Add libgmp 6.2.0 to third_party
Don't build it yet. That will come in the next review.
Change-Id: Idf3266558165e5ab45f4a41c98cc8c838c8244d5
diff --git a/third_party/gmp/mpq/swap.c b/third_party/gmp/mpq/swap.c
new file mode 100644
index 0000000..e5152d4
--- /dev/null
+++ b/third_party/gmp/mpq/swap.c
@@ -0,0 +1,42 @@
+/* mpq_swap (U, V) -- Swap U and V.
+
+Copyright 1997, 1998, 2000, 2001, 2018 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 either:
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your
+ option) any later version.
+
+or
+
+ * the GNU General Public License as published by the Free Software
+ Foundation; either version 2 of the License, or (at your option) any
+ later version.
+
+or both in parallel, as here.
+
+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 copies of the GNU General Public License and the
+GNU Lesser General Public License along with the GNU MP Library. If not,
+see https://www.gnu.org/licenses/. */
+
+#include "gmp-impl.h"
+
+void
+mpq_swap (mpq_ptr u, mpq_ptr v) __GMP_NOTHROW
+{
+ MP_SIZE_T_SWAP (ALLOC(NUM(u)), ALLOC(NUM(v)));
+ MP_SIZE_T_SWAP (ALLOC(DEN(u)), ALLOC(DEN(v)));
+ MP_SIZE_T_SWAP (SIZ(NUM(u)), SIZ(NUM(v)));
+ MP_SIZE_T_SWAP (SIZ(DEN(u)), SIZ(DEN(v)));
+ MP_PTR_SWAP (PTR(NUM(u)), PTR(NUM(v)));
+ MP_PTR_SWAP (PTR(DEN(u)), PTR(DEN(v)));
+}