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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the V4VM module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QMLJS_ENVIRONMENT_H
#define QMLJS_ENVIRONMENT_H
#include "qv4global_p.h"
#include "qv4runtime_p.h"
QT_BEGIN_NAMESPACE
namespace QQmlJS {
namespace VM {
struct Value;
struct Object;
struct ExecutionEngine;
struct DeclarativeEnvironment;
struct Lookup;
struct Q_V4_EXPORT DiagnosticMessage
{
enum { Error, Warning };
QString fileName;
quint32 offset;
quint32 length;
quint32 startLine;
unsigned startColumn: 31;
unsigned type: 1;
QString message;
DiagnosticMessage *next;
DiagnosticMessage();
~DiagnosticMessage();
String *buildFullMessage(ExecutionContext *ctx) const;
};
struct CallContext;
struct ExecutionContext
{
enum Type {
Type_GlobalContext = 0x1,
Type_CatchContext = 0x2,
Type_WithContext = 0x3,
Type_SimpleCallContext = 0x4,
Type_CallContext = 0x5,
Type_QmlContext = 0x6
};
Type type;
bool strictMode;
bool marked;
Value thisObject;
ExecutionEngine *engine;
ExecutionContext *parent;
ExecutionContext *outer;
Lookup *lookups;
ExecutionContext *next; // used in the GC
String * const *formals() const;
unsigned int formalCount() const;
String * const *variables() const;
unsigned int variableCount() const;
void createMutableBinding(String *name, bool deletable);
void Q_NORETURN throwError(const Value &value);
void Q_NORETURN throwError(const QString &message);
void Q_NORETURN throwSyntaxError(DiagnosticMessage *message);
void Q_NORETURN throwTypeError();
void Q_NORETURN throwReferenceError(Value value);
void Q_NORETURN throwRangeError(Value value);
void Q_NORETURN throwURIError(Value msg);
void Q_NORETURN throwUnimplemented(const QString &message);
void setProperty(String *name, const Value &value);
Value getProperty(String *name);
Value getPropertyNoThrow(String *name);
Value getPropertyAndBase(String *name, Object **base);
void inplaceBitOp(String *name, const QQmlJS::VM::Value &value, BinOp op);
bool deleteProperty(String *name);
inline Value argument(unsigned int index = 0);
void mark();
inline CallContext *asCallContext();
};
struct SimpleCallContext : public ExecutionContext
{
FunctionObject *function;
Value *arguments;
unsigned int argumentCount;
};
struct CallContext : public SimpleCallContext
{
void initCallContext(QQmlJS::VM::ExecutionEngine *engine);
bool needsOwnArguments() const;
Value *locals;
Object *activation;
};
struct GlobalContext : public ExecutionContext
{
void init(ExecutionEngine *e);
Object *global;
};
struct CatchContext : public ExecutionContext
{
void init(ExecutionContext *p, String *exceptionVarName, const QQmlJS::VM::Value &exceptionValue);
String *exceptionVarName;
Value exceptionValue;
};
struct WithContext : public ExecutionContext
{
Object *withObject;
void init(ExecutionContext *p, Object *with);
};
inline Value ExecutionContext::argument(unsigned int index)
{
if (type >= Type_SimpleCallContext) {
CallContext *ctx = static_cast<CallContext *>(this);
if (index < ctx->argumentCount)
return ctx->arguments[index];
}
return Value::undefinedValue();
}
inline CallContext *ExecutionContext::asCallContext()
{
return type >= Type_CallContext ? static_cast<CallContext *>(this) : 0;
}
/* Function *f, int argc */
#define requiredMemoryForExecutionContect(f, argc) \
sizeof(CallContext) + sizeof(Value) * (f->varCount + qMax((uint)argc, f->formalParameterCount))
#define stackContextSize (sizeof(CallContext) + 32*sizeof(Value))
} // namespace VM
} // namespace QQmlJS
QT_END_NAMESPACE
#endif
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