rlgen-cd/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-cd.h"
  25 #include "fsmcodegen.h"
  26 #include "redfsm.h"
  27 #include "gendata.h"
  28 #include <sstream>
  29 #include <string>
  30 #include <assert.h>
  31
  32
  33 using std::ostream;
  34 using std::ostringstream;
  35 using std::string;
  36 using std::cerr;
  37 using std::endl;
  38
  39 void cdLineDirective( ostream &out, const char *fileName, int line )
  40 {
  41         if ( noLineDirectives )
  42                 out << "/* ";
  43
  44         /* Write the preprocessor line info for to the input file. */
  45         out << "#line " << line  << " \"";
  46         for ( const char *pc = fileName; *pc != 0; pc++ ) {
  47                 if ( *pc == '\\' )
  48                         out << "\\\\";
  49                 else
  50                         out << *pc;
  51         }
  52         out << '"';
  53
  54         if ( noLineDirectives )
  55                 out << " */";
  56
  57         out << '\n';
  58 }
  59
  60 void FsmCodeGen::genLineDirective( ostream &out )
  61 {
  62         std::streambuf *sbuf = out.rdbuf();
  63         output_filter *filter = static_cast<output_filter*>(sbuf);
  64         cdLineDirective( out, filter->fileName, filter->line + 1 );
  65 }
  66
  67
  68 /* Init code gen with in parameters. */
  69 FsmCodeGen::FsmCodeGen( ostream &out )
  70 :
  71         CodeGenData(out)
  72 {
  73 }
  74
  75 unsigned int FsmCodeGen::arrayTypeSize( unsigned long maxVal )
  76 {
  77         long long maxValLL = (long long) maxVal;
  78         HostType *arrayType = keyOps->typeSubsumes( maxValLL );
  79         assert( arrayType != 0 );
  80         return arrayType->size;
  81 }
  82
  83 string FsmCodeGen::ARRAY_TYPE( unsigned long maxVal )
  84 {
  85         long long maxValLL = (long long) maxVal;
  86         HostType *arrayType = keyOps->typeSubsumes( maxValLL );
  87         assert( arrayType != 0 );
  88
  89         string ret = arrayType->data1;
  90         if ( arrayType->data2 != 0 ) {
  91                 ret += " ";
  92                 ret += arrayType->data2;
  93         }
  94         return ret;
  95 }
  96
  97
  98 /* Write out the fsm name. */
  99 string FsmCodeGen::FSM_NAME()
 100 {
 101         return fsmName;
 102 }
 103
 104 /* Emit the offset of the start state as a decimal integer. */
 105 string FsmCodeGen::START_STATE_ID()
 106 {
 107         ostringstream ret;
 108         ret << redFsm->startState->id;
 109         return ret.str();
 110 };
 111
 112 /* Write out the array of actions. */
 113 std::ostream &FsmCodeGen::ACTIONS_ARRAY()
 114 {
 115         out << "\t0, ";
 116         int totalActions = 1;
 117         for ( ActionTableMap::Iter act = redFsm->actionMap; act.lte(); act++ ) {
 118                 /* Write out the length, which will never be the last character. */
 119                 out << act->key.length() << ", ";
 120                 /* Put in a line break every 8 */
 121                 if ( totalActions++ % 8 == 7 )
 122                         out << "\n\t";
 123
 124                 for ( ActionTable::Iter item = act->key; item.lte(); item++ ) {
 125                         out << item->value->actionId;
 126                         if ( ! (act.last() && item.last()) )
 127                                 out << ", ";
 128
 129                         /* Put in a line break every 8 */
 130                         if ( totalActions++ % 8 == 7 )
 131                                 out << "\n\t";
 132                 }
 133         }
 134         out << "\n";
 135         return out;
 136 }
 137
 138
 139 string FsmCodeGen::ACCESS()
 140 {
 141         ostringstream ret;
 142         if ( accessExpr != 0 )
 143                 INLINE_LIST( ret, accessExpr, 0, false, false );
 144         return ret.str();
 145 }
 146
 147
 148 string FsmCodeGen::P()
 149 {
 150         ostringstream ret;
 151         if ( pExpr == 0 )
 152                 ret << "p";
 153         else {
 154                 ret << "(";
 155                 INLINE_LIST( ret, pExpr, 0, false, false );
 156                 ret << ")";
 157         }
 158         return ret.str();
 159 }
 160
 161 string FsmCodeGen::PE()
 162 {
 163         ostringstream ret;
 164         if ( peExpr == 0 )
 165                 ret << "pe";
 166         else {
 167                 ret << "(";
 168                 INLINE_LIST( ret, peExpr, 0, false, false );
 169                 ret << ")";
 170         }
