int duk_builtin_number_prototype_to_exponential(duk_context *ctx) {
int frac_undefined;
int frac_digits;
double d;
int c;
int n2s_flags;
d = push_this_number_plain(ctx);
frac_undefined = duk_is_undefined(ctx, 0);
duk_to_int(ctx, 0); /* for side effects */
c = DUK_FPCLASSIFY(d);
if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) {
goto use_to_string;
}
frac_digits = duk_to_int_check_range(ctx, 0, 0, 20);
n2s_flags = DUK_N2S_FLAG_FORCE_EXP |
(frac_undefined ? 0 : DUK_N2S_FLAG_FIXED_FORMAT);
duk_numconv_stringify(ctx,
10 /*radix*/,
frac_digits + 1 /*leading digit + fractions*/,
n2s_flags /*flags*/);
return 1;
use_to_string:
DUK_ASSERT_TOP(ctx, 2);
duk_to_string(ctx, -1);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_create(duk_hthread *thr) {
duk_hobject *proto;
DUK_ASSERT_TOP(thr, 2);
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
duk_hbufobj_promote_plain(thr, 0);
#endif
proto = duk_require_hobject_accept_mask(thr, 0, DUK_TYPE_MASK_NULL);
DUK_ASSERT(proto != NULL || duk_is_null(thr, 0));
(void) duk_push_object_helper_proto(thr,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_FASTREFS |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
proto);
if (!duk_is_undefined(thr, 1)) {
/* [ O Properties obj ] */
duk_replace(thr, 0);
/* [ obj Properties ] */
/* Just call the "original" Object.defineProperties() to
* finish up.
*/
return duk_bi_object_constructor_define_properties(thr);
}
/* [ O Properties obj ] */
return 1;
}
duk_ret_t duk_bi_number_prototype_to_fixed(duk_context *ctx) {
duk_small_int_t frac_digits;
duk_double_t d;
duk_small_int_t c;
duk_small_uint_t n2s_flags;
frac_digits = (duk_small_int_t) duk_to_int_check_range(ctx, 0, 0, 20);
d = duk__push_this_number_plain(ctx);
c = (duk_small_int_t) DUK_FPCLASSIFY(d);
if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) {
goto use_to_string;
}
if (d >= 1.0e21 || d <= -1.0e21) {
goto use_to_string;
}
n2s_flags = DUK_N2S_FLAG_FIXED_FORMAT |
DUK_N2S_FLAG_FRACTION_DIGITS;
duk_numconv_stringify(ctx,
10 /*radix*/,
frac_digits /*digits*/,
n2s_flags /*flags*/);
return 1;
use_to_string:
DUK_ASSERT_TOP(ctx, 2);
duk_to_string(ctx, -1);
return 1;
}
DUK_LOCAL duk_ret_t duk__error_setter_helper(duk_context *ctx, duk_small_uint_t stridx_key) {
/* Attempt to write 'stack', 'fileName', 'lineNumber' works as if
* user code called Object.defineProperty() to create an overriding
* own property. This allows user code to overwrite .fileName etc
* intuitively as e.g. "err.fileName = 'dummy'" as one might expect.
* See https://github.com/svaarala/duktape/issues/387.
*/
DUK_ASSERT_TOP(ctx, 1); /* fixed arg count: value */
duk_push_this(ctx);
duk_push_hstring_stridx(ctx, (duk_small_int_t) stridx_key);
duk_dup_0(ctx);
/* [ ... obj key value ] */
DUK_DD(DUK_DDPRINT("error setter: %!T %!T %!T",
duk_get_tval(ctx, -3), duk_get_tval(ctx, -2), duk_get_tval(ctx, -1)));
duk_def_prop(ctx, -3, DUK_DEFPROP_HAVE_VALUE |
DUK_DEFPROP_HAVE_WRITABLE | DUK_DEFPROP_WRITABLE |
DUK_DEFPROP_HAVE_ENUMERABLE | /*not enumerable*/
DUK_DEFPROP_HAVE_CONFIGURABLE | DUK_DEFPROP_CONFIGURABLE);
return 0;
}
int duk_bi_error_prototype_nop_setter(duk_context *ctx) {
/* Attempt to write 'stack', 'fileName', 'lineNumber' is a silent no-op.
