/**
* Receive code words through a UNIX socket.
*
* From the code words, retrieve the original data flow.
*
* @param UNIX socket descriptor
* @param pointer to data flow
*
* @return -1 in case of error, the size (in bytes) of data flow otherwise
*/
static int
receiveMessage (int desc, char *message)
{
static int stop = 0;
int cw_size = 0;
int data_size = 0;
char cw[MAX_MSG_CODE];
memset (cw, '\0', MAX_MSG_CODE * sizeof (char));
struct sockaddr_un remote_addr;
unsigned int addr_size = sizeof (struct sockaddr_un);
if (stop)
{
return (0);
}
else
{
cw_size = recvfrom (desc, cw, MAX_MSG_CODE, 0,
(struct sockaddr *) &remote_addr, &addr_size);
if (cw_size == 0)
{
return (0);
}
else if (cw_size > 0)
{
decoding (cw, cw_size, message, &data_size);
return (data_size);
}
return (-1);
}
}
//overloaded to accept plain string code
string Morse::decode_morse(string code)
{
stringstream buffer(code);
string code_to_decipher, decoded = "";
while (buffer >> code_to_decipher){
decoded += " " + decoding(root, code_to_decipher);
}
return decoded;
}
int main(int argc, char * argv[]){
if (argc > 1) {
getEncodeFlags(argc, argv);
encode();
flushBits();
}
else {
decoding();
decode();
}
freeArray();
return 1;
}
//the parser for reading from file
string Morse::decode_morse(ifstream& fin)
{
if (!fin.good()){
return "ERROR: The file cannot be opened";
}
stringstream buffer;
buffer << fin.rdbuf();
string code_to_decipher, decoded = "";
while (buffer >> code_to_decipher){
decoded += " " + decoding(root, code_to_decipher);
}
return decoded;
}
void coding_test() {
char* encode;
int encode_len;
char* decode;
int decode_len;
if (encoding("abcd", 4, &encode, &encode_len) < 0) {
return ;
}
printf("%.*s\n", encode_len - 4, encode + 4);
if (decoding(encode + 4, encode_len - 4, &decode, &decode_len) < 0) {
return ;
}
printf("%.*s\n", decode_len, decode);
}
int main(void)
{
FILE *file=fopen("input.txt","r");
int cases;
if(file ==NULL)
exit(1);
fscanf(file, "%d", &cases);
while(cases--)
{
int num;
char str[MAX];
fscanf(file, "%d %s", &num, str);
if(num==0)
encoding(str);
else
decoding(str);
}
}
void main()
{
int i, x, s, start, finish, value, count;
unsigned long int j;
unsigned int mask=1;
long int error, ferror;
double progress, b;
srand(1977);
mono_table();
printf("\nEnter start SNR: ");
scanf("%d", &start);
printf("\nEnter finish SNR: ");
scanf("%d", &finish);
printf("\nseq_num: ");
scanf("%d", &seq_num);
/*
printf("\nPlease input the number of k*p-bit sequence: ");
for(i=0;i<8;i++)
{
printf("when SNR=%d, input the seqnum=",(start+i));
scanf("%d", &seq_num[i]);
}
*/
/*
//*******debug*********
printf("\nstart=%d finish=%d seq_num=%d \n\n",start,finish,seq_num);
//******************
*/ for(SNR=start;SNR<=finish;SNR++)
{
N0=(1.0/(float(k)/float(n)))/pow(10.0, float(SNR)/10.0);
sgm=sqrt(N0/2);
b=1.0;
error=0;
//ferror=0;
for(j=1;j<=seq_num;j++)
{
//printf("\n\n*************For the %dth frame*************:\n", j);
//Generate binary message
for(i=0;i<k*p;i++)
bi_message[i]=rand()%2;
//Convert to nonbinary
for(i=0;i<k;i++)
message[i]=bi_message[p*i]+2*bi_message[p*i+1]+4*bi_message[p*i+2];
encoder();
//Convert the codeword into binary
for(i=0;i<n;i++)
{
value=codeword[i];
mask=1;
for(x=0;x<p;x++) //for(m=p-1;m>=0;m--)
{
if((value & mask)>0)
bi_codeword[p*i+x]=1;
else
bi_codeword[p*i+x]=0;
mask=mask<<1;