 171         return ret.str();
 172 }
 173
 174 string FsmCodeGen::EOFV()
 175 {
 176         ostringstream ret;
 177         if ( eofExpr == 0 )
 178                 ret << "eof";
 179         else {
 180                 ret << "(";
 181                 INLINE_LIST( ret, eofExpr, 0, false, false );
 182                 ret << ")";
 183         }
 184         return ret.str();
 185 }
 186
 187 string FsmCodeGen::CS()
 188 {
 189         ostringstream ret;
 190         if ( csExpr == 0 )
 191                 ret << ACCESS() << "cs";
 192         else {
 193                 /* Emit the user supplied method of retrieving the key. */
 194                 ret << "(";
 195                 INLINE_LIST( ret, csExpr, 0, false, false );
 196                 ret << ")";
 197         }
 198         return ret.str();
 199 }
 200
 201 string FsmCodeGen::TOP()
 202 {
 203         ostringstream ret;
 204         if ( topExpr == 0 )
 205                 ret << ACCESS() + "top";
 206         else {
 207                 ret << "(";
 208                 INLINE_LIST( ret, topExpr, 0, false, false );
 209                 ret << ")";
 210         }
 211         return ret.str();
 212 }
 213
 214 string FsmCodeGen::STACK()
 215 {
 216         ostringstream ret;
 217         if ( stackExpr == 0 )
 218                 ret << ACCESS() + "stack";
 219         else {
 220                 ret << "(";
 221                 INLINE_LIST( ret, stackExpr, 0, false, false );
 222                 ret << ")";
 223         }
 224         return ret.str();
 225 }
 226
 227 string FsmCodeGen::ACT()
 228 {
 229         ostringstream ret;
 230         if ( actExpr == 0 )
 231                 ret << ACCESS() + "act";
 232         else {
 233                 ret << "(";
 234                 INLINE_LIST( ret, actExpr, 0, false, false );
 235                 ret << ")";
 236         }
 237         return ret.str();
 238 }
 239
 240 string FsmCodeGen::TOKSTART()
 241 {
 242         ostringstream ret;
 243         if ( tokstartExpr == 0 )
 244                 ret << ACCESS() + "ts";
 245         else {
 246                 ret << "(";
 247                 INLINE_LIST( ret, tokstartExpr, 0, false, false );
 248                 ret << ")";
 249         }
 250         return ret.str();
 251 }
 252
 253 string FsmCodeGen::TOKEND()
 254 {
 255         ostringstream ret;
 256         if ( tokendExpr == 0 )
 257                 ret << ACCESS() + "te";
 258         else {
 259                 ret << "(";
 260                 INLINE_LIST( ret, tokendExpr, 0, false, false );
 261                 ret << ")";
 262         }
 263         return ret.str();
 264 }
 265
 266 string FsmCodeGen::GET_WIDE_KEY()
 267 {
 268         if ( redFsm->anyConditions() )
 269                 return "_widec";
 270         else
 271                 return GET_KEY();
 272 }
 273
 274 string FsmCodeGen::GET_WIDE_KEY( RedStateAp *state )
 275 {
 276         if ( state->stateCondList.length() > 0 )
 277                 return "_widec";
 278         else
 279                 return GET_KEY();
 280 }
 281
 282 string FsmCodeGen::GET_KEY()
 283 {
 284         ostringstream ret;
 285         if ( getKeyExpr != 0 ) {
 286                 /* Emit the user supplied method of retrieving the key. */
 287                 ret << "(";
 288                 INLINE_LIST( ret, getKeyExpr, 0, false, false );
 289                 ret << ")";
 290         }
 291         else {
 292                 /* Expression for retrieving the key, use simple dereference. */
 293                 ret << "(*" << P() << ")";
 294         }
 295         return ret.str();
 296 }
 297
 298 /* Write out level number of tabs. Makes the nested binary search nice
 299  * looking. */
 300 string FsmCodeGen::TABS( int level )
 301 {
 302         string result;
 303         while ( level-- > 0 )
 304                 result += "\t";
 305         return result;
 306 }
 307
 308 /* Write out a key from the fsm code gen. Depends on wether or not the key is
 309  * signed. */
 310 string FsmCodeGen::KEY( Key key )
 311 {
 312         ostringstream ret;
 313         if ( keyOps->isSigned || !hostLang->explicitUnsigned )
 314                 ret << key.getVal();
 315         else
 316                 ret << (unsigned long) key.getVal() << 'u';
 317         return ret.str();
 318 }
 319
 320 void FsmCodeGen::EXEC( ostream &ret, GenInlineItem *item, int targState, int inFinish )
 321 {
 322         /* The parser gives fexec two children. The double brackets are for D