* User can use Object.defineProperty() to override this behavior.
*/
DUK_ASSERT_TOP(ctx, 1); /* fixed arg count */
DUK_UNREF(ctx);
return 0;
}
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_reverse(duk_context *ctx) {
duk_uint32_t len;
duk_uint32_t middle;
duk_uint32_t lower, upper;
duk_bool_t have_lower, have_upper;
len = duk__push_this_obj_len_u32(ctx);
middle = len / 2;
/* If len <= 1, middle will be 0 and for-loop bails out
* immediately (0 < 0 -> false).
*/
for (lower = 0; lower < middle; lower++) {
DUK_ASSERT(len >= 2);
DUK_ASSERT_TOP(ctx, 2);
DUK_ASSERT(len >= lower + 1);
upper = len - lower - 1;
have_lower = duk_get_prop_index(ctx, -2, (duk_uarridx_t) lower);
have_upper = duk_get_prop_index(ctx, -3, (duk_uarridx_t) upper);
/* [ ToObject(this) ToUint32(length) lowerValue upperValue ] */
if (have_upper) {
duk_put_prop_index(ctx, -4, (duk_uarridx_t) lower);
} else {
duk_del_prop_index(ctx, -4, (duk_uarridx_t) lower);
duk_pop(ctx);
}
if (have_lower) {
duk_put_prop_index(ctx, -3, (duk_uarridx_t) upper);
} else {
duk_del_prop_index(ctx, -3, (duk_uarridx_t) upper);
duk_pop(ctx);
}
DUK_ASSERT_TOP(ctx, 2);
}
DUK_ASSERT_TOP(ctx, 2);
duk_pop(ctx); /* -> [ ToObject(this) ] */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_duktape_object_enc(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_str;
DUK_UNREF(thr);
/* Vararg function: must be careful to check/require arguments.
* The JSON helpers accept invalid indices and treat them like
* non-existent optional parameters.
*/
h_str = duk_require_hstring(ctx, 0);
duk_require_valid_index(ctx, 1);
if (h_str == DUK_HTHREAD_STRING_HEX(thr)) {
duk_set_top(ctx, 2);
duk_hex_encode(ctx, 1);
DUK_ASSERT_TOP(ctx, 2);
} else if (h_str == DUK_HTHREAD_STRING_BASE64(thr)) {
duk_set_top(ctx, 2);
duk_base64_encode(ctx, 1);
DUK_ASSERT_TOP(ctx, 2);
#ifdef DUK_USE_JX
} else if (h_str == DUK_HTHREAD_STRING_JX(thr)) {
duk_bi_json_stringify_helper(ctx,
1 /*idx_value*/,
2 /*idx_replacer*/,
3 /*idx_space*/,
DUK_JSON_FLAG_EXT_CUSTOM |
DUK_JSON_FLAG_ASCII_ONLY |
DUK_JSON_FLAG_AVOID_KEY_QUOTES /*flags*/);
#endif
#ifdef DUK_USE_JC
} else if (h_str == DUK_HTHREAD_STRING_JC(thr)) {
duk_bi_json_stringify_helper(ctx,
1 /*idx_value*/,
2 /*idx_replacer*/,
3 /*idx_space*/,
DUK_JSON_FLAG_EXT_COMPATIBLE |
DUK_JSON_FLAG_ASCII_ONLY /*flags*/);
#endif
} else {
return DUK_RET_TYPE_ERROR;
}
return 1;
}
duk_ret_t duk_bi_number_prototype_to_precision(duk_context *ctx) {
/* The specification has quite awkward order of coercion and
* checks for toPrecision(). The operations below are a bit
* reordered, within constraints of observable side effects.
*/
duk_double_t d;
duk_small_int_t prec;
duk_small_int_t c;
duk_small_uint_t n2s_flags;
DUK_ASSERT_TOP(ctx, 1);
d = duk__push_this_number_plain(ctx);
if (duk_is_undefined(ctx, 0)) {
goto use_to_string;
}
DUK_ASSERT_TOP(ctx, 2);
duk_to_int(ctx, 0); /* for side effects */
c = (duk_small_int_t) DUK_FPCLASSIFY(d);
if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) {
goto use_to_string;
}
prec = (duk_small_int_t) duk_to_int_check_range(ctx, 0, 1, 21);
n2s_flags = DUK_N2S_FLAG_FIXED_FORMAT |
DUK_N2S_FLAG_NO_ZERO_PAD;
duk_numconv_stringify(ctx,
10 /*radix*/,
prec /*digits*/,
n2s_flags /*flags*/);
return 1;
use_to_string:
/* Used when precision is undefined; also used for NaN (-> "NaN"),
* and +/- infinity (-> "Infinity", "-Infinity").
