sip_uri_isTokenchar
static int sip_uri_isTokenchar(char **, char *);
while (scan < uend && sip_uri_isTokenchar(&scan, uend))
if (sip_uri_isTokenchar(&scan, uend)) {
while (sip_uri_isTokenchar(&scan, uend))
while (sip_uri_isTokenchar(&scan, uend))