--- /dev/null
+/*
+ * Amanda, The Advanced Maryland Automatic Network Disk Archiver
+ * Copyright (c) 2009 Zmanda, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program 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 General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Contact information: Zmanda Inc., 465 S. Mathilda Ave., Suite 300
+ * Sunnyvale, CA 94085, USA, or: http://www.zmanda.com
+ */
+
+#include "amanda.h"
+#include "amxfer.h"
+#include "device.h"
+#include "property.h"
+#include "xfer-device.h"
+
+/*
+ * Class declaration
+ *
+ * This declaration is entirely private; nothing but xfer_source_device() references
+ * it directly.
+ */
+
+GType xfer_source_device_get_type(void);
+#define XFER_SOURCE_DEVICE_TYPE (xfer_source_device_get_type())
+#define XFER_SOURCE_DEVICE(obj) G_TYPE_CHECK_INSTANCE_CAST((obj), xfer_source_device_get_type(), XferSourceDevice)
+#define XFER_SOURCE_DEVICE_CONST(obj) G_TYPE_CHECK_INSTANCE_CAST((obj), xfer_source_device_get_type(), XferSourceDevice const)
+#define XFER_SOURCE_DEVICE_CLASS(klass) G_TYPE_CHECK_CLASS_CAST((klass), xfer_source_device_get_type(), XferSourceDeviceClass)
+#define IS_XFER_SOURCE_DEVICE(obj) G_TYPE_CHECK_INSTANCE_TYPE((obj), xfer_source_device_get_type ())
+#define XFER_SOURCE_DEVICE_GET_CLASS(obj) G_TYPE_INSTANCE_GET_CLASS((obj), xfer_source_device_get_type(), XferSourceDeviceClass)
+
+static GObjectClass *parent_class = NULL;
+
+/*
+ * Main object structure
+ */
+
+typedef struct XferSourceDevice {
+ XferElement __parent__;
+
+ Device *device;
+ size_t block_size;
+ gboolean cancelled;
+} XferSourceDevice;
+
+/*
+ * Class definition
+ */
+
+typedef struct {
+ XferElementClass __parent__;
+} XferSourceDeviceClass;
+
+/*
+ * Implementation
+ */
+
+static gpointer
+pull_buffer_impl(
+ XferElement *elt,
+ size_t *size)
+{
+ XferSourceDevice *self = (XferSourceDevice *)elt;
+ gpointer buf = NULL;
+ int result;
+ int devsize;
+
+ /* indicate EOF on an cancel */
+ if (elt->cancelled) {
+ *size = 0;
+ return NULL;
+ }
+
+ /* get the device block size */
+ if (self->block_size == 0) {
+ self->block_size = self->device->block_size;
+ }
+
+ do {
+ buf = g_malloc(self->block_size);
+ devsize = (int)self->block_size;
+ result = device_read_block(self->device, buf, &devsize);
+ *size = devsize;
+
+ /* if the buffer was too small, loop around again */
+ if (result == 0) {
+ g_assert(*size > self->block_size);
+ self->block_size = devsize;
+ amfree(buf);
+ }
+ } while (result == 0);
+
+ if (result < 0) {
+ amfree(buf);
+
+ /* if we're not at EOF, it's an error */
+ if (!self->device->is_eof) {
+ xfer_cancel_with_error(elt,
+ _("error reading from %s: %s"),
+ self->device->device_name,
+ device_error_or_status(self->device));
+ wait_until_xfer_cancelled(elt->xfer);
+ }
+
+ *size = 0;
+ return NULL;
+ }
+
+ return buf;
+}
+
+static void
+instance_init(
+ XferElement *elt)
+{
+ elt->can_generate_eof = TRUE;
+}
+
+static void
+class_init(
+ XferSourceDeviceClass * selfc)
+{
+ XferElementClass *klass = XFER_ELEMENT_CLASS(selfc);
+ static xfer_element_mech_pair_t mech_pairs[] = {
+ { XFER_MECH_NONE, XFER_MECH_PULL_BUFFER, 0, 1},
+ { XFER_MECH_NONE, XFER_MECH_NONE, 0, 0},
+ };
+
+ klass->pull_buffer = pull_buffer_impl;
+
+ klass->perl_class = "Amanda::Xfer::Source::Device";
+ klass->mech_pairs = mech_pairs;
+
+ parent_class = g_type_class_peek_parent(selfc);
+}
+
+GType
+xfer_source_device_get_type (void)
+{
+ static GType type = 0;
+
+ if G_UNLIKELY(type == 0) {
+ static const GTypeInfo info = {
+ sizeof (XferSourceDeviceClass),
+ (GBaseInitFunc) NULL,
+ (GBaseFinalizeFunc) NULL,
+ (GClassInitFunc) class_init,
+ (GClassFinalizeFunc) NULL,
+ NULL /* class_data */,
+ sizeof (XferSourceDevice),
+ 0 /* n_preallocs */,
+ (GInstanceInitFunc) instance_init,
+ NULL
+ };
+
+ type = g_type_register_static (XFER_ELEMENT_TYPE, "XferSourceDevice", &info, 0);
+ }
+
+ return type;
+}
+
+/* create an element of this class; prototype is in xfer-device.h */
+XferElement *
+xfer_source_device(
+ Device *device)
+{
+ XferSourceDevice *self = (XferSourceDevice *)g_object_new(XFER_SOURCE_DEVICE_TYPE, NULL);
+ XferElement *elt = XFER_ELEMENT(self);
+
+ g_assert(device != NULL);
+
+ self->device = device;
+
+ return elt;
+}