/tags/rel-1-3-29/SWIG/Lib/guile/interpreter.i

 1/* -----------------------------------------------------------------------------
 2 * See the LICENSE file for information on copyright, usage and redistribution
 3 * of SWIG, and the README file for authors - http://www.swig.org/release.html.
 4 *
 5 * interpreter.i
 6 *
 7 * SWIG file for a simple Guile interpreter
 8 * ----------------------------------------------------------------------------- */
 9
10%{
11
12#include <stdio.h>
13GSCM_status guile_init();
14
15int main(int argc, char **argv) {
16  GSCM_status status;
17  GSCM_top_level toplev;
18  char *eval_answer;
19  char input_str[16384];
20  int done;
21
22  /* start a scheme interpreter */
23  status = gscm_run_scm(argc, argv, 0, stdout, stderr, guile_init, 0, "#t");
24  if (status != GSCM_OK) {
25    fputs(gscm_error_msg(status), stderr);
26    fputc('\n', stderr);
27    printf("Error in startup.\n");
28    exit(1);
29  }
30
31  /* create the top level environment */
32  status = gscm_create_top_level(&toplev);
33  if (status != GSCM_OK) {
34    fputs(gscm_error_msg(status), stderr);
35    fputc('\n', stderr);
36    exit(1);
37  }
38
39  /* now sit in a scheme eval loop: I input the expressions, have guile
40   * evaluate them, and then get another expression.
41   */
42  done = 0;
43  fprintf(stdout,"Guile > ");
44  while (!done) {
45    if (fgets(input_str,16384,stdin) == NULL) {
46      exit(1);
47    } else {
48      if (strncmp(input_str,"quit",4) == 0) exit(1);
49      status = gscm_eval_str(&eval_answer, toplev, input_str);
50      fprintf(stdout,"%s\n", eval_answer);
51      fprintf(stdout,"Guile > ");
52    }
53  }
54
55  /* now clean up and quit */
56  gscm_destroy_top_level(toplev);
57}
58
59%}
60
61
62