*/
DUK_ASSERT_TOP(ctx, 2);
duk_to_string(ctx, -1);
return 1;
}
int duk_builtin_duk_object_dec(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_str;
h_str = duk_to_hstring(ctx, 0);
if (h_str == DUK_HTHREAD_STRING_HEX(thr)) {
duk_hex_decode(ctx, 1);
DUK_ASSERT_TOP(ctx, 2);
return 1;
} else if (h_str == DUK_HTHREAD_STRING_BASE64(thr)) {
duk_base64_decode(ctx, 1);
DUK_ASSERT_TOP(ctx, 2);
return 1;
} else {
return DUK_RET_TYPE_ERROR;
}
}
void duk_hobject_run_finalizer(duk_hthread *thr, duk_hobject *obj) {
duk_context *ctx = (duk_context *) thr;
int rc;
#ifdef DUK_USE_ASSERTIONS
int entry_top;
#endif
DUK_DDDPRINT("running object finalizer for object: %p", (void *) obj);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(obj != NULL);
/* FIXME: assert stack space */
#ifdef DUK_USE_ASSERTIONS
entry_top = duk_get_top(ctx);
#endif
/*
* Get and call the finalizer. All of this must be wrapped
* in a protected call, because even getting the finalizer
* may trigger an error (getter may throw one, for instance).
*/
/* FIXME: use a NULL error handler for the finalizer call? */
DUK_DDDPRINT("-> finalizer found, calling wrapped finalize helper");
duk_push_hobject(ctx, obj); /* this also increases refcount by one */
rc = duk_safe_call(ctx, _finalize_helper, 0 /*nargs*/, 1 /*nrets*/, DUK_INVALID_INDEX); /* -> [... obj retval/error] */
DUK_ASSERT_TOP(ctx, entry_top + 2); /* duk_safe_call discipline */
if (rc != DUK_ERR_EXEC_SUCCESS) {
/* Note: we ask for one return value from duk_safe_call to get this
* error debugging here.
*/
DUK_DPRINT("wrapped finalizer call failed for object %p (ignored); error: %!T",
(void *) obj, duk_get_tval(ctx, -1));
}
duk_pop_2(ctx); /* -> [...] */
DUK_ASSERT_TOP(ctx, entry_top);
}
DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_tostring(duk_hthread *thr) {
/* This must be generic in ES2015 and later. */
DUK_ASSERT_TOP(thr, 0);
duk_push_this(thr);
duk_push_literal(thr, "/");
duk_get_prop_stridx(thr, 0, DUK_STRIDX_SOURCE);
duk_dup_m2(thr); /* another "/" */
duk_get_prop_stridx(thr, 0, DUK_STRIDX_FLAGS);
duk_concat(thr, 4);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_seal_freeze_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h;
duk_bool_t is_freeze;
DUK_ASSERT_TOP(ctx, 1);
is_freeze = (duk_bool_t) duk_get_current_magic(ctx);
if (duk_is_buffer(ctx, 0)) {
/* Plain buffer: already sealed, but not frozen (and can't be frozen
* because index properties can't be made non-writable.
*/
if (is_freeze) {
goto fail_cannot_freeze;
}
return 1;
} else if (duk_is_lightfunc(ctx, 0)) {
/* Lightfunc: already sealed and frozen, success. */
return 1;
}
#if 0
/* Seal/freeze are quite rare in practice so it'd be nice to get the
* correct behavior simply via automatic promotion (at the cost of some
* memory churn). However, the promoted objects don't behave the same,
* e.g. promoted lightfuncs are extensible.
