/*
* 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";
}