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136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
/* j/3/jam.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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#include "../pit.h"
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/* functions
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*/
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static u2_noun
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_jam_in(u2_ch_root* har_u, u2_atom, u2_atom, u2_noun);
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static u2_noun // produce
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_jam_in_pair(u2_ch_root* har_u,
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u2_atom h_a, // retain
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u2_atom t_a, // retain
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u2_atom b, // retain
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u2_noun l) // retain
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{
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u2_noun w = u2nc(u2nc(2, 1), u2k(l));
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u2_noun x = u2_cqa_add(2, b);
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u2_noun d = _jam_in(har_u, h_a, x, w);
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u2_noun p_d, q_d, r_d;
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u2_noun r;
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u2_cr_trel(d, &p_d, &q_d, &r_d);
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{
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u2_noun y = u2_cqa_add(x, p_d);
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u2_noun e = _jam_in(har_u, t_a, y, q_d);
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u2_noun p_e, q_e, r_e;
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u2_cr_trel(e, &p_e, &q_e, &r_e);
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{
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u2_noun z = u2_cqa_add(p_d, p_e);
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r = u2nt(u2_cqa_add(2, z), u2k(q_e), 0);
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u2z(z);
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}
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u2z(e);
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u2z(y);
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}
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u2z(d);
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u2z(x);
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u2z(w);
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return r;
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}
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static u2_noun // produce
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_jam_in_flat(u2_ch_root* har_u,
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u2_atom a, // retain
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u2_noun l) // retain
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{
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u2_noun d = u2_cqe_mat(a);
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u2_noun x = u2_cqa_add(1, u2h(d));
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u2_noun y = u2nt
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(u2k(x), u2nc(u2nc(x, u2_cqc_lsh(0, 1, u2t(d))), u2k(l)), 0);
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u2z(d);
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return y;
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}
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static u2_noun // produce
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_jam_in_ptr(u2_ch_root* har_u,
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u2_atom u_c, // retain
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u2_noun l) // retain
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{
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u2_noun d = u2_cqe_mat(u_c);
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u2_atom x = u2_cqc_lsh(0, 2, u2t(d));
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u2_atom y = u2_cqa_add(2, u2h(d));
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u2_noun z = u2nt
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(u2k(y), u2nc(u2nc(y, u2_cqc_mix(3, x)), u2k(l)), 0);
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u2z(d);
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u2z(x);
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return z;
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}
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static u2_noun // produce
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_jam_in(u2_ch_root* har_u,
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u2_noun a, // retain
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u2_atom b, // retain
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u2_noun l) // retain
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{
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u2_noun c = u2_ch_get(har_u, u2k(a));
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u2_noun x;
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if ( u2_none == c ) {
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u2_ch_put(har_u, u2k(a), u2k(b));
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if ( u2_yes == u2ud(a) ) {
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x = _jam_in_flat(har_u, a, l);
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} else {
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x = _jam_in_pair(har_u, u2h(a), u2t(a), b, l);
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}
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}
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else {
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if ( u2_yes == u2ud(a) && u2_cr_met(0, a) <= u2_cr_met(0, c) ) {
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x = _jam_in_flat(har_u, a, l);
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}
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else {
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x = _jam_in_ptr(har_u, c, l);
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}
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}
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return x;
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}
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u2_noun // transfer
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u2_cqe_jam(u2_atom a) // retain
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{
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u2_ch_root* har_u = u2_ch_new();
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u2_noun x = _jam_in(har_u, a, 0, u2_nul);
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u2_noun q = u2_cqb_flop(u2h(u2t(x)));
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u2_noun r = u2_cqc_can(0, q);
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u2z(x);
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u2z(q);
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u2_ch_free(har_u);
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return r;
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}
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u2_noun // transfer
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u2_cwe_jam(u2_noun cor) // retain
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{
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u2_noun a;
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if ( (u2_none == (a = u2_cr_at(u2_cv_sam, cor))) ) {
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return u2_cm_bail(c3__fail);
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} else {
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return u2_cqe_jam(a);
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}
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}
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