rlgen-cd/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-cd.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 CodeStyleEnum codeStyle = GenTables;
  57
  58 /* Io globals. */
  59 istream *inStream = 0;
  60 ostream *outStream = 0;
  61 output_filter *outFilter = 0;
  62 char *outputFileName = 0;
  63
  64 /* Graphviz dot file generation. */
  65 bool graphvizDone = false;
  66
  67 int numSplitPartitions = 0;
  68 bool noLineDirectives = false;
  69 bool printPrintables = false;
  70
  71 /* Print a summary of the options. */
  72 void usage()
  73 {
  74         cout <<
  75 "usage: " PROGNAME " [options] file\n"
  76 "general:\n"
  77 "   -h, -H, -?, --help    Print this usage and exit\n"
  78 "   -v, --version         Print version information and exit\n"
  79 "   -o <file>             Write output to <file>\n"
  80 "code generation options:\n"
  81 "   -L                    Inhibit writing of #line directives\n"
  82 "generated code style:\n"
  83 "   -T0                   Table driven FSM (default)\n"
  84 "   -T1                   Faster table driven FSM\n"
  85 "   -F0                   Flat table driven FSM\n"
  86 "   -F1                   Faster flat table-driven FSM\n"
  87 "   -G0                   Goto-driven FSM\n"
  88 "   -G1                   Faster goto-driven FSM\n"
  89 "   -G2                   Really fast goto-driven FSM\n"
  90 "   -P<N>                 N-Way Split really fast goto-driven FSM\n"
  91         ;
  92 }
  93
  94 /* Print version information. */
  95 void version()
  96 {
  97         cout << "Ragel Code Generator for C, C++, Objective-C and D" << endl <<
  98                         "Version " VERSION << ", " PUBDATE << endl <<
  99                         "Copyright (c) 2001-2007 by Adrian Thurston" << endl;
 100 }
 101
 102 ostream &error()
 103 {
 104         gblErrorCount += 1;
 105         cerr << PROGNAME ": ";
 106         return cerr;
 107 }
 108
 109 /*
 110  * Callbacks invoked by the XML data parser.
 111  */
 112
 113 /* Invoked by the parser when the root element is opened. */
 114 ostream *openOutput( char *inputFile )
 115 {
 116         if ( hostLang->lang != HostLang::C && hostLang->lang != HostLang::D ) {
 117                 error() << "this code generator is for C and D only" << endl;
 118                 exit(1);
 119         }
 120
 121         /* If the output format is code and no output file name is given, then
 122          * make a default. */
 123         if ( outputFileName == 0 ) {
 124                 char *ext = findFileExtension( inputFile );
 125                 if ( ext != 0 && strcmp( ext, ".rh" ) == 0 )
 126                         outputFileName = fileNameFromStem( inputFile, ".h" );
 127                 else {
 128                         const char *defExtension = 0;
 129                         switch ( hostLang->lang ) {
 130                                 case HostLang::C: defExtension = ".c"; break;
 131                                 case HostLang::D: defExtension = ".d"; break;
 132                                 default: break;
 133                         }
 134                         outputFileName = fileNameFromStem( inputFile, defExtension );
 135                 }
 136         }
 137
 138         /* Make sure we are not writing to the same file as the input file. */
 139         if ( outputFileName != 0 && strcmp( inputFile, outputFileName  ) == 0 ) {
 140                 error() << "output file \"" << outputFileName  <<
 141                                 "\" is the same as the input file" << endl;
 142         }
 143
 144         if ( outputFileName != 0 ) {
 145                 /* Create the filter on the output and open it. */
 146                 outFilter = new output_filter( outputFileName );
 147                 outFilter->open( outputFileName, ios::out|ios::trunc );
 148                 if ( !outFilter->is_open() ) {
 149                         error() << "error opening " << outputFileName << " for writing" << endl;
 150                         exit(1);
 151                 }
 152
 153                 /* Open the output stream, attaching it to the filter. */
 154                 outStream = new ostream( outFilter );
 155         }
 156         else {
 157                 /* Writing out ot std out. */
 158                 outStream = &cout;
 159         }
 160         return outStream;
 161 }
 162
 163 /* Invoked by the parser when a ragel definition is opened. */
 164 CodeGenData *makeCodeGen( char *sourceFileName, char *fsmName,
 165                 ostream &out, bool wantComplete )
 166 {
 167         CodeGenData *codeGen = 0;
 168         switch ( hostLang->lang ) {
 169         case HostLang::C:
 170                 switch ( codeStyle ) {
 171                 case GenTables:
 172                         codeGen = new CTabCodeGen(out);
 173                         break;
 174                 case GenFTables:
