1 files changed, 79 insertions, 0 deletions
diff --git a/contrib/libgmp/mpq/mul.c b/contrib/libgmp/mpq/mul.c
new file mode 100644
index 0000000..35f960c
--- /dev/null
+++ b/contrib/libgmp/mpq/mul.c
@@ -0,0 +1,79 @@
+/* mpq_mul -- mutiply two rational numbers.
+
+Copyright (C) 1991, 1994, 1995, 1996 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 Library General Public License as published by
+the Free Software Foundation; either version 2 of the License, 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+void
+#if __STDC__
+mpq_mul (mpq_ptr prod, mpq_srcptr op1, mpq_srcptr op2)
+#else
+mpq_mul (prod, op1, op2)
+     mpq_ptr prod;
+     mpq_srcptr op1;
+     mpq_srcptr op2;
+#endif
+{
+  mpz_t gcd1, gcd2;
+  mpz_t tmp1, tmp2;
+
+  mpz_init (gcd1);
+  mpz_init (gcd2);
+  mpz_init (tmp1);
+  mpz_init (tmp2);
+
+  /* PROD might be identical to either operand, so don't store the
+     result there until we are finished with the input operands.  We
+     dare to overwrite the numerator of PROD when we are finished
+     with the numerators of OP1 and OP2.  */
+
+  mpz_gcd (gcd1, &(op1->_mp_num), &(op2->_mp_den));
+  mpz_gcd (gcd2, &(op2->_mp_num), &(op1->_mp_den));
+
+  if (gcd1->_mp_size > 1 || gcd1->_mp_d[0] != 1)
+    mpz_divexact (tmp1, &(op1->_mp_num), gcd1);
+  else
+    mpz_set (tmp1, &(op1->_mp_num));
+
+  if (gcd2->_mp_size > 1 || gcd2->_mp_d[0] != 1)
+    mpz_divexact (tmp2, &(op2->_mp_num), gcd2);
+  else
+    mpz_set (tmp2, &(op2->_mp_num));
+
+  mpz_mul (&(prod->_mp_num), tmp1, tmp2);
+
+  if (gcd1->_mp_size > 1 || gcd1->_mp_d[0] != 1)
+    mpz_divexact (tmp1, &(op2->_mp_den), gcd1);
+  else
+    mpz_set (tmp1, &(op2->_mp_den));
+
+  if (gcd2->_mp_size > 1 || gcd2->_mp_d[0] != 1)
+    mpz_divexact (tmp2, &(op1->_mp_den), gcd2);
+  else
+    mpz_set (tmp2, &(op1->_mp_den));
+
+  mpz_mul (&(prod->_mp_den), tmp1, tmp2);
+
+  mpz_clear (tmp2);
+  mpz_clear (tmp1);
+  mpz_clear (gcd2);
+  mpz_clear (gcd1);
+}