}
}
modulation();
channel();
/////////To be done?////////////
demodulation();
decoding();
//Number of errors calculation
//error=0;
for(i=0;i<p*n;i++)
if(bi_codeword[i]!=dec_codeword[i])
error++;
/*
if(error!=0)
ferror++;
*/
progress=(double)(j*100)/(double)seq_num;
BER=(double)(error)/(double)(n*p*j);
//FER=(double)(ferror)/(double)(j),
printf("Progress=%0.1f, SNR=%2.1d, Bit Errors=%2.1d, BER=%E\r", progress, SNR, error, BER);
// printf(" Progress=%0.1f,dectect=%d\r",progress,dectec);
}
BER=(double)error/(double)(n*p*seq_num);
//FER=(double)(ferror)/(double)(seq_num);
printf("Progress=%0.1f, SNR=%2.1d, Bit Errors=%2.1d, BER=%E\n",progress, SNR, error, BER);
// printf(" Progress=%0.1f,dectect=%d\r",progress,dectec);
}
/* if( dectec==0 )
printf("\n\nit's over!!");
else
printf("\n\n error!!!!!!!!!!");
*/
getchar();
getchar();
}
//接收其他client传过来的 URL list
void communication::recv()
{
char buffer[MAXLINE];
char whole_text [MAXLINE*5];
int listenfd=socket(AF_INET,SOCK_STREAM,0);//定义socket，指向ipv4地址的字节流套接口
struct sockaddr_in serverAddr;
memset(&serverAddr,0,sizeof(serverAddr));//sockAddr_in 进行初始化
serverAddr.sin_family=AF_INET;
serverAddr.sin_addr.s_addr=htonl(INADDR_ANY);
serverAddr.sin_port=htons(PORT);
if(bind(listenfd,(struct sockaddr *) &serverAddr,sizeof(serverAddr))==-1)
{
printf("There is an error during binding\n");
return ;
}
else
{
printf("Bind successfully!!!\n");
}
//对listenfd进行监听，从最初建立时的主动套接口（用于进行connect的套接口）转化为被动套接口（接受连接）
listen(listenfd,100);
int connectfd;
socklen_t addrlen;
struct sockaddr_in connectAddr;
memset(&connectAddr,0,sizeof(connectAddr));
printf("Be ready to accept a connection!\n");
// 实例化一个url checker
htmlParser * checker = new htmlParser();
while(1)
{
connectfd=accept(listenfd,(struct sockaddr * )&connectAddr,&addrlen);//接受client端一个请求的socket
char addr_buffer [100];
//const char * clientAddress=inet_ntop(AF_INET,&connectAddr.sin_addr,addr_buffer,sizeof(addr_buffer));//获取客户端的ip地址
int n;
//接收其他client传过来的json文本，并存入whole_text
whole_text [0] = '\0'; // that is important
while((n=read(connectfd,buffer,MAXLINE))>0)
{
buffer[n] = '\0';
strcat(whole_text , buffer);
}
//解析whole_text,convert to url Queue
queue<url *> urlQueue = decoding(whole_text);
cout<<"Received\t"<<urlQueue.size()<<" urls\t"<<"From\t"<<connectAddr.sin_port<<endl;
//Add to url Frontier
if (urlQueue.size()>0)
{
url * newurl = NULL;
while(!urlQueue.empty())
{
newurl = urlQueue.front();
//check url
if(newurl!=NULL&&newurl->isValid()
&&!checker->urlseen(newurl)&&checker->urlfilter(newurl))
{
//Add to url frontier
pthread_mutex_lock(&frontier_mutex);
frontier->pushurl(newurl);
pthread_mutex_unlock(&frontier_mutex);
}
urlQueue.pop();
}
pthread_mutex_unlock(&frontier_mutex);
}
close(connectfd);
}
close(listenfd);
}
void saje::findConfig() {
QFile file(homeDir()+".config/Saje/accounts.xml");
if (file.open(QIODevice::ReadOnly | QIODevice::Text))
decoding(file);
}
int main(int argc, char *argv[])
{
QString filePath, extenCheck; // file path /extension check variable
QString ioFileName[2]; // input/output file name
QString mode[2]; //compress or decompress mode -c/-d
if(argc == 5 || argc == 3) //compress
{
ioFileName[0] = argv[2]; //input file name
//qDebug() << ioFileName[0];
mode[0] = argv[1]; //-c
if(argc == 5 && mode[0] == "-c")
{
mode[1] = argv[3]; //-o
if(mode[1] == "-o")
{
