int sexp_rest_unused_p (sexp lambda) {
sexp var;
for (var=sexp_lambda_params(lambda); sexp_pairp(var); var=sexp_cdr(var))
;
if (sexp_nullp(var)) return 0;
return !usedp(lambda, var, sexp_lambda_body(lambda));
}
static sexp sexp_translate_opcode_type (sexp ctx, sexp type) {
sexp_gc_var2(res, tmp);
res = type;
if (! res) {
res = sexp_type_by_index(ctx, SEXP_OBJECT);
} if (sexp_fixnump(res)) {
res = sexp_type_by_index(ctx, sexp_unbox_fixnum(res));
} else if (sexp_nullp(res)) { /* opcode list types */
sexp_gc_preserve2(ctx, res, tmp);
tmp = sexp_intern(ctx, "or", -1);
res = sexp_cons(ctx, SEXP_NULL, SEXP_NULL);
res = sexp_cons(ctx, sexp_type_by_index(ctx, SEXP_PAIR), res);
res = sexp_cons(ctx, tmp, res);
sexp_gc_release2(ctx);
}
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);
}
/* Returns 0 or an atom */
int
spki_get_type(struct sexp *e, struct sexp_iterator **res)
{
struct sexp_iterator *i;
int type;
if (sexp_atomp(e) || sexp_nullp(e))
return 0;
i = SEXP_ITER(e);
type = sexp2atom(SEXP_GET(i));
if (type && res)
{
SEXP_NEXT(i);
*res = i;
}
else
KILL(i);
return type;
}
static sexp sexp_sort_x (sexp ctx sexp_api_params(self, n), sexp seq,
sexp less, sexp key) {
sexp_sint_t len;
sexp res, *data;
sexp_gc_var1(vec);
if (sexp_nullp(seq)) return seq;
sexp_gc_preserve1(ctx, vec);
vec = (sexp_truep(sexp_listp(ctx, seq)) ? sexp_list_to_vector(ctx, seq) : seq);
if (! sexp_vectorp(vec)) {
res = sexp_type_exception(ctx, self, SEXP_VECTOR, vec);
} else {
data = sexp_vector_data(vec);
len = sexp_vector_length(vec);
if (sexp_not(key) && sexp_basic_comparator(less)) {
sexp_qsort(ctx, data, 0, len-1);
if (sexp_opcodep(less) && sexp_opcode_inverse(less))
sexp_vector_nreverse(ctx, vec);
res = vec;
} else if (! (sexp_procedurep(less) || sexp_opcodep(less))) {
res = sexp_type_exception(ctx, self, SEXP_PROCEDURE, less);
} else if (! (sexp_procedurep(key) || sexp_opcodep(key) || sexp_not(key))) {
res = sexp_type_exception(ctx, self, SEXP_PROCEDURE, key);
} else {
res = sexp_qsort_less(ctx, data, 0, len-1, less, key);
}
}
if (sexp_pairp(seq) && ! sexp_exceptionp(res))
res = sexp_vector_copy_to_list(ctx, vec, seq);
sexp_gc_release1(ctx);
return res;
}
static sexp simplify (sexp ctx, sexp ast, sexp init_substs, sexp lambda) {
int check;
sexp ls1, ls2, p1, p2, sv;
sexp_gc_var5(res, substs, tmp, app, ctx2);
sexp_gc_preserve5(ctx, res, substs, tmp, app, ctx2);
res = ast; /* return the ast as-is by default */
substs = init_substs;
loop:
switch (sexp_pointerp(res) ? sexp_pointer_tag(res) : 0) {
case SEXP_PAIR:
/* don't simplify the operator if it's a lambda because we
simplify that as a special case below, with the appropriate
substs list */
app = sexp_list1(ctx, sexp_lambdap(sexp_car(res)) ? sexp_car(res)
: (tmp=simplify(ctx, sexp_car(res), substs, lambda)));
sexp_pair_source(app) = sexp_pair_source(res);
for (ls1=sexp_cdr(res); sexp_pairp(ls1); ls1=sexp_cdr(ls1)) {
sexp_push(ctx, app, tmp=simplify(ctx, sexp_car(ls1), substs, lambda));
if (sexp_pairp(app)) sexp_pair_source(app) = sexp_pair_source(ls1);
}
app = sexp_nreverse(ctx, app);
/* app now holds a copy of the list, and is the default result
