/*
 *  Copyright (C) 2004-2021 Edward F. Valeev
 *
 *  This file is part of Libint.
 *
 *  Libint is free software: you can redistribute it and/or modify
 *  it under the terms of 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.
 *
 *  Libint 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with Libint.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef _libint2_include_libint2intrinsictypes_h_
#define _libint2_include_libint2intrinsictypes_h_

#include <libint2/config.h>

#include <limits.h>

/* determine default LIBINT2 64-bit integer */
#ifdef HAVE_STDINT_H

#include <stdint.h>
/* because mpz_class does not mesh with long long types, only use those when absolutely necessary */
#if UINT_LEAST64_MAX != ULONG_MAX
  typedef uint_least64_t LIBINT2_UINT_LEAST64;
#else
  typedef unsigned long int LIBINT2_UINT_LEAST64;
#endif
#if INT_LEAST64_MAX != LONG_MAX
  typedef int_least64_t LIBINT2_INT_LEAST64;
#else
  typedef long int LIBINT2_INT_LEAST64;
#endif

#else

#if defined(ULONGLONG_MAX) && !defined(ULLONG_MAX)
#    define ULLONG_MAX ULONGLONG_MAX
#endif

# ifdef ULLONG_MAX
#   if ULONGLONG_MAX == (0xffffffffffffffffuLL) /* uLL reqd for xlC */
     typedef long long LIBINT2_INT_LEAST64; 
     typedef unsigned long long LIBINT2_UINT_LEAST64; 
#   else
#     error defaults not correct; you must hand modify libint2_intrinsic_types.h
#   endif
# elif ULONG_MAX != 0xffffffff

#   if ULONG_MAX == 18446744073709551615 /* 2**64 - 1 */
     typedef long LIBINT2_INT_LEAST64;
     typedef unsigned long LIBINT2_UINT_LEAST64;
#   else
#     error defaults not correct; you must hand modify scint.h
#   endif
# else /* assume no 64-bit integers */
#   error 64 bit integer types are required
# endif

#endif /* HAVE_STDINT_H */

#endif
