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94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
/* j/6/ut_park.c
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**
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** This file is in the public domain.
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*/
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#include "all.h"
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/* logic
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*/
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u2_bean
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_cqfu_park(
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u2_noun van,
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u2_noun sut,
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u2_noun way,
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u2_atom axe)
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{
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if ( u2_no == u2du(sut) || c3__core != u2h(sut) ) {
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return u2_cm_bail(c3__fail);
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}
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// else if ( u2_no == u2_cj_hook(u2k(van), "vet") ) {
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else if ( u2_no == u2_cr_at(u2_cqfu_van_vet, van) ) {
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return u2_yes;
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}
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else {
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u2_noun p_sut, q_sut, pq_sut;
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u2_cx_cell(u2t(sut), &p_sut, &q_sut);
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u2_cx_cell(q_sut, &pq_sut, 0);
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if ( c3__both == way ) {
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if ( c3__gold == pq_sut ) {
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return u2_yes;
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} else return u2_no;
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}
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if ( c3__read == way ) {
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switch ( pq_sut ) {
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default: return u2_cm_bail(c3__fail);
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case c3__gold: return u2_yes;
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case c3__lead: return u2_no;
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case c3__iron: return u2_no;
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case c3__zinc: return
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u2_and(u2_not(u2_cr_sing(1, axe)),
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u2_cr_sing(2, u2_cqc_cap(axe)));
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}
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}
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else if ( c3__rite == way ) {
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switch ( pq_sut ) {
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default: return u2_cm_bail(c3__fail);
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case c3__gold: return u2_yes;
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case c3__lead: return u2_no;
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case c3__iron: return
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u2_and(u2_not(u2_cr_sing(1, axe)),
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u2_cr_sing(2, u2_cqc_cap(axe)));
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case c3__zinc: return u2_no;
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}
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}
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else if ( c3__free == way ) { return u2_yes; }
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else return u2_cm_bail(c3__fail);
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}
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}
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/* boilerplate
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*/
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u2_noun
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u2_cwfu_park(
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u2_noun cor)
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{
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u2_noun sut, way, axe, van;
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if ( (u2_no == u2_cr_mean(cor, u2_cv_sam_2, &way,
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u2_cv_sam_3, &axe,
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u2_cv_con, &van,
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0)) ||
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(u2_no == u2ud(axe)) ||
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(u2_none == (sut = u2_cr_at(u2_cv_sam, van))) )
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{
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return u2_cm_bail(c3__fail);
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} else {
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return _cqfu_park(van, sut, way, axe);
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}
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}
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u2_noun
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u2_cqfu_park(u2_noun van,
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u2_noun sut,
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u2_noun way,
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u2_noun axe)
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{
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return _cqfu_park(van, sut, way, axe);
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}
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