hack add int to slice

hack/hack.go

@@ -25,3 +25,19 @@ func Slice(s string) (b []byte) {
 	pbytes.Cap = pstring.Len
 	return
 }
+
+func Int64Slice(v int64) (b []byte) {
+	pbytes := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	pbytes.Data = uintptr(unsafe.Pointer(&v))
+	pbytes.Len = 8
+	pbytes.Cap = 8
+	return
+}
+
+func Int32Slice(v int32) (b []byte) {
+	pbytes := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	pbytes.Data = uintptr(unsafe.Pointer(&v))
+	pbytes.Len = 4
+	pbytes.Cap = 4
+	return
+}

hack/hack_test.go

@@ -2,6 +2,7 @@ package hack
 
 import (
 	"bytes"
+	"encoding/binary"
 	"testing"
 )
 
@@ -34,3 +35,21 @@ func TestByte(t *testing.T) {
 		t.Fatal(string(b))
 	}
 }
+
+func TestInt(t *testing.T) {
+	if int64(binary.LittleEndian.Uint64(IntSlice(1))) != 1 {
+		t.Fatal("error")
+	}
+
+	if int64(binary.LittleEndian.Uint64(IntSlice(-1))) != -1 {
+		t.Fatal("error")
+	}
+
+	if int64(binary.LittleEndian.Uint64(IntSlice(32768))) != 32768 {
+		t.Fatal(1)
+	}
+
+	if int64(binary.LittleEndian.Uint64(IntSlice(-32768))) != -32768 {
+		t.Fatal(1)
+	}
+}