rlgen-java/main.cpp

   1 /*
   2  *  Copyright 2001-2007 Adrian Thurston <thurston@cs.queensu.ca>
   3  */
   4
   5 /*  This file is part of Ragel.
   6  *
   7  *  Ragel is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  Ragel is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with Ragel; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25 #include <iostream>
  26 #include <fstream>
  27 #include <unistd.h>
  28
  29 #include "rlgen-java.h"
  30 #include "xmlparse.h"
  31 #include "pcheck.h"
  32 #include "vector.h"
  33 #include "version.h"
  34 #include "common.h"
  35 #include "javacodegen.h"
  36
  37 using std::istream;
  38 using std::ifstream;
  39 using std::ostream;
  40 using std::ios;
  41 using std::cin;
  42 using std::cout;
  43 using std::cerr;
  44 using std::endl;
  45
  46 /* Io globals. */
  47 extern istream *inStream;
  48 extern ostream *outStream;
  49 extern output_filter *outFilter;
  50 extern const char *outputFileName;
  51
  52 extern int numSplitPartitions;
  53
  54 /*
  55  * Callbacks invoked by the XML data parser.
  56  */
  57
  58 /* Invoked by the parser when the root element is opened. */
  59 ostream *javaOpenOutput( char *inputFile )
  60 {
  61         if ( hostLang->lang != HostLang::Java ) {
  62                 error() << "this code generator is for Java only" << endl;
  63                 exit(1);
  64         }
  65
  66         /* If the output format is code and no output file name is given, then
  67          * make a default. */
  68         if ( outputFileName == 0 ) {
  69                 char *ext = findFileExtension( inputFile );
  70                 if ( ext != 0 && strcmp( ext, ".rh" ) == 0 )
  71                         outputFileName = fileNameFromStem( inputFile, ".h" );
  72                 else
  73                         outputFileName = fileNameFromStem( inputFile, ".java" );
  74         }
  75
  76         /* Make sure we are not writing to the same file as the input file. */
  77         if ( outputFileName != 0 && strcmp( inputFile, outputFileName  ) == 0 ) {
  78                 error() << "output file \"" << outputFileName  <<
  79                                 "\" is the same as the input file" << endl;
  80         }
  81
  82         if ( outputFileName != 0 ) {
  83                 /* Create the filter on the output and open it. */
  84                 outFilter = new output_filter( outputFileName );
  85                 outFilter->open( outputFileName, ios::out|ios::trunc );
  86                 if ( !outFilter->is_open() ) {
  87                         error() << "error opening " << outputFileName << " for writing" << endl;
  88                         exit(1);
  89                 }
  90
  91                 /* Open the output stream, attaching it to the filter. */
  92                 outStream = new ostream( outFilter );
  93         }
  94         else {
  95                 /* Writing out ot std out. */
  96                 outStream = &cout;
  97         }
  98         return outStream;
  99 }
 100
 101 /* Invoked by the parser when a ragel definition is opened. */
 102 CodeGenData *javaMakeCodeGen( char *sourceFileName, char *fsmName,
 103                 ostream &out, bool wantComplete )
 104 {
 105         CodeGenData *codeGen = new JavaTabCodeGen(out);
 106
 107         codeGen->sourceFileName = sourceFileName;
 108         codeGen->fsmName = fsmName;
 109         codeGen->wantComplete = wantComplete;
 110
 111         return codeGen;
 112 }