud(axe)) ||
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(u3_none == (sut = u3r_at(u3x_sam, van))) )
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{
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return u3m_bail(c3__fail);
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} else {
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return _cqfu_fish(van, sut, axe);
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}
}
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u3_noun
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u3qfu_fish(u3_noun van,
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u3_noun sut,
u3_noun axe)
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{
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c3_m fun_m = c3__fish + !!u3r_at(u3qfu_van_vet, van);
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u3_noun pro = u3z_find_2(fun_m, sut, axe);
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if ( u3_none != pro ) {
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return pro;
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}
else {
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pro = _cqfu_fish(van, sut, axe);
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return u3z_save_2(fun_m, sut, axe, pro);
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}
}