91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
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/* -*-comment-start: "//";comment-end:""-*-
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* Mes --- Maxwell Equations of Software
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* Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of Mes.
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*
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* Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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SCM
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make_vector (SCM n)
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{
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int k = VALUE (n);
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g_cells[tmp_num].value = TVECTOR;
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SCM v = alloc (k);
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SCM x = make_cell (tmp_num, k, v);
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for (int i=0; i<k; i++) g_cells[v+i] = g_cells[vector_entry (cell_unspecified)];
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return x;
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}
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SCM
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vector_length (SCM x)
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{
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assert (TYPE (x) == TVECTOR);
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return MAKE_NUMBER (LENGTH (x));
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}
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SCM
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vector_ref (SCM x, SCM i)
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{
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assert (TYPE (x) == TVECTOR);
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assert (VALUE (i) < LENGTH (x));
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SCM e = VECTOR (x) + VALUE (i);
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if (TYPE (e) == TREF) e = g_cells[e].ref;
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if (TYPE (e) == TCHAR) e = MAKE_CHAR (VALUE (e));
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if (TYPE (e) == TNUMBER) e = MAKE_NUMBER (VALUE (e));
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return e;
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}
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SCM
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vector_entry (SCM x) {
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if (TYPE (x) == TPAIR || TYPE (x) == TSPECIAL || TYPE (x) == TSTRING || TYPE (x) == TSYMBOL || TYPE (x) == TVECTOR) x = MAKE_REF (x);
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return x;
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}
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SCM
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vector_set_x (SCM x, SCM i, SCM e)
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{
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assert (TYPE (x) == TVECTOR);
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assert (VALUE (i) < LENGTH (x));
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g_cells[VECTOR (x)+g_cells[i].value] = g_cells[vector_entry (e)];
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return cell_unspecified;
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}
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SCM
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list_to_vector (SCM x)
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{
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VALUE (tmp_num) = VALUE (length (x));
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SCM v = make_vector (tmp_num);
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SCM p = VECTOR (v);
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while (x != cell_nil)
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{
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g_cells[p++] = g_cells[vector_entry (car (x))];
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x = cdr (x);
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}
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return v;
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}
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SCM
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vector_to_list (SCM v)
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{
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SCM x = cell_nil;
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for (int i = 0; i < LENGTH (v); i++) {
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SCM e = VECTOR (v)+i;
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if (TYPE (e) == TREF) e = g_cells[e].ref;
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x = append2 (x, cons (e, cell_nil));
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}
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return x;
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}
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