[8.01-32bit] Lister, regex search backwards

[white]

* Decode and unzip the file "testfile.txt" included below.
* View the file in Lister
* Search for "^[^ ]", Regex checked (search for non space character at the beginning of a line)
B(EGIN) is found
* Press F3 to repeat the search
E(END) is found
* Press Shift-F3 to repeat search backwards
t(ext) is found in the middle of a line?

Code: Select all

MIME-Version: 1.0
Content-Type: application/octet-stream; name="testfile.zip"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="testfile.zip"
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Same applies to older versions of Total Commander.

[umbra]

Hmm, looks like when TC searches using a RegEx backwards, it stops every 64KB and instead of continuing, it considers it as a start of the text.

In your example, both such boundaries are inside a text, which causes the RegEx to match them. If you modify the example, like adding a single space after the "BEGIN", the boundaries will move between words and the RegEx won't match them anymore.

Note: Take this with a grain of salt. I don't really know the cause of the problem, I just think, this is it.

[white]

The problem still exists in TC 8.50b2a.

[ghisler(Author)]

I'm sorry, I could not find a solution.

[white]

13.10.13 Fixed: Lister, search backwards for regular expressions -> ignore results which start at offset 0 of the search buffer (except at the start of the file) to avoid invalid results (e.g. when searching for the start of a line) (32/64)

Tested OK using TC 8.50b6 32 bit.

[ghisler(Author)]

It was quite tricky to fix, so I hope that it didn't introduce any new errors...