| 1 | // Copyright (C) 2018 The Qt Company Ltd. |
|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
|---|
| 3 | |
|---|
| 4 | #ifndef QV4BYTECODEHANDLER_P_H |
|---|
| 5 | #define QV4BYTECODEHANDLER_P_H |
|---|
| 6 | |
|---|
| 7 | // |
|---|
| 8 | // W A R N I N G |
|---|
| 9 | // ------------- |
|---|
| 10 | // |
|---|
| 11 | // This file is not part of the Qt API. It exists purely as an |
|---|
| 12 | // implementation detail. This header file may change from version to |
|---|
| 13 | // version without notice, or even be removed. |
|---|
| 14 | // |
|---|
| 15 | // We mean it. |
|---|
| 16 | // |
|---|
| 17 | |
|---|
| 18 | #include <private/qtqmlcompilerglobal_p.h> |
|---|
| 19 | #include <private/qv4instr_moth_p.h> |
|---|
| 20 | |
|---|
| 21 | QT_BEGIN_NAMESPACE |
|---|
| 22 | |
|---|
| 23 | namespace QV4 { |
|---|
| 24 | namespace Moth { |
|---|
| 25 | |
|---|
| 26 | #define BYTECODE_HANDLER_DEFINE_ARGS(nargs, ...) \ |
|---|
| 27 | MOTH_EXPAND_FOR_MSVC(BYTECODE_HANDLER_DEFINE_ARGS##nargs(__VA_ARGS__)) |
|---|
| 28 | |
|---|
| 29 | #define BYTECODE_HANDLER_DEFINE_ARGS0() |
|---|
| 30 | #define BYTECODE_HANDLER_DEFINE_ARGS1(arg) \ |
|---|
| 31 | int arg |
|---|
| 32 | #define BYTECODE_HANDLER_DEFINE_ARGS2(arg1, arg2) \ |
|---|
| 33 | int arg1, \ |
|---|
| 34 | int arg2 |
|---|
| 35 | #define BYTECODE_HANDLER_DEFINE_ARGS3(arg1, arg2, arg3) \ |
|---|
| 36 | int arg1, \ |
|---|
| 37 | int arg2, \ |
|---|
| 38 | int arg3 |
|---|
| 39 | #define BYTECODE_HANDLER_DEFINE_ARGS4(arg1, arg2, arg3, arg4) \ |
|---|
| 40 | int arg1, \ |
|---|
| 41 | int arg2, \ |
|---|
| 42 | int arg3, \ |
|---|
| 43 | int arg4 |
|---|
| 44 | #define BYTECODE_HANDLER_DEFINE_ARGS5(arg1, arg2, arg3, arg4, arg5) \ |
|---|
| 45 | int arg1, \ |
|---|
| 46 | int arg2, \ |
|---|
| 47 | int arg3, \ |
|---|
| 48 | int arg4, \ |
|---|
| 49 | int arg5 |
|---|
| 50 | |
|---|
| 51 | #define BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER_INSTRUCTION(name, nargs, ...) \ |
|---|
| 52 | virtual void generate_##name( \ |
|---|
| 53 | BYTECODE_HANDLER_DEFINE_ARGS(nargs, __VA_ARGS__) \ |
|---|
| 54 | ) = 0; |
|---|
| 55 | |
|---|
| 56 | #define BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER(instr) \ |
|---|
| 57 | INSTR_##instr(BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER) |
|---|
| 58 | |
|---|
| 59 | class Q_QML_COMPILER_PRIVATE_EXPORT ByteCodeHandler |
|---|
| 60 | { |
|---|
| 61 | Q_DISABLE_COPY_MOVE(ByteCodeHandler) |
|---|
| 62 | public: |
|---|
| 63 | ByteCodeHandler() = default; |
|---|
| 64 | virtual ~ByteCodeHandler(); |
|---|
| 65 | |
|---|
| 66 | void decode(const char *code, uint len); |
|---|
| 67 | void reset() { _currentOffset = _nextOffset = 0; } |
|---|
| 68 | |
|---|
| 69 | int currentInstructionOffset() const { return _currentOffset; } |
|---|
| 70 | int nextInstructionOffset() const { return _nextOffset; } |
|---|
| 71 | int absoluteOffset(int relativeOffset) const |
|---|
| 72 | { return nextInstructionOffset() + relativeOffset; } |
|---|
| 73 | |
|---|
| 74 | protected: |
|---|
| 75 | FOR_EACH_MOTH_INSTR(BYTECODE_HANDLER_DEFINE_VIRTUAL_BYTECODE_HANDLER) |
|---|
| 76 | |
|---|
| 77 | enum Verdict { ProcessInstruction, SkipInstruction }; |
|---|
| 78 | virtual Verdict startInstruction(Moth::Instr::Type instr) = 0; |
|---|
| 79 | virtual void endInstruction(Moth::Instr::Type instr) = 0; |
|---|
| 80 | |
|---|
| 81 | private: |
|---|
| 82 | int _currentOffset = 0; |
|---|
| 83 | int _nextOffset = 0; |
|---|
| 84 | }; |
|---|
| 85 | |
|---|
| 86 | } // Moth namespace |
|---|
| 87 | } // QV4 namespace |
|---|
| 88 | |
|---|
| 89 | QT_END_NAMESPACE |
|---|
| 90 | |
|---|
| 91 | #endif // QV4BYTECODEHANDLER_P_H |
|---|
| 92 | |
|---|
