shrub/j/2/slag.c

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/* j/2/slag.c
**
** This file is in the public domain.
*/
#include "all.h"
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/* functions
*/
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u3_noun
u3_cqb_slag(u3_atom a, u3_noun b)
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{
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if ( u3_ne(u3_co_is_cat(a)) ) {
return u3_cm_bail(c3__fail);
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}
else {
c3_w len_w = a;
while ( len_w ) {
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if ( u3_no == u3du(b) ) {
return u3_nul;
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}
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b = u3t(b);
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len_w--;
}
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return u3k(b);
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}
}
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u3_noun
u3_cwb_slag(u3_noun cor)
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{
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u3_noun a, b;
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if ( (u3_no == u3_cr_mean(cor, u3_cv_sam_2, &a, u3_cv_sam_3, &b, 0)) ||
(u3_no == u3ud(a)) )
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{
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return u3_cm_bail(c3__exit);
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} else {
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return u3_cqb_slag(a, b);
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}
}