101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
|
|
* Mes --- Maxwell Equations of Software
|
|
* Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
|
|
*
|
|
* This file is part of Mes.
|
|
*
|
|
* Mes is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* Mes is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Mes. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
scm *caar (scm *x) {return car (car (x));}
|
|
scm *cadr (scm *x) {return car (cdr (x));}
|
|
scm *cdar (scm *x) {return cdr (car (x));}
|
|
scm *cddr (scm *x) {return cdr (cdr (x));}
|
|
scm *caaar (scm *x) {return car (car (car (x)));}
|
|
scm *caadr (scm *x) {return car (car (cdr (x)));}
|
|
scm *caddr (scm *x) {return car (cdr (cdr (x)));}
|
|
scm *cdadr (scm *x) {return cdr (car (cdr (x)));}
|
|
scm *cadar (scm *x) {return car (cdr (car (x)));}
|
|
scm *cddar (scm *x) {return cdr (cdr (car (x)));}
|
|
scm *cdddr (scm *x) {return cdr (cdr (cdr (x)));}
|
|
|
|
scm *
|
|
length (scm *x)
|
|
{
|
|
int n = 0;
|
|
while (x != &scm_nil)
|
|
{
|
|
n++;
|
|
x = cdr (x);
|
|
}
|
|
return make_number (n);
|
|
}
|
|
|
|
scm *
|
|
last_pair (scm *x)
|
|
{
|
|
while (x != &scm_nil && cdr (x) != &scm_nil)
|
|
x = cdr (x);
|
|
return x;
|
|
}
|
|
|
|
scm *
|
|
list (scm *x) ///((args . n))
|
|
{
|
|
return x;
|
|
}
|
|
|
|
scm *
|
|
list_ref (scm *x, scm *k)
|
|
{
|
|
assert (x->type == PAIR);
|
|
assert (k->type == NUMBER);
|
|
int n = k->value;
|
|
while (n-- && x->cdr != &scm_nil) x = x->cdr;
|
|
return x != &scm_nil ? x->car : &scm_undefined;
|
|
}
|
|
|
|
scm *
|
|
vector_to_list (scm *v)
|
|
{
|
|
scm *x = &scm_nil;
|
|
for (int i = 0; i < v->length; i++) {
|
|
scm *e = &v->vector[i];
|
|
if (e->type == REF) e = e->ref;
|
|
x = append2 (x, cons (e, &scm_nil));
|
|
}
|
|
return x;
|
|
}
|
|
|
|
scm *
|
|
integer_to_char (scm *x)
|
|
{
|
|
assert (x->type == NUMBER);
|
|
return make_char (x->value);
|
|
}
|
|
|
|
scm *
|
|
char_to_integer (scm *x)
|
|
{
|
|
assert (x->type == CHAR);
|
|
return make_number (x->value);
|
|
}
|
|
|
|
scm *
|
|
builtin_exit (scm *x)
|
|
{
|
|
assert (x->type == NUMBER);
|
|
exit (x->value);
|
|
}
|