ragel-6.9ragel-6.9

1 files changed, 462 insertions, 0 deletions

diff --git a/ragel/mlftable.cpp b/ragel/mlftable.cpp
new file mode 100644
index 0000000..15a9885
--- /dev/null
+++ b/ragel/mlftable.cpp
@@ -0,0 +1,462 @@
+/*
+ *  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 "mlftable.h"
+#include "redfsm.h"
+#include "gendata.h"
+
+/* Determine if we should use indicies or not. */
+void OCamlFTabCodeGen::calcIndexSize()
+{
+	int sizeWithInds = 0, sizeWithoutInds = 0;
+
+	/* Calculate cost of using with indicies. */
+	for ( RedStateList::Iter st = redFsm->stateList; st.lte(); st++ ) {
+		int totalIndex = st->outSingle.length() + st->outRange.length() + 
+				(st->defTrans == 0 ? 0 : 1);
+		sizeWithInds += arrayTypeSize(redFsm->maxIndex) * totalIndex;
+	}
+	sizeWithInds += arrayTypeSize(redFsm->maxState) * redFsm->transSet.length();
+	if ( redFsm->anyActions() )
+		sizeWithInds += arrayTypeSize(redFsm->maxActListId) * redFsm->transSet.length();
+
+	/* Calculate the cost of not using indicies. */
+	for ( RedStateList::Iter st = redFsm->stateList; st.lte(); st++ ) {
+		int totalIndex = st->outSingle.length() + st->outRange.length() + 
+				(st->defTrans == 0 ? 0 : 1);
+		sizeWithoutInds += arrayTypeSize(redFsm->maxState) * totalIndex;
+		if ( redFsm->anyActions() )
+			sizeWithoutInds += arrayTypeSize(redFsm->maxActListId) * totalIndex;
+	}
+
+	/* If using indicies reduces the size, use them. */
+	useIndicies = sizeWithInds < sizeWithoutInds;
+}
+
+std::ostream &OCamlFTabCodeGen::TO_STATE_ACTION( RedStateAp *state )
+{
+	int act = 0;
+	if ( state->toStateAction != 0 )
+		act = state->toStateAction->actListId+1;
+	out << act;
+	return out;
+}
+
+std::ostream &OCamlFTabCodeGen::FROM_STATE_ACTION( RedStateAp *state )
+{
+	int act = 0;
+	if ( state->fromStateAction != 0 )
+		act = state->fromStateAction->actListId+1;
+	out << act;
+	return out;
+}
+
+std::ostream &OCamlFTabCodeGen::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 &OCamlFTabCodeGen::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 &OCamlFTabCodeGen::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 << "\t| " << 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 << "\t()\n";
+		}
+	}
+
+	genLineDirective( out );
+	return out;
+}
+
+/* Write out the function switch. This switch is keyed on the values
+ * of the func index. */
+std::ostream &OCamlFTabCodeGen::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 << "\t| " << 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 << "\t()\n";
+		}
+	}
+
+	genLineDirective( out );
+	return out;
+}
+
+std::ostream &OCamlFTabCodeGen::EOF_ACTION_SWITCH()
+{
+	/* Loop the actions. */
+	for ( GenActionTableMap::Iter redAct = redFsm->actionMap; redAct.lte(); redAct++ ) {
+		if ( redAct->numEofRefs > 0 ) {
+			/* Write the entry label. */
+			out << "\t| " << 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 << "\t()\n";
+		}
+	}
+
+	genLineDirective( out );
