// adapted from http://stackoverflow.com/questions/2302969/how-to-implement-char-ftoafloat-num-without-sprintf-library-function-i/2303011#2303011
char* ftoa(double num, char* str)
{
int whole_part = num;
int digit;
int log_value = dlog10(num), index = log_value;
long wt =0;
double fraction_part = num - whole_part;
// go in reverse order
int i = 0;
while (whole_part != 0) {
int remainder = whole_part % 10;
str[i++] = remainder + '0';
whole_part = whole_part / 10;
}
strrev(str);
index = log_value + 1;
str[index] = '.';
double tmp1 = fraction_part, tmp =0;
//Extract the fraction part from num
for( int i= 1; i < PRECISION; i++)
{
wt = 10;
tmp = tmp1 * wt;
digit = tmp;
//Store digit in string
str[++index] = digit + 48; // ASCII value of digit = digit + 48
tmp1 = tmp - digit;
}
return str;
}
int FileService::on_read(Socket *socket)
{
dlog10("into int FileService::on_read(Socket *socket)");
FifoBuffer::Packet packet;
while (socket->get_one_packet(&packet))
{
char *data = (char*) packet.data;
bigheader *header = (bigheader*) data;
int cmd = ntohs(header->cmd);
// printf("cmd = %d \n", cmd);
if (cmd == BIG_OPEN_REQ)
{
//不验证，直接默认全部通过
bigloginrspall resp;
socket->send((const char*) &resp, sizeof(bigloginrspall));
}
else if (cmd == BIG_WRITE_REQ)
{
bigwritereq * req = (bigwritereq*) (data + sizeof(bigheader));
printf("write file %s \n", req->path);
WriteFile((const char*) (req->path), (const char*) ((char*) req + sizeof(bigwritereq)),
ntohl(req->data_len));
bigwriterspall resp(0);
socket->send((const char*) &resp, sizeof(resp));
}
else if (cmd == BIG_READ_REQ)
{
bigreadreq *req = (bigreadreq*) (data + sizeof(bigheader));
int len = 0;
char *buffer = ReadFile((const char*) (req->path), len);
if (buffer == NULL)
{
bigreadrspall resp(1, 0);
socket->send((const char*) &resp, sizeof(resp));
}
else
{
bigreadrspall resp(0, len);
char *data = (char*) malloc(sizeof(bigreadrspall) + len);
if (data == NULL)
{
resp.rsp.result = 1;
resp.rsp.data_len = 0;
socket->send((const char*) &resp, sizeof(resp));
}
else
{
memcpy(data, (void*) &resp, sizeof(bigreadrspall));
memcpy(data + sizeof(bigreadrspall), data, len);
socket->send((const char*) &resp, sizeof(resp) + len);
free(data);
}
}
}
else if (cmd == BIG_CLOSE_REQ)
{
}
else
{
printf("cmd = %d , can not parse \n", cmd);
}
}
return FSM_END;
}
