mirror of https://github.com/jetkvm/kvm.git
119 lines
2.8 KiB
Go
119 lines
2.8 KiB
Go
package null
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import (
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"database/sql"
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"strconv"
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"github.com/guregu/null/v6/internal"
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)
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// Int is an nullable int64.
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// It does not consider zero values to be null.
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// It will decode to null, not zero, if null.
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type Int struct {
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sql.NullInt64
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}
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// Int64 is an alias for Int.
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type Int64 = Int
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// NewInt creates a new Int.
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func NewInt(i int64, valid bool) Int {
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return Int{
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NullInt64: sql.NullInt64{
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Int64: i,
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Valid: valid,
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},
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}
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}
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// IntFrom creates a new Int that will always be valid.
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func IntFrom(i int64) Int {
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return NewInt(i, true)
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}
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// IntFromPtr creates a new Int that be null if i is nil.
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func IntFromPtr(i *int64) Int {
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if i == nil {
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return NewInt(0, false)
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}
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return NewInt(*i, true)
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}
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// ValueOrZero returns the inner value if valid, otherwise zero.
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func (i Int) ValueOrZero() int64 {
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if !i.Valid {
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return 0
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}
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return i.Int64
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}
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// ValueOr returns the inner value if valid, otherwise v.
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func (i Int) ValueOr(v int64) int64 {
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if !i.Valid {
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return v
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}
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return i.Int64
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}
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// UnmarshalJSON implements json.Unmarshaler.
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// It supports number, string, and null input.
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// 0 will not be considered a null Int.
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func (i *Int) UnmarshalJSON(data []byte) error {
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return internal.UnmarshalIntJSON(data, &i.Int64, &i.Valid, 64, strconv.ParseInt)
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}
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// UnmarshalText implements encoding.TextUnmarshaler.
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// It will unmarshal to a null Int if the input is blank.
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// It will return an error if the input is not an integer, blank, or "null".
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func (i *Int) UnmarshalText(text []byte) error {
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return internal.UnmarshalIntText(text, &i.Int64, &i.Valid, 64, strconv.ParseInt)
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}
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// MarshalJSON implements json.Marshaler.
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// It will encode null if this Int is null.
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func (i Int) MarshalJSON() ([]byte, error) {
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if !i.Valid {
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return []byte("null"), nil
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}
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return []byte(strconv.FormatInt(i.Int64, 10)), nil
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}
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// MarshalText implements encoding.TextMarshaler.
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// It will encode a blank string if this Int is null.
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func (i Int) MarshalText() ([]byte, error) {
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if !i.Valid {
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return []byte{}, nil
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}
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return []byte(strconv.FormatInt(i.Int64, 10)), nil
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}
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// SetValid changes this Int's value and also sets it to be non-null.
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func (i *Int) SetValid(n int64) {
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i.Int64 = n
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i.Valid = true
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}
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// Ptr returns a pointer to this Int's value, or a nil pointer if this Int is null.
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func (i Int) Ptr() *int64 {
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if !i.Valid {
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return nil
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}
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return &i.Int64
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}
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// IsZero returns true for invalid Ints, for future omitempty support (Go 1.4?)
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// A non-null Int with a 0 value will not be considered zero.
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func (i Int) IsZero() bool {
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return !i.Valid
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}
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// Equal returns true if both ints have the same value or are both null.
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func (i Int) Equal(other Int) bool {
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return i.Valid == other.Valid && (!i.Valid || i.Int64 == other.Int64)
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}
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func (i Int) value() (int64, bool) {
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return i.Int64, i.Valid
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}
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