mes/vector.c

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/* -*-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
make_vector (SCM n)
{
int k = VALUE (n);
g_cells[tmp_num].value = TVECTOR;
SCM v = alloc (k);
SCM x = make_cell (tmp_num, k, v);
for (int i=0; i<k; i++) g_cells[v+i] = g_cells[vector_entry (cell_unspecified)];
return x;
}
SCM
vector_length (SCM x)
{
assert (TYPE (x) == TVECTOR);
return MAKE_NUMBER (LENGTH (x));
}
SCM
vector_ref (SCM x, SCM i)
{
assert (TYPE (x) == TVECTOR);
assert (VALUE (i) < LENGTH (x));
SCM e = VECTOR (x) + VALUE (i);
if (TYPE (e) == TREF) e = g_cells[e].ref;
if (TYPE (e) == TCHAR) e = MAKE_CHAR (VALUE (e));
if (TYPE (e) == TNUMBER) e = MAKE_NUMBER (VALUE (e));
return e;
}
SCM
vector_entry (SCM x) {
if (TYPE (x) == TPAIR || TYPE (x) == TSPECIAL || TYPE (x) == TSTRING || TYPE (x) == TSYMBOL || TYPE (x) == TVECTOR) x = MAKE_REF (x);
return x;
}
SCM
vector_set_x (SCM x, SCM i, SCM e)
{
assert (TYPE (x) == TVECTOR);
assert (VALUE (i) < LENGTH (x));
g_cells[VECTOR (x)+g_cells[i].value] = g_cells[vector_entry (e)];
return cell_unspecified;
}
SCM
list_to_vector (SCM x)
{
VALUE (tmp_num) = VALUE (length (x));
SCM v = make_vector (tmp_num);
SCM p = VECTOR (v);
while (x != cell_nil)
{
g_cells[p++] = g_cells[vector_entry (car (x))];
x = cdr (x);
}
return v;
}
SCM
vector_to_list (SCM v)
{
SCM x = cell_nil;
for (int i = 0; i < LENGTH (v); i++) {
SCM e = VECTOR (v)+i;
if (TYPE (e) == TREF) e = g_cells[e].ref;
x = append2 (x, cons (e, cell_nil));
}
return x;
}