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Merged in dachary/jerasure/wip-galois-init (pull request #22) 

add galois_init_default_field error code
master
Kevin Greenan 2014-06-08 16:36:03 -07:00
parent b8221e7d75 1b30a37c9f
commit 4b62ab21e1
2 changed files with 30 additions and 19 deletions
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2
include/galois.h
View File

@ -46,7 +46,7 @@
extern "C" {
#endif
extern void galois_init_default_field(int w);
extern int galois_init_default_field(int w);
extern void galois_change_technique(gf_t *gf, int w);
extern int galois_single_multiply(int a, int b, int w);

47
src/galois.c
View File

@ -47,6 +47,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "galois.h"
@ -168,24 +169,34 @@ gf_t* galois_init_composite_field(int w,
return gfp;
}
void galois_init_default_field(int w)
int galois_init_default_field(int w)
{
if (gfp_array[w] == NULL) {
gfp_array[w] = (gf_t*)malloc(sizeof(gf_t));
if(gfp_array[w] == NULL)
return ENOMEM;
if (!gf_init_easy(gfp_array[w], w))
return EINVAL;
}
return 0;
}
static void galois_init(int w)
{
if (w <= 0 || w > 32) {
fprintf(stderr, "ERROR -- cannot init default Galois field for w=%d\n", w);
exit(1);
}
if (gfp_array[w] == NULL) {
gfp_array[w] = (gf_t*)malloc(sizeof(gf_t));
if (gfp_array[w] == NULL) {
fprintf(stderr, "ERROR -- cannot allocate memory for Galois field w=%d\n", w);
exit(1);
}
}
if (!gf_init_easy(gfp_array[w], w)) {
switch (galois_init_default_field(w)) {
case ENOMEM:
fprintf(stderr, "ERROR -- cannot allocate memory for Galois field w=%d\n", w);
exit(1);
break;
case EINVAL:
fprintf(stderr, "ERROR -- cannot init default Galois field for w=%d\n", w);
exit(1);
break;
}
}
@ -243,7 +254,7 @@ int galois_single_multiply(int x, int y, int w)
if (x == 0 || y == 0) return 0;
if (gfp_array[w] == NULL) {
galois_init_default_field(w);
galois_init(w);
}
if (w <= 32) {
@ -260,7 +271,7 @@ int galois_single_divide(int x, int y, int w)
if (y == 0) return -1;
if (gfp_array[w] == NULL) {
galois_init_default_field(w);
galois_init(w);
}
if (w <= 32) {
@ -278,7 +289,7 @@ void galois_w08_region_multiply(char *region, /* Region to multiply */
int add)
{
if (gfp_array[8] == NULL) {
galois_init_default_field(8);
galois_init(8);
}
gfp_array[8]->multiply_region.w32(gfp_array[8], region, r2, multby, nbytes, add);
}
@ -290,7 +301,7 @@ void galois_w16_region_multiply(char *region, /* Region to multiply */
int add)
{
if (gfp_array[16] == NULL) {
galois_init_default_field(16);
galois_init(16);
}
gfp_array[16]->multiply_region.w32(gfp_array[16], region, r2, multby, nbytes, add);
}
@ -303,7 +314,7 @@ void galois_w32_region_multiply(char *region, /* Region to multiply */
int add)
{
if (gfp_array[32] == NULL) {
galois_init_default_field(32);
galois_init(32);
}
gfp_array[32]->multiply_region.w32(gfp_array[32], region, r2, multby, nbytes, add);
}
@ -311,7 +322,7 @@ void galois_w32_region_multiply(char *region, /* Region to multiply */
void galois_w8_region_xor(void *src, void *dest, int nbytes)
{
if (gfp_array[8] == NULL) {
galois_init_default_field(8);
galois_init(8);
}
gfp_array[8]->multiply_region.w32(gfp_array[32], src, dest, 1, nbytes, 1);
}
@ -319,7 +330,7 @@ void galois_w8_region_xor(void *src, void *dest, int nbytes)
void galois_w16_region_xor(void *src, void *dest, int nbytes)
{
if (gfp_array[16] == NULL) {
galois_init_default_field(16);
galois_init(16);
}
gfp_array[16]->multiply_region.w32(gfp_array[16], src, dest, 1, nbytes, 1);
}
@ -327,7 +338,7 @@ void galois_w16_region_xor(void *src, void *dest, int nbytes)
void galois_w32_region_xor(void *src, void *dest, int nbytes)
{
if (gfp_array[32] == NULL) {
galois_init_default_field(32);
galois_init(32);
}
gfp_array[32]->multiply_region.w32(gfp_array[32], src, dest, 1, nbytes, 1);
}