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hachoir reviews and mentions
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Magika: AI powered fast and efficient file type identification
https://github.com/vstinner/hachoir/blob/main/hachoir/subfil...
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Kaitai Struct: A new way to develop parsers for binary structures
I contributed a number of file formats a few years ago (and attempted numerous others) but ran into a number of problems with certain file formats:
1. It's not possible to read from the file until a multiple byte termination sequence is detected. [1]
2. You can't read sections of a file where the termination condition is the presence of a sequence of bytes denoting the next unrelated section of the file (and you don't want to consume/read these bytes) [2]
3. The WebIDE at the time couldn't handle very large file format specifications such as Photoshop (PSD) [3]
4. Files containing compressed or encrypted sections require a compression/encryption algorithm to be hardcoded into Kaitai struct libraries for each programming language it can output to.
The WebIDE I particularly liked as it makes it easy to get started and share results. I also liked how Kaitai Struct allows easy definition of constraints (simple ones at least) into the file format specification so that you can say "this section of the file shall have a size not exceeding header.length * 2 bytes".
Some alternative binary file format specification attempts for those interested in seeing alternatives, each with their own set of problems/pros/cons:
1. 010 Editor [4]
2. Synalysis [5]
3. hachoir [6]
4. DFDL [7]
[1] https://github.com/kaitai-io/kaitai_struct/issues/158
[2] https://github.com/kaitai-io/kaitai_struct/issues/156
[3] https://raw.githubusercontent.com/davidhicks/kaitai_struct_f...
[4] https://www.sweetscape.com/010editor/repository/templates/
[5] https://github.com/synalysis/Grammars
[6] https://github.com/vstinner/hachoir/tree/main/hachoir/parser
[7] https://github.com/DFDLSchemas/
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PyWhat: Identify Anything
Another one sort of related is hachoir, and specifically the hachoir-metadata script: https://github.com/vstinner/hachoir
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A note from our sponsor - InfluxDB
www.influxdata.com | 24 Apr 2024
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vstinner/hachoir is an open source project licensed under GNU General Public License v3.0 only which is an OSI approved license.
The primary programming language of hachoir is Python.
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