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/*
 * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of The TenDRA Project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id$
 */
/*
                 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright
    owned by the United Kingdom Secretary of State for Defence
    acting through the Defence Evaluation and Research Agency
    (DERA).  It is made available to Recipients with a
    royalty-free licence for its use, reproduction, transfer
    to other parties and amendment for any purpose not excluding
    product development provided that any such use et cetera
    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is
        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to
        show both the nature of and the organisation responsible
        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another
        party shall be deemed to be that party's acceptance of
        these conditions;

        (4) DERA gives no warranty or assurance as to its
        quality or suitability for any purpose and DERA accepts
        no liability whatsoever in relation to any use to which
        it may be put.
*/


/**********************************************************************
$Author: release $
$Date: 1998/01/17 15:55:47 $
$Revision: 1.1.1.1 $
$Log: flpttypes.h,v $
 * Revision 1.1.1.1  1998/01/17  15:55:47  release
 * First version to be checked into rolling release.
 *
 * Revision 1.1  1995/04/06  10:44:05  currie
 * Initial revision
 *
***********************************************************************/
#ifndef flpttypekey
#define flpttypekey 1

#include <limits.h>

#include "fbase.h"


#if FBASE == 10

/* FBASE 10 is obsolete */

#define MANT_SIZE 40

#define Fdig unsigned char

#define FNUM_SIZE 65            /* max size required by flt2str */
/* MANT_SIZE + 1(sign) + 1(point) + 2(E+sign) + log(MAX_LONG) + 1(null) */

#define E_MIN   (-1000000)      /* (LONG_MIN/10) doesnt work on 80386 cc
                                */
#define E_MAX   (LONG_MAX / 10)

/* Function status values:   */
#define OKAY            0
#define EXP2BIG (-1)
#define SYNTAX          (-2)
#define DIVBY0          (-3)

/* Rounding types:   */
#define R2ZERO  0
#define R2PINF  1
#define R2NINF  2
#define R2NEAR  3

/* floating point representation */
typedef struct _flt {
  Fdig mant[MANT_SIZE]; /* mantissa digit values [0-9] (NOT '0' to '9') */
  /* point is between 1st and 2nd digits */
  int sign;             /* -1: negative; +1: positive; 0: value is zero */
  int exp;              /* signed exponent; in range E_MIN..E_MAX */
} flt;

#else

/* all installers should use this definition */

/* MANT_SIZE is the number of mantissa array elements */
#ifndef MANT_SIZE
#define MANT_SIZE 8
#endif


#define Fdig unsigned short
/* FBITS is the number of bits in one array element */
#define FBITS 16

#define E_MIN   (-16384)
#define E_MAX   (LONG_MAX / FBASE)

/* Function status values:   */
#define OKAY            0
#define EXP2BIG (-1)
#define SYNTAX          (-2)
#define DIVBY0          (-3)

/* Rounding types:   */
#define R2ZERO  3
#define R2PINF  2
#define R2NINF  1
#define R2NEAR  0

typedef struct _flt {
  Fdig mant[MANT_SIZE];
  /* point is between 1st and 2nd digits */
  int sign;             /* -1: negative; +1: positive; 0: value is zero */
  int exp;              /* signed exponent; in range E_MIN..E_MAX */
} flt;  /* floating point representation */


/* type for result of conversion of reals to ints */
typedef struct r2l_t {
        int i1; /* least significant */
        int i2;
        int i3;
        int i4; /* most significant */
} r2l;

#endif

typedef struct flt64_t {
  int big;              /* more significant 32 bits */
  unsigned int small;   /* less significant 32 bits */
} flt64;
/* used to convert flpt number which are integers into a 64 bit
 * representation */

#endif /* flpttypekey */