decimal

README

Golang Decimal Package

Golang Decimal Package providers a decimal type for multi-precision arithmetic.

Usage

• create a decimal by float64:

    dec := decimal.New(5.18)
  

• create a decimal by string:

    dec, err := decimal.Parse("5.18181818181818181818181818181818181818")
  

COPYRIGHT & LICENSE

Copyright 2014 Landjur, Inc. Code released under the Apache License, Version 2.0.

Documentation

Overview

Package decimal providers a Decimal type for multi-precision arithmetic.

Index

• type Decimal
  • func New(number float64) *Decimal
  • func Parse(numberString string) (*Decimal, error)
  • func (this *Decimal) Add(another *Decimal) *Decimal
  • func (this *Decimal) Cmp(another *Decimal) int
  • func (this Decimal) Float64() float64
  • func (this Decimal) FloatString(precision int) string
  • func (this *Decimal) Mul(another *Decimal) *Decimal
  • func (this Decimal) Sign() int
  • func (this Decimal) String() string
  • func (this *Decimal) Sub(another *Decimal) *Decimal

Types

type Decimal

type Decimal struct {
	// contains filtered or unexported fields
}

Decimal represents a decimal which can handing fixed precision.

func New

func New(number float64) *Decimal

New returns a new instance of Decimal.

func Parse

func Parse(numberString string) (*Decimal, error)

Parse returns a new instance of Decimal by parse decimal string.

func (*Decimal) Add

func (this *Decimal) Add(another *Decimal) *Decimal

Add sets this to the sum of this and another and returns this.

func (*Decimal) Cmp

func (this *Decimal) Cmp(another *Decimal) int

Cmp compares this and another and returns: -1 if this < another

0 if this == another

+1 if this > another

func (Decimal) Float64

func (this Decimal) Float64() float64

Float64 returns the nearest float64 value of decimal.

func (Decimal) FloatString

func (this Decimal) FloatString(precision int) string

FloatString returns a string representation of decimal form with precision digits of precision after the decimal point and the last digit rounded.

func (*Decimal) Mul

func (this *Decimal) Mul(another *Decimal) *Decimal

Mul sets this to the product this*another and returns this.

func (Decimal) Sign

func (this Decimal) Sign() int

Sign returns: -1: if this < 0

0: if this == 0

+1: if this > 0

func (Decimal) String

func (this Decimal) String() string

String returns the string of Decimal.

func (*Decimal) Sub

func (this *Decimal) Sub(another *Decimal) *Decimal

Sub sets this to the difference this-another and returns this.