 323          * code. If the inline list is a single word it will get interpreted as a
 324          * C-style cast by the D compiler. */
 325         ret << "{" << P() << " = ((";
 326         INLINE_LIST( ret, item->children, targState, inFinish, false );
 327         ret << "))-1;}";
 328 }
 329
 330 void FsmCodeGen::LM_SWITCH( ostream &ret, GenInlineItem *item,
 331                 int targState, int inFinish, bool csForced )
 332 {
 333         ret <<
 334                 "       switch( " << ACT() << " ) {\n";
 335
 336         bool haveDefault = false;
 337         for ( GenInlineList::Iter lma = *item->children; lma.lte(); lma++ ) {
 338                 /* Write the case label, the action and the case break. */
 339                 if ( lma->lmId < 0 ) {
 340                         ret << "        default:\n";
 341                         haveDefault = true;
 342                 }
 343                 else
 344                         ret << "        case " << lma->lmId << ":\n";
 345
 346                 /* Write the block and close it off. */
 347                 ret << "        {";
 348                 INLINE_LIST( ret, lma->children, targState, inFinish, csForced );
 349                 ret << "}\n";
 350
 351                 ret << "        break;\n";
 352         }
 353
 354         if ( hostLang->lang == HostLang::D && !haveDefault )
 355                 ret << "        default: break;";
 356
 357         ret <<
 358                 "       }\n"
 359                 "\t";
 360 }
 361
 362 void FsmCodeGen::SET_ACT( ostream &ret, GenInlineItem *item )
 363 {
 364         ret << ACT() << " = " << item->lmId << ";";
 365 }
 366
 367 void FsmCodeGen::SET_TOKEND( ostream &ret, GenInlineItem *item )
 368 {
 369         /* The tokend action sets tokend. */
 370         ret << TOKEND() << " = " << P();
 371         if ( item->offset != 0 )
 372                 out << "+" << item->offset;
 373         out << ";";
 374 }
 375
 376 void FsmCodeGen::GET_TOKEND( ostream &ret, GenInlineItem *item )
 377 {
 378         ret << TOKEND();
 379 }
 380
 381 void FsmCodeGen::INIT_TOKSTART( ostream &ret, GenInlineItem *item )
 382 {
 383         ret << TOKSTART() << " = " << NULL_ITEM() << ";";
 384 }
 385
 386 void FsmCodeGen::INIT_ACT( ostream &ret, GenInlineItem *item )
 387 {
 388         ret << ACT() << " = 0;";
 389 }
 390
 391 void FsmCodeGen::SET_TOKSTART( ostream &ret, GenInlineItem *item )
 392 {
 393         ret << TOKSTART() << " = " << P() << ";";
 394 }
 395
 396 void FsmCodeGen::SUB_ACTION( ostream &ret, GenInlineItem *item,
 397                 int targState, bool inFinish, bool csForced )
 398 {
 399         if ( item->children->length() > 0 ) {
 400                 /* Write the block and close it off. */
 401                 ret << "{";
 402                 INLINE_LIST( ret, item->children, targState, inFinish, csForced );
 403                 ret << "}";
 404         }
 405 }
 406
 407
 408 /* Write out an inline tree structure. Walks the list and possibly calls out
 409  * to virtual functions than handle language specific items in the tree. */
 410 void FsmCodeGen::INLINE_LIST( ostream &ret, GenInlineList *inlineList,
 411                 int targState, bool inFinish, bool csForced )
 412 {
 413         for ( GenInlineList::Iter item = *inlineList; item.lte(); item++ ) {
 414                 switch ( item->type ) {
 415                 case GenInlineItem::Text:
 416                         ret << item->data;
 417                         break;
 418                 case GenInlineItem::Goto:
 419                         GOTO( ret, item->targState->id, inFinish );
 420                         break;
 421                 case GenInlineItem::Call:
 422                         CALL( ret, item->targState->id, targState, inFinish );
 423                         break;
 424                 case GenInlineItem::Next:
 425                         NEXT( ret, item->targState->id, inFinish );
 426                         break;
 427                 case GenInlineItem::Ret:
 428                         RET( ret, inFinish );
 429                         break;
 430                 case GenInlineItem::PChar:
 431                         ret << P();
 432                         break;
 433                 case GenInlineItem::Char:
 434                         ret << GET_KEY();
 435                         break;
 436                 case GenInlineItem::Hold:
 437                         ret << P() << "--;";
