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decapitate peek:ut

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pilfer-pandex 2019-05-17 15:25:26 -07:00
parent 7306e80da2
commit 6fdb739a38
1 changed files with 7 additions and 182 deletions
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189
pkg/urbit/jets/f/ut_peek.c
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@ -3,193 +3,18 @@
*/
#include "all.h"
/* logic
*/
static u3_noun
_cqfu_peek(u3_noun, u3_noun, u3_noun, u3_atom);
static u3_noun
_peek_in(u3_noun, u3_noun, u3_noun, u3_atom, u3_noun);
static u3_noun
_peek_fork(u3_noun van, u3_noun p_sut, u3_noun way, u3_noun axe, u3_noun gil)
{
if ( u3_nul == p_sut ) {
return u3_nul;
}
else {
return u3nc(_peek_in(van, u3h(p_sut), way, axe, gil),
_peek_fork(van, u3t(p_sut), way, axe, gil));
}
}
static u3_noun
_peek_in(u3_noun van,
u3_noun sut,
u3_noun way,
u3_atom axe,
u3_noun gil)
{
u3_noun p_sut, q_sut;
u3_noun pro;
if ( (c3n == u3du(sut)) ) switch ( sut ) {
default: return u3m_bail(c3__fail);
case c3__noun: {
return c3__noun;
}
case c3__void: {
return c3__void;
}
}
else switch ( u3h(sut) ) {
default: return u3m_bail(c3__fail);
case c3__atom: {
return c3__void;
}
case c3__cell: {
if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
return u3m_bail(c3__fail);
} else {
u3_atom tip = u3qc_cap(axe);
u3_atom tap = u3qc_mas(axe);
if ( 2 == tip ) {
pro = _cqfu_peek(van, p_sut, way, tap);
}
else {
pro = _cqfu_peek(van, q_sut, way, tap);
}
u3z(tap);
u3z(tip);
return pro;
}
}
case c3__core: {
u3_noun pq_sut, qq_sut, rq_sut;
u3_noun ppq_sut, qpq_sut, rpq_sut;
u3_noun prq_sut, qrq_sut;
if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ||
(c3n == u3r_trel(q_sut, &pq_sut, &qq_sut, &rq_sut)) ||
(c3n == u3r_trel(pq_sut, &ppq_sut, &qpq_sut, &rpq_sut)) ||
(c3n == u3r_cell(rq_sut, &prq_sut, &qrq_sut)) )
{
return u3m_bail(c3__fail);
} else {
u3_atom now = u3qc_cap(axe);
u3_atom lat = u3qc_mas(axe);
if ( 3 == now ) {
u3_noun pec = u3qfu_peel(van, sut, way, rpq_sut);
u3_noun sam = u3h(pec);
u3_noun con = u3t(pec);
u3_atom tow;
if ( 1 == lat ) {
tow = 1;
} else {
tow = u3qc_cap(lat);
}
if ( (c3y == c3a(sam, con)) ||
((c3y == sam) && (tow == 2)) ||
((c3y == con) && (tow == 3)) )
{
pro = _cqfu_peek(van, p_sut, way, lat);
}
else {
if ( way != c3__read ) {
return u3m_error("payload-block");
}
u3_noun typ;
{
u3_noun hed, tal;
if ( c3n == sam ) {
hed = c3__noun;
} else {
hed = _cqfu_peek(van, p_sut, way, 2);
}
if ( c3n == con ) {
tal = c3__noun;
} else {
tal = _cqfu_peek(van, p_sut, way, 3);
}
typ = u3qf_cell(hed, tal);
u3z(hed);
u3z(tal);
}
pro = _cqfu_peek(van, typ, way, lat);
u3z(typ);
}
u3z(pec);
u3z(tow);
}
else {
pro = c3__noun;
}
u3z(lat);
u3z(now);
return pro;
}
}
case c3__hint:
case c3__face: {
if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
return u3m_bail(c3__fail);
} else {
return _peek_in(van, q_sut, way, axe, gil);
}
}
case c3__fork: p_sut = u3t(sut);
{
u3_noun yed = u3qdi_tap(p_sut);
u3_noun ret = u3kf_fork(_peek_fork(van, yed, way, axe, gil));
u3z(yed);
return ret;
}
case c3__hold: {
if ( (c3y == u3qdi_has(gil, sut)) ) {
return c3__void;
}
else {
u3_noun zoc = u3qdi_put(gil, sut);
u3_noun fop = u3qfu_repo(van, sut);
u3_noun pro = _peek_in(van, fop, way, axe, zoc);
u3z(fop);
u3z(zoc);
return pro;
}
}
}
}
static u3_noun
_cqfu_peek(u3_noun van,
u3_noun sut,
u3_noun way,
u3_atom axe)
{
if ( 1 == axe ) {
return u3k(sut);
}
else return _peek_in(van, sut, way, axe, u3_nul);
u3_noun von = u3i_molt(u3k(van), u3x_sam, u3k(sut), 0);
u3_noun gat = u3j_cook("_cqfu_peek-peek", von, "peek");
gat = u3i_molt(gat, u3x_sam_2, u3k(way), u3x_sam_3, u3k(axe), 0);
return u3n_nock_on(gat, u3k(u3x_at(u3x_bat, gat)));
}
/* boilerplate
@ -208,7 +33,7 @@
{
return u3m_bail(c3__fail);
} else {
return _cqfu_peek(van, sut, way, axe);
return u3qfu_peek(van, sut, way, axe);
}
}