shrub/jets/e/mat.c

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/* j/3/mat.c
**
*/
#include "all.h"
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/* functions
*/
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u3_noun
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u3qe_mat(u3_atom a)
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{
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if ( 0 == a ) {
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return u3nc(1, 1);
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} else {
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u3_atom b = u3qc_met(0, a);
u3_atom c = u3qc_met(0, b);
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u3_atom u, v, w, x, y, z;
u3_atom p, q;
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u = u3qa_dec(c);
v = u3qa_add(c, c);
w = u3qc_bex(c);
x = u3qc_end(0, u, b);
y = u3qc_lsh(0, u, a);
z = u3qc_mix(x, y);
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p = u3qa_add(v, b);
q = u3qc_cat(0, w, z);
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u3z(u);
u3z(v);
u3z(w);
u3z(x);
u3z(y);
u3z(z);
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return u3nc(p, q);
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}
}
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u3_noun
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u3we_mat(u3_noun cor)
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{
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u3_noun a;
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if ( (u3_none == (a = u3r_at(u3x_sam, cor))) ) {
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return u3m_bail(c3__fail);
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} else {
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return u3qe_mat(a);
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}
}