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72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
/* j/3/cut.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_cut(u3_atom a,
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u3_atom b,
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u3_atom c,
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u3_atom d)
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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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if ( !_(u3a_is_cat(b)) ) {
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return 0;
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}
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if ( !_(u3a_is_cat(c)) ) {
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c = 0x7fffffff;
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}
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{
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c3_g a_g = a;
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c3_w b_w = b;
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c3_w c_w = c;
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c3_w len_w = u3r_met(a_g, d);
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if ( (0 == c_w) || (b_w >= len_w) ) {
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return 0;
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}
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if ( b_w + c_w > len_w ) {
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c_w = (len_w - b_w);
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}
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if ( (b_w == 0) && (c_w == len_w) ) {
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return u3k(d);
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}
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else {
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c3_w* sal_w = u3a_slaq(a_g, c_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, b_w, c_w, 0, sal_w, d);
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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_cut(u3_noun cor)
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{
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u3_noun a, b, c, d;
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if ( (c3n == u3r_mean(cor, u3x_sam_2, &a,
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u3x_sam_12, &b,
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u3x_sam_13, &c,
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u3x_sam_7, &d, 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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(c3n == u3ud(d)) )
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{
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return u3m_bail(c3__exit);
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} else {
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return u3qc_cut(a, b, c, d);
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}
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}
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