add vendor

vendor/github.com/siddontang/ledisdb/store/rocksdb/slice.go

@@ -0,0 +1,41 @@
+//+build rocksdb
+
+package rocksdb
+
+// #cgo LDFLAGS: -lrocksdb
+// #include <rocksdb/c.h>
+// #include <stdlib.h>
+import "C"
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type CSlice struct {
+	data unsafe.Pointer
+	size int
+}
+
+func NewCSlice(p unsafe.Pointer, n int) *CSlice {
+	return &CSlice{p, n}
+}
+
+func (s *CSlice) Data() []byte {
+	var value []byte
+
+	sH := (*reflect.SliceHeader)(unsafe.Pointer(&value))
+	sH.Cap = int(s.size)
+	sH.Len = int(s.size)
+	sH.Data = uintptr(s.data)
+
+	return value
+}
+
+func (s *CSlice) Size() int {
+	return int(s.size)
+}
+
+func (s *CSlice) Free() {
+	C.free(s.data)
+}