xreal.h File Reference

Definitions relating to the extended-precision xreal class. More...

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Classes
class	xreal
Defines
#define	TWO64   (18446744073709551616.0)
	xreal: Extended-precision "real" class.
#define	TWO63   ( 9223372036854775808.0)
#define	TWO64I   (5.42101086242752217e-20)
#define	TWO63M   ( 9223372036854775807)
#define	TWO63N   (-9223372036854775808)
Typedefs
typedef long long	xint_t
typedef unsigned long long	xfrac_t
Functions
ostream &	operator<< (ostream &s, xreal x)
istream &	operator>> (istream &s, xreal &x)
bool	operator== (xreal x, real y)
bool	operator!= (xreal x, real y)
bool	operator< (xreal x, real y)
bool	operator> (xreal x, real y)
bool	operator<= (xreal x, real y)
bool	operator>= (xreal x, real y)
void	put_real_number (ostream &s, char *label, xreal x)

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Detailed Description

Definitions relating to the extended-precision xreal class.

Definition in file xreal.h.

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Define Documentation

#define TWO64   (18446744073709551616.0)

xreal: Extended-precision "real" class. Currently implemented in fixed precision as x = i + 2^{-64} f, where the "integer" i is a long long (range 2^63 - 1 to -2^63), and the "fraction" f is an unsigned long long (range 0 to 2^64 - 1), giving roughly 20 digits before and after the decimal point. Note that long long may not be universally acceptable. Could rewrite to use standard long ints if necessary. Definition at line 37 of file xreal.h.

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