decrements the internal index . concode_field_sep int head concode_elem_sep int tail concode_elem_sep byte[] buffer concode_field_sep boolean add concode_elem_sep Iterator iterator concode_elem_sep int size concode_elem_sep byte get concode_elem_sep boolean isEmpty concode_elem_sep int increment concode_elem_sep byte remove
int function ( int arg0 ) { arg0 -- ; if ( arg0 < 0 ) { arg0 = buffer . length - 1 ; } return arg0 ; }