Sorry,
char data; is actually char ID;
I added char data; by hand after copy-pasting the code snippet in the
mail. Application code is correct.
Víctor M. Palacio Tárrega escribió:
You are absolutely right. buff remains from another workaround and
should be eliminated.
About data, should be defined as char foo[<data_lenght>]; where I use
only 1 or 4 as data_lenght.
Below are included the calls to read_data() function I'm using.
I'm doing something nasty with data conversion, or is just fine for you?
Thanks a lot,
Code:
int value;
char data;
//.........................................
ioc_unix.read_data(&ID,1);
std::cout<<"command received: " << (int)ID << std::endl;
//Get value
switch(ID)
{
case 0: //speed
//..........................
break;
case 1: //RPM
if(ioc_unix.read_data((char*)value,4) !=-1){
//......................................
klaus triendl escribió:
Víctor M. Palacio Tárrega schrieb:
Code:
int NetworkCommandManager::read_data(char* data, int len)
{
if (len>256){
std::cerr << "Cannot read more than 256 bytes" << std::endl;
return -1;
}
gsize n;
char buff[256];
std::cout<< "to read "<< len << " bytes" << std::endl;
n = ::read(read_fd,data,len); //workaround
//ioc_net->read(data,(gsize)len,n); //seg faulting call
std::cout<< "readed "<< n << " bytes" << std::endl;
if (n == len)
return 0;
else
return -1; }
You reserve a static buffer 'buff' that you never use. Instead, you pass
'data' to the read() function. How big is 'data' passed to read_data()?
Klaus
--
//*Víctor M. Palacio Tárrega*//
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