/* Copyright (c) 1997-2007 Ewgenij Gawrilow, Michael Joswig (Technische Universitaet Berlin, Germany) http://www.math.tu-berlin.de/polymake, mailto:polymake@math.tu-berlin.de This program 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, or (at your option) any later version: http://www.gnu.org/licenses/gpl.txt. This program 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. */ #ifndef _POLYMAKE_GMP_INIT_H #define _POLYMAKE_GMP_INIT_H "$Project: polymake $$Id: gmp_init.h 7556 2007-01-12 17:36:36Z gawrilow $" //#include <ext/defines.h> #include <gmp.h> struct gmp_alloc_init { gmp_alloc_init(); }; namespace { gmp_alloc_init do_init; } namespace std_ext { template <typename _Key> struct hash; template <> struct hash<MP_INT> { protected: size_t _do(mpz_srcptr a) const { size_t result=0; for (int i=0, n=mpz_size(a); i<n; ++i) (result <<= 1) ^= mpz_getlimbn(a, i); return result; } public: size_t operator() (const MP_INT& a) const { return _do(&a); } }; } #endif // _POLYMAKE_GMP_INIT_H // Local Variables: // mode:C++ // End: