Problem with pointer copy in C
- by Stefano Salati
I radically re-edited the question to explain better my application, as the xample I made up wasn't correct in many ways as you pointed out:
I have one pointer to char and I want to copy it to another pointer and then add a NULL character at the end (in my real application, the first string is a const, so I cannot jsut modify it, that's why I need to copy it).
I have this function, "MLSLSerialWriteBurst" which I have to fill with some code adapt to my microcontroller.
tMLError MLSLSerialWriteBurst( unsigned char slaveAddr,
unsigned char registerAddr,
unsigned short length,
const unsigned char *data )
{
unsigned char *tmp_data;
tmp_data = data;
*(tmp_data+length) = NULL;
// this function takes a tmp_data which is a char* terminated with a NULL character ('\0')
if(EEPageWrite2(slaveAddr,registerAddr,tmp_data)==0)
return ML_SUCCESS;
else
return ML_ERROR;
}
I see there's a problem here: tha fact that I do not initialize tmp_data, but I cannot know it's length.
