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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtQml 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qv4function_p.h"
#include "qv4managed_p.h"
#include "qv4string_p.h"
#include "qv4value_p.h"
#include "qv4engine_p.h"
#include "qv4lookup_p.h"
#include "qv4unwindhelper_p.h"
QT_BEGIN_NAMESPACE
using namespace QV4;
Function::~Function()
{
}
void Function::init(CompiledData::CompilationUnit *unit, const CompiledData::Function *function, Value (*codePtr)(ExecutionContext *, const uchar *),
quint32 _codeSize)
{
Q_ASSERT(!compilationUnit);
compilationUnit = unit;
compiledFunction = function;
code = codePtr;
codeSize = _codeSize;
formals.resize(compiledFunction->nFormals);
const quint32 *formalsIndices = compiledFunction->formalsTable();
for (int i = 0; i < compiledFunction->nFormals; ++i)
formals[i] = engine->newString(unit->data->stringAt(formalsIndices[i])->qString());
locals.resize(compiledFunction->nLocals);
const quint32 *localsIndices = compiledFunction->localsTable();
for (int i = 0; i < compiledFunction->nLocals; ++i)
locals[i] = engine->newString(unit->data->stringAt(localsIndices[i])->qString());
}
void Function::mark()
{
if (name)
name->mark();
for (int i = 0; i < formals.size(); ++i)
formals.at(i)->mark();
for (int i = 0; i < locals.size(); ++i)
locals.at(i)->mark();
}
namespace QV4 {
struct LineNumberMappingHelper
{
const quint32 *table;
int lowerBound(int begin, int end, qptrdiff offset) {
int middle;
int n = int(end - begin);
int half;
while (n > 0) {
half = n >> 1;
middle = begin + half;
if (table[middle * 2] < offset) {
begin = middle + 1;
n -= half + 1;
} else {
n = half;
}
}
return begin;
}
};
}
int Function::lineNumberForProgramCounter(qptrdiff offset) const
{
LineNumberMappingHelper helper;
helper.table = compiledFunction->lineNumberMapping();
const uint count = compiledFunction->nLineNumberMappingEntries;
int pos = helper.lowerBound(0, count, offset);
if (pos != 0 && count > 0)
--pos;
if (pos == count)
return -1;
return helper.table[pos * 2 + 1];
}
QT_END_NAMESPACE
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