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#include <config.h>
#include <bsdcompat.h>
#include <protocols/dumprestore.h>
#ifdef HAVE_LZO
#include <lzo/lzo1x.h>
#endif /* HAVE_LZO */
#ifndef _transformation_H
#define _transformation_H
/*
* Compression/encryption hooks.
*
* Open questions:
* 1. should it be a failure if compress/decompress is called and we DON'T have the code included?
*/
typedef struct transformation {
int enc;
union {
int initval__;
#ifdef HAVE_LZO
struct {
lzo_align_t __LZO_MMODEL *LZO_WorkMem;
} lzo;
#endif /* HAVE_LZO */
#ifdef HAVE_ZLIB
struct {
int complvl;
} zlib;
#endif /* HAVE_ZLIB */
#ifdef HAVE_BZLIB
struct {
int complvl;
} bzlib;
#endif /* HAVE_ZLIB */
} state;
/*
* The name of the compression/encryption algorithm, for
* display purposes.
*/
const char *name;
/*
* Is this mandatory even if the size of the buffer increases?
* As a general rule compression is optional * and encryption is
* mandatory.
*/
int mandatory;
/*
* Initialize the system.
* (mode: 1 = compress/encrypt, 0 = decompress/decrypt)
*/
int (*initialize) (struct transformation *xform, int mode);
/*
* Shut down the system
*/
int (*shutdown) (struct transformation *xform);
/*
* Do anything necessary after forking the process.
*/
int (*startNewTape) (struct transformation *xform,
struct tapebuf *tpbin, unsigned long *destlen);
/*
* The dump process is master-slave with the actual
* disk and dump tape access handled by the slave processes.
* This method performs any initialization required by
* the latter process. (E.g., some encryption libraries
* must be reinitialized.)
*/
int (*startDiskIOProcess) (struct transformation *xform);
/*
* Clean up everything before the slave process ends.
*/
int (*endDiskIOProcess) (struct transformation *xform);
/*
* Compress/encrypt buffer.
*/
int (*compress) (struct transformation *xform, struct tapebuf *, unsigned long *destlen,
const char *src, int srclen);
/*
* Decompress/decrypt buffer.
*/
int (*decompress) (struct transformation *xform, struct tapebuf *, unsigned long *destlen,
const char *src, int srclen, char **reason);
} Transformation;
extern Transformation transformation_null;
#ifdef HAVE_LZO
#define HAVE_BLOCK_TRANSFORMATION 1
extern Transformation *transformation_lzo_factory(int enc);
#endif /* HAVE_ZLIB */
#ifdef HAVE_ZLIB
#define HAVE_BLOCK_TRANSFORMATION 1
extern Transformation *transformation_zlib_factory(int enc, int complvl);
#endif /* HAVE_ZLIB */
#ifdef HAVE_BZLIB
#define HAVE_BLOCK_TRANSFORMATION 1
extern Transformation *transformation_bzlib_factory(int enc, int complvl);
#endif /* HAVE_BZLIB */
void quit(const char *fmt, ...);
#endif /* _transformation_H */
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