rlgen-csharp/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-csharp.h"
  31 #include "xmlparse.h"
  32 #include "pcheck.h"
  33 #include "vector.h"
  34 #include "version.h"
  35
  36 /* Code generators. */
  37 #include "tabcodegen.h"
  38 #include "ftabcodegen.h"
  39 #include "flatcodegen.h"
  40 #include "fflatcodegen.h"
  41 #include "gotocodegen.h"
  42 #include "fgotocodegen.h"
  43 #include "ipgotocodegen.h"
  44 #include "splitcodegen.h"
  45
  46 using std::istream;
  47 using std::ifstream;
  48 using std::ostream;
  49 using std::ios;
  50 using std::cin;
  51 using std::cout;
  52 using std::cerr;
  53 using std::endl;
  54
  55 /* Target language and output style. */
  56 extern CodeStyleEnum codeStyle;
  57
  58 /* Io globals. */
  59 extern istream *inStream;
  60 extern ostream *outStream;
  61 extern output_filter *outFilter;
  62 extern const char *outputFileName;
  63
  64 /* Graphviz dot file generation. */
  65 extern bool graphvizDone;
  66
  67 extern int numSplitPartitions;
  68 extern bool noLineDirectives;
  69
  70 /* Print a summary of the options. */
  71 void csharp_usage()
  72 {
  73         cout <<
  74 "usage: " PROGNAME " [options] file\n"
  75 "general:\n"
  76 "   -h, -H, -?, --help    Print this usage and exit\n"
  77 "   -v, --version         Print version information and exit\n"
  78 "   -o <file>             Write output to <file>\n"
  79 "code generation options:\n"
  80 "   -L                    Inhibit writing of #line directives\n"
  81 "generated code style:\n"
  82 "   -T0                   Table driven FSM (default)\n"
  83 "   -T1                   Faster table driven FSM\n"
  84 "   -F0                   Flat table driven FSM\n"
  85 "   -F1                   Faster flat table-driven FSM\n"
  86 "   -G0                   Goto-driven FSM\n"
  87 "   -G1                   Faster goto-driven FSM\n"
  88         ;
  89 }
  90
  91 /* Print version information. */
  92 void csharp_version()
  93 {
  94         cout << "Ragel Code Generator for C#" << endl <<
  95                         "Version " VERSION << ", " PUBDATE << endl <<
  96                         "Copyright (c) 2001-2007 by Adrian Thurston" << endl;
  97 }
  98
  99 ostream &csharp_error()
 100 {
 101         gblErrorCount += 1;
 102         cerr << PROGNAME ": ";
 103         return cerr;
 104 }
 105
 106 /*
 107  * Callbacks invoked by the XML data parser.
 108  */
 109
 110 /* Invoked by the parser when the root element is opened. */
 111 ostream *csharpOpenOutput( char *inputFile )
 112 {
 113         if ( hostLang->lang != HostLang::CSharp ) {
 114                 csharp_error() << "this code generator is for C# only" << endl;
 115                 exit(1);
 116         }
 117
 118         /* If the output format is code and no output file name is given, then
 119          * make a default. */
 120         if ( outputFileName == 0 ) {
 121                 char *ext = findFileExtension( inputFile );
 122                 if ( ext != 0 && strcmp( ext, ".rh" ) == 0 )
 123                         outputFileName = fileNameFromStem( inputFile, ".h" );
 124                 else
 125                         outputFileName = fileNameFromStem( inputFile, ".cs" );
 126         }
 127
 128         /* Make sure we are not writing to the same file as the input file. */
 129         if ( outputFileName != 0 && strcmp( inputFile, outputFileName  ) == 0 ) {
 130                 csharp_error() << "output file \"" << outputFileName  <<
 131                                 "\" is the same as the input file" << endl;
 132         }
 133
 134         if ( outputFileName != 0 ) {
 135                 /* Create the filter on the output and open it. */
 136                 outFilter = new output_filter( outputFileName );
 137                 outFilter->open( outputFileName, ios::out|ios::trunc );
 138                 if ( !outFilter->is_open() ) {
 139                         csharp_error() << "error opening " << outputFileName << " for writing" << endl;
 140                         exit(1);
 141                 }
 142
 143                 /* Open the output stream, attaching it to the filter. */
 144                 outStream = new ostream( outFilter );
 145         }
 146         else {
 147                 /* Writing out ot std out. */
 148                 outStream = &cout;
 149         }
 150         return outStream;
 151 }
 152
 153 /* Invoked by the parser when a ragel definition is opened. */
 154 CodeGenData *csharpMakeCodeGen( char *sourceFileName, char *fsmName,
 155                 ostream &out, bool wantComplete )
 156 {
 157         CodeGenData *codeGen = 0;
 158
 159         switch ( codeStyle ) {
 160         case GenTables:
 161                 codeGen = new CSharpTabCodeGen(out);
 162                 break;
 163         case GenFTables:
 164                 codeGen = new CSharpFTabCodeGen(out);
 165                 break;
 166         case GenFlat:
 167                 codeGen = new CSharpFlatCodeGen(out);
 168                 break;
 169         case GenFFlat:
 170                 codeGen = new CSharpFFlatCodeGen(out);
 171                 break;
 172         case GenGoto:
 173                 codeGen = new CSharpGotoCodeGen(out);
 174                 break;
 175         case GenFGoto:
 176                 codeGen = new CSharpFGotoCodeGen(out);
 177                 break;
 178         case GenIpGoto:
 179                 codeGen = new CSharpIpGotoCodeGen(out);
 180                 break;
 181         case GenSplit:
 182                 codeGen = new CSharpSplitCodeGen(out);
 183                 break;
 184         }
 185
 186         codeGen->sourceFileName = sourceFileName;
 187         codeGen->fsmName = fsmName;
 188         codeGen->wantComplete = wantComplete;
 189
 190         return codeGen;
 191 }
 192
 193 /* Main, process args and call yyparse to start scanning input. */
 194 int csharp_main( const char *xmlInputFileName )
 195 {
 196         /* Open the input file for reading. */
 197         ifstream *inFile = new ifstream( xmlInputFileName );
 198         inStream = inFile;
 199         if ( ! inFile->is_open() )
 200                 csharp_error() << "could not open " << xmlInputFileName << " for reading" << endl;
 201
 202         /* Bail on above errors. */
 203         if ( gblErrorCount > 0 )
 204                 exit(1);
 205
 206         bool wantComplete = true;
 207         bool outputActive = true;
 208
 209         /* Parse the input! */
 210         xml_parse( *inStream, xmlInputFileName, outputActive, wantComplete );
 211
 212         /* If writing to a file, delete the ostream, causing it to flush.
 213          * Standard out is flushed automatically. */
 214         if ( outputFileName != 0 ) {
 215                 delete outStream;
 216                 delete outFilter;
 217         }
 218
 219         /* Finished, final check for errors.. */
 220         if ( gblErrorCount > 0 ) {
 221                 /* If we opened an output file, remove it. */
 222                 if ( outputFileName != 0 )
 223                         unlink( outputFileName );
 224                 exit(1);
 225         }
 226         return 0;
 227 }