mirror of
https://github.com/ilyakooo0/urbit.git
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73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/* j/6/comb.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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/* functions
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*/
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u3_noun
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u3qf_comb(
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u3_noun mal,
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u3_noun buz)
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{
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if ( (u3_none == mal) || (u3_none == buz) ) {
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return u3_none;
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}
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else {
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u3_noun p_mal, q_mal, p_buz, q_buz, pp_buz, pq_buz;
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if ( (c3y == u3r_p(mal, 0, &p_mal)) && (0 != p_mal) ) {
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if ( (c3y == u3r_p(buz, 0, &p_buz)) && (0 != p_buz) ) {
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return u3nc(
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0,
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u3qc_peg(p_mal, p_buz));
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}
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else if ( c3y == u3r_pq(buz, 2, &p_buz, &q_buz) &&
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c3y == u3r_p(p_buz, 0, &pp_buz) &&
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c3y == u3r_p(q_buz, 0, &pq_buz) )
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{
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return u3nt
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(2,
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u3nc(0,
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u3qc_peg(p_mal, pp_buz)),
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u3nc(0,
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u3qc_peg(p_mal, pq_buz)));
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}
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else return u3nt(7, u3k(mal),
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u3k(buz));
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}
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#if 1
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else if ( (c3y == u3r_bush(mal, &p_mal, &q_mal)) &&
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(c3y == u3du(p_mal)) &&
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(c3y == u3du(q_mal)) &&
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(0 == u3h(q_mal)) &&
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(1 == u3t(q_mal)) )
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{
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return u3nt(8, u3k(p_mal),
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u3k(buz));
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}
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#endif
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else if ( (c3y == u3r_p(buz, 0, &p_buz)) &&
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(c3y == u3r_sing(1, p_buz)) )
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{
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return u3k(mal);
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}
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else return u3nt(7, u3k(mal),
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u3k(buz));
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}
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}
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u3_noun
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u3wf_comb(
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u3_noun cor)
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{
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u3_noun mal, buz;
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if ( c3n == u3r_mean(cor, u3x_sam_2, &mal, u3x_sam_3, &buz, 0) ) {
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return u3_none;
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} else {
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return u3qf_comb(mal, buz);
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}
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}
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