File: realtype.h

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/* Ergo, version 3.8.2, a program for linear scaling electronic structure
 * calculations.
 * Copyright (C) 2023 Elias Rudberg, Emanuel H. Rubensson, Pawel Salek,
 * and Anastasia Kruchinina.
 * 
 * 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 3 of the License, or
 * (at your option) any later version.
 * 
 * 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.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * Primary academic reference:
 * Ergo: An open-source program for linear-scaling electronic structure
 * calculations,
 * Elias Rudberg, Emanuel H. Rubensson, Pawel Salek, and Anastasia
 * Kruchinina,
 * SoftwareX 7, 107 (2018),
 * <http://dx.doi.org/10.1016/j.softx.2018.03.005>
 * 
 * For further information about Ergo, see <http://www.ergoscf.org>.
 */

/** @file realtype.h

    @brief Definition of the main floating-point datatype used; the
    ergo_real type.

    @author: Elias Rudberg <em>responsible</em>
*/

#ifndef REALTYPEHEADER
#define REALTYPEHEADER

#include "config.h"

#ifdef PRECISION_SINGLE
typedef float ergo_real;
typedef double ergo_long_real;
#define REALTYPE_DEFINED_OK
#endif

#ifdef PRECISION_DOUBLE
typedef double ergo_real;
typedef double ergo_long_real;
#define REALTYPE_DEFINED_OK
#endif

#ifdef PRECISION_LONG_DOUBLE
typedef long double ergo_real;
typedef long double ergo_long_real;
#define REALTYPE_DEFINED_OK
#endif

#ifdef PRECISION_QUAD_FLT128
typedef __float128 ergo_real;
typedef __float128 ergo_long_real;
#define REALTYPE_DEFINED_OK
#endif

/* if precision not specified, use double as default */
#ifndef REALTYPE_DEFINED_OK
typedef double ergo_real;
typedef double ergo_long_real;
#endif

#endif