mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-19 05:07:56 +00:00
50 lines
1.0 KiB
C
50 lines
1.0 KiB
C
|
#include <stdio.h>
|
||
|
|
#include "fixed.h"
|
||
|
|
|
||
|
|
void encode_rs_8(data_t *data, data_t *parity,int pad);
|
||
|
|
int decode_rs_8(data_t *data, int *eras_pos, int no_eras, int pad);
|
||
|
|
|
||
|
|
|
||
|
|
int dump(char *name,unsigned char *addr,int len)
|
||
|
|
{
|
||
|
|
int i,j;
|
||
|
|
fprintf(stderr,"Dump of %s\n",name);
|
||
|
|
for(i=0;i<len;i+=16)
|
||
|
|
{
|
||
|
|
fprintf(stderr," %04x :",i);
|
||
|
|
for(j=0;j<16&&(i+j)<len;j++) fprintf(stderr," %02x",addr[i+j]);
|
||
|
|
for(;j<16;j++) fprintf(stderr," ");
|
||
|
|
fprintf(stderr," ");
|
||
|
|
for(j=0;j<16&&(i+j)<len;j++) fprintf(stderr,"%c",addr[i+j]>=' '&&addr[i+j]<0x7f?addr[i+j]:'.');
|
||
|
|
fprintf(stderr,"\n");
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc,char **argv)
|
||
|
|
{
|
||
|
|
unsigned char in[255];
|
||
|
|
unsigned char out[255];
|
||
|
|
|
||
|
|
|
||
|
|
srandom(getpid());
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for(i=0;i<223;i++) in[i]=i;
|
||
|
|
|
||
|
|
encode_rs_8(&in[0],&in[223],0);
|
||
|
|
bcopy(in,out,255);
|
||
|
|
dump("data with parity",out,255);
|
||
|
|
|
||
|
|
for(i=0;i<16;i++) out[random()%255]^=0xff;
|
||
|
|
|
||
|
|
dump("data with errors added",out,255);
|
||
|
|
|
||
|
|
decode_rs_8(out,NULL,0,0);
|
||
|
|
|
||
|
|
dump("data after error correction",out,223);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
}
|