Support new --append option.

[rsync/rsync.git] / match.c

diff --git a/match.c b/match.c
index 00a38aa..e42abca 100644 (file)
--- a/match.c
+++ b/match.c
@@ -23,6 +23,7 @@ extern int verbose;
 extern int am_server;
 extern int do_progress;
 extern int checksum_seed;
+extern int append_mode;
 
 int updating_basis_file;
 
@@ -330,6 +331,21 @@ void match_sums(int f, struct sum_struct *s, struct map_struct *buf, OFF_T len)
 
        sum_init(checksum_seed);
 
+       if (append_mode) {
+               OFF_T j = 0;
+               for (j = CHUNK_SIZE; j < s->flength; j += CHUNK_SIZE) {
+                       sum_update(map_ptr(buf, last_match, CHUNK_SIZE),
+                                  CHUNK_SIZE);
+                       last_match = j;
+               }
+               if (last_match < s->flength) {
+                       int32 len = s->flength - last_match;
+                       sum_update(map_ptr(buf, last_match, len), len);
+                       last_match = s->flength;
+               }
+               s->count = 0;
+       }
+
        if (len > 0 && s->count > 0) {
                build_hash_table(s);
 
@@ -343,7 +359,7 @@ void match_sums(int f, struct sum_struct *s, struct map_struct *buf, OFF_T len)
        } else {
                OFF_T j;
                /* by doing this in pieces we avoid too many seeks */
-               for (j = CHUNK_SIZE; j < len; j += CHUNK_SIZE)
+               for (j = last_match + CHUNK_SIZE; j < len; j += CHUNK_SIZE)
                        matched(f, s, buf, j, -2);
                matched(f, s, buf, len, -1);
        }