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
|
/*
* interpreter.c: test interpreter
*
* Copyright (c) 2017, Přemysl Janouch <p.janouch@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "ell.c"
int
main (int argc, char *argv[]) {
FILE *fp = stdin;
if (argc > 1 && !(fp = fopen (argv[1], "rb"))) {
fprintf (stderr, "%s: %s\n", argv[1], strerror (errno));
return 1;
}
int c;
struct buffer buf = BUFFER_INITIALIZER;
while ((c = fgetc (fp)) != EOF)
buffer_append_c (&buf, c);
buffer_append_c (&buf, 0);
fclose (fp);
struct parser parser;
parser_init (&parser, buf.s, buf.len - 1);
const char *e = NULL;
struct item *program = parser_run (&parser, &e);
free (buf.s);
if (e) {
printf ("%s: %s\n", "parse error", e);
return 1;
}
parser_free (&parser);
struct context ctx;
context_init (&ctx);
if (!init_runtime_library (&ctx))
printf ("%s\n", "runtime library initialization failed");
// In this one place we optimistically expect allocation to succeed
struct item *args = NULL, **tail = &args;
for (int i = 2; i < argc; i++)
tail = &(*tail = new_string (argv[i], strlen (argv[i])))->next;
struct item *result = NULL;
(void) execute_block (&ctx, program, args, &result);
item_free_list (result);
item_free_list (program);
const char *failure = ctx.error;
if (ctx.memory_failure)
failure = "memory allocation failure";
if (failure)
printf ("%s: %s\n", "runtime error", failure);
context_free (&ctx);
return 0;
}
|
