将一行内容以一定长度分成多行

  data lv_str type string value  'asdfadfadfadfadf'.
  data lv_offset type i.
  data lv_bytes_rd type i.
  data lv_bytes_rm type i.
  data lv_strlen type i.
  field-symbols:   TYPE ANY.


  lv_strlen   = XSTRLEN( lv_str ).
  lv_offset   = 1022.
  lv_bytes_rd = 0.
  lv_bytes_rm = lv_strlen.


  ASSIGN lv_str TO .


  WHILE lv_bytes_rd LT lv_strlen.
    IF  lv_bytes_rm LT lv_offset.
      ls_content-line = +lv_bytes_rd(lv_bytes_rm).
    ELSE.
      ls_content-line = +lv_bytes_rd(lv_offset).
    ENDIF.
    APPEND ls_content TO lt_content.
    lv_bytes_rd = lv_bytes_rd + lv_offset.
    lv_bytes_rm = lv_strlen - lv_bytes_rd.
    CLEAR ls_content.
  ENDWHILE.