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mvals.h

/****************** Start of $RCSfile: mvals.h,v $  ****************
*
* $Source: /home/alb/afbackup/afbackup-3.3.8beta7/RCS/mvals.h,v $
* $Id: mvals.h,v 1.3 2004/07/08 20:34:45 alb Exp alb $
* $Date: 2004/07/08 20:34:45 $
* $Author: alb $
*
*
******* description ***********************************************
*
*
*
*******************************************************************/



#ifndef     _MVALS_H
#define     _MVALS_H

#include <lconf.h>

#if !defined(__WATCOMC__) && !defined(__QNX__) && !defined(__MSDOS__) && !defined(__WIN32__) && !defined(_MSC_VER)
# ifdef INC_LIMITS_H
#  include <limits.h>
#  if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__)
#   ifdef INT_MAX
#    ifndef MAXINT
#     define MAXINT     INT_MAX
#    endif
#   endif
#  endif
# endif
# ifdef     INC_VALUES_H
#  include <values.h>
# endif
#else

#pragma ident     "@(#)values.h     1.9   93/02/04 SMI"     /* SVr4.0 1.33    */

#ifdef      __cplusplus
extern "C" {
#endif

/* These values work with any binary representation of integers
 * where the high-order bit contains the sign. */

/* a number used normally for size of a shift */
#define     BITSPERBYTE 8

#define     BITS(type)  (BITSPERBYTE * (int)sizeof (type))

/* short, regular and long ints with only the high-order bit turned on */
#define     HIBITS      ((short)(1 << BITS(short) - 1))

#if defined(__STDC__)

#define     HIBITI      (1U << BITS(int) - 1)
#define     HIBITL      (1UL << BITS(long) - 1)

#else

#define     HIBITI      ((unsigned)1 << BITS(int) - 1)
#define     HIBITL      (1L << BITS(long) - 1)

#endif

/* largest short, regular and long int */
#define     MAXSHORT    ((short)~HIBITS)
#define     MAXINT      ((int)(~HIBITI))
#define     MAXLONG     ((long)(~HIBITL))

/* various values that describe the binary floating-point representation
 * _EXPBASE - the exponent base
 * DMAXEXP  - the maximum exponent of a double (as returned by frexp())
 * FMAXEXP  - the maximum exponent of a float  (as returned by frexp())
 * DMINEXP  - the minimum exponent of a double (as returned by frexp())
 * FMINEXP  - the minimum exponent of a float  (as returned by frexp())
 * MAXDOUBLE      - the largest double
 *                ((_EXPBASE ** DMAXEXP) * (1 - (_EXPBASE ** -DSIGNIF)))
 * MAXFLOAT - the largest float
 *                ((_EXPBASE ** FMAXEXP) * (1 - (_EXPBASE ** -FSIGNIF)))
 * MINDOUBLE      - the smallest double (_EXPBASE ** (DMINEXP - 1))
 * MINFLOAT - the smallest float (_EXPBASE ** (FMINEXP - 1))
 * DSIGNIF  - the number of significant bits in a double
 * FSIGNIF  - the number of significant bits in a float
 * DMAXPOWTWO     - the largest power of two exactly representable as a double
 * FMAXPOWTWO     - the largest power of two exactly representable as a float
 * _IEEE    - 1 if IEEE standard representation is used
 * _DEXPLEN - the number of bits for the exponent of a double
 * _FEXPLEN - the number of bits for the exponent of a float
 * _HIDDENBIT     - 1 if high-significance bit of mantissa is implicit
 * LN_MAXDOUBLE   - the natural log of the largest double  -- log(MAXDOUBLE)
 * LN_MINDOUBLE   - the natural log of the smallest double -- log(MINDOUBLE)
 * LN_MAXFLOAT    - the natural log of the largest float  -- log(MAXFLOAT)
 * LN_MINFLOAT    - the natural log of the smallest float -- log(MINFLOAT)
 */

#include <float.h>

#if defined(__STDC__)

#define     MAXDOUBLE   DBL_MAX
#define     MAXFLOAT    ((float)FLT_MAX)
#define     MINDOUBLE   DBL_MIN
#define     MINFLOAT    ((float)FLT_MIN)
#define     _IEEE       1
#define     _DEXPLEN    11
#define     _HIDDENBIT  1
#define     DMINEXP           DBL_MIN_EXP
#define     FMINEXP           FLT_MIN_EXP

#else

#define     MAXDOUBLE   DBL_MAX
#define     MAXFLOAT    ((float)FLT_MAX)
#define     MINDOUBLE   DBL_MIN
#define     MINFLOAT    ((float)FLT_MIN)
#define     _IEEE       1
#define     _DEXPLEN    11
#define     _HIDDENBIT  1
#define     DMINEXP           DBL_MIN_EXP
#define     FMINEXP           FLT_MIN_EXP

#endif      /* __STDC__ */

#define     _EXPBASE    (1 << _LENBASE)
#define     _FEXPLEN    8
#define     DSIGNIF     (BITS(double) - _DEXPLEN + _HIDDENBIT - 1)
#define     FSIGNIF     (BITS(float)  - _FEXPLEN + _HIDDENBIT - 1)
#define     DMAXPOWTWO  ((double)(1L << BITS(long) - 2) * \
                        (1L << DSIGNIF - BITS(long) + 1))
#define     FMAXPOWTWO  ((float)(1L << FSIGNIF - 1))
#define     DMAXEXP     ((1 << _DEXPLEN - 1) - 1 + _IEEE)
#define     FMAXEXP     ((1 << _FEXPLEN - 1) - 1 + _IEEE)
#define     LN_MAXDOUBLE      (M_LN2 * DMAXEXP)
#define     LN_MAXFLOAT (float)(M_LN2 * FMAXEXP)
#define     LN_MINDOUBLE      (M_LN2 * (DMINEXP - 1))
#define     LN_MINFLOAT (float)(M_LN2 * (FMINEXP - 1))
#define     H_PREC      (DSIGNIF % 2 ? (1L << DSIGNIF/2) * M_SQRT2 : 1L << DSIGNIF/2)
#define     FH_PREC \
      (float)(FSIGNIF % 2 ? (1L << FSIGNIF/2) * M_SQRT2 : 1L << FSIGNIF/2)
#define     X_EPS (1.0/H_PREC)
#define     FX_EPS      (float)((float)1.0/FH_PREC)
#define     X_PLOSS     ((double)(long)(M_PI * H_PREC))
#define     FX_PLOSS ((float)(long)(M_PI * FH_PREC))
#define     X_TLOSS     (M_PI * DMAXPOWTWO)
#define     FX_TLOSS (float)(M_PI * FMAXPOWTWO)
#define     M_LN2 0.69314718055994530942
#define     M_PI  3.14159265358979323846
#define     M_SQRT2     1.41421356237309504880
#define     MAXBEXP     DMAXEXP /* for backward compatibility */
#define     MINBEXP     DMINEXP /* for backward compatibility */
#define     MAXPOWTWO   DMAXPOWTWO /* for backward compatibility */

#ifdef      __cplusplus
}
#endif

#endif      /* !defined(__WATCOMC__) && !defined(__QNX__) */

#define     ONE_MEGA    1048576

#define     MAXReal64   MAXDOUBLE
#define     MAXReal32   MAXFLOAT
#define     MINReal64   MINDOUBLE
#define     MINReal32   MINFLOAT

#endif      /* _MVALS_H */

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