int main(int argc, char *argv[])
{
struct sharknado
{
int a;//4
char b;//1
float c;
};
struct sharknado s={0x0f000000,'a',ReverseFloat(2.0f)};
int sockfd, portno, n;
struct sockaddr_in serv_addr;
struct hostent *server;
char buffer[256];
if (argc < 3) {
fprintf(stderr,"usage %s hostname port\n", argv[0]);
exit(0);
}
portno = atoi(argv[2]);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
_error("ERROR opening socket");
server = gethostbyname(argv[1]);
if (server == NULL) {
fprintf(stderr,"ERROR, no such host\n");
exit(0);
}
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)server->h_addr,
(char *)&serv_addr.sin_addr.s_addr,
server->h_length);
serv_addr.sin_port = htons(portno);
if (connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) < 0)
_error("ERROR connecting");
// printf("Please enter the message: ");
// bzero(buffer,256);
// fgets(buffer,255,stdin);
//The only difference between send() and write() is the presence of flags. With zero flags parameter, send() is equivalent to write()
n = write(sockfd,(char *)&s, sizeof(s));
if (n < 0)
_error("ERROR writing to socket");
bzero(buffer,256);
n = read(sockfd,buffer,255);
if (n < 0)
_error("ERROR reading from socket");
printf("%s\n",buffer);
return 0;
}
int main(int argc, char** argv) {
FILE *inf;
FILE *outf;
long dx_ofs=40; // index for dx,type float
long dy_ofs=44;
long dz_ofs=48;
long w1_ofs=198; //index for wave 1, type short
long w2_ofs=200;
long w3_ofs=202;
long w4_ofs=204;
long w5_ofs=206;
float dx,dy,dz;
short w1,w2,w3,w4,w5=0;
/*
* char mode[]="0664";
*/
if(argc==1) {
printf("%s: please supply an input filename.\n",argv[0]);
exit(1);
}
if(argc==2) {
printf("%s: please supply an output filename.\n",argv[0]);
exit(1);
}
/* if (chmod(argv[1],strtol(mode,0,8) < 0)) {
fprintf(stderr,"%s: error in chmod(%s,%s) - %d (%s)\n",
argv[0], argv[1], mode, errno, strerror(errno));
exit(1);
} */
if (inf=fopen(argv[1],"r")) {
fseek(inf,dx_ofs,SEEK_SET);
fread(&dx,sizeof(float),1,inf);
fread(&dy,sizeof(float),1,inf);
fread(&dz,sizeof(float),1,inf);
fseek(inf,w1_ofs,SEEK_SET);
fread(&w1,sizeof(short),1,inf);
fread(&w2,sizeof(short),1,inf);
fread(&w3,sizeof(short),1,inf);
fread(&w4,sizeof(short),1,inf);
fread(&w5,sizeof(short),1,inf);
fclose(inf);
}
else {
fprintf(stderr,"%s: could not open input file %s.\n",argv[0],argv[1]);
exit(1);
}
if(fabs(dx)>1) {
// printf("fabs(dx) is %.5f\n",fabs(dx));
dx=ReverseFloat(dx);
dy=ReverseFloat(dy);
dz=ReverseFloat(dz);
w1=ReverseShort(w1);
w2=ReverseShort(w2);
w3=ReverseShort(w3);
w4=ReverseShort(w4);
w5=ReverseShort(w5);
}
printf("Data: %f %f %f %i %i %i %i %i \n",dx,dy,dz,w1,w2,w3,w4,w5);
// printf("Data-rev: %f %f %f %i %i %i %i %i \n",ReverseFloat(dx),ReverseFloat(dy),ReverseFloat(dz),ReverseShort(w1),w2,w3,w4,w5);
if (outf=fopen(argv[2],"r+")) {
fseek(outf,dx_ofs,SEEK_SET);
fwrite(&dx,sizeof(float),1,outf);
fwrite(&dy,sizeof(float),1,outf);
fwrite(&dz,sizeof(float),1,outf);
fseek(outf,w1_ofs,SEEK_SET);
fwrite(&w1,sizeof(short),1,outf);
fwrite(&w2,sizeof(short),1,outf);
fwrite(&w3,sizeof(short),1,outf);
fwrite(&w4,sizeof(short),1,outf);
fwrite(&w5,sizeof(short),1,outf);
fclose(outf);
}
else {
fprintf(stderr,"%s: could not open output file %s.\n",argv[0],argv[2]);
exit(1);
}
return(0);
}
