void FlatCodeGen::writeExec()

in ragel/src/ragel/cdflat.cpp [677:851]
146 lines of code
27 McCabe index (conditional complexity)

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

	out << 
		"	{\n"
		"	int _slen";

	if ( redFsm->anyRegCurStateRef() )
		out << ", _ps";

	out << 
		";\n"
		"	int _trans";

	if ( redFsm->anyConditions() )
		out << ", _cond";
	out << ";\n";

	if ( redFsm->anyToStateActions() || 
			redFsm->anyRegActions() || redFsm->anyFromStateActions() )
	{
		out << 
			"	" << PTR_CONST() << ARRAY_TYPE(redFsm->maxActArrItem) << PTR_CONST_END() << POINTER() << "_acts;\n"
			"	" << UINT() << " _nacts;\n"; 
	}

	out <<
		"	" << PTR_CONST() << WIDE_ALPH_TYPE() << PTR_CONST_END() << POINTER() << "_keys;\n"
		"	" << PTR_CONST() << ARRAY_TYPE(redFsm->maxIndex) << PTR_CONST_END() << POINTER() << "_inds;\n";

	if ( redFsm->anyConditions() ) {
		out << 
			"	" << PTR_CONST() << ARRAY_TYPE(redFsm->maxCond) << PTR_CONST_END() << POINTER() << "_conds;\n"
			"	" << WIDE_ALPH_TYPE() << " _widec;\n";
	}

	out << "\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 <<
			"	_acts = " << ARR_OFF( A(), FSA() + "[" + vCS() + "]" ) << ";\n"
			"	_nacts = " << CAST(UINT()) << " *_acts++;\n"
			"	while ( _nacts-- > 0 ) {\n"
			"		switch ( *_acts++ ) {\n";
			FROM_STATE_ACTION_SWITCH();
			SWITCH_DEFAULT() <<
			"		}\n"
			"	}\n"
			"\n";
	}

	if ( redFsm->anyConditions() )
		COND_TRANSLATE();

	LOCATE_TRANS();

	if ( redFsm->anyEofTrans() )
		out << "_eof_trans:\n";

	if ( redFsm->anyRegCurStateRef() )
		out << "	_ps = " << vCS() << ";\n";

	out <<
		"	" << vCS() << " = " << TT() << "[_trans];\n"
		"\n";

	if ( redFsm->anyRegActions() ) {
		out <<
			"	if ( " << TA() << "[_trans] == 0 )\n"
			"		goto _again;\n"
			"\n"
			"	_acts = " << ARR_OFF( A(), TA() + "[_trans]" ) << ";\n"
			"	_nacts = " << CAST(UINT()) << " *_acts++;\n"
			"	while ( _nacts-- > 0 ) {\n"
			"		switch ( *(_acts++) )\n		{\n";
			ACTION_SWITCH();
			SWITCH_DEFAULT() <<
			"		}\n"
			"	}\n"
			"\n";
	}

	if ( redFsm->anyRegActions() || redFsm->anyActionGotos() || 
			redFsm->anyActionCalls() || redFsm->anyActionRets() )
		out << "_again:\n";

	if ( redFsm->anyToStateActions() ) {
		out <<
			"	_acts = " << ARR_OFF( A(),  TSA() + "[" + vCS() + "]" ) << ";\n"
			"	_nacts = " << CAST(UINT()) << " *_acts++;\n"
			"	while ( _nacts-- > 0 ) {\n"
			"		switch ( *_acts++ ) {\n";
			TO_STATE_ACTION_SWITCH();
			SWITCH_DEFAULT() <<
			"		}\n"
			"	}\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 <<
				"	if ( " << ET() << "[" << vCS() << "] > 0 ) {\n"
				"		_trans = " << ET() << "[" << vCS() << "] - 1;\n"
				"		goto _eof_trans;\n"
				"	}\n";
		}

		if ( redFsm->anyEofActions() ) {
			out <<
				"	" << PTR_CONST() << ARRAY_TYPE(redFsm->maxActArrItem) << PTR_CONST_END() << 
						POINTER() << "__acts = " << 
						ARR_OFF( A(), EA() + "[" + vCS() + "]" ) << ";\n"
				"	" << UINT() << " __nacts = " << CAST(UINT()) << " *__acts++;\n"
				"	while ( __nacts-- > 0 ) {\n"
				"		switch ( *__acts++ ) {\n";
				EOF_ACTION_SWITCH();
				SWITCH_DEFAULT() <<
				"		}\n"
				"	}\n";
		}

		out <<
			"	}\n"
			"\n";
	}

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

	out << "	}\n";
}