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| |
| #ifndef QV4BYTECODEHANDLER_P_H |
| #define QV4BYTECODEHANDLER_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| #include <private/qv4instr_moth_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace QV4 { |
| namespace Moth { |
| |
| #define BYTECODE_HANDLER_DEFINE_ARGS(nargs, ...) \ |
| MOTH_EXPAND_FOR_MSVC(BYTECODE_HANDLER_DEFINE_ARGS##nargs(__VA_ARGS__)) |
| |
| #define BYTECODE_HANDLER_DEFINE_ARGS0() |
| #define BYTECODE_HANDLER_DEFINE_ARGS1(arg) \ |
| int arg |
| #define BYTECODE_HANDLER_DEFINE_ARGS2(arg1, arg2) \ |
| int arg1, \ |
| int arg2 |
| #define BYTECODE_HANDLER_DEFINE_ARGS3(arg1, arg2, arg3) \ |
| int arg1, \ |
| int arg2, \ |
| int arg3 |
| #define BYTECODE_HANDLER_DEFINE_ARGS4(arg1, arg2, arg3, arg4) \ |
| int arg1, \ |
| int arg2, \ |
| int arg3, \ |
| int arg4 |
| #define BYTECODE_HANDLER_DEFINE_ARGS5(arg1, arg2, arg3, arg4, arg5) \ |
| int arg1, \ |
| int arg2, \ |
| int arg3, \ |
| int arg4, \ |
| int arg5 |
| |
| #define BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER_INSTRUCTION(name, nargs, ...) \ |
| virtual void generate_##name( \ |
| BYTECODE_HANDLER_DEFINE_ARGS(nargs, __VA_ARGS__) \ |
| ) = 0; |
| |
| #define BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER(instr) \ |
| INSTR_##instr(BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER) |
| |
| class ByteCodeHandler |
| { |
| public: |
| virtual ~ByteCodeHandler(); |
| |
| void decode(const char *code, uint len); |
| |
| int currentInstructionOffset() const { return _currentOffset; } |
| int nextInstructionOffset() const { return _nextOffset; } |
| int absoluteOffset(int relativeOffset) const |
| { return nextInstructionOffset() + relativeOffset; } |
| |
| protected: |
| FOR_EACH_MOTH_INSTR(BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER) |
| |
| enum Verdict { ProcessInstruction, SkipInstruction }; |
| virtual Verdict startInstruction(Moth::Instr::Type instr) = 0; |
| virtual void endInstruction(Moth::Instr::Type instr) = 0; |
| |
| private: |
| int _currentOffset = 0; |
| int _nextOffset = 0; |
| }; |
| |
| } // Moth namespace |
| } // QV4 namespace |
| |
| QT_END_NAMESPACE |
| |
| #endif // QV4BYTECODEHANDLER_P_H |