92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2018,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU 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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* GNU 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "mes/lib.h"
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#include "mes/mes.h"
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struct scm *
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make_struct (struct scm *type, struct scm *fields, struct scm *printer)
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{
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long size = 2 + length__ (fields);
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struct scm *x = alloc (1);
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struct scm *v = alloc (size);
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x->type = TSTRUCT;
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x->length = size;
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x->structure = v;
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copy_cell (v, vector_entry (type));
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copy_cell (cell_ref (v, 1), vector_entry (printer));
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long i;
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struct scm *e;
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for (i = 2; i < size; i = i + 1)
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{
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e = cell_unspecified;
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if (fields != cell_nil)
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{
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e = fields->car;
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fields = fields->cdr;
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}
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copy_cell (cell_ref (v, i), vector_entry (e));
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}
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return x;
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}
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struct scm *
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struct_length (struct scm *x)
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{
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assert_msg (x->type == TSTRUCT, "x->type == TSTRUCT");
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return make_number (x->length);
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}
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struct scm *
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struct_ref_ (struct scm *x, long i)
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{
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assert_msg (x->type == TSTRUCT, "x->type == TSTRUCT");
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assert_msg (i < x->length, "i < x->length");
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struct scm *e = cell_ref (x->structure, i);
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if (e->type == TREF)
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e = e->ref;
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if (e->type == TCHAR)
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e = make_char (e->value);
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if (e->type == TNUMBER)
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e = make_number (e->value);
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return e;
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}
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struct scm *
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struct_set_x_ (struct scm *x, long i, struct scm *e)
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{
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assert_msg (x->type == TSTRUCT, "x->type == TSTRUCT");
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assert_msg (i < x->length, "i < x->length");
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copy_cell (cell_ref (x->structure, i), vector_entry (e));
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return cell_unspecified;
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}
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struct scm *
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struct_ref (struct scm *x, struct scm *i)
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{
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return struct_ref_ (x, i->value);
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}
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struct scm *
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struct_set_x (struct scm *x, struct scm *i, struct scm *e)
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{
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return struct_set_x_ (x, i->value, e);
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}
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