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/* latte_ntl.cpp -- Interface to NTL
Copyright 2006 Matthias Koeppe
This file is part of LattE.
LattE is free software; you can redistribute it and/or modify it
under the terms of the version 2 of the GNU General Public License
as published by the Free Software Foundation.
LattE 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 LattE; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <cassert>
#include <iostream>
#include <climits>
#include "latte_ntl.h"
#include "latte_gmp.h"
void
InnerProductModulo(ZZ &result, const vec_ZZ &a, const vec_ZZ &b, const ZZ &module)
{
#if 1
InnerProduct(result, a, b);
rem(result, result, module);
#else
/* very slow! */
result = 0;
assert(a.length() == b.length());
int dimension = a.length();
int i;
ZZ ai, bi, p;
for (i = 0; i<dimension; i++) {
rem(ai, a[i], module);
rem(bi, b[i], module);
MulMod(p, ai, bi, module);
AddMod(result, result, p, module);
}
#endif
}
int
convert_ZZ_to_int(const ZZ &zz)
{
mpz_class z = convert_ZZ_to_mpz(zz);
if (abs(z) > INT_MAX) {
std::cerr << "Numbers too large for conversion to machine integer" << std::endl;
abort();
}
return mpz_get_si(z.get_mpz_t());
}
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