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authorAndrew Tridgell <tridge@samba.org>2006-08-24 07:20:32 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 14:16:39 -0500
commit66337169f13592c85b15d18115893f5c8a53f866 (patch)
treec624fdd7c9eb246aa63206d2308f3080c16ea09e /source4/lib/ldb/ldb_tdb
parenta524e8cdded5c0975583d7db97de8c61d95b670c (diff)
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r17771: add a comment explaing the odd cast
(This used to be commit 47e695ed88d364a7d423e804fe5340006ebf7c18)
Diffstat (limited to 'source4/lib/ldb/ldb_tdb')
-rw-r--r--source4/lib/ldb/ldb_tdb/ldb_index.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/source4/lib/ldb/ldb_tdb/ldb_index.c b/source4/lib/ldb/ldb_tdb/ldb_index.c
index c6feeaeb42..b628c31b09 100644
--- a/source4/lib/ldb/ldb_tdb/ldb_index.c
+++ b/source4/lib/ldb/ldb_tdb/ldb_index.c
@@ -61,6 +61,12 @@ static int ldb_list_find(const void *needle,
int r;
test_i = (min_i + max_i) / 2;
+ /* the following cast looks strange, but is
+ correct. The key to understanding it is that base_p
+ is a pointer to an array of pointers, so we have to
+ dereference it after casting to void **. The strange
+ const in the middle gives us the right type of pointer
+ after the dereference (tridge) */
r = comp_fn(needle, *(void * const *)(base_p + (size * test_i)));
if (r == 0) {
/* scan back for first element */