Add db-connect, a SQL over HTTPS server

vendor/github.com/kshvakov/clickhouse/lib/cityhash102/city64.go

@@ -0,0 +1,45 @@
+package cityhash102
+
+import (
+	"encoding/binary"
+	"hash"
+)
+
+type City64 struct {
+	s []byte
+}
+
+var _ hash.Hash64 = (*City64)(nil)
+var _ hash.Hash = (*City64)(nil)
+
+func New64() hash.Hash64 {
+	return &City64{}
+}
+
+func (this *City64) Sum(b []byte) []byte {
+	b2 := make([]byte, 8)
+	binary.BigEndian.PutUint64(b2, this.Sum64())
+	b = append(b, b2...)
+	return b
+}
+
+func (this *City64) Sum64() uint64 {
+	return CityHash64(this.s, uint32(len(this.s)))
+}
+
+func (this *City64) Reset() {
+	this.s = this.s[0:0]
+}
+
+func (this *City64) BlockSize() int {
+	return 1
+}
+
+func (this *City64) Write(s []byte) (n int, err error) {
+	this.s = append(this.s, s...)
+	return len(s), nil
+}
+
+func (this *City64) Size() int {
+	return 8
+}