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-rw-r--r--rlcodegen/fflatcodegen.cpp364
1 files changed, 364 insertions, 0 deletions
diff --git a/rlcodegen/fflatcodegen.cpp b/rlcodegen/fflatcodegen.cpp
new file mode 100644
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--- /dev/null
+++ b/rlcodegen/fflatcodegen.cpp
@@ -0,0 +1,364 @@
+/*
+ * Copyright 2004-2006 Adrian Thurston <thurston@cs.queensu.ca>
+ * 2004 Eric 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 "rlcodegen.h"
+#include "fflatcodegen.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 ( ActionTableMap::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 ( ActionTable::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 &FFlatCodeGen::FROM_STATE_ACTION_SWITCH()
+{
+ /* Loop the actions. */
+ for ( ActionTableMap::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 ( ActionTable::Iter item = redAct->key; item.lte(); item++ )
+ ACTION( out, item->value, 0, false );
+
+ out << "\tbreak;\n";
+ }
+ }
+
+ genLineDirective( out );
+ return out;
+}
+
+std::ostream &FFlatCodeGen::EOF_ACTION_SWITCH()
+{
+ /* Loop the actions. */
+ for ( ActionTableMap::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 ( ActionTable::Iter item = redAct->key; item.lte(); item++ )
+ ACTION( out, item->value, 0, true );
+
+ 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 ( ActionTableMap::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 ( ActionTable::Iter item = redAct->key; item.lte(); item++ )
+ ACTION( out, item->value, 0, false );
+
+ out << "\tbreak;\n";
+ }
+ }
+
+ genLineDirective( out );
+ return out;
+}
+
+void FFlatCodeGen::writeOutData()
+{
+ if ( anyConditions() ) {
+ OPEN_ARRAY( WIDE_ALPH_TYPE(), CK() );
+ COND_KEYS();
+ CLOSE_ARRAY() <<
+ "\n";
+
+ OPEN_ARRAY( ARRAY_TYPE(maxCondSpan), CSP() );
+ COND_KEY_SPANS();
+ CLOSE_ARRAY() <<
+ "\n";
+
+ OPEN_ARRAY( ARRAY_TYPE(maxCond), C() );
+ CONDS();
+ CLOSE_ARRAY() <<
+ "\n";
+
+ OPEN_ARRAY( ARRAY_TYPE(maxCondIndexOffset), CO() );
+ COND_INDEX_OFFSET();
+ CLOSE_ARRAY() <<
+ "\n";
+ }
+
+ OPEN_ARRAY( WIDE_ALPH_TYPE(), K() );
+ KEYS();
+ CLOSE_ARRAY() <<
+ "\n";
+
+ OPEN_ARRAY( ARRAY_TYPE(maxSpan), SP() );
+ KEY_SPANS();
+ CLOSE_ARRAY() <<
+ "\n";
+
+ OPEN_ARRAY( ARRAY_TYPE(maxFlatIndexOffset), IO() );
+ FLAT_INDEX_OFFSET();
+ CLOSE_ARRAY() <<
+ "\n";
+
+ OPEN_ARRAY( ARRAY_TYPE(maxIndex), I() );
+ INDICIES();
+ CLOSE_ARRAY() <<
+ "\n";
+
+ OPEN_ARRAY( ARRAY_TYPE(maxState), TT() );
+ TRANS_TARGS();
+ CLOSE_ARRAY() <<
+ "\n";
+
+ if ( anyActions() ) {
+ OPEN_ARRAY( ARRAY_TYPE(maxActListId), TA() );
+ TRANS_ACTIONS();
+ CLOSE_ARRAY() <<
+ "\n";
+ }
+
+ if ( anyToStateActions() ) {
+ OPEN_ARRAY( ARRAY_TYPE(maxActionLoc), TSA() );
+ TO_STATE_ACTIONS();
+ CLOSE_ARRAY() <<
+ "\n";
+ }
+
+ if ( anyFromStateActions() ) {
