rlgen-csharp/fsmcodegen.cpp

   1 /*
   2  *  Copyright 2001-2006 Adrian Thurston <thurston@cs.queensu.ca>
   3  *            2004 Erich Ocean <eric.ocean@ampede.com>
   4  *            2005 Alan West <alan@alanz.com>
   5  */
   6
   7 /*  This file is part of Ragel.
   8  *
   9  *  Ragel is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  Ragel is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with Ragel; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #include "rlgen-csharp.h"
  25 #include "fsmcodegen.h"
  26 #include "redfsm.h"
  27 #include "gendata.h"
  28 #include <sstream>
  29 #include <iomanip>
  30 #include <string>
  31 #include <assert.h>
  32
  33
  34 using std::ostream;
  35 using std::ostringstream;
  36 using std::string;
  37 using std::cerr;
  38 using std::endl;
  39
  40 void lineDirective( ostream &out, char *fileName, int line )
  41 {
  42         if ( noLineDirectives )
  43                 out << "/* ";
  44
  45         /* Write the preprocessor line info for to the input file. */
  46         out << "#line " << line  << " \"";
  47         for ( char *pc = fileName; *pc != 0; pc++ ) {
  48                 if ( *pc == '\\' )
  49                         out << "\\\\";
  50                 else
  51                         out << *pc;
  52         }
  53         out << '"';
  54
  55         if ( noLineDirectives )
  56                 out << " */";
  57
  58         out << '\n';
  59 }
  60
  61 void genLineDirective( ostream &out )
  62 {
  63         std::streambuf *sbuf = out.rdbuf();
  64         output_filter *filter = static_cast<output_filter*>(sbuf);
  65         lineDirective( out, filter->fileName, filter->line + 1 );
  66 }
  67
  68
  69 /* Init code gen with in parameters. */
  70 FsmCodeGen::FsmCodeGen( ostream &out )
  71 :
  72         CodeGenData(out)
  73 {
  74 }
  75
  76 unsigned int FsmCodeGen::arrayTypeSize( unsigned long maxVal )
  77 {
  78         long long maxValLL = (long long) maxVal;
  79         HostType *arrayType = keyOps->typeSubsumes( maxValLL );
  80         assert( arrayType != 0 );
  81         return arrayType->size;
  82 }
  83
  84 string FsmCodeGen::ARRAY_TYPE( unsigned long maxVal )
  85 {
  86         return ARRAY_TYPE( maxVal, false );
  87 }
  88
  89 string FsmCodeGen::ARRAY_TYPE( unsigned long maxVal, bool forceSigned )
  90 {
  91         long long maxValLL = (long long) maxVal;
  92         HostType *arrayType;
  93         if (forceSigned)
  94                 arrayType = keyOps->typeSubsumes(true, maxValLL);
  95         else
  96                 arrayType = keyOps->typeSubsumes( maxValLL );
  97         assert( arrayType != 0 );
  98
  99         string ret = arrayType->data1;
 100         if ( arrayType->data2 != 0 ) {
 101                 ret += " ";
 102                 ret += arrayType->data2;
 103         }
 104         return ret;
 105 }
 106
 107 /* Write out the fsm name. */
 108 string FsmCodeGen::FSM_NAME()
 109 {
 110         return fsmName;
 111 }
 112
 113 /* Emit the offset of the start state as a decimal integer. */
 114 string FsmCodeGen::START_STATE_ID()
 115 {
 116         ostringstream ret;
 117         ret << redFsm->startState->id;
 118         return ret.str();
 119 };
 120
 121 /* Write out the array of actions. */
 122 std::ostream &FsmCodeGen::ACTIONS_ARRAY()
 123 {
 124         out << "\t0, ";
 125         int totalActions = 1;
 126         for ( ActionTableMap::Iter act = redFsm->actionMap; act.lte(); act++ ) {
 127                 /* Write out the length, which will never be the last character. */
 128                 out << act->key.length() << ", ";
 129                 /* Put in a line break every 8 */
 130                 if ( totalActions++ % 8 == 7 )
 131                         out << "\n\t";
 132
 133                 for ( ActionTable::Iter item = act->key; item.lte(); item++ ) {
 134                         out << item->value->actionId;
 135                         if ( ! (act.last() && item.last()) )
 136                                 out << ", ";
 137
 138                         /* Put in a line break every 8 */
 139                         if ( totalActions++ % 8 == 7 )
 140                                 out << "\n\t";
 141                 }
 142         }
 143         out << "\n";
 144         return out;
 145 }
 146
 147
 148 string FsmCodeGen::ACCESS()
 149 {
