Esempio n. 1
0
DUK_INTERNAL duk_ret_t duk_bi_string_constructor(duk_context *ctx) {
	/* String constructor needs to distinguish between an argument not given at all
	 * vs. given as 'undefined'.  We're a vararg function to handle this properly.
	 */

	if (duk_get_top(ctx) == 0) {
		duk_push_hstring_stridx(ctx, DUK_STRIDX_EMPTY_STRING);
	} else {
		duk_to_string(ctx, 0);
	}
	DUK_ASSERT(duk_is_string(ctx, 0));
	duk_set_top(ctx, 1);

	if (duk_is_constructor_call(ctx)) {
		duk_push_object_helper(ctx,
		                       DUK_HOBJECT_FLAG_EXTENSIBLE |
		                       DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ |
		                       DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_STRING),
		                       DUK_BIDX_STRING_PROTOTYPE);

		/* String object internal value is immutable */
		duk_dup(ctx, 0);
		duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
	}
	/* Note: unbalanced stack on purpose */

	return 1;
}
Esempio n. 2
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DUK_INTERNAL duk_ret_t duk_bi_object_constructor(duk_context *ctx) {
	if (!duk_is_constructor_call(ctx) &&
	    !duk_is_null_or_undefined(ctx, 0)) {
		duk_to_object(ctx, 0);
		return 1;
	}

	if (duk_is_object(ctx, 0)) {
		return 1;
	}

	/* Pointer and buffer primitive values are treated like other
	 * primitives values which have a fully fledged object counterpart:
	 * promote to an object value.  Lightfuncs are coerced with
	 * ToObject() even they could also be returned as is.
	 */
	if (duk_check_type_mask(ctx, 0, DUK_TYPE_MASK_STRING |
	                                DUK_TYPE_MASK_BOOLEAN |
	                                DUK_TYPE_MASK_NUMBER |
	                                DUK_TYPE_MASK_POINTER |
	                                DUK_TYPE_MASK_BUFFER |
	                                DUK_TYPE_MASK_LIGHTFUNC)) {
		duk_to_object(ctx, 0);
		return 1;
	}

	duk_push_object_helper(ctx,
	                       DUK_HOBJECT_FLAG_EXTENSIBLE |
	                       DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
	                       DUK_BIDX_OBJECT_PROTOTYPE);
	return 1;
}
Esempio n. 3
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int duk_bi_pointer_constructor(duk_context *ctx) {
	/* FIXME: 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(ctx) == 0) {
		duk_push_pointer(ctx, NULL);
	} else {
		duk_to_pointer(ctx, 0);
	}
	DUK_ASSERT(duk_is_pointer(ctx, 0));
	duk_set_top(ctx, 1);

	if (duk_is_constructor_call(ctx)) {
		duk_push_object_helper(ctx,
		                       DUK_HOBJECT_FLAG_EXTENSIBLE |
		                       DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_POINTER),
		                       DUK_BIDX_POINTER_PROTOTYPE);

		/* Pointer object internal value is immutable */
		duk_dup(ctx, 0);
		duk_def_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
	}
	/* Note: unbalanced stack on purpose */

	return 1;
}
int duk_builtin_object_constructor(duk_context *ctx) {
	if (!duk_is_constructor_call(ctx) &&
	    !duk_is_null_or_undefined(ctx, 0)) {
		duk_to_object(ctx, 0);
		return 1;
	}

	if (duk_is_object(ctx, 0)) {
		return 1;
	}

	if (duk_check_type_mask(ctx, 0, DUK_TYPE_MASK_STRING |
	                                DUK_TYPE_MASK_BOOLEAN |
	                                DUK_TYPE_MASK_NUMBER)) {
		duk_to_object(ctx, 0);
		return 1;
	}

	/* FIXME: handling for POINTER and BUFFER */

	duk_push_object_helper(ctx,
	                       DUK_HOBJECT_FLAG_EXTENSIBLE |
	                       DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
	                       DUK_BIDX_OBJECT_PROTOTYPE);
	return 1;
}
Esempio n. 5
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duk_ret_t JsLibrarian::Constructor(duk_context* duktapeContext)
{
   try {
      if (duk_get_top(duktapeContext) != 0) JavaScriptHelper::Throw(duktapeContext, "No arguments for Librarian constructor expected");

      if (duk_is_constructor_call(duktapeContext)) duk_push_this(duktapeContext);
      else duk_push_object(duktapeContext);

      duk_push_pointer(duktapeContext, new JsLibrarian);
      duk_put_prop_string(duktapeContext, -2, "__Ptr");

      duk_push_c_function(duktapeContext, JsLibrarian::Destructor, 1);
      duk_set_finalizer(duktapeContext, -2);

      duk_push_c_function(duktapeContext, JsLibrarian::Files, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Files");

      duk_push_c_function(duktapeContext, JsLibrarian::DependencyCheck, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "DependencyCheck");

      duk_push_c_function(duktapeContext, JsLibrarian::Output, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Output");

      duk_push_c_function(duktapeContext, JsLibrarian::BeforeLink, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "BeforeLink");

      duk_push_c_function(duktapeContext, JsLibrarian::Create, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Create");

      return 1;
   }
   catch (std::exception& e) {
      JavaScriptHelper::Throw(duktapeContext, e.what());
   }
}
Esempio n. 6
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static duk_ret_t my_func_2(duk_context *ctx) {
	printf("duk_is_constructor_call: %d\n", (int) duk_is_constructor_call(ctx));

