question: public char [ ] quoteAsString ( String input ) { TextBuffer textBuffer = _textBuffer ; if ( textBuffer == null ) { _textBuffer = textBuffer = new TextBuffer ( null ) ; } char [ ] outputBuffer = textBuffer . emptyAndGetCurrentSegment ( ) ; final int [ ] escCodes = CharTypes . get7BitOutputEscapes ( ) ; final int escCodeCount = escCodes . length ; int inPtr = 0 ; final int inputLen = input . length ( ) ; int outPtr = 0 ; outer_loop : while ( inPtr < inputLen ) { tight_loop : while ( true ) { char c = input . charAt ( inPtr ) ; if ( c < escCodeCount && escCodes [ c ] != 0 ) { break tight_loop ; } if ( outPtr >= outputBuffer . length ) { outputBuffer = textBuffer . finishCurrentSegment ( ) ; outPtr = 0 ; } outputBuffer [ outPtr ++ ] = c ; if ( ++ inPtr >= inputLen ) { break outer_loop ; } } char d = input . charAt ( inPtr ++ ) ; int escCode = escCodes [ d ] ; int length = ( escCode < 0 ) ? _appendNumericEscape ( d , _quoteBuffer ) : _appendNamedEscape ( escCode , _quoteBuffer ) ; ; if ( ( outPtr + length ) > outputBuffer . length ) { int first = outputBuffer . length - outPtr ; if ( first > 0 ) { System . arraycopy ( _quoteBuffer , 0 , outputBuffer , outPtr , first ) ; } outputBuffer = textBuffer . finishCurrentSegment ( ) ; int second = length - first ; System . arraycopy ( _quoteBuffer , first , outputBuffer , 0 , second ) ; outPtr = second ; } else { System . arraycopy ( _quoteBuffer , 0 , outputBuffer , outPtr , length ) ; outPtr += length ; } } textBuffer . setCurrentLength ( outPtr ) ; return textBuffer . contentsAsArray ( ) ; }
target:  Method that will quote text contents using JSON standard quoting, and return results as a character array