 150         ostringstream ret;
 151         if ( accessExpr != 0 )
 152                 INLINE_LIST( ret, accessExpr, 0, false );
 153         return ret.str();
 154 }
 155
 156
 157 string FsmCodeGen::P()
 158 {
 159         ostringstream ret;
 160         if ( pExpr == 0 )
 161                 ret << "p";
 162         else {
 163                 ret << "(";
 164                 INLINE_LIST( ret, pExpr, 0, false );
 165                 ret << ")";
 166         }
 167         return ret.str();
 168 }
 169
 170 string FsmCodeGen::PE()
 171 {
 172         ostringstream ret;
 173         if ( peExpr == 0 )
 174                 ret << "pe";
 175         else {
 176                 ret << "(";
 177                 INLINE_LIST( ret, peExpr, 0, false );
 178                 ret << ")";
 179         }
 180         return ret.str();
 181 }
 182
 183 string FsmCodeGen::EOFV()
 184 {
 185         ostringstream ret;
 186         if ( eofExpr == 0 )
 187                 ret << "eof";
 188         else {
 189                 ret << "(";
 190                 INLINE_LIST( ret, eofExpr, 0, false );
 191                 ret << ")";
 192         }
 193         return ret.str();
 194 }
 195
 196 string FsmCodeGen::CS()
 197 {
 198         ostringstream ret;
 199         if ( csExpr == 0 )
 200                 ret << ACCESS() << "cs";
 201         else {
 202                 /* Emit the user supplied method of retrieving the key. */
 203                 ret << "(";
 204                 INLINE_LIST( ret, csExpr, 0, false );
 205                 ret << ")";
 206         }
 207         return ret.str();
 208 }
 209
 210 string FsmCodeGen::TOP()
 211 {
 212         ostringstream ret;
 213         if ( topExpr == 0 )
 214                 ret << ACCESS() + "top";
 215         else {
 216                 ret << "(";
 217                 INLINE_LIST( ret, topExpr, 0, false );
 218                 ret << ")";
 219         }
 220         return ret.str();
 221 }
 222
 223 string FsmCodeGen::STACK()
 224 {
 225         ostringstream ret;
 226         if ( stackExpr == 0 )
 227                 ret << ACCESS() + "stack";
 228         else {
 229                 ret << "(";
 230                 INLINE_LIST( ret, stackExpr, 0, false );
 231                 ret << ")";
 232         }
 233         return ret.str();
 234 }
 235
 236 string FsmCodeGen::ACT()
 237 {
 238         ostringstream ret;
 239         if ( actExpr == 0 )
 240                 ret << ACCESS() + "act";
 241         else {
 242                 ret << "(";
 243                 INLINE_LIST( ret, actExpr, 0, false );
 244                 ret << ")";
 245         }
 246         return ret.str();
 247 }
 248
 249 string FsmCodeGen::TOKSTART()
 250 {
 251         ostringstream ret;
 252         if ( tokstartExpr == 0 )
 253                 ret << ACCESS() + "ts";
 254         else {
 255                 ret << "(";
 256                 INLINE_LIST( ret, tokstartExpr, 0, false );
 257                 ret << ")";
 258         }
 259         return ret.str();
 260 }
 261
 262 string FsmCodeGen::TOKEND()
 263 {
 264         ostringstream ret;
 265         if ( tokendExpr == 0 )
 266                 ret << ACCESS() + "te";
 267         else {
 268                 ret << "(";
 269                 INLINE_LIST( ret, tokendExpr, 0, false );
 270                 ret << ")";
 271         }
 272         return ret.str();
 273 }
 274
 275 string FsmCodeGen::GET_WIDE_KEY()
 276 {
 277         if ( redFsm->anyConditions() )
 278                 return "_widec";
 279         else
 280                 return GET_KEY();
 281 }
 282
 283 string FsmCodeGen::GET_WIDE_KEY( RedStateAp *state )
 284 {
 285         if ( state->stateCondList.length() > 0 )
 286                 return "_widec";
 287         else
 288                 return GET_KEY();
 289 }
 290
 291 string FsmCodeGen::GET_KEY()
 292 {
 293         ostringstream ret;
 294         if ( getKeyExpr != 0 ) {
 295                 /* Emit the user supplied method of retrieving the key. */
 296                 ret << "(";
 297                 INLINE_LIST( ret, getKeyExpr, 0, false );
 298                 ret << ")";
 299         }
 300         else {
 301                 /* Expression for retrieving the key, use simple dereference. */
 302                 ret << "(*" << P() << ")";
 303         }
 304         return ret.str();
 305 }
 306
