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#include "stdio.h"
#include "unistd.h"
extern char *confdir;
extern char *datadir;
void encode(char *in,char *out)
{
int seed[16]={1,7,3,9,34,1,24,1,
8,25,14,65,2,7,4,1};
int i=0,val;
FILE *fpin;
FILE *fpout;
chdir(datadir);
fpin=fopen(in,"rb");
chdir(confdir);
fpout=fopen(out,"wb");
chdir(datadir);
if (fpin==0 || fpout==0) return;
do{
val=fgetc(fpin);
if (!feof(fpin)) {
fputc(int('A'+(((val+seed[i%16])>>4)%16)),fpout);
fputc(int('A'+((val+seed[i%16])%16)),fpout);
i++;
} /* if */
}while(!feof(fpin));
fclose(fpout);
fclose(fpin);
} /* encode */
void decode(char *in,char *out)
{
// int seed[32]={1,1,7,7,3,3,9,9,34,34,1,1,24,24,1,1,
// 8,8,25,25,14,14,65,65,2,2,7,7,4,4,1,1};
int seed[16]={1,7,3,9,34,1,24,1,
8,25,14,65,2,7,4,1};
int i=0,val1,val2;
FILE *fpin;
FILE *fpout;
chdir(datadir);
fpin=fopen(in,"rb");
chdir(confdir);
fpout=fopen(out,"wb");
chdir(datadir);
if (fpin==0 || fpout==0) return;
do{
val1=fgetc(fpin);
val2=fgetc(fpin);
if (!feof(fpin)) {
fputc(int( (int(val1-'A')<<4) + int(val2-'A') - seed[(i%16)] ),fpout);
i++;
} /* if */
}while(!feof(fpin));
fclose(fpout);
fclose(fpin);
} /* decode */
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