gdecimal

package
v0.0.0-...-f3abbe6 Latest Latest
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 Go to latest Published: Sep 27, 2020 License: MIT Imports: 9 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	Zero = Decimal(decimal.Zero)
	One  = NewFromInt(1)
	N0   = Decimal(decimal.Zero)
	N1   = NewFromInt(1)
)

Functions

func MaxPrec 

func MaxPrec(in []Decimal) int

func ToElegantFloat64s 

func ToElegantFloat64s(in []Decimal) []gnum.ElegantFloat

func ToFloat64s 

func ToFloat64s(in []Decimal) []float64

Types

type Decimal 

type Decimal decimal.Decimal

func Max 

func Max(first Decimal, args ...Decimal) Decimal

func Min 

func Min(first Decimal, args ...Decimal) Decimal

func NewFromDecimal 

func NewFromDecimal(d2 decimal.Decimal) Decimal

func NewFromFloat64 

func NewFromFloat64(val float64) Decimal

func NewFromInt 

func NewFromInt(val int) Decimal

func NewFromInt64 

func NewFromInt64(val int64) Decimal

func NewFromString 

func NewFromString(val string) (Decimal, error)

func NewFromStringEx 

func NewFromStringEx(val string, prec int) (Decimal, error)

func NewFromUint 

func NewFromUint(val uint) Decimal

func NewFromUint64 

func NewFromUint64(val uint64) Decimal

func (Decimal) Abs 

func (d Decimal) Abs() Decimal

func (Decimal) Add 

func (d Decimal) Add(d2 Decimal) Decimal

func (Decimal) AddFloat64 

func (d Decimal) AddFloat64(n float64) Decimal

func (Decimal) AddInt 

func (d Decimal) AddInt(n int) Decimal

func (Decimal) BitsAfterDecimalPoint 

func (d Decimal) BitsAfterDecimalPoint() int

func (Decimal) Div 

func (d Decimal) Div(d2 Decimal) Decimal

func (Decimal) DivFloat64 

func (d Decimal) DivFloat64(n float64) Decimal

func (Decimal) DivInt 

func (d Decimal) DivInt(n int) Decimal

func (Decimal) DivRound 

func (d Decimal) DivRound(d2 Decimal, precision int) Decimal

FIXME： 这个是RoundUp还是RoundDown？

func (Decimal) DivRoundDown 

func (d Decimal) DivRoundDown(d2 Decimal, precision int) Decimal

func (Decimal) DivRoundFloat64 

func (d Decimal) DivRoundFloat64(d2 float64, precision int) Decimal

func (Decimal) DivRoundInt 

func (d Decimal) DivRoundInt(d2 int, precision int) Decimal

func (Decimal) Equal 

func (d Decimal) Equal(cmp Decimal) bool

func (Decimal) EqualFloat64 

func (d Decimal) EqualFloat64(cmp float64) bool

func (Decimal) EqualInt 

func (d Decimal) EqualInt(cmp int) bool

func (Decimal) Float64 

func (d Decimal) Float64() float64

func (Decimal) Float64Ex 

func (d Decimal) Float64Ex() (val float64, exact bool)

