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72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
/* j/3/lsh.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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u3qc_lsh(u3_atom a,
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u3_atom b,
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u3_atom c)
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{
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if ( !_(u3a_is_cat(a)) || (a >= 32) ) {
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return u3m_bail(c3__fail);
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}
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else if ( !_(u3a_is_cat(b)) ) {
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return u3m_bail(c3__fail);
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}
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else {
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c3_g a_g = a;
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c3_w b_w = b;
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c3_w len_w = u3r_met(a_g, c);
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if ( 0 == len_w ) {
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return 0;
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}
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else if ( (b_w + len_w) < len_w ) {
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return u3m_bail(c3__exit);
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}
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else {
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c3_w* sal_w = u3a_slaq(a_g, (b_w + len_w));
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if ( 0 == sal_w ) {
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return u3m_bail(c3__fail);
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}
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u3r_chop(a_g, 0, len_w, b_w, sal_w, c);
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// return u3a_moot(sal_w);
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return u3a_malt(sal_w);
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}
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}
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}
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u3_noun
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u3wc_lsh(u3_noun cor)
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{
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u3_noun a, b, c;
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if ( (c3n == u3r_mean(cor, u3x_sam_2, &a,
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u3x_sam_6, &b,
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u3x_sam_7, &c, 0)) ||
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(c3n == u3ud(a)) ||
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(c3n == u3ud(b)) ||
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(c3n == u3ud(c)) )
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{
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return u3m_bail(c3__exit);
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} else {
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return u3qc_lsh(a, b, c);
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}
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}
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u3_noun
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u3kc_lsh(u3_noun a,
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u3_noun b,
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u3_noun c)
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{
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u3_noun d = u3qc_lsh(a, b, c);
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u3z(a); u3z(b); u3z(c);
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return d;
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}
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