GetAvailableLanguagesAsVector() can list unrelated files due to invalid extension handling

[danpla]

Current Behavior

The file extension handling code in

tesseract/src/api/baseapi.cpp

Lines 154 to 157 in d39177e

	auto extPos = path.rfind(".traineddata");
	if (extPos != std::string::npos) {
	langs->push_back(path.substr(0, extPos));
	}

only checks that the file name has a ".taineddata" substring rather than strictly ends with it. As the result, the GetAvailableLanguagesAsVector() method can treat unrelated files (in my case, *.traineddata.sha256) as languages.

Expected Behavior

No response

Suggested Fix

Use std::filesystem::path::extension().

tesseract -v

5.5.0

Operating System

No response

Other Operating System

No response

uname -a

No response

Compiler

No response

CPU

No response

Virtualization / Containers

No response

Other Information

No response

[stweil]

Thanks for your report. The issue is now fixed in the main branch (see pull request #4417).