void RubyFFlatCodeGen::writeExec()

in ragel/src/ragel/rubyfflat.cpp [322:479]
128 lines of code
20 McCabe index (conditional complexity)

void RubyFFlatCodeGen::writeExec()
{
	out << 
		"begin\n"
		"	testEof = false\n"
		"	_slen, _trans, _keys, _inds";
	if ( redFsm->anyRegCurStateRef() )
		out << ", _ps";
	if ( redFsm->anyConditions() )
		out << ", _cond, _conds, _widec";
	if ( redFsm->anyToStateActions() || redFsm->anyRegActions() 
			|| redFsm->anyFromStateActions() )
		out << ", _acts, _nacts";
	
	out << " = nil\n";

	out << 
		"	_goto_level = 0\n"
		"	_resume = 10\n"
		"	_eof_trans = 15\n"
		"	_again = 20\n"
		"	_test_eof = 30\n"
		"	_out = 40\n";

	out << 
		"	while true\n"
		"	if _goto_level <= 0\n";
	
	if ( !noEnd ) {
		out << 
			"	if " << P() << " == " << PE() << "\n"
			"		_goto_level = _test_eof\n"
			"		next\n"
			"	end\n";
	}

	if ( redFsm->errState != 0 ) {
		out << 
			"	if " << vCS() << " == " << redFsm->errState->id << "\n"
			"		_goto_level = _out\n"
			"		next\n"
			"	end\n";
	}

	/* The resume label. */
	out << 
		"	end\n"
		"	if _goto_level <= _resume\n";
	
	if ( redFsm->anyFromStateActions() ) {
		out <<
			"	case " << FSA() << "[" << vCS() << "] \n";
			FROM_STATE_ACTION_SWITCH() <<
			"	end\n";
	}

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

	if ( redFsm->anyEofTrans() ) {
		out << 
			"	end\n"
			"	if _goto_level <= _eof_trans\n";
	}

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

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

	if ( redFsm->anyRegActions() ) {
		/* break _again */
		out << 
			"	if " << TA() << "[_trans] != 0\n"
			"	case " << TA() << "[_trans]" << "\n";
			ACTION_SWITCH() <<
			"	end\n"
			"	end\n";
	}

	/* The again label. */
	out <<
		"	end\n"
		"	if _goto_level <= _again\n";

	if ( redFsm->anyToStateActions() ) {
		out <<
			"	case " << TSA() << "[" << vCS() << "] \n";
			TO_STATE_ACTION_SWITCH() <<
			"	end\n"
			"\n";
	}

	if ( redFsm->errState != 0 ) {
		out << 
			"	if " << vCS() << " == " << redFsm->errState->id << "\n"
			"		_goto_level = _out\n"
			"		next\n"
			"	end\n";
	}

	out << "	" << P() << " += 1\n";

	if ( !noEnd ) {
		out << 
			"	if " << P() << " != " << PE() << "\n"
			"		_goto_level = _resume\n"
			"		next\n"
			"	end\n";
	}
	else {
		out <<
			"	_goto_level = _resume\n"
			"	next\n";
	}
	
	/* The test eof label. */
	out <<
		"	end\n"
		"	if _goto_level <= _test_eof\n";

	if ( redFsm->anyEofTrans() || redFsm->anyEofActions() ) {
		out <<
			"	if " << P() << " == " << vEOF() << "\n";
	
		if ( redFsm->anyEofTrans() ) {
			out <<
				"	if " << ET() << "[" << vCS() << "] > 0\n"
				"		_trans = " << ET() << "[" << vCS() << "] - 1;\n"
				"		_goto_level = _eof_trans\n"
				"		next;\n"
				"	end\n";
		}

		if ( redFsm->anyEofActions() ) {
			out <<
				"	  case " << EA() << "[" << vCS() << "]\n";
				EOF_ACTION_SWITCH() <<
				"	  end\n";
		}

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

	out << 
		"	end\n"
		"	if _goto_level <= _out\n"
		"		break\n"
		"	end\n"
		"end\n";

	/* Wrapping the execute block. */
	out << "	end\n";
}