LZ4_prepareTable(dict, 0, tableType);
+ /* We always increment the offset by 64 KB, since, if the dict is longer,
+ * we truncate it to the last 64k, and if it's shorter, we still want to
+ * advance by a whole window length so we can provide the guarantee that
+ * there are only valid offsets in the window, which allows an optimization
+ * in LZ4_compress_fast_continue() where it uses noDictIssue even when the
+ * dictionary isn't a full 64k. */
+
if ((dictEnd - p) > 64 KB) p = dictEnd - 64 KB;
- base = p - dict->currentOffset;
+ base = dictEnd - 64 KB - dict->currentOffset;
dict->dictionary = p;
dict->dictSize = (U32)(dictEnd - p);
- dict->currentOffset += dict->dictSize;
+ dict->currentOffset += 64 KB;
dict->tableType = tableType;
if (dictSize < (int)HASH_UNIT) {