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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* gnome-vfs-handle.c - Handle object for GNOME VFS files.
Copyright (C) 1999 Free Software Foundation
The Gnome Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Gnome 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the Gnome Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Ettore Perazzoli <ettore@gnu.org>
*/
#include <config.h>
#include "gnome-vfs-handle.h"
#include "gnome-vfs-handle-private.h"
#include "gnome-vfs-method.h"
#include <glib.h>
struct GnomeVFSHandle {
/* URI of the file being accessed through the handle. */
GnomeVFSURI *uri;
/* Method-specific handle. */
GnomeVFSMethodHandle *method_handle;
/* Open mode. */
GnomeVFSOpenMode open_mode;
};
#define CHECK_IF_OPEN(handle) \
G_STMT_START{ \
if (handle->uri == NULL) \
return GNOME_VFS_ERROR_NOT_OPEN; \
}G_STMT_END
#define CHECK_IF_SUPPORTED(handle, what) \
G_STMT_START{ \
if (!VFS_METHOD_HAS_FUNC(handle->uri->method, what)) \
return GNOME_VFS_ERROR_NOT_SUPPORTED; \
}G_STMT_END
#define INVOKE(result, handle, what, params) \
G_STMT_START{ \
CHECK_IF_OPEN (handle); \
CHECK_IF_SUPPORTED (handle, what); \
(result) = handle->uri->method->what params; \
}G_STMT_END
#define INVOKE_AND_RETURN(handle, what, params) \
G_STMT_START{ \
GnomeVFSResult __result; \
\
INVOKE (__result, handle, what, params); \
return __result; \
}G_STMT_END
GnomeVFSHandle *
_gnome_vfs_handle_new (GnomeVFSURI *uri,
GnomeVFSMethodHandle *method_handle,
GnomeVFSOpenMode open_mode)
{
GnomeVFSHandle *new;
g_return_val_if_fail (uri != NULL, NULL);
g_return_val_if_fail (method_handle != NULL, NULL);
new = g_new (GnomeVFSHandle, 1);
new->uri = gnome_vfs_uri_ref (uri);
new->method_handle = method_handle;
new->open_mode = open_mode;
return new;
}
void
_gnome_vfs_handle_destroy (GnomeVFSHandle *handle)
{
g_return_if_fail (handle != NULL);
gnome_vfs_uri_unref (handle->uri);
g_free (handle);
}
GnomeVFSOpenMode
_gnome_vfs_handle_get_open_mode (GnomeVFSHandle *handle)
{
g_return_val_if_fail (handle != NULL, (GnomeVFSOpenMode) 0);
return handle->open_mode;
}
/* Actions. */
GnomeVFSResult
_gnome_vfs_handle_do_close (GnomeVFSHandle *handle,
GnomeVFSContext *context)
{
GnomeVFSResult result;
INVOKE (result, handle, close, (handle->uri->method, handle->method_handle, context));
/* Even if close has failed, we shut down the handle. */
_gnome_vfs_handle_destroy (handle);
return result;
}
GnomeVFSResult
_gnome_vfs_handle_do_read (GnomeVFSHandle *handle,
gpointer buffer,
GnomeVFSFileSize num_bytes,
GnomeVFSFileSize *bytes_read,
GnomeVFSContext *context)
{
INVOKE_AND_RETURN (handle, read, (handle->uri->method, handle->method_handle,
buffer, num_bytes, bytes_read,
context));
}
GnomeVFSResult
_gnome_vfs_handle_forget_cache (GnomeVFSHandle *handle,
GnomeVFSFileOffset offset,
GnomeVFSFileSize size)
{
INVOKE_AND_RETURN (handle, forget_cache, (handle->uri->method, handle->method_handle,
offset, size));
}
GnomeVFSResult
_gnome_vfs_handle_do_write (GnomeVFSHandle *handle,
gconstpointer buffer,
GnomeVFSFileSize num_bytes,
GnomeVFSFileSize *bytes_written,
GnomeVFSContext *context)
{
INVOKE_AND_RETURN (handle, write, (handle->uri->method, handle->method_handle,
buffer, num_bytes, bytes_written,
context));
}
GnomeVFSResult
_gnome_vfs_handle_do_seek (GnomeVFSHandle *handle,
GnomeVFSSeekPosition whence,
GnomeVFSFileSize offset,
GnomeVFSContext *context)
{
INVOKE_AND_RETURN (handle, seek, (handle->uri->method, handle->method_handle,
whence, offset, context));
}
GnomeVFSResult
_gnome_vfs_handle_do_tell (GnomeVFSHandle *handle,
GnomeVFSFileSize *offset_return)
{
INVOKE_AND_RETURN (handle, tell, (handle->uri->method, handle->method_handle,
offset_return));
}
GnomeVFSResult
_gnome_vfs_handle_do_get_file_info (GnomeVFSHandle *handle,
GnomeVFSFileInfo *info,
GnomeVFSFileInfoOptions options,
GnomeVFSContext *context)
{
INVOKE_AND_RETURN (handle, get_file_info_from_handle,
(handle->uri->method, handle->method_handle, info, options,
context));
}
GnomeVFSResult _gnome_vfs_handle_do_truncate (GnomeVFSHandle *handle,
GnomeVFSFileSize length,
GnomeVFSContext *context)
{
INVOKE_AND_RETURN (handle, truncate_handle, (handle->uri->method, handle->method_handle, length, context));
}
GnomeVFSResult
_gnome_vfs_handle_do_file_control (GnomeVFSHandle *handle,
const char *operation,
gpointer operation_data,
GnomeVFSContext *context)
{
INVOKE_AND_RETURN (handle, file_control, (handle->uri->method, handle->method_handle, operation, operation_data, context));
}
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