74 lines
1.3 KiB
Go
74 lines
1.3 KiB
Go
/*
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IP type supporting for clickhouse as FixedString(16)
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*/
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package column
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import (
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"database/sql/driver"
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"errors"
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"net"
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)
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var (
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errInvalidScanType = errors.New("Invalid scan types")
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errInvalidScanValue = errors.New("Invalid scan value")
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)
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// IP column type
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type IP net.IP
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// Value implements the driver.Valuer interface, json field interface
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// Alignment on the right side
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func (ip IP) Value() (driver.Value, error) {
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return ip.MarshalBinary()
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}
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func (ip IP) MarshalBinary() ([]byte, error) {
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if len(ip) < 16 {
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var (
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buff = make([]byte, 16)
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j = 0
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)
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for i := 16 - len(ip); i < 16; i++ {
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buff[i] = ip[j]
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j++
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}
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for i := 0; i < 16-len(ip); i++ {
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buff[i] = '\x00'
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}
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if len(ip) == 4 {
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buff[11] = '\xff'
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buff[10] = '\xff'
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}
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return buff, nil
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}
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return []byte(ip), nil
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}
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// Scan implements the driver.Valuer interface, json field interface
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func (ip *IP) Scan(value interface{}) (err error) {
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switch v := value.(type) {
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case []byte:
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if len(v) == 4 || len(v) == 16 {
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*ip = IP(v)
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} else {
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err = errInvalidScanValue
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}
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case string:
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if len(v) == 4 || len(v) == 16 {
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*ip = IP([]byte(v))
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} else {
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err = errInvalidScanValue
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}
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default:
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err = errInvalidScanType
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}
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return
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}
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// String implements the fmt.Stringer interface
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func (ip IP) String() string {
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return net.IP(ip).String()
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}
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