question: protected String convertDateFormat ( String pattern ) { boolean inside = false ; boolean mark = false ; boolean modifiedCommand = false ; StringBuilder buf = new StringBuilder ( ) ; for ( int i = 0 ; i < pattern . length ( ) ; i ++ ) { char c = pattern . charAt ( i ) ; if ( c == '%' && ! mark ) { mark = true ; } else { if ( mark ) { if ( modifiedCommand ) { modifiedCommand = false ; mark = false ; } else { inside = translateCommand ( buf , pattern , i , inside ) ; if ( c == 'O' || c == 'E' ) { modifiedCommand = true ; } else { mark = false ; } } } else { if ( ! inside && c != ' ' ) { buf . append ( "'" ) ; inside = true ; } buf . append ( c ) ; } } } if ( buf . length ( ) > 0 ) { char lastChar = buf . charAt ( buf . length ( ) - 1 ) ; if ( lastChar != '\'' && inside ) { buf . append ( '\'' ) ; } } return buf . toString ( ) ; }
target:  Search the provided pattern and get the C standard Date/Time formatting rules and convert them to the Java equivalent.