Function does_charset_match

src/iocore/cache/HttpTransactCache.cc:688–692

Match request Accept-Charset with response Content-Type. Extract the response charset from the Content-Type field - the charset is after the semicolon. Loop through the charsets in the request's Accept-Charset field. If the Accept-Charset value is a wildcard, do not attempt to match. Otherwise match and note the highest q value. If after the loop the q value is -1, indicating no match,

*/
static inline bool
does_charset_match(char *charset1, char *charset2)
{
  return (is_asterisk(charset1) || is_empty(charset1) || (strcasecmp(charset1, charset2) == 0));
}

float
HttpTransactCache::calculate_quality_of_accept_charset_match(MIMEField *accept_field, MIMEField *content_field,