Fix ubsan with passing nullptr to qsort()
diff --git a/src/hb-array.hh b/src/hb-array.hh
index a4dce4b..52b775e 100644
--- a/src/hb-array.hh
+++ b/src/hb-array.hh
@@ -119,19 +119,22 @@
hb_sorted_array_t<Type> qsort (int (*cmp_)(const void*, const void*))
{
- ::qsort (arrayZ, length, this->item_size, cmp_);
+ if (likely (length))
+ ::qsort (arrayZ, length, this->item_size, cmp_);
return hb_sorted_array_t<Type> (*this);
}
hb_sorted_array_t<Type> qsort ()
{
- ::qsort (arrayZ, length, this->item_size, Type::cmp);
+ if (likely (length))
+ ::qsort (arrayZ, length, this->item_size, Type::cmp);
return hb_sorted_array_t<Type> (*this);
}
void qsort (unsigned int start, unsigned int end)
{
end = MIN (end, length);
assert (start <= end);
- ::qsort (arrayZ + start, end - start, this->item_size, Type::cmp);
+ if (likely (start < end))
+ ::qsort (arrayZ + start, end - start, this->item_size, Type::cmp);
}
/*
