62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
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package types
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import (
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"database/sql/driver"
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"encoding/json"
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"errors"
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)
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// Byte is an alias for byte.
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// Byte implements Marshal and Unmarshal.
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type Byte byte
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// String output your byte.
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func (b Byte) String() string {
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return string(b)
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}
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// UnmarshalJSON sets *b to a copy of data.
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func (b *Byte) UnmarshalJSON(data []byte) error {
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if b == nil {
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return errors.New("json: unmarshal json on nil pointer to byte")
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}
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var x string
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if err := json.Unmarshal(data, &x); err != nil {
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return err
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}
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if len(x) > 1 {
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return errors.New("json: cannot convert to byte, text len is greater than one")
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}
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*b = Byte(x[0])
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return nil
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}
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// MarshalJSON returns the JSON encoding of b.
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func (b Byte) MarshalJSON() ([]byte, error) {
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return []byte{'"', byte(b), '"'}, nil
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}
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// Value returns b as a driver.Value.
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func (b Byte) Value() (driver.Value, error) {
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return []byte{byte(b)}, nil
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}
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// Scan stores the src in *b.
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func (b *Byte) Scan(src interface{}) error {
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switch src.(type) {
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case uint8:
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*b = Byte(src.(uint8))
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case string:
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*b = Byte(src.(string)[0])
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case []byte:
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*b = Byte(src.([]byte)[0])
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default:
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return errors.New("incompatible type for byte")
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}
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return nil
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}
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