+	return out;
+}
+
+/* Write out the function switch. This switch is keyed on the values
+ * of the func index. */
+std::ostream &OCamlFTabCodeGen::ACTION_SWITCH()
+{
+	/* Loop the actions. */
+	for ( GenActionTableMap::Iter redAct = redFsm->actionMap; redAct.lte(); redAct++ ) {
+		if ( redAct->numTransRefs > 0 ) {
+			/* Write the entry label. */
+			out << "\t| " << 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 << "\t()\n";
+		}
+	}
+
+	genLineDirective( out );
+	return out;
+}
+
+void OCamlFTabCodeGen::writeData()
+{
+	if ( redFsm->anyConditions() ) {
+		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxCondOffset), CO() );
+		COND_OFFSETS();
+		CLOSE_ARRAY() <<
+		"\n";
+
+		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxCondLen), CL() );
+		COND_LENS();
+		CLOSE_ARRAY() <<
+		"\n";
+
+		OPEN_ARRAY( WIDE_ALPH_TYPE(), CK() );
+		COND_KEYS();
+		CLOSE_ARRAY() <<
+		"\n";
+
+		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxCondSpaceId), C() );
+		COND_SPACES();
+		CLOSE_ARRAY() <<
+		"\n";
+	}
+
+	OPEN_ARRAY( ARRAY_TYPE(redFsm->maxKeyOffset), KO() );
+	KEY_OFFSETS();
+	CLOSE_ARRAY() <<
+	"\n";
+
+	OPEN_ARRAY( WIDE_ALPH_TYPE(), K() );
+	KEYS();
+	CLOSE_ARRAY() <<
+	"\n";
+
+	OPEN_ARRAY( ARRAY_TYPE(redFsm->maxSingleLen), SL() );
+	SINGLE_LENS();
+	CLOSE_ARRAY() <<
+	"\n";
+
+	OPEN_ARRAY( ARRAY_TYPE(redFsm->maxRangeLen), RL() );
+	RANGE_LENS();
+	CLOSE_ARRAY() <<
+	"\n";
+
+	OPEN_ARRAY( ARRAY_TYPE(redFsm->maxIndexOffset), IO() );
+	INDEX_OFFSETS();
+	CLOSE_ARRAY() <<
+	"\n";
+
+	if ( useIndicies ) {
+		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxIndex), I() );
+		INDICIES();
+		CLOSE_ARRAY() <<
+		"\n";
+
+		OPEN_ARRAY( ARRAY_TYPE(redFsm->maxState), TT() );
+		TRANS_TARGS_WI();
+		CLOSE_ARRAY() <<
+		"\n";
+
+		if ( redFsm->anyActions() ) {
+			OPEN_ARRAY( ARRAY_TYPE(redFsm->maxActListId), TA() );
+			TRANS_ACTIONS_WI();
+			CLOSE_ARRAY() <<
+			"\n";
+		}
+	}
+	else {
+		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();
+
+  out << "type " << TYPE_STATE() << " = { mutable keys : int; mutable trans : int; }"
+    << TOP_SEP();
+
+  out << "exception Goto_match" << TOP_SEP();
+  out << "exception Goto_again" << TOP_SEP();
+  out << "exception Goto_eof_trans" << TOP_SEP();
+}
+
+void OCamlFTabCodeGen::writeExec()
+{
+	testEofUsed = false;
+	outLabelUsed = false;
+	initVarTypes();
+
+	out << 
+		"	begin\n";
+
+//	if ( redFsm->anyRegCurStateRef() )
+//		out << klenType ", _ps";
+
+  out <<
+    "	let state = { keys = 0; trans = 0; } in\n"
+    "	let rec do_start () =\n";
+
+//	if ( redFsm->anyConditions() )
+//		out << "	" << WIDE_ALPH_TYPE() << " _widec;\n";
+
+	if ( !noEnd ) {
+		testEofUsed = true;
+		out << 
+			"	if " << P() << " = " << PE() << " then\n"
+			"		do_test_eof ()\n"
+      "\telse\n";
+	}
+
+	if ( redFsm->errState != 0 ) {
+		outLabelUsed = true;
+		out << 
+			"	if " << vCS() << " = " << redFsm->errState->id << " then\n"