 175                         codeGen = new CFTabCodeGen(out);
 176                         break;
 177                 case GenFlat:
 178                         codeGen = new CFlatCodeGen(out);
 179                         break;
 180                 case GenFFlat:
 181                         codeGen = new CFFlatCodeGen(out);
 182                         break;
 183                 case GenGoto:
 184                         codeGen = new CGotoCodeGen(out);
 185                         break;
 186                 case GenFGoto:
 187                         codeGen = new CFGotoCodeGen(out);
 188                         break;
 189                 case GenIpGoto:
 190                         codeGen = new CIpGotoCodeGen(out);
 191                         break;
 192                 case GenSplit:
 193                         codeGen = new CSplitCodeGen(out);
 194                         break;
 195                 }
 196                 break;
 197
 198         case HostLang::D:
 199                 switch ( codeStyle ) {
 200                 case GenTables:
 201                         codeGen = new DTabCodeGen(out);
 202                         break;
 203                 case GenFTables:
 204                         codeGen = new DFTabCodeGen(out);
 205                         break;
 206                 case GenFlat:
 207                         codeGen = new DFlatCodeGen(out);
 208                         break;
 209                 case GenFFlat:
 210                         codeGen = new DFFlatCodeGen(out);
 211                         break;
 212                 case GenGoto:
 213                         codeGen = new DGotoCodeGen(out);
 214                         break;
 215                 case GenFGoto:
 216                         codeGen = new DFGotoCodeGen(out);
 217                         break;
 218                 case GenIpGoto:
 219                         codeGen = new DIpGotoCodeGen(out);
 220                         break;
 221                 case GenSplit:
 222                         codeGen = new DSplitCodeGen(out);
 223                         break;
 224                 }
 225                 break;
 226
 227         default: break;
 228         }
 229
 230         codeGen->sourceFileName = sourceFileName;
 231         codeGen->fsmName = fsmName;
 232         codeGen->wantComplete = wantComplete;
 233
 234         return codeGen;
 235 }
 236
 237
 238
 239 /* Main, process args and call yyparse to start scanning input. */
 240 int main(int argc, char **argv)
 241 {
 242         ParamCheck pc("-:Hh?vLo:T:F:G:P:", argc, argv);
 243         char *xmlInputFileName = 0;
 244
 245         while ( pc.check() ) {
 246                 switch ( pc.state ) {
 247                 case ParamCheck::match:
 248                         switch ( pc.parameter ) {
 249                         /* Output. */
 250                         case 'o':
 251                                 if ( *pc.paramArg == 0 )
 252                                         error() << "a zero length output file name was given" << endl;
 253                                 else if ( outputFileName != 0 )
 254                                         error() << "more than one output file name was given" << endl;
 255                                 else {
 256                                         /* Ok, remember the output file name. */
 257                                         outputFileName = pc.paramArg;
 258                                 }
 259                                 break;
 260
 261                         case 'L':
 262                                 noLineDirectives = true;
 263                                 break;
 264
 265                         /* Code style. */
 266                         case 'T':
 267                                 if ( pc.paramArg[0] == '0' )
 268                                         codeStyle = GenTables;
 269                                 else if ( pc.paramArg[0] == '1' )
 270                                         codeStyle = GenFTables;
 271                                 else {
 272                                         error() << "-T" << pc.paramArg[0] <<
 273                                                         " is an invalid argument" << endl;
 274                                         exit(1);
 275                                 }
 276                                 break;
 277                         case 'F':
 278                                 if ( pc.paramArg[0] == '0' )
 279                                         codeStyle = GenFlat;
 280                                 else if ( pc.paramArg[0] == '1' )
 281                                         codeStyle = GenFFlat;
 282                                 else {
 283                                         error() << "-F" << pc.paramArg[0] <<
