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/*
* Pointer built-ins
*/
#include "duk_internal.h"
/*
* Constructor
*/
DUK_INTERNAL duk_ret_t duk_bi_pointer_constructor(duk_hthread *thr) {
/* XXX: this behavior is quite useless now; it would be nice to be able
* to create pointer values from e.g. numbers or strings. Numbers are
* problematic on 64-bit platforms though. Hex encoded strings?
*/
if (duk_get_top(thr) == 0) {
duk_push_pointer(thr, NULL);
} else {
duk_to_pointer(thr, 0);
}
DUK_ASSERT(duk_is_pointer(thr, 0));
duk_set_top(thr, 1);
if (duk_is_constructor_call(thr)) {
(void) duk_push_object_helper(thr,
DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_POINTER),
DUK_BIDX_POINTER_PROTOTYPE);
/* Pointer object internal value is immutable. */
duk_dup_0(thr);
duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
}
/* Note: unbalanced stack on purpose */
return 1;
}
/*
* toString(), valueOf()
*/
DUK_INTERNAL duk_ret_t duk_bi_pointer_prototype_tostring_shared(duk_hthread *thr) {
duk_tval *tv;
duk_small_int_t to_string = duk_get_current_magic(thr);
duk_push_this(thr);
tv = duk_require_tval(thr, -1);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_POINTER(tv)) {
/* nop */
} else if (DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
/* Must be a "pointer object", i.e. class "Pointer" */
if (DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_POINTER) {
goto type_error;
}
duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_VALUE);
} else {
goto type_error;
}
if (to_string) {
duk_to_string(thr, -1);
}
return 1;
type_error:
DUK_DCERROR_TYPE_INVALID_ARGS(thr);
}
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