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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - fc-lang doesn't gracefully handle the case where the last language initial is < 'z'"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101348">101348</a>
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<th>Summary</th>
<td>fc-lang doesn't gracefully handle the case where the last language initial is < 'z'
</td>
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<th>Product</th>
<td>fontconfig
</td>
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<th>Version</th>
<td>2.12
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>minor
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>library
</td>
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<th>Assignee</th>
<td>fontconfig-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>f.rougon@free.fr
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<th>QA Contact</th>
<td>freedesktop@behdad.org
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=131801" name="attach_131801" title="Fix as Git commit (obtained with 'git format-patch)">attachment 131801</a> <a href="attachment.cgi?id=131801&action=edit" title="Fix as Git commit (obtained with 'git format-patch)">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=101348&attachment=131801'>[review]</a>
Fix as Git commit (obtained with 'git format-patch)
As reported at
<a href="https://lists.freedesktop.org/archives/fontconfig/2017-June/005940.html">https://lists.freedesktop.org/archives/fontconfig/2017-June/005940.html</a> :
FcLangSetIndex() contains code like this:
low = fcLangCharSetRanges[firstChar - 'a'].begin;
high = fcLangCharSetRanges[firstChar - 'a'].end;
/* no matches */
if (low > high)
The assumption behind this test didn't hold before the attached
commit/patch, unless there is at least one language name that starts
with 'z' (which is thankfully the case in our world :-). If the last
language name in lexicographic order starts for instance with 'x',
this change ensures that fcLangCharSetRanges['y' - 'a'].begin and
fcLangCharSetRanges['z' - 'a'].begin are equal to NUM_LANG_CHAR_SET,
in order to make the above assumption correct in all cases.</pre>
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