RegEx search by hex code

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citro
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RegEx search by hex code

Post by *citro »

I am dealing with some binary files and I'm trying to search them using RegEx option.

In particular, I am searching for 0x00 (\x00) and 0x01 (\x01) char codes.

When I'm searching for \x00, I find nothing, but I also don't get the "Not found" alert box.

When I'm searching for \x01, I find lost of false positives (including 0x00s).
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MVV
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Post by *MVV »

I think regex just thinks that \x00 is an empty search string.

For me, \x01 finds only zero bytes, no more false positives. It is an interesting thing that TC's regex finds \x00 when you type \x01! It looks like a way to find zero bytes, it even allows to find files that doesn't contain zero bytes!
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Post by *citro »

I think there is something wrong (a bug).

Searching 00 with "Search hex string" find all \x00 chars.
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ghisler(Author)
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Post by *ghisler(Author) »

Sorry, this is a limitation of the used regex library. Searching for 00 characters is not reliable. The library is meant for finding text in text files.
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MarkFilipak
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Re: RegEx search by hex code

Post by *MarkFilipak »

Re: viewtopic.php?f=3&t=72997

Could you fix this, Christian? It appears that when '\x00' is in the pattern, the match is '\x00' plus the next byte. The search index is now off by 1 and the remainder of the pattern is not matched, even if it is there. This appears to happen only for '\x00' (and maybe only if it's the 1st byte but I don't have the source code and I don't have the patience to grope for more clues).
Hi Christian! Delighted customer since 1999. License #37627
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Horst.Epp
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Re: RegEx search by hex code

Post by *Horst.Epp »

MarkFilipak wrote: 2020-10-12, 17:09 UTC Re: viewtopic.php?f=3&t=72997

Could you fix this, Christian? It appears that when '\x00' is in the pattern, the match is '\x00' plus the next byte. The search index is now off by 1 and the remainder of the pattern is not matched, even if it is there. This appears to happen only for '\x00' (and maybe only if it's the 1st byte but I don't have the source code and I don't have the patience to grope for more clues).
I guess you are not running TC version 7.56 or 7.57 :)
So hijacking an old thread make no sense for me.
Windows 11 Home, Version 24H2 (OS Build 26100.2605)
TC 11.50RC1 x64 / x86
Everything 1.5.0.1387a (x64), Everything Toolbar 1.5.1, Listary Pro 6.3.1.84
QAP 11.6.4 x64
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Re: RegEx search by hex code

Post by *MarkFilipak »

Horst.Epp wrote: 2020-10-12, 17:42 UTC
MarkFilipak wrote: 2020-10-12, 17:09 UTC Re: viewtopic.php?f=3&t=72997

Could you fix this, Christian? It appears that when '\x00' is in the pattern, the match is '\x00' plus the next byte. The search index is now off by 1 and the remainder of the pattern is not matched, even if it is there. This appears to happen only for '\x00' (and maybe only if it's the 1st byte but I don't have the source code and I don't have the patience to grope for more clues).
I guess you are not running TC version 7.56 or 7.57 :)
So hijacking an old thread make no sense for me.
I'm running version 9.51. Does that really matter to you? It's still a problem. It's still the same problem.
Hi Christian! Delighted customer since 1999. License #37627
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Horst.Epp
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Re: RegEx search by hex code

Post by *Horst.Epp »

MarkFilipak wrote: 2020-10-12, 19:08 UTC
Horst.Epp wrote: 2020-10-12, 17:42 UTC
MarkFilipak wrote: 2020-10-12, 17:09 UTC Re: viewtopic.php?f=3&t=72997

Could you fix this, Christian? It appears that when '\x00' is in the pattern, the match is '\x00' plus the next byte. The search index is now off by 1 and the remainder of the pattern is not matched, even if it is there. This appears to happen only for '\x00' (and maybe only if it's the 1st byte but I don't have the source code and I don't have the patience to grope for more clues).
I guess you are not running TC version 7.56 or 7.57 :)
So hijacking an old thread make no sense for me.
I'm running version 9.51. Does that really matter to you? It's still a problem. It's still the same problem.
It matters because I'm normaly not interested to read error reports for such old versions of TC
Windows 11 Home, Version 24H2 (OS Build 26100.2605)
TC 11.50RC1 x64 / x86
Everything 1.5.0.1387a (x64), Everything Toolbar 1.5.1, Listary Pro 6.3.1.84
QAP 11.6.4 x64
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MarkFilipak
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Re: RegEx search by hex code

Post by *MarkFilipak »

Horst.Epp wrote: 2020-10-12, 20:08 UTC It matters because I'm normaly not interested to read error reports for such old versions of TC
But I'm not reporting a problem "for such old versions of TC". I'm reporting a problem for the current version.

If you think I should do something different, what is it?
Hi Christian! Delighted customer since 1999. License #37627
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Horst.Epp
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Re: RegEx search by hex code

Post by *Horst.Epp »

MarkFilipak wrote: 2020-10-12, 21:14 UTC
Horst.Epp wrote: 2020-10-12, 20:08 UTC It matters because I'm normaly not interested to read error reports for such old versions of TC
But I'm not reporting a problem "for such old versions of TC". I'm reporting a problem for the current version.

If you think I should do something different, what is it?
Look into the title of this Sub-Forum
It says TC7.56(a)/7.57 bug reports
There is a Forum for 9.5x bug reports.
Windows 11 Home, Version 24H2 (OS Build 26100.2605)
TC 11.50RC1 x64 / x86
Everything 1.5.0.1387a (x64), Everything Toolbar 1.5.1, Listary Pro 6.3.1.84
QAP 11.6.4 x64
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MarkFilipak
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Re: RegEx search by hex code

Post by *MarkFilipak »

Horst.Epp wrote: 2020-10-13, 08:33 UTC
MarkFilipak wrote: 2020-10-12, 21:14 UTC
Horst.Epp wrote: 2020-10-12, 20:08 UTC It matters because I'm normaly not interested to read error reports for such old versions of TC
But I'm not reporting a problem "for such old versions of TC". I'm reporting a problem for the current version.

If you think I should do something different, what is it?
Look into the title of this Sub-Forum
It says TC7.56(a)/7.57 bug reports
There is a Forum for 9.5x bug reports.
Oh. Forgive me. I was given a link to this thread. I didn't know its sub-forum was limited in any way.
Hi Christian! Delighted customer since 1999. License #37627
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