diff options
Diffstat (limited to 'source4/lib/tdb/common/io.c')
| -rw-r--r-- | source4/lib/tdb/common/io.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/source4/lib/tdb/common/io.c b/source4/lib/tdb/common/io.c index 5d2c5c8e2e..b3d1c56dc4 100644 --- a/source4/lib/tdb/common/io.c +++ b/source4/lib/tdb/common/io.c @@ -353,6 +353,40 @@ unsigned char *tdb_alloc_read(struct tdb_context *tdb, tdb_off_t offset, tdb_len return buf; } +/* Give a piece of tdb data to a parser */ + +int tdb_parse_data(struct tdb_context *tdb, TDB_DATA key, + tdb_off_t offset, tdb_len_t len, + int (*parser)(TDB_DATA key, TDB_DATA data, + void *private_data), + void *private_data) +{ + TDB_DATA data; + int result; + + data.dsize = len; + + if ((tdb->transaction == NULL) && (tdb->map_ptr != NULL)) { + /* + * Optimize by avoiding the malloc/memcpy/free, point the + * parser directly at the mmap area. + */ + if (tdb->methods->tdb_oob(tdb, offset+len, 0) != 0) { + return -1; + } + data.dptr = offset + (unsigned char *)tdb->map_ptr; + return parser(key, data, private_data); + } + + if (!(data.dptr = tdb_alloc_read(tdb, offset, len))) { + return -1; + } + + result = parser(key, data, private_data); + free(data.dptr); + return result; +} + /* read/write a record */ int tdb_rec_read(struct tdb_context *tdb, tdb_off_t offset, struct list_struct *rec) { |