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GetAvailableLanguagesAsVector() can list unrelated files due to invalid extension handling #4416

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GetAvailableLanguagesAsVector() can list unrelated files due to invalid extension handling#4416
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@danpla

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@danpla
danpla
opened on Apr 26, 2025

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

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Suggested Fix

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

tesseract -v

5.5.0

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