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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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56 template <class S> Handle<S> at(int index) { | 56 template <class S> Handle<S> at(int index) { |
57 Object** value = &((*this)[index]); | 57 Object** value = &((*this)[index]); |
58 // This cast checks that the object we're accessing does indeed have the | 58 // This cast checks that the object we're accessing does indeed have the |
59 // expected type. | 59 // expected type. |
60 S::cast(*value); | 60 S::cast(*value); |
61 return Handle<S>(reinterpret_cast<S**>(value)); | 61 return Handle<S>(reinterpret_cast<S**>(value)); |
62 } | 62 } |
63 | 63 |
64 // Get the total number of arguments including the receiver. | 64 // Get the total number of arguments including the receiver. |
65 int length() const { return length_; } | 65 int length() const { return length_; } |
66 | 66 |
67 Object** arguments() { return arguments_; } | 67 Object** arguments() { return arguments_; } |
68 | 68 |
69 private: | 69 private: |
70 int length_; | 70 int length_; |
71 Object** arguments_; | 71 Object** arguments_; |
72 }; | 72 }; |
73 | 73 |
74 | 74 |
75 // Cursom arguments replicate a small segment of stack that can be | 75 // Cursom arguments replicate a small segment of stack that can be |
76 // accessed through an Arguments object the same way the actual stack | 76 // accessed through an Arguments object the same way the actual stack |
77 // can. | 77 // can. |
78 class CustomArguments : public Relocatable { | 78 class CustomArguments : public Relocatable { |
79 public: | 79 public: |
80 inline CustomArguments(Object *data, | 80 inline CustomArguments(Object *data, |
81 JSObject *self, | 81 JSObject *self, |
82 JSObject *holder) { | 82 JSObject *holder) { |
83 values_[3] = self; | 83 values_[3] = self; |
84 values_[2] = holder; | 84 values_[2] = holder; |
85 values_[1] = Smi::FromInt(0); | 85 values_[1] = Smi::FromInt(0); |
86 values_[0] = data; | 86 values_[0] = data; |
87 } | 87 } |
88 void IterateInstance(ObjectVisitor* v); | 88 void IterateInstance(ObjectVisitor* v); |
89 Object** end() { return values_ + 3; } | 89 Object** end() { return values_ + 3; } |
90 private: | 90 private: |
91 Object* values_[4]; | 91 Object* values_[4]; |
92 }; | 92 }; |
93 | 93 |
94 | 94 |
95 } } // namespace v8::internal | 95 } } // namespace v8::internal |
96 | 96 |
97 #endif // V8_ARGUMENTS_H_ | 97 #endif // V8_ARGUMENTS_H_ |
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