bt_matchfinder: use 4-byte hashing for trees

[wimlib] / src / xpress_compress.c

diff --git a/src/xpress_compress.c b/src/xpress_compress.c
index ba7a9af7272ecb3510d6a6ab04e7fec0319dd3cd..776de7cdc4c33032f82a75d7d4333f041df36217 100644 (file)
--- a/src/xpress_compress.c
+++ b/src/xpress_compress.c
@@ -907,7 +907,7 @@ xpress_find_matches(struct xpress_compressor * restrict c,
        const u8 * const in_begin = in;
        const u8 *in_next = in_begin;
        struct lz_match *cache_ptr = c->match_cache;
        const u8 * const in_begin = in;
        const u8 *in_next = in_begin;
        struct lz_match *cache_ptr = c->match_cache;

-       u32 next_hash = 0;
+       u32 next_hashes[2] = {};

        u32 max_len = in_nbytes;
        u32 nice_len = min(max_len, c->nice_match_length);
 
        u32 max_len = in_nbytes;
        u32 nice_len = min(max_len, c->nice_match_length);
 


@@ -935,7 +935,7 @@ xpress_find_matches(struct xpress_compressor * restrict c,
                                                   max_len,
                                                   nice_len,
                                                   c->max_search_depth,
                                                   max_len,
                                                   nice_len,
                                                   c->max_search_depth,

-                                                  &next_hash,
+                                                  next_hashes,

                                                   &best_len,
                                                   cache_ptr);
                cache_ptr->length = cache_ptr - matches;
                                                   &best_len,
                                                   cache_ptr);
                cache_ptr->length = cache_ptr - matches;


@@ -965,7 +965,7 @@ xpress_find_matches(struct xpress_compressor * restrict c,
                                                             max_len,
                                                             nice_len,
                                                             c->max_search_depth,
                                                             max_len,
                                                             nice_len,
                                                             c->max_search_depth,

-                                                            &next_hash);
+                                                            next_hashes);

                                cache_ptr->length = 0;
                                cache_ptr->offset = *in_next++;
                                cache_ptr++;
                                cache_ptr->length = 0;
                                cache_ptr->offset = *in_next++;
                                cache_ptr++;