text: /*
   *  Copyright 2004-2006 Adrian Thurston <thurston@complang.org>
   *            2004 Erich Ocean <eric.ocean@ampede.com>
   *            2005 Alan West <alan@alanz.com>
   */
  
  /*  This file is part of Ragel.
   *
   *  Ragel is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
   * 
   *  Ragel is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   * 
   *  You should have received a copy of the GNU General Public License
   *  along with Ragel; if not, write to the Free Software
   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
   */
  
  #include "ragel.h"
  #include "cdfflat.h"
  #include "redfsm.h"
  #include "gendata.h"
  
  std::ostream &FFlatCodeGen::TO_STATE_ACTION( RedStateAp *state )
  {
  	int act = 0;
  	if ( state->toStateAction != 0 )
  		act = state->toStateAction->actListId+1;
  	out << act;
  	return out;
  }
  
  std::ostream &FFlatCodeGen::FROM_STATE_ACTION( RedStateAp *state )
  {
  	int act = 0;
  	if ( state->fromStateAction != 0 )
  		act = state->fromStateAction->actListId+1;
  	out << act;
  	return out;
  }
  
  std::ostream &FFlatCodeGen::EOF_ACTION( RedStateAp *state )
  {
  	int act = 0;
  	if ( state->eofAction != 0 )
  		act = state->eofAction->actListId+1;
  	out << act;
  	return out;
  }
  
  /* Write out the function for a transition. */
  std::ostream &FFlatCodeGen::TRANS_ACTION( RedTransAp *trans )
  {
  	int action = 0;
  	if ( trans->action != 0 )
  		action = trans->action->actListId+1;
  	out << action;
  	return out;
  }
  
  /* Write out the function switch. This switch is keyed on the values
   * of the func index. */
  std::ostream &FFlatCodeGen::TO_STATE_ACTION_SWITCH()
  {
  	/* Loop the actions. */
  	for ( GenActionTableMap::Iter redAct = redFsm->actionMap; redAct.lte(); redAct++ ) {
  		if ( redAct->numToStateRefs > 0 ) {
  			/* Write the entry label. */
  			out << "\tcase " << redAct->actListId+1 << ":\n";
  
  			/* Write each action in the list of action items. */
  			for ( GenActionTable::Iter item = redAct->key; item.lte(); item++ )
  				ACTION( out, item->value, 0, false, false );
  
  			out << "\tbreak;\n";
  		}
  	}
  
  	genLineDirective( out );
  	return out;
  }
  
  /* Write out the function switch. This switch is keyed on the values
   * of the func index. */
  std::ostream &FFlatCodeGen::FROM_STATE_ACTION_SWITCH()
  {
  	/* Loop the actions. */
  	for ( GenActionTableMap::Iter redAct = redFsm->actionMap; redAct.lte(); redAct++ ) {
  		if ( redAct->numFromStateRefs > 0 ) {
  			/* Write the entry label. */
  			out << "\tcase " << redAct->actListId+1 << ":\n";
  
  			/* Write each action in the list of action items. */
  			for ( GenActionTable::Iter item = redAct->key; item.lte(); item++ )
  				ACTION( out, item->value, 0, false, false );
  
  			out << "\tbreak;\n";
  		}
  	}
  
  	genLineDirective( out );
  	return out;
  }
  
  std::ostream &FFlatCodeGen::EOF_ACTION_SWITCH()
  {
  	/* Loop the actions. */
  	for ( GenActionTableMap::Iter redAct = redFsm->actionMap; redAct.lte(); redAct++ ) {
  		if ( redAct->numEofRefs > 0 ) {
  			/* Write the entry label. */
  			out << "\tcase " << redAct->actListId+1 << ":\n";
  