 307 /* Write out level number of tabs. Makes the nested binary search nice
 308  * looking. */
 309 string FsmCodeGen::TABS( int level )
 310 {
 311         string result;
 312         while ( level-- > 0 )
 313                 result += "\t";
 314         return result;
 315 }
 316
 317 /* Write out a key from the fsm code gen. Depends on wether or not the key is
 318  * signed. */
 319 string FsmCodeGen::KEY( Key key )
 320 {
 321         ostringstream ret;
 322         if ( keyOps->isSigned || !hostLang->explicitUnsigned )
 323                 ret << key.getVal();
 324         else
 325                 ret << (unsigned long) key.getVal() << 'u';
 326         return ret.str();
 327 }
 328
 329 string FsmCodeGen::ALPHA_KEY( Key key )
 330 {
 331         ostringstream ret;
 332         if (key.getVal() > 0xFFFF) {
 333                 ret << key.getVal();
 334         } else {
 335                 ret << "'\\u" << std::hex << std::setw(4) << std::setfill('0') <<
 336                         key.getVal() << "'";
 337         }
 338         //ret << "(char) " << key.getVal();
 339         return ret.str();
 340 }
 341
 342 void FsmCodeGen::EXEC( ostream &ret, InlineItem *item, int targState, int inFinish )
 343 {
 344         /* The parser gives fexec two children. The double brackets are for D
 345          * code. If the inline list is a single word it will get interpreted as a
 346          * C-style cast by the D compiler. */
 347         ret << "{" << P() << " = ((";
 348         INLINE_LIST( ret, item->children, targState, inFinish );
 349         ret << "))-1;}";
 350 }
 351
 352 void FsmCodeGen::LM_SWITCH( ostream &ret, InlineItem *item,
 353                 int targState, int inFinish )
 354 {
 355         ret <<
 356                 "       switch( " << ACT() << " ) {\n";
 357
 358         for ( InlineList::Iter lma = *item->children; lma.lte(); lma++ ) {
 359                 /* Write the case label, the action and the case break. */
 360                 if ( lma->lmId < 0 )
 361                         ret << "        default:\n";
 362                 else
 363                         ret << "        case " << lma->lmId << ":\n";
 364
 365                 /* Write the block and close it off. */
 366                 ret << "        {";
 367                 INLINE_LIST( ret, lma->children, targState, inFinish );
 368                 ret << "}\n";
 369
 370                 ret << "        break;\n";
 371         }
 372
 373         ret <<
 374                 "       }\n"
 375                 "\t";
 376 }
 377
 378 void FsmCodeGen::SET_ACT( ostream &ret, InlineItem *item )
 379 {
 380         ret << ACT() << " = " << item->lmId << ";";
 381 }
 382
 383 void FsmCodeGen::SET_TOKEND( ostream &ret, InlineItem *item )
 384 {
 385         /* The tokend action sets tokend. */
 386         ret << TOKEND() << " = " << P();
 387         if ( item->offset != 0 )
 388                 out << "+" << item->offset;
 389         out << ";";
 390 }
 391
 392 void FsmCodeGen::GET_TOKEND( ostream &ret, InlineItem *item )
 393 {
 394         ret << TOKEND();
 395 }
 396
 397 void FsmCodeGen::INIT_TOKSTART( ostream &ret, InlineItem *item )
 398 {
 399         ret << TOKSTART() << " = " << NULL_ITEM() << ";";
 400 }
 401
 402 void FsmCodeGen::INIT_ACT( ostream &ret, InlineItem *item )
 403 {
 404         ret << ACT() << " = 0;";
 405 }
 406
 407 void FsmCodeGen::SET_TOKSTART( ostream &ret, InlineItem *item )
 408 {
 409         ret << TOKSTART() << " = " << P() << ";";
 410 }
 411
 412 void FsmCodeGen::SUB_ACTION( ostream &ret, InlineItem *item,
 413                 int targState, bool inFinish )
 414 {
 415         if ( item->children->length() > 0 ) {
 416                 /* Write the block and close it off. */
 417                 ret << "{";
 418                 INLINE_LIST( ret, item->children, targState, inFinish );
 419                 ret << "}";
 420         }
 421 }
 422
 423
 424 /* Write out an inline tree structure. Walks the list and possibly calls out
 425  * to virtual functions than handle language specific items in the tree. */
 426 void FsmCodeGen::INLINE_LIST( ostream &ret, InlineList *inlineList,
 427                 int targState, bool inFinish )
 428 {
 429         for ( InlineList::Iter item = *inlineList; item.lte(); item++ ) {
 430                 switch ( item->type ) {
 431                 case InlineItem::Text:
