external/liborcus/gnumeric-set-grammar.patch.1


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diff --git a/src/liborcus/orcus_gnumeric.cpp b/src/liborcus/orcus_gnumeric.cpp
index 76c13682..849759ba 100644
--- a/src/liborcus/orcus_gnumeric.cpp
+++ b/src/liborcus/orcus_gnumeric.cpp
@@ -144,6 +144,12 @@ void orcus_gnumeric::read_stream(std::string_view stream)
     if (!decompress_gzip(stream.data(), stream.size(), file_content))
         return;
 
+    if (auto* gs = mp_impl->mp_factory->get_global_settings(); gs)
+    {
+        gs->set_origin_date(1899, 12, 30);
+        gs->set_default_formula_grammar(spreadsheet::formula_grammar_t::gnumeric);
+    }
+
     mp_impl->read_content_xml(file_content, get_config());
     mp_impl->mp_factory->finalize();
 }