 438                         break;
 439                 case GenInlineItem::Exec:
 440                         EXEC( ret, item, targState, inFinish );
 441                         break;
 442                 case GenInlineItem::Curs:
 443                         CURS( ret, inFinish );
 444                         break;
 445                 case GenInlineItem::Targs:
 446                         TARGS( ret, inFinish, targState );
 447                         break;
 448                 case GenInlineItem::Entry:
 449                         ret << item->targState->id;
 450                         break;
 451                 case GenInlineItem::GotoExpr:
 452                         GOTO_EXPR( ret, item, inFinish );
 453                         break;
 454                 case GenInlineItem::CallExpr:
 455                         CALL_EXPR( ret, item, targState, inFinish );
 456                         break;
 457                 case GenInlineItem::NextExpr:
 458                         NEXT_EXPR( ret, item, inFinish );
 459                         break;
 460                 case GenInlineItem::LmSwitch:
 461                         LM_SWITCH( ret, item, targState, inFinish, csForced );
 462                         break;
 463                 case GenInlineItem::LmSetActId:
 464                         SET_ACT( ret, item );
 465                         break;
 466                 case GenInlineItem::LmSetTokEnd:
 467                         SET_TOKEND( ret, item );
 468                         break;
 469                 case GenInlineItem::LmGetTokEnd:
 470                         GET_TOKEND( ret, item );
 471                         break;
 472                 case GenInlineItem::LmInitTokStart:
 473                         INIT_TOKSTART( ret, item );
 474                         break;
 475                 case GenInlineItem::LmInitAct:
 476                         INIT_ACT( ret, item );
 477                         break;
 478                 case GenInlineItem::LmSetTokStart:
 479                         SET_TOKSTART( ret, item );
 480                         break;
 481                 case GenInlineItem::SubAction:
 482                         SUB_ACTION( ret, item, targState, inFinish, csForced );
 483                         break;
 484                 case GenInlineItem::Break:
 485                         BREAK( ret, targState, csForced );
 486                         break;
 487                 }
 488         }
 489 }
 490 /* Write out paths in line directives. Escapes any special characters. */
 491 string FsmCodeGen::LDIR_PATH( char *path )
 492 {
 493         ostringstream ret;
 494         for ( char *pc = path; *pc != 0; pc++ ) {
 495                 if ( *pc == '\\' )
 496                         ret << "\\\\";
 497                 else
 498                         ret << *pc;
 499         }
 500         return ret.str();
 501 }
 502
 503 void FsmCodeGen::ACTION( ostream &ret, Action *action, int targState,
 504                 bool inFinish, bool csForced )
 505 {
 506         /* Write the preprocessor line info for going into the source file. */
 507         cdLineDirective( ret, sourceFileName, action->loc.line );
 508
 509         /* Write the block and close it off. */
 510         ret << "\t{";
 511         INLINE_LIST( ret, action->inlineList, targState, inFinish, csForced );
 512         ret << "}\n";
 513 }
 514
 515 void FsmCodeGen::CONDITION( ostream &ret, Action *condition )
 516 {
 517         ret << "\n";
 518         cdLineDirective( ret, sourceFileName, condition->loc.line );
 519         INLINE_LIST( ret, condition->inlineList, 0, false, false );
 520 }
 521
 522 string FsmCodeGen::ERROR_STATE()
 523 {
 524         ostringstream ret;
 525         if ( redFsm->errState != 0 )
 526                 ret << redFsm->errState->id;
 527         else
 528                 ret << "-1";
 529         return ret.str();
 530 }
 531
 532 string FsmCodeGen::FIRST_FINAL_STATE()
 533 {
 534         ostringstream ret;
 535         if ( redFsm->firstFinState != 0 )
 536                 ret << redFsm->firstFinState->id;
 537         else
 538                 ret << redFsm->nextStateId;
 539         return ret.str();
 540 }
 541
 542 void FsmCodeGen::writeInit()
 543 {
 544         out << "        {\n";
 545
 546         if ( writeCS )
 547                 out << "\t" << CS() << " = " << START() << ";\n";
 548
 549         /* If there are any calls, then the stack top needs initialization. */
