Android Question Search byte sequence in file, and extract portions from it

[designer2k2]

Hello,

im lost in searching for a way to get this done

I have a file, where i need to find 2 byte sequences, and then extract the data between this 2 positions into a new file.

This is simple in python:

pos1 = data.find(bytes([0x13, 0x43, 0x44, 0x3f])
pos2 = data.find(bytes([0x12, 0x34, 0x3f])
new = data[pos1:pos2-pos1]

but in B4A the byte array has no search function?

I read the file like this:

Dim b as Bytes()
b = File.ReadBytes(Dir,Path)

Any idea or direction what i can follow up to get this going?

greetings,
d2k2

 

[DonManfred]

Use bytesbuilder. I guess it should be doable with it.

 

[designer2k2]

WOA! Thank you DonManfred!

https://www.b4x.com/android/forum/t...implifies-working-with-arrays-of-bytes.89008/

With IndexOf and SubArray2 this reads as perfect solution