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109 lines
2.2 KiB
C
109 lines
2.2 KiB
C
/* j/3/po.c
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**
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** This file is in the public domain.
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*/
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#include "all.h"
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// good old linear search
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//
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static u3_noun
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_po_find(u3_noun buf, u3_noun a)
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{
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if ( u3_ne(u3_ca_is_cat(a)) ) {
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return u3_nul;
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}
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else {
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c3_w i_w;
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c3_w a_w = a;
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for ( i_w = 0; i_w < 256; i_w++ ) {
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c3_y byt_y[3];
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c3_w but_w;
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u3_cr_bytes((i_w * 3), 3, byt_y, buf);
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but_w = (byt_y[0] | (byt_y[1] << 8) | (byt_y[2] << 16));
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if ( but_w == a_w ) {
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return u3nc(u3_nul, i_w);
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}
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}
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return u3_nul;
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}
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}
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u3_noun
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u3_cwcp_ins(
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u3_noun cor)
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{
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u3_noun x, a, buf;
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if ( (u3_no == u3_cr_mean(cor, u3_cv_sam, &a, u3_cv_con_sam, &x, 0)) ||
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(u3_no == u3du(x)) ||
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(u3_no == u3ud(buf = u3h(x))) ||
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(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 _po_find(buf, a);
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}
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}
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u3_noun
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u3_cwcp_ind(
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u3_noun cor)
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{
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u3_noun x, a, buf;
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if ( (u3_no == u3_cr_mean(cor, u3_cv_sam, &a, u3_cv_con_sam, &x, 0)) ||
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(u3_no == u3du(x)) ||
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(u3_no == u3ud(buf = u3t(x))) ||
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(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 _po_find(buf, a);
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}
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}
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u3_noun
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u3_cwcp_tos(
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u3_noun cor)
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{
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u3_noun x, a, buf;
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if ( (u3_no == u3_cr_mean(cor, u3_cv_sam, &a, u3_cv_con_sam, &x, 0)) ||
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(u3_no == u3du(x)) ||
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(u3_no == u3ud(buf = u3h(x))) ||
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(u3_no == u3ud(a)) ||
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(a >= 256) )
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{
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return u3_cm_bail(c3__exit);
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}
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else {
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c3_y byt_y[3];
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u3_cr_bytes((a * 3), 3, byt_y, buf);
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return (byt_y[0] | (byt_y[1] << 8) | (byt_y[2] << 16));
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}
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}
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u3_noun
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u3_cwcp_tod(
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u3_noun cor)
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{
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u3_noun x, a, buf;
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if ( (u3_no == u3_cr_mean(cor, u3_cv_sam, &a, u3_cv_con_sam, &x, 0)) ||
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(u3_no == u3du(x)) ||
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(u3_no == u3ud(buf = u3t(x))) ||
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(u3_no == u3ud(a)) ||
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(a >= 256) )
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{
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return u3_cm_bail(c3__exit);
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} else {
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c3_y byt_y[3];
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u3_cr_bytes((a * 3), 3, byt_y, buf);
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return (byt_y[0] | (byt_y[1] << 8) | (byt_y[2] << 16));
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}
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}
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