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uint64.go
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uint64.go
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package null
import (
"bytes"
"database/sql/driver"
"encoding/json"
"strconv"
"gopkg.in/volatiletech/null.v6/convert"
)
// Uint64 is an nullable uint64.
type Uint64 struct {
Uint64 uint64
Valid bool
}
// NewUint64 creates a new Uint64
func NewUint64(i uint64, valid bool) Uint64 {
return Uint64{
Uint64: i,
Valid: valid,
}
}
// Uint64From creates a new Uint64 that will always be valid.
func Uint64From(i uint64) Uint64 {
return NewUint64(i, true)
}
// Uint64FromPtr creates a new Uint64 that be null if i is nil.
func Uint64FromPtr(i *uint64) Uint64 {
if i == nil {
return NewUint64(0, false)
}
return NewUint64(*i, true)
}
// UnmarshalJSON implements json.Unmarshaler.
func (u *Uint64) UnmarshalJSON(data []byte) error {
if bytes.Equal(data, NullBytes) {
u.Uint64 = 0
u.Valid = false
return nil
}
if err := json.Unmarshal(data, &u.Uint64); err != nil {
return err
}
u.Valid = true
return nil
}
// UnmarshalText implements encoding.TextUnmarshaler.
func (u *Uint64) UnmarshalText(text []byte) error {
if text == nil || len(text) == 0 {
u.Valid = false
return nil
}
var err error
res, err := strconv.ParseUint(string(text), 10, 64)
u.Valid = err == nil
if u.Valid {
u.Uint64 = uint64(res)
}
return err
}
// MarshalJSON implements json.Marshaler.
func (u Uint64) MarshalJSON() ([]byte, error) {
if !u.Valid {
return NullBytes, nil
}
return []byte(strconv.FormatUint(u.Uint64, 10)), nil
}
// MarshalText implements encoding.TextMarshaler.
func (u Uint64) MarshalText() ([]byte, error) {
if !u.Valid {
return []byte{}, nil
}
return []byte(strconv.FormatUint(u.Uint64, 10)), nil
}
// SetValid changes this Uint64's value and also sets it to be non-null.
func (u *Uint64) SetValid(n uint64) {
u.Uint64 = n
u.Valid = true
}
// Ptr returns a pointer to this Uint64's value, or a nil pointer if this Uint64 is null.
func (u Uint64) Ptr() *uint64 {
if !u.Valid {
return nil
}
return &u.Uint64
}
// IsZero returns true for invalid Uint64's, for future omitempty support (Go 1.4?)
func (u Uint64) IsZero() bool {
return !u.Valid
}
// Scan implements the Scanner interface.
func (u *Uint64) Scan(value interface{}) error {
if value == nil {
u.Uint64, u.Valid = 0, false
return nil
}
u.Valid = true
return convert.ConvertAssign(&u.Uint64, value)
}
// Value implements the driver Valuer interface.
func (u Uint64) Value() (driver.Value, error) {
if !u.Valid {
return nil, nil
}
return int64(u.Uint64), nil
}