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 Parser::Parser()
  37     : m_sourceId(0)
  38 {
  39 }
  40
  41 void Parser::parse(int startingLineNumber,
  42     const UChar* code, unsigned length,
  43     int* sourceId, int* errLine, UString* errMsg)
  44 {
  45     ASSERT(!m_sourceElements);
  46
  47     if (errLine)
  48         *errLine = -1;
  49     if (errMsg)
  50         *errMsg = 0;
  51
  52     Lexer& lexer = KJS::lexer();
  53
  54     lexer.setCode(startingLineNumber, code, length);
  55     m_sourceId++;
  56     if (sourceId)
  57         *sourceId = m_sourceId;
  58
  59     int parseError = kjsyyparse();
  60     bool lexError = lexer.sawError();
  61     lexer.clear();
  62
  63     ParserRefCounted::deleteNewObjects();
  64
  65     if (parseError || lexError) {
  66         if (errLine)
  67             *errLine = lexer.lineNo();
  68         if (errMsg)
  69             *errMsg = "Parse error";
  70         m_sourceElements.clear();
  71     }
  72 }
  73
  74 void Parser::didFinishParsing(SourceElements* sourceElements, ParserRefCountedData<DeclarationStacks::VarStack>* varStack,
  75                               ParserRefCountedData<DeclarationStacks::FunctionStack>* funcStack, int lastLine)
  76 {
  77     m_sourceElements = sourceElements ? sourceElements : new SourceElements;
  78     m_varDeclarations = varStack;
  79     m_funcDeclarations = funcStack;
  80     m_lastLine = lastLine;
  81 }
  82
  83 Parser& parser()
  84 {
  85     ASSERT(JSLock::currentThreadIsHoldingLock());
  86
  87     static Parser& staticParser = *new Parser;
  88     return staticParser;
  89 }
  90
  91 } // namespace KJS