	/* this replaces the freshly constructed object, and does NOT have
	 * the same internal prototype as the fresh object.
	 */
	duk_eval_string(ctx, "({ name: 'replacement' })");
	return 1;
}
Esempio n. 7
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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 */
}
Esempio n. 8
0
/* Constructor */
DUK_INTERNAL duk_ret_t duk_bi_logger_constructor(duk_context *ctx) {
	duk_hthread *thr = (duk_hthread *) ctx;
	duk_idx_t nargs;

	/* Calling as a non-constructor is not meaningful. */
	if (!duk_is_constructor_call(ctx)) {
		return DUK_RET_TYPE_ERROR;
	}

	nargs = duk_get_top(ctx);
	duk_set_top(ctx, 1);

	duk_push_this(ctx);

	/* [ name this ] */

	if (nargs == 0) {
		/* Automatic defaulting of logger name from caller.  This would
		 * work poorly with tail calls, but constructor calls are currently
		 * never tail calls, so tail calls are not an issue now.
		 */

		if (thr->callstack_top >= 2) {
			duk_activation *act_caller = thr->callstack + thr->callstack_top - 2;
			duk_hobject *func_caller;

			func_caller = DUK_ACT_GET_FUNC(act_caller);
			if (func_caller) {
				/* Stripping the filename might be a good idea
				 * ("/foo/bar/quux.js" -> logger name "quux"),
				 * but now used verbatim.
				 */
				duk_push_hobject(ctx, func_caller);
				duk_get_prop_stridx(ctx, -1, DUK_STRIDX_FILE_NAME);
				duk_replace(ctx, 0);
			}
		}
	}
	/* the stack is unbalanced here on purpose; we only rely on the
	 * initial two values: [ name this ].
	 */

	if (duk_is_string(ctx, 0)) {
		duk_dup(ctx, 0);
		duk_put_prop_stridx(ctx, 1, DUK_STRIDX_LC_N);
	} else {
		/* don't set 'n' at all, inherited value is used as name */
	}

	duk_compact(ctx, 1);

	return 0;  /* keep default instance */
}
Esempio n. 9
0
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 */
}
Esempio n. 10
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int duk_builtin_date_constructor(duk_context *ctx) {
	int nargs = duk_get_top(ctx);
	int is_cons = duk_is_constructor_call(ctx);
	double dparts[NUM_PARTS];
	double d;

	DUK_DDDPRINT("Date constructor, nargs=%d, is_cons=%d", nargs, is_cons);

	duk_push_object_helper(ctx,
	                       DUK_HOBJECT_FLAG_EXTENSIBLE |
	                       DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DATE),
	                       DUK_BIDX_DATE_PROTOTYPE);

	/* Unlike most built-ins, the internal [[PrimitiveValue]] of a Date
	 * is mutable.
	 */

	if (nargs == 0 || !is_cons) {
		d = timeclip(GET_NOW_TIMEVAL(ctx));
		duk_push_number(ctx, d);
		duk_def_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_W);
		if (!is_cons) {
			/* called as a normal function: return new Date().toString() */
			duk_to_string(ctx, -1);
		}
		return 1;
	} else if (nargs == 1) {
		duk_to_primitive(ctx, 0, DUK_HINT_NONE);
		if (duk_is_string(ctx, 0)) {
			parse_string(ctx, duk_to_string(ctx, 0));
			duk_replace(ctx, 0);  /* may be NaN */
		}
		d = timeclip(duk_to_number(ctx, 0));
		duk_push_number(ctx, d);
		duk_def_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_W);
		return 1;
	}

	set_parts_from_args(ctx, dparts, nargs);

	/* Parts are in local time, convert when setting. */

	set_this_timeval_from_dparts(ctx, dparts, FLAG_LOCALTIME /*flags*/);  /* -> [ ... this timeval ] */
	duk_pop(ctx);  /* -> [ ... this ] */
	return 1;
}
Esempio n. 11
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static duk_ret_t my_func_1(duk_context *ctx) {
	printf("duk_is_constructor_call: %d\n", (int) duk_is_constructor_call(ctx));

	/* check 'this'; it should have internal prototype set below to
	 * constructor's "prototype" property.
	 */
	duk_push_this(ctx);
	duk_push_string(ctx, "own_value");
	duk_put_prop_string(ctx, -2, "own_key");
	duk_enum(ctx, -1, 0 /*enum_flags*/);
	while (duk_next(ctx, -1, 1 /*get_value*/)) {
		printf("key='%s', value='%s'\n", duk_to_string(ctx, -2), duk_to_string(ctx, -1));
		duk_pop_2(ctx);
	}
	duk_pop(ctx);
	duk_pop(ctx);

	return 0;
}
Esempio n. 12
0
duk_ret_t duk_bi_boolean_constructor(duk_context *ctx) {
	duk_hobject *h_this;

	duk_to_boolean(ctx, 0);

	if (duk_is_constructor_call(ctx)) {
		/* FIXME: helper; rely on Boolean.prototype as being non-writable, non-configurable */
		duk_push_this(ctx);
		h_this = duk_get_hobject(ctx, -1);
		DUK_ASSERT(h_this != NULL);
		DUK_ASSERT(h_this->prototype == ((duk_hthread *) ctx)->builtins[DUK_BIDX_BOOLEAN_PROTOTYPE]);

