4 ms·

One thing I haven't had much success with when trying editors like this is dealing with variable data, like Pascal-style strings or varints. Another one is a l

One thing I haven't had much success with when trying editors like this is dealing with variable data, like Pascal-style strings or varints. Another one is a length field that is either one byte, or a NUL byte followed by two bytes, or three NUL bytes followed by four bytes. I'll have to give this one a try. It would be nice to be able to sift through binary data like bytecode or some non-standard serialization format without writing a one-off utility for it.

kenny11 6y ago
I spent a long time looking for something similar to sift through binary files and found this: https://www.sweetscape.com/010editor/ https://www.sweetscape.com/010editor/ It lets you write "templates" in a weird hybrid syntax that looks a lot like a C header file but also allows control statements that can decode complicated data structures in a few lines of script. It looks to have very similar capabilities to GNU Poke, but with a GUI.
- chris_wot 6y ago
  The poke creator seems to have a very dim view of 010.
  - rurban 6y ago
    Exactly. Much worse syntax choices. Would not want to spend my time with it, when I have much more with 101. But it least the VM is much faster than 101
- kodachi 6y ago
  https://ide.kaitai.io/ https://ide.kaitai.io/ has a yaml syntax, and its online editor has tons of examples.
digikata 6y ago
I recently tried Kaitai for something like this. It worked for some nontrivial cases, but I felt like I kept getting bitten by syntax limitations. All the way through, I kept wondering if writing a one off utility might be faster. But it was possible to express variable structures, sizes and counts. I was using the syntax and the cmd line visualizer, but might have been more productive with their html/gui tooling. http://kaitai.io/ http://kaitai.io/
badsectoracula 6y ago
I skimmed through the manual and from what i can tell this seems to be more of a language (with a REPL) with support for handling data streams (they call them I/O Spaces for some reason) than an editor. There does seem to be support for declaring types of variable length and it is one of the first examples: type Packet = struct { byte magic; uint<16> length; byte[length] data; } It also seems to have optional fields using conditions, using the optional extended header in MP3 id3v2 tag as an example: struct ID3V2_Tag = struct { ID3V2_Hdr hdr; IDV2_Ext_Hdr ext_hdr if hdr.extended_hdr_present; } (this is an alternative to another way it provides by using unions which work similar to C unions but each alternative also has conditions for when it is valid). So at least from the above i think it should be possible to declare types that work with variable length and prefixes like that.

kenny11 6y ago

I spent a long time looking for something similar to sift through binary files and found this: https://www.sweetscape.com/010editor/ https://www.sweetscape.com/010editor/ It lets you write "templates" in a weird hybrid syntax that looks a lot like a C header file but also allows control statements that can decode complicated data structures in a few lines of script. It looks to have very similar capabilities to GNU Poke, but with a GUI.

chris_wot 6y ago
The poke creator seems to have a very dim view of 010.
- rurban 6y ago
  Exactly. Much worse syntax choices. Would not want to spend my time with it, when I have much more with 101. But it least the VM is much faster than 101
kodachi 6y ago
https://ide.kaitai.io/ https://ide.kaitai.io/ has a yaml syntax, and its online editor has tons of examples.

digikata 6y ago

I recently tried Kaitai for something like this. It worked for some nontrivial cases, but I felt like I kept getting bitten by syntax limitations. All the way through, I kept wondering if writing a one off utility might be faster. But it was possible to express variable structures, sizes and counts. I was using the syntax and the cmd line visualizer, but might have been more productive with their html/gui tooling. http://kaitai.io/ http://kaitai.io/

badsectoracula 6y ago

I skimmed through the manual and from what i can tell this seems to be more of a language (with a REPL) with support for handling data streams (they call them I/O Spaces for some reason) than an editor. There does seem to be support for declaring types of variable length and it is one of the first examples: type Packet = struct { byte magic; uint<16> length; byte[length] data; } It also seems to have optional fields using conditions, using the optional extended header in MP3 id3v2 tag as an example: struct ID3V2_Tag = struct { ID3V2_Hdr hdr; IDV2_Ext_Hdr ext_hdr if hdr.extended_hdr_present; } (this is an alternative to another way it provides by using unions which work similar to C unions but each alternative also has conditions for when it is valid). So at least from the above i think it should be possible to declare types that work with variable length and prefixes like that.