function parameter by reference

[leoalvesmachado]

Hi everyone,
I have the following function, I use it to read tags from a xml file. It returns true when it is able to read and false when something fails. I also update the values of "node_start" and "node_end" so I can keep track of the values read from outside. Here is the code:

bool getNode(char *begin, char *end, const char *name, char *node_start, char *node_end)
{
	string starttag = "<",endtag = "<";
	starttag += name;
	starttag += ">";
	endtag += "/";endtag += name;endtag += ">";
	char *_node_start = strstr(begin,starttag.c_str());
	if((_node_start == NULL)||(_node_start >= end))return false;
	char *_node_end = strstr(_node_start+starttag.length(),endtag.c_str());
	if((_node_end == NULL)||(_node_end >= end))return false;

	node_start = _node_start;
	node_end = _node_end + endtag.length();
	return true;
}

The problem I'm having is the values of node_start and node_end that aren't being passed as reference, but by value - they do not update their values outside the function. Here is where I call the function:

char *node_start = NULL,*node_end = NULL,*begin = &(*beginFile),*end = &(*endFile);
while(getNode(begin,end,"class",node_start,node_end))
	{
		//process information (I need node_start and node_end here)
	}

I'm sure I'm missing something kind of obvious, but I just can't see it. Can you help me?

Thanks in advance