*/
h = duk_require_hobject_promote_mask(ctx, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER);
#endif
h = duk_get_hobject(ctx, 0);
if (h == NULL) {
/* ES2015 Sections 19.1.2.5, 19.1.2.17 */
return 1;
}
if (is_freeze && DUK_HOBJECT_IS_BUFOBJ(h)) {
/* Buffer objects cannot be frozen because there's no internal
* support for making virtual array indices non-writable.
*/
DUK_DD(DUK_DDPRINT("cannot freeze a buffer object"));
goto fail_cannot_freeze;
}
duk_hobject_object_seal_freeze_helper(thr, h, is_freeze);
/* Sealed and frozen objects cannot gain any more properties,
* so this is a good time to compact them.
*/
duk_hobject_compact_props(thr, h);
return 1;
fail_cannot_freeze:
DUK_DCERROR_TYPE_INVALID_ARGS(thr); /* XXX: proper error message */
}
DUK_INTERNAL duk_ret_t duk_bi_object_prototype_to_locale_string(duk_context *ctx) {
DUK_ASSERT_TOP(ctx, 0);
(void) duk_push_this_coercible_to_object(ctx);
duk_get_prop_stridx(ctx, 0, DUK_STRIDX_TO_STRING);
if (!duk_is_callable(ctx, 1)) {
return DUK_RET_TYPE_ERROR;
}
duk_dup(ctx, 0); /* -> [ O toString O ] */
duk_call_method(ctx, 0); /* XXX: call method tailcall? */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_prototype_to_locale_string(duk_hthread *thr) {
DUK_ASSERT_TOP(thr, 0);
(void) duk_push_this_coercible_to_object(thr);
duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_TO_STRING);
#if 0 /* This is mentioned explicitly in the E5.1 spec, but duk_call_method() checks for it in practice. */
duk_require_callable(thr, 1);
#endif
duk_dup_0(thr); /* -> [ O toString O ] */
duk_call_method(thr, 0); /* XXX: call method tail call? */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_proxy_constructor(duk_context *ctx) {
duk_hobject *h_target;
duk_hobject *h_handler;
if (!duk_is_constructor_call(ctx)) {
return DUK_RET_TYPE_ERROR;
}
/* Reject a proxy object as the target because it would need
* special handler in property lookups. (ES6 has no such restriction)
*/
h_target = duk_require_hobject_or_lfunc_coerce(ctx, 0);
DUK_ASSERT(h_target != NULL);
if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h_target)) {
return DUK_RET_TYPE_ERROR;
}
/* Reject a proxy object as the handler because it would cause
* potentially unbounded recursion. (ES6 has no such restriction)
*/
h_handler = duk_require_hobject_or_lfunc_coerce(ctx, 1);
DUK_ASSERT(h_handler != NULL);
if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h_handler)) {
return DUK_RET_TYPE_ERROR;
}
/* XXX: the returned value is exotic in ES6, but we use a
* simple object here with no prototype. Without a prototype,
* [[DefaultValue]] coercion fails which is abit confusing.
* No callable check/handling in the current Proxy subset.
*/
(void) duk_push_object_helper_proto(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
NULL);
DUK_ASSERT_TOP(ctx, 3);
/* Make _Target and _Handler non-configurable and non-writable.
* They can still be forcibly changed by C code (both user and
* Duktape internal), but not by Ecmascript code.
*/
/* Proxy target */
duk_dup(ctx, 0);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_TARGET, DUK_PROPDESC_FLAGS_NONE);
/* Proxy handler */
duk_dup(ctx, 1);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_HANDLER, DUK_PROPDESC_FLAGS_NONE);
return 1; /* replacement handler */
}
int duk_bi_array_prototype_reverse(duk_context *ctx) {
unsigned int len;
unsigned int middle;
unsigned int lower, upper;
int have_lower, have_upper;
len = duk__push_this_obj_len_u32(ctx);
middle = len / 2;
for (lower = 0; lower < middle; lower++) {
DUK_ASSERT_TOP(ctx, 2);
upper = len - lower - 1;
have_lower = duk_get_prop_index(ctx, -2, lower);
have_upper = duk_get_prop_index(ctx, -3, upper);
/* [ ToObject(this) ToUint32(length) lowerValue upperValue ] */
if (have_upper) {
duk_put_prop_index(ctx, -4, lower); /* FIXME: Throw */
} else {
duk_del_prop_index(ctx, -4, lower);
duk_pop(ctx);
}
if (have_lower) {
duk_put_prop_index(ctx, -3, upper);
} else {
duk_del_prop_index(ctx, -3, upper);
duk_pop(ctx);
}
DUK_ASSERT_TOP(ctx, 2);
}
DUK_ASSERT_TOP(ctx, 2);
duk_pop(ctx); /* -> [ ToObject(this) ] */
return 1;
}
duk_ret_t duk_bi_duk_object_dec(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_str;
/* Vararg function: must be careful to check/require arguments.
