rlgen-java/main.cpp

   1 /*
   2  *  Copyright 2001-2005 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 istream *inStream = 0;
  48 ostream *outStream = 0;
  49 output_filter *outFilter = 0;
  50 char *outputFileName = 0;
  51
  52 /* Graphviz dot file generation. */
  53 bool graphvizDone = false;
  54
  55 int numSplitPartitions = 0;
  56 bool printPrintables = false;
  57
  58 /* Print a summary of the options. */
  59 void usage()
  60 {
  61         cout <<
  62 "usage: " PROGNAME " [options] file\n"
  63 "general:\n"
  64 "   -h, -H, -?, --help    Print this usage and exit\n"
  65 "   -v, --version         Print version information and exit\n"
  66 "   -o <file>             Write output to <file>\n"
  67         ;
  68 }
  69
  70 /* Print version information. */
  71 void version()
  72 {
  73         cout << "Ragel Code Generator for Java" << endl <<
  74                         "Version " VERSION << ", " PUBDATE << endl <<
  75                         "Copyright (c) 2001-2007 by Adrian Thurston" << endl;
  76 }
  77
  78 /* Total error count. */
  79 int gblErrorCount = 0;
  80
  81 ostream &error()
  82 {
  83         gblErrorCount += 1;
  84         cerr << PROGNAME ": ";
  85         return cerr;
  86 }
  87
  88 /*
  89  * Callbacks invoked by the XML data parser.
  90  */
  91
  92 /* Invoked by the parser when the root element is opened. */
  93 ostream *openOutput( char *inputFile )
  94 {
  95         if ( hostLangType != JavaCode )
  96                 error() << "this code generator is for Java only" << endl;
  97
  98         /* If the output format is code and no output file name is given, then
  99          * make a default. */
 100         if ( outputFileName == 0 ) {
 101                 char *ext = findFileExtension( inputFile );
 102                 if ( ext != 0 && strcmp( ext, ".rh" ) == 0 )
 103                         outputFileName = fileNameFromStem( inputFile, ".h" );
 104                 else
 105                         outputFileName = fileNameFromStem( inputFile, ".java" );
 106         }
 107
 108         /* Make sure we are not writing to the same file as the input file. */
 109         if ( outputFileName != 0 && strcmp( inputFile, outputFileName  ) == 0 ) {
 110                 error() << "output file \"" << outputFileName  <<
 111                                 "\" is the same as the input file" << endl;
 112         }
 113
 114         if ( outputFileName != 0 ) {
 115                 /* Create the filter on the output and open it. */
 116                 outFilter = new output_filter( outputFileName );
 117                 outFilter->open( outputFileName, ios::out|ios::trunc );
 118                 if ( !outFilter->is_open() ) {
 119                         error() << "error opening " << outputFileName << " for writing" << endl;
 120                         exit(1);
 121                 }
 122
 123                 /* Open the output stream, attaching it to the filter. */
 124                 outStream = new ostream( outFilter );
 125         }
 126         else {
 127                 /* Writing out ot std out. */
 128                 outStream = &cout;
 129         }
 130         return outStream;
 131 }
 132
 133 /* Invoked by the parser when a ragel definition is opened. */
 134 CodeGenData *makeCodeGen( char *sourceFileName, char *fsmName,
 135                 ostream &out, bool wantComplete )
 136 {
 137         CodeGenData *codeGen = new JavaTabCodeGen(out);
 138
 139         codeGen->sourceFileName = sourceFileName;
 140         codeGen->fsmName = fsmName;
 141         codeGen->wantComplete = wantComplete;
 142
 143         return codeGen;
 144 }
 145
 146 /* Main, process args and call yyparse to start scanning input. */
 147 int main(int argc, char **argv)
 148 {
 149         ParamCheck pc("o:VpT:F:G:vHh?-:P:", argc, argv);
 150         char *xmlInputFileName = 0;
 151
 152         while ( pc.check() ) {
 153                 switch ( pc.state ) {
 154                 case ParamCheck::match:
 155                         switch ( pc.parameter ) {
 156                         /* Output. */
 157                         case 'o':
 158                                 if ( *pc.parameterArg == 0 )
 159                                         error() << "a zero length output file name was given" << endl;
 160                                 else if ( outputFileName != 0 )
 161                                         error() << "more than one output file name was given" << endl;
 162                                 else {
 163                                         /* Ok, remember the output file name. */
 164                                         outputFileName = pc.parameterArg;
 165                                 }
 166                                 break;
 167
 168                         /* Version and help. */
 169                         case 'v':
 170                                 version();
 171                                 exit(0);
 172                         case 'H': case 'h': case '?':
 173                                 usage();
 174                                 exit(0);
 175                         case '-':
 176                                 if ( strcasecmp(pc.parameterArg, "help") == 0 ) {
 177                                         usage();
 178                                         exit(0);
 179                                 }
 180                                 else if ( strcasecmp(pc.parameterArg, "version") == 0 ) {
 181                                         version();
 182                                         exit(0);
 183                                 }
 184                                 else {
 185                                         error() << "--" << pc.parameterArg <<
 186                                                         " is an invalid argument" << endl;
 187                                         break;
 188                                 }
 189                         }
 190                         break;
 191
 192                 case ParamCheck::invalid:
 193                         error() << "-" << pc.parameter << " is an invalid argument" << endl;
 194                         break;
 195
 196                 case ParamCheck::noparam:
 197                         if ( *pc.curArg == 0 )
 198                                 error() << "a zero length input file name was given" << endl;
 199                         else if ( xmlInputFileName != 0 )
 200                                 error() << "more than one input file name was given" << endl;
 201                         else {
 202                                 /* OK, Remember the filename. */
 203                                 xmlInputFileName = pc.curArg;
 204                         }
 205                         break;
 206                 }
 207         }
 208
 209         /* Bail on above errors. */
 210         if ( gblErrorCount > 0 )
 211                 exit(1);
 212
 213         /* Open the input file for reading. */
 214         if ( xmlInputFileName != 0 ) {
 215                 /* Open the input file for reading. */
 216                 ifstream *inFile = new ifstream( xmlInputFileName );
 217                 inStream = inFile;
 218                 if ( ! inFile->is_open() )
 219                         error() << "could not open " << xmlInputFileName << " for reading" << endl;
 220         }
 221         else {
 222                 xmlInputFileName = "<stdin>";
 223                 inStream = &cin;
 224         }
 225
 226         /* Bail on above errors. */
 227         if ( gblErrorCount > 0 )
 228                 exit(1);
 229
 230         bool wantComplete = true;
 231         bool outputActive = true;
 232
 233         /* Parse the input! */
 234         xml_parse( *inStream, xmlInputFileName, outputActive, wantComplete );
 235
 236         /* If writing to a file, delete the ostream, causing it to flush.
 237          * Standard out is flushed automatically. */
 238         if ( outputFileName != 0 ) {
 239                 delete outStream;
 240                 delete outFilter;
 241         }
 242
 243         /* Finished, final check for errors.. */
 244         if ( gblErrorCount > 0 ) {
 245                 /* If we opened an output file, remove it. */
 246                 if ( outputFileName != 0 )
 247                         unlink( outputFileName );
 248                 exit(1);
 249         }
 250         return 0;
 251 }