qofmath128.h

/********************************************************************
 * qofmath128.h -- an 128-bit integer library                       *
 * Copyright (C) 2004 Linas Vepstas <linas@linas.org>               *
 *                                                                  *
 * 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 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, contact:                        *
 *                                                                  *
 * Free Software Foundation           Voice:  +1-617-542-5942       *
 * 51 Franklin Street, Fifth Floor    Fax:    +1-617-542-2652       *
 * Boston, MA  02110-1301,  USA       gnu@gnu.org                   *
 *                                                                  *
 *******************************************************************/

#ifndef QOF_MATH_128_H
#define QOF_MATH_128_H

#include <glib.h>

typedef struct
{
    guint64 hi;
    guint64 lo;
    gshort isneg;  
    gshort isbig;  
} QofInt128;

inline gboolean equal128 (QofInt128 a, QofInt128 b);

inline gint cmp128 (QofInt128 a, QofInt128 b);

inline QofInt128 shift128 (QofInt128 x);

inline QofInt128 shiftleft128 (QofInt128 x);

inline QofInt128 inc128 (QofInt128 a);

inline QofInt128 add128 (QofInt128 a, QofInt128 b);

inline QofInt128 mult128 (gint64 a, gint64 b);

inline QofInt128 div128 (QofInt128 n, gint64 d);

inline gint64 rem128 (QofInt128 n, gint64 d);

inline guint64 gcf64 (guint64 num, guint64 denom);

inline QofInt128 lcm128 (guint64 a, guint64 b);

#endif

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