static sexp check_exception (sexp ctx, sexp res) {
sexp_gc_var4(err, advise, sym, tmp);
if (res && sexp_exceptionp(res)) {
sexp_gc_preserve4(ctx, err, advise, sym, tmp);
tmp = res;
err = sexp_current_error_port(ctx);
if (! sexp_oportp(err))
err = sexp_make_output_port(ctx, stderr, SEXP_FALSE);
sexp_print_exception(ctx, res, err);
sexp_stack_trace(ctx, err);
#if SEXP_USE_MAIN_ERROR_ADVISE
if (sexp_envp(sexp_global(ctx, SEXP_G_META_ENV))) {
advise = sexp_eval_string(ctx, sexp_advice_environment, -1, sexp_global(ctx, SEXP_G_META_ENV));
if (sexp_vectorp(advise)) {
advise = sexp_vector_ref(advise, SEXP_ONE);
if (sexp_envp(advise)) {
sym = sexp_intern(ctx, "repl-advise-exception", -1);
advise = sexp_env_ref(ctx, advise, sym, SEXP_FALSE);
if (sexp_procedurep(advise))
sexp_apply(ctx, advise, tmp=sexp_list2(ctx, res, err));
}
}
}
#endif
sexp_gc_release4(ctx);
exit_failure();
}
return res;
}
static sexp check_exception (sexp ctx, sexp res) {
sexp err;
if (res && sexp_exceptionp(res)) {
err = sexp_current_error_port(ctx);
if (! sexp_oportp(err))
err = sexp_make_output_port(ctx, stderr, SEXP_FALSE);
sexp_print_exception(ctx, res, err);
sexp_stack_trace(ctx, err);
exit_failure();
}
return res;
}
static void repl (sexp ctx, sexp env) {
sexp_gc_var6(obj, tmp, res, in, out, err);
sexp_gc_preserve6(ctx, obj, tmp, res, in, out, err);
sexp_context_tracep(ctx) = 1;
in = sexp_param_ref(ctx, env, sexp_global(ctx, SEXP_G_CUR_IN_SYMBOL));
out = sexp_param_ref(ctx, env, sexp_global(ctx, SEXP_G_CUR_OUT_SYMBOL));
err = sexp_param_ref(ctx, env, sexp_global(ctx, SEXP_G_CUR_ERR_SYMBOL));
if (in == NULL || out == NULL) {
fprintf(stderr, "Standard I/O ports not found, aborting. Maybe a bad -x language?\n");
exit_failure();
}
if (err == NULL) err = out;
sexp_port_sourcep(in) = 1;
while (1) {
sexp_write_string(ctx, "> ", out);
sexp_flush(ctx, out);
sexp_maybe_block_port(ctx, in, 1);
obj = sexp_read(ctx, in);
sexp_maybe_unblock_port(ctx, in);
if (obj == SEXP_EOF)
break;
if (sexp_exceptionp(obj)) {
sexp_print_exception(ctx, obj, err);
} else {
sexp_context_top(ctx) = 0;
if (!(sexp_idp(obj)||sexp_pairp(obj)||sexp_nullp(obj)))
obj = sexp_make_lit(ctx, obj);
tmp = sexp_env_bindings(env);
res = sexp_eval(ctx, obj, env);
#if SEXP_USE_WARN_UNDEFS
sexp_warn_undefs(ctx, sexp_env_bindings(env), tmp, res);
#endif
if (res && sexp_exceptionp(res)) {
sexp_print_exception(ctx, res, err);
if (res != sexp_global(ctx, SEXP_G_OOS_ERROR))
sexp_stack_trace(ctx, err);
} else if (res != SEXP_VOID) {
sexp_write(ctx, res, out);
sexp_write_char(ctx, '\n', out);
}
}
}
sexp_gc_release6(ctx);
}
static void repl (sexp ctx, sexp env) {
sexp in, out, err;
sexp_gc_var3(obj, tmp, res);
sexp_gc_preserve3(ctx, obj, tmp, res);
sexp_context_tracep(ctx) = 1;
in = sexp_param_ref(ctx, env, sexp_global(ctx, SEXP_G_CUR_IN_SYMBOL));
out = sexp_param_ref(ctx, env, sexp_global(ctx, SEXP_G_CUR_OUT_SYMBOL));
err = sexp_param_ref(ctx, env, sexp_global(ctx, SEXP_G_CUR_ERR_SYMBOL));
sexp_port_sourcep(in) = 1;
while (1) {
sexp_write_string(ctx, "> ", out);
sexp_flush(ctx, out);
sexp_maybe_block_port(ctx, in, 1);
obj = sexp_read(ctx, in);
sexp_maybe_unblock_port(ctx, in);
if (obj == SEXP_EOF)
break;
if (sexp_exceptionp(obj)) {
sexp_print_exception(ctx, obj, err);
} else {
tmp = sexp_env_bindings(env);
sexp_context_top(ctx) = 0;
res = sexp_eval(ctx, obj, env);
if (sexp_exceptionp(res)) {
sexp_print_exception(ctx, res, err);
sexp_stack_trace(ctx, err);
} else {
#if SEXP_USE_WARN_UNDEFS
sexp_warn_undefs(ctx, sexp_env_bindings(env), tmp);
#endif
if (res != SEXP_VOID) {
sexp_write(ctx, res, out);
sexp_write_char(ctx, '\n', out);
}
}
}
}
sexp_gc_release3(ctx);
}
