Merge branch 'master' of ssh://git.gag.com/scm/git/fw/altos
[fw/altos] / src / scheme / ao_scheme_rep.c
1 /*
2  * Copyright © 2016 Keith Packard <keithp@keithp.com>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation, either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * General Public License for more details.
13  */
14
15 #include "ao_scheme.h"
16
17 ao_poly
18 ao_scheme_read_eval_print(void)
19 {
20         ao_poly in, out = AO_SCHEME_NIL;
21         for(;;) {
22                 in = ao_scheme_read();
23                 if (in == _ao_scheme_atom_eof)
24                         break;
25                 out = ao_scheme_eval(in);
26                 if (ao_scheme_exception) {
27                         if (ao_scheme_exception & AO_SCHEME_EXIT)
28                                 break;
29                         ao_scheme_exception = 0;
30                 } else {
31                         ao_scheme_poly_write(out);
32                         putchar ('\n');
33                 }
34         }
35         return out;
36 }