pyclearsilver::fixedpoint Namespace Reference

Classes
class	FixedPoint
class	object
Functions
def	_mkFP
def	_norm
def	_string2exact
def	_tento
def	_test
def	addHalfAndChop
def	bankersRounding
def	property
Variables
string	__author__ = "Tim Peters"
string	__copyright__ = "Copyright (C) Python Software Foundation"
int	__version__ = 0
tuple	_parser = re.compile(r""" \s* (?P<sign>[-+])? ( (?P<int>\d+) (\. (?P<frac>\d*))? | \. (?P<onlyfrac>\d+) ) ([eE](?P<exp>[-+]? \d+))? \s* $""", re.VERBOSE)
int	DEFAULT_PRECISION = 2

---

Function Documentation

def pyclearsilver.fixedpoint._mkFP	(		n,
			p,
			FixedPoint = FixedPoint
	)		[private]

Make FixedPoint objext - Return a new FixedPoint object with the selected precision.

Definition at line 495 of file fixedpoint.py.

def pyclearsilver.fixedpoint._norm	(		x,
			y,
			isinstance = isinstance,
			FixedPoint = FixedPoint,
			_tento = _tento
	)		[private]

Return xn, yn, p s.t.
       p = max(x.p, y.p)
       x = xn / 10**p
       y = yn / 10**p

    x must be FixedPoint to begin with; if y is not FixedPoint,
    it inherits its precision from x.

    Note that this method is called a lot, so default-arg tricks are helpful.

Definition at line 468 of file fixedpoint.py.

def pyclearsilver.fixedpoint._string2exact

(

s

)

[private]

Return n, p s.t. float string value == n * 10**p exactly.

Definition at line 527 of file fixedpoint.py.

def pyclearsilver.fixedpoint._tento	(		n,
			cache = {}
	)		[private]

Cached computation of 10**n

Definition at line 460 of file fixedpoint.py.

def pyclearsilver.fixedpoint._test

(

)

[private]

Unit testing framework

Definition at line 560 of file fixedpoint.py.

def pyclearsilver.fixedpoint.addHalfAndChop	(		self,
			dividend,
			divisor,
			quotient,
			remainder
	)

the equivalent of 'add half and chop'
increment the quotient if
     the remainder is greater than half of the divisor
  or the remainder is exactly half the divisor and the quotient is >= 0

Definition at line 138 of file fixedpoint.py.

def pyclearsilver.fixedpoint.bankersRounding	(		self,
			dividend,
			divisor,
			quotient,
			remainder
	)

rounding via nearest-even
increment the quotient if
     the remainder is more than half of the divisor
  or the remainder is exactly half the divisor and the quotient is odd

Definition at line 125 of file fixedpoint.py.

def pyclearsilver.fixedpoint.property	(		x,
			y
	)

Definition at line 157 of file fixedpoint.py.

---

Variable Documentation

string pyclearsilver::fixedpoint::__author__ = "Tim Peters"

Definition at line 122 of file fixedpoint.py.

string pyclearsilver::fixedpoint::__copyright__ = "Copyright (C) Python Software Foundation"

Definition at line 121 of file fixedpoint.py.

int pyclearsilver::fixedpoint::__version__ = 0

Definition at line 123 of file fixedpoint.py.

tuple pyclearsilver::fixedpoint::_parser = re.compile(r""" \s* (?P<sign>[-+])? ( (?P<int>\d+) (\. (?P<frac>\d*))? | \. (?P<onlyfrac>\d+) ) ([eE](?P<exp>[-+]? \d+))? \s* $""", re.VERBOSE)

Definition at line 512 of file fixedpoint.py.

int pyclearsilver::fixedpoint::DEFAULT_PRECISION = 2

Definition at line 162 of file fixedpoint.py.