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#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <math.h>
#include <sys/time.h>
struct DFEntryType {
char field[17];
int spf;
int fp;
char type;
};
#define NDF 15
#define SCOUNT 0
#define FCOUNT 1
#define SINE 2
#define SSINE 3
#define COS 4
#define TIME 5
#define EXTRA 6
struct DFEntryType df[NDF] = {
{"scount", 1, -1, 'f'},
{"fcount", 20, -1, 'f'},
{"sine", 20, -1, 'f'},
{"ssine", 1, -1, 'f'},
{"cos", 20, -1, 'f'},
{"time", 20, -1, 'd'},
{"E0", 20, -1, 'f'},
{"E1", 20, -1, 'f'},
{"E2", 20, -1, 'f'},
{"E3", 20, -1, 'f'},
{"E4", 20, -1, 'f'},
{"E5_test", 20, -1, 'f'},
{"E6_test", 20, -1, 'f'},
{"E7[m]", 20, -1, 'f'},
{"E8^2", 20, -1, 'f'}
};
int main() {
char dirfilename[120];
char tmpstr[150];
FILE *fpf;
int i, count = 0;
int j;
float x;
double dx;
struct timeval tv;
sprintf(dirfilename, "%d.dm", time(NULL));
printf("Writing dirfile %s\n", dirfilename);
printf("The fields are:\n");
for (i=0; i<NDF; i++) {
printf("%16s %2d samples per frame\n", df[i].field, df[i].spf);
}
if (mkdir(dirfilename, 00755) < 0) {
perror("dirfile mkdir()");
exit(0);
}
sprintf(tmpstr,"%s/format", dirfilename);
fpf = fopen(tmpstr,"w");
/* make curfile */
unlink("dm.lnk");
symlink(dirfilename, "dm.lnk");
sleep(1);
for (i=0; i<NDF; i++) {
fprintf(fpf,"%s RAW %c %d\n", df[i].field, df[i].type, df[i].spf);
fflush(fpf);
usleep(100000);
sprintf(tmpstr,"%s/%s", dirfilename, df[i].field);
df[i].fp = open(tmpstr, O_WRONLY|O_CREAT, 00644);
}
fprintf(fpf,"CONST1 CONST FLOAT32 16.4\nCONST2 CONST DOUBLE 3.14159\n"
"STR1 STRING Test\\ String\n");
fprintf(fpf,"META cos metaC CONST FLOAT64 3.291882\n"
"META cos metaS STRING Test_String\n");
fprintf(fpf, "cos/units STRING ^o\ncos/quantity STRING Angle\n");
fclose(fpf);
printf("starting loop\n");
while (1) {
/* write 'fcount' */
for (i=0; i<df[FCOUNT].spf; i++) {
x = count*df[FCOUNT].spf+i;
write(df[FCOUNT].fp, &x, sizeof(float));
}
/* write 'sine' */
for (i=0; i<df[SINE].spf; i++) {
dx = count*df[SINE].spf+i;
x = sin(2.0*M_PI*dx/100.0);
write(df[SINE].fp, &x, sizeof(float));
}
/* write 'ssine' */
for (i=0; i<df[SSINE].spf; i++) {
dx = count*df[SSINE].spf+i;
x = sin(2.0*M_PI*dx/100.0);
write(df[SSINE].fp, &x, sizeof(float));
}
/* write 'cos' */
for (i=0; i<df[COS].spf; i++) {
dx = count*df[COS].spf+i;
x = cos(2.0*M_PI*dx/100.0);
write(df[COS].fp, &x, sizeof(float));
}
gettimeofday(&tv, 0);
for (i=0; i<df[TIME].spf; i++) {
dx = (double)tv.tv_sec +( double)(tv.tv_usec)/1000000.0 + (double)i/100.0;
write(df[TIME].fp, &dx, sizeof(double));
}
/* write extras */
for (j=6; j<NDF; j++) {
for (i=0; i<df[j].spf; i++) {
x = (double)rand()/(double)RAND_MAX;
write(df[j].fp, &x, sizeof(float));
}
}
/* write 'count' */
x = count;
write(df[SCOUNT].fp, &x, sizeof(float));
printf("writing frame %d \r", count);
fflush(stdout);
usleep(200000);
count++;
}
return (42);
}
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