Storage Format of QQ records

I am free recently .........

I want to decrypt msgex. DB and study it ......

Let's talk about its storage format ......

1	19''
2	21''
3	48 '0'
4	65 'A'
5	48 '0'
6	48 '0'
7	48 '0'
8	48 '0'
9	70 'F'
10	70 'F'
11	48 '0'
12	48 '0'
13	56 '8'
14	54 '6'
15	48 '0'
16	50'2'
17	23435 'song'
18	20307 'body'
19	13 '/R'

If you decrypt a chat record, it will end with a string similar to the above.

In fact, this string of characters is the format of recorded text.

1	19''
2	21''

I guess it's the starting mark.

3	48 '0'
4	65 'A'

These two fields are quite special. For (3), it is actually a hexadecimal number, that is, 0000 of the binary.

Where,

The first 0 represents whether it is in bold.

2nd 0 indicates whether to tilt

3rd 0 indicates whether to underline

4th zeros, which are related to the next word,

For (4), it indicates the font size. When the font size exceeds 16 (including 16), it cannot be expressed by a hexadecimal number.

At this time, 4th zeros are marked as 1, and the font size is expressed as 16 + (4 ).

That is, words of No. 18, which are not in bold and not skewed, are displayed as follows:

3	49 '1'
4	50'2'

 

While

5	48 '0'
6	48 '0'
7	48 '0'
8	48 '0'
9	70 'F'
10	70 'F'

The font color ......

The rest

11	48 '0'
12	48 '0'
13	56 '8'
14	54 '6'
15	48 '0'
16	50'2'

It is estimated that it is the word encoding ...... I don't know anything about it ......

Next

17	23435 'song'
18	20307 'body'

Represents the font name

Last

19

13 '/R'

It actually represents the number of bytes of values 13, namely (3)-(10) and (17)-(19) (the number of Chinese characters is 2 bytes ......

 

P.s.: I have observed and studied the above ...... Something wrong ...... Please advise ......