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/*
SPDX-FileCopyrightText: 2005, 2006 Jakob Petsovits <jpetso@gmx.at>
Based on QMake Parser Copyright 2006 Andreas Pakulat <apaku@gmx.de>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "factlexer.h"
#include <QString>
#include <QStringList>
#include <QDebug>
#include "factparser.h"
#include <kdev-pg-location-table.h>
#include <kdev-pg-token-stream.h>
using namespace fact;
Lexer::Lexer( Parser* _parser, const QString& content ):
m_content( content ), m_parser( _parser ),
m_curpos( 0 ), m_contentSize( m_content.size() ),
m_tokenBegin( 0 ), m_tokenEnd( 0 )
{
pushState( ErrorState );
pushState( DefaultState );
}
int Lexer::state() const
{
return mState.top();
}
void Lexer::pushState( int state )
{
mState.push( state );
}
void Lexer::popState()
{
mState.pop();
}
int Lexer::nextTokenKind()
{
int token = Parser::Token_INVALID;
if ( m_curpos >= m_contentSize )
{
return 0;
}
QChar* it = m_content.data();
it += m_curpos;
// Ignore whitespace
while ( m_curpos < m_contentSize && ( it->isSpace() ) )
{
if (it->unicode() == '\n') {
createNewline(m_curpos);
}
++it;
++m_curpos;
}
switch ( state() )
{
case DefaultState:
m_tokenBegin = m_curpos;
if ( m_curpos < m_contentSize )
{
if ( it->isLetter() )
{
QString identifier;
while ( m_curpos < m_contentSize && ( it->isLetter() || it->isDigit() ) && !it->isSpace() ) {
identifier.append(*it);
++it;
++m_curpos;
}
m_curpos--;
QChar* it1 = m_content.data();
it1 += m_curpos;
if ( identifier == "if" ) {
token = Parser::Token_IF;
} else if ( identifier == "else" ) {
token = Parser::Token_ELSE;
} else if ( identifier == "var" ) {
token = Parser::Token_VAR;
} else if ( identifier == "function" ) {
token = Parser::Token_FUNCTION;
} else if ( identifier == "return" ) {
token = Parser::Token_RETURN;
} else {
token = Parser::Token_IDENTIFIER;
}
}
else if ( it->isDigit() )
{
token = Parser::Token_NUMBER;
while ( m_curpos < m_contentSize && ( it->isDigit() ) ) {
++it;
++m_curpos;
}
--m_curpos;
}
else
{
switch ( it->unicode() )
{
case ',':
token = Parser::Token_COMMA;
break;
case ';':
token = Parser::Token_SEMICOLON;
break;
case '(':
token = Parser::Token_LPAREN;
break;
case ')':
token = Parser::Token_RPAREN;
break;
case '{':
token = Parser::Token_LBRACE;
break;
case '}':
token = Parser::Token_RBRACE;
break;
case '=':
{
QChar* c2 = m_curpos < m_contentSize ? it + 1 : 0 ;
if ( c2 && c2->unicode() == '=' )
{
m_curpos++;
token = Parser::Token_EQUAL;
} else {
token = Parser::Token_ASSIGN;
}
break;
}
case '*':
token = Parser::Token_STAR;
break;
case '-':
token = Parser::Token_MINUS;
break;
default:
break;
}
}
}
break;
default:
token = Parser::Token_INVALID;
break;
}
if ( m_curpos >= m_contentSize )
{
return 0;
}
m_tokenEnd = m_curpos;
m_curpos++;
return token;
}
qint64 Lexer::tokenBegin() const
{
return m_tokenBegin;
}
qint64 Lexer::tokenEnd() const
{
return m_tokenEnd;
}
void Lexer::createNewline( int pos )
{
if( m_parser )
m_parser->tokenStream->locationTable()->newline( pos );
}
// kate: space-indent on; indent-width 4; tab-width 4; replace-tabs on
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