gcc/zlib/deflate.c

1151     register Bytef *scan = s->window + s->strstart; /* current string */
1169     register ush scan_start = *(ushf*)scan;
1170     register ush scan_end   = *(ushf*)(scan+best_len-1);
1173     register Byte scan_end1  = scan[best_len-1];
1174     register Byte scan_end   = scan[best_len];
1212         /* It is not necessary to compare scan[2] and match[2] since they are
1221         Assert(scan[2] == match[2], "scan[2]?");
1222         scan++, match++;
1224         } while (*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
1225                  *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
1226                  *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
1227                  *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
1228                  scan < strend);
1231         /* Here, scan <= window+strstart+257 */
1232         Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
1233         if (*scan == *match) scan++;
1235         len = (MAX_MATCH - 1) - (int)(strend-scan);
1236         scan = strend - (MAX_MATCH-1);
1242             *match            != *scan     ||
1243             *++match          != scan[1])      continue;
1247          * It is not necessary to compare scan[2] and match[2] since they
1251         scan += 2, match++;
1252         Assert(*scan == *match, "match[2]?");
1258         } while (*++scan == *++match && *++scan == *++match &&
1259                  *++scan == *++match && *++scan == *++match &&
1260                  *++scan == *++match && *++scan == *++match &&
1261                  *++scan == *++match && *++scan == *++match &&
1262                  scan < strend);
1264         Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
1266         len = MAX_MATCH - (int)(strend - scan);
1267         scan = strend - MAX_MATCH;
1276             scan_end = *(ushf*)(scan+best_len-1);
1278             scan_end1  = scan[best_len-1];
1279             scan_end   = scan[best_len];
1299     register Bytef *scan = s->window + s->strstart; /* current string */
1317     if (match[0] != scan[0] || match[1] != scan[1]) return MIN_MATCH-1;
1321      * It is not necessary to compare scan[2] and match[2] since they
1325     scan += 2, match += 2;
1326     Assert(*scan == *match, "match[2]?");
1332     } while (*++scan == *++match && *++scan == *++match &&
1333              *++scan == *++match && *++scan == *++match &&
1334              *++scan == *++match && *++scan == *++match &&
1335              *++scan == *++match && *++scan == *++match &&
1336              scan < strend);
1338     Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
1340     len = MAX_MATCH - (int)(strend - scan);
1865     Bytef *scan, *strend;   /* scan goes up to strend for length of run */
1883             scan = s->window + s->strstart - 1;
1884             prev = *scan;
1885             if (prev == *++scan && prev == *++scan && prev == *++scan) {
1888                 } while (prev == *++scan && prev == *++scan &&
1889                          prev == *++scan && prev == *++scan &&
1890                          prev == *++scan && prev == *++scan &&
1891                          prev == *++scan && prev == *++scan &&
1892                          scan < strend);
1893                 s->match_length = MAX_MATCH - (int)(strend - scan);
1897             Assert(scan <= s->window+(uInt)(s->window_size-1), "wild scan");