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/*
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Crown Copyright (c) 1997
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This TenDRA(r) Computer Program is subject to Copyright
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owned by the United Kingdom Secretary of State for Defence
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acting through the Defence Evaluation and Research Agency
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(DERA). It is made available to Recipients with a
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royalty-free licence for its use, reproduction, transfer
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to other parties and amendment for any purpose not excluding
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product development provided that any such use et cetera
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shall be deemed to be acceptance of the following conditions:-
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(1) Its Recipients shall ensure that this Notice is
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reproduced upon any copies or amended versions of it;
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(2) Any amended version of it shall be clearly marked to
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show both the nature of and the organisation responsible
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for the relevant amendment or amendments;
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(3) Its onward transfer from a recipient to another
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party shall be deemed to be that party's acceptance of
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these conditions;
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(4) DERA gives no warranty or assurance as to its
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quality or suitability for any purpose and DERA accepts
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no liability whatsoever in relation to any use to which
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it may be put.
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*/
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/**********************************************************************
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$Author: release $
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$Date: 1998/01/17 15:55:47 $
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$Revision: 1.1.1.1 $
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$Log: flpttypes.h,v $
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* Revision 1.1.1.1 1998/01/17 15:55:47 release
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* First version to be checked into rolling release.
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*
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* Revision 1.1 1995/04/06 10:44:05 currie
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* Initial revision
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*
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***********************************************************************/
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#ifndef flpttypekey
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#define flpttypekey 1
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#include <limits.h>
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#include "fbase.h"
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#if FBASE == 10
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/* FBASE 10 is obsolete */
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# define MANT_SIZE 40
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#define Fdig unsigned char
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# define FNUM_SIZE 65 /* max size required by flt2str */
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/* MANT_SIZE + 1(sign) + 1(point) + 2(E+sign) + log(MAX_LONG) + 1(null) */
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#define E_MIN (-1000000) /* (LONG_MIN/10) doesnt work on 80386 cc
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*/
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#define E_MAX (LONG_MAX/10)
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/* Function status values: */
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# define OKAY 0
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# define EXP2BIG (-1)
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# define SYNTAX (-2)
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# define DIVBY0 (-3)
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/* Rounding types: */
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# define R2ZERO 0
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# define R2PINF 1
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# define R2NINF 2
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# define R2NEAR 3
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typedef struct _flt {
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Fdig mant[MANT_SIZE];
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/* mantissa digit values [0-9] (NOT '0' to
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'9') */
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/* point is between 1st and 2nd digits */
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int sign; /* -1: negative; +1: positive; 0: value is
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zero */
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int exp; /* signed exponent; in range E_MIN..E_MAX
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*/
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} flt; /* floating point representation */
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#else
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/* all installers should use this definition */
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#ifndef MANT_SIZE
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#define MANT_SIZE 8
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#endif
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/* MANT_SIZE is the number of mantissa array elements */
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#define Fdig unsigned short
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#define FBITS 16
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/* FBITS is the number of bits in one array element */
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#define E_MIN (-16384)
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#define E_MAX (LONG_MAX/FBASE)
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/* Function status values: */
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# define OKAY 0
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# define EXP2BIG (-1)
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# define SYNTAX (-2)
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# define DIVBY0 (-3)
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/* Rounding types: */
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# define R2ZERO 3
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# define R2PINF 2
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# define R2NINF 1
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# define R2NEAR 0
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typedef struct _flt {
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Fdig mant[MANT_SIZE];
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/* point is between 1st and 2nd digits */
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int sign; /* -1: negative; +1: positive; 0: value is
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zero */
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int exp; /* signed exponent; in range E_MIN..E_MAX
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*/
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} flt; /* floating point representation */
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/* type for result of conversion of reals to ints */
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typedef struct r2l_t {
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int i1; /* least significant */
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int i2;
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int i3;
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int i4; /* most significant */
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} r2l;
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#endif
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typedef struct flt64_t {
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int big; /* more significant 32 bits */
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unsigned int small; /* less significant 32 bits */
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} flt64;
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/* used to convert flpt number which are integers into a
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64 bit representation */
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#endif
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