/* vim: set sw=8: -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * gsf-zip-impl.h: 
 *
 * Copyright (C) 2002-2006 Tambet Ingo (tambet@ximian.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2.1 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 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 St, Fifth Floor, Boston, MA  02110-1301
 * USA
 */

#ifndef GSF_ZIP_IMPL_H
#define GSF_ZIP_IMPL_H

#include <gsf/gsf-outfile-zip.h> /* for GsfZipCompressionMethod */

G_BEGIN_DECLS

#define ZIP_HEADER_SIZE 		30
#define ZIP_HEADER_VERSION 		 4
#define ZIP_HEADER_OS	 		 5
#define ZIP_HEADER_FLAGS 	         6
#define ZIP_HEADER_COMP_METHOD           8
#define ZIP_HEADER_TIME                 10
#define ZIP_HEADER_CRC 			14
#define ZIP_HEADER_COMP_SIZE		18
#define ZIP_HEADER_UNCOMP_SIZE          22
#define ZIP_HEADER_NAME_LEN		26
#define ZIP_HEADER_EXTRA_LEN		28

#define ZIP_TRAILER_SIZE 		22
#define ZIP_TRAILER_DISK 		4
#define ZIP_TRAILER_DIR_DISK 		6
#define ZIP_TRAILER_ENTRIES 		8
#define ZIP_TRAILER_TOTAL_ENTRIES 	10
#define ZIP_TRAILER_DIR_SIZE 		12
#define ZIP_TRAILER_DIR_POS 		16
#define ZIP_TRAILER_COMMENT_SIZE	20

#define ZIP_DIRENT_SIZE                 46
#define ZIP_DIRENT_ENCODER              4
#define ZIP_DIRENT_EXTRACT              6
#define ZIP_DIRENT_FLAGS                8
#define ZIP_DIRENT_COMPR_METHOD         10
#define ZIP_DIRENT_DOSTIME              12
#define ZIP_DIRENT_CRC32                16
#define ZIP_DIRENT_CSIZE                20
#define ZIP_DIRENT_USIZE                24
#define ZIP_DIRENT_NAME_SIZE            28
#define ZIP_DIRENT_EXTRAS_SIZE          30
#define ZIP_DIRENT_COMMENT_SIZE         32
#define ZIP_DIRENT_DISKSTART            34
#define ZIP_DIRENT_FILE_TYPE            36
#define ZIP_DIRENT_FILE_MODE            38
#define ZIP_DIRENT_OFFSET               42

#define ZIP_FILE_HEADER_SIZE            30
#define ZIP_FILE_HEADER_EXTRACT          4
#define ZIP_FILE_HEADER_FLAGS            6
#define ZIP_FILE_HEADER_COMPR_METHOD     8
#define ZIP_FILE_HEADER_DOSTIME         10
#define ZIP_FILE_HEADER_CRC32           14
#define ZIP_FILE_HEADER_CSIZE           18
#define ZIP_FILE_HEADER_USIZE           22
#define ZIP_FILE_HEADER_NAME_SIZE       26
#define ZIP_FILE_HEADER_EXTRAS_SIZE     28

#define ZIP_NAME_SEPARATOR    '/'

#define ZIP_BLOCK_SIZE 32768
#define ZIP_BUF_SIZE 512


/* z_flags */
#define ZZIP_IS_ENCRYPTED(p)    ((*(unsigned char*)p)&1)
#define ZZIP_IS_COMPRLEVEL(p)  (((*(unsigned char*)p)>>1)&3)
#define ZZIP_IS_STREAMED(p)    (((*(unsigned char*)p)>>3)&1)

typedef struct {	
	char                    *name;
	GsfZipCompressionMethod  compr_method;
	guint32                  crc32;
	size_t                   csize;
	size_t                   usize;
	gsf_off_t                offset;
	gsf_off_t                data_offset;
	guint32                  dostime;
} GsfZipDirent;

typedef struct {
	char *name;
	gboolean is_directory;
	GsfZipDirent *dirent;
	GSList *children, *last_child;
} GsfZipVDir;

GsfZipDirent *gsf_zip_dirent_new  (void);
void          gsf_zip_dirent_free (GsfZipDirent *dirent);

GsfZipVDir *gsf_vdir_new	(char const *name, gboolean is_directory,
				 GsfZipDirent *dirent);
void	    gsf_vdir_free	(GsfZipVDir *vdir, gboolean free_dirent);
void	    gsf_vdir_add_child	(GsfZipVDir *vdir, GsfZipVDir *child);

G_END_DECLS

#endif /* GSF_ZIP_IMPL_H */