Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
400 lines
10 KiB
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400 lines
10 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the tools applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtDebug>
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#include "config.h"
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#include "location.h"
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#include <qregexp.h>
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#include <qtranslator.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <stdio.h>
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QT_BEGIN_NAMESPACE
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QT_STATIC_CONST_IMPL Location Location::null;
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int Location::tabSize;
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QString Location::programName;
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QRegExp *Location::spuriousRegExp = 0;
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/*!
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\class Location
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\brief The Location class keeps track of where we are in a file.
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It maintains a stack of file positions. A file position
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consists of the file path, line number, and column number.
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The location is used for printing error messages that are
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tied to a location in a file.
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*/
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/*!
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Constructs an empty location.
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*/
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Location::Location()
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: stk(0), stkTop(&stkBottom), stkDepth(0), etcetera(false)
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{
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// nothing.
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}
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/*!
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Constructs a location with (fileName, 1, 1) on its file
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position stack.
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*/
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Location::Location(const QString& fileName)
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: stk(0), stkTop(&stkBottom), stkDepth(0), etcetera(false)
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{
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push(fileName);
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}
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/*!
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The copy constructor copies the contents of \a other into
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this Location using the assignment operator.
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*/
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Location::Location(const Location& other)
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: stk(0), stkTop(&stkBottom), stkDepth(0), etcetera(false)
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{
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*this = other;
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}
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/*!
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The assignment operator does a deep copy of the entire
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state of \a other into this Location.
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*/
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Location& Location::operator=(const Location& other)
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{
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QStack<StackEntry> *oldStk = stk;
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stkBottom = other.stkBottom;
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if (other.stk == 0) {
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stk = 0;
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stkTop = &stkBottom;
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}
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else {
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stk = new QStack<StackEntry>(*other.stk);
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stkTop = &stk->top();
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}
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stkDepth = other.stkDepth;
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etcetera = other.etcetera;
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delete oldStk;
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return *this;
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}
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/*!
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If the file position on top of the stack has a line number
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less than 1, set its line number to 1 and its column number
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to 1. Otherwise, do nothing.
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*/
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void Location::start()
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{
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if (stkTop->lineNo < 1) {
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stkTop->lineNo = 1;
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stkTop->columnNo = 1;
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}
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}
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/*!
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Advance the current file position, using \a ch to decide how to do
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that. If \a ch is a \c{'\\n'}, increment the current line number and
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set the column number to 1. If \ch is a \c{'\\t'}, increment to the
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next tab column. Otherwise, increment the column number by 1.
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The current file position is the one on top of the position stack.
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*/
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void Location::advance(QChar ch)
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{
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if (ch == QLatin1Char('\n')) {
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stkTop->lineNo++;
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stkTop->columnNo = 1;
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}
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else if (ch == QLatin1Char('\t')) {
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stkTop->columnNo =
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1 + tabSize * (stkTop->columnNo + tabSize-1) / tabSize;
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}
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else {
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stkTop->columnNo++;
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}
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}
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/*!
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Pushes \a filePath onto the file position stack. The current
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file position becomes (\a filePath, 1, 1).
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\sa pop()
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*/
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void Location::push(const QString& filePath)
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{
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if (stkDepth++ >= 1) {
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if (stk == 0)
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stk = new QStack<StackEntry>;
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stk->push(StackEntry());
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stkTop = &stk->top();
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}
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stkTop->filePath = filePath;
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stkTop->lineNo = INT_MIN;
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stkTop->columnNo = 1;
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}
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/*!
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Pops the top of the internal stack. The current file position
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becomes the next one in the new top of stack.
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\sa push()
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*/
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void Location::pop()
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{
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if (--stkDepth == 0) {
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stkBottom = StackEntry();
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}
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else {
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stk->pop();
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if (stk->isEmpty()) {
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delete stk;
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stk = 0;
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stkTop = &stkBottom;
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}
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else {
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stkTop = &stk->top();
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}
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}
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}
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/*! \fn bool Location::isEmpty() const
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Returns true if there is no file name set yet; returns false
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otherwise. The functions filePath(), lineNo() and columnNo()
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must not be called on an empty Location object.
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*/
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/*! \fn const QString& Location::filePath() const
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Returns the current path and file name.
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Must not be called on an empty Location object.
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\sa lineNo(), columnNo()
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*/
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/*!
