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#include <config.h>
#include <glib.h>
#include <glib/gi18n-lib.h>
#include <gfileinputstream.h>
#include <gseekable.h>
static void g_file_input_stream_seekable_iface_init (GSeekableIface *iface);
static goffset g_file_input_stream_tell (GSeekable *seekable);
static gboolean g_file_input_stream_can_seek (GSeekable *seekable);
static gboolean g_file_input_stream_seek (GSeekable *seekable,
goffset offset,
GSeekType type,
GCancellable *cancellable,
GError **error);
static gboolean g_file_input_stream_can_truncate (GSeekable *seekable);
static gboolean g_file_input_stream_truncate (GSeekable *seekable,
goffset offset,
GCancellable *cancellable,
GError **error);
G_DEFINE_TYPE_WITH_CODE (GFileInputStream, g_file_input_stream, G_TYPE_INPUT_STREAM,
G_IMPLEMENT_INTERFACE (G_TYPE_SEEKABLE,
g_file_input_stream_seekable_iface_init))
struct _GFileInputStreamPrivate {
guint dummy;
};
static void
g_file_input_stream_class_init (GFileInputStreamClass *klass)
{
g_type_class_add_private (klass, sizeof (GFileInputStreamPrivate));
}
static void
g_file_input_stream_seekable_iface_init (GSeekableIface *iface)
{
iface->tell = g_file_input_stream_tell;
iface->can_seek = g_file_input_stream_can_seek;
iface->seek = g_file_input_stream_seek;
iface->can_truncate = g_file_input_stream_can_truncate;
iface->truncate = g_file_input_stream_truncate;
}
static void
g_file_input_stream_init (GFileInputStream *stream)
{
stream->priv = G_TYPE_INSTANCE_GET_PRIVATE (stream,
G_TYPE_FILE_INPUT_STREAM,
GFileInputStreamPrivate);
}
GFileInfo *
g_file_input_stream_get_file_info (GFileInputStream *stream,
GFileInfoRequestFlags requested,
char *attributes,
GCancellable *cancellable,
GError **error)
{
GFileInputStreamClass *class;
GInputStream *input_stream;
GFileInfo *info;
g_return_val_if_fail (G_IS_FILE_INPUT_STREAM (stream), NULL);
g_return_val_if_fail (stream != NULL, NULL);
input_stream = G_INPUT_STREAM (stream);
if (g_input_stream_is_closed (input_stream))
{
g_set_error (error, G_VFS_ERROR, G_VFS_ERROR_CLOSED,
_("Stream is already closed"));
return NULL;
}
if (g_input_stream_has_pending (input_stream))
{
g_set_error (error, G_VFS_ERROR, G_VFS_ERROR_PENDING,
_("Stream has outstanding operation"));
return NULL;
}
info = NULL;
g_input_stream_set_pending (input_stream, TRUE);
if (cancellable)
g_push_current_cancellable (cancellable);
class = G_FILE_INPUT_STREAM_GET_CLASS (stream);
if (class->get_file_info)
info = class->get_file_info (stream, requested, attributes, cancellable, error);
else
g_set_error (error, G_VFS_ERROR, G_VFS_ERROR_NOT_SUPPORTED,
_("Stream doesn't support get_file_info"));
if (cancellable)
g_pop_current_cancellable (cancellable);
g_input_stream_set_pending (input_stream, FALSE);
return info;
}
static goffset
g_file_input_stream_tell (GSeekable *seekable)
{
GFileInputStream *file;
GFileInputStreamClass *class;
goffset offset;
file = G_FILE_INPUT_STREAM (seekable);
class = G_FILE_INPUT_STREAM_GET_CLASS (file);
offset = 0;
if (class->tell)
offset = class->tell (file);
return offset;
}
static gboolean
g_file_input_stream_can_seek (GSeekable *seekable)
{
GFileInputStream *file;
GFileInputStreamClass *class;
gboolean can_seek;
file = G_FILE_INPUT_STREAM (seekable);
class = G_FILE_INPUT_STREAM_GET_CLASS (file);
can_seek = FALSE;
if (class->seek)
{
can_seek = TRUE;
if (class->can_seek)
can_seek = class->can_seek (file);
}
return can_seek;
}
static gboolean
g_file_input_stream_seek (GSeekable *seekable,
goffset offset,
GSeekType type,
GCancellable *cancellable,
GError **error)
{
GFileInputStream *file;
GFileInputStreamClass *class;
GInputStream *input_stream;
gboolean res;
input_stream = G_INPUT_STREAM (seekable);
file = G_FILE_INPUT_STREAM (seekable);
class = G_FILE_INPUT_STREAM_GET_CLASS (file);
if (g_input_stream_is_closed (input_stream))
{
g_set_error (error, G_VFS_ERROR, G_VFS_ERROR_CLOSED,
_("Stream is already closed"));
return FALSE;
}
if (g_input_stream_has_pending (input_stream))
{
g_set_error (error, G_VFS_ERROR, G_VFS_ERROR_PENDING,
_("Stream has outstanding operation"));
return FALSE;
}
if (!class->seek)
{
g_set_error (error, G_VFS_ERROR, G_VFS_ERROR_NOT_SUPPORTED,
_("Seek not supported on stream"));
return FALSE;
}
g_input_stream_set_pending (input_stream, TRUE);
if (cancellable)
g_push_current_cancellable (cancellable);
res = class->seek (file, offset, type, cancellable, error);
if (cancellable)
g_pop_current_cancellable (cancellable);
g_input_stream_set_pending (input_stream, FALSE);
return res;
}
static gboolean
g_file_input_stream_can_truncate (GSeekable *seekable)
{
return FALSE;
}
static gboolean
g_file_input_stream_truncate (GSeekable *seekable,
goffset offset,
GCancellable *cancellable,
GError **error)
{
g_set_error (error, G_VFS_ERROR, G_VFS_ERROR_NOT_SUPPORTED,
_("Truncate not allowed on input stream"));
return FALSE;
}
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