Tools/Java/Source/Cpptasks/net/sf/antcontrib/cpptasks/parser/CParser.java

   1 /*
   2  *
   3  * Copyright 2002-2004 The Ant-Contrib project
   4  *
   5  *  Licensed under the Apache License, Version 2.0 (the "License");
   6  *  you may not use this file except in compliance with the License.
   7  *  You may obtain a copy of the License at
   8  *
   9  *      http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  *  Unless required by applicable law or agreed to in writing, software
  12  *  distributed under the License is distributed on an "AS IS" BASIS,
  13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  *  See the License for the specific language governing permissions and
  15  *  limitations under the License.
  16  */
  17 package net.sf.antcontrib.cpptasks.parser;
  18 import java.io.IOException;
  19 import java.io.Reader;
  20 import java.util.Vector;
  21 /**
  22  * A parser that extracts #include statements from a Reader.
  23  *
  24  * @author Adam Murdoch
  25  * @author Curt Arnold
  26  */
  27 public final class CParser extends AbstractParser implements Parser {
  28     private final Vector includes = new Vector();
  29     private AbstractParserState newLineState;
  30     /**
  31      *
  32      *
  33      */
  34     public CParser() {
  35         AbstractParserState quote = new FilenameState(this, new char[]{'"'});
  36         AbstractParserState bracket = new FilenameState(this, new char[]{'>'});
  37         AbstractParserState postE = new PostE(this, bracket, quote);
  38         //
  39         //    nclude
  40         //
  41         AbstractParserState e = new LetterState(this, 'e', postE, null);
  42         AbstractParserState d = new LetterState(this, 'd', e, null);
  43         AbstractParserState u = new LetterState(this, 'u', d, null);
  44         AbstractParserState l = new LetterState(this, 'l', u, null);
  45         AbstractParserState c = new LetterState(this, 'c', l, null);
  46         AbstractParserState n = new LetterState(this, 'n', c, null);
  47         //
  48         //   mport is equivalent to nclude
  49         //
  50         AbstractParserState t = new LetterState(this, 't', postE, null);
  51         AbstractParserState r = new LetterState(this, 'r', t, null);
  52         AbstractParserState o = new LetterState(this, 'o', r, null);
  53         AbstractParserState p = new LetterState(this, 'p', o, null);
  54         AbstractParserState m = new LetterState(this, 'm', p, null);
  55         //
  56         //   switch between
  57         //
  58         AbstractParserState n_m = new BranchState(this, new char[]{'n', 'm'},
  59                 new AbstractParserState[]{n, m}, null);
  60         AbstractParserState i = new WhitespaceOrLetterState(this, 'i', n_m);
  61         newLineState = new LetterState(this, '#', i, null);
  62     }
  63     public void addFilename(String include) {
  64         includes.addElement(include);
  65     }
  66     public String[] getIncludes() {
  67         String[] retval = new String[includes.size()];
  68         includes.copyInto(retval);
  69         return retval;
  70     }
  71     public AbstractParserState getNewLineState() {
  72         return newLineState;
  73     }
  74     public void parse(Reader reader) throws IOException {
  75         includes.setSize(0);
  76         super.parse(reader);
  77     }
  78 }