--- /dev/null
+/* mpq_get_den(den,rat_src) -- Set DEN to the denominator of RAT_SRC.
+
+Copyright (C) 1991 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+The GNU MP Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU MP Library; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+void
+#ifdef __STDC__
+mpq_get_den (MP_INT *den, const MP_RAT *src)
+#else
+mpq_get_den (den, src)
+ MP_INT *den;
+ const MP_RAT *src;
+#endif
+{
+ mp_size size = src->den.size;
+
+ if (den->alloc < size)
+ _mpz_realloc (den, size);
+
+ MPN_COPY (den->d, src->den.d, size);
+ den->size = size;
+}