* The JSON helpers accept invalid indices and treat them like
* non-existent optional parameters.
*/
h_str = duk_require_hstring(ctx, 0);
duk_require_valid_index(ctx, 1);
if (h_str == DUK_HTHREAD_STRING_HEX(thr)) {
duk_set_top(ctx, 2);
duk_hex_decode(ctx, 1);
DUK_ASSERT_TOP(ctx, 2);
} else if (h_str == DUK_HTHREAD_STRING_BASE64(thr)) {
duk_set_top(ctx, 2);
duk_base64_decode(ctx, 1);
DUK_ASSERT_TOP(ctx, 2);
#ifdef DUK_USE_JSONX
} else if (h_str == DUK_HTHREAD_STRING_JSONX(thr)) {
duk_bi_json_parse_helper(ctx,
1 /*idx_value*/,
2 /*idx_replacer*/,
DUK_JSON_FLAG_EXT_CUSTOM /*flags*/);
#endif
#ifdef DUK_USE_JSONC
} else if (h_str == DUK_HTHREAD_STRING_JSONC(thr)) {
duk_bi_json_parse_helper(ctx,
1 /*idx_value*/,
2 /*idx_replacer*/,
DUK_JSON_FLAG_EXT_COMPATIBLE /*flags*/);
#endif
} else {
return DUK_RET_TYPE_ERROR;
}
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_get_own_property_descriptor(duk_hthread *thr) {
DUK_ASSERT_TOP(thr, 2);
/* ES2015 Section 19.1.2.6, step 1 */
if (duk_get_current_magic(thr) == 0) {
duk_to_object(thr, 0);
}
/* [ obj key ] */
duk_hobject_object_get_own_property_descriptor(thr, -2);
return 1;
}
duk_ret_t duk_bi_number_constructor(duk_context *ctx) {
duk_idx_t nargs;
duk_hobject *h_this;
/*
* The Number constructor uses ToNumber(arg) for number coercion
* (coercing an undefined argument to NaN). However, if the
* argument is not given at all, +0 must be used instead. To do
* this, a vararg function is used.
*/
nargs = duk_get_top(ctx);
if (nargs == 0) {
duk_push_int(ctx, 0);
}
duk_to_number(ctx, 0);
duk_set_top(ctx, 1);
DUK_ASSERT_TOP(ctx, 1);
if (!duk_is_constructor_call(ctx)) {
return 1;
}
/*
* E5 Section 15.7.2.1 requires that the constructed object
* must have the original Number.prototype as its internal
* prototype. However, since Number.prototype is non-writable
* and non-configurable, this doesn't have to be enforced here:
* The default object (bound to 'this') is OK, though we have
* to change its class.
*
* Internal value set to ToNumber(arg) or +0; if no arg given,
* ToNumber(undefined) = NaN, so special treatment is needed
* (above). String internal value is immutable.
*/
/* XXX: helper */
duk_push_this(ctx);
h_this = duk_get_hobject(ctx, -1);
DUK_ASSERT(h_this != NULL);
DUK_HOBJECT_SET_CLASS_NUMBER(h_this, DUK_HOBJECT_CLASS_NUMBER);
DUK_ASSERT(h_this->prototype == ((duk_hthread *) ctx)->builtins[DUK_BIDX_NUMBER_PROTOTYPE]);
DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(h_this) == DUK_HOBJECT_CLASS_NUMBER);
DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(h_this));
duk_dup(ctx, 0); /* -> [ val obj val ] */
duk_def_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
return 0; /* no return value -> don't replace created value */
}
/* Shared helper to implement Object.getPrototypeOf,
* Object.prototype.__proto__ getter, and Reflect.getPrototypeOf.
