OVMS3/OVMS.V3/components/duktape/src-separate/duk_bi_proxy.c

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/*
* Proxy built-in (ES2015)
*/
#include "duk_internal.h"
#if defined(DUK_USE_ES6_PROXY)
/* Post-process a Proxy ownKeys() result at stack top. Push a cleaned up
* array of valid result keys (strings or symbols). TypeError for invalid
* values. Flags are shared with duk_enum().
*/
DUK_INTERNAL void duk_proxy_ownkeys_postprocess(duk_hthread *thr, duk_hobject *h_proxy_target, duk_uint_t flags) {
duk_uarridx_t i, len, idx;
duk_propdesc desc;
DUK_CTX_ASSERT_VALID(thr);
DUK_ASSERT(h_proxy_target != NULL);
len = (duk_uarridx_t) duk_get_length(thr, -1);
idx = 0;
duk_push_array(thr);
/* XXX: preallocated dense array, fill in directly */
for (i = 0; i < len; i++) {
duk_hstring *h;
/* [ obj trap_result res_arr ] */
(void) duk_get_prop_index(thr, -2, i);
h = duk_get_hstring(thr, -1);
if (h == NULL) {
DUK_ERROR_TYPE_INVALID_TRAP_RESULT(thr);
DUK_WO_NORETURN(return;);
}
if (!(flags & DUK_ENUM_INCLUDE_NONENUMERABLE)) {
/* No support for 'getOwnPropertyDescriptor' trap yet,
* so check enumerability always from target object
* descriptor.
*/
if (duk_hobject_get_own_propdesc(thr, h_proxy_target, duk_known_hstring(thr, -1), &desc, 0 /*flags*/)) {
if ((desc.flags & DUK_PROPDESC_FLAG_ENUMERABLE) == 0) {
DUK_DDD(DUK_DDDPRINT("ignore non-enumerable property: %!T", duk_get_tval(thr, -1)));
goto skip_key;
}
} else {
DUK_DDD(DUK_DDDPRINT("ignore non-existent property: %!T", duk_get_tval(thr, -1)));
goto skip_key;
}
}
if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) {
if (!(flags & DUK_ENUM_INCLUDE_SYMBOLS)) {
DUK_DDD(DUK_DDDPRINT("ignore symbol property: %!T", duk_get_tval(thr, -1)));
goto skip_key;
}
if (DUK_HSTRING_HAS_HIDDEN(h) && !(flags & DUK_ENUM_INCLUDE_HIDDEN)) {
DUK_DDD(DUK_DDDPRINT("ignore hidden symbol property: %!T", duk_get_tval(thr, -1)));
goto skip_key;
}
} else {
if (flags & DUK_ENUM_EXCLUDE_STRINGS) {
DUK_DDD(DUK_DDDPRINT("ignore string property: %!T", duk_get_tval(thr, -1)));
goto skip_key;
}
}
/* [ obj trap_result res_arr propname ] */
duk_put_prop_index(thr, -2, idx++);
continue;
skip_key:
duk_pop(thr);
continue;
}
/* XXX: Missing trap result validation for non-configurable target keys
* (must be present), for non-extensible target all target keys must be
* present and no extra keys can be present.
* http://www.ecma-international.org/ecma-262/6.0/#sec-proxy-object-internal-methods-and-internal-slots-ownpropertykeys
*/
/* XXX: The key enumerability check should trigger the "getOwnPropertyDescriptor"
* trap which has not yet been implemented. In the absence of such a trap,
* the enumerability should be checked from the target object; this is
* handled above.
*/
}
#endif /* DUK_USE_ES6_PROXY */
#if defined(DUK_USE_ES6_PROXY)
DUK_INTERNAL duk_ret_t duk_bi_proxy_constructor(duk_hthread *thr) {
DUK_ASSERT_TOP(thr, 2); /* [ target handler ] */
duk_require_constructor_call(thr);
duk_push_proxy(thr, 0 /*flags*/); /* [ target handler ] -> [ proxy ] */
return 1; /* replacement */
}
#endif /* DUK_USE_ES6_PROXY */