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53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
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/* j/6/cons.c
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**
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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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u3qz_cons(u3_noun vur,
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u3_noun sed)
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{
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u3_noun p_vur, p_sed;
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if ( c3y == u3r_p(vur, 1, &p_vur) &&
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c3y == u3r_p(sed, 1, &p_sed) ) {
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return u3nt(1,
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u3k(p_vur),
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u3k(p_sed));
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}
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else if ( c3y == u3r_p(vur, 0, &p_vur) &&
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c3y == u3r_p(sed, 0, &p_sed) &&
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!(c3y == u3r_sing(1, p_vur)) &&
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!(c3y == u3r_sing(p_vur, p_sed)) &&
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(0 == u3r_nord(p_vur, p_sed)) )
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{
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u3_atom fub = u3qa_div(p_vur, 2);
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u3_atom nof = u3qa_div(p_sed, 2);
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if ( c3y == u3r_sing(fub, nof) ) {
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u3z(nof);
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return u3nc(0, fub);
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}
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else {
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u3z(fub);
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u3z(nof);
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}
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}
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return u3nc(u3k(vur), u3k(sed));
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}
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u3_noun
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u3wz_cons(u3_noun cor)
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{
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u3_noun vur, sed;
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if ( c3n == u3r_mean(cor, u3x_sam_2, &vur, u3x_sam_3, &sed, 0) ) {
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return u3m_bail(c3__fail);
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} else {
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return u3qz_cons(vur, sed);
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}
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}
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