libgdamm Reference Documentation |
Inheritance diagram for Gnome::Gda::BlobOp:
Public Member Functions | ||||
long | get_length () const | |||
Opens an existing BLOB. | ||||
const GdaBlobOp* | gobj () const | |||
Provides access to the underlying C GObject. | ||||
GdaBlobOp* | gobj () | |||
Provides access to the underlying C GObject. | ||||
GdaBlobOp* | gobj_copy () | |||
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. | ||||
long | read (Blob& blob, long offset, long size) | |||
Reads a chunk of bytes from the BLOB into blob . | ||||
bool | read_all (Blob& blob) | |||
Reads the whole contents of the blob manipulated by op into blob. | ||||
long | write (Blob& blob, long offset) | |||
Writes a chunk of bytes from a blob to the BLOB accessible through op . | ||||
bool | write_all (Blob& blob) | |||
Writes the whole contents of blob into the blob manipulated by op . | ||||
virtual | ~BlobOp () | |||
Static Public Member Functions | ||||
static Glib::RefPtr<BlobOp> | create () | |||
Protected Member Functions | ||||
BlobOp () | ||||
Related Functions | ||||
(Note that these are not member functions.) | ||||
Glib::RefPtr<Gnome::Gda::BlobOp> | wrap (GdaBlobOp* object, bool take_copy=false) | |||
|
This object is a base class for individual database providers which support BLOB types. It supports operations to read and write data in a BLOB.
virtual Gnome::Gda::BlobOp::~BlobOp | ( | ) | [virtual] |
Gnome::Gda::BlobOp::BlobOp | ( | ) | [protected] |
static Glib::RefPtr<BlobOp> Gnome::Gda::BlobOp::create | ( | ) | [static] |
long Gnome::Gda::BlobOp::get_length | ( | ) | const |
Opens an existing BLOB.
The BLOB must be initialized by gda_connection_create_blob or obtained from a G::Value. FIXME: gda_connection_create_blob() no longer exists.
const GdaBlobOp* Gnome::Gda::BlobOp::gobj | ( | ) | const [inline] |
GdaBlobOp* Gnome::Gda::BlobOp::gobj | ( | ) | [inline] |
GdaBlobOp* Gnome::Gda::BlobOp::gobj_copy | ( | ) |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
long Gnome::Gda::BlobOp::read | ( | Blob& | blob, | |
long | offset, | |||
long | size | |||
) |
Reads a chunk of bytes from the BLOB into blob .
blob | A Gda::Blob to read data to. | |
offset | Offset to read from the start of the blob (starts at 0). | |
size | Maximum number of bytes to read. |
bool Gnome::Gda::BlobOp::read_all | ( | Blob& | blob | ) |
Reads the whole contents of the blob manipulated by op into blob.
blob | A Gda::Blob to read data to. |
true
if blob ->data contains the whole BLOB manipulated by op . long Gnome::Gda::BlobOp::write | ( | Blob& | blob, | |
long | offset | |||
) |
Writes a chunk of bytes from a blob to the BLOB accessible through op .
blob | A Gda::Blob which contains the data to write. | |
offset | Offset to write from the start of the blob (starts at 0). |
bool Gnome::Gda::BlobOp::write_all | ( | Blob& | blob | ) |
Writes the whole contents of blob into the blob manipulated by op .
If necessary the resulting blob is truncated from its previous length.
blob | A Gda::Blob which contains the data to write. |
true
on success.
Glib::RefPtr<Gnome::Gda::BlobOp> wrap | ( | GdaBlobOp * | object, | |
bool | take_copy = false | |||
) | [related] |
object | The C instance |
take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref. |