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39 | |
40 | #ifndef QV4BYTECODEHANDLER_P_H |
41 | #define QV4BYTECODEHANDLER_P_H |
42 | |
43 | // |
44 | // W A R N I N G |
45 | // ------------- |
46 | // |
47 | // This file is not part of the Qt API. It exists purely as an |
48 | // implementation detail. This header file may change from version to |
49 | // version without notice, or even be removed. |
50 | // |
51 | // We mean it. |
52 | // |
53 | #include <private/qv4instr_moth_p.h> |
54 | |
55 | QT_BEGIN_NAMESPACE |
56 | |
57 | namespace QV4 { |
58 | namespace Moth { |
59 | |
60 | #define BYTECODE_HANDLER_DEFINE_ARGS(nargs, ...) \ |
61 | MOTH_EXPAND_FOR_MSVC(BYTECODE_HANDLER_DEFINE_ARGS##nargs(__VA_ARGS__)) |
62 | |
63 | #define BYTECODE_HANDLER_DEFINE_ARGS0() |
64 | #define BYTECODE_HANDLER_DEFINE_ARGS1(arg) \ |
65 | int arg |
66 | #define BYTECODE_HANDLER_DEFINE_ARGS2(arg1, arg2) \ |
67 | int arg1, \ |
68 | int arg2 |
69 | #define BYTECODE_HANDLER_DEFINE_ARGS3(arg1, arg2, arg3) \ |
70 | int arg1, \ |
71 | int arg2, \ |
72 | int arg3 |
73 | #define BYTECODE_HANDLER_DEFINE_ARGS4(arg1, arg2, arg3, arg4) \ |
74 | int arg1, \ |
75 | int arg2, \ |
76 | int arg3, \ |
77 | int arg4 |
78 | #define BYTECODE_HANDLER_DEFINE_ARGS5(arg1, arg2, arg3, arg4, arg5) \ |
79 | int arg1, \ |
80 | int arg2, \ |
81 | int arg3, \ |
82 | int arg4, \ |
83 | int arg5 |
84 | |
85 | #define BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER_INSTRUCTION(name, nargs, ...) \ |
86 | virtual void generate_##name( \ |
87 | BYTECODE_HANDLER_DEFINE_ARGS(nargs, __VA_ARGS__) \ |
88 | ) = 0; |
89 | |
90 | #define BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER(instr) \ |
91 | INSTR_##instr(BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER) |
92 | |
93 | class ByteCodeHandler |
94 | { |
95 | public: |
96 | virtual ~ByteCodeHandler(); |
97 | |
98 | void decode(const char *code, uint len); |
99 | |
100 | int currentInstructionOffset() const { return _currentOffset; } |
101 | int nextInstructionOffset() const { return _nextOffset; } |
102 | int absoluteOffset(int relativeOffset) const |
103 | { return nextInstructionOffset() + relativeOffset; } |
104 | |
105 | protected: |
106 | FOR_EACH_MOTH_INSTR(BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER) |
107 | |
108 | enum Verdict { ProcessInstruction, SkipInstruction }; |
109 | virtual Verdict startInstruction(Moth::Instr::Type instr) = 0; |
110 | virtual void endInstruction(Moth::Instr::Type instr) = 0; |
111 | |
112 | private: |
113 | int _currentOffset = 0; |
114 | int _nextOffset = 0; |
115 | }; |
116 | |
117 | } // Moth namespace |
118 | } // QV4 namespace |
119 | |
120 | QT_END_NAMESPACE |
121 | |
122 | #endif // QV4BYTECODEHANDLER_P_H |
123 | |