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-rw-r--r--lib/tdb/common/tdb.c11
-rw-r--r--lib/tdb/common/tdb_private.h1
2 files changed, 12 insertions, 0 deletions
diff --git a/lib/tdb/common/tdb.c b/lib/tdb/common/tdb.c
index a2ae187f57..6256a05d04 100644
--- a/lib/tdb/common/tdb.c
+++ b/lib/tdb/common/tdb.c
@@ -1000,6 +1000,17 @@ bool tdb_write_all(int fd, const void *buf, size_t count)
return true;
}
+bool tdb_add_off_t(tdb_off_t a, tdb_off_t b, tdb_off_t *pret)
+{
+ tdb_off_t ret = a + b;
+
+ if ((ret < a) || (ret < b)) {
+ return false;
+ }
+ *pret = ret;
+ return true;
+}
+
#ifdef TDB_TRACE
static void tdb_trace_write(struct tdb_context *tdb, const char *str)
{
diff --git a/lib/tdb/common/tdb_private.h b/lib/tdb/common/tdb_private.h
index 406fc5f7f2..c37246f150 100644
--- a/lib/tdb/common/tdb_private.h
+++ b/lib/tdb/common/tdb_private.h
@@ -282,4 +282,5 @@ void tdb_header_hash(struct tdb_context *tdb,
uint32_t *magic1_hash, uint32_t *magic2_hash);
unsigned int tdb_old_hash(TDB_DATA *key);
size_t tdb_dead_space(struct tdb_context *tdb, tdb_off_t off);
+bool tdb_add_off_t(tdb_off_t a, tdb_off_t b, tdb_off_t *pret);
#endif /* TDB_PRIVATE_H */