content_get(rid, &a);
        blob_delta_apply(&a, &delta, &b);
        int eType2 = 0;
        if( !fIncludeBinary ){
          eType = looks_like_text(pBase);
          eType2 = looks_like_text(&b);
        }
        if( DIFFERENT_ENCODING(eType, eType2) ){
          diff_print_filenames(zOrig, zNew, diffFlags);
          printf(DIFF_CANNOT_COMPUTE_ENCODING);
        }else{
          diff_file_mem(pBase, &b, eType, zNew, zDiffCmd,
                        zBinGlob, fIncludeBinary, diffFlags);
        }
        blob_reset(&a);