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60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
/* j/6/ut_repo.c
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**
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*/
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#include "all.h"
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/* logic
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*/
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u3_noun
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u3qfu_repo(u3_noun van,
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u3_noun sut)
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{
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u3_noun p_sut, q_sut;
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if ( c3n == u3du(sut) ) switch ( sut ) {
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default: return u3k(sut);
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case c3__noun:
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return u3nt(c3__fork,
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u3nt(c3__atom, u3_blip, u3_nul),
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u3nt(c3__cell, c3__noun, c3__noun));
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}
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else switch ( u3h(sut) ) {
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default: {
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return u3m_error("repo-flat");
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}
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case c3__core: {
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if ( c3n == u3r_cell(u3t(sut), &p_sut, &q_sut) ) {
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return u3m_bail(c3__fail);
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} else {
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return u3nt(c3__cell, c3__noun, u3k(p_sut));
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}
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}
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case c3__face: {
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if ( c3n == u3r_cell(u3t(sut), &p_sut, &q_sut)) {
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return u3m_bail(c3__fail);
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} else {
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return u3k(q_sut);
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}
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}
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case c3__hold: {
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p_sut = u3t(sut);
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return u3qfu_rest(van, sut, p_sut);
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}
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}
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}
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u3_noun
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u3wfu_repo(u3_noun cor)
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{
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u3_noun sut;
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if ( u3_none == (sut = u3r_at(u3x_sam, cor)) ) {
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return u3m_bail(c3__fail);
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} else {
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return u3qfu_repo(cor, sut);
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}
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}
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