1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* Copyright © 2016 Keith Packard <keithp@keithp.com>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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.
*/
#include "ao_lisp.h"
#include <stdio.h>
static FILE *ao_lisp_file;
static int newline = 1;
static char save_file[] = "lisp.image";
int
ao_lisp_os_save(void)
{
FILE *save = fopen(save_file, "w");
if (!save) {
perror(save_file);
return 0;
}
fwrite(ao_lisp_pool, 1, AO_LISP_POOL_TOTAL, save);
fclose(save);
return 1;
}
int
ao_lisp_os_restore_save(struct ao_lisp_os_save *save, int offset)
{
FILE *restore = fopen(save_file, "r");
size_t ret;
if (!restore) {
perror(save_file);
return 0;
}
fseek(restore, offset, SEEK_SET);
ret = fread(save, sizeof (struct ao_lisp_os_save), 1, restore);
fclose(restore);
if (ret != 1)
return 0;
return 1;
}
int
ao_lisp_os_restore(void)
{
FILE *restore = fopen(save_file, "r");
size_t ret;
if (!restore) {
perror(save_file);
return 0;
}
ret = fread(ao_lisp_pool, 1, AO_LISP_POOL_TOTAL, restore);
fclose(restore);
if (ret != AO_LISP_POOL_TOTAL)
return 0;
return 1;
}
int
ao_lisp_getc(void)
{
int c;
if (ao_lisp_file)
return getc(ao_lisp_file);
if (newline) {
printf("> ");
newline = 0;
}
c = getchar();
if (c == '\n')
newline = 1;
return c;
}
int
main (int argc, char **argv)
{
while (*++argv) {
ao_lisp_file = fopen(*argv, "r");
if (!ao_lisp_file) {
perror(*argv);
exit(1);
}
ao_lisp_read_eval_print();
fclose(ao_lisp_file);
ao_lisp_file = NULL;
}
ao_lisp_read_eval_print();
}
|