 550         if ( redFsm->anyActionCalls() || redFsm->anyActionRets() )
 551                 out << "\t" << TOP() << " = 0;\n";
 552
 553         if ( hasLongestMatch ) {
 554                 out <<
 555                         "       " << TOKSTART() << " = " << NULL_ITEM() << ";\n"
 556                         "       " << TOKEND() << " = " << NULL_ITEM() << ";\n"
 557                         "       " << ACT() << " = 0;\n";
 558         }
 559         out << "        }\n";
 560 }
 561
 562 string FsmCodeGen::DATA_PREFIX()
 563 {
 564         if ( dataPrefix )
 565                 return FSM_NAME() + "_";
 566         return "";
 567 }
 568
 569 /* Emit the alphabet data type. */
 570 string FsmCodeGen::ALPH_TYPE()
 571 {
 572         string ret = keyOps->alphType->data1;
 573         if ( keyOps->alphType->data2 != 0 ) {
 574                 ret += " ";
 575                 ret += + keyOps->alphType->data2;
 576         }
 577         return ret;
 578 }
 579
 580 /* Emit the alphabet data type. */
 581 string FsmCodeGen::WIDE_ALPH_TYPE()
 582 {
 583         string ret;
 584         if ( redFsm->maxKey <= keyOps->maxKey )
 585                 ret = ALPH_TYPE();
 586         else {
 587                 long long maxKeyVal = redFsm->maxKey.getLongLong();
 588                 HostType *wideType = keyOps->typeSubsumes( keyOps->isSigned, maxKeyVal );
 589                 assert( wideType != 0 );
 590
 591                 ret = wideType->data1;
 592                 if ( wideType->data2 != 0 ) {
 593                         ret += " ";
 594                         ret += wideType->data2;
 595                 }
 596         }
 597         return ret;
 598 }
 599
 600 void FsmCodeGen::STATE_IDS()
 601 {
 602         if ( redFsm->startState != 0 )
 603                 STATIC_VAR( "int", START() ) << " = " << START_STATE_ID() << ";\n";
 604
 605         if ( writeFirstFinal )
 606                 STATIC_VAR( "int" , FIRST_FINAL() ) << " = " << FIRST_FINAL_STATE() << ";\n";
 607
 608         if ( writeErr )
 609                 STATIC_VAR( "int", ERROR() ) << " = " << ERROR_STATE() << ";\n";
 610
 611         out << "\n";
 612
 613         if ( entryPointNames.length() > 0 ) {
 614                 for ( EntryNameVect::Iter en = entryPointNames; en.lte(); en++ ) {
 615                         STATIC_VAR( "int", DATA_PREFIX() + "en_" + *en ) <<
 616                                         " = " << entryPointIds[en.pos()] << ";\n";
 617                 }
 618                 out << "\n";
 619         }
 620 }
 621
 622
 623 /*
 624  * Language specific, but style independent code generators functions.
 625  */
 626
 627 string CCodeGen::PTR_CONST()
 628 {
 629         return "const ";
 630 }
 631
 632 std::ostream &CCodeGen::OPEN_ARRAY( string type, string name )
 633 {
 634         out << "static const " << type << " " << name << "[] = {\n";
 635         return out;
 636 }
 637
 638 std::ostream &CCodeGen::CLOSE_ARRAY()
 639 {
 640         return out << "};\n";
 641 }
 642
 643 std::ostream &CCodeGen::STATIC_VAR( string type, string name )
 644 {
 645         out << "static const " << type << " " << name;
 646         return out;
 647 }
 648
 649 string CCodeGen::UINT( )
 650 {
 651         return "unsigned int";
 652 }
 653
 654 string CCodeGen::ARR_OFF( string ptr, string offset )
 655 {
 656         return ptr + " + " + offset;
 657 }
 658
 659 string CCodeGen::CAST( string type )
 660 {
 661         return "(" + type + ")";
 662 }
 663
 664 string CCodeGen::NULL_ITEM()
 665 {
 666         return "0";
 667 }
 668
 669 string CCodeGen::POINTER()
 670 {
 671         return " *";
 672 }
 673
 674 std::ostream &CCodeGen::SWITCH_DEFAULT()
 675 {
 676         return out;
 677 }
 678
 679 string CCodeGen::CTRL_FLOW()
 680 {
 681         return "";
 682 }
 683
 684 void CCodeGen::writeExports()
 685 {
 686         if ( exportList.length() > 0 ) {
 687                 for ( ExportList::Iter ex = exportList; ex.lte(); ex++ ) {
 688                         out << "#define " << DATA_PREFIX() << "ex_" << ex->name << " " <<
 689                                         KEY(ex->key) << "\n";
 690                 }
 691                 out << "\n";
 692         }
 693 }
 694
 695 /*
 696  * D Specific
 697  */
 698
 699 string DCodeGen::NULL_ITEM()
 700 {
 701         return "null";
 702 }
 703
 704 string DCodeGen::POINTER()
 705 {
 706         // multiple items seperated by commas can also be pointer types.
