storage_source: Move backing store parsers into new file

The parsers for the backing store strings are relatively self-contained
and rather massive piece of code. Move them to a new module called
storage_source_backingstore.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>

po/POTFILES.in

@@ -230,6 +230,7 @@
 @SRCDIR@src/storage_file/storage_file_backend_gluster.c
 @SRCDIR@src/storage_file/storage_file_probe.c
 @SRCDIR@src/storage_file/storage_source.c
+@SRCDIR@src/storage_file/storage_source_backingstore.c
 @SRCDIR@src/test/test_driver.c
 @SRCDIR@src/util/iohelper.c
 @SRCDIR@src/util/viralloc.c

src/storage_file/meson.build

@@ -1,5 +1,6 @@
 storage_file_sources = [
   'storage_source.c',
+  'storage_source_backingstore.c',
   'storage_file_backend.c',
   'storage_file_probe.c',
 ]

src/storage_file/storage_source_backingstore.h

@@ -0,0 +1,40 @@
+/*
+ * storage_source_backingstore.h: helpers for parsing backing store strings
+ *
+ * Copyright (C) 2007-2009, 2012-2016 Red Hat, Inc.
+ * Copyright (C) 2007-2008 Daniel P. Berrange
+ *
+ * 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, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "storage_source_conf.h"
+
+int
+virStorageSourceParseBackingURI(virStorageSourcePtr src,
+                                const char *uristr);
+
+int
+virStorageSourceParseRBDColonString(const char *rbdstr,
+                                    virStorageSourcePtr src);
+
+int
+virStorageSourceParseBackingColon(virStorageSourcePtr src,
+                                  const char *path);
+
+int
+virStorageSourceParseBackingJSON(virStorageSourcePtr src,
+                                 const char *json);