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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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/qtqmlcompilerglobal_p.h>
#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 Q_QML_COMPILER_EXPORT ByteCodeHandler
{
Q_DISABLE_COPY_MOVE(ByteCodeHandler)
public:
ByteCodeHandler() = default;
virtual ~ByteCodeHandler();
void decode(const char *code, uint len);
void reset() { _currentOffset = _nextOffset = 0; }
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
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