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#ifndef __UNARCHIVE_H__
#define __UNARCHIVE_H__
#define ARCHIVE_PRESERVE_DATE 1
#define ARCHIVE_CREATE_LEADING_DIRS 2
#define ARCHIVE_EXTRACT_UNCONDITIONAL 4
#define ARCHIVE_EXTRACT_QUIET 8
#include <sys/types.h>
typedef struct gunzip_s {
unsigned short buffer_count;
unsigned char *buffer;
unsigned int crc;
unsigned int count;
} gunzip_t;
typedef struct file_headers_s {
char *name;
char *link_name;
off_t size;
uid_t uid;
gid_t gid;
mode_t mode;
time_t mtime;
dev_t device;
} file_header_t;
typedef struct llist_s {
const char *data;
const struct llist_s *link;
} llist_t;
typedef struct archive_handle_s {
/* define if the header and data compenent should processed */
char (*filter)(const llist_t *, const llist_t *, const char *);
const llist_t *accept;
const llist_t *reject;
/* Contains the processed header entry */
file_header_t *file_header;
/* process the header component, e.g. tar -t */
void (*action_header)(const file_header_t *);
/* process the data componenet, e.g. extract to filesystem */
void (*action_data)(struct archive_handle_s *);
char (*action_data_subarchive)(struct archive_handle_s *);
/* Contains the handle to a sub archive */
struct archive_handle_s *sub_archive;
/* The raw stream as read from disk or stdin */
int src_fd;
/* Count the number of bytes processed */
off_t offset;
/* Misc. stuff */
unsigned char flags;
} archive_handle_t;
extern archive_handle_t *init_handle(void);
extern char filter_accept_all(const llist_t *accept_list, const llist_t *reject_list, const char *key);
extern char filter_accept_list(const llist_t *accept_list, const llist_t *reject_list, const char *key);
extern char filter_accept_reject_list(const llist_t *accept_list, const llist_t *reject_list, const char *key);
extern void unpack_ar_archive(archive_handle_t *ar_archive);
extern void data_gunzip(archive_handle_t *archive_handle);
extern void data_skip(archive_handle_t *archive_handle);
extern void data_extract_all(archive_handle_t *archive_handle);
extern void data_extract_to_stdout(archive_handle_t *archive_handle);
extern void header_skip(const file_header_t *file_header);
extern void header_list(const file_header_t *file_header);
extern void header_verbose_list(const file_header_t *file_header);
extern void check_header_gzip(int src_fd);
extern void check_trailer_gzip(int src_fd);
extern char get_header_ar(archive_handle_t *archive_handle);
extern char get_header_tar(archive_handle_t *archive_handle);
extern char get_header_tar_gz(archive_handle_t *archive_handle);
//extern void seek_sub_file(int src_fd, unsigned int amount);
extern const unsigned short data_align(const int src_fd, const unsigned int offset, const unsigned short align_to);
extern const llist_t *add_to_list(const llist_t *old_head, const char *new_item);
extern int copy_file_chunk_fd(int src_fd, int dst_fd, unsigned long long chunksize);
#endif
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