*
* http://www.ecma-international.org/ecma-262/6.0/index.html#sec-get-object.prototype.__proto__
*/
DUK_INTERNAL duk_ret_t duk_bi_object_getprototype_shared(duk_context *ctx) {
/*
* magic = 0: __proto__ getter
* magic = 1: Object.getPrototypeOf()
* magic = 2: Reflect.getPrototypeOf()
*/
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h;
duk_hobject *proto;
duk_tval *tv;
duk_int_t magic;
magic = duk_get_current_magic(ctx);
if (magic == 0) {
DUK_ASSERT_TOP(ctx, 0);
duk_push_this_coercible_to_object(ctx);
}
DUK_ASSERT(duk_get_top(ctx) >= 1);
if (magic < 2) {
/* ES2015 Section 19.1.2.9, step 1 */
duk_to_object(ctx, 0);
}
tv = DUK_GET_TVAL_POSIDX(ctx, 0);
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_BUFFER:
proto = thr->builtins[DUK_BIDX_UINT8ARRAY_PROTOTYPE];
break;
case DUK_TAG_LIGHTFUNC:
proto = thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE];
break;
case DUK_TAG_OBJECT:
h = DUK_TVAL_GET_OBJECT(tv);
proto = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h);
break;
default:
/* This implicitly handles CheckObjectCoercible() caused
* TypeError.
*/
DUK_DCERROR_TYPE_INVALID_ARGS(thr);
}
if (proto != NULL) {
duk_push_hobject(ctx, proto);
} else {
duk_push_null(ctx);
}
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_shift(duk_context *ctx) {
duk_uint32_t len;
duk_uint32_t i;
len = duk__push_this_obj_len_u32(ctx);
if (len == 0) {
duk_push_int(ctx, 0);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH);
return 0;
}
duk_get_prop_index(ctx, 0, 0);
/* stack[0] = object (this)
* stack[1] = ToUint32(length)
* stack[2] = elem at index 0 (retval)
*/
for (i = 1; i < len; i++) {
DUK_ASSERT_TOP(ctx, 3);
if (duk_get_prop_index(ctx, 0, (duk_uarridx_t) i)) {
/* fromPresent = true */
duk_put_prop_index(ctx, 0, (duk_uarridx_t) (i - 1));
} else {
/* fromPresent = false */
duk_del_prop_index(ctx, 0, (duk_uarridx_t) (i - 1));
duk_pop(ctx);
}
}
duk_del_prop_index(ctx, 0, (duk_uarridx_t) (len - 1));
duk_push_u32(ctx, (duk_uint32_t) (len - 1));
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH);
DUK_ASSERT_TOP(ctx, 3);
return 1;
}
int duk_bi_array_prototype_shift(duk_context *ctx) {
unsigned int len;
unsigned int i;
len = duk__push_this_obj_len_u32(ctx);
if (len == 0) {
duk_push_int(ctx, 0);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH); /* FIXME: Throw */
return 0;
}
duk_get_prop_index(ctx, 0, 0);
/* stack[0] = object (this)
* stack[1] = ToUint32(length)
* stack[2] = elem at index 0 (retval)
*/
for (i = 1; i < len; i++) {
DUK_ASSERT_TOP(ctx, 3);
if (duk_get_prop_index(ctx, 0, i)) {
/* fromPresent = true */
duk_put_prop_index(ctx, 0, i - 1); /* FIXME: Throw */
} else {
/* fromPresent = false */
duk_del_prop_index(ctx, 0, i - 1);
duk_pop(ctx);
}
}
duk_del_prop_index(ctx, 0, len - 1); /* FIXME: Throw */
duk_push_number(ctx, (double) (len - 1)); /* FIXME: push uint */
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH);
DUK_ASSERT_TOP(ctx, 3);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_unshift(duk_context *ctx) {
duk_idx_t nargs;
duk_uint32_t len;
duk_uint32_t i;
nargs = duk_get_top(ctx);
len = duk__push_this_obj_len_u32(ctx);
/* stack[0...nargs-1] = unshift args (vararg)
* stack[nargs] = ToObject(this)
* stack[nargs+1] = ToUint32(length)
*/
DUK_ASSERT_TOP(ctx, nargs + 2);
/* Note: unshift() may operate on indices above unsigned 32-bit range
* and the final length may be >= 2**32. However, we restrict the
* final result to 32-bit range for practicality.
