compress.c File Reference

#include <linux/crypto.h>
#include "ubifs.h"

Go to the source code of this file.

Functions
void	ubifs_compress (const void *in_buf, int in_len, void *out_buf, int *out_len, int *compr_type)
int	ubifs_decompress (const void *in_buf, int in_len, void *out_buf, int *out_len, int compr_type)
int __init	ubifs_compressors_init (void)
void	ubifs_compressors_exit (void)

Variables
struct ubifs_compressor *	ubifs_compressors [UBIFS_COMPR_TYPES_CNT]

Function Documentation

void ubifs_compress	(	const void *	in_buf,
		int	in_len,
		void *	out_buf,
		int *	out_len,
		int *	compr_type
	)

ubifs_compress - compress data. : data to compress : length of the data to compress : output buffer where compressed data should be stored : output buffer length is returned here : type of compression to use on enter, actually used compression type on exit

This function compresses input buffer of length and stores the result in the output buffer and the resulting length in . If the input buffer does not compress, it is just copied to the . The same happens if is UBIFS_COMPR_NONE or if compression error occurred.

Note, if the input buffer was not compressed, it is copied to the output buffer and UBIFS_COMPR_NONE is returned in .

Definition at line 95 of file compress.c.

void ubifs_compressors_exit

(

void

)

ubifs_compressors_exit - de-initialize UBIFS compressors.

Definition at line 246 of file compress.c.

int __init ubifs_compressors_init

(

void

)

ubifs_compressors_init - initialize UBIFS compressors.

This function initializes the compressor which were compiled in. Returns zero in case of success and a negative error code in case of failure.

Definition at line 223 of file compress.c.

int ubifs_decompress	(	const void *	in_buf,
		int	in_len,
		void *	out_buf,
		int *	out_len,
		int	compr_type
	)

ubifs_decompress - decompress data. : data to decompress : length of the data to decompress : output buffer where decompressed data should : output length is returned here : type of compression

This function decompresses data from buffer into buffer . The length of the uncompressed data is returned in . This functions returns %0 on success or a negative error code on failure.

Definition at line 147 of file compress.c.

Variable Documentation

struct ubifs_compressor* ubifs_compressors[UBIFS_COMPR_TYPES_CNT]

Definition at line 75 of file compress.c.