import (
"fmt"
"io"
"unsafe"
"gopkg.in/errgo.v1"
)
const useLobRead2 = true
// Compile-time guarantees for interface implementations.
var _ = io.Writer(&ExternalLobVar{})
var _ = io.Reader(&ExternalLobVar{})
var _ = io.ReaderAt(&ExternalLobVar{})
var _ = io.WriterAt(&ExternalLobVar{})
// Defines the routines for handling LOB variables external to this module.
// ExternalLobVar is an external LOB var type.
// It is NOT concurrent-safe ATM.
type ExternalLobVar struct {
lobVar *Variable
idx uint
internalFetchNum uint
isFile bool
rwPos int64
}
func (lv ExternalLobVar) getHandle() *C.OCILobLocator {
lob, _ := lv.lobVar.getLobLoc(lv.idx)
n += int64(k)
if lr.off == lr.Length {
break
}
}
if lr.piece == C.OCI_FIRST_PIECE {
lr.piece = C.OCI_NEXT_PIECE
}
}
return n, nil
}
// TODO(tgulacsi): find how to return lobReadWriter.
var _ = io.ReaderAt((*lobReadWriter)(nil))
var _ = io.WriterAt((*lobReadWriter)(nil))
type lobReadWriter struct {
ses *Ses
ociLobLocator *C.OCILobLocator
charsetForm C.ub1
size C.oraub8
}
// Size returns the actual size of the LOB.
func (lrw lobReadWriter) Size() uint64 {
return uint64(lrw.size)
}
// Close the LOB.
func (lrw *lobReadWriter) Close() error {