*/
if (len + (duk_uint32_t) nargs < len) {
DUK_D(DUK_DPRINT("Array.prototype.unshift() would go beyond 32-bit length, throw"));
return DUK_RET_RANGE_ERROR;
}
i = len;
while (i > 0) {
DUK_ASSERT_TOP(ctx, nargs + 2);
i--;
/* k+argCount-1; note that may be above 32-bit range */
if (duk_get_prop_index(ctx, -2, (duk_uarridx_t) i)) {
/* fromPresent = true */
/* [ ... ToObject(this) ToUint32(length) val ] */
duk_put_prop_index(ctx, -3, (duk_uarridx_t) (i + nargs)); /* -> [ ... ToObject(this) ToUint32(length) ] */
} else {
/* fromPresent = false */
/* [ ... ToObject(this) ToUint32(length) val ] */
duk_pop(ctx);
duk_del_prop_index(ctx, -2, (duk_uarridx_t) (i + nargs)); /* -> [ ... ToObject(this) ToUint32(length) ] */
}
DUK_ASSERT_TOP(ctx, nargs + 2);
}
for (i = 0; i < (duk_uint32_t) nargs; i++) {
DUK_ASSERT_TOP(ctx, nargs + 2);
duk_dup(ctx, i); /* -> [ ... ToObject(this) ToUint32(length) arg[i] ] */
duk_put_prop_index(ctx, -3, (duk_uarridx_t) i);
DUK_ASSERT_TOP(ctx, nargs + 2);
}
DUK_ASSERT_TOP(ctx, nargs + 2);
duk_push_u32(ctx, len + nargs);
duk_dup_top(ctx); /* -> [ ... ToObject(this) ToUint32(length) final_len final_len ] */
duk_put_prop_stridx(ctx, -4, DUK_STRIDX_LENGTH);
return 1;
}
int duk_bi_array_prototype_sort(duk_context *ctx) {
unsigned int len;
len = duk__push_this_obj_len_u32(ctx);
/* stack[0] = compareFn
* stack[1] = ToObject(this)
* stack[2] = ToUint32(length)
*/
duk__array_qsort(ctx, 0, len - 1);
DUK_ASSERT_TOP(ctx, 3);
duk_pop(ctx);
return 1; /* return ToObject(this) */
}
int duk_builtin_object_constructor_create(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_hobject *proto = NULL;
duk_hobject *h;
DUK_ASSERT_TOP(ctx, 2);
tv = duk_get_tval(ctx, 0);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_NULL(tv)) {
;
} else if (DUK_TVAL_IS_OBJECT(tv)) {
proto = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(proto != NULL);
} else {
return DUK_RET_TYPE_ERROR;
}
/* FIXME: direct helper to create with specific prototype */
(void) duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
-1);
h = duk_get_hobject(ctx, -1);
DUK_ASSERT(h != NULL);
DUK_ASSERT(h->prototype == NULL);
DUK_HOBJECT_SET_PROTOTYPE(thr, h, proto);
if (!duk_is_undefined(ctx, 1)) {
/* [ O Properties obj ] */
/* Use original function. No need to get it explicitly,
* just call the helper.
*/
duk_replace(ctx, 0);
/* [ obj Properties ] */
return duk_hobject_object_define_properties(ctx);
}
/* [ O Properties obj ] */
return 1;
}
int duk_bi_array_prototype_unshift(duk_context *ctx) {
unsigned int nargs;
unsigned int len;
unsigned int i;
double final_len;
/* FIXME: duk_get_top return type */
nargs = (unsigned int) duk_get_top(ctx);
len = duk__push_this_obj_len_u32(ctx);
/* stack[0...nargs-1] = unshift args (vararg)
* stack[nargs] = ToObject(this)
* stack[nargs+1] = ToUint32(length)
*/
DUK_ASSERT_TOP(ctx, nargs + 2);
/* Note: unshift() may operate on indices above unsigned 32-bit range
* and the final length may be >= 2**32. Hence we use 'double' vars
* here, when appropriate.