+			"		do_out ()\n"
+      "\telse\n";
+	}
+  out << "\tdo_resume ()\n";
+
+	out << "and do_resume () =\n";
+
+	if ( redFsm->anyFromStateActions() ) {
+		out <<
+			"	begin match " << AT( FSA(), vCS() ) << " with\n";
+			FROM_STATE_ACTION_SWITCH();
+			SWITCH_DEFAULT() <<
+			"	end;\n"
+			"\n";
+	}
+
+	if ( redFsm->anyConditions() )
+		COND_TRANSLATE();
+
+  out << "\tbegin try\n";
+	LOCATE_TRANS();
+  out << "\twith Goto_match -> () end;\n";
+
+  out << 
+    "\tdo_match ()\n";
+
+	out << "and do_match () =\n";
+
+	if ( useIndicies )
+		out << "	state.trans <- " << CAST(transType) << AT( I(), "state.trans" ) << ";\n";
+
+  out << "\tdo_eof_trans ()\n";
+	
+//	if ( redFsm->anyEofTrans() )
+  out << "and do_eof_trans () =\n";
+
+	if ( redFsm->anyRegCurStateRef() )
+		out << "	let ps = " << vCS() << " in\n";
+
+	out <<
+		"	" << vCS() << " <- " << AT( TT() ,"state.trans" ) << ";\n"
+		"\n";
+
+	if ( redFsm->anyRegActions() ) {
+		out << 
+			"	begin try if " << AT( TA() , "state.trans" ) << " = 0 then\n"
+			"		raise Goto_again;\n"
+			"\n"
+			"	match " << AT( TA(), "state.trans" ) << " with\n";
+			ACTION_SWITCH();
+			SWITCH_DEFAULT() <<
+			"	with Goto_again -> () end;\n"
+			"\n";
+	}
+  out << "\tdo_again ()\n";
+
+//	if ( redFsm->anyRegActions() || redFsm->anyActionGotos() || 
+//			redFsm->anyActionCalls() || redFsm->anyActionRets() )
+  out << "\tand do_again () =\n";
+
+	if ( redFsm->anyToStateActions() ) {
+		out <<
+			"	begin match " << AT( TSA(), vCS() ) << " with\n";
+			TO_STATE_ACTION_SWITCH();
+			SWITCH_DEFAULT() <<
+			"	end;\n"
+			"\n";
+	}
+
+	if ( redFsm->errState != 0 ) {
+		outLabelUsed = true;
+		out << 
+			"	match " << vCS() << " with\n"
+      "\t| " << redFsm->errState->id << " -> do_out ()\n"
+      "\t| _ ->\n";
+	}
+
+  out << "\t" << P() << " <- " << P() << " + 1;\n";
+
+	if ( !noEnd ) {
+		out << 
+			"	if " << P() << " <> " << PE() << " then\n"
+			"		do_resume ()\n"
+      "\telse do_test_eof ()\n";
+	}
+	else {
+		out << 
+			"	do_resume ()\n";
+	}
+
+//	if ( testEofUsed )
+	out << "and do_test_eof () =\n";
+	
+	if ( redFsm->anyEofTrans() || redFsm->anyEofActions() ) {
+		out << 
+			"	if " << P() << " = " << vEOF() << " then\n"
+			"	begin try\n";
+
+		if ( redFsm->anyEofTrans() ) {
+			out <<
+				"	if " << AT( ET(), vCS() ) << " > 0 then\n"
+				"	begin\n"
+        "   state.trans <- " << CAST(transType) << "(" << AT( ET(), vCS() ) << " - 1);\n"
+				"		raise Goto_eof_trans;\n"
+				"	end;\n";
+		}
+
+		if ( redFsm->anyEofActions() ) {
+			out <<
+				"	begin match " << AT( EA(), vCS() ) << " with\n";
+				EOF_ACTION_SWITCH();
+				SWITCH_DEFAULT() <<
+				"	end\n";
+		}
+
+		out << 
+			"	with Goto_again -> do_again ()\n"
+			"	| Goto_eof_trans -> do_eof_trans () end\n"
+			"\n";
+	}
+  else
+  {
+    out << "\t()\n";
+  }
+
+	if ( outLabelUsed )
+		out << "	and do_out () = ()\n";
+
+  out << "\tin do_start ()\n";
+	out << "	end;\n";
+}
+