1258     register Bytef *strend = s->window + s->strstart + MAX_MATCH - 1;  local
1262     register Bytef *strend = s->window + s->strstart + MAX_MATCH;  local
1318                  scan < strend);
1325         len = (MAX_MATCH - 1) - (int)(strend-scan);
1326         scan = strend - (MAX_MATCH-1);
1352                  scan < strend);
1356         len = MAX_MATCH - (int)(strend - scan);
1357         scan = strend - MAX_MATCH;
1392     register Bytef *strend = s->window + s->strstart + MAX_MATCH;  local
1426              scan < strend);
1430     len = MAX_MATCH - (int)(strend - scan);
2063     Bytef *scan, *strend;   /* scan goes up to strend for length of run */  local
2084                 strend = s->window + s->strstart + MAX_MATCH;
2090                          scan < strend);
2091                 s->match_length = MAX_MATCH - (uInt)(strend - scan);