 707         return "* ";
 708 }
 709
 710 string DCodeGen::PTR_CONST()
 711 {
 712         return "";
 713 }
 714
 715 std::ostream &DCodeGen::OPEN_ARRAY( string type, string name )
 716 {
 717         out << "static const " << type << "[] " << name << " = [\n";
 718         return out;
 719 }
 720
 721 std::ostream &DCodeGen::CLOSE_ARRAY()
 722 {
 723         return out << "];\n";
 724 }
 725
 726 std::ostream &DCodeGen::STATIC_VAR( string type, string name )
 727 {
 728         out << "static const " << type << " " << name;
 729         return out;
 730 }
 731
 732 string DCodeGen::ARR_OFF( string ptr, string offset )
 733 {
 734         return "&" + ptr + "[" + offset + "]";
 735 }
 736
 737 string DCodeGen::CAST( string type )
 738 {
 739         return "cast(" + type + ")";
 740 }
 741
 742 string DCodeGen::UINT( )
 743 {
 744         return "uint";
 745 }
 746
 747 std::ostream &DCodeGen::SWITCH_DEFAULT()
 748 {
 749         out << "                default: break;\n";
 750         return out;
 751 }
 752
 753 string DCodeGen::CTRL_FLOW()
 754 {
 755         return "if (true) ";
 756 }
 757
 758 void DCodeGen::writeExports()
 759 {
 760         if ( exportList.length() > 0 ) {
 761                 for ( ExportList::Iter ex = exportList; ex.lte(); ex++ ) {
 762                         out << "static const " << ALPH_TYPE() << " " << DATA_PREFIX() <<
 763                                         "ex_" << ex->name << " = " << KEY(ex->key) << ";\n";
 764                 }
 765                 out << "\n";
 766         }
 767 }
 768
 769 /*
 770  * End D-specific code.
 771  */
 772
 773 void FsmCodeGen::finishRagelDef()
 774 {
 775         if ( codeStyle == GenGoto || codeStyle == GenFGoto ||
 776                         codeStyle == GenIpGoto || codeStyle == GenSplit )
 777         {
 778                 /* For directly executable machines there is no required state
 779                  * ordering. Choose a depth-first ordering to increase the
 780                  * potential for fall-throughs. */
 781                 redFsm->depthFirstOrdering();
 782         }
 783         else {
 784                 /* The frontend will do this for us, but it may be a good idea to
 785                  * force it if the intermediate file is edited. */
 786                 redFsm->sortByStateId();
 787         }
 788
 789         /* Choose default transitions and the single transition. */
 790         redFsm->chooseDefaultSpan();
 791
 792         /* Maybe do flat expand, otherwise choose single. */
 793         if ( codeStyle == GenFlat || codeStyle == GenFFlat )
 794                 redFsm->makeFlat();
 795         else
 796                 redFsm->chooseSingle();
 797
 798         /* If any errors have occured in the input file then don't write anything. */
 799         if ( gblErrorCount > 0 )
 800                 return;
 801
 802         if ( codeStyle == GenSplit )
 803                 redFsm->partitionFsm( numSplitPartitions );
 804
 805         if ( codeStyle == GenIpGoto || codeStyle == GenSplit )
 806                 redFsm->setInTrans();
 807
 808         /* Anlayze Machine will find the final action reference counts, among
 809          * other things. We will use these in reporting the usage
 810          * of fsm directives in action code. */
 811         analyzeMachine();
 812
 813         /* Determine if we should use indicies. */
 814         calcIndexSize();
 815 }
 816
 817 ostream &FsmCodeGen::source_warning( const GenInputLoc &loc )
 818 {
 819         cerr << sourceFileName << ":" << loc.line << ":" << loc.col << ": warning: ";
 820         return cerr;
 821 }
 822
 823 ostream &FsmCodeGen::source_error( const GenInputLoc &loc )
 824 {
 825         gblErrorCount += 1;
 826         assert( sourceFileName != 0 );
 827         cerr << sourceFileName << ":" << loc.line << ":" << loc.col << ": ";
 828         return cerr;
 829 }
 830