Revert "Remove gmp from AOS"
This reverts commit f37c97684f0910a3f241394549392f00145ab0f7.
We need gmp for SymEngine for symbolicmanipultion in C++
Change-Id: Ia13216d1715cf96944f7b4f422b7a799f921d4a4
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/third_party/gmp/mpz/invert.c b/third_party/gmp/mpz/invert.c
new file mode 100644
index 0000000..5532d13
--- /dev/null
+++ b/third_party/gmp/mpz/invert.c
@@ -0,0 +1,72 @@
+/* mpz_invert (inv, x, n). Find multiplicative inverse of X in Z(N).
+ If X has an inverse, return non-zero and store inverse in INVERSE,
+ otherwise, return 0 and put garbage in INVERSE.
+
+Copyright 1996-2001, 2005, 2012, 2014 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"
+
+int
+mpz_invert (mpz_ptr inverse, mpz_srcptr x, mpz_srcptr n)
+{
+ mpz_t gcd, tmp;
+ mp_size_t xsize, nsize, size;
+ TMP_DECL;
+
+ xsize = ABSIZ (x);
+ nsize = ABSIZ (n);
+
+ size = MAX (xsize, nsize) + 1;
+ TMP_MARK;
+
+ MPZ_TMP_INIT (gcd, size);
+ MPZ_TMP_INIT (tmp, size);
+ mpz_gcdext (gcd, tmp, (mpz_ptr) 0, x, n);
+
+ /* If no inverse existed, return with an indication of that. */
+ if (!MPZ_EQUAL_1_P (gcd))
+ {
+ TMP_FREE;
+ return 0;
+ }
+
+ /* Make sure we return a positive inverse. */
+ if (SIZ (tmp) < 0)
+ {
+ if (SIZ (n) < 0)
+ mpz_sub (inverse, tmp, n);
+ else
+ mpz_add (inverse, tmp, n);
+ }
+ else
+ mpz_set (inverse, tmp);
+
+ TMP_FREE;
+ return 1;
+}