		DUK_HOBJECT_SET_CLASS_NUMBER(h_this, DUK_HOBJECT_CLASS_BOOLEAN);

		duk_dup(ctx, 0);  /* -> [ val obj val ] */
		duk_def_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);  /* FIXME: proper flags? */
	}  /* unbalanced stack */

	return 1;
}
Esempio n. 13
0
DUK_INTERNAL duk_ret_t duk_bi_error_constructor_shared(duk_context *ctx) {
	/* Behavior for constructor and non-constructor call is
	 * the same except for augmenting the created error.  When
	 * called as a constructor, the caller (duk_new()) will handle
	 * augmentation; when called as normal function, we need to do
	 * it here.
	 */

	duk_hthread *thr = (duk_hthread *) ctx;
	duk_small_int_t bidx_prototype = duk_get_current_magic(ctx);

	/* same for both error and each subclass like TypeError */
	duk_uint_t flags_and_class = DUK_HOBJECT_FLAG_EXTENSIBLE |
	                             DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ERROR);

	DUK_UNREF(thr);

	duk_push_object_helper(ctx, flags_and_class, bidx_prototype);

	/* If message is undefined, the own property 'message' is not set at
	 * all to save property space.  An empty message is inherited anyway.
	 */
	if (!duk_is_undefined(ctx, 0)) {
		duk_to_string(ctx, 0);
		duk_dup_0(ctx);  /* [ message error message ] */
		duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_MESSAGE, DUK_PROPDESC_FLAGS_WC);
	}

	/* Augment the error if called as a normal function.  __FILE__ and __LINE__
	 * are not desirable in this case.
	 */

#ifdef DUK_USE_AUGMENT_ERROR_CREATE
	if (!duk_is_constructor_call(ctx)) {
		duk_err_augment_error_create(thr, thr, NULL, 0, 1 /*noblame_fileline*/);
	}
#endif

	return 1;
}
Esempio n. 14
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DUK_INTERNAL duk_ret_t duk_bi_object_constructor(duk_hthread *thr) {
	duk_uint_t arg_mask;

	arg_mask = duk_get_type_mask(thr, 0);

	if (!duk_is_constructor_call(thr) &&  /* not a constructor call */
	    ((arg_mask & (DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_UNDEFINED)) == 0)) {  /* and argument not null or undefined */
		duk_to_object(thr, 0);
		return 1;
	}

	/* Pointer and buffer primitive values are treated like other
	 * primitives values which have a fully fledged object counterpart:
	 * promote to an object value.  Lightfuncs and plain buffers are
	 * coerced with ToObject() even they could also be returned as is.
	 */
	if (arg_mask & (DUK_TYPE_MASK_OBJECT |
	                DUK_TYPE_MASK_STRING |
	                DUK_TYPE_MASK_BOOLEAN |
	                DUK_TYPE_MASK_NUMBER |
	                DUK_TYPE_MASK_POINTER |
	                DUK_TYPE_MASK_BUFFER |
	                DUK_TYPE_MASK_LIGHTFUNC)) {
		/* For DUK_TYPE_OBJECT the coercion is a no-op and could
		 * be checked for explicitly, but Object(obj) calls are
		 * not very common so opt for minimal footprint.
		 */
		duk_to_object(thr, 0);
		return 1;
	}

	(void) duk_push_object_helper(thr,
	                              DUK_HOBJECT_FLAG_EXTENSIBLE |
	                              DUK_HOBJECT_FLAG_FASTREFS |
	                              DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
	                              DUK_BIDX_OBJECT_PROTOTYPE);
	return 1;
}
Esempio n. 15
0
int duk_bi_buffer_constructor(duk_context *ctx) {
	if (duk_get_top(ctx) == 0) {
		(void) duk_push_fixed_buffer(ctx, 0);
	} else {
		duk_to_buffer(ctx, 0, NULL);
	}
	DUK_ASSERT(duk_is_buffer(ctx, 0));
	duk_set_top(ctx, 1);

	if (duk_is_constructor_call(ctx)) {
		duk_push_object_helper(ctx,
		                       DUK_HOBJECT_FLAG_EXTENSIBLE |
		                       DUK_HOBJECT_FLAG_SPECIAL_BUFFEROBJ |
		                       DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_BUFFER),
		                       DUK_BIDX_BUFFER_PROTOTYPE);

		/* Buffer object internal value is immutable */
		duk_dup(ctx, 0);
		duk_def_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
	}
	/* Note: unbalanced stack on purpose */

	return 1;
}
Esempio n. 16
0
int my_func(duk_context *ctx) {
	printf("duk_is_constructor_call: %d\n", duk_is_constructor_call(ctx));
	return 0;
}
Esempio n. 17
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int duk_bi_buffer_constructor(duk_context *ctx) {
	duk_size_t buf_size;
	duk_small_int_t buf_dynamic;
	duk_uint8_t *buf_data;
	const duk_uint8_t *src_data;
	duk_hobject *h_obj;