*/
i = len;
while (i > 0) {
DUK_ASSERT_TOP(ctx, nargs + 2);
i--;
duk_push_number(ctx, ((double) i) + ((double) nargs)); /* k+argCount-1; note that may be above 32-bit range */
if (duk_get_prop_index(ctx, -3, i)) {
/* fromPresent = true */
/* [ ... ToObject(this) ToUint32(length) to val ] */
duk_put_prop(ctx, -4); /* -> [ ... ToObject(this) ToUint32(length) ] */ /* FIXME: Throw */
} else {
/* fromPresent = false */
/* [ ... ToObject(this) ToUint32(length) to val ] */
duk_pop(ctx);
duk_del_prop(ctx, -3); /* -> [ ... ToObject(this) ToUint32(length) ] */ /* FIXME: Throw */
}
DUK_ASSERT_TOP(ctx, nargs + 2);
}
for (i = 0; i < nargs; i++) {
DUK_ASSERT_TOP(ctx, nargs + 2);
duk_dup(ctx, i); /* -> [ ... ToObject(this) ToUint32(length) arg[i] ] */
duk_put_prop_index(ctx, -3, i); /* FIXME: Throw */
DUK_ASSERT_TOP(ctx, nargs + 2);
}
DUK_ASSERT_TOP(ctx, nargs + 2);
final_len = ((double) len) + ((double) nargs);
duk_push_number(ctx, final_len);
duk_dup_top(ctx); /* -> [ ... ToObject(this) ToUint32(length) final_len final_len ] */
duk_put_prop_stridx(ctx, -4, DUK_STRIDX_LENGTH); /* FIXME: Throw */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_pop(duk_context *ctx) {
duk_uint32_t len;
duk_uint32_t idx;
DUK_ASSERT_TOP(ctx, 0);
len = duk__push_this_obj_len_u32(ctx);
if (len == 0) {
duk_push_int(ctx, 0);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH);
return 0;
}
idx = len - 1;
duk_get_prop_index(ctx, 0, (duk_uarridx_t) idx);
duk_del_prop_index(ctx, 0, (duk_uarridx_t) idx);
duk_push_u32(ctx, idx);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH);
return 1;
}
int duk_bi_array_prototype_pop(duk_context *ctx) {
unsigned int len;
unsigned int idx;
DUK_ASSERT_TOP(ctx, 0);
len = duk__push_this_obj_len_u32(ctx);
if (len == 0) {
duk_push_int(ctx, 0);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH); /* FIXME: Throw */
return 0;
}
idx = len - 1;
duk_get_prop_index(ctx, 0, idx);
duk_del_prop_index(ctx, 0, idx); /* FIXME: Throw */
duk_push_int(ctx, idx); /* FIXME: unsigned */
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH); /* FIXME: Throw */
return 1;
}
duk_ret_t duk_bi_object_prototype_is_prototype_of(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h_v;
duk_hobject *h_obj;
DUK_ASSERT_TOP(ctx, 1);
h_v = duk_get_hobject(ctx, 0);
if (!h_v) {
duk_push_false(ctx); /* XXX: tail call: return duk_push_false(ctx) */
return 1;
}
h_obj = duk_push_this_coercible_to_object(ctx);
DUK_ASSERT(h_obj != NULL);
/* E5.1 Section 15.2.4.6, step 3.a, lookup proto once before compare */
duk_push_boolean(ctx, duk_hobject_prototype_chain_contains(thr, h_v->prototype, h_obj));
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_prototype_is_prototype_of(duk_hthread *thr) {
duk_hobject *h_v;
duk_hobject *h_obj;
DUK_ASSERT_TOP(thr, 1);
h_v = duk_get_hobject(thr, 0);
if (!h_v) {
duk_push_false(thr); /* XXX: tail call: return duk_push_false(thr) */
return 1;
}
h_obj = duk_push_this_coercible_to_object(thr);
DUK_ASSERT(h_obj != NULL);
/* E5.1 Section 15.2.4.6, step 3.a, lookup proto once before compare.
* Prototype loops should cause an error to be thrown.
*/
duk_push_boolean(thr, duk_hobject_prototype_chain_contains(thr, DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_v), h_obj, 0 /*ignore_loop*/));
return 1;
}