real
Section: OATH Reference Manual (3O)
Updated: 26 August 1991
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NAME
real (realA, realG) - an object that holds a real number value
SYNOPSIS
#include <oath/numeric.h>
DESCRIPTION
The real is an object that holds a real numeric value. Note that real
and the other numeric types in OATH are object-oriented like bag, as
opposed to value-oriented like int or float -- see complex(3O).
DERIVATION
real : complex : obj
real is an abstract type.
STATIC OPERATIONS
- realA realA:: isa (objA)
-
realA::isa(O) returns O if it is truly a real; otherwise it returns Nil.
MEMBER OPERATIONS
- integerA realA:: makeFloor (int = FALSE)
-
R.makeFloor() makes and returns an integer representing the closest integer
value that is less than or equal to R (rounds toward negative infinity).
- integerA realA:: makeCeiling (int = FALSE)
-
R.makeCeiling() makes and returns an integer representing the closest integer
value that is greater than or equal to R (rounds toward positive infinity).
- integerA realA:: makeTruncate (int = FALSE)
-
R.makeTruncate() makes and returns an integer representing the closest integer
value to R whose absolute value is less than the absolute value of R (rounds
toward zero).
- integerA realA:: makeRound (int = FALSE)
-
R.makeRound() makes and returns an integer representing the closest integer
value to R. In case of exact tie in closeness, the larger integer is chosen.
- int realA:: sign ()
-
R.sign() returns -1 if R is less than zero, 0 if R isZero, or 1 if R is greater
than 0.
- int realA:: hasPositive ()
-
R.hasPositive() returns TRUE if R has a value greater than 0.
- int realA:: hasNegative ()
-
R.hasNegative() returns TRUE if R has a value less than 0.
- int realA:: operator <= (realA)
-
C1 <= C2 returns TRUE if C1 is less than or equal to C2.
- int realA:: operator < (realA)
-
C1 < C2 returns TRUE if C1 is less than C2.
- int realA:: operator > (realA)
-
C1 > C2 returns TRUE if C1 is greater than C2.
- int realA:: operator >= (realA)
-
C1 >= C2 returns TRUE if C1 is greater than or equal to C2.
- int realA:: hasDouble ()
-
R.isDouble() returns TRUE if R is within the range of double.
- double realA:: makeDouble ()
-
R.makeDouble() returns the nearest double value to R.
- realA realA:: min (realA)
-
R1.min(R2) sets R1 to the value of R2 if R2 was less than R1.
- realA realA:: max (realA)
-
R1.max(R2) sets R1 to the value of R2 if R2 was more than R1.
INTERNAL OPERATIONS
- const signMagnitudeP& realA:: smMantissa ()
-
R.smMantissa() returns an extended-precision, sign-magnitude representation
of the mantissa of the value of R.
- const signMagnitudeP& realA:: smExponent ()
-
R.smExponent() returns an extended-precision, sign-magnitude representation
of the power-of-2 exponent of the value of R. That is, it returns the number
of bits that the mantissa, taken as an integer value, must be shifted left or
right (left is positive, right negative) to obtain the real value.
SEE ALSO
OATH(3O), complex(3O), rational(3O), integer(3O), bigInteger(3O)
AUTHOR
Brian M. Kennedy (Computer Science Center, Texas Instruments Incorporated)
COPYRIGHT
Copyright (C) 1991 Texas Instruments Incorporated
Permission is granted to any individual or institution
to use, copy, modify, and distribute this software,
provided that this complete copyright and permission notice
is maintained, intact, in all copies and supporting documentation.
Texas Instruments Incorporated provides this software "as is"
without express or implied warranty.
BUGS
There is only one implementation of real provided, and it only supports
integer precision. Thus, all the difficulties in
implementing cross-implementations of functionality may not be
readily apparent. Thus, this interface may need augmentation to better
support implementations.
Planned implementations include doubleReal, floatReal, bigReal,
bigRational, dlongRational, longRational, bigInteger, dlongInteger,
and longInteger.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- DERIVATION
-
- STATIC OPERATIONS
-
- MEMBER OPERATIONS
-
- INTERNAL OPERATIONS
-
- SEE ALSO
-
- AUTHOR
-
- COPYRIGHT
-
- BUGS
-
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