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#ifndef _IPXE_GZIP_H
#define _IPXE_GZIP_H
/** @file
*
* gzip compressed images
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
#include <ipxe/image.h>
/** gzip header */
struct gzip_header {
/** Magic ID */
uint16_t magic;
/** Compression method */
uint8_t method;
/** Flags */
uint8_t flags;
/** Modification time */
uint32_t mtime;
/** Extra flags */
uint8_t extra;
/** Operating system */
uint8_t os;
} __attribute__ (( packed ));
/** Magic ID */
#define GZIP_MAGIC 0x1f8b
/** Compression method */
#define GZIP_METHOD_DEFLATE 0x08
/** CRC header is present */
#define GZIP_FL_HCRC 0x02
/** Extra header is present */
#define GZIP_FL_EXTRA 0x04
/** File name is present */
#define GZIP_FL_NAME 0x08
/** File comment is present */
#define GZIP_FL_COMMENT 0x10
/** gzip extra header */
struct gzip_extra_header {
/** Extra header length (excluding this field) */
uint16_t len;
} __attribute__ (( packed ));
/** gzip CRC header */
struct gzip_crc_header {
/** CRC-16 */
uint16_t crc;
} __attribute__ (( packed ));
/** gzip footer */
struct gzip_footer {
/** CRC-32 */
uint32_t crc;
/** Uncompressed size (modulo 2^32) */
uint32_t len;
} __attribute__ (( packed ));
extern struct image_type gzip_image_type __image_type ( PROBE_NORMAL );
#endif /* _IPXE_GZIP_H */
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