  			/* Write each action in the list of action items. */
  			for ( GenActionTable::Iter item = redAct->key; item.lte(); item++ )
  				ACTION( out, item->value, 0, true, false );
  
  			out << "\tbreak;\n";
  		}
  	}
  
  	genLineDirective( out );
  	return out;
  }
  
  /* Write out the function switch. This switch is keyed on the values
   * of the func index. */
  std::ostream &FFlatCodeGen::ACTION_SWITCH()
  {
  	/* Loop the actions. */
  	for ( GenActionTableMap::Iter redAct = redFsm->actionMap; redAct.lte(); redAct++ ) {
  		if ( redAct->numTransRefs > 0 ) {
  			/* Write the entry label. */
  			out << "\tcase " << redAct->actListId+1 << ":\n";
  
  			/* Write each action in the list of action items. */
  			for ( GenActionTable::Iter item = redAct->key; item.lte(); item++ )
  				ACTION( out, item->value, 0, false, false );
  
  			out << "\tbreak;\n";
  		}
  	}
  
  	genLineDirective( out );
  	return out;
  }
  
  void FFlatCodeGen::writeData()
  {
  	if ( redFsm->anyConditions() ) {
  		OPEN_ARRAY( WIDE_ALPH_TYPE(), CK() );
  		COND_KEYS();
  		CLOSE_ARRAY() <<
  		"\n";
  
  		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxCondSpan), CSP() );
  		COND_KEY_SPANS();
  		CLOSE_ARRAY() <<
  		"\n";
  
  		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxCond), C() );
  		CONDS();
  		CLOSE_ARRAY() <<
  		"\n";
  
  		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxCondIndexOffset), CO() );
  		COND_INDEX_OFFSET();
  		CLOSE_ARRAY() <<
  		"\n";
  	}
  
  	OPEN_ARRAY( WIDE_ALPH_TYPE(), K() );
  	KEYS();
  	CLOSE_ARRAY() <<
  	"\n";
  
  	OPEN_ARRAY( ARRAY_TYPE(redFsm->maxSpan), SP() );
  	KEY_SPANS();
  	CLOSE_ARRAY() <<
  	"\n";
  
  	OPEN_ARRAY( ARRAY_TYPE(redFsm->maxFlatIndexOffset), IO() );
  	FLAT_INDEX_OFFSET();
  	CLOSE_ARRAY() <<
  	"\n";
  
  	OPEN_ARRAY( ARRAY_TYPE(redFsm->maxIndex), I() );
  	INDICIES();
  	CLOSE_ARRAY() <<
  	"\n";
  
  	OPEN_ARRAY( ARRAY_TYPE(redFsm->maxState), TT() );
  	TRANS_TARGS();
  	CLOSE_ARRAY() <<
  	"\n";
  
  	if ( redFsm->anyActions() ) {
  		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxActListId), TA() );
  		TRANS_ACTIONS();
  		CLOSE_ARRAY() <<
  		"\n";
  	}
  
  	if ( redFsm->anyToStateActions() ) {
  		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxActionLoc),  TSA() );
  		TO_STATE_ACTIONS();
  		CLOSE_ARRAY() <<
  		"\n";
  	}
  
  	if ( redFsm->anyFromStateActions() ) {
  		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxActionLoc), FSA() );
  		FROM_STATE_ACTIONS();
  		CLOSE_ARRAY() <<
  		"\n";
  	}
  
  	if ( redFsm->anyEofActions() ) {
  		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxActListId), EA() );
  		EOF_ACTIONS();
  		CLOSE_ARRAY() <<
  		"\n";
  	}
  
  	if ( redFsm->anyEofTrans() ) {
  		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxIndexOffset+1), ET() );
  		EOF_TRANS();
  		CLOSE_ARRAY() <<
  		"\n";
  	}
  
  	STATE_IDS();
  }
  
  void FFlatCodeGen::writeExec()
  {
  	testEofUsed = false;
  	outLabelUsed = false;
  
  	out << 
  		"	{\n"
  		"	int _slen";
  
  	if ( redFsm->anyRegCurStateRef() )
  		out << ", _ps";
  	
  	out << ";\n";
  	out << "	int _trans";
  
  	if ( redFsm->anyConditions() )
  		out << ", _cond";
  
  	out << ";\n";
  
  	out <<
  		"	" << PTR_CONST() << WIDE_ALPH_TYPE() << POINTER() << "_keys;\n"
  		"	" << PTR_CONST() << ARRAY_TYPE(redFsm->maxIndex) << POINTER() << "_inds;\n";
  
