1963659e3f248c8ae39bdb5933a29e67b66984f4
[WebKit.git] / Source / JavaScriptCore / runtime / WeakMapConstructor.cpp
1 /*
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6  * are met:
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8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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24  */
25
26 #include "config.h"
27 #include "WeakMapConstructor.h"
28
29 #include "Error.h"
30 #include "IteratorOperations.h"
31 #include "JSCInlines.h"
32 #include "JSGlobalObject.h"
33 #include "JSObjectInlines.h"
34 #include "JSWeakMap.h"
35 #include "WeakMapPrototype.h"
36
37 namespace JSC {
38
39 const ClassInfo WeakMapConstructor::s_info = { "Function", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(WeakMapConstructor) };
40
41 void WeakMapConstructor::finishCreation(VM& vm, WeakMapPrototype* prototype)
42 {
43     Base::finishCreation(vm, prototype->classInfo(vm)->className);
44     putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
45     putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(0), PropertyAttribute::DontEnum | PropertyAttribute::ReadOnly);
46 }
47
48 static EncodedJSValue JSC_HOST_CALL callWeakMap(ExecState*);
49 static EncodedJSValue JSC_HOST_CALL constructWeakMap(ExecState*);
50
51 WeakMapConstructor::WeakMapConstructor(VM& vm, Structure* structure)
52     : Base(vm, structure, callWeakMap, constructWeakMap)
53 {
54 }
55
56 static EncodedJSValue JSC_HOST_CALL callWeakMap(ExecState* exec)
57 {
58     VM& vm = exec->vm();
59     auto scope = DECLARE_THROW_SCOPE(vm);
60     return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(exec, scope, "WeakMap"));
61 }
62
63 static EncodedJSValue JSC_HOST_CALL constructWeakMap(ExecState* exec)
64 {
65     VM& vm = exec->vm();
66     auto scope = DECLARE_THROW_SCOPE(vm);
67
68     JSGlobalObject* globalObject = jsCast<InternalFunction*>(exec->jsCallee())->globalObject();
69     Structure* weakMapStructure = InternalFunction::createSubclassStructure(exec, exec->newTarget(), globalObject->weakMapStructure());
70     RETURN_IF_EXCEPTION(scope, encodedJSValue());
71     JSWeakMap* weakMap = JSWeakMap::create(vm, weakMapStructure);
72     JSValue iterable = exec->argument(0);
73     if (iterable.isUndefinedOrNull())
74         return JSValue::encode(weakMap);
75
76     JSValue adderFunction = weakMap->JSObject::get(exec, vm.propertyNames->set);
77     RETURN_IF_EXCEPTION(scope, encodedJSValue());
78
79     CallData adderFunctionCallData;
80     CallType adderFunctionCallType = getCallData(adderFunction, adderFunctionCallData);
81     if (adderFunctionCallType == CallType::None)
82         return JSValue::encode(throwTypeError(exec, scope));
83
84     scope.release();
85     forEachInIterable(exec, iterable, [&](VM& vm, ExecState* exec, JSValue nextItem) {
86         auto scope = DECLARE_THROW_SCOPE(vm);
87         if (!nextItem.isObject()) {
88             throwTypeError(exec, scope);
89             return;
90         }
91
92         JSValue key = nextItem.get(exec, static_cast<unsigned>(0));
93         RETURN_IF_EXCEPTION(scope, void());
94
95         JSValue value = nextItem.get(exec, static_cast<unsigned>(1));
96         RETURN_IF_EXCEPTION(scope, void());
97
98         MarkedArgumentBuffer arguments;
99         arguments.append(key);
100         arguments.append(value);
101         ASSERT(!arguments.hasOverflowed());
102         scope.release();
103         call(exec, adderFunction, adderFunctionCallType, adderFunctionCallData, weakMap, arguments);
104     });
105
106     return JSValue::encode(weakMap);
107 }
108
109 }