preread           250 ext/charconv/charconv.c     int preread = 0;
preread           266 ext/charconv/charconv.c         preread = Scm_Getz(inbuf, bufsiz, fromPort);
preread           267 ext/charconv/charconv.c         if (preread <= 0) {
preread           273 ext/charconv/charconv.c         guessed = guess->proc(inbuf, preread, guess->data);
preread           288 ext/charconv/charconv.c     if (preread > 0) {
preread           290 ext/charconv/charconv.c         cinfo->ptr = inbuf + preread;