(res = app below) if we don't replace it with a simplification */
if (sexp_opcodep(sexp_car(app))) {
/* opcode app - right now we just constant fold arithmetic */
if (sexp_opcode_class(sexp_car(app)) == SEXP_OPC_ARITHMETIC) {
for (check=1, ls1=sexp_cdr(app); sexp_pairp(ls1); ls1=sexp_cdr(ls1)) {
if (sexp_pointerp(sexp_car(ls1)) && ! sexp_litp(sexp_car(ls1))) {
check = 0;
break;
}
}
if (check) {
ctx2 = sexp_make_eval_context(ctx, NULL, sexp_context_env(ctx), 0, 0);
sexp_generate(ctx2, 0, 0, 0, app);
res = sexp_complete_bytecode(ctx2);
if (! sexp_exceptionp(res)) {
tmp = sexp_make_vector(ctx2, 0, SEXP_VOID);
tmp = sexp_make_procedure(ctx2, SEXP_ZERO, SEXP_ZERO, res, tmp);
if (! sexp_exceptionp(tmp)) {
tmp = sexp_apply(ctx2, tmp, SEXP_NULL);
if (! sexp_exceptionp(tmp))
app = sexp_make_lit(ctx2, tmp);
}
}
}
}
} else if (lambda && sexp_lambdap(sexp_car(app))) { /* let */
p1 = NULL;
p2 = sexp_lambda_params(sexp_car(app));
ls1 = app;
ls2 = sexp_cdr(app);
sv = sexp_lambda_sv(sexp_car(app));
if (sexp_length(ctx, p2) == sexp_length(ctx, ls2)) {
for ( ; sexp_pairp(ls2); ls2=sexp_cdr(ls2), p2=sexp_cdr(p2)) {
if (sexp_not(sexp_memq(ctx, sexp_car(p2), sv))
&& (! sexp_pointerp(sexp_car(ls2)) || sexp_litp(sexp_car(ls2))
|| (sexp_refp(sexp_car(ls2))
&& sexp_lambdap(sexp_ref_loc(sexp_car(ls2)))
&& sexp_not(sexp_memq(ctx, sexp_ref_name(sexp_car(ls2)),
sexp_lambda_sv(sexp_ref_loc(sexp_car(ls2)))))))) {
tmp = sexp_cons(ctx, sexp_car(app), sexp_car(ls2));
tmp = sexp_cons(ctx, sexp_car(p2), tmp);
sexp_push(ctx, substs, tmp);
sexp_cdr(ls1) = sexp_cdr(ls2);
if (p1)
sexp_cdr(p1) = sexp_cdr(p2);
else
sexp_lambda_params(sexp_car(app)) = sexp_cdr(p2);
} else {
p1 = p2;
ls1 = ls2;
}
}
sexp_lambda_body(sexp_car(app))
= simplify(ctx, sexp_lambda_body(sexp_car(app)), substs, sexp_car(app));
if (sexp_nullp(sexp_cdr(app))
&& sexp_nullp(sexp_lambda_params(sexp_car(app)))
&& sexp_nullp(sexp_lambda_defs(sexp_car(app))))
app = sexp_lambda_body(sexp_car(app));
}
}
res = app;
break;
case SEXP_LAMBDA:
sexp_lambda_body(res) = simplify(ctx, sexp_lambda_body(res), substs, res);
break;
case SEXP_CND:
tmp = simplify(ctx, sexp_cnd_test(res), substs, lambda);
if (sexp_litp(tmp) || ! sexp_pointerp(tmp)) {
res = sexp_not((sexp_litp(tmp) ? sexp_lit_value(tmp) : tmp))
? sexp_cnd_fail(res) : sexp_cnd_pass(res);
goto loop;
} else {
sexp_cnd_test(res) = tmp;
simplify_it(sexp_cnd_pass(res));
simplify_it(sexp_cnd_fail(res));
}
break;
case SEXP_REF:
tmp = sexp_ref_name(res);
for (ls1=substs; sexp_pairp(ls1); ls1=sexp_cdr(ls1))
if ((sexp_caar(ls1) == tmp) && (sexp_cadar(ls1) == sexp_ref_loc(res))) {
res = sexp_cddar(ls1);
break;
}
break;
case SEXP_SET:
simplify_it(sexp_set_value(res));
break;
case SEXP_SEQ:
app = SEXP_NULL;
for (ls2=sexp_seq_ls(res); sexp_pairp(ls2); ls2=sexp_cdr(ls2)) {
tmp = simplify(ctx, sexp_car(ls2), substs, lambda);
if (! (sexp_pairp(sexp_cdr(ls2))
&& (sexp_litp(tmp) || ! sexp_pointerp(tmp) || sexp_refp(tmp)
|| sexp_lambdap(tmp))))
sexp_push(ctx, app, tmp);
}
if (sexp_pairp(app) && sexp_nullp(sexp_cdr(app)))
res = sexp_car(app);
else
sexp_seq_ls(res) = sexp_nreverse(ctx, app);
break;
}
sexp_gc_release5(ctx);
return res;
}