  	if ( redFsm->anyConditions() ) {
  		out << 
  			"	" << PTR_CONST() << ARRAY_TYPE(redFsm->maxCond) << POINTER() << "_conds;\n"
  			"	" << WIDE_ALPH_TYPE() << " _widec;\n";
  	}
  
  	if ( !noEnd ) {
  		testEofUsed = true;
  		out << 
  			"	if ( " << P() << " == " << PE() << " )\n"
  			"		goto _test_eof;\n";
  	}
  
  	if ( redFsm->errState != 0 ) {
  		outLabelUsed = true;
  		out << 
  			"	if ( " << vCS() << " == " << redFsm->errState->id << " )\n"
  			"		goto _out;\n";
  	}
  
  	out << "_resume:\n";
  
  	if ( redFsm->anyFromStateActions() ) {
  		out <<
  			"	switch ( " << FSA() << "[" << vCS() << "] ) {\n";
  			FROM_STATE_ACTION_SWITCH();
  			SWITCH_DEFAULT() <<
  			"	}\n"
  			"\n";
  	}
  
  	if ( redFsm->anyConditions() )
  		COND_TRANSLATE();
  
  	LOCATE_TRANS();
  
  	if ( redFsm->anyEofTrans() )
  		out << "_eof_trans:\n";
  	
  	if ( redFsm->anyRegCurStateRef() )
  		out << "	_ps = " << vCS() << ";\n";
  
  	out << 
  		"	" << vCS() << " = " << TT() << "[_trans];\n\n";
  
  	if ( redFsm->anyRegActions() ) {
  		out << 
  			"	if ( " << TA() << "[_trans] == 0 )\n"
  			"		goto _again;\n"
  			"\n"
  			"	switch ( " << TA() << "[_trans] ) {\n";
  			ACTION_SWITCH();
  			SWITCH_DEFAULT() <<
  			"	}\n"
  			"\n";
  	}
  
  	if ( redFsm->anyRegActions() || redFsm->anyActionGotos() || 
  			redFsm->anyActionCalls() || redFsm->anyActionRets() )
  		out << "_again:\n";
  
  	if ( redFsm->anyToStateActions() ) {
  		out <<
  			"	switch ( " << TSA() << "[" << vCS() << "] ) {\n";
  			TO_STATE_ACTION_SWITCH();
  			SWITCH_DEFAULT() <<
  			"	}\n"
  			"\n";
  	}
  
  	if ( redFsm->errState != 0 ) {
  		outLabelUsed = true;
  		out << 
  			"	if ( " << vCS() << " == " << redFsm->errState->id << " )\n"
  			"		goto _out;\n";
  	}
  
  	if ( !noEnd ) {
  		out << 
  			"	if ( ++" << P() << " != " << PE() << " )\n"
  			"		goto _resume;\n";
  	}
  	else {
  		out << 
  			"	" << P() << " += 1;\n"
  			"	goto _resume;\n";
  	}
  
  	if ( testEofUsed )
  		out << "	_test_eof: {}\n";
  
  	if ( redFsm->anyEofTrans() || redFsm->anyEofActions() ) {
  		out <<
  			"	if ( " << P() << " == " << vEOF() << " )\n"
  			"	{\n";
  
  		if ( redFsm->anyEofTrans() ) {
  			out <<
  				"	if ( " << ET() << "[" << vCS() << "] > 0 ) {\n"
  				"		_trans = " << ET() << "[" << vCS() << "] - 1;\n"
  				"		goto _eof_trans;\n"
  				"	}\n";
  		}
  
  		if ( redFsm->anyEofActions() ) {
  			out <<
  				"	switch ( " << EA() << "[" << vCS() << "] ) {\n";
  				EOF_ACTION_SWITCH();
  				SWITCH_DEFAULT() <<
  				"	}\n";
  		}
  
  		out <<
  			"	}\n"
  			"\n";
  	}
  
  	if ( outLabelUsed )
  		out << "	_out: {}\n";
  
  	out << "	}\n";
  }
  