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Diffstat (limited to 'ragel/csfgoto.cc')
| -rw-r--r-- | ragel/csfgoto.cc | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/ragel/csfgoto.cc b/ragel/csfgoto.cc new file mode 100644 index 00000000..5a26424c --- /dev/null +++ b/ragel/csfgoto.cc @@ -0,0 +1,296 @@ +/* + * Copyright 2001-2006 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 "csfgoto.h" +#include "redfsm.h" +#include "gendata.h" +#include "bstmap.h" + +std::ostream &CSharpFGotoCodeGen::EXEC_ACTIONS() +{ + /* Loop the actions. */ + for ( GenActionTableMap::Iter redAct = redFsm->actionMap; redAct.lte(); redAct++ ) { + if ( redAct->numTransRefs > 0 ) { + /* We are at the start of a glob, write the case. */ + out << "f" << redAct->actListId << ":\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 ); + + out << "\tgoto _again;\n"; + } + } + return out; +} + +/* Write out the function switch. This switch is keyed on the values + * of the func index. */ +std::ostream &CSharpFGotoCodeGen::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 ); + + 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 &CSharpFGotoCodeGen::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 ); + + out << "\tbreak;\n"; + } + } + + genLineDirective( out ); + return out; +} + +std::ostream &CSharpFGotoCodeGen::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 ); + + out << "\tbreak;\n"; + } + } + + genLineDirective( out ); + return out; +} + + +std::ostream &CSharpFGotoCodeGen::FINISH_CASES() +{ + for ( RedStateList::Iter st = redFsm->stateList; st.lte(); st++ ) { + /* States that are final and have an out action need a case. */ + if ( st->eofAction != 0 ) { + /* Write the case label. */ + out << "\t\tcase " << st->id << ": "; + + /* Jump to the func. */ + out << "goto f" << st->eofAction->actListId << ";\n"; + } + } + + return out; +} + +unsigned int CSharpFGotoCodeGen::TO_STATE_ACTION( RedStateAp *state ) +{ + int act = 0; + if ( state->toStateAction != 0 ) + act = state->toStateAction->actListId+1; + return act; +} + +unsigned int CSharpFGotoCodeGen::FROM_STATE_ACTION( RedStateAp *state ) +{ + int act = 0; + if ( state->fromStateAction != 0 ) + act = state->fromStateAction->actListId+1; + return act; +} + +unsigned int CSharpFGotoCodeGen::EOF_ACTION( RedStateAp *state ) +{ + int act = 0; + if ( state->eofAction != 0 ) + act = state->eofAction->actListId+1; + return act; +} + +void CSharpFGotoCodeGen::writeData() +{ + 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->maxActionLoc), EA() ); + EOF_ACTIONS(); + CLOSE_ARRAY() << + "\n"; + } + + STATE_IDS(); +} + +void CSharpFGotoCodeGen::writeExec() +{ + testEofUsed = false; + outLabelUsed = false; + + out << " {\n"; + + if ( redFsm->anyRegCurStateRef() ) + out << " int _ps = 0;\n"; + + if ( redFsm->anyConditions() ) + out << " " << 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"; + } + + out << + " switch ( " << vCS() << " ) {\n"; + STATE_GOTOS(); + SWITCH_DEFAULT() << + " }\n" + "\n"; + TRANSITIONS() << + "\n"; + + if ( redFsm->anyRegActions() ) + EXEC_ACTIONS() << "\n"; + + 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 << + " switch ( " << vCS() << " ) {\n"; + + for ( RedStateList::Iter st = redFsm->stateList; st.lte(); st++ ) { + if ( st->eofTrans != 0 ) + out << " case " << st->id << ": goto tr" << st->eofTrans->id << ";\n"; + } + + SWITCH_DEFAULT() << + " }\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"; +} |