// Write writes len(data) bytes to the object with key oid starting at byte
// offset offset. It returns an error, if any.
func (ioctx *IOContext) Write(oid string, data []byte, offset uint64) error {
c_oid := C.CString(oid)
defer C.free(unsafe.Pointer(c_oid))
ret := C.rados_write(ioctx.ioctx, c_oid,
(*C.char)(unsafe.Pointer(&data[0])),
(C.size_t)(len(data)),
(C.uint64_t)(offset))
return GetRadosError(ret)
}
// Write writes the data at a specific offset to the object.
func (o *Object) Write(data io.Reader, offset uint64) error {
oid := C.CString(o.name)
defer freeString(oid)
bufAddr, length := readerToBuf(data)
ret := C.rados_write(o.ioContext, oid, bufAddr, length, C.uint64_t(offset))
if err := toRadosError(ret); err != nil {
err.Message = fmt.Sprintf("Unable to write data to object %s", o.name)
return err
}
return nil
}
// Write writes len(data) bytes to the object with key oid starting at byte
// offset offset. It returns an error, if any.
func (p *Pool) Write(oid string, data []byte, offset uint64) error {
c_oid := C.CString(oid)
defer C.free(unsafe.Pointer(c_oid))
ret := C.rados_write(p.ioctx, c_oid,
(*C.char)(unsafe.Pointer(&data[0])),
(C.size_t)(len(data)),
(C.uint64_t)(offset))
if ret == 0 {
return nil
} else {
return RadosError(int(ret))
}
}
func (r *RadosIoCtx) Write(oid string, bin []byte, offset uint64) error {
coid := C.CString(oid)
defer func() {
C.free(unsafe.Pointer(coid))
}()
originLen := len(bin)
if originLen == 0 {
bin = []byte{0}
}
cerr := C.rados_write(*r.ctx, coid, (*C.char)(unsafe.Pointer(&bin[0])), C.size_t(originLen), C.uint64_t(offset))
if cerr < 0 {
return errors.New("write data failed")
}
return nil
}
// WriteAt writes len(data) bytes to the RADOS object at the byte offset
// off. It returns the number of bytes written and an error, if any.
// Write returns a non-nil error when n < len(data).
func (o *Object) WriteAt(data []byte, off int64) (n int, err error) {
cname := C.CString(o.name)
defer C.free(unsafe.Pointer(cname))
for len(data) > 0 {
cdata, cdatalen := byteSliceToBuffer(data)
coff := C.uint64_t(off)
cerr := C.rados_write(o.c.ctx, cname, cdata, cdatalen, coff)
if cerr < 0 {
err = fmt.Errorf("RADOS write %s: %s", o.name, strerror(cerr))
break
}
n += int(cerr)
data = data[cerr:]
off += int64(cerr)
}
return
}
// WriteAt writes len(data) bytes to a RADOS object with a given key at the
// byte offset off. It returns the number of bytes written and an error, if
// any. Write returns a non-nil error when n < len(data).
func (c *Context) WriteAt(key string, data []byte, off int64) (n int, err error) {
ckey := C.CString(key)
defer C.free(unsafe.Pointer(ckey))
for len(data) > 0 {
cdata, cdatalen := byteSliceToBuffer(data)
coff := C.uint64_t(off)
cerr := C.rados_write(c.ctx, ckey, cdata, cdatalen, coff)
if cerr < 0 {
err = radosReturnCodeError(cerr)
break
}
n += int(cerr)
data = data[cerr:]
off += int64(cerr)
}
return
}
