rlgen-dot/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 "common.h"
  30 #include "rlgen-dot.h"
  31 #include "xmlparse.h"
  32 #include "pcheck.h"
  33 #include "vector.h"
  34 #include "version.h"
  35 #include "gvdotgen.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 displayPrintables = 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 "output:\n"
  68 "   -p                    Display printable characters on labels\n"
  69         ;
  70 }
  71
  72 /* Print version information. */
  73 void version()
  74 {
  75         cout << "Ragel Code Generator for Graphviz" << endl <<
  76                         "Version " VERSION << ", " PUBDATE << endl <<
  77                         "Copyright (c) 2001-2007 by Adrian Thurston" << endl;
  78 }
  79
  80 ostream &error()
  81 {
  82         gblErrorCount += 1;
  83         cerr << PROGNAME ": ";
  84         return cerr;
  85 }
  86
  87 /*
  88  * Callbacks invoked by the XML data parser.
  89  */
  90
  91 /* Invoked by the parser when the root element is opened. */
  92 ostream *openOutput( char *inputFile )
  93 {
  94         /* Make sure we are not writing to the same file as the input file. */
  95         if ( outputFileName != 0 && strcmp( inputFile, outputFileName  ) == 0 ) {
  96                 error() << "output file \"" << outputFileName  <<
  97                                 "\" is the same as the input file" << endl;
  98         }
  99
 100         if ( outputFileName != 0 ) {
 101                 /* Create the filter on the output and open it. */
 102                 outFilter = new output_filter( outputFileName );
 103                 outFilter->open( outputFileName, ios::out|ios::trunc );
 104                 if ( !outFilter->is_open() ) {
 105                         error() << "error opening " << outputFileName << " for writing" << endl;
 106                         exit(1);
 107                 }
 108
 109                 /* Open the output stream, attaching it to the filter. */
 110                 outStream = new ostream( outFilter );
 111         }
 112         else {
 113                 /* Writing out ot std out. */
 114                 outStream = &cout;
 115         }
 116         return outStream;
 117 }
 118
 119 /* Invoked by the parser when a ragel definition is opened. */
 120 CodeGenData *makeCodeGen( char *sourceFileName, char *fsmName,
 121                 ostream &out, bool wantComplete )
 122 {
 123         CodeGenData *codeGen = new GraphvizDotGen(out);
 124
 125         codeGen->sourceFileName = sourceFileName;
 126         codeGen->fsmName = fsmName;
 127         codeGen->wantComplete = wantComplete;
 128
 129         return codeGen;
 130 }
 131
 132
 133 /* Main, process args and call yyparse to start scanning input. */
 134 int main(int argc, char **argv)
 135 {
 136         ParamCheck pc("o:pvHh?-:", argc, argv);
 137         char *xmlInputFileName = 0;
 138
 139         while ( pc.check() ) {
 140                 switch ( pc.state ) {
 141                 case ParamCheck::match:
 142                         switch ( pc.parameter ) {
 143                         /* Output. */
 144                         case 'o':
 145                                 if ( *pc.parameterArg == 0 )
 146                                         error() << "a zero length output file name was given" << endl;
 147                                 else if ( outputFileName != 0 )
 148                                         error() << "more than one output file name was given" << endl;
 149                                 else {
 150                                         /* Ok, remember the output file name. */
 151                                         outputFileName = pc.parameterArg;
 152                                 }
 153                                 break;
 154
 155                         case 'p':
 156                                 displayPrintables = true;
 157                                 break;
 158
 159                         /* Version and help. */
 160                         case 'v':
 161                                 version();
 162                                 exit(0);
 163                         case 'H': case 'h': case '?':
 164                                 usage();
 165                                 exit(0);
 166                         case '-':
 167                                 if ( strcasecmp(pc.parameterArg, "help") == 0 ) {
 168                                         usage();
 169                                         exit(0);
 170                                 }
 171                                 else if ( strcasecmp(pc.parameterArg, "version") == 0 ) {
 172                                         version();
 173                                         exit(0);
 174                                 }
 175                                 else {
 176                                         error() << "--" << pc.parameterArg <<
 177                                                         " is an invalid argument" << endl;
 178                                         break;
 179                                 }
 180                         }
 181                         break;
 182
 183                 case ParamCheck::invalid:
 184                         error() << "-" << pc.parameter << " is an invalid argument" << endl;
 185                         break;
 186
 187                 case ParamCheck::noparam:
 188                         if ( *pc.curArg == 0 )
 189                                 error() << "a zero length input file name was given" << endl;
 190                         else if ( xmlInputFileName != 0 )
 191                                 error() << "more than one input file name was given" << endl;
 192                         else {
 193                                 /* OK, Remember the filename. */
 194                                 xmlInputFileName = pc.curArg;
 195                         }
 196                         break;
 197                 }
 198         }
 199
 200         /* Bail on above errors. */
 201         if ( gblErrorCount > 0 )
 202                 exit(1);
 203
 204         /* Open the input file for reading. */
 205         if ( xmlInputFileName != 0 ) {
 206                 /* Open the input file for reading. */
 207                 ifstream *inFile = new ifstream( xmlInputFileName );
 208                 inStream = inFile;
 209                 if ( ! inFile->is_open() )
 210                         error() << "could not open " << xmlInputFileName << " for reading" << endl;
 211         }
 212         else {
 213                 xmlInputFileName = strdup("<stdin>");
 214                 inStream = &cin;
 215         }
 216
 217         /* Bail on above errors. */
 218         if ( gblErrorCount > 0 )
 219                 exit(1);
 220
 221         bool wantComplete = false;
 222         bool outputActive = false;
 223
 224         /* Parse the input! */
 225         xml_parse( *inStream, xmlInputFileName, outputActive, wantComplete );
 226
 227         /* If writing to a file, delete the ostream, causing it to flush.
 228          * Standard out is flushed automatically. */
 229         if ( outputFileName != 0 ) {
 230                 delete outStream;
 231                 delete outFilter;
 232         }
 233
 234         /* Finished, final check for errors.. */
 235         if ( gblErrorCount > 0 ) {
 236                 /* If we opened an output file, remove it. */
 237                 if ( outputFileName != 0 )
 238                         unlink( outputFileName );
 239                 exit(1);
 240         }
 241         return 0;
 242 }