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authorSimo Sorce <idra@samba.org>2002-04-07 22:04:39 +0000
committerSimo Sorce <idra@samba.org>2002-04-07 22:04:39 +0000
commit68518222a7cbc5621d8b51e691e3725ab576c52b (patch)
treecfbdf561b5846cde847942afcab1c53b582e63e5
parent4f804664801fcc9a9f78bb166f429173c0c85397 (diff)
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uint32 store and fectch functions, a signed int is not enough sometimes
(This used to be commit f07b2b3d5295202e0c8e530c43fae6d458b2cf2a)
-rw-r--r--source3/tdb/tdbutil.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/source3/tdb/tdbutil.c b/source3/tdb/tdbutil.c
index 793b44d89d..f7cebb58d5 100644
--- a/source3/tdb/tdbutil.c
+++ b/source3/tdb/tdbutil.c
@@ -112,6 +112,68 @@ int tdb_store_int32(TDB_CONTEXT *tdb, char *keystr, int32 v)
}
/****************************************************************************
+ Fetch a uint32 value by a arbitrary blob key, return -1 if not found.
+ Output is uint32 in native byte order.
+****************************************************************************/
+
+BOOL tdb_fetch_uint32_byblob(TDB_CONTEXT *tdb, char *keyval, size_t len, uint32 *value)
+{
+ TDB_DATA key, data;
+
+ key.dptr = keyval;
+ key.dsize = len;
+ data = tdb_fetch(tdb, key);
+ if (!data.dptr || data.dsize != sizeof(uint32))
+ return False;
+
+ *value = IVAL(data.dptr,0);
+ SAFE_FREE(data.dptr);
+ return True;
+}
+
+/****************************************************************************
+ Fetch a uint32 value by string key, return -1 if not found.
+ Output is uint32 in native byte order.
+****************************************************************************/
+
+BOOL tdb_fetch_uint32(TDB_CONTEXT *tdb, char *keystr, uint32 *value)
+{
+ return tdb_fetch_uint32_byblob(tdb, keystr, strlen(keystr) + 1, value);
+}
+
+/****************************************************************************
+ Store a uint32 value by an arbitary blob key, return 0 on success, -1 on failure.
+ Input is uint32 in native byte order. Output in tdb is in little-endian.
+****************************************************************************/
+
+BOOL tdb_store_uint32_byblob(TDB_CONTEXT *tdb, char *keystr, size_t len, uint32 value)
+{
+ TDB_DATA key, data;
+ uint32 v_store;
+ BOOL ret = True;
+
+ key.dptr = keystr;
+ key.dsize = len;
+ SIVAL(&v_store, 0, value);
+ data.dptr = (void *)&v_store;
+ data.dsize = sizeof(uint32);
+
+ if (tdb_store(tdb, key, data, TDB_REPLACE) == -1)
+ ret = False;
+
+ return ret;
+}
+
+/****************************************************************************
+ Store a uint32 value by string key, return 0 on success, -1 on failure.
+ Input is uint32 in native byte order. Output in tdb is in little-endian.
+****************************************************************************/
+
+BOOL tdb_store_uint32(TDB_CONTEXT *tdb, char *keystr, uint32 value)
+{
+ return tdb_store_uint32_byblob(tdb, keystr, strlen(keystr) + 1, value);
+}
+/****************************************************************************
Store a buffer by a null terminated string key. Return 0 on success, -1
on failure.
****************************************************************************/
@@ -179,6 +241,40 @@ int32 tdb_change_int32_atomic(TDB_CONTEXT *tdb, char *keystr, int32 *oldval, int
}
/****************************************************************************
+ Atomic unsigned integer change. Returns old value. To create, set initial value in *oldval.
+****************************************************************************/
+
+BOOL tdb_change_uint32_atomic(TDB_CONTEXT *tdb, char *keystr, uint32 *oldval, uint32 change_val)
+{
+ uint32 val;
+ BOOL ret = False;
+
+ if (tdb_lock_bystring(tdb, keystr) == -1)
+ return False;
+
+ if (!tdb_fetch_uint32(tdb, keystr, &val)) {
+ if (tdb_error(tdb) != TDB_ERR_NOEXIST)
+ goto err_out;
+
+ val = *oldval;
+
+ } else {
+ *oldval = val;
+ val += change_val;
+ }
+
+ if (!tdb_store_uint32(tdb, keystr, val))
+ goto err_out;
+
+ ret = True;
+
+ err_out:
+
+ tdb_unlock_bystring(tdb, keystr);
+ return ret;
+}
+
+/****************************************************************************
Useful pair of routines for packing/unpacking data consisting of
integers and strings.
****************************************************************************/