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
|
/* -----------------------------------------------------------------------------
* interpreter.i
*
* SWIG file for a simple Guile interpreter
* ----------------------------------------------------------------------------- */
%{
#include <stdio.h>
GSCM_status guile_init();
int main(int argc, char **argv) {
GSCM_status status;
GSCM_top_level toplev;
char *eval_answer;
char input_str[16384];
int done;
/* start a scheme interpreter */
status = gscm_run_scm(argc, argv, 0, stdout, stderr, guile_init, 0, "#t");
if (status != GSCM_OK) {
fputs(gscm_error_msg(status), stderr);
fputc('\n', stderr);
printf("Error in startup.\n");
exit(1);
}
/* create the top level environment */
status = gscm_create_top_level(&toplev);
if (status != GSCM_OK) {
fputs(gscm_error_msg(status), stderr);
fputc('\n', stderr);
exit(1);
}
/* now sit in a scheme eval loop: I input the expressions, have guile
* evaluate them, and then get another expression.
*/
done = 0;
fprintf(stdout,"Guile > ");
while (!done) {
if (fgets(input_str,16384,stdin) == NULL) {
exit(1);
} else {
if (strncmp(input_str,"quit",4) == 0) exit(1);
status = gscm_eval_str(&eval_answer, toplev, input_str);
fprintf(stdout,"%s\n", eval_answer);
fprintf(stdout,"Guile > ");
}
}
/* now clean up and quit */
gscm_destroy_top_level(toplev);
}
%}
|
