// add a new string to the hashtable
void hashtable_add(hashtable_t *hashtable, const char *s) {
char* tmp = strdup(s);
int sum = sumchar(tmp);
int hash = sum % (hashtable->size);
struct __list_node *new_node = (struct __list_node *)malloc (sizeof(struct __list_node));
new_node->s = tmp;
//list_add(&hashtable->hashtable[hash],tmp);
if (hashtable->hashtable[hash] == NULL) {
list_init(hashtable->hashtable[hash]);
hashtable->hashtable->head = new_node;
}else{
new_node->next = hashtable->hashtable[hash]->head;
hashtable->hashtable->head = new_node;
}
free(tmp);
}
int main(int argc, char **argv)
{
char deck[54];
int i, j;
int mode = 0; /* default mode is encode, non-zero is decode */
for (i = 0; i < 54; i++)
deck[i] = i + 1;
if (argc > 1 && argv[1][0] == '-')
{
if(argv[1][1] == 'd')
{
mode = 1;
}
else if (argv[1][1] == 'e')
{
mode = 0;
}
else usage();
}
else usage();
argc--;
argv++;
/* do key */
while (argc-- > 1)
{
char *ap = *++argv;
while (*ap)
{
int c = *ap++;
char tmp[53];
if (c >= 'a' && c <= 'z')
c = c - 'a' + 'A';
if (c >= 'A' && c <= 'Z')
{
c = c - 'A' + 1;
step(deck);
i = 0;
for (j = c; j < 53; j++)
tmp[i++] = deck[j];
for (j = 0; j < c; j++)
tmp[i++] = deck[j];
for (j = 0; j < 53; j++)
deck[j] = tmp[j];
}
}
}
j = 0;
while ((i = getalpha()) != 0)
{
putchar(mode ? sumchar(i, -step(deck)) : sumchar(i, step(deck)));
j++;
if (j % 5 == 0)
{
if (j == 50)
{
j = 0;
putchar('\n');
}
else
putchar (' ');
}
}
j = j % 5;
if (j)
while (j < 5)
{
i = 'X';
putchar(mode ? sumchar(i, -step(deck)) : sumchar(i, step(deck)));
j++;
}
printf("\n");
return EXIT_SUCCESS;
}
void scamp2fb(FILE *input, FILE *output) /* includefile */
{
FILE *fpou;
unsigned char *gulp,*spew,*flip,sumof[256];
float realtime;
double junk;
char string[80],schead[640];
int i,j,k,doit,idump=0,nread,opened=0,s,f,
ntotal=0,nclipped=0,ichans,sum,clipmax;
//if (scamp_chans != nchans) exit(0);
/* allocated space to store incoming and outgoing data blocks */
gulp = (unsigned char *) malloc(scamp_block_size * sizeof(unsigned char));
flip = (unsigned char *) malloc(scamp_block_size * sizeof(unsigned char));
spew = (unsigned char *) malloc(8*scamp_block_size * sizeof(unsigned char));
if (headerfile) {
/* write output ASCII header file */
fpou=open_file("head","w");
fprintf(fpou,"Original SCAMP file: %s\n",inpfile);
fprintf(fpou,"Sample time (us): %f\n",tsamp*1.0e6);
fprintf(fpou,"Center freq (MHz): %f\n",fch1+(float)scamp_chans*foff/2.0);
fprintf(fpou,"Channel band (kHz): %f\n",fabs(foff)*1000.0);
fprintf(fpou,"Time stamp (MJD): %18.12f\n",tstart);
fprintf(fpou,"RA (J2000): %f\n",src_raj);
fprintf(fpou,"DEC (J2000): %f\n",src_dej);
fclose(fpou);
}
if (clip_threshold>0.0) {
/*
clip samples which deviate by more than clip_threshold
sigma times the mean. For these data, mean=nchan/2 and
sigma = sqrt(nchan)
*/
clipmax=(float)(scamp_chans)/2.0+clip_threshold*sqrt((float)scamp_chans);
for (i=0;i<256;i++) sumof[i]=sumchar(i); /* look-up table of byte sums */
}
while (!feof(input)) {
/* read ina 48k block of data */
nread=fread(gulp,1,scamp_block_size,input);
/* do the band inversion here if necessary
DEDISPERSE requires that the first channel is the highest frequency */
if (invert_band) {
for (i=0; i<scamp_block_size; i++) flip[i]=flipchar(gulp[i]);
for (i=0; i<scamp_block_size/scamp_chans; i++) {
s=i*scamp_chans; f=(i+1)*scamp_chans; k=0;
for (j=s;j<f;j++) {
gulp[j]=flip[f-1-k];
k++;
}
}
}
/* now do clipping if necessary */
if (clip_threshold>0.0) {
ichans=sum=j=0;
for (i=0; i<scamp_block_size; i++) {
/* keep track of sum over each byte (8 channels!) */
sum+=sumof[gulp[i]];
ichans+=8;
if (ichans==scamp_chans) {
/* decide whether to clip this sample */
if (sum>clipmax) {
nclipped++;
for (k=j; k<=i; k++) gulp[k]=0;
}
ntotal++;
j=i+1;
sum=0;
ichans=0;
}
}
}
if (scamp_rawdata) {
/* read off the header from the data and proceed as normal */
fread(schead,sizeof(schead),1,input);
} else {
/* extra (FORTRAN!) junk that gets written after each block */
fread(&junk,8,1,input);
}
/* decide whether to write out this block */
realtime=tsamp*idump;
if ((doit=process(realtime,start_time,final_time))==-1) break;
if (doit) {
if (idump%1024 == 0) {
if (!opened) {
open_log("filterbank.monitor");
opened=1;
}
sprintf(string,"time:%.1fs",realtime);
update_log(string);
}
/* output as single bit (default) or single byte data */
switch (obits) {
case 1:
idump+=8*nread/scamp_chans;
i=1;
/* write out only segments not in scamp.ignore */
for (j=1;j<=nread;j++) {
if (!scamp_ignore[i]) fwrite(&gulp[j-1],1,1,output);
i++;
if (i>scamp_chans/8) i=1;
}
/*fwrite(gulp,1,nread,output);*/
break;
case 8:
k=0;
for (i=0; i<nread; i++) {
for (j=0;j<8;j++) {
spew[k]=gulp[i]&1;
gulp[i]>>=1;
k++;
if (!(k%scamp_chans)) idump++;
}
}
fwrite(spew,1,8*scamp_block_size,output);
break;
}
}
}
/* write out clipping statistics to ASCII file clip.stats */
if (clip_threshold>0) {
fpou=open_file("clip.stats","w");
fprintf(fpou,"threshold %.1f sigma (sum = %d)\n",
clip_threshold,clipmax);
fprintf(fpou,"samples clipped = %d (total = %d)\n",
nclipped,ntotal);
fclose(fpou);
}
free(gulp);free(flip);free(spew);
}