	/*
	 *  Constructor arguments are currently somewhat compatible with
	 *  (keep it that way if possible):
	 *
	 *    http://nodejs.org/api/buffer.html
	 *
	 */

	buf_dynamic = duk_get_boolean(ctx, 1);  /* default to false */

	switch (duk_get_type(ctx, 0)) {
	case DUK_TYPE_NUMBER:
		/* new buffer of specified size */
		buf_size = (duk_size_t) duk_to_int(ctx, 0);
		(void) duk_push_buffer(ctx, buf_size, buf_dynamic);
		break;
	case DUK_TYPE_BUFFER:
		/* return input buffer, converted to a Buffer object if called as a
		 * constructor (no change if called as a function).
		 */
		duk_set_top(ctx, 1);
		break;
	case DUK_TYPE_STRING:
		/* new buffer with string contents */
		src_data = (const duk_uint8_t *) duk_get_lstring(ctx, 0, &buf_size);
		DUK_ASSERT(src_data != NULL);  /* even for zero-length string */
		buf_data = (duk_uint8_t *) duk_push_buffer(ctx, buf_size, buf_dynamic);
		DUK_MEMCPY((void *) buf_data, (const void *) src_data, (size_t) buf_size);
		break;
	case DUK_TYPE_OBJECT:
		/* Buffer object: get the plain buffer inside.  If called as as
		 * constructor, a new Buffer object pointing to the same plain
		 * buffer is created below.
		 */
		h_obj = duk_get_hobject(ctx, 0);
		DUK_ASSERT(h_obj != NULL);
		if (DUK_HOBJECT_GET_CLASS_NUMBER(h_obj) != DUK_HOBJECT_CLASS_BUFFER) {
			return DUK_RET_TYPE_ERROR;
		}
		duk_get_prop_stridx(ctx, 0, DUK_STRIDX_INT_VALUE);
		DUK_ASSERT(duk_is_buffer(ctx, -1));
		break;
	case DUK_TYPE_NONE:
	default:
		return DUK_RET_TYPE_ERROR;
	}

	/* stack is unbalanced, but: [ <something> buf ] */

	if (duk_is_constructor_call(ctx)) {
		duk_push_object_helper(ctx,
		                       DUK_HOBJECT_FLAG_EXTENSIBLE |
		                       DUK_HOBJECT_FLAG_EXOTIC_BUFFEROBJ |
		                       DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_BUFFER),
		                       DUK_BIDX_BUFFER_PROTOTYPE);

		/* Buffer object internal value is immutable */
		duk_dup(ctx, -2);
		duk_def_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
	}
	/* Note: unbalanced stack on purpose */

	return 1;
}
Esempio n. 18
0
/* XXX: much to improve (code size) */
DUK_INTERNAL duk_ret_t duk_bi_regexp_constructor(duk_hthread *thr) {
	duk_hobject *h_pattern;

	DUK_ASSERT_TOP(thr, 2);
	h_pattern = duk_get_hobject(thr, 0);

	if (!duk_is_constructor_call(thr) &&
	    h_pattern != NULL &&
	    DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP &&
	    duk_is_undefined(thr, 1)) {
		/* Called as a function, pattern has [[Class]] "RegExp" and
		 * flags is undefined -> return object as is.
		 */
		/* XXX: ES2015 has a NewTarget SameValue() check which is not
		 * yet implemented.
		 */
		duk_dup_0(thr);
		return 1;
	}

	/* Else functionality is identical for function call and constructor
	 * call.
	 */

	if (h_pattern != NULL &&
	    DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP) {
		duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_SOURCE);
		if (duk_is_undefined(thr, 1)) {
			/* In ES5 one would need to read the flags individually;
			 * in ES2015 just read .flags.
			 */
			duk_get_prop_stridx(thr, 0, DUK_STRIDX_FLAGS);
		} else {
			/* In ES2015 allowed; overrides argument RegExp flags. */
			duk_dup_1(thr);
		}
	} else {
		if (duk_is_undefined(thr, 0)) {
			duk_push_hstring_empty(thr);
		} else {
			duk_dup_0(thr);
			duk_to_string(thr, -1);  /* Rejects Symbols. */
		}
		if (duk_is_undefined(thr, 1)) {
			duk_push_hstring_empty(thr);
		} else {
			duk_dup_1(thr);
			duk_to_string(thr, -1);  /* Rejects Symbols. */
		}

		/* [ ... pattern flags ] */
	}

	DUK_DDD(DUK_DDDPRINT("RegExp constructor/function call, pattern=%!T, flags=%!T",
	                     (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1)));

	/* [ ... pattern flags ] (both uncoerced) */

	duk_to_string(thr, -2);
	duk_to_string(thr, -1);
	duk_regexp_compile(thr);

	/* [ ... bytecode escaped_source ] */

	duk_regexp_create_instance(thr);