ioFileName[1] = argv[4]; //output file name
extenCheck = ioFileName[1].right(5);
if(extenCheck == ".huff")
{
encoding(ioFileName);//encoding function
}
else
{
qDebug() << "\nExtensao nao .huff\n";
showInfo(); //informations about compressing and decompressing
}
}
}
else if(argc == 3 && mode[0] == "-c")
{
ioFileName[1] = "oName";
encoding(ioFileName); //decoding function
}
else
{
showInfo();
}
}
else if(argc == 4 || argc == 2) //decompress
{
ioFileName[0] = argv[1];
extenCheck = ioFileName[0].right(5);
if(extenCheck == ".huff")
{
if(argc == 4)
{
mode[0] = argv[2]; //-d
if(mode[0] == "-d")
{
filePath = argv[3];//home/user/path
QDir savingPath(filePath);
if(savingPath.exists())
{
ioFileName[1] = filePath;
decoding(ioFileName);
}
else
{
qDebug() << "\nDiretorio inexistente\n";
}
}
else
{
showInfo();
}
}
else
{
ioFileName[1] = "oName";
decoding(ioFileName);
}
}
else
{
qDebug() << "\nExtensao nao .huff\n";
showInfo();
}
}
else
{
showInfo();
}
return 0;
}
void main()
{
int i, x, s,value, count;
float start,finish;
unsigned long int j;
unsigned int mask=1;
long int error, ferror;
double progress, b;
FILE *fp;
if((fp=fopen("data_(63,31)m=5.txt","a"))==NULL)
{
printf("Can't open the data.txt\n");
exit(0);
}
fclose(fp);
srand(1977);
printf("\nEnter start SNR: ");
scanf("%f", &start);
printf("\nEnter finish SNR: ");
scanf("%f", &finish);
printf("\nseq_num: ");
scanf("%d", &seq_num);
for(SNR=start;SNR<=finish;SNR++)
{
N0=(1.0/(float(k)/float(n)))/pow(10.0, SNR/10.0);
sgm=sqrt(N0/2);
b=1.0;
error=0;
//ferror=0;
for(j=1;j<=seq_num;j++)
{
//printf("\n\n*************For the %dth frame*************:\n", j);
//Generate binary message
for(i=0;i<k*p;i++)
bi_message[i]=rand()%2;
//Convert to nonbinary
for(i=0;i<k;i++)
message[i]=bi_message[p*i]+2*bi_message[p*i+1]+4*bi_message[p*i+2]+8*bi_message[p*i+3]
+16*bi_message[p*i+4]+32*bi_message[p*i+5];
/* //******debug*******
message[0]=63; message[1]=15; message[2]=45; message[3]=45; message[4]=20; message[5]=22; message[6]=34;
message[7]=44; message[8]=8; message[9]=51; message[10]=29; message[11]=23; message[12]=5; message[13]=41;
message[14]=20;
//*******************
*/
encoder();
//Convert the codeword into binary
for(i=0;i<n;i++)
{
value=codeword[i];
mask=1;
for(x=0;x<p;x++) //for(m=p-1;m>=0;m--)
{
if((value & mask)>0)
bi_codeword[p*i+x]=1;
else
bi_codeword[p*i+x]=0;
mask=mask<<1;
}
}
modulation();
channel();
/////////To be done?////////////
demodulation();
decoding();
//Number of errors calculation
//error=0;
for(i=0;i<p*n;i++)
if(bi_codeword[i]!=dec_codeword[i])
error++;
/*
if(f_error_temp==1)
printf("\nerror=%d\n",error);
f_error_temp=0;
*/ /*
if(error!=0)
ferror++;
*/
progress=(double)(j*100)/(double)seq_num;
BER=(double)(error)/(double)(n*p*j);
//FER=(double)(ferror)/(double)(j),
printf("Progress=%0.1f, SNR=%2.1f, Bit Errors=%2.1d, BER=%E\r", progress, SNR, error, BER);
// printf(" Progress=%0.1f,dectect=%d\r",progress,dectec);
}
BER=(double)error/(double)(n*p*seq_num);
//FER=(double)(ferror)/(double)(seq_num);
printf("Progress=%0.1f, SNR=%2.1f, Bit Errors=%2.1d, BER=%E\n",progress, SNR, error, BER);
// printf(" Progress=%0.1f,dectect=%d\r",progress,dectec);
fp=fopen("data_(63,31)m=5.txt","a");
fprintf(fp,"Progress=%0.1f, SNR=%2.1f, Bit Errors=%2.1d, BER=%E\n",progress, SNR, error, BER);
fclose(fp);
}
getchar();
getchar();
}
