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105 lines
2.1 KiB
C
105 lines
2.1 KiB
C
/* j/4/in_uni.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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static u3_noun
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_in_uni(u3_noun a, u3_noun b)
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{
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u3_noun n_a, l_a, r_a,
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n_b, l_b, r_b,
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neb, sub, naw, pro;
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if ( u3_nul == a ) {
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return u3k(b);
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}
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else if ( u3_nul == b ) {
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return u3k(a);
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}
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else if ( (c3n == u3r_trel(a, &n_a, &l_a, &r_a))
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|| (c3n == u3r_trel(b, &n_b, &l_b, &r_b)) )
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{
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return u3m_bail(c3__exit);
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}
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else if ( c3n == u3qc_vor(n_a, n_b) ) {
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if ( c3y == u3r_sing(n_a, n_b) ) {
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return u3nt(u3k(n_b), _in_uni(l_a, l_b), _in_uni(r_a, r_b));
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}
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else if ( c3y == u3qc_hor(n_a, n_b) ) {
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naw = u3nt(u3k(n_a), u3k(l_a), u3_nul);
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sub = _in_uni(naw, l_b);
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neb = u3nt(u3k(n_b), sub, u3k(r_b));
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pro = _in_uni(r_a, neb);
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u3z(naw); u3z(neb);
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return pro;
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}
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else {
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naw = u3nt(u3k(n_a), u3_nul, u3k(r_a));
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sub = _in_uni(naw, r_b);
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neb = u3nt(u3k(n_b), u3k(l_b), sub);
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pro = _in_uni(l_a, neb);
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u3z(naw); u3z(neb);
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return pro;
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}
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}
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else if ( c3y == u3r_sing(n_b, n_a) ) {
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return u3nt(u3k(n_b), _in_uni(l_a, l_b), _in_uni(r_a, r_b));
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}
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else if ( c3y == u3qc_hor(n_b, n_a) ) {
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neb = u3nt(u3k(n_b), u3k(l_b), u3_nul);
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sub = _in_uni(l_a, neb);
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naw = u3nt(u3k(n_a), sub, u3k(r_a));
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pro = _in_uni(naw, r_b);
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u3z(neb); u3z(naw);
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return pro;
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}
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else {
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neb = u3nt(u3k(n_b), u3_nul, u3k(r_b));
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sub = _in_uni(r_a, neb);
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naw = u3nt(u3k(n_a), u3k(l_a), sub);
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pro = _in_uni(naw, l_b);
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u3z(neb); u3z(naw);
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return pro;
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}
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}
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/* functions
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*/
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u3_noun
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u3kdi_uni(u3_noun a,
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u3_noun b)
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{
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u3_noun c = u3qdi_uni(a, b);
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u3z(a);
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u3z(b);
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return c;
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}
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u3_noun
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u3qdi_uni(u3_noun a,
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u3_noun b)
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{
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if ( c3y == u3r_sing(a, b) ) {
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return u3k(a);
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}
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else {
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return _in_uni(a, b);
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}
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}
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u3_noun
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u3wdi_uni(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 u3qdi_uni(a, b);
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}
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}
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