	/* [ ... RegExp ] */

	return 1;
}
//duk_bool_t duk_is_constructor_call(duk_context *ctx);
duk_bool_t aperl_duk_is_constructor_call(duk_context *ctx) {
	duk_bool_t ret = duk_is_constructor_call(ctx);
	return ret;
}
Esempio n. 20
0
/* XXX: Make this obsolete by adding a function flag for rejecting a
 * non-constructor call automatically?
 */
DUK_INTERNAL void duk_require_constructor_call(duk_context *ctx) {
	if (!duk_is_constructor_call(ctx)) {
		DUK_ERROR_TYPE((duk_hthread *) ctx, DUK_STR_CONSTRUCT_ONLY);
	}
}
Esempio n. 21
0
bool Context::isConstructorCall()
{
    return (duk_is_constructor_call(m_handle) ? true: false);
}
Esempio n. 22
0
/* XXX: much to improve (code size) */
DUK_INTERNAL duk_ret_t duk_bi_regexp_constructor(duk_context *ctx) {
	duk_hthread *thr = (duk_hthread *) ctx;
	duk_hobject *h_pattern;

	DUK_ASSERT_TOP(ctx, 2);
	h_pattern = duk_get_hobject(ctx, 0);

	if (!duk_is_constructor_call(ctx) &&
	    h_pattern != NULL &&
	    DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP &&
	    duk_is_undefined(ctx, 1)) {
		/* Called as a function, pattern has [[Class]] "RegExp" and
		 * flags is undefined -> return object as is.
		 */
		duk_dup(ctx, 0);
		return 1;
	}

	/* Else functionality is identical for function call and constructor
	 * call.
	 */

	if (h_pattern != NULL &&
	    DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP) {
		if (duk_is_undefined(ctx, 1)) {
			duk_bool_t flag_g, flag_i, flag_m;
			duk_get_prop_stridx(ctx, 0, DUK_STRIDX_SOURCE);
			flag_g = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_GLOBAL, NULL);
			flag_i = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_IGNORE_CASE, NULL);
			flag_m = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_MULTILINE, NULL);

			duk_push_sprintf(ctx, "%s%s%s",
			                 (const char *) (flag_g ? "g" : ""),
			                 (const char *) (flag_i ? "i" : ""),
			                 (const char *) (flag_m ? "m" : ""));

			/* [ ... pattern flags ] */
		} else {
			return DUK_RET_TYPE_ERROR;
		}
	} else {
		if (duk_is_undefined(ctx, 0)) {
			duk_push_string(ctx, "");
		} else {
			duk_dup(ctx, 0);
			duk_to_string(ctx, -1);
		}
		if (duk_is_undefined(ctx, 1)) {
			duk_push_string(ctx, "");
		} else {
			duk_dup(ctx, 1);
			duk_to_string(ctx, -1);
		}

		/* [ ... pattern flags ] */
	}

	DUK_DDD(DUK_DDDPRINT("RegExp constructor/function call, pattern=%!T, flags=%!T",
	                     (duk_tval *) duk_get_tval(ctx, -2), (duk_tval *) duk_get_tval(ctx, -1)));

	/* [ ... pattern flags ] */

	duk_regexp_compile(thr);

	/* [ ... bytecode escaped_source ] */

	duk_regexp_create_instance(thr);

	/* [ ... RegExp ] */

	return 1;
}
Esempio n. 23
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duk_ret_t JsExe::Constructor(duk_context* duktapeContext)
{
   try {
      if (duk_get_top(duktapeContext) != 0) JavaScriptHelper::Throw(duktapeContext, "No arguments for Exe/Dll constructor expected");

      if (duk_is_constructor_call(duktapeContext)) duk_push_this(duktapeContext);
      else duk_push_object(duktapeContext);

      duk_push_pointer(duktapeContext, new JsExe);
      duk_put_prop_string(duktapeContext, -2, "__Ptr");

      duk_push_c_function(duktapeContext, JsExe::Destructor, 1);
      duk_set_finalizer(duktapeContext, -2);

      duk_push_c_function(duktapeContext, JsExe::Build, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Build");

      duk_push_c_function(duktapeContext, JsExe::Files, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Files");

      duk_push_c_function(duktapeContext, JsExe::DependencyCheck, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "DependencyCheck");

      duk_push_c_function(duktapeContext, JsExe::CRT, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "CRT");

      duk_push_c_function(duktapeContext, JsExe::ObjDir, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "ObjDir");

      duk_push_c_function(duktapeContext, JsExe::Includes, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Includes");

      duk_push_c_function(duktapeContext, JsExe::Defines, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Defines");

      duk_push_c_function(duktapeContext, JsExe::Threads, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Threads");

      duk_push_c_function(duktapeContext, JsExe::CompileArgs, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "CompileArgs");

      duk_push_c_function(duktapeContext, JsExe::CompileArgs, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Args");

      duk_push_c_function(duktapeContext, JsExe::PrecompiledHeader, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "PrecompiledHeader");

      duk_push_c_function(duktapeContext, JsExe::WarningLevel, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "WarningLevel");

      duk_push_c_function(duktapeContext, JsExe::WarningAsError, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "WarningAsError");

