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#include <stdio.h>
#include <libguile.h>
SCM default_bindings() {
SCM bindings = scm_c_public_ref("ice-9 sandbox", "all-pure-and-impure-bindings");
bindings = scm_cons(
scm_list_2(
scm_list_2(scm_from_utf8_symbol("srfi"), scm_from_utf8_symbol("srfi-9")),
scm_from_utf8_symbol("define-record-type")),
bindings
);
bindings = scm_cons(
scm_list_2(
scm_list_2(scm_from_utf8_symbol("srfi"), scm_from_utf8_symbol("srfi-1")),
scm_from_utf8_symbol("drop")),
bindings
);
bindings = scm_cons(
scm_list_2(
scm_list_1(scm_from_utf8_symbol("guile")),
scm_from_utf8_symbol("seed->random-state")),
bindings
);
bindings = scm_cons(
scm_list_2(
scm_list_1(scm_from_utf8_symbol("guile")),
scm_from_utf8_symbol("random")),
bindings
);
bindings = scm_cons(
scm_list_2(
scm_list_1(scm_from_utf8_symbol("guile")),
scm_from_utf8_symbol("eval")),
bindings
);
bindings = scm_cons(
scm_list_2(
scm_list_1(scm_from_utf8_symbol("guile")),
scm_from_utf8_symbol("interaction-environment")),
bindings
);
return bindings;
}
SCM eval_sandbox(SCM call) {
SCM eval = scm_c_public_ref("ice-9 sandbox", "eval-in-sandbox");
return scm_call_7(eval, call,
scm_from_utf8_keyword("time-limit"), scm_from_int64(3),
scm_from_utf8_keyword("allocation-limit"), scm_from_int64(1024 * 1024 * 1024),
scm_from_utf8_keyword("bindings"),
default_bindings()
);
}
typedef struct check_answer_args {
char *code;
char *actual;
char *expected;
} check_answer_args;
SCM check_answer_catch_body(void *data) {
check_answer_args *args = (check_answer_args *) data;
// SCM handler = scm_c_eval_string(args->code);
// SCM res = scm_call_1(handler, scm_from_utf8_string(args->data));
SCM readport = scm_open_input_string(scm_from_utf8_string(args->code));
SCM func = scm_read(readport);
SCM call = scm_list_3(func, scm_from_utf8_string(args->actual), scm_from_utf8_string(args->expected));
return eval_sandbox(call);
}
SCM check_answer_catch_handler(void *data, SCM key, SCM args) {
SCM format = scm_c_public_ref("ice-9 format", "format");
SCM fmt = scm_from_utf8_string("~a: ~a: ~a");
SCM func = scm_car(args);
SCM afmt = scm_cadr(args);
SCM aargs = scm_caddr(args);
SCM msg = scm_apply_2(format, SCM_BOOL_F, afmt, aargs);
return scm_call_5(format, SCM_BOOL_F, fmt, key, func, msg);
}
int check_answer(char **failure, char *code, char *actual, char *expected) {
scm_init_guile();
check_answer_args args = { .code = code, .actual = actual, .expected = expected };
SCM res = scm_c_catch(
SCM_BOOL_T,
check_answer_catch_body, &args,
check_answer_catch_handler, NULL,
check_answer_catch_handler, NULL);
if (scm_is_bool(res)) {
*failure = NULL;
return scm_to_bool(res);
} else {
*failure = scm_to_utf8_stringn(res, NULL);
return 0;
}
}
typedef struct gen_input_answer_args {
char *code;
char *twitchid;
} gen_input_answer_args;
SCM gen_input_answer_catch_body(void *data) {
gen_input_answer_args *args = (gen_input_answer_args *) data;
SCM readport = scm_open_input_string(scm_from_utf8_string(args->code));
SCM func = scm_read(readport);
SCM call = scm_list_2(func, scm_from_utf8_string(args->twitchid));
return eval_sandbox(call);
}
SCM gen_input_answer_catch_handler(void *data, SCM key, SCM args) {
SCM format = scm_c_public_ref("ice-9 format", "format");
SCM fmt = scm_from_utf8_string("~a: ~a: ~a");
SCM func = scm_car(args);
SCM afmt = scm_cadr(args);
SCM aargs = scm_caddr(args);
SCM msg = scm_apply_2(format, SCM_BOOL_F, afmt, aargs);
return scm_call_5(format, SCM_BOOL_F, fmt, key, func, msg);
}
void gen_input_answer(char **failure, char **input, char **answer, char *code, char *twitchid) {
scm_init_guile();
gen_input_answer_args args = { .code = code, .twitchid = twitchid };
SCM res = scm_c_catch(
SCM_BOOL_T,
gen_input_answer_catch_body, &args,
gen_input_answer_catch_handler, NULL,
gen_input_answer_catch_handler, NULL);
if (scm_is_pair(res)) {
*failure = NULL;
*input = scm_to_utf8_stringn(scm_car(res), NULL);
*answer = scm_to_utf8_stringn(scm_cdr(res), NULL);
} else {
*failure = scm_to_utf8_stringn(res, NULL);
}
}
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