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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-stream-fs.h :stream based on unix filesystem */
/*
* Author:
* Bertrand Guiheneuf <bertrand@helixcode.com>
*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU Lesser General Public
* License 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#ifndef CAMEL_SEEKABLE_STREAM_H
#define CAMEL_SEEKABLE_STREAM_H 1
#include <sys/types.h>
#include <unistd.h>
#include <camel/camel-stream.h>
#define CAMEL_SEEKABLE_STREAM_TYPE (camel_seekable_stream_get_type ())
#define CAMEL_SEEKABLE_STREAM(obj) (CAMEL_CHECK_CAST((obj), CAMEL_SEEKABLE_STREAM_TYPE, CamelSeekableStream))
#define CAMEL_SEEKABLE_STREAM_CLASS(k) (CAMEL_CHECK_CLASS_CAST ((k), CAMEL_SEEKABLE_STREAM_TYPE, CamelSeekableStreamClass))
#define CAMEL_IS_SEEKABLE_STREAM(o) (CAMEL_CHECK_TYPE((o), CAMEL_SEEKABLE_STREAM_TYPE))
G_BEGIN_DECLS
typedef enum {
CAMEL_STREAM_SET = SEEK_SET,
CAMEL_STREAM_CUR = SEEK_CUR,
CAMEL_STREAM_END = SEEK_END
} CamelStreamSeekPolicy;
#define CAMEL_STREAM_UNBOUND (~0)
struct _CamelSeekableStream {
CamelStream parent_object;
off_t position; /* current postion in the stream */
off_t bound_start; /* first valid position */
off_t bound_end; /* first invalid position */
};
typedef struct {
CamelStreamClass parent_class;
/* Virtual methods */
off_t (*seek) (CamelSeekableStream *stream, off_t offset,
CamelStreamSeekPolicy policy);
off_t (*tell) (CamelSeekableStream *stream);
gint (*set_bounds) (CamelSeekableStream *stream,
off_t start, off_t end);
} CamelSeekableStreamClass;
/* Standard Camel function */
CamelType camel_seekable_stream_get_type (void);
/* public methods */
off_t camel_seekable_stream_seek (CamelSeekableStream *stream, off_t offset,
CamelStreamSeekPolicy policy);
off_t camel_seekable_stream_tell (CamelSeekableStream *stream);
gint camel_seekable_stream_set_bounds (CamelSeekableStream *stream, off_t start, off_t end);
G_END_DECLS
#endif /* CAMEL_SEEKABLE_STREAM_H */
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