      duk_push_c_function(duktapeContext, JsExe::WarningDisable, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "WarningDisable");

      duk_push_c_function(duktapeContext, JsExe::Output, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Output");

      duk_push_c_function(duktapeContext, JsExe::LibPath, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "LibPath");

      duk_push_c_function(duktapeContext, JsExe::Libs, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Libs");

      duk_push_c_function(duktapeContext, JsExe::ImportLib, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "ImportLib");

      duk_push_c_function(duktapeContext, JsExe::Def, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Def");

      duk_push_c_function(duktapeContext, JsExe::LinkArgs, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "LinkArgs");

      duk_push_c_function(duktapeContext, JsExe::Res, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Res");

      duk_push_c_function(duktapeContext, JsExe::BeforeCompile, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "BeforeCompile");

      duk_push_c_function(duktapeContext, JsExe::BeforeLink, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "BeforeLink");

      duk_push_c_function(duktapeContext, JsExe::Create, DUK_VARARGS);
      duk_put_prop_string(duktapeContext, -2, "Create");

      return 1;
   }
   catch (std::exception& e) {
      JavaScriptHelper::Throw(duktapeContext, e.what());
   }
}
Esempio n. 24
0
static duk_ret_t test_func(duk_context *ctx, void *udata) {
	(void) udata;

	if (ctx) {
		printf("dummy - return here\n"); fflush(stdout);
		return 0;
	}

	/* Up-to-date for Duktape 1.3.0, alphabetical order:
	 * $ cd website/api; ls *.yaml
	 */