 432                         ret << item->data;
 433                         break;
 434                 case InlineItem::Goto:
 435                         GOTO( ret, item->targState->id, inFinish );
 436                         break;
 437                 case InlineItem::Call:
 438                         CALL( ret, item->targState->id, targState, inFinish );
 439                         break;
 440                 case InlineItem::Next:
 441                         NEXT( ret, item->targState->id, inFinish );
 442                         break;
 443                 case InlineItem::Ret:
 444                         RET( ret, inFinish );
 445                         break;
 446                 case InlineItem::PChar:
 447                         ret << P();
 448                         break;
 449                 case InlineItem::Char:
 450                         ret << GET_KEY();
 451                         break;
 452                 case InlineItem::Hold:
 453                         ret << P() << "--;";
 454                         break;
 455                 case InlineItem::Exec:
 456                         EXEC( ret, item, targState, inFinish );
 457                         break;
 458                 case InlineItem::Curs:
 459                         CURS( ret, inFinish );
 460                         break;
 461                 case InlineItem::Targs:
 462                         TARGS( ret, inFinish, targState );
 463                         break;
 464                 case InlineItem::Entry:
 465                         ret << item->targState->id;
 466                         break;
 467                 case InlineItem::GotoExpr:
 468                         GOTO_EXPR( ret, item, inFinish );
 469                         break;
 470                 case InlineItem::CallExpr:
 471                         CALL_EXPR( ret, item, targState, inFinish );
 472                         break;
 473                 case InlineItem::NextExpr:
 474                         NEXT_EXPR( ret, item, inFinish );
 475                         break;
 476                 case InlineItem::LmSwitch:
 477                         LM_SWITCH( ret, item, targState, inFinish );
 478                         break;
 479                 case InlineItem::LmSetActId:
 480                         SET_ACT( ret, item );
 481                         break;
 482                 case InlineItem::LmSetTokEnd:
 483                         SET_TOKEND( ret, item );
 484                         break;
 485                 case InlineItem::LmGetTokEnd:
 486                         GET_TOKEND( ret, item );
 487                         break;
 488                 case InlineItem::LmInitTokStart:
 489                         INIT_TOKSTART( ret, item );
 490                         break;
 491                 case InlineItem::LmInitAct:
 492                         INIT_ACT( ret, item );
 493                         break;
 494                 case InlineItem::LmSetTokStart:
 495                         SET_TOKSTART( ret, item );
 496                         break;
 497                 case InlineItem::SubAction:
 498                         SUB_ACTION( ret, item, targState, inFinish );
 499                         break;
 500                 case InlineItem::Break:
 501                         BREAK( ret, targState );
 502                         break;
 503                 }
 504         }
 505 }
 506 /* Write out paths in line directives. Escapes any special characters. */
 507 string FsmCodeGen::LDIR_PATH( char *path )
 508 {
 509         ostringstream ret;
 510         for ( char *pc = path; *pc != 0; pc++ ) {
 511                 if ( *pc == '\\' )
 512                         ret << "\\\\";
 513                 else
 514                         ret << *pc;
 515         }
 516         return ret.str();
 517 }
 518
 519 void FsmCodeGen::ACTION( ostream &ret, Action *action, int targState, bool inFinish )
 520 {
 521         /* Write the preprocessor line info for going into the source file. */
 522         lineDirective( ret, sourceFileName, action->loc.line );
 523
 524         /* Write the block and close it off. */
 525         ret << "\t{";
 526         INLINE_LIST( ret, action->inlineList, targState, inFinish );
 527         ret << "}\n";
 528 }
 529
 530 void FsmCodeGen::CONDITION( ostream &ret, Action *condition )
