alg_sig.c File Reference

#include <dlfcn.h>
#include <alg_sig.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

Go to the source code of this file.

Macros
#define	GALOIS_SINGLE_MULTIPLY   "galois_single_multiply"
#define	GALOIS_UNINIT   "galois_uninit_field"

Functions
galois_single_multiply_func	get_galois_multi_func (void *handle)
void	stub_galois_uninit_field (int w)
galois_uninit_field_func	get_galois_uninit_func (void *handle)
void *	get_jerasure_sohandle ()
int	load_gf_functions (void *sohandle, struct jerasure_mult_routines *routines)
static alg_sig_t *	init_alg_sig_w8 (void *jerasure_sohandle, int sig_len)
static alg_sig_t *	init_alg_sig_w16 (void *jerasure_sohandle, int sig_len)
alg_sig_t *	init_alg_sig (int sig_len, int gf_w)
void	destroy_alg_sig (alg_sig_t *alg_sig_handle)
static int	compute_w8_alg_sig_32 (alg_sig_t *alg_sig_handle, char *buf, int len, char *sig)
static int	compute_w16_alg_sig_64 (alg_sig_t *alg_sig_handle, char *buf, int len, char *sig)
static int	compute_w16_alg_sig_32 (alg_sig_t *alg_sig_handle, char *buf, int len, char *sig)
static int	compute_alg_sig_32 (alg_sig_t *alg_sig_handle, char *buf, int len, char *sig)
static int	compute_alg_sig_64 (alg_sig_t *alg_sig_handle, char *buf, int len, char *sig)
int	compute_alg_sig (alg_sig_t *alg_sig_handle, char *buf, int len, char *sig)

Variables
int	valid_gf_w [] = { 8, 16, -1 }
int	valid_pairs [][2] = { { 8, 32}, {16, 32}, {16, 64}, {-1, -1} }

Macro Definition Documentation

GALOIS_SINGLE_MULTIPLY

#define GALOIS_SINGLE_MULTIPLY   "galois_single_multiply"

Definition at line 31 of file alg_sig.c.

GALOIS_UNINIT

#define GALOIS_UNINIT   "galois_uninit_field"

Definition at line 32 of file alg_sig.c.

Function Documentation

compute_alg_sig()

int compute_alg_sig	(	alg_sig_t *	alg_sig_handle,
		char *	buf,
		int	len,
		char *	sig
	)

Definition at line 425 of file alg_sig.c.

References compute_alg_sig_32(), and compute_alg_sig_64().

compute_alg_sig_32()

static int compute_alg_sig_32 ( alg_sig_t *  alg_sig_handle, char *  buf, int  len, char *  sig  )

static

Definition at line 406 of file alg_sig.c.

References compute_w16_alg_sig_32(), and compute_w8_alg_sig_32().

Referenced by compute_alg_sig().

compute_alg_sig_64()

static int compute_alg_sig_64 ( alg_sig_t *  alg_sig_handle, char *  buf, int  len, char *  sig  )

static

Definition at line 417 of file alg_sig.c.

References compute_w16_alg_sig_64().

Referenced by compute_alg_sig().

compute_w16_alg_sig_32()

static int compute_w16_alg_sig_32 ( alg_sig_t *  alg_sig_handle, char *  buf, int  len, char *  sig  )

static

This is the loop to optimize. It is currently optimized enough : using Horner's alg., shortened mult. tables, and other tricks.

Definition at line 359 of file alg_sig.c.

Referenced by compute_alg_sig_32().

compute_w16_alg_sig_64()

static int compute_w16_alg_sig_64 ( alg_sig_t *  alg_sig_handle, char *  buf, int  len, char *  sig  )

static

This is the loop to optimize. It is currently optimized enough : using Horner's alg., shortened mult. tables, and other tricks.

Definition at line 304 of file alg_sig.c.

Referenced by compute_alg_sig_64().

compute_w8_alg_sig_32()

static int compute_w8_alg_sig_32 ( alg_sig_t *  alg_sig_handle, char *  buf, int  len, char *  sig  )

static

This is the loop to optimize. It is currently optimized enough : using Horner's alg., shortened mult. tables, and other tricks.

Definition at line 275 of file alg_sig.c.

Referenced by compute_alg_sig_32().

destroy_alg_sig()

void destroy_alg_sig

(

alg_sig_t *

alg_sig_handle

)

Definition at line 246 of file alg_sig.c.

get_galois_multi_func()

galois_single_multiply_func get_galois_multi_func

(

void *

handle

)

Definition at line 36 of file alg_sig.c.

References GALOIS_SINGLE_MULTIPLY.

Referenced by load_gf_functions().

get_galois_uninit_func()

galois_uninit_field_func get_galois_uninit_func

(

void *

handle

)

Definition at line 52 of file alg_sig.c.

References GALOIS_UNINIT.

Referenced by load_gf_functions().

get_jerasure_sohandle()

void* get_jerasure_sohandle

(

)

Definition at line 67 of file alg_sig.c.

Referenced by init_alg_sig().

init_alg_sig()

alg_sig_t* init_alg_sig	(	int	sig_len,
		int	gf_w
	)

Definition at line 216 of file alg_sig.c.

References get_jerasure_sohandle(), init_alg_sig_w16(), init_alg_sig_w8(), and valid_pairs.

init_alg_sig_w16()

static alg_sig_t* init_alg_sig_w16 ( void *  jerasure_sohandle, int  sig_len  )

static

Definition at line 153 of file alg_sig.c.

References load_gf_functions().

Referenced by init_alg_sig().

init_alg_sig_w8()

static alg_sig_t* init_alg_sig_w8 ( void *  jerasure_sohandle, int  sig_len  )

static

Definition at line 96 of file alg_sig.c.

References load_gf_functions().

Referenced by init_alg_sig().

load_gf_functions()

int load_gf_functions	(	void *	sohandle,
		struct jerasure_mult_routines *	routines
	)

It is possible that the underlying Jerasure implementation is old (pre-jerasure.org). If so, there is not an uninit function, so these tests will fail.

Since nothing is using alg_sig at the moment, we stub the uninit function to unblock the tests. Once we plug the internal GF functions into alg_sig, this can jsut go away.

Definition at line 72 of file alg_sig.c.

References get_galois_multi_func(), get_galois_uninit_func(), and stub_galois_uninit_field().

Referenced by init_alg_sig_w16(), and init_alg_sig_w8().

stub_galois_uninit_field()

void stub_galois_uninit_field

(

int

w

)

Definition at line 50 of file alg_sig.c.

Referenced by load_gf_functions().

Variable Documentation

valid_gf_w

int valid_gf_w[] = { 8, 16, -1 }

Definition at line 33 of file alg_sig.c.

valid_pairs

int valid_pairs[][2] = { { 8, 32}, {16, 32}, {16, 64}, {-1, -1} }

Definition at line 34 of file alg_sig.c.

Referenced by init_alg_sig().