void GoGotoCodeGen::writeExec()

in ragel/src/ragel/gogoto.cpp [587:734]
124 lines of code
21 McCabe index (conditional complexity)

void GoGotoCodeGen::writeExec()
{
	testEofUsed = false;
	outLabelUsed = false;

	out << "	{" << endl;

	if ( redFsm->anyRegCurStateRef() )
		out << "	var _ps " << INT() << " = 0" << endl;

	if ( redFsm->anyToStateActions() || redFsm->anyRegActions()
			|| redFsm->anyFromStateActions() )
	{
		out <<
			"	var _acts " << INT() << endl <<
			"	var _nacts " << UINT() << endl;
	}

	if ( redFsm->anyConditions() )
		out << "	var _widec " << WIDE_ALPH_TYPE() << endl;

	out << endl;

	if ( !noEnd ) {
		testEofUsed = true;
		out <<
			"	if " << P() << " == " << PE() << " {" << endl <<
			"		goto _test_eof" << endl <<
			"	}" << endl;
	}

	if ( redFsm->errState != 0 ) {
		outLabelUsed = true;
		out <<
			"	if " << vCS() << " == " << redFsm->errState->id << " {" << endl <<
			"		goto _out" << endl <<
			"	}" << endl;
	}

	out << "_resume:" << endl;

	if ( redFsm->anyFromStateActions() ) {
		out <<
			"	_acts = " << CAST(INT(), FSA() + "[" + vCS() + "]") << endl <<
			"	_nacts = " << CAST(UINT(), A() + "[_acts]") << "; _acts++" << endl <<
			"	for ; _nacts > 0; _nacts-- {" << endl <<
			"		_acts++" << endl <<
			"		switch " << A() << "[_acts - 1]" << " {" << endl;
			FROM_STATE_ACTION_SWITCH(2);
			out <<
			"		}" << endl <<
			"	}" << endl <<
			endl;
	}

	out <<
		"	switch " << vCS() << " {" << endl;
		STATE_GOTOS(1);
		out <<
		"	}" << endl <<
		endl;
		TRANSITIONS() <<
		endl;

	if ( redFsm->anyRegActions() )
		EXEC_FUNCS() << endl;

	out << "_again:" << endl;

	if ( redFsm->anyToStateActions() ) {
		out <<
			"	_acts = " << CAST(INT(), TSA() + "[" + vCS() + "]") << endl <<
			"	_nacts = " << CAST(UINT(), A() + "[_acts]") << "; _acts++" << endl <<
			"	for ; _nacts > 0; _nacts-- {" << endl <<
			"		_acts++" << endl <<
			"		switch " << A() << "[_acts - 1]" << " {" << endl;
			TO_STATE_ACTION_SWITCH(2);
			out <<
			"		}" << endl <<
			"	}" << endl <<
			endl;
	}

	if ( redFsm->errState != 0 ) {
		outLabelUsed = true;
		out <<
			"	if " << vCS() << " == " << redFsm->errState->id << " {" << endl <<
			"		goto _out" << endl <<
			"	}" << endl;
	}

	if ( !noEnd ) {
		out <<
			"	if " << P() << "++; " << P() << " != " << PE() << " {" << endl <<
			"		goto _resume" << endl <<
			"	}" << endl;
	}
	else {
		out <<
			"	" << P() << "++" << endl <<
			"	goto _resume" << endl;
	}

	if ( testEofUsed )
		out << "	_test_eof: {}" << endl;

	if ( redFsm->anyEofTrans() || redFsm->anyEofActions() ) {
		out <<
			"	if " << P() << " == " << vEOF() << " {" << endl;

		if ( redFsm->anyEofTrans() ) {
			out <<
				"		switch " << vCS() << " {" << endl;

			for ( RedStateList::Iter st = redFsm->stateList; st.lte(); st++ ) {
				if ( st->eofTrans != 0 )
					out <<
						"		case " << st->id << ":" << endl <<
						"			goto tr" << st->eofTrans->id << endl;
			}

			out <<
				"	}" << endl;
		}

		if ( redFsm->anyEofActions() ) {
			out <<
				"		__acts := " << CAST(INT(), EA() + "[" + vCS() + "]") << endl <<
				"		__nacts := " << CAST(UINT(), A() + "[__acts]") << "; __acts++" << endl <<
				"		for ; __nacts > 0; __nacts-- {" << endl <<
				"			__acts++" << endl <<
				"			switch " << A() << "[__acts - 1]" << " {" << endl;
				EOF_ACTION_SWITCH(3);
				out <<
				"			}" << endl <<
				"		}" << endl;
		}

		out <<
			"	}" << endl <<
			endl;
	}

	if ( outLabelUsed )
		out << "	_out: {}" << endl;

	out << "	}" << endl;
}