ALL: Add flint

external/flint-2.4.3/fmpq_poly/set_array_mpq.c

@@ -0,0 +1,72 @@
+/*=============================================================================
+
+    This file is part of FLINT.
+
+    FLINT 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 of the License, or
+    (at your option) any later version.
+
+    FLINT 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 FLINT; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+
+=============================================================================*/
+/******************************************************************************
+
+    Copyright (C) 2010, 2011 Sebastian Pancratz
+
+******************************************************************************/
+
+#include <gmp.h>
+#include "flint.h"
+#include "fmpz.h"
+#include "fmpz_poly.h"
+#include "fmpq_poly.h"
+
+void
+_fmpq_poly_set_array_mpq(fmpz * poly, fmpz_t den, const mpq_t * a, slong n)
+{
+    slong i;
+    mpz_t d, t;
+
+    flint_mpz_init_set_ui(d, 1);
+    mpz_init(t);
+    for (i = 0; i < n; i++)
+    {
+        mpz_lcm(d, d, mpq_denref(a[i]));
+    }
+
+    for (i = 0; i < n; i++)
+    {
+        __mpz_struct *ptr = _fmpz_promote(poly + i);
+
+        mpz_divexact(t, d, mpq_denref(a[i]));
+        mpz_mul(ptr, mpq_numref(a[i]), t);
+        _fmpz_demote_val(poly + i);
+    }
+
+    fmpz_set_mpz(den, d);
+    mpz_clear(d);
+    mpz_clear(t);
+}
+
+void fmpq_poly_set_array_mpq(fmpq_poly_t poly, const mpq_t * a, slong n)
+{
+    if (n == 0)
+    {
+        fmpq_poly_zero(poly);
+    }
+    else
+    {
+        fmpq_poly_fit_length(poly, n);
+        _fmpq_poly_set_array_mpq(poly->coeffs, poly->den, a, n);
+        _fmpq_poly_set_length(poly, n);
+        _fmpq_poly_normalise(poly);
+    }
+}