2015-07-02 08:21:38 +03:00
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/* jets/d/by_bif.c
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**
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*/
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#include "all.h"
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/* internal functions
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*/
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2017-09-28 03:40:12 +03:00
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static
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2015-08-28 16:26:00 +03:00
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u3_noun _b_bif_putroot(u3_noun a,
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u3_noun b)
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2015-07-02 08:21:38 +03:00
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{
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if ( u3_nul == a) {
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return u3nt(u3k(b), u3_nul, u3_nul);
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}
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else {
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u3_noun n_a, l_a, r_a;
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u3_noun p_n_a, q_n_a;
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u3_noun p_b, q_b;
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if ( (c3n == u3r_trel(a, &n_a, &l_a, &r_a))
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|| (c3n == u3r_cell(b, &p_b, &q_b))
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|| (c3n == u3r_cell(n_a, &p_n_a, &q_n_a)) ) {
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return u3m_bail(c3__exit);
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}
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else if ( c3y == u3r_sing(p_b, p_n_a) ) {
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return u3nt(u3k(b), u3k(l_a), u3k(r_a));
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}
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else {
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u3_noun c, n_c, l_c, r_c;
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u3_noun d;
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if ( c3y == u3qc_gor(p_b, p_n_a) ) {
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c = _b_bif_putroot(l_a, b);
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u3r_trel(c, &n_c, &l_c, &r_c);
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d = u3nt(u3k(n_c),
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u3k(l_c),
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u3nt(u3k(n_a), u3k(r_c), u3k(r_a))
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);
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u3z(c);
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return d;
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} else {
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c = _b_bif_putroot(r_a, b);
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u3r_trel(c, &n_c, &l_c, &r_c);
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d = u3nt(u3k(n_c),
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u3nt(u3k(n_a), u3k(l_a), u3k(l_c)),
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u3k(r_c)
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);
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u3z(c);
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return d;
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}
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}
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}
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}
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/* functions
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*/
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u3_noun u3wdb_bif(u3_noun cor)
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{
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u3_noun a, b;
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if ( c3n == u3r_mean(cor, u3x_sam, &b, u3x_con_sam, &a, 0) ) {
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return u3m_bail(c3__exit);
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} else {
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return u3qdb_bif(a, b);
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}
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}
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2015-08-28 16:26:00 +03:00
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u3_noun u3qdb_bif(u3_noun a,
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u3_noun b)
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2015-07-02 08:21:38 +03:00
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{
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u3_noun c, n_c, l_c, r_c;
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u3_noun d;
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c = _b_bif_putroot(a, b);
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u3r_trel(c, &n_c, &l_c, &r_c);
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d = u3nc(u3k(l_c), u3k(r_c));
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u3z(c);
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return d;
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}
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/*
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u3_weak u3kdi_bif(u3_noun a, u3_noun b);
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*/
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