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Returns the file name part of the file path, ie the
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current file. Must not be called on an empty Location
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object.
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*/
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QString Location::fileName() const
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{
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QString fp = filePath();
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return fp.mid(fp.lastIndexOf('/') + 1);
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}
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/*! \fn int Location::lineNo() const
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Returns the current line number.
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Must not be called on an empty Location object.
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\sa filePath(), columnNo()
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*/
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/*! \fn int Location::columnNo() const
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Returns the current column number.
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Must not be called on an empty Location object.
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\sa filePath(), lineNo()
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*/
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/*!
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Writes \a message and \a detals to stderr as a formatted
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warning message.
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*/
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void Location::warning(const QString& message, const QString& details) const
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{
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emitMessage(Warning, message, details);
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}
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/*!
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Writes \a message and \a detals to stderr as a formatted
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error message.
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*/
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void Location::error(const QString& message, const QString& details) const
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{
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emitMessage(Error, message, details);
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}
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/*!
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Writes \a message and \a detals to stderr as a formatted
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error message and then exits the program.
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*/
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void Location::fatal(const QString& message, const QString& details) const
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{
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emitMessage(Error, message, details);
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information(message);
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information(details);
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information("Aborting");
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exit(EXIT_FAILURE);
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}
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/*!
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Gets several parameters from the \a config, including
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tab size, program name, and a regular expression that
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appears to be used for matching certain error messages
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so that emitMessage() can avoid printing them.
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*/
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void Location::initialize(const Config& config)
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{
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tabSize = config.getInt(CONFIG_TABSIZE);
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programName = config.programName();
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QRegExp regExp = config.getRegExp(CONFIG_SPURIOUS);
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if (regExp.isValid()) {
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spuriousRegExp = new QRegExp(regExp);
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}
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else {
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config.lastLocation().warning(tr("Invalid regular expression '%1'")
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.arg(regExp.pattern()));
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}
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}
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/*!
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Apparently, all this does is delete the regular expression
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used for intercepting certain error messages that should
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not be emitted by emitMessage().
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*/
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void Location::terminate()
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{
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delete spuriousRegExp;
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spuriousRegExp = 0;
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}
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/*!
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Prints \a message to \c stdout followed by a \c{'\n'}.
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*/
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void Location::information(const QString& message)
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{
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printf("%s\n", message.toLatin1().data());
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fflush(stdout);
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}
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/*!
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Report a program bug, including the \a hint.
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*/
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void Location::internalError(const QString& hint)
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{
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Location::null.fatal(tr("Internal error (%1)").arg(hint),
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tr("There is a bug in %1. Seek advice from your local"
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" %2 guru.")
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.arg(programName).arg(programName));
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}
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/*!
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Formats \a message and \a details into a single string
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and outputs that string to \c stderr. \a type specifies
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whether the \a message is an error or a warning.
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*/
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void Location::emitMessage(MessageType type,
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const QString& message,
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const QString& details) const
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{
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if (type == Warning &&
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spuriousRegExp != 0 &&
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spuriousRegExp->exactMatch(message))
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return;
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QString result = message;
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if (!details.isEmpty())
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result += "\n[" + details + "]";
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result.replace("\n", "\n ");
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if (type == Error)
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result.prepend(tr("error: "));
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result.prepend(toString());
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fprintf(stderr, "%s\n", result.toLatin1().data());
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fflush(stderr);
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}
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/*!
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Converts the location to a string to be prepended to error
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messages.
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*/
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QString Location::toString() const
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{
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QString str;
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if (isEmpty()) {
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str = programName;
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}
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else {
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Location loc2 = *this;
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loc2.setEtc(false);
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loc2.pop();
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if (!loc2.isEmpty()) {
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QString blah = tr("In file included from ");
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for (;;) {
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str += blah;
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str += loc2.top();
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loc2.pop();
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if (loc2.isEmpty())
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break;
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str += tr(",");
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str += QLatin1Char('\n');
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blah.fill(' ');
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}
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str += tr(":");
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str += QLatin1Char('\n');
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}
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str += top();
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}
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str += QLatin1String(": ");
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return str;
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}
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QString Location::top() const
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{
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QString str = filePath();
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if (lineNo() >= 1) {
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str += QLatin1Char(':');
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str += QString::number(lineNo());
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}
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if (etc())
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str += QLatin1String(" (etc.)");
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return str;
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}
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QT_END_NAMESPACE
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