	(void) duk_alloc_raw(ctx, 0);
	(void) duk_alloc(ctx, 0);
	(void) duk_base64_decode(ctx, 0);
	(void) duk_base64_encode(ctx, 0);
	(void) duk_buffer_to_string(ctx, 0);
	(void) duk_call_method(ctx, 0);
	(void) duk_call_prop(ctx, 0, 0);
	(void) duk_call(ctx, 0);
	(void) duk_char_code_at(ctx, 0, 0);
	(void) duk_check_stack_top(ctx, 0);
	(void) duk_check_stack(ctx, 0);
	(void) duk_check_type_mask(ctx, 0, 0);
	(void) duk_check_type(ctx, 0, 0);
	(void) duk_compact(ctx, 0);
	(void) duk_compile_lstring_filename(ctx, 0, "dummy", 0);
	(void) duk_compile_lstring(ctx, 0, "dummy", 0);
	(void) duk_compile_string_filename(ctx, 0, "dummy");
	(void) duk_compile_string(ctx, 0, "dummy");
	(void) duk_compile(ctx, 0);
	(void) duk_concat(ctx, 0);
	(void) duk_config_buffer(ctx, 0, NULL, 0);
	(void) duk_copy(ctx, 0, 0);
	(void) duk_create_heap_default();
	(void) duk_create_heap(NULL, NULL, NULL, NULL, NULL);
	(void) duk_debugger_attach(ctx, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
	(void) duk_debugger_cooperate(ctx);
	(void) duk_debugger_detach(ctx);
	(void) duk_debugger_notify(ctx, 0);
	(void) duk_debugger_pause(ctx);
	(void) duk_decode_string(ctx, 0, NULL, NULL);
	(void) duk_def_prop(ctx, 0, 0);
	(void) duk_del_prop_index(ctx, 0, 0);
	(void) duk_del_prop_string(ctx, 0, "dummy");
	(void) duk_del_prop(ctx, 0);
	(void) duk_destroy_heap(ctx);
	(void) duk_dump_function(ctx);
	(void) duk_dup_top(ctx);
	(void) duk_dup(ctx, 0);
	(void) duk_enum(ctx, 0, 0);
	(void) duk_equals(ctx, 0, 0);
	duk_error_va(ctx, 0, NULL, NULL);
	duk_error(ctx, 0, "dummy");  /* (void) cast won't work without variadic macros */
	(void) duk_eval_lstring_noresult(ctx, "dummy", 0);
	(void) duk_eval_lstring(ctx, "dummy", 0);
	(void) duk_eval_noresult(ctx);
	(void) duk_eval_string_noresult(ctx, "dummy");
	(void) duk_eval_string(ctx, "dummy");
	(void) duk_eval(ctx);
	(void) duk_fatal(ctx, "dummy");
	(void) duk_free_raw(ctx, NULL);
	(void) duk_free(ctx, NULL);
	(void) duk_gc(ctx, 0);
	(void) duk_get_boolean(ctx, 0);
	(void) duk_get_buffer_data(ctx, 0, NULL);
	(void) duk_get_buffer(ctx, 0, NULL);
	(void) duk_get_c_function(ctx, 0);
	(void) duk_get_context(ctx, 0);
	(void) duk_get_current_magic(ctx);
	(void) duk_get_error_code(ctx, 0);
	(void) duk_get_finalizer(ctx, 0);
	(void) duk_get_global_string(ctx, 0);
	(void) duk_get_heapptr(ctx, 0);
	(void) duk_get_int(ctx, 0);
	(void) duk_get_length(ctx, 0);
	(void) duk_get_lstring(ctx, 0, NULL);
	(void) duk_get_magic(ctx, 0);
	(void) duk_get_memory_functions(ctx, NULL);
	(void) duk_get_number(ctx, 0);
	(void) duk_get_pointer(ctx, 0);
	(void) duk_get_prop_index(ctx, 0, 0);
	(void) duk_get_prop_string(ctx, 0, "dummy");
	(void) duk_get_prop(ctx, 0);
	(void) duk_get_prototype(ctx, 0);
	(void) duk_get_string(ctx, 0);
	(void) duk_get_top_index(ctx);
	(void) duk_get_top(ctx);
	(void) duk_get_type_mask(ctx, 0);
	(void) duk_get_type(ctx, 0);
	(void) duk_get_uint(ctx, 0);
	(void) duk_has_prop_index(ctx, 0, 0);
	(void) duk_has_prop_string(ctx, 0, "dummy");
	(void) duk_has_prop(ctx, 0);
	(void) duk_hex_decode(ctx, 0);
	(void) duk_hex_encode(ctx, 0);
	(void) duk_insert(ctx, 0);
	(void) duk_instanceof(ctx, 0, 0);
	(void) duk_is_array(ctx, 0);
	(void) duk_is_boolean(ctx, 0);
	(void) duk_is_bound_function(ctx, 0);
	(void) duk_is_buffer(ctx, 0);
	(void) duk_is_callable(ctx, 0);
	(void) duk_is_c_function(ctx, 0);
	(void) duk_is_constructor_call(ctx);
	(void) duk_is_dynamic_buffer(ctx, 0);
	(void) duk_is_ecmascript_function(ctx, 0);
	(void) duk_is_error(ctx, 0);
	(void) duk_is_eval_error(ctx, 0);
	(void) duk_is_fixed_buffer(ctx, 0);
	(void) duk_is_function(ctx, 0);
	(void) duk_is_lightfunc(ctx, 0);
	(void) duk_is_nan(ctx, 0);
	(void) duk_is_null_or_undefined(ctx, 0);
	(void) duk_is_null(ctx, 0);
	(void) duk_is_number(ctx, 0);
	(void) duk_is_object_coercible(ctx, 0);
	(void) duk_is_object(ctx, 0);
	(void) duk_is_pointer(ctx, 0);
	(void) duk_is_primitive(ctx, 0);
	(void) duk_is_range_error(ctx, 0);
	(void) duk_is_reference_error(ctx, 0);
	(void) duk_is_strict_call(ctx);
	(void) duk_is_string(ctx, 0);
	(void) duk_is_syntax_error(ctx, 0);
	(void) duk_is_thread(ctx, 0);
	(void) duk_is_type_error(ctx, 0);
	(void) duk_is_undefined(ctx, 0);
	(void) duk_is_uri_error(ctx, 0);
	(void) duk_is_valid_index(ctx, 0);
	(void) duk_join(ctx, 0);
	(void) duk_json_decode(ctx, 0);
	(void) duk_json_encode(ctx, 0);
	(void) duk_load_function(ctx);
	(void) duk_map_string(ctx, 0, NULL, NULL);
	(void) duk_new(ctx, 0);
	(void) duk_next(ctx, 0, 0);
	(void) duk_normalize_index(ctx, 0);
	(void) duk_pcall_method(ctx, 0);
	(void) duk_pcall_prop(ctx, 0, 0);
	(void) duk_pcall(ctx, 0);
