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EbnfToken.cpp
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EbnfToken.cpp
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/*
* Copyright 2019 Rochus Keller <mailto:me@rochus-keller.ch>
*
* This file is part of the EbnfStudio application.
*
* The following is the license that applies to this copy of the
* application. For a license to use the application under conditions
* other than those described here, please email to me@rochus-keller.ch.
*
* GNU General Public License Usage
* This file may be used under the terms of the GNU General Public
* License (GPL) versions 2.0 or 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 GNU General Public Licensing requirements will be met:
* http://www.fsf.org/licensing/licenses/info/GPLv2.html and
* http://www.gnu.org/copyleft/gpl.html.
*/
#include "EbnfToken.h"
QString EbnfToken::toString(bool labeled) const
{
switch( d_type )
{
case Invalid:
return "<invalid>";
case Production:
if( labeled )
return "production " + d_val.toStr();
else
return d_val.toStr();
case Assig:
return "::=";
case AddTo:
return "+=";
case NonTerm:
if( labeled )
return "nonterminal " + d_val.toStr();
else
return d_val.toStr();
case Keyword:
if( labeled )
return "keyword " + d_val.toStr();
else
return d_val.toStr();
case Literal:
return '\'' + d_val.toStr() + '\'';
case Bar:
return "|";
case LPar:
return "(";
case RPar:
return ")";
case LBrack:
return "[";
case RBrack:
return "]";
case LBrace:
return "{";
case RBrace:
return "}";
case Predicate:
if( labeled )
return "predicate \\" + d_val.toStr() + "\\";
else
return "\\" + d_val.toStr() + "\\";
case Comment:
if( labeled )
return "comment " + d_val.toStr();
else
return d_val.toStr();
case Eof:
return "<eof>";
case PpDefine:
return "#define";
case PpUndef:
return "#undef";
case PpIfdef:
return "#ifdef";
case PpIfndef:
return "#ifndef";
case PpElse:
return "#else";
case PpEndif:
return "#endif";
}
return QByteArray();
}
QHash<QByteArray,EbnfToken::Sym> EbnfToken::s_symTbl;
QByteArray EbnfToken::Sym::toBa() const
{
if( d_str == 0 )
return QByteArray();
else
return QByteArray::fromRawData( d_str, ::strlen(d_str) );
}
QString EbnfToken::Sym::toStr() const
{
if( d_str == 0 )
return QString();
else
return QString::fromUtf8( d_str );
}
const char*EbnfToken::Sym::c_str() const
{
if( d_str == 0 )
return "";
else
return d_str;
}
int EbnfToken::Sym::size() const
{
if( d_str == 0 )
return 0;
else
return ::strlen(d_str);
}
bool EbnfToken::Sym::isEmpty() const
{
return d_str == 0;
}
EbnfToken::Sym EbnfToken::getSym(const QByteArray& str)
{
Sym& sym = s_symTbl[str];
if( sym.d_str == 0 )
sym.d_str = str.constData();
//qDebug() << str << (void*)(atom.constData());
return sym;
}
void EbnfToken::resetSymTbl()
{
}
bool EbnfToken::isPpType(int tt)
{
switch(tt)
{
case PpDefine:
case PpUndef:
case PpIfdef:
case PpIfndef:
case PpElse:
case PpEndif:
return true;
default:
return false;
}
}