Discussão:Código Natural/Representação interna
< Discussão:Código Natural(Redirecionado de Discussão:Código natural/Representação interna)
Gerador didático
Usar select * from natcod.generate_vbit_series_didactic(4) para destacar a necessidade de uso do lval:
s | len | rval | lval | lval_rotated+len | rval_bin | lval_bin | len_bin ------+-----+------+------+------------------+----------+----------+--------- 0 | 1 | 0 | 0 | 1 | 0000 | 0000 | 0001 00 | 2 | 0 | 0 | 2 | 0000 | 0000 | 0010 000 | 3 | 0 | 0 | 3 | 0000 | 0000 | 0011 0000 | 4 | 0 | 0 | 4 | 0000 | 0000 | 0100 0001 | 4 | 1 | 1 | 12 | 0001 | 0001 | 0100 001 | 3 | 1 | 2 | 19 | 0001 | 0010 | 0011 0010 | 4 | 2 | 2 | 20 | 0010 | 0010 | 0100 0011 | 4 | 3 | 3 | 28 | 0011 | 0011 | 0100 01 | 2 | 1 | 4 | 34 | 0001 | 0100 | 0010 010 | 3 | 2 | 4 | 35 | 0010 | 0100 | 0011 0100 | 4 | 4 | 4 | 36 | 0100 | 0100 | 0100 0101 | 4 | 5 | 5 | 44 | 0101 | 0101 | 0100 011 | 3 | 3 | 6 | 51 | 0011 | 0110 | 0011 0110 | 4 | 6 | 6 | 52 | 0110 | 0110 | 0100 0111 | 4 | 7 | 7 | 60 | 0111 | 0111 | 0100 1 | 1 | 1 | 8 | 65 | 0001 | 1000 | 0001 10 | 2 | 2 | 8 | 66 | 0010 | 1000 | 0010 100 | 3 | 4 | 8 | 67 | 0100 | 1000 | 0011 1000 | 4 | 8 | 8 | 68 | 1000 | 1000 | 0100 1001 | 4 | 9 | 9 | 76 | 1001 | 1001 | 0100 101 | 3 | 5 | 10 | 83 | 0101 | 1010 | 0011 1010 | 4 | 10 | 10 | 84 | 1010 | 1010 | 0100 1011 | 4 | 11 | 11 | 92 | 1011 | 1011 | 0100 11 | 2 | 3 | 12 | 98 | 0011 | 1100 | 0010 110 | 3 | 6 | 12 | 99 | 0110 | 1100 | 0011 1100 | 4 | 12 | 12 | 100 | 1100 | 1100 | 0100 1101 | 4 | 13 | 13 | 108 | 1101 | 1101 | 0100 111 | 3 | 7 | 14 | 115 | 0111 | 1110 | 0011 1110 | 4 | 14 | 14 | 116 | 1110 | 1110 | 0100 1111 | 4 | 15 | 15 | 124 | 1111 | 1111 | 0100
Geração dos exemplos
select s, len, rval, lval, rval_bin, lval_bin FROM natcod.generate_vbit_series_didactic(5) limit 11;
select s, len, rval, lval, (lval<<2)+len as "(lval<<2)+len" FROM natcod.generate_vbit_series_didactic(3);
CREATE VIEW wiki_print1_hbig AS
SELECT len,
bitstring,
hbig as hbig_dec,
'0 '||((hbig-len)>>4)::bit(11)::text ||' ' ||len::bit(4)::text internal_16bits,
hbig>>4 as value_dec,
len as len_dec
FROM (
SELECT row_number() over() AS count, bitstring,
natcod.vBit_to_hSml( bitstring ) as hbig,
length(bitstring) as len,
natcod.vbit_to_hiddenBig( bitstring ) as hidd,
natcod.vbit_to_baseh(bitstring,4,true) as b4h,
natcod.vbit_to_baseh(bitstring,16,true) as b16h
FROM natcod.generate_vbit_series(11) t(bitstring)
) t2
;
-- drop VIEW wiki_print2_hcount;
CREATE VIEW wiki_print2_hcount AS
SELECT row_number() over() AS count, bitstring,
natcod.vbit_to_baseh(bitstring,16,true) as b16h,
natcod.vBit_to_hCount16c48(bitstring,1::bigint) as hcount1,
natcod.vBit_to_hCount16c48(bitstring,281474976710655::bigint) as hcount_max
FROM natcod.generate_vbit_series(11) t(bitstring) -- or 3
;
CREATE VIEW wiki_print3_hcount_explode AS
SELECT bitstring, len,
hcount as hcount_dec,
'0 '||substring(hcount::bit(64),2,11)::text ||' '||len::bit(4)::text||' '||((hcount<<16)>>16)::bit(48)::text hcount_bin
FROM (
SELECT *,length(bitstring) as len, natcod.vBit_to_hCount16c48(bitstring,123::bigint) as hcount
FROM wiki_print2_hcount
) t;
CREATE VIEW wiki_print4_hcount_human AS
select *, natcod.hCount16c48_asBeauty(hc,4,true) as hc_human