	(void) duk_pcompile_lstring_filename(ctx, 0, "dummy", 0);
	(void) duk_pcompile_lstring(ctx, 0, "dummy", 0);
	(void) duk_pcompile_string_filename(ctx, 0, "dummy");
	(void) duk_pcompile_string(ctx, 0, "dummy");
	(void) duk_pcompile(ctx, 0);
	(void) duk_peval_lstring_noresult(ctx, "dummy", 0);
	(void) duk_peval_lstring(ctx, "dummy", 0);
	(void) duk_peval_noresult(ctx);
	(void) duk_peval_string_noresult(ctx, "dummy");
	(void) duk_peval_string(ctx, "dummy");
	(void) duk_peval(ctx);
	(void) duk_pnew(ctx, 0);
	(void) duk_pop_2(ctx);
	(void) duk_pop_3(ctx);
	(void) duk_pop_n(ctx, 0);
	(void) duk_pop(ctx);
	(void) duk_push_array(ctx);
	(void) duk_push_boolean(ctx, 0);
	(void) duk_push_buffer_object(ctx, 0, 0, 0, 0);
	(void) duk_push_buffer(ctx, 0, 0);
	(void) duk_push_c_function(ctx, NULL, 0);
	(void) duk_push_c_lightfunc(ctx, NULL, 0, 0, 0);
	(void) duk_push_context_dump(ctx);
	(void) duk_push_current_function(ctx);
	(void) duk_push_current_thread(ctx);
	(void) duk_push_dynamic_buffer(ctx, 0);
	(void) duk_push_error_object_va(ctx, 0, NULL, NULL);
	(void) duk_push_error_object(ctx, 0, "dummy");
	(void) duk_push_external_buffer(ctx);
	(void) duk_push_false(ctx);
	(void) duk_push_fixed_buffer(ctx, 0);
	(void) duk_push_global_object(ctx);
	(void) duk_push_global_stash(ctx);
	(void) duk_push_heap_stash(ctx);
	(void) duk_push_heapptr(ctx, NULL);
	(void) duk_push_int(ctx, 0);
	(void) duk_push_lstring(ctx, "dummy", 0);
	(void) duk_push_nan(ctx);
	(void) duk_push_null(ctx);
	(void) duk_push_number(ctx, 0.0);
	(void) duk_push_object(ctx);
	(void) duk_push_pointer(ctx, NULL);
	(void) duk_push_sprintf(ctx, "dummy");
	(void) duk_push_string(ctx, "dummy");
	(void) duk_push_this(ctx);
	(void) duk_push_thread_new_globalenv(ctx);
	(void) duk_push_thread_stash(ctx, NULL);
	(void) duk_push_thread(ctx);
	(void) duk_push_true(ctx);
	(void) duk_push_uint(ctx, 0);
	(void) duk_push_undefined(ctx);
	(void) duk_push_vsprintf(ctx, "dummy", NULL);
	(void) duk_put_function_list(ctx, 0, NULL);
	(void) duk_put_global_string(ctx, NULL);
	(void) duk_put_number_list(ctx, 0, NULL);
	(void) duk_put_prop_index(ctx, 0, 0);
	(void) duk_put_prop_string(ctx, 0, "dummy");
	(void) duk_put_prop(ctx, 0);
	(void) duk_realloc_raw(ctx, NULL, 0);
	(void) duk_realloc(ctx, NULL, 0);
	(void) duk_remove(ctx, 0);
	(void) duk_replace(ctx, 0);
	(void) duk_require_boolean(ctx, 0);
	(void) duk_require_buffer_data(ctx, 0, NULL);
	(void) duk_require_buffer(ctx, 0, NULL);
	(void) duk_require_c_function(ctx, 0);
	(void) duk_require_callable(ctx, 0);
	(void) duk_require_context(ctx, 0);
	(void) duk_require_function(ctx, 0);
	(void) duk_require_heapptr(ctx, 0);
	(void) duk_require_int(ctx, 0);
	(void) duk_require_lstring(ctx, 0, NULL);
	(void) duk_require_normalize_index(ctx, 0);
	(void) duk_require_null(ctx, 0);
	(void) duk_require_number(ctx, 0);
	(void) duk_require_object_coercible(ctx, 0);
	(void) duk_require_pointer(ctx, 0);
	(void) duk_require_stack_top(ctx, 0);
	(void) duk_require_stack(ctx, 0);
	(void) duk_require_string(ctx, 0);
	(void) duk_require_top_index(ctx);
	(void) duk_require_type_mask(ctx, 0, 0);
	(void) duk_require_uint(ctx, 0);
	(void) duk_require_undefined(ctx, 0);
	(void) duk_require_valid_index(ctx, 0);
	(void) duk_resize_buffer(ctx, 0, 0);
	(void) duk_safe_call(ctx, NULL, NULL, 0, 0);
	(void) duk_safe_to_lstring(ctx, 0, NULL);
	(void) duk_safe_to_string(ctx, 0);
	(void) duk_set_finalizer(ctx, 0);
	(void) duk_set_global_object(ctx);
	(void) duk_set_magic(ctx, 0, 0);
	(void) duk_set_prototype(ctx, 0);
	(void) duk_set_top(ctx, 0);
	(void) duk_steal_buffer(ctx, 0, NULL);
	(void) duk_strict_equals(ctx, 0, 0);
	(void) duk_substring(ctx, 0, 0, 0);
	(void) duk_swap_top(ctx, 0);
	(void) duk_swap(ctx, 0, 0);
	(void) duk_throw(ctx);
	(void) duk_to_boolean(ctx, 0);
	(void) duk_to_buffer(ctx, 0, NULL);
	(void) duk_to_defaultvalue(ctx, 0, 0);
	(void) duk_to_dynamic_buffer(ctx, 0, NULL);
	(void) duk_to_fixed_buffer(ctx, 0, NULL);
	(void) duk_to_int32(ctx, 0);
	(void) duk_to_int(ctx, 0);
	(void) duk_to_lstring(ctx, 0, NULL);
	(void) duk_to_null(ctx, 0);
	(void) duk_to_number(ctx, 0);
	(void) duk_to_object(ctx, 0);
	(void) duk_to_pointer(ctx, 0);
	(void) duk_to_primitive(ctx, 0, 0);
	(void) duk_to_string(ctx, 0);
	(void) duk_to_uint16(ctx, 0);
	(void) duk_to_uint32(ctx, 0);
	(void) duk_to_uint(ctx, 0);
	(void) duk_to_undefined(ctx, 0);
	(void) duk_trim(ctx, 0);
	(void) duk_xcopy_top(ctx, NULL, 0);
	(void) duk_xmove_top(ctx, NULL, 0);

	printf("never here\n"); fflush(stdout);
	return 0;
}
static duk_ret_t my_func(duk_context *ctx) {
	printf("duk_is_constructor_call: %d\n", (int) duk_is_constructor_call(ctx));
	return 0;
}