 531 {
 532         ret << "\n";
 533         lineDirective( ret, sourceFileName, condition->loc.line );
 534         INLINE_LIST( ret, condition->inlineList, 0, false );
 535 }
 536
 537 string FsmCodeGen::ERROR_STATE()
 538 {
 539         ostringstream ret;
 540         if ( redFsm->errState != 0 )
 541                 ret << redFsm->errState->id;
 542         else
 543                 ret << "-1";
 544         return ret.str();
 545 }
 546
 547 string FsmCodeGen::FIRST_FINAL_STATE()
 548 {
 549         ostringstream ret;
 550         if ( redFsm->firstFinState != 0 )
 551                 ret << redFsm->firstFinState->id;
 552         else
 553                 ret << redFsm->nextStateId;
 554         return ret.str();
 555 }
 556
 557 void FsmCodeGen::writeInit()
 558 {
 559         out << "        {\n";
 560
 561         if ( writeCS )
 562                 out << "\t" << CS() << " = " << START() << ";\n";
 563
 564         /* If there are any calls, then the stack top needs initialization. */
 565         if ( redFsm->anyActionCalls() || redFsm->anyActionRets() )
 566                 out << "\t" << TOP() << " = 0;\n";
 567
 568         if ( hasLongestMatch ) {
 569                 out <<
 570                         "       " << TOKSTART() << " = " << NULL_ITEM() << ";\n"
 571                         "       " << TOKEND() << " = " << NULL_ITEM() << ";\n"
 572                         "       " << ACT() << " = 0;\n";
 573         }
 574         out << "        }\n";
 575 }
 576
 577 string FsmCodeGen::DATA_PREFIX()
 578 {
 579         if ( dataPrefix )
 580                 return FSM_NAME() + "_";
 581         return "";
 582 }
 583
 584 /* Emit the alphabet data type. */
 585 string FsmCodeGen::ALPH_TYPE()
 586 {
 587         string ret = keyOps->alphType->data1;
 588         if ( keyOps->alphType->data2 != 0 ) {
 589                 ret += " ";
 590                 ret += + keyOps->alphType->data2;
 591         }
 592         return ret;
 593 }
 594
 595 /* Emit the alphabet data type. */
 596 string FsmCodeGen::WIDE_ALPH_TYPE()
 597 {
 598         string ret;
 599         if ( redFsm->maxKey <= keyOps->maxKey )
 600                 ret = ALPH_TYPE();
 601         else {
 602                 long long maxKeyVal = redFsm->maxKey.getLongLong();
 603                 HostType *wideType = keyOps->typeSubsumes( keyOps->isSigned, maxKeyVal );
 604                 assert( wideType != 0 );
 605
 606                 ret = wideType->data1;
 607                 if ( wideType->data2 != 0 ) {
 608                         ret += " ";
 609                         ret += wideType->data2;
 610                 }
 611         }
 612         return ret;
 613 }
 614
 615 void FsmCodeGen::STATE_IDS()
 616 {
 617         if ( redFsm->startState != 0 )
 618                 STATIC_VAR( "int", START() ) << " = " << START_STATE_ID() << ";\n";
 619
 620         if ( writeFirstFinal )
 621                 STATIC_VAR( "int" , FIRST_FINAL() ) << " = " << FIRST_FINAL_STATE() << ";\n";
 622
 623         if ( writeErr )
 624                 STATIC_VAR( "int", ERROR() ) << " = " << ERROR_STATE() << ";\n";
 625
 626         out << "\n";
 627
 628         if ( entryPointNames.length() > 0 ) {
 629                 for ( EntryNameVect::Iter en = entryPointNames; en.lte(); en++ ) {
 630                         STATIC_VAR( "int", DATA_PREFIX() + "en_" + *en ) <<
 631                                         " = " << entryPointIds[en.pos()] << ";\n";
 632                 }
 633                 out << "\n";
 634         }
 635 }
 636
 637 /*
 638  * C# Specific
 639  */
 640 string CSharpCodeGen::GET_KEY()
 641 {
 642         ostringstream ret;
 643         if ( getKeyExpr != 0 ) {
 644                 /* Emit the user supplied method of retrieving the key. */
 645                 ret << "(";
 646                 INLINE_LIST( ret, getKeyExpr, 0, false );
 647                 ret << ")";
 648         }
 649         else {
 650                 /* Expression for retrieving the key, use simple dereference. */
 651                 ret << "data[" << P() << "]";
 652         }
 653         return ret.str();
 654 }
 655 string CSharpCodeGen::NULL_ITEM()
 656 {
 657         return "-1";
 658 }
 659
 660 string CSharpCodeGen::POINTER()
 661 {
 662         // XXX C# has no pointers
 663         // multiple items seperated by commas can also be pointer types.
