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app/service/main/relation/model/i64b/BUILD

@@ -0,0 +1,35 @@
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+    "go_test",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = ["xints.go"],
+    importpath = "go-common/app/service/main/relation/model/i64b",
+    tags = ["automanaged"],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["xints_test.go"],
+    embed = [":go_default_library"],
+    rundir = ".",
+    tags = ["automanaged"],
+)

app/service/main/relation/model/i64b/xints.go

@@ -0,0 +1,91 @@
+package i64b
+
+import (
+	"database/sql/driver"
+	"encoding/binary"
+)
+
+//Int64Bytes be used to MySql\Protobuf varbinary converting.
+type Int64Bytes []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 Int64Bytes) 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 Int64Bytes) Size() int {
+	return len(is) * 8
+}
+
+// Unmarshal parse the data into int64 slice
+func (is *Int64Bytes) Unmarshal(data []byte) error {
+	return is.Scan(data)
+}
+
+// Scan parse the data into int64 slice
+func (is *Int64Bytes) 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 Int64Bytes) Value() (driver.Value, error) {
+	return is.Bytes(), nil
+}
+
+// Bytes marshal int64 slice to bytes,each int64 will occupy Fixed 8 bytes
+func (is Int64Bytes) 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 *Int64Bytes) 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 Int64Bytes) Exist(i int64) (e bool) {
+	for _, v := range is {
+		if v == i {
+			e = true
+			return
+		}
+	}
+	return
+}

app/service/main/relation/model/i64b/xints_test.go

@@ -0,0 +1,74 @@
+package i64b
+
+import (
+	"testing"
+)
+
+func TestMarshalAndUnmarshal(t *testing.T) {
+	var a = Int64Bytes{1, 2, 3}
+	data := make([]byte, a.Size())
+	n, err := a.MarshalTo(data)
+	if n != 24 {
+		t.Logf("marshal size must be 24")
+		t.FailNow()
+	}
+	if err != nil {
+		t.Fatalf("err:%v", err)
+	}
+
+	var b Int64Bytes
+	err = b.Unmarshal(data)
+	if err != nil {
+		t.Fatalf("err:%v", err)
+	}
+	if b[0] != 1 || b[1] != 2 || b[2] != 3 {
+		t.Logf("unmarshal failed!b:%v", b)
+		t.FailNow()
+	}
+}
+
+func TestUncompleteMarshal(t *testing.T) {
+	var a = Int64Bytes{1, 2, 3}
+	data := make([]byte, a.Size()-7)
+	n, err := a.MarshalTo(data)
+	if n != 16 {
+		t.Logf("marshal size must be 16")
+		t.FailNow()
+	}
+	if err != nil {
+		t.Fatalf("err:%v", err)
+	}
+
+	var b Int64Bytes
+	err = b.Unmarshal(data)
+	if err != nil {
+		t.Fatalf("err:%v", err)
+	}
+	if b[0] != 1 || b[1] != 2 {
+		t.Logf("unmarshal failed!b:%v", b)
+		t.FailNow()
+	}
+}
+
+func TestNilMarshal(t *testing.T) {
+	var a = Int64Bytes{1, 2, 3}
+	var data []byte
+	n, err := a.MarshalTo(data)
+	if n != 0 {
+		t.Logf("marshal size must be 0")
+		t.FailNow()
+	}
+	if err != nil {
+		t.Fatalf("err:%v", err)
+	}
+	var b Int64Bytes
+	err = b.Unmarshal(data)
+	if err != nil {
+		t.Fatalf("err:%v", err)
+	}
+	if b != nil {
+		t.Logf("unmarshal failed!b:%v", b)
+		t.FailNow()
+	}
+
+}