kjs/Parser.cpp

   1 // -*- c-basic-offset: 4 -*-
   2 /*
   3  *  This file is part of the KDE libraries
   4  *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
   5  *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
   6  *  Copyright (C) 2003, 2006, 2007 Apple Inc.
   7  *
   8  *  This library is free software; you can redistribute it and/or
   9  *  modify it under the terms of the GNU Library General Public
  10  *  License as published by the Free Software Foundation; either
  11  *  version 2 of the License, or (at your option) any later version.
  12  *
  13  *  This library is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  Library General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU Library General Public License
  19  *  along with this library; see the file COPYING.LIB.  If not, write to
  20  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  *  Boston, MA 02110-1301, USA.
  22  *
  23  */
  24
  25 #include "config.h"
  26 #include "Parser.h"
  27
  28 #include "lexer.h"
  29 #include <wtf/HashSet.h>
  30 #include <wtf/Vector.h>
  31
  32 extern int kjsyyparse();
  33
  34 namespace KJS {
  35
  36 void Parser::parse(int* errLine, UString* errMsg)
  37 {
  38     ASSERT(!m_sourceElements);
  39
  40     if (errLine)
  41         *errLine = -1;
  42     if (errMsg)
  43         *errMsg = 0;
  44
  45     Lexer& lexer = KJS::lexer();
  46     lexer.setCode(*m_source);
  47
  48     int parseError = kjsyyparse();
  49     bool lexError = lexer.sawError();
  50     lexer.clear();
  51
  52     ParserRefCounted::deleteNewObjects();
  53
  54     if (parseError || lexError) {
  55         if (errLine)
  56             *errLine = lexer.lineNo();
  57         if (errMsg)
  58             *errMsg = "Parse error";
  59         m_sourceElements.clear();
  60     }
  61 }
  62
  63 void Parser::reparse(FunctionBodyNode* functionBodyNode)
  64 {
  65     m_source = &functionBodyNode->source();
  66     parse(0, 0);
  67     ASSERT(m_sourceElements);
  68
  69     functionBodyNode->setData(m_sourceElements.get(),
  70                               m_varDeclarations ? &m_varDeclarations->data : 0,
  71                               m_funcDeclarations ? &m_funcDeclarations->data : 0);
  72     functionBodyNode->setLoc(m_source->firstLine(), m_lastLine);
  73
  74     m_source = 0;
  75     m_sourceElements = 0;
  76     m_varDeclarations = 0;
  77     m_funcDeclarations = 0;
  78 }
  79
  80 void Parser::didFinishParsing(SourceElements* sourceElements, ParserRefCountedData<DeclarationStacks::VarStack>* varStack,
  81                               ParserRefCountedData<DeclarationStacks::FunctionStack>* funcStack, int lastLine)
  82 {
  83     m_sourceElements = sourceElements ? sourceElements : new SourceElements;
  84     m_varDeclarations = varStack;
  85     m_funcDeclarations = funcStack;
  86     m_lastLine = lastLine;
  87 }
  88
  89 Parser& parser()
  90 {
  91     ASSERT(JSLock::currentThreadIsHoldingLock());
  92
  93     static Parser& staticParser = *new Parser;
  94     return staticParser;
  95 }
  96
  97 } // namespace KJS