decimal

Documentation

Index

• type Decimal1
  • func New1(Dec string) (dec Decimal1, err error)
  • func (d *Decimal1) Add(v Decimal1) Decimal1
  • func (d *Decimal1) Dec() string
  • func (d *Decimal1) DecInt() uint64
  • func (d *Decimal1) Multi(v Decimal1)
  • func (d *Decimal1) SetDec(dec string) error
  • func (d *Decimal1) SetDecInt(dec uint64) error
  • func (d Decimal1) String() string
• type Decimal11
  • func New11(Dec string, eff int) (dec *Decimal11, err error)
  • func (x *Decimal11) Add(v *Decimal11) *Decimal11
  • func (x *Decimal11) String() string
• type Decimal2
• type Decimal3
  • func New3(mant uint64, exp int, neg bool) *Decimal3
  • func New3FromStr(str string) (Decimal3, error)
  • func (x *Decimal3) Add(v Decimal3) *Decimal3
  • func (x *Decimal3) Compose(form byte, negative bool, mant []byte, exponent int32) error
  • func (x *Decimal3) Decompose(buf []byte) (form byte, negative bool, mant []byte, exponent int32)
  • func (x *Decimal3) Div(v Decimal3, mode RoundingMode) *Decimal3
  • func (x *Decimal3) DivInt(v int, mode RoundingMode) *Decimal3
  • func (x *Decimal3) Float() float64
  • func (x *Decimal3) Mul(v Decimal3) *Decimal3
  • func (x *Decimal3) Scan(raw interface{}) error
  • func (x Decimal3) String() string
  • func (x *Decimal3) Sub(v Decimal3) *Decimal3
  • func (x Decimal3) Value() (driver.Value, error)
• type RoundingMode

Types

type Decimal1

type Decimal1 struct {
	Int uint64
	// contains filtered or unexported fields
}

放弃，省空间，但计算时间浪费，来回不停转字符串

func New1

func New1(Dec string) (dec Decimal1, err error)

func (*Decimal1) Add

func (d *Decimal1) Add(v Decimal1) Decimal1

func (*Decimal1) Dec

func (d *Decimal1) Dec() string

func (*Decimal1) DecInt

func (d *Decimal1) DecInt() uint64

func (*Decimal1) Multi

func (d *Decimal1) Multi(v Decimal1)

func (*Decimal1) SetDec

func (d *Decimal1) SetDec(dec string) error

func (*Decimal1) SetDecInt

func (d *Decimal1) SetDecInt(dec uint64) error

func (Decimal1) String

func (d Decimal1) String() string

type Decimal11

type Decimal11 struct {
	Int uint64
	// contains filtered or unexported fields
}

func New11

func New11(Dec string, eff int) (dec *Decimal11, err error)

func (*Decimal11) Add

func (x *Decimal11) Add(v *Decimal11) *Decimal11

func (*Decimal11) String

func (x *Decimal11) String() string

type Decimal2

type Decimal2 string

example:"123456789.987654321"

type Decimal3

type Decimal3 struct {
	// contains filtered or unexported fields
}

func New3

func New3(mant uint64, exp int, neg bool) *Decimal3

func New3FromStr

func New3FromStr(str string) (Decimal3, error)

func (*Decimal3) Add

func (x *Decimal3) Add(v Decimal3) *Decimal3

func (*Decimal3) Compose

func (x *Decimal3) Compose(form byte, negative bool, mant []byte, exponent int32) error

func (*Decimal3) Decompose

func (x *Decimal3) Decompose(buf []byte) (form byte, negative bool, mant []byte, exponent int32)

func (*Decimal3) Div

func (x *Decimal3) Div(v Decimal3, mode RoundingMode) *Decimal3

func (*Decimal3) DivInt

func (x *Decimal3) DivInt(v int, mode RoundingMode) *Decimal3

func (*Decimal3) Float

func (x *Decimal3) Float() float64

func (*Decimal3) Mul

func (x *Decimal3) Mul(v Decimal3) *Decimal3

func (*Decimal3) Scan

func (x *Decimal3) Scan(raw interface{}) error

func (Decimal3) String

func (x Decimal3) String() string

func (x *Decimal3) Div2(v Decimal3) *Decimal3 {
	f1:=big.NewFloat(x.Float())
	f2:=big.NewFloat(v.Float())
	f3,_:=f1.Quo(f1,f2).Float64()
}

func (*Decimal3) Sub

func (x *Decimal3) Sub(v Decimal3) *Decimal3

func (Decimal3) Value

func (x Decimal3) Value() (driver.Value, error)

type RoundingMode

type RoundingMode uint8

const (
	UP RoundingMode = iota
	DOWN
	HALFUP
)