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/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "msipriv.h"
#include "libmsi-istream.h"
struct _LibmsiIStream
{
GInputStream parent;
GsfInput *input;
};
static void libmsi_seekable_iface_init (GSeekableIface *iface);
G_DEFINE_TYPE_WITH_CODE (LibmsiIStream, libmsi_istream, G_TYPE_INPUT_STREAM,
G_IMPLEMENT_INTERFACE (G_TYPE_SEEKABLE,
libmsi_seekable_iface_init);
)
static goffset
libmsi_tell (GSeekable *seekable)
{
g_return_val_if_fail (LIBMSI_IS_ISTREAM(seekable), FALSE);
return gsf_input_tell (LIBMSI_ISTREAM(seekable)->input);
}
static gboolean
libmsi_can_seek (GSeekable *seekable)
{
return TRUE;
}
static gboolean
libmsi_seek (GSeekable *seekable, goffset offset,
GSeekType type, GCancellable *cancellable, GError **error)
{
g_return_val_if_fail (LIBMSI_IS_ISTREAM(seekable), FALSE);
return !gsf_input_seek (LIBMSI_ISTREAM(seekable)->input, offset, type);
}
static gboolean
libmsi_can_truncate (GSeekable *seekable)
{
return FALSE;
}
static void
libmsi_seekable_iface_init (GSeekableIface *iface)
{
iface->tell = libmsi_tell;
iface->can_seek = libmsi_can_seek;
iface->seek = libmsi_seek;
iface->can_truncate = libmsi_can_truncate;
}
static void
libmsi_istream_init (LibmsiIStream *self)
{
}
static void
libmsi_istream_finalize (GObject *object)
{
LibmsiIStream *self = LIBMSI_ISTREAM (object);
if (self->input)
g_object_unref (self->input);
G_OBJECT_CLASS (libmsi_istream_parent_class)->finalize (object);
}
static gssize
input_stream_read (GInputStream *stream,
void *buffer,
gsize count,
GCancellable *cancellable,
GError **error)
{
LibmsiIStream *self = LIBMSI_ISTREAM (stream);
gssize remaining = gsf_input_remaining (self->input);
if (remaining == 0)
return 0;
count = MIN(count, remaining);
if (!gsf_input_read (self->input, count, buffer))
return -1;
return count;
}
static gssize
input_stream_skip (GInputStream *stream,
gsize count,
GCancellable *cancellable,
GError **error)
{
LibmsiIStream *self = LIBMSI_ISTREAM (stream);
count = MIN (count, gsf_input_remaining (self->input));
if (!gsf_input_seek (self->input, count, G_SEEK_CUR))
return -1;
return count;
}
static gboolean
input_stream_close (GInputStream *stream,
GCancellable *cancellable,
GError **error)
{
return TRUE;
}
static void
libmsi_istream_class_init (LibmsiIStreamClass *klass)
{
GObjectClass* object_class = G_OBJECT_CLASS (klass);
GInputStreamClass *istream_class;
object_class->finalize = libmsi_istream_finalize;
istream_class = G_INPUT_STREAM_CLASS (klass);
istream_class->read_fn = input_stream_read;
istream_class->skip = input_stream_skip;
istream_class->close_fn = input_stream_close;
}
G_GNUC_INTERNAL LibmsiIStream *
libmsi_istream_new (GsfInput *input)
{
GsfInput *dup = gsf_input_dup (input, NULL);
g_return_val_if_fail (dup, NULL);
LibmsiIStream *self = g_object_new (LIBMSI_TYPE_ISTREAM, NULL);
self->input = dup;
return self;
}
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