 664         return " ";
 665 }
 666
 667 string CSharpCodeGen::PTR_CONST()
 668 {
 669         return "";
 670 }
 671
 672 std::ostream &CSharpCodeGen::OPEN_ARRAY( string type, string name )
 673 {
 674         out << "static readonly " << type << "[] " << name << " =  ";
 675         /*
 676         if (type == "char")
 677                 out << "Encoding.ASCII.Get";
 678         else */
 679                 out << "new " << type << " [] {\n";
 680         return out;
 681 }
 682
 683 std::ostream &CSharpCodeGen::CLOSE_ARRAY()
 684 {
 685         return out << "};\n";
 686 }
 687
 688 std::ostream &CSharpCodeGen::STATIC_VAR( string type, string name )
 689 {
 690         out << "const " << type << " " << name;
 691         return out;
 692 }
 693
 694 string CSharpCodeGen::ARR_OFF( string ptr, string offset )
 695 {
 696         // XXX C# can't do pointer arithmetic
 697         return "&" + ptr + "[" + offset + "]";
 698 }
 699
 700 string CSharpCodeGen::CAST( string type )
 701 {
 702         return "(" + type + ")";
 703 }
 704
 705 string CSharpCodeGen::UINT( )
 706 {
 707         return "uint";
 708 }
 709
 710 std::ostream &CSharpCodeGen::SWITCH_DEFAULT()
 711 {
 712         out << "                default: break;\n";
 713         return out;
 714 }
 715
 716 string CSharpCodeGen::CTRL_FLOW()
 717 {
 718         return "if (true) ";
 719 }
 720
 721 void CSharpCodeGen::writeExports()
 722 {
 723         if ( exportList.length() > 0 ) {
 724                 for ( ExportList::Iter ex = exportList; ex.lte(); ex++ ) {
 725                         out << "const " << ALPH_TYPE() << " " << DATA_PREFIX() <<
 726                                         "ex_" << ex->name << " = " << KEY(ex->key) << ";\n";
 727                 }
 728                 out << "\n";
 729         }
 730 }
 731
 732 /*
 733  * End C#-specific code.
 734  */
 735
 736 void FsmCodeGen::finishRagelDef()
 737 {
 738         if ( codeStyle == GenGoto || codeStyle == GenFGoto ||
 739                         codeStyle == GenIpGoto || codeStyle == GenSplit )
 740         {
 741                 /* For directly executable machines there is no required state
 742                  * ordering. Choose a depth-first ordering to increase the
 743                  * potential for fall-throughs. */
 744                 redFsm->depthFirstOrdering();
 745         }
 746         else {
 747                 /* The frontend will do this for us, but it may be a good idea to
 748                  * force it if the intermediate file is edited. */
 749                 redFsm->sortByStateId();
 750         }
 751
 752         /* Choose default transitions and the single transition. */
 753         redFsm->chooseDefaultSpan();
 754
 755         /* Maybe do flat expand, otherwise choose single. */
 756         if ( codeStyle == GenFlat || codeStyle == GenFFlat )
 757                 redFsm->makeFlat();
 758         else
 759                 redFsm->chooseSingle();
 760
 761         /* If any errors have occured in the input file then don't write anything. */
 762         if ( gblErrorCount > 0 )
 763                 return;
 764
 765         if ( codeStyle == GenSplit )
 766                 redFsm->partitionFsm( numSplitPartitions );
 767
 768         if ( codeStyle == GenIpGoto || codeStyle == GenSplit )
 769                 redFsm->setInTrans();
 770
 771         /* Anlayze Machine will find the final action reference counts, among
 772          * other things. We will use these in reporting the usage
 773          * of fsm directives in action code. */
 774         analyzeMachine();
 775
 776         /* Determine if we should use indicies. */
 777         calcIndexSize();
 778 }
 779
 780 ostream &FsmCodeGen::source_warning( const InputLoc &loc )
 781 {
 782         cerr << sourceFileName << ":" << loc.line << ":" << loc.col << ": warning: ";
 783         return cerr;
 784 }
 785
 786 ostream &FsmCodeGen::source_error( const InputLoc &loc )
 787 {
 788         gblErrorCount += 1;
 789         assert( sourceFileName != 0 );
 790         cerr << sourceFileName << ":" << loc.line << ":" << loc.col << ": ";
 791         return cerr;
 792 }
 793