 284                                                         " is an invalid argument" << endl;
 285                                         exit(1);
 286                                 }
 287                                 break;
 288                         case 'G':
 289                                 if ( pc.paramArg[0] == '0' )
 290                                         codeStyle = GenGoto;
 291                                 else if ( pc.paramArg[0] == '1' )
 292                                         codeStyle = GenFGoto;
 293                                 else if ( pc.paramArg[0] == '2' )
 294                                         codeStyle = GenIpGoto;
 295                                 else {
 296                                         error() << "-G" << pc.paramArg[0] <<
 297                                                         " is an invalid argument" << endl;
 298                                         exit(1);
 299                                 }
 300                                 break;
 301                         case 'P':
 302                                 codeStyle = GenSplit;
 303                                 numSplitPartitions = atoi( pc.paramArg );
 304                                 break;
 305
 306                         /* Version and help. */
 307                         case 'v':
 308                                 version();
 309                                 exit(0);
 310                         case 'H': case 'h': case '?':
 311                                 usage();
 312                                 exit(0);
 313                         case '-':
 314                                 if ( strcmp(pc.paramArg, "help") == 0 ) {
 315                                         usage();
 316                                         exit(0);
 317                                 }
 318                                 else if ( strcmp(pc.paramArg, "version") == 0 ) {
 319                                         version();
 320                                         exit(0);
 321                                 }
 322                                 else {
 323                                         error() << "--" << pc.paramArg <<
 324                                                         " is an invalid argument" << endl;
 325                                         break;
 326                                 }
 327                         }
 328                         break;
 329
 330                 case ParamCheck::invalid:
 331                         error() << "-" << pc.parameter << " is an invalid argument" << endl;
 332                         break;
 333
 334                 case ParamCheck::noparam:
 335                         if ( *pc.curArg == 0 )
 336                                 error() << "a zero length input file name was given" << endl;
 337                         else if ( xmlInputFileName != 0 )
 338                                 error() << "more than one input file name was given" << endl;
 339                         else {
 340                                 /* OK, Remember the filename. */
 341                                 xmlInputFileName = pc.curArg;
 342                         }
 343                         break;
 344                 }
 345         }
 346
 347         /* Bail on above errors. */
 348         if ( gblErrorCount > 0 )
 349                 exit(1);
 350
 351         /* Open the input file for reading. */
 352         if ( xmlInputFileName != 0 ) {
 353                 /* Open the input file for reading. */
 354                 ifstream *inFile = new ifstream( xmlInputFileName );
 355                 inStream = inFile;
 356                 if ( ! inFile->is_open() )
 357                         error() << "could not open " << xmlInputFileName << " for reading" << endl;
 358         }
 359         else {
 360                 xmlInputFileName = strdup("<stdin>");
 361                 inStream = &cin;
 362         }
 363
 364         /* Bail on above errors. */
 365         if ( gblErrorCount > 0 )
 366                 exit(1);
 367
 368         bool wantComplete = true;
 369         bool outputActive = true;
 370
 371         /* Parse the input! */
 372         xml_parse( *inStream, xmlInputFileName, outputActive, wantComplete );
 373
 374         /* If writing to a file, delete the ostream, causing it to flush.
 375          * Standard out is flushed automatically. */
 376         if ( outputFileName != 0 ) {
 377                 delete outStream;
 378                 delete outFilter;
 379         }
 380
 381         /* Finished, final check for errors.. */
 382         if ( gblErrorCount > 0 ) {
 383                 /* If we opened an output file, remove it. */
 384                 if ( outputFileName != 0 )
 385                         unlink( outputFileName );
 386                 exit(1);
 387         }
 388         return 0;
 389 }