question: public final static int readRawUntil ( final StringBuilder out , final String in , final int start , final char end ) { int pos = start ; while ( pos < in . length ( ) ) { final char ch = in . charAt ( pos ) ; if ( ch == end ) { break ; } out . append ( ch ) ; pos ++ ; } return ( pos == in . length ( ) ) ? - 1 : pos ; }
target:  Reads characters until the end character is encountered, ignoring escape sequences.