129 lines
2.6 KiB
Go
129 lines
2.6 KiB
Go
package null
|
|
|
|
import (
|
|
"bytes"
|
|
"database/sql/driver"
|
|
"encoding/json"
|
|
"fmt"
|
|
"math"
|
|
"strconv"
|
|
|
|
"gopkg.in/nullbio/null.v6/convert"
|
|
)
|
|
|
|
// Uint32 is an nullable uint32.
|
|
type Uint32 struct {
|
|
Uint32 uint32
|
|
Valid bool
|
|
}
|
|
|
|
// NewUint32 creates a new Uint32
|
|
func NewUint32(i uint32, valid bool) Uint32 {
|
|
return Uint32{
|
|
Uint32: i,
|
|
Valid: valid,
|
|
}
|
|
}
|
|
|
|
// Uint32From creates a new Uint32 that will always be valid.
|
|
func Uint32From(i uint32) Uint32 {
|
|
return NewUint32(i, true)
|
|
}
|
|
|
|
// Uint32FromPtr creates a new Uint32 that be null if i is nil.
|
|
func Uint32FromPtr(i *uint32) Uint32 {
|
|
if i == nil {
|
|
return NewUint32(0, false)
|
|
}
|
|
return NewUint32(*i, true)
|
|
}
|
|
|
|
// UnmarshalJSON implements json.Unmarshaler.
|
|
func (u *Uint32) UnmarshalJSON(data []byte) error {
|
|
if bytes.Equal(data, NullBytes) {
|
|
u.Valid = false
|
|
u.Uint32 = 0
|
|
return nil
|
|
}
|
|
|
|
var x uint64
|
|
if err := json.Unmarshal(data, &x); err != nil {
|
|
return err
|
|
}
|
|
|
|
if x > math.MaxUint32 {
|
|
return fmt.Errorf("json: %d overflows max uint32 value", x)
|
|
}
|
|
|
|
u.Uint32 = uint32(x)
|
|
u.Valid = true
|
|
return nil
|
|
}
|
|
|
|
// UnmarshalText implements encoding.TextUnmarshaler.
|
|
func (u *Uint32) 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, 32)
|
|
u.Valid = err == nil
|
|
if u.Valid {
|
|
u.Uint32 = uint32(res)
|
|
}
|
|
return err
|
|
}
|
|
|
|
// MarshalJSON implements json.Marshaler.
|
|
func (u Uint32) MarshalJSON() ([]byte, error) {
|
|
if !u.Valid {
|
|
return NullBytes, nil
|
|
}
|
|
return []byte(strconv.FormatUint(uint64(u.Uint32), 10)), nil
|
|
}
|
|
|
|
// MarshalText implements encoding.TextMarshaler.
|
|
func (u Uint32) MarshalText() ([]byte, error) {
|
|
if !u.Valid {
|
|
return []byte{}, nil
|
|
}
|
|
return []byte(strconv.FormatUint(uint64(u.Uint32), 10)), nil
|
|
}
|
|
|
|
// SetValid changes this Uint32's value and also sets it to be non-null.
|
|
func (u *Uint32) SetValid(n uint32) {
|
|
u.Uint32 = n
|
|
u.Valid = true
|
|
}
|
|
|
|
// Ptr returns a pointer to this Uint32's value, or a nil pointer if this Uint32 is null.
|
|
func (u Uint32) Ptr() *uint32 {
|
|
if !u.Valid {
|
|
return nil
|
|
}
|
|
return &u.Uint32
|
|
}
|
|
|
|
// IsZero returns true for invalid Uint32's, for future omitempty support (Go 1.4?)
|
|
func (u Uint32) IsZero() bool {
|
|
return !u.Valid
|
|
}
|
|
|
|
// Scan implements the Scanner interface.
|
|
func (u *Uint32) Scan(value interface{}) error {
|
|
if value == nil {
|
|
u.Uint32, u.Valid = 0, false
|
|
return nil
|
|
}
|
|
u.Valid = true
|
|
return convert.ConvertAssign(&u.Uint32, value)
|
|
}
|
|
|
|
// Value implements the driver Valuer interface.
|
|
func (u Uint32) Value() (driver.Value, error) {
|
|
if !u.Valid {
|
|
return nil, nil
|
|
}
|
|
return uint64(u.Uint32), nil
|
|
}
|