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39 | #ifndef QV4JSCALL_H |
40 | #define QV4JSCALL_H |
41 | |
42 | // |
43 | // W A R N I N G |
44 | // ------------- |
45 | // |
46 | // This file is not part of the Qt API. It exists purely as an |
47 | // implementation detail. This header file may change from version to |
48 | // version without notice, or even be removed. |
49 | // |
50 | // We mean it. |
51 | // |
52 | |
53 | #include "qv4object_p.h" |
54 | #include "qv4function_p.h" |
55 | #include "qv4functionobject_p.h" |
56 | #include "qv4context_p.h" |
57 | #include "qv4scopedvalue_p.h" |
58 | #include "qv4stackframe_p.h" |
59 | |
60 | QT_BEGIN_NAMESPACE |
61 | |
62 | namespace QV4 { |
63 | |
64 | struct JSCallData { |
65 | JSCallData(const Scope &scope, int argc = 0, const Value *argv = nullptr, const Value *thisObject = nullptr) |
66 | : scope(scope), argc(argc) |
67 | { |
68 | if (thisObject) |
69 | this->thisObject = const_cast<Value *>(thisObject); |
70 | else |
71 | this->thisObject = scope.alloc(); |
72 | if (argv) |
73 | this->args = const_cast<Value *>(argv); |
74 | else |
75 | this->args = scope.alloc(nValues: argc); |
76 | } |
77 | |
78 | JSCallData *operator->() { |
79 | return this; |
80 | } |
81 | |
82 | CallData *callData(const FunctionObject *f = nullptr) const { |
83 | int size = int(offsetof(QV4::CallData, args)/sizeof(QV4::Value)) + argc; |
84 | CallData *ptr = reinterpret_cast<CallData *>(scope.alloc<Scope::Uninitialized>(nValues: size)); |
85 | ptr->function = Encode::undefined(); |
86 | ptr->context = Encode::undefined(); |
87 | ptr->accumulator = Encode::undefined(); |
88 | ptr->thisObject = thisObject->asReturnedValue(); |
89 | ptr->newTarget = Encode::undefined(); |
90 | ptr->setArgc(argc); |
91 | if (argc) |
92 | memcpy(dest: ptr->args, src: args, n: argc*sizeof(Value)); |
93 | if (f) |
94 | ptr->function = f->asReturnedValue(); |
95 | return ptr; |
96 | } |
97 | const Scope &scope; |
98 | int argc; |
99 | Value *args; |
100 | Value *thisObject; |
101 | }; |
102 | |
103 | inline |
104 | ReturnedValue FunctionObject::callAsConstructor(const JSCallData &data) const |
105 | { |
106 | return callAsConstructor(argv: data.args, argc: data.argc, newTarget: this); |
107 | } |
108 | |
109 | inline |
110 | ReturnedValue FunctionObject::call(const JSCallData &data) const |
111 | { |
112 | return call(thisObject: data.thisObject, argv: data.args, argc: data.argc); |
113 | } |
114 | |
115 | |
116 | struct ScopedStackFrame { |
117 | Scope &scope; |
118 | CppStackFrame frame; |
119 | |
120 | ScopedStackFrame(Scope &scope, Heap::ExecutionContext *context) |
121 | : scope(scope) |
122 | { |
123 | frame.parent = scope.engine->currentStackFrame; |
124 | if (!context) |
125 | return; |
126 | frame.jsFrame = reinterpret_cast<CallData *>(scope.alloc(nValues: sizeof(CallData)/sizeof(Value))); |
127 | frame.jsFrame->context = context; |
128 | frame.v4Function = frame.parent ? frame.parent->v4Function : nullptr; |
129 | scope.engine->currentStackFrame = &frame; |
130 | } |
131 | ~ScopedStackFrame() { |
132 | scope.engine->currentStackFrame = frame.parent; |
133 | } |
134 | }; |
135 | |
136 | } |
137 | |
138 | QT_END_NAMESPACE |
139 | |
140 | #endif // QV4JSCALL_H |
141 | |