+ OPEN_ARRAY( ARRAY_TYPE(maxActionLoc), FSA() );
+ FROM_STATE_ACTIONS();
+ CLOSE_ARRAY() <<
+ "\n";
+ }
+
+ if ( anyEofActions() ) {
+ OPEN_ARRAY( ARRAY_TYPE(maxActListId), EA() );
+ EOF_ACTIONS();
+ CLOSE_ARRAY() <<
+ "\n";
+ }
+
+ out <<
+ "static const int " << START() << " = " << START_STATE_ID() << ";\n"
+ "\n";
+
+ if ( cgd->writeFirstFinal ) {
+ out <<
+ "static const int " << FIRST_FINAL() << " = " << FIRST_FINAL_STATE() << ";\n"
+ "\n";
+ }
+
+ if ( cgd->writeErr ) {
+ out <<
+ "static const int " << ERROR() << " = " << ERROR_STATE() << ";\n"
+ "\n";
+ }
+}
+
+void FFlatCodeGen::writeOutExec()
+{
+ outLabelUsed = false;
+
+ out <<
+ " {\n"
+ " int _slen";
+
+ if ( anyRegCurStateRef() )
+ out << ", _ps";
+
+ out << ";\n";
+ out << " int _trans";
+
+ if ( anyConditions() )
+ out << ", _cond";
+
+ out << ";\n";
+
+ out <<
+ " " << PTR_CONST() << WIDE_ALPH_TYPE() << POINTER() << "_keys;\n"
+ " " << PTR_CONST() << ARRAY_TYPE(maxIndex) << POINTER() << "_inds;\n";
+
+ if ( anyConditions() ) {
+ out <<
+ " " << PTR_CONST() << ARRAY_TYPE(maxCond) << POINTER() << "_conds;\n"
+ " " << WIDE_ALPH_TYPE() << " _widec;\n";
+ }
+
+ if ( cgd->hasEnd ) {
+ outLabelUsed = true;
+ out <<
+ " if ( " << P() << " == " << PE() << " )\n"
+ " goto _out;\n";
+ }
+
+ out << "_resume:\n";
+
+ if ( redFsm->errState != 0 ) {
+ outLabelUsed = true;
+ out <<
+ " if ( " << CS() << " == " << redFsm->errState->id << " )\n"
+ " goto _out;\n";
+ }
+
+ if ( anyFromStateActions() ) {
+ out <<
+ " switch ( " << FSA() << "[" << CS() << "] ) {\n";
+ FROM_STATE_ACTION_SWITCH();
+ SWITCH_DEFAULT() <<
+ " }\n"
+ "\n";
+ }
+
+ if ( anyConditions() )
+ COND_TRANSLATE();
+
+ LOCATE_TRANS();
+
+ if ( anyRegCurStateRef() )
+ out << " _ps = " << CS() << ";\n";
+
+ out <<
+ " " << CS() << " = " << TT() << "[_trans];\n\n";
+
+ if ( anyRegActions() ) {
+ out <<
+ " if ( " << TA() << "[_trans] == 0 )\n"
+ " goto _again;\n"
+ "\n"
+ " switch ( " << TA() << "[_trans] ) {\n";
+ ACTION_SWITCH();
+ SWITCH_DEFAULT() <<
+ " }\n"
+ "\n";
+ }
+
+ if ( anyRegActions() || anyActionGotos() || anyActionCalls() || anyActionRets() )
+ out << "_again:\n";
+
+ if ( anyToStateActions() ) {
+ out <<
+ " switch ( " << TSA() << "[" << CS() << "] ) {\n";
+ TO_STATE_ACTION_SWITCH();
+ SWITCH_DEFAULT() <<
+ " }\n"
+ "\n";
+ }
+
+ if ( cgd->hasEnd ) {
+ out <<
+ " if ( ++" << P() << " != " << PE() << " )\n"
+ " goto _resume;\n";
+ }
+ else {
+ out <<
+ " " << P() << " += 1;\n"
+ " goto _resume;\n";
+ }
+
+ if ( outLabelUsed )
+ out << " _out: {}\n";
+
+ out << " }\n";
+}
+
+void FFlatCodeGen::writeOutEOF()
+{
+ if ( anyEofActions() ) {
+ out <<
+ " {\n"
+ " switch ( " << EA() << "[" << CS() << "] ) {\n";
+ EOF_ACTION_SWITCH();
+ SWITCH_DEFAULT() <<
+ " }\n"
+ " }\n"
+ "\n";
+ }
+}
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