diff options
| author | Mark Wielaard <mark@klomp.org> | 2013-06-08 23:57:16 +0200 |
|---|---|---|
| committer | David Tardon <dtardon@redhat.com> | 2013-06-10 05:02:01 +0000 |
| commit | 18b843fccda2ba452673290965dfe69ff8ce6445 (patch) | |
| tree | 268edd2a869493986550fd668ce5c59377942b9e /src | |
| parent | 1cee75488205c82e33360ea3c9656e880919e372 (diff) | |
Don't use overlapping memcpy in heapextract.
Calling memcpy with source and destination overlapping might result in
unexpected results. In this case it was also useless since it was trying
to copy an element that was going to be removed immediately afterwards.
Change-Id: I20852eed68aaf956c8597442a986d37ff21e106a
Reviewed-on: https://gerrit.libreoffice.org/4202
Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/fingerprint.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/fingerprint.c b/src/fingerprint.c index e17d83e..428b8df 100644 --- a/src/fingerprint.c +++ b/src/fingerprint.c @@ -254,7 +254,8 @@ static int heapextract(table_t * t, entry_t * item) p = &(t->heap[0]); memcpy(item, p, sizeof(entry_t)); - memcpy(&(t->heap[0]), &(t->heap[t->size - 1]), sizeof(entry_t)); + if (t->size > 1) + memcpy(&(t->heap[0]), &(t->heap[t->size - 1]), sizeof(entry_t)); siftdown(t, t->size, 0); t->size--; |