STOR-519: Add db-connect, a SQL over HTTPS server

vendor/github.com/kshvakov/clickhouse/lib/column/ipv4.go

@@ -0,0 +1,34 @@
+package column
+
+import (
+	"net"
+
+	"github.com/kshvakov/clickhouse/lib/binary"
+)
+
+type IPv4 struct {
+	base
+}
+
+func (*IPv4) Read(decoder *binary.Decoder) (interface{}, error) {
+	v, err := decoder.Fixed(4)
+	if err != nil {
+		return nil, err
+	}
+	return net.IPv4(v[3], v[2], v[1], v[0]), nil
+}
+
+func (ip *IPv4) Write(encoder *binary.Encoder, v interface{}) error {
+	netIP, ok := v.(net.IP)
+	if !ok {
+		return &ErrUnexpectedType{
+			T:      v,
+			Column: ip,
+		}
+	}
+	ip4 := netIP.To4()
+	if _, err := encoder.Write([]byte{ip4[3], ip4[2], ip4[1], ip4[0]}); err != nil {
+		return err
+	}
+	return nil
+}