88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/* -*-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 caar (SCM x) {return car (car (x));}
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SCM cadr (SCM x) {return car (cdr (x));}
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SCM cdar (SCM x) {return cdr (car (x));}
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SCM cddr (SCM x) {return cdr (cdr (x));}
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SCM caaar (SCM x) {return car (car (car (x)));}
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SCM caadr (SCM x) {return car (car (cdr (x)));}
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SCM caddr (SCM x) {return car (cdr (cdr (x)));}
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SCM cdadr (SCM x) {return cdr (car (cdr (x)));}
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SCM cadar (SCM x) {return car (cdr (car (x)));}
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SCM cddar (SCM x) {return cdr (cdr (car (x)));}
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SCM cdddr (SCM x) {return cdr (cdr (cdr (x)));}
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SCM cadddr (SCM x) {return car (cdr (cdr (cdr (x))));}
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SCM
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length (SCM x)
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{
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int n = 0;
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while (x != cell_nil)
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{
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n++;
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x = cdr (x);
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}
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return make_number (n);
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}
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SCM
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last_pair (SCM x)
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{
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while (x != cell_nil && cdr (x) != cell_nil)
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x = cdr (x);
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return x;
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}
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SCM
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list (SCM x) ///((arity . n))
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{
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return x;
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}
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SCM
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list_ref (SCM x, SCM k)
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{
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assert (TYPE (x) == PAIR);
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assert (TYPE (k) == NUMBER);
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int n = VALUE (k);
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while (n-- && CDR (x) != cell_nil) x = CDR (x);
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return x != cell_nil ? car (x) : cell_undefined;
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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) == REF) 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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SCM
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builtin_exit (SCM x)
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{
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assert (TYPE (x) == NUMBER);
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exit (VALUE (x));
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}
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