summaryrefslogtreecommitdiff
path: root/ragel/cdfgoto.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'ragel/cdfgoto.cpp')
-rw-r--r--ragel/cdfgoto.cpp296
1 files changed, 296 insertions, 0 deletions
diff --git a/ragel/cdfgoto.cpp b/ragel/cdfgoto.cpp
new file mode 100644
index 0000000..3b229de
--- /dev/null
+++ b/ragel/cdfgoto.cpp
@@ -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 "cdfgoto.h"
+#include "redfsm.h"
+#include "gendata.h"
+#include "bstmap.h"
+
+std::ostream &FGotoCodeGen::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, 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 &FGotoCodeGen::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 &FGotoCodeGen::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 &FGotoCodeGen::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;
+}
+
+
+std::ostream &FGotoCodeGen::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 FGotoCodeGen::TO_STATE_ACTION( RedStateAp *state )
+{
+ int act = 0;
+ if ( state->toStateAction != 0 )
+ act = state->toStateAction->actListId+1;
+ return act;
+}
+
+unsigned int FGotoCodeGen::FROM_STATE_ACTION( RedStateAp *state )
+{
+ int act = 0;
+ if ( state->fromStateAction != 0 )
+ act = state->fromStateAction->actListId+1;
+ return act;
+}
+
+unsigned int FGotoCodeGen::EOF_ACTION( RedStateAp *state )
+{
+ int act = 0;
+ if ( state->eofAction != 0 )
+ act = state->eofAction->actListId+1;
+ return act;
+}
+
+void FGotoCodeGen::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 FGotoCodeGen::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";
+}
View Lorry Controller Status