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app/interface/main/creative/model/reply/xints.go

@@ -0,0 +1,91 @@
+package reply
+
+import (
+	"database/sql/driver"
+	"encoding/binary"
+)
+
+//Ints be used to MySql\Protobuf varbinary converting.
+type Ints []int64
+
+// MarshalTo  marshal int64 slice to bytes,each int64 will occupy Fixed 8 bytes.
+//if the argument data not supplied with the full size,it will return the actual written size
+func (is Ints) MarshalTo(data []byte) (int, error) {
+	for i, n := range is {
+		start := i * 8
+		end := (i + 1) * 8
+
+		if len(data) < end {
+			return start, nil
+		}
+		bs := data[start:end]
+		binary.BigEndian.PutUint64(bs, uint64(n))
+	}
+
+	return 8 * len(is), nil
+}
+
+// Size return the total size it will occupy in bytes
+func (is Ints) Size() int {
+	return len(is) * 8
+}
+
+// Unmarshal parse the data into int64 slice
+func (is *Ints) Unmarshal(data []byte) error {
+	return is.Scan(data)
+}
+
+// Scan parse the data into int64 slice
+func (is *Ints) Scan(src interface{}) (err error) {
+	switch sc := src.(type) {
+	case []byte:
+		var res []int64
+		for i := 0; i < len(sc) && i+8 <= len(sc); i += 8 {
+			ui := binary.BigEndian.Uint64(sc[i : i+8])
+			res = append(res, int64(ui))
+		}
+		*is = res
+	}
+	return
+}
+
+// Value marshal int64 slice to driver.Value,each int64 will occupy Fixed 8 bytes
+func (is Ints) Value() (driver.Value, error) {
+	return is.Bytes(), nil
+}
+
+// Bytes marshal int64 slice to bytes,each int64 will occupy Fixed 8 bytes
+func (is Ints) Bytes() []byte {
+	res := make([]byte, 0, 8*len(is))
+	for _, i := range is {
+		bs := make([]byte, 8)
+		binary.BigEndian.PutUint64(bs, uint64(i))
+		res = append(res, bs...)
+	}
+	return res
+}
+
+// Evict get rid of the sepcified num  from the slice
+func (is *Ints) Evict(e int64) (ok bool) {
+	res := make([]int64, len(*is)-1)
+	for _, v := range *is {
+		if v != e {
+			res = append(res, v)
+		} else {
+			ok = true
+		}
+	}
+	*is = res
+	return
+}
+
+// Exist judge the sepcified num is in the slice or not
+func (is Ints) Exist(i int64) (e bool) {
+	for _, v := range is {
+		if v == i {
+			e = true
+			return
+		}
+	}
+	return
+}