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/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
* University of Szeged, Hungary
*
* For licensing information, see the file 'LICENCE' in the
* jffs2 directory.
*/
#ifndef __JFFS2_COMPR_H__
#define __JFFS2_COMPR_H__
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include "linux/jffs2.h"
#define CONFIG_JFFS2_ZLIB
#define CONFIG_JFFS2_RTIME
#define JFFS2_RUBINMIPS_PRIORITY 10
#define JFFS2_DYNRUBIN_PRIORITY 20
#define JFFS2_RTIME_PRIORITY 50
#define JFFS2_ZLIB_PRIORITY 60
#define JFFS2_LZO_PRIORITY 80
#define JFFS2_COMPR_MODE_NONE 0
#define JFFS2_COMPR_MODE_PRIORITY 1
#define JFFS2_COMPR_MODE_SIZE 2
#define JFFS2_COMPR_MODE_FAVOURLZO 3
#define kmalloc(a,b) malloc(a)
#define kfree(a) free(a)
#ifndef GFP_KERNEL
#define GFP_KERNEL 0
#endif
#define vmalloc(a) malloc(a)
#define vfree(a) free(a)
#define printk(...) fprintf(stderr,__VA_ARGS__)
#define KERN_EMERG
#define KERN_ALERT
#define KERN_CRIT
#define KERN_ERR
#define KERN_WARNING
#define KERN_NOTICE
#define KERN_INFO
#define KERN_DEBUG
struct list_head {
struct list_head *next, *prev;
};
void jffs2_set_compression_mode(int mode);
int jffs2_get_compression_mode(void);
int jffs2_set_compression_mode_name(const char *mode_name);
int jffs2_enable_compressor_name(const char *name);
int jffs2_disable_compressor_name(const char *name);
int jffs2_set_compressor_priority(const char *name, int priority);
struct jffs2_compressor {
struct list_head list;
int priority; /* used by prirority comr. mode */
const char *name;
char compr; /* JFFS2_COMPR_XXX */
int (*compress)(unsigned char *data_in, unsigned char *cpage_out,
uint32_t *srclen, uint32_t *destlen);
int (*decompress)(unsigned char *cdata_in, unsigned char *data_out,
uint32_t cdatalen, uint32_t datalen);
int usecount;
int disabled; /* if seted the compressor won't compress */
unsigned char *compr_buf; /* used by size compr. mode */
uint32_t compr_buf_size; /* used by size compr. mode */
uint32_t stat_compr_orig_size;
uint32_t stat_compr_new_size;
uint32_t stat_compr_blocks;
uint32_t stat_decompr_blocks;
};
int jffs2_register_compressor(struct jffs2_compressor *comp);
int jffs2_unregister_compressor(struct jffs2_compressor *comp);
int jffs2_compressors_init(void);
int jffs2_compressors_exit(void);
uint16_t jffs2_compress(unsigned char *data_in, unsigned char **cpage_out,
uint32_t *datalen, uint32_t *cdatalen);
/* If it is setted, a decompress will be called after every compress */
void jffs2_compression_check_set(int yesno);
int jffs2_compression_check_get(void);
int jffs2_compression_check_errorcnt_get(void);
char *jffs2_list_compressors(void);
char *jffs2_stats(void);
/* Compressor modules */
/* These functions will be called by jffs2_compressors_init/exit */
#ifdef CONFIG_JFFS2_ZLIB
int jffs2_zlib_init(void);
void jffs2_zlib_exit(void);
#endif
#ifdef CONFIG_JFFS2_RTIME
int jffs2_rtime_init(void);
void jffs2_rtime_exit(void);
#endif
#ifdef WITH_LZO
int jffs2_lzo_init(void);
void jffs2_lzo_exit(void);
#endif
#endif /* __JFFS2_COMPR_H__ */
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