glib/gio/gvfs.c
Dan Winship 1481b7bca3 Add _g_io_module_get_default(), use to simplify other *_get_default()s
Add _g_io_module_get_default(), which implements the
figure-out-the-best-available-module-that-is-actually-usable logic,
and use that to simplify g_proxy_resolver_get_default(),
g_settings_backend_get_default(), g_tls_backend_get_default(), and
g_vfs_get_default().

https://bugzilla.gnome.org/show_bug.cgi?id=620932
2011-10-04 13:20:34 -04:00

205 lines
4.5 KiB
C

/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* 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 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., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#include "config.h"
#include <string.h>
#include "gvfs.h"
#include "glocalvfs.h"
#include "giomodule-priv.h"
#include "glibintl.h"
/**
* SECTION:gvfs
* @short_description: Virtual File System
* @include: gio/gio.h
*
* Entry point for using GIO functionality.
*
**/
G_DEFINE_TYPE (GVfs, g_vfs, G_TYPE_OBJECT);
static void
g_vfs_class_init (GVfsClass *klass)
{
}
static void
g_vfs_init (GVfs *vfs)
{
}
/**
* g_vfs_is_active:
* @vfs: a #GVfs.
*
* Checks if the VFS is active.
*
* Returns: %TRUE if construction of the @vfs was successful and it is now active.
**/
gboolean
g_vfs_is_active (GVfs *vfs)
{
GVfsClass *class;
g_return_val_if_fail (G_IS_VFS (vfs), FALSE);
class = G_VFS_GET_CLASS (vfs);
return (* class->is_active) (vfs);
}
/**
* g_vfs_get_file_for_path:
* @vfs: a #GVfs.
* @path: a string containing a VFS path.
*
* Gets a #GFile for @path.
*
* Returns: (transfer full): a #GFile.
* Free the returned object with g_object_unref().
**/
GFile *
g_vfs_get_file_for_path (GVfs *vfs,
const char *path)
{
GVfsClass *class;
g_return_val_if_fail (G_IS_VFS (vfs), NULL);
g_return_val_if_fail (path != NULL, NULL);
class = G_VFS_GET_CLASS (vfs);
return (* class->get_file_for_path) (vfs, path);
}
/**
* g_vfs_get_file_for_uri:
* @vfs: a#GVfs.
* @uri: a string containing a URI
*
* Gets a #GFile for @uri.
*
* This operation never fails, but the returned object
* might not support any I/O operation if the URI
* is malformed or if the URI scheme is not supported.
*
* Returns: (transfer full): a #GFile.
* Free the returned object with g_object_unref().
**/
GFile *
g_vfs_get_file_for_uri (GVfs *vfs,
const char *uri)
{
GVfsClass *class;
g_return_val_if_fail (G_IS_VFS (vfs), NULL);
g_return_val_if_fail (uri != NULL, NULL);
class = G_VFS_GET_CLASS (vfs);
return (* class->get_file_for_uri) (vfs, uri);
}
/**
* g_vfs_get_supported_uri_schemes:
* @vfs: a #GVfs.
*
* Gets a list of URI schemes supported by @vfs.
*
* Returns: (transfer none): a %NULL-terminated array of strings.
* The returned array belongs to GIO and must
* not be freed or modified.
**/
const gchar * const *
g_vfs_get_supported_uri_schemes (GVfs *vfs)
{
GVfsClass *class;
g_return_val_if_fail (G_IS_VFS (vfs), NULL);
class = G_VFS_GET_CLASS (vfs);
return (* class->get_supported_uri_schemes) (vfs);
}
/**
* g_vfs_parse_name:
* @vfs: a #GVfs.
* @parse_name: a string to be parsed by the VFS module.
*
* This operation never fails, but the returned object might
* not support any I/O operations if the @parse_name cannot
* be parsed by the #GVfs module.
*
* Returns: (transfer full): a #GFile for the given @parse_name.
* Free the returned object with g_object_unref().
**/
GFile *
g_vfs_parse_name (GVfs *vfs,
const char *parse_name)
{
GVfsClass *class;
g_return_val_if_fail (G_IS_VFS (vfs), NULL);
g_return_val_if_fail (parse_name != NULL, NULL);
class = G_VFS_GET_CLASS (vfs);
return (* class->parse_name) (vfs, parse_name);
}
/**
* g_vfs_get_default:
*
* Gets the default #GVfs for the system.
*
* Returns: (transfer none): a #GVfs.
**/
GVfs *
g_vfs_get_default (void)
{
return _g_io_module_get_default (G_VFS_EXTENSION_POINT_NAME,
"GIO_USE_VFS",
(GIOModuleVerifyFunc)g_vfs_is_active);
}
/**
* g_vfs_get_local:
*
* Gets the local #GVfs for the system.
*
* Returns: (transfer none): a #GVfs.
**/
GVfs *
g_vfs_get_local (void)
{
static gsize vfs = 0;
if (g_once_init_enter (&vfs))
g_once_init_leave (&vfs, (gsize)_g_local_vfs_new ());
return G_VFS (vfs);
}