from (
select h_path, c, natcod.vBit_to_hCount16c48(h_path,c::bigint) as hc
from ( SELECT bitstring as h_path,
unnest( array[ random_between(1,3509999999)::bigint, 123::bigint, random_between(1,550999999)::bigint ] ) as c
FROM wiki_print2_hcount
) tt
) tt2 order by 3
;
wiki_print1_hbig:
len | bitstring | hbig_dec | internal_16bits | value_dec | len_dec
----+-------------+----------+--------------------+-----------+---------
1 | 0 | 1 | 0 00000000000 0001 | 0 | 1
2 | 00 | 2 | 0 00000000000 0010 | 0 | 2
3 | 000 | 3 | 0 00000000000 0011 | 0 | 3
4 | 0000 | 4 | 0 00000000000 0100 | 0 | 4
5 | 00000 | 5 | 0 00000000000 0101 | 0 | 5
6 | 000000 | 6 | 0 00000000000 0110 | 0 | 6
7 | 0000000 | 7 | 0 00000000000 0111 | 0 | 7
8 | 00000000 | 8 | 0 00000000000 1000 | 0 | 8
9 | 000000000 | 9 | 0 00000000000 1001 | 0 | 9
10 | 0000000000 | 10 | 0 00000000000 1010 | 0 | 10
11 | 00000000000 | 11 | 0 00000000000 1011 | 0 | 11
11 | 00000000001 | 27 | 0 00000000001 1011 | 1 | 11
10 | 0000000001 | 42 | 0 00000000010 1010 | 2 | 10
...
wiki_print2_hcount:
count | bitstring | b16h | hcount1 | hcount_max
------+-------------+------+---------------------+---------------------
1 | 0 | G | 281474976710657 | 562949953421311
2 | 00 | H | 562949953421313 | 844424930131967
3 | 000 | J | 844424930131969 | 1125899906842623
4 | 0000 | 0 | 1125899906842625 | 1407374883553279
5 | 00000 | 0G | 1407374883553281 | 1688849860263935
6 | 000000 | 0H | 1688849860263937 | 1970324836974591
7 | 0000000 | 0J | 1970324836974593 | 2251799813685247
8 | 00000000 | 00 | 2251799813685249 | 2533274790395903
9 | 000000000 | 00G | 2533274790395905 | 2814749767106559
10 | 0000000000 | 00H | 2814749767106561 | 3096224743817215
11 | 00000000000 | 00J | 3096224743817217 | 3377699720527871
12 | 00000000001 | 00K | 7599824371187713 | 7881299347898367
13 | 0000000001 | 00M | 11821949021847553 | 12103423998558207
...
wiki_print3_hcount_explode:
bitstring | len | hcount_dec | hcount_bin
----------+-----+---------------------+---------------------------------------------------------------------
0 | 1 | 281474976710779 | 0 00000000000 0001 000000000000000000000000000000000000000001111011
00 | 2 | 562949953421435 | 0 00000000000 0010 000000000000000000000000000000000000000001111011
000 | 3 | 844424930132091 | 0 00000000000 0011 000000000000000000000000000000000000000001111011
001 | 3 | 1153765929536979067 | 0 00100000000 0011 000000000000000000000000000000000000000001111011
...
Exemplo de comprimento 11
Distribuição dos comprimentos:
select len, count(*) n from wiki_print1 group by 1 order by 2 desc, 1; len | n -----+------ 11 | 2048 10 | 1024 9 | 512 8 | 256 7 | 128 6 | 64 5 | 32 4 | 16 3 | 8 2 | 4 1 | 2 (11 rows)
Distribuição dos valores sem diferenciador cache-length:
select value_dec, count(*) n from wiki_print1 group by 1 order by 2 desc, 1;
value_dec | n
-----------+----
0 | 11
1024 | 11
512 | 10
1536 | 10
256 | 9
768 | 9
1280 | 9
1792 | 9
128 | 8
384 | 8
640 | 8
896 | 8
1152 | 8
1408 | 8
1664 | 8
1920 | 8
64 | 7
192 | 7
320 | 7
448 | 7
576 | 7
... | ...
2012 | 3
2020 | 3
2028 | 3
2036 | 3
2044 | 3
2 | 2
6 | 2
10 | 2
14 | 2
18 | 2
22 | 2
... | ...
2039 | 1
2041 | 1
2043 | 1
2045 | 1
2047 | 1
(2048 rows)