Function ap_rationalize_mtime

server/protocol.c:174–189

* Return the latest rational time from a request/mtime (modification time) * pair. We return the mtime unless it's in the future, in which case we * return the current time. We use the request time as a reference in order * to limit the number of calls to time(). We don't check for futurosity * unless the mtime is at least as new as the reference. */

 * unless the mtime is at least as new as the reference.
 */
AP_DECLARE(apr_time_t) ap_rationalize_mtime(request_rec *r, apr_time_t mtime)
{
    apr_time_t now;

    /* For all static responses, it's almost certain that the file was
     * last modified before the beginning of the request.  So there's
     * no reason to call time(NULL) again.  But if the response has been
     * created on demand, then it might be newer than the time the request
     * started.  In this event we really have to call time(NULL) again
     * so that we can give the clients the most accurate Last-Modified.  If we
     * were given a time in the future, we return the current time - the
     * Last-Modified can't be in the future.
     */
    now = (mtime < r->request_time) ? r->request_time : apr_time_now();
    return (mtime > now) ? now : mtime;
}

/* Get a line of protocol input, including any continuation lines
 * caused by MIME folding (or broken clients) if fold != 0, and place it