Function extractParam

SIP/SIPParse.cpp:313–322

Extract a SIP parameter from a string containing a list of parameters. They look like ;param1=value;param2=value ... The input string need not start exactly at the beginning of the list. The paramid is specified with the semi-colon and =, example: ";tag="

// The input string need not start exactly at the beginning of the list.
// The paramid is specified with the semi-colon and =, example: ";tag="
static string extractParam(const char *pp, const char *paramid)
{
	const int taghdrlen = strlen(paramid);	// strlen(";tag=");
	if (const char *tp = strstr(pp,paramid)) {
		pp += taghdrlen;
		const char *ep = strchr(pp,';');
		return ep ? string(pp,ep-tp) : string(pp);
	}
	return string("");	// Not found.
}

void SipPreposition::rebuild()
{