func (Decimal) GreaterThan 

func (d Decimal) GreaterThan(cmp Decimal) bool

func (Decimal) GreaterThanFloat64 

func (d Decimal) GreaterThanFloat64(cmp float64) bool

func (Decimal) GreaterThanInt 

func (d Decimal) GreaterThanInt(cmp int) bool

func (Decimal) GreaterThanOrEqual 

func (d Decimal) GreaterThanOrEqual(cmp Decimal) bool

func (Decimal) GreaterThanOrEqualFloat64 

func (d Decimal) GreaterThanOrEqualFloat64(cmp float64) bool

func (Decimal) GreaterThanOrEqualInt 

func (d Decimal) GreaterThanOrEqualInt(cmp int) bool

func (Decimal) Int64Part 

func (d Decimal) Int64Part() int64

func (Decimal) IntPart 

func (d Decimal) IntPart() int

func (Decimal) IsNegative 

func (d Decimal) IsNegative() bool

func (Decimal) IsPositive 

func (d Decimal) IsPositive() bool

func (Decimal) IsZero 

func (d Decimal) IsZero() bool

func (Decimal) LessThan 

func (d Decimal) LessThan(cmp Decimal) bool

func (Decimal) LessThanFloat64 

func (d Decimal) LessThanFloat64(cmp float64) bool

func (Decimal) LessThanInt 

func (d Decimal) LessThanInt(cmp int) bool

func (Decimal) LessThanOrEqual 

func (d Decimal) LessThanOrEqual(cmp Decimal) bool

func (Decimal) LessThanOrEqualFloat64 

func (d Decimal) LessThanOrEqualFloat64(cmp float64) bool

func (Decimal) LessThanOrEqualInt 

func (d Decimal) LessThanOrEqualInt(cmp int) bool

func (Decimal) MarshalBSONValue 

func (d Decimal) MarshalBSONValue() (bsontype.Type, []byte, error)

in BSON, Decimal128 could has 34 numbers after decimal point, it will loss precision if more than 34 numbers after decimal point so we serialize Decimal into string, just like in JSON. in BSON, omitempty of Decimal works reference: https://github.com/hackeryard/configcenter/blob/a9638f554b4cf47fb13c37c5c3611e1e0696fd25/src/common/metadata/time.go#L94

func (Decimal) MarshalBinary 

func (d Decimal) MarshalBinary() (data []byte, err error)

func (Decimal) MarshalJSON 

func (d Decimal) MarshalJSON() ([]byte, error)

NOTE: if omitempty required in JSON, use *Decimal in your structure, no other way to implement this even you change source code MarshalJSON function in shopsprint/decimal

func (Decimal) MarshalJSONWithoutQuotes 

func (d Decimal) MarshalJSONWithoutQuotes() ([]byte, error)

WARNING: this is dangerous for decimals with many digits, since many JSON unmarshallers (ex: Javascript's) will unmarshal JSON numbers to IEEE 754 double-precision floating point numbers, which means you can potentially silently lose precision.

func (Decimal) MarshalText 

func (d Decimal) MarshalText() (text []byte, err error)

func (Decimal) Mul 

func (d Decimal) Mul(d2 Decimal) Decimal

func (Decimal) MulFloat64 

func (d Decimal) MulFloat64(n float64) Decimal

func (Decimal) MulInt 

func (d Decimal) MulInt(n int) Decimal

func (*Decimal) SetFloat64 

func (d *Decimal) SetFloat64(val float64)

func (*Decimal) SetInt 

func (d *Decimal) SetInt(val int)

func (Decimal) String 

func (d Decimal) String() string

func (Decimal) Sub 

func (d Decimal) Sub(d2 Decimal) Decimal

func (Decimal) SubFloat64 

func (d Decimal) SubFloat64(n float64) Decimal

func (Decimal) SubInt 

func (d Decimal) SubInt(n int) Decimal

func (*Decimal) ToBSONDecimal128 

func (d *Decimal) ToBSONDecimal128() (primitive.Decimal128, error)

WARN: BSON Decimal128 has max 34 number after "." but Decimal doesn't have this limit (limited by your memory)

func (*Decimal) ToElegantFloat 

func (d *Decimal) ToElegantFloat() gnum.ElegantFloat

func (Decimal) Trunc 

func (d Decimal) Trunc(prec int, step float64) Decimal

prec就是小数点后最多支持多少位

func (Decimal) Trunc2 

func (d Decimal) Trunc2(min Decimal, step float64) Decimal

min 就是小数点后最多多少位的小数写法，比如，min=0.00001，prec就是5

func (Decimal) TurnPositiveNegative 

func (d Decimal) TurnPositiveNegative() Decimal

func (*Decimal) UnmarshalBSONValue 

func (d *Decimal) UnmarshalBSONValue(t bsontype.Type, data []byte) error

func (*Decimal) UnmarshalBinary 

func (d *Decimal) UnmarshalBinary(b []byte) error

func (*Decimal) UnmarshalJSON 

func (d *Decimal) UnmarshalJSON(b []byte) error

func (*Decimal) UnmarshalText 

func (d *Decimal) UnmarshalText(text []byte) error

func (Decimal) WithPrec 

func (d